Accorroni W Manual
A2B srl - Via d’Ancona, 37 - 60027 Osimo (An)
Technical informationW- WR - WD
Gas-fired convection heaters with fan
W - WR - WD
GAS-FIRED CONVECTION HEATERS WITH FAN
W - WR - WD SERIES
Models 8 - 10
Technical information
This manual is divided into three sections:
-SECTION 1 - GENERAL INFORMATION
This contains a description of the heaters and their technical features
-SECTION 2 - TECHNICAL INFORMATION FOR THE INSTALLER
Thiscontainsalltheinstructionsthatthetechnicalinstallermustcomplywithtoensureeffectiveplant
operation
-SECTION 3 - USER OPERATING AND MAINTENANCE INSTRUCTIONS
This section contains all the information needed to use the appliance correctly and to perform
periodic tests
Important notes:
1- Tousetheappliancecorrectlyandsafely,theinstaller,theuserandtheserviceman,mustcomply
with what is indicated in this manual.
2- The word WARNING! isfollowed byinformation which, because of its importance, must be carefully
observedand for which non-compliance may damagetheappliance and/or reduce operating safety.
3- The paragraphs written with bold characters contain important information, warnings or
recommendations which should be carefully considered.
4- Thetechnicaldata,stylingcharacteristics,componentsandaccessoriesdetailedinthismanualare
not binding. Accorroni S.r.l. reserves the right to make changes, at any time, that are considered
necessary to improve the product.
5- Thelegalreferences,standardsandtechnicalrulesmentionedinthismanualarepresentedmerely
for the sake of information and should be considered valid as of the date this manual is printed, as
indicatedon the last page. If new regulations or amendments to current laws go into effect,thiswill
not obligate Accorroni S.r.l. in any way with regard to others.
6- Accorroni S.r.l. is responsible for ensuring that its product conforms to the laws, directives and
constructionstandardsinforceatthetimetheproductissold.Knowledgeandcompliancewithlegal
regulations and standards regarding plant design, installation, operation and maintenance are the
exclusive responsibility of the designer, installer and user.
SUMMARY
SECTION 1 - GENERAL INFORMATION page
1. PRINCIPAL CHARACTERISTICS .......................................................................................... 4
1.1 Appliance classification........................................................................................................... 4
1.2 Certification - EC marking....................................................................................................... 4
1.3 Functional description............................................................................................................. 4
1.4 Construction characteristics.................................................................................................... 5
1.5 Package contents ................................................................................................................... 5
1.6 Accessories supplied on request ............................................................................................ 6
1.7 Application .............................................................................................................................. 6
1.8 The use of ducts with the WD version.................................................................................... 7
1.9 Technical data table................................................................................................................ 7
1.10 Dimensions ............................................................................. - WR and WD versions ......... 8
page 36
Gas-fired convection heaters with fan W / WR / WD series - Models 8 - 10
TechnicalInformation-Code25259501GB- Rev.3-10/05/05
WARNING!Whentheburnerturnsoff,thefanwill
continuetooperateforafewminutes,toproperly
cooltheexchanger.Therefore,itisimportantnot
toturnofftheairheaterusingthemainswitch,that
alsocutsoffthepowersupplytothefan,sincethis
mightlead to overheating.
10.4.2 To turn off the air heater for an extended
period of time:
a) set the switch (A) to the “OFF” position
b) after the fan has turned off, disconnect the
electric power supply at the main switch
c) close the gas on-off valve
10.5 SUMMER VENTILATION
During the summer the air heater can be used
for ventilating the room by performing the
following operations to deactivate the burner:
a) Close the gas on-off valve.
b) Activate the electric power supply by means
of the main switch.
c) Turnswitch(A)tothe“VENTILATION”position
and use switch (F) to select the desired
speed.
d) Turn switch (A) to the “OFF” position to stop
the fan.
11. APPLIANCE MAINTENANCE
11.1 ROUTINE MAINTENANCE TO BE
PERFORMED BY THE USER
It is recommended that the following operations
be carried out at the beginning of each heating
season and then at least once every month
during operation:
WARNING! The operations described in
points a) b) c) and d) must be performed
while the air heater is not functioning, and
with the gas and electric supplies turned off.
a) checkthat the external terminal of theintake/
exhaust duct is not obstructed or that the
flueing arrangement has not deteriorated
b) Use just a damp cloth to clean the unit’s
externalparts.Atthemostyoucanuse amild
detergent.
c) Make sure that the air circulation slits in the
remote-control panel (WR and WD) are not
obstructed by dust as this could cause the
room temperature probe to detect incorrect
values. Use a soft brush to clean it.
d) Use compressed air or a vacuum cleaner to
cleanthe air intake filter (W and WR). The air
filter must be cleaned more frequently if the
unit is installed in a dusty area.
The filter must be cleaned very carefully,
because if it does not function correctly,
the entire unit’s functioning could be
adversely affected.
e) makesurethattheoperationoftheappliance
is normal, as described in point 10.3.
11.2 ANNUAL AIR HEATER INSPECTION
Toreduce possible failures toa minimum and to
keep the air heater operating at peak efficiency,
it is recommended that a general inspection of
the air heater be carried out at least once a year
by skilled personnel.
page 2
1.10 Dimensions.............................................................................. - W version ............................ 9
1.11 Explodedview ......................................................................... - WR version ........................ 10
1.11 Explodedview ......................................................................... - WD version ........................ 12
1.11 Explodedview ......................................................................... - W version .......................... 14
1.12 Wiringdiagram ...................................................................................................................... 16
2. CONTROLANDSAFETYDEVICES..................................................................................... 17
2.1 Gascontroller ........................................................................................................................ 17
2.2 Gasvalve .............................................................................................................................. 17
2.3 Differentialpressureswitch ................................................................................................... 17
2.4 Fanthermostat ...................................................................................................................... 18
2.5 Safetythermostat .................................................................................................................. 18
SECTION 2 - TECHNICAL INFORMATION FOR THE INSTALLER
3. IMPORTANTINFORMATION ............................................................................................... 19
3.1 Qualificationsof the installer.................................................................................................. 19
3.2 Relateddocuments................................................................................................................ 19
3.3 Transport and handling ......................................................................................................... 19
3.4 Datacheck ............................................................................................................................ 19
3.5 Using theinstructions ............................................................................................................ 19
4. INSTALLATION..................................................................................................................... 19
4.1 Positioninginstructions.......................................................................................................... 19
4.2 Air intakeandflueexhaust ducts ........................................................................................... 20
4.3 Outside positioning ofthe flue gasexhaust terminal .............................................................. 21
4.4 Installationoperations............................................................................................................ 22
5. COMMISSIONING ................................................................................................................ 26
5.1 Tests ..................................................................................................................................... 26
5.2 Ignition................................................................................................................................... 26
5.3 Userinformation .................................................................................................................... 27
6. GASTYPE CHANGE ............................................................................................................ 27
6.1 Switching from gas in the second group to gas in the third group .......................................... 27
6.2 Switching from gas in the third group to gas in the second group .......................................... 28
7. OPERATINGDEFECTS........................................................................................................ 29
7.1 Preliminarytests.................................................................................................................... 29
7.2 Possibledefects .................................................................................................................... 29
8. REPLACINGPARTS............................................................................................................. 31
8.1 Controlequipment ................................................................................................................. 31
8.2 Fuses .................................................................................................................................... 31
8.3 Gas solenoidvalves .............................................................................................................. 31
8.4 Differentialpressureswitch ................................................................................................... 32
8.5 Convectionfancontrol thermostat ......................................................................................... 32
8.6 Safetylimitthermostat ........................................................................................................... 32
8.7 Electrodes ............................................................................................................................. 33
8.8 Flueexhaustfan .................................................................................................................... 33
8.9 Convectionfan ...................................................................................................................... 33
9. PERIODICMAINTENANCEOPERATIONS.......................................................................... 34
9.1 Userinformation .................................................................................................................... 34
9.2 Yearlyinspection ................................................................................................................... 34
page 35
SECTION 3 - OPERATING AND MAINTENANCE
INSTRUCTIONS FOR THE USER
10. START-UP
10.1 FIRST FIRING AND TESTING
WARNING!Thefirst firing oftheappliance and
the commissioning tests must be performed
by skilled technical personnel. Non-
compliancewiththis procedurewillinvalidate
the warranty conditions and release the
manufacturer from all responsibilities.
10.2 TESTS
Before operating the heater, make sure that the
installerhascorrectlycarriedout the installation
operationsaccordingto the regulations in force.
10.3 IGNITION
WARNING! Any operation on the appliance
not expressly described below must be
performed by skilled personnel.
10.3.1 Checkthatthegason-offvalvesareopen
and the electric power supply is on.
10.3.2 (The instructions to the control panel
functions which follow refer to fig. 35).
a) Turnthe roomthermostat knob(E) clockwise
to the maximum value.
b) Turn switch (A) upwards to the “ON” position
to start the ignition cycle. Make sure that the
red LED of the “Reset” button (B) is unlit.
If it is lit, this means that the burner’s control
equipment is in a lockout state. In this case
press the button to reset the control
equipment.TheredLED willturnoffandfrom
this moment the air heater startup cycle will
begin.
From the moment that the burner ignites, the
flame should be detected by the ionization
probe within the safety time, otherwise the
controlequipment shuts down. This situation
is indicated by the red LED (B) lighting up.
Thiscan easily take place with a new system
that still has air in its gas lines. In this case
wait approximately one minute and release
the unit by pressing the “Reset” button (D) to
start a new cycle. Repeat this operation until
theresidual air has been bled off and ignition
takes place normally.
If the shutdown condition persists, this
generally indicates that there is a fault or
an operating defect. In this case it is
recommended to contact a specialized
technician.
Theexchanger heatingphase willbegin after
the burner has been ignited (this is indicated
by the green LED (C)). The exchanger will
reach the rated operating temperature after
approximately three minutes. At this point a
thermostat will start the fan(s) for distributing
warm air in the room.
When the room has reached the desired tem-
perature,adjusttheroomthermostatbyturning
thecontrol dial slowly (counterclockwise)until
theburnerturns off(indicated bythe greenled
C). From this point on the air heater will be
completely automatic and will maintain the
desired room temperature.
c) Set the most suitable ventilation for the room
by means of switch (F). Turning the switch
upwards will activate the minimum speed,
and turning it downwards will activate the
maximum speed.
10.4 SHUTDOWN
10.4.1 Toturnoff theair heaterfora shortperiod
oftime,justusetheroom thermostat,justsetthe
switch (A) to the “OFF” position, without moving
the temperature regulation dial.
Fig. 34
CONTROLPANEL
E
D
FABC
page 3
SECTION 3 - OPERATING AND MAINTENANCE INSTRUCTIONS FOR THE USER
10. START-UP ............................................................................................................................ 35
10.1 First firing and testing ............................................................................................................ 35
10.2 Tests ..................................................................................................................................... 35
10.3 Ignition................................................................................................................................... 35
10.4 Shutdown .............................................................................................................................. 35
10.5 Summerventilation ................................................................................................................ 36
11. APPLIANCEMAINTENANCE ............................................................................................... 36
11.1 Routinemaintenanceto be performed by the user ................................................................ 36
11.2 Annualair heaterinspection .................................................................................................. 36
FIGURE SUMMARY
Fig. no. page
1 Dimensions ............................................................................. - WR / WD versions .............. 8
2 Dimensions ............................................................................. - W version ............................ 9
3 Exploded view......................................................................... - WR version ....................... 10
4 Exploded view......................................................................... - WD version ....................... 12
5 Exploded view......................................................................... - W version.......................... 14
6 Wiring Diagram..................................................................................................................... 16
7 Control equipment ................................................................................................................ 17
8 Gas unit ................................................................................................................................ 17
9 Differential pressure switch...................................................................................................17
10 Fan thermostat...................................................................................................................... 17
11 Safety thermostat.................................................................................................................. 18
12 Minimum distances for maintenance .................................................................................... 20
13 Position ................................................................................... - WR / WD versions ............ 21
14 Position ................................................................................... - W version.......................... 21
15 Definition of “type” in the regulations .................................................................................... 21
16 Terminal protection grille ...................................................................................................... 22
17 Preparations for installing the air heater................................. - WR / WD versions ............ 22
18 Preparations for installing the air heater................................. - W version.......................... 23
19 Exhaust and intake ducts........................................................ - WR / WD versions ............ 23
20 Exhaust and intake ducts........................................................ - W version.......................... 24
21 Connecting more than one unit with a single external timer................................................. 25
22 Control panel ........................................................................................................................ 26
23 Gas unit ................................................................................................................................ 27
24 Changing the type of gas......................................................................................................28
25 Changing the control equipment........................................................................................... 31
26 Changing the gas unit’s coils................................................................................................ 32
27 Changing the pressure switch .............................................................................................. 32
28 Changing the fan thermostat ................................................................................................ 32
29 Changing the safety thermostat............................................................................................ 32
30 Placement of the electrodes ................................................................................................. 33
31 Changing the flue gas expeller ............................................................................................. 33
32 Changing the fan .................................................................................................................. 33
33 Cleaning the unit................................................................................................................... 34
34 Control panel ........................................................................................................................ 35
page 34
9. PERIODIC MAINTENANCE
OPERATIONS
9.1 USER INFORMATION
Itisrecommendedtoadvisetheusertocarryout
the operations indicated in point 11.1 of this
manual at least once every two months.
9.2 YEARLY INSPECTION
9.2.1 Control and safety devices
WARNING! Specific technical skills are
requiredto test thecontrol andsafety devices
and this is why it is important to contact
skilled personnel.
9.2.2 Cleaning the unit
Remove the air heater casing’s right angular
panel by first removing the two screws that hold
it in place (protected by plastic caps) and then
using the point of a screwdriver as a lever to
releasethefasteningspringsintherear.Remove
theleftpanelandthefrontpanelbyreleasingthe
snap springs. Remove any dust deposits from
the intake filter and from the air delivery grille.
Alsocleantheexchanger’sexteriorandthefan’s
exteriorusing abrush ora jet ofcompressed air.
Remove any dust deposits from the safety and
fan thermostats and from the room thermostat
sensor.
Remove the 6 screws which attach the door to
the combustion chamber. Remove it, making
sure not to damage the seal gasket. Check the
condition of the burner and its parts. Check that
therearenocarbondepositsinsidetheexchanger Fig. 33
CLEANINGTHEUNIT
pipe.Ifdepositsare found,lookfor thecausesof
whatislikelytobenon-efficient combustion.Put
the door back in place, making sure that the
corresponding gasket is in the correct position.
Check that the external intake and exhaust
terminalsareinthecorrectpositionandthatthey
are clean.
Check the condition of the electric system and
check the efficiency of the connections.
Carefully replace the components and check
that they operate correctly (fig. 33). Carefully
carryout all the operations described from point
5.1 to point 5.2.2 and, if problems arise, consult
chapter 7about operating defects.
page 4
1. PRINCIPAL CHARACTERISTICS
1.1APPLIANCE CLASSIFICATION
The W, WR, and WD air heaters are defined as
“Independent gas-fired convection heaters
equipped with a fan in the combustion circuit”.
In addition, they are classified according to
harmonised European standards EN 437 and
prEN 1266 into:
category - according to the types of gas, at the
different supply pressures, that they can use;
type - according to the possible methods to
exhaust the combustion productions (see also
4.2.1).
1) Category II2H3+
theheaterisequippedtousegasthatbelongsto
twofamilies.The atmosphericburnercan befed
with gas from the second group (natural gas -
group H) and gas from the third group (butane
and propane at the two pressure ratings 28-30
and 37 mbar)
2) Type C12
The combustion circuit is sealed with respect to
the environment in which it is installed and the
combustion air supply and combustion product
exhaustlinesareconnectedoutsidetheroomby
means of flues which pass directly through the
outside wall of the room.
3) Type C52
The combustion circuit is hermetically sealed
with respect to the environment in which it is
installed and the combustion air supply and
combustionproductexhaustlinesareconnected
outside the room by means of separate ducts
with terminals which need not necessarily be
adjacent to each other.
1.2 CERTIFICATION - EC MARKING
The W, WR, and WD air heaters, as previously
described and classified, have obtained the “CE
type test certificate” in conformity with EEC
Directive 90/396 and with reference to the
harmonised European standard prEN 1266.
Attaching the CE marking shown below also
guarantees that the appliance conforms with
EEC directive 73/23 (“Low voltage”) through the
harmonised standard EN 60335-1 and EEC
directive89/336(“Electromagneticcompatibility”)
throughthe standards EN 50081-1and50082-1.
SECTION 1 - GENERAL INFORMATION
Itis importantto point outthat, to protectthe end
user, attaching the CE marking means that the
manufacturer must submit a declaration of
conformityfor the entire lineofproducts with the
certifiedcharacteristicsandperformanceratings.
This is possible through the use, by the
manufacturer, of a Quality Assurance system.
Theefficiency of that systemis controlled by the
Organisation which issued the certification.
1.3 FUNCTIONAL DESCRIPTION
Thesystemismadeupofindependentunitsthat
are easily installed. There are three versions of
these units:
-For wall installation (W version), in spaces
under windows, or in all situations where free
spaceis available or where this solution would
present technical or functional advantages.
-For ceiling installation (WR version), in
rooms, where there is not enough free space
on the walls.
-For ceiling installation, with duct con-
nection (WD version), with installation of
ducts for distributing the treated air. This
makes it possible for a single unit to serve
severalrooms,withthepossibilityof changing
the air with fresh air.
TheW,WR,andWDairheatersconsistbasically
of a heat exchanger unit which exchanges heat
betweenthecombustionproductsofagasburner
and the air flow delivered by a fan.
Theairheaterisalsoequippedwithanelectronic
control panel (operated by remote control for
installation on the ceiling, installed on the unit if
the unit is mounted on the wall) which indicates
the unit’s main functions and includes a
thermostat.
The technology used to build the burner also
ensures very low emission of polluting NOx
(nitrogen oxides) for this category of appliance.
0694
page 33
8.7ELECTRODES
Disconnect the cable connection on the control
equipment. Remove the fastening screws and
pull out the electrodes from the burner plate.
Insert the new electrodes, attach the supports
and re-establish the electrical connection. To
check the position of the electrodes on the
burner, remove the combustion chamber door,
makingsurenot todamage theseal gasket.The
position of the electrodes with respect to the
burner must correspond to what is shown in
figure 30. Replace the door while checking that
the relative gasket is in the correct position.
8.8 FLUE EXHAUST FAN
Disconnect the motor electrical connection and
loosen the three scroll fastening screws. Gently
remove the motor-fan unit and, respecting the
original position, insert the new unit (fig. 31).
Tightenthescrewsandre-establishtheelectrical
connection. Make sure the fan rotates correctly
and without friction.
IMPORTANT! Toaccessthefluegasexpellerin
the WR and WD versions for ceiling installation,
free the inside intake duct by undoing the
fastenings and sliding the external duct along
thealuminum sheath installed in the wall. When
youhave changed it, make sure thatyou put the
duct correctly back in place and check that the
connections are sealed well.
8.9 CONVECTION FAN
Disconnect the electrical connection from the
fanmotorconnections.Unscrewthescrews that
attach the fan support to the air heater’s back
panel. Insert the new fan, including supports, in
itsposition(fig.32).Attachthefan supportusing
thescrewsthatwerepreviouslyremovedandre-
establish the electrical connection.
Fig. 30
PLACEMENTOFTHEELECTRODES
3 mm
Ignition
electrode
Detection
electrode
Fig. 32
CHANGINGTHEFAN
Screws
Fan Supports
Screws
Fig. 31
CHANGINGTHEFLUEGASEXPELLER
Motor / fan
Combustion
chamber
Exchanger
Gasket
page 5
Thefantakesintheroomairwhichisthenheated
as it passes through the heat exchanger. The
warmairisdischargeddirectlyintotheenvironment
throughthegrille locatedatthetopor frontof the
appliance.
Fan operation is controlled by a thermostat: to
prevent cold air from entering the environment.
Thefanbeginsoperatingshortlyaftertheburner
hasignited.Thefanrunsforashorttimeafterthe
burnerisextinguished,toallowtheexchangerto
cool off gradually.
Iftheairfilter becomesblocked orif thefan does
not turn on or function correctly, and as a
consequencetheexchangeroverheats,asafety
device will be triggered that will cut off the gas
flow to the burner. This shutdown condition will
also be indicated on the control panel.
Thecombustionproductsareexhaustedoutdoors
by a centrifugal fan whose correct functioning is
controlled by a differential pressure switch. The
fanis located after the sealedcombustioncircuit.
Thecombustioncircuit’spressureisalwayslower
than the room’s air pressure, thus providing an
additional safety feature.
Airheateroperationiscontrolledbytheelectronic
room thermostat on the remote-control panel
and by an optional programmable timer that is
installed separately.
1.4 CONSTRUCTION CHARACTERISTICS
The casing is built with epoxy-powder painted
metal plate which guarantees its durability. In
the WD versions with ducts the casing is built
with galvanized metal plate and has removable
inspection panels.
Theair deliveryside (inthe Wand WR versions)
hasa grille with painted aluminum blades which
can be individually oriented to permit you to
direct the air flow where you want in the room.
The blades are attached to supports made of
heat-resistant plastic. They rotate by means of
an exclusive friction system on silicone guides.
There is a small door to the side of the grille
which, in the W version for installation on the
wall, protects the access to the control panel.
Thisisespeciallyusefulwhentheunitisinstalled
inpublicplaces,becauseitpreventsthecontrols
from being set to undesired positions, for
example,by children (the small door is not used
in the ceiling version since the remote-control
panel is installed on the wall).
In the WD versions with ducts the grille and the
adjustable blades have been replaced by an air
outletthat is designed to have ducts attached to
it. Also the air intake side has been designed to
have ducts attached to it.
The air intake side (in the W and WR versions)
houses a filter made of regenerable synthetic
materialin a metal framewhich can be removed
for cleaning.
The following are installed inside the unit:
-The heat exchanger unit with gas burner.
This module, which was developed using
patented technical solutions, is made of
stainless steel. It is basically made up of a pair
of finned tubes which exchange heat very
efficiently and a combustion chamber which
housesan atmosphericburner whichgenerates
an axial flame. The combustion products are
exhausted outdoors by a centrifugal fan.
-The ventilation unit, which is made up of two
centrifugal fans with double intake. They have
a high air capacity and a low noise level. They
are activated by an electric motor whose
rotation speed is controlled from the control
panel. The unit is mounted on a galvanized
steel support.
-The set of control devices, which includes:
- Burner control unit with electronic ionization
flame detection.
- Gas solenoid valve with a double closing
device and a pressure regulator.
- Differential pressure switch for controlling
thatthe combustion productsare exhausted
properly.
- Fan control thermostat.
- Safety thermostat.
-The control panel (operated by remote
control in the WR and WD versions). It is
ableto control the roomtemperature by means
of a built-in probe and to indicate the
functioning status or any problems with the
unit. It also allows you to select one of its two
ventilation speeds.
1.5 PACKAGE CONTENTS
The unit is shipped in two separate packages:
a) The unit: The air heater is shipped with
cardboard packing and polystyrene foam
protection corners and sheets. For the W
version, for installation on the wall, the
electronic control panel is already installed
on the unit. Instead, for the WR and WD
versions for installation on the ceiling, the
controlpanelis already connected to the unit
withfourmeters of cable; the accessories for
page 32
8.4 DIFFERENTIAL PRESSURE SWITCH
Disconnect the electrical connection and the
siliconetubes. Unscrew the screwsandremove
the pressure switch. Install the new pressure
switch(whichhasbeencalibratedspecificallyfor
your air heater model) and re-establish the
connections, making sure that you place the
contactsintheirproperpositions.Putthesilicone
tube back in place (fig. 27).
8.5 CONVECTION FAN CONTROL
THERMOSTAT
Disconnect the cables and unscrew the
thermostatfromthe threadedsupport. Insertthe
new thermostat, screwing it all the way in by
hand (do not use tools which might damage the
thermostat).Makesurethatthedistancebetween
the thermostat enclosure and the threaded
support is not greater than 3 mm, to guarantee
that the sensor remains in contact with the wall
of the exchanger. Re-establish the electrical
connection (fig. 28).
8.6 SAFETY LIMIT THERMOSTAT
Disconnect the electric connection of the
thermostat on the terminal board. Release the
thermostat by disassembling the attachment
platefromthesupport.Mountthenewthermostat
byreversingtheorderofthepreviousoperations.
Make sure to insert the side of the thermostat
with the printed data facing the air heater shield
(fig. 29).
Fig. 28
CHANGINGTHEFANTHERMOSTAT
Exchanger
Threaded
support
Thermostat
Unscrew
Fig. 27
CHANGINGTHEPRESSURESWITCH
Siliconetubes
Pressure switch
Screws
Electricalconnection Fig. 29
CHANGINGTHESAFETYTHERMOSTAT
Backplate
Thermostat
Screw
Attachment
plate
Fig. 26
CHANGINGTHEGASUNIT’SCOIL
Coilsupport
Gasunit
Screws
Solenoid
valvecoils
Valve rectifier
bridge
page 6
attaching the control panel to the wall are
included. This package also contains the
following:
- Thewarranty documents and this technical
information manual for the installation and
maintenance of the unit.
- Agas conversion kit and an adhesive label.
- The paper template to be used for the
installation.
b) The standard accessories:this box contains
the following material:
WR and WD versions for ceiling installation
- The ducts and terminals for the exhaust of
the combustion products and the intake of
the combustion air supply.
- Two clamps with a silicone gasket for
holding the ducts.
- Two aluminum tubes, with a diameter of 70
mm and a length of 40 cm, to be used as a
sheathwhen going throughtheoutside wall.
W Version for wall installation
- The flues and terminals for the exhaust of
the combustion products and the intake of
the combustion air supply. They are
equipped with a flange for mounting them
on the rear of the unit.
- Aceramic fiber gasket for the intake duct’s
mounting flange.
- Screws for installing the ducts and their
flanges.
1.6 ACCESSORIES SUPPLIED ONREQUEST
In addition to the material described above, the
following accessories can also be supplied on
request:
-For all versions
- Straight flues that are 0.5 and 1 meter long
anda 90° elbow,all of which have adiameter
of 60 mm. They come complete with
connecting clamps. They are used to
construct air intake ducts and exhaust flues
up to the maximum length of 3 + 3 meters.
-For the WR and WD versions for ceiling
installation
- Airlock with inside/outside air intake plenum
system, available in a manual or motorized
version.
- Intake grille for the above air lock, with the
possibility of installing an air filter.
-For the WR version for ceiling installation
- Rear base for covering the connections.
-For the WD version with ducts for ceiling
installation
- Air delivery plenum system designed to use
insulated flexible pipes with a diameter of
200 mm.
- Insulated flexible pipes with a diameter of
200 mm for distributing heated air. They
come in a package that contains 6 meters of
flexible pipes.
- Clamps for tightly connecting the insulated
flexible pipes.
- 135° Y-branch for use with the insulated
flexible pipes.
- Heated air delivery outlets with adjustable
fins, air lock and plenum system with a
connector that has a diameter of 200 mm.
- Circular diffuser that has a diameter of 200
mm, to be installed on the ceiling, with
calibration air lock.
- Grilleforpassageunderdoors, 400x 150mm.
1.7 APPLICATION
The W, WR, and WD gas-fired air heaters are
units that were developed for creating small or
mediumautonomoussystemsforwinterheating
in residential or commercial buildings,
restaurants, bars, etc.
These systems are especially suitable for use in
the field of building renovation, because the
remodelingofbuildingunitsasresidences,offices,
stores,orworkshopsiscomplicatedbyaseriesof
technical and structural problems that make it
difficult to install a traditional heating system.
These systems represent a new alternative to
the traditional gas-fired heating systems. They
combine high heating efficiency with low
operating costs. This is especially true in rooms
that are occupied only during set hours where
thegas-firedairheaters’featureof havingavery
low thermal inertia permits their operating time
to be considerably reduced, resulting in
considerable energy savings.
It is possible to create modular systems (i.e.,
systems made up of one or more units) with the
W, WR, and WD gas-fired air heaters to satisfy
theheatingneedsofbuildingssuchasapartments,
stores, offices, restaurants, and workshops.
Therefore it is necessary to evaluate the heat
dispersion of the room or rooms, the extent of
solar radiance, and any free supply of heat, and
thus the required thermal power. Then it will be
necessary to choose the amount and type of
units based on values such as the air capacity
and the available pressure.
page 31
8. REPLACING PARTS
Since specific technical skills are required to
replace the parts listed below, it is
recommended to advise the user to always
contactskilledtechnical personnel. Forsafety
and quality reasons, it is recommended to
use original spare parts when replacing
components.
WARNING!All the following operations must
be carried out while the heater is turned off,
and disconnected the gas and electric
supplies.
8.1 CONTROL EQUIPMENT
Disconnectthe cablesby pullingonthe terminals
and extracting the connectors, releasing them
first from the special retainer. Replace the
equipmentandattachitusingthetwoself-threading
screws. Insert the terminals and the connectors
into their respective positions (fig. 25).
8.2 FUSES
Remove the blown fuse from the printed circuit
on the electrical board inside the air heater.
Replace it with a new fuse (5 x 20 - 2 Amps -
instantaneous type) by exerting slight pressure
until it enters its position.
8.3 GAS SOLENOID VALVES
Disconnect the electric connection on the gas
unit. Remove the two screws that attach the
metal support block of the coils and remove it
fromthehousing.Pulloutthecoil(s)fromtheunit
and replace them with new ones. Replace the
metal support block in the correct position and
tighten the fastening screws. Re-establish the
electrical connection (fig. 26).
necessarytoreplacethepanel.Becausethese
are electronic components, do not attempt
repairs on the panel’s printed circuits.
b) Thedifferentialpressureswitchstopstheburner
becausethefluegasexpellerfan’scapacityis
not correct due to an obstruction in the ducts
or to the ducts being too long.
- Remove any obstructions and/or check the
lengthofthe ductsin accordancewithwhatis
indicated in point 4.2.2.
Fig. 25
CHANGINGTHECONTROLEQUIPMENT
Equipmentcasing
Connectorsandterminals
for the electrical connections
page 7
WARNING! It is important to verify that the
installation is in compliance with current
regulations and that it is approved, wherever
necessary, by the competent inspection
authorities.
1.8 THE USE OF DUCTS WITH THE WD
VERSION
The technical, functional, and aesthetic
characteristics of the W and WR air heaters
have been researched to achieve their optimal
use inside the rooms where heating is required.
Theexperiencewehaveacquiredinthesetypes
of applications has resulted in further possible
solutions for the WD version, which was
specifically developed for installation on the
ceiling with ducts.
This version has a galvanized steel casing and
was designed to be connected to intake and
delivery ducts. Since the WD air heaters were
designedexclusivelyforinstallationontheceiling,
theycomecompletewitharemote-controlpanel.
This makes it possible to use a single unit to
serveseveral rooms or to install theairheater in
a separate room.
Typical examples of these situations could be:
- Efficiency apartments.
- Tourist accommodations, bungalows, etc.
- Doctors’ offices, offices.
- Bars, stores, etc., with the system installed in
a service room.
Using ducts to distribute the air provides a
solution that satisfies most current installation
requirements,with the distribution of the treated
air at a low noise level. However, it is advisable
to contact a qualified heating technician to
evaluate specific installation problems.
1.9 TECHNICAL DATA TABLE Unit W-WR 8 WD 8 W-WR 10 WD 10
Ratedthermalcapacity kW 8,90 10,50
kcal/h 7.650 9.030
Ratedthermalpower kW 8,05 9,50
kcal/h 6.900 8.150
Gas flow rate G20 Methane m³/h 0,94 1,11
(15 °C - 1.013 mbar) G30Butane kg/h 0,70 0,83
G31Propane kg/h 0,69 0,81
Gas pressure G20 p 20 mbars mbar 14,5 12,0
at the burner G30 p 28-30mbars mbar 27,0 - 29,0 27,0 - 29,0
(15°C-1.013 mbars) G31 p 37 mbars mbar 36,0 36,0
Diameterof the G20 mm/100 240 280
gas injector G30 / G31 mm/100 150 170
Ventilation Minimumspeed m³/h 720 750 850 900
aircapacity Maximumspeed m³/h 850 860 1.040 1.040
Noise level Minimumspeed dBA 42 41,5 43 46,5
at 3 meters Maximumspeed dBA 43 44,6 45,5 49
Effectivepressure Maximumspeed Pa / 40 / 40
Gassupply diameter in. G 1/2 A
Flue gas discharge / air supply diam. mm 60
Electricpower supply 230 V ~ / 1 / 50 Hz
Fuse (rapid type) A 2
Power absorbed W 170 180 180 190
Net weight kg 56 54 58 56
page 30
b) Theignition electrodeis nolonger connected
to the equipment connector.
- Restore the connection or replace the
electrodes. Do not make any connections so
astoavoidreducing thecable insulationlevel.
c) Theignition electrode(s) is (are)notcorrectly
positioned or the ceramic insulation is
damaged, with a subsequent leakage of the
ignition discharge.
- Replace the ignition electrode(s).
7.2.4 At the end of the preventilation phase,
the ignition discharge takes place, but
the flame does not ignite and the
control equipment shuts down within
the safety time
a) There is no gas supply or there is air inside
the piping.
- Determine the reason why there is no gas
supply by first checking the on-off valves on
the delivery line. Completely bleed off any
residual air and restart the unit.
b) Thegassolenoidvalvesdonotopenbecause
the coils are malfunctioning or their electrical
connection has been interrupted.
- Check that the connection cable and the
correspondingterminalsareingoodcondition.
Use a special tool to verify if the coils have
failed and replace them, if necessary (see
point 8.3).
c) The safety thermostat is malfunctioning and
does not allow the solenoid valves to open.
- Replace the safety thermostat (see point
8.6).
7.2.5 At the end of the preventilation phase,
the ignition electrode sparks and the
flame ignites correctly, but the control
equipmentshuts down withinthe safety
time
a) The phase-neutral electric power supply is
not correctly connected to the respective
terminals, marked as “L” and “N”, and
reversing the polarity may deactivate the
flame detection device.
- Check using a multimeter or phase detector
and correctly connect the cables to the
corresponding terminals.
b) The flame detection electrode is not correctly
positionedand isnot incontactwith theflame.
- Check if the electrode is properly connected
and if there are any deformations. Comply
with what is indicated in figure 30.
c) The flame detection electrode electric
connection has been interrupted.
- Check the electrode connection to the control
equipment.Ifthecableorceramicinsulationis
damaged,replacetheelectrodeinaccordance
with the positions shown in figure 30.
7.2.6 Thecontrol equipmentlocks outduring
normal operation
a) Thegassupplywascutoffandtheequipment,
afterrepeating the ignition cycle, and without
detecting the flame within the safety time
period, entered the lock out mode.
- Determine why the gas supply to the air
heaterwasinterrupted.Restarttheappliance
using the Reset button on the control panel.
b) Theincorrectpositioningoftheexternalintake
andexhaustterminalshascausedcombustion
productstoreturnandthispreventsthe flame
fromignitingproperlyandfrombeingdetected
by the electrode.
- Changethepositionsoftheoutsideterminals,
keeping in mind that the exhaust terminal
muststick out fartherthan the intake terminal
(see fig. 19 and fig. 20). Check that the
terminals are not installed inside niches or
recesses in the walls and that there are no
obstructions that prevent the air from
circulating freely.
c) The safety thermostat cuts off the supply to
the gas solenoid valve because overheating
has occurred due to incorrect operation or a
failure of the convection fan(s).
- Check for obstructions or dust deposits on the
filter and/or on the fan. Replace the
malfunctioningfan,ifnecessary(seepoint8.9).
d) The safety thermostat cuts off the supply to
the gas solenoid valve because overheating
hasoccurredduetoincorrectoperationofthe
fan control thermostat.
- Replacethefan controlthermostat(seepoint
8.5).
7.2.7 The burner stops while it is operating,
eventhoughthe roomtemperaturedoes
not require it
a) The control panel’s room thermostat is
defective or the panel (in the versions to be
installed on the ceiling) is not correctly
positionedin the room to detect the tempera-
tureproperly.
- If you believe that the panel’s position is
correct, but there is still a defect, it will be
page 8
Fig. 1
219
1.220
613
32
212
151
930
38
171
160
69
40
136
190
910
219
212
150
657
1.10 DIMENSIONS - WR and WD versions for ceiling installation
Bottom view of
the WR version
Frontview ofthe WRversion
Frontview ofthe WDversion
Side view of the WR version
Side view of the WD version
Rear view of the WR version
Rear view of the WD version
ISO 228/1 G1/2”Agasconnection
Airintake, Ø60
190
108 Flue gas discharge, Ø 60 Airfilter
Optionaltimercableoutlet
Electricpowersupplycableinlet
Controlpanelcableoutlet
page 29
7. OPERATING DEFECTS
7.1 PRELIMINARY TESTS
Beforeperforming specifictests, makesure that:
a) Theelectricpowersupplyisproperlyconnected
(pay particular attention to the phase-neutral
polarity and ground connector) and that any
externaladjustmentcomponents(forexample,
theprogrammabletimer)functioncorrectly.
b) Thegassupplyiscorrect,thegason-offvalve
is open, and the pressure to the burner
corresponds to what is indicated in the
technical data table.
c) The external terminals of the combustion air
intake duct and the combustion product
exhaust flue are not obstructed and that the
materialtheyaremadeofhasnotdeteriorated.
d) The control panel functions correctly.
7.2 POSSIBLE DEFECTS
The following is a list of possible defects along
with their probable causes. The information
indicated in italics refers to repair operations or
corrections which are the responsibility of the
authorised Technical Service Centre.
7.2.1 The appliance does not start even if the
conditions described in the previous
points are correct.
a) the flame detection circuit of the control
equipmentis malfunctioningand theinitial self-
check does not allow the cycle to continue.
- Replace the control equipment (see point
8.1).
b) The flame detection electrode has an earth
leakage.
- Check the correct position of the electrode.
The ceramic insulation material may be
cracked and this is difficult to determine
visually.Incaseofdoubt,replacetheelectrode
(see point 8.7).
c) The differential pressure switch’s contacts
are frozen in the position they assume when
the draft is correct.
- Changethepressure switchifits microswitch
does not reset the contacts to the proper
position (see point 8.4).
d) The flue gas expeller fan’s motor has failed
and the differential pressure switch will not
allow startup to proceed.
- Changethefan.Becarefultoreassemblethe
unit as shown in figure 31 (see point 8.8).
7.2.2 The control equipment does not shut
down, but the cycle remains in a
continuous preventilation phase
a) The differential pressure switch will not allow
startup to proceed because the flue gas
exhaust flue or the air supply duct is
obstructed.
- First eliminate any obstructions from the
terminals.Inanycasechecktheentirepathof
the ducts for damage or alterations.
b) The differential pressure switch will allow
startup to proceed because the flue gas
expeller fan does not function correctly and
does not develop enough suction.
- Check to see if there are any problems of
wear with the rotation of the fan motor. Make
sure that the fan is positioned correctly, that
thereisnothingthatinterfereswiththerotation,
and that there are not any deformations. If
necessary, change the fan. Be careful to
reassemble the unit as shown in figure 31
(see point 8.8).
c) The differential pressure switch will not allow
startup to proceed because it is broken or its
electrical connection has been interrupted.
- Check that the connection cable and the
correspondingterminalsareingoodcondition.
Do not attempt to adjust the pressure switch
by removing the seal; instead, change it.
d) The differential pressure switch will not allow
startuptoproceedbecausethepressureinlet
tube is obstructed or the silicone connection
tube is disconnected or broken.
- Makesurethatthesiliconetubeisconnected
correctly and that it does not have any holes
or cuts in it. If it is not damaged, check the
steel pressure inlet tube and remove any
obstructions or deposits from it. It will be
necessary to access the inside of the
exchanger’s flue gas collector to completely
carry out this operation.
7.2.3 At the end of the preventilation phase,
theignition electrodes donot discharge
and the control equipment shuts down
within the safety time
a) The ignition transformer is malfunctioning.
- Replace the controller which contains the
transformer. Because these are electronic
components, it is advisable not to attempt to
replacejustthetransformer,especiallyif you
do not use the proper tools.
page 9
1.10 DIMENSIONS - W version for wall installation
Fig. 2
1.220
613
Topviewofthe
W version
219
212
930
151
Bottom view of
the W version
69
491
40
38
190
Airintake, Ø60
Airfilter
300
28 1.164
119
190
392
113
Rear view of
theWversion
ISO228/1G1/2”A
gasconnection
Electricpowersupplycableinlet
Fluegas discharge,
Ø 60
page 28
the technical data table. If the gas supply
pressure does not correspond to the value
indicated,usethepressureregulator(second
stage)installedexternallytoobtainthecorrect
value
h) remove the pressure gauge tube and tighten
the pressure inlet screw
i) useaspecialsprayorelectronicleakdetector
to identify any leaks in the gas circuit
j) Puttheairheatercasing’srightangularpanel
back in its position and fasten it in place.
6.2 SWITCHING FROM GAS IN THE THIRD
GROUP (LPG) TO GAS IN THE SECOND
GROUP (NATURAL GAS)
a) Check that the adaptation kit envelope
contains the replacement injector and the
adhesive label on which to indicate the new
typeofgasbeingused,toreplacetheprevious
label.
b) Check that the injector diameter required for
the type of gas to be used (see the technical
data table on page 7) corresponds to the
diameter stamped on the injector.
c) Closethegason-offvalveanddisconnectthe
electricpower supply. Remove the air heater
casing’sright angular panel by first removing
thetwoscrewslocatedonthefront(protected
by plastic caps) and then using the point of a
screwdriverasalevertoreleasethefastening
springs in the rear.
d) Remove the 2 screws which attach the gas
supply pipe connector to the combustion
chamber (fig. 24). Gently remove the
connectoruntiltheinjectorisfreeandunscrew
it using a 10-mm hex wrench. Insert a new
injector and retighten it to ensure a proper
seal. Put the connector back in place and
attach it to the combustion chamber with the
two screws.
e) on the gas unit, remove the screw block with
pinlocated on the pressureregulator to reset
regulation operation (fig. 24)
f) start the air heater according to what is
indicated in point 5.2
g) insertthewatercolumnpressuregaugetube
intothepressureoutleton thegasunitburner
(fig. 23) after having backed off the closing
screw a few turns. Check that the supply
pressure corresponds to what is indicated in
the technical data table. If the gas supply
pressure to the burner does not correspond
to the value indicated, use the pressure
regulator (fig. 23) to obtain the correct value.
Turn counterclockwise to decrease the
pressure and clockwise to increase the
pressure
h) remove the pressure gauge tube and tighten
the pressure inlet screw. Insert the regulator
protection plug (original equipment)
i) useaspecialsprayorelectronicleakdetector
to identify any leaks in the gas circuit
j) Puttheairheatercasing’srightangularpanel
back in its position and fasten it in place.
Fig. 24
CHANGINGTHETYPEOFGAS
Plastic pressure
regulator screw
Protectionplug
Gasunit
Gasinjector Screw block with pin
for gas in group III
page 10
Fig. 3
1.11 EXPLODED VIEW - WR version for ceiling installation
page 27
decreasethepressureandclockwisetoincrease
the pressure (this operation can be carried out
only when using methane gas G20).
Turn the room thermostat dial to the minimum
value and check that the burner shuts off.
Remove the pressure gauge tube and tighten
thepressureregulatorscrew,carefully checking
the seal. Replace the regulator protection plug.
WARNING!When theburner turnsoff, thefan
will continue to operate for a few minutes, to
properly cool the exchanger. Therefore, it is
important not to turn off the air heater using
the mains switch, that also cuts off the power
supply to the fan, since this might lead to
overheating.
Then repeat the start-up operation to observe
and check that the burner has ignited correctly
and that the flame is stable.
For installation with ducts (WD). While the
burnerisfunctioning,use theswitch(F)toselect
the minimum fan speed, and run the unit for
approximately 20 minutes. During this period
verifythattheheatedairfreelyandproperlyexits
the duct’s grilles or outlets. If there are any
obstaclesorincorrectadjustmentstotheoutlets,
or if the size of the ducts is incorrect, the safety
system could be activated. If this occurs, try to
locate and eliminate the possible causes of the
overheating.
Once the checks have been completed, put the
casing’s panels back in place and make sure
thattheyarecorrectlyattached.Placetheplastic
finishing caps in any fastening holes that have
remained open.
5.3 USER INFORMATION
It is recommended that the user be informed
about all the procedures necessary to use
the air heater correctly, with particular
reference to the ignition and shutdown
phases and about the importance of periodic
tests, which must be performed at least once
every year by skilled personnel.
6. GAS TYPE CHANGE
6.1 SWITCHING FROM GAS IN THE SECOND
GROUP (NATURAL GAS) TO GAS IN THE
THIRD GROUP (LPG)
a) Check that the envelope supplied with the air
heatercontains the replacement injector, the
screw block with pin and the adhesive label,
onwhichtoindicatethenewtypeofgasbeing
used, to replace the original one
b) check that the diameter of the injector
indicated for the type of gas to be used (see
technical data table on page 7) corresponds
to what is stamped on the injector.
c) Closethegason-offvalveanddisconnectthe
electricpower supply. Remove the air heater
casing’sright angular panel by first removing
thetwoscrewslocatedonthefront(protected
by plastic caps) and then using the point of a
screwdriverasalevertoreleasethefastening
springs in the rear.
d) Remove the 2 screws which attach the gas
supply pipe connector to the combustion
chamber (fig. 24). Gently remove the
connectoruntiltheinjectorisfreeandunscrew
it using a 10-mm hex wrench. Insert a new
injector and retighten it to ensure a proper
seal. Put the connector back in place and
attach it to the combustion chamber with the
two screws.
e) Unscrew the pressure regulator protection
plug located on the gas unit. Insert the screw
block with pin in the place of the protection
plug and tighten it so as to put the regulator
out of service (fig. 24). Keep the pressure
regulator protection plug for future use.
f) insertthewatercolumnpressuregaugetube
intotheupstreampressureinletontheburner
(fig. 23) after having backed off the closing
screw a few turns
g) start the air heater according to what is
indicated in point 5.2. Check that the supply
pressure corresponds to what is indicated in
Fig. 23
GASUNIT
Electrical
connection
Pressure
regulator screw
Gas
Pressuretest-point
Pressureinlet
page 11
LEGEND OF THE COMPONENTS
WR version for ceiling installation
1 Bottom panel
2 Angular panel
3 Left panel
4 Air filter
5 Filter attachment knob
6 Casing crossbar
7 Adjustable grille blades
8 Right support for blades
9 Left support for blades
10 Rubber gasket for blades
11 Grille left support
12 Grille right support
13 Middle support for blades
14 Fan injector
15 Fan scroll
16 Fan support
17 Fan motor cradle
18 Fan motor
19 Fan motor attachment U-bolt
20 Centrifugal fan
21 Fan motor capacitor
22 Remote-control panel
23 Door to the controls (not used)
24 Pressure switch tubes
25 Burner control device
26 Printed electric circuit
27 Electrical board support
28 Pressure switch
29 RFI filter
30 Exchanger left support
31 Fan left support
32 Exchanger right support
33 Fan right support
34 Heatexchanger
35 Exchanger gaskets
36 Exchanger insulating gasket
37 Fan thermostat
38 Turbulator
39 Flue gas expeller gasket
40 Flue gas expeller
41 Combustion chamber door
42 Door gasket
43 Combustion chamber
44 Burner
45 Burner bracket
46 Exchanger/combustion chamber gasket
47 Back plate/combustion chamber gasket
48 Electrodes
49 Gas injector
50 Intake gasket
51 Inner intake connector
52 Inner intake duct
53 Inner exhaust flue
54 Gas supply pipe
55 Gas pipe gasket
56 Gas solenoid valve
57 Attachment plate
58 Bushings
59 Back plate
60 Safety thermostat protection
61 Safety thermostat
62 Safety thermostat electric terminal board
63 Clamps for holding the ducts
64 Terminals
65 Exhaust flue
66 Intakeduct
67 Valverectifierbridge
page 26
5. COMMISSIONING
WARNING! The commissioning of the
appliance must be performed by skilled
technical personnel.
5.1 TESTS
5.1.1 Before starting the air heater, make sure
that all the current provisions and standards
relevant to the installation of these appliances
have been observed. Pay particular attention to
thecorrectpositioningofthecombustionproduct
exhaust terminal.
5.1.2 Make sure that the single-phase, 230 V ~
50 Hz electric power supply and the earth wire
areconnectedtothespecialairheaterterminals.
The phase conductor must be connected to the
terminalmarkedwiththeletter“L”, otherwisethe
controlequipmentwillgenerateasafetylockout.
5.1.3 Check that the burner is designed for the
type of gas to be used (table on page 7).
WARNING!Theappliance isdeliveredalready
set in the factory to use natural gas G20, with
a supply pressure of 20 mbar. Instead, if gas
from the third group is used (LPG), first carry
out the operations described in point 6.1.
5.1.4 Check that the gas on-off valves on the
meterandon theair heaterare open.Make sure
thattheairinsidethegassupplypipinghasbeen
purged.
5.2 IGNITION
5.2.1 Ignition procedure
(Refer to figure 22 when reading the following
section )
a) Turn the room thermostat knob (E) clockwise
to the maximum value.
b) Turn switch (A) upwards to the “ON” position
tostartthe ignition cycle. Make sure that the red
LED of the “Reset” button (B) is unlit.
If it is lit, this means that the burner’s control
equipmentisinalockoutstate.Inthiscasepress
the button to reset the control equipment. The
redLEDwillturnoffandfromthismomenttheair
heater startup cycle will begin.
From the moment at which the burner is ignited,
the flame must be detected by the special
ionisation sensor within a specific safety time,
otherwise the control equipment enters the lock
out mode, indicated when the red light on the
button turns on (B).
This may occur in particular in a new appliance
due to air in the gas piping. In this case, wait
about one minute and reset the appliance by
pressing the “reset” button (D) to begin a new
cycle.Repeat the operation until the residual air
has been purged and the ignition is regular.
The exchanger heating phase will begin after
the burner has been ignited (this is indicated by
the green LED (C)). The exchanger will reach
the rated operating temperature after
approximately three minutes. At this point a
thermostatwill start thefan for distributingwarm
air in the room.
When the room reaches the desired temperatu-
re,adjusttheroomthermometerbyslowlyturning
its knob counterclockwise until the burner turns
off (this is indicated by the green LED C). At this
point the air heater will function completely
automatically and will keep the room at the
desired temperature.
5.2.2 Controls
WARNING! When operations or visual
inspections are performed on the air heater,
be extremely cautious and work under safe
conditions.
Insert the water column pressure gauge tube
into the pressure outlet on the gas unit (fig. 23)
afterhavingbackedoffthesetscrewafewturns.
Start the air heater and check that the pressure
atthe burner corresponds towhat is indicated in
the technical data table.
Ifthe pressure of the gas deliveredtothe burner
does not correspond to the value indicated, use
the special pressure set screw (fig. 23), after
having removed the protection plug, to obtain
the specified value. Turn it counterclockwise to
Fig. 22
E
D
FABC
CONTROLPANEL
page 12
Fig. 4
1.11 EXPLODED VIEW - WD version with ducts for ceiling installation
page 25
mm and which has an adequate capacity, to
be used as a general switch to turn off the
units.
Insertthepowersupplycablethroughitsbushing,
making sure to cut the wires so that the yellow/
greenground cable is longer than the other two.
In case of accidental disconnection this
precaution allows the ground cable to be
disconnected last.
Connect the power supply cable to the phase
connectors (L), to the neutral wire (N) of the
mains filter (FR), and to the air heater’s ground
terminal (see the wiring diagram). Use the
supplied 6.3 x 0.8 mm faston type terminals to
connect the phase and neutral wires.
Observe phase/neutral polarity, otherwise
the control equipment will generate a safety
shutdown. Verify that the system has been
grounded in compliance with the electrical
standards.
4.4.6 Remote-control panel (only for the WR
and WD versions to be ceiling installed)
The remote-control panel is equipped with a
probe for measuring the room temperature. Its
positionmustbechosennotonlyforeaseofuse,
butalsosoastoavoidaircurrents,heatsources,
and sources of excessive humidity which could
alter the temperature measurement.
Alsoavoidinstallingitinrecesses.Donotobstruct
the openings in the panel for the same reasons
asinthelastparagraph.However,itisadvisable
to install it at a height of approximately 1.5
meters from the ground.
To install it on the wall, use the two screw
anchors supplied with a diameter of 4 mm.
Unhook the rear part of the panel by using the
proper tools to release the four snap fasteners.
Maketwoholesinthewallwithacenterdistance
of 120 mm. Insert the screw anchors and attach
therearpart ofthepanel tothewall.Putthe front
part of the panel back by snapping it in place.
Ifyoushouldneedtoinsertthepanel’sconnection
cable inside trunking, you must disconnect the
cable from the terminal board on the panel.
When you have put the cable in place, re-
establishtheelectrical connectionbyputting the
cablein itsproper position onthe terminal board
(see the wiring diagram).
Ifyouneedtoinsertitintrunkingunderneath,the
cablecouldexitfromthewall incorrespondence
tothe hole in the rear part ofthepanel, so as not
to leave the cable in view. The original hole
whichthecableshouldhavepassedthroughmust
be closed with the plastic cap provided. If the
panelisattachedtoametalstructureorwall,this
structure or wall must be grounded.
4.4.7 Using a programmable timer
If you would like to have the air heater function
automatically at preset times, it is possible to
install a programmable timer.
A jumper for auxiliary connections (OP - seethe
wiringdiagram)isprovidedontheunit’selectrical
boardbetweentheJ14andJ15fastonconnectors
(4.8 x 0.8 mm type) of the terminal board on the
printed circuit. Remove the jumper and connect
the above connectors to the timer’s switch. Use
the bushing (fig. 1) for the connection cable’s
exit.
4.4.8 Connecting more than one unit with a
single external programmable timer
To operate several units with just one
programmabletimer followthe diagram infigure
21 and use the same J14 and J15 connectors
listed in the previous point. You have to use a
normally-open contact relay with an adequate
rating to make this special connection.
Fig. 21
J14
J15
n
2
1
n
2
1
J14
J15
J14
J15
2nd
airheater
1st
airheater nth
airheater
Timer
switch Relaywith
n contacts
Neutralwire
Phasewire
page 13
LEGEND OF THE COMPONENTS
WD version with ducts for ceiling installation
1 Bottom panel
2 Angular panel
3 Left panel
4 Air delivery frame
5 Air intake frame
6 Fan injector
7 Fan scroll
8 Fan support
9 Fan motor cradle
10 Fan motor
11 Fan motor attachment U-bolt
12 Centrifugal fan
13 Fan motor capacitor
14 Remote-control panel
15 Door to the controls (not used)
16 Pressure switch tubes
17 Burner control device
18 Printed electric circuit
19 Electrical board support
20 Pressure switch
21 RFI filter
22 Exchanger left support
23 Fan left support
24 Exchanger right support
25 Fan right support
26 Heat exchanger
27 Exchanger gaskets
28 Exchanger insulating gasket
29 Fan thermostat
30 Turbulator
31 Fluegas expellergasket
32 Flue gas expeller
33 Combustion chamber door
34 Door gasket
35 Combustion chamber
36 Burner
37 Burner bracket
38 Exchanger/combustion chamber gasket
39 Back plate/combustion chamber gasket
40 Electrodes
41 Gas injector
42 Intake gasket
43 Inner intake connector
44 Inner intake duct
45 Inner exhaust flue
46 Gas supply pipe
47 Gas pipe gasket
48 Gas solenoid valve
49 Attachment plate
50 Bushings
51 Back plate
52 Safety thermostat protection
53 Safety thermostat
54 Safety thermostat electric terminal board
55 Clamps for holding the ducts
56 Terminals
57 Exhaust flue
58 Intakeduct
59 Valverectifierbridge
page 24
thick.If your wallsare thicker, ductsthatare 100
cm long are available on request.
Mount the duct according to the procedure
described below:
a) Precisely measure the thickness of the wall
where the ducts are to pass through.
b) Ifnecessary,cut apieceoff both ductswhose
length is the difference between 40 cm and
the effective thickness of the wall (fig. 20).
Anycuts must be made on the ends opposite
the connection flanges. Make sure that they
arecut squarely andtrim offany burrs. NOTE:
The exhaust flue is the longer of the two.
It sticks out compared to the connection
flange.
c) Use the provided screws to attach the ducts
to the connectors on the unit’s rear. Make
sureto place the gaskets on the ductflanges.
d) Check that the flue gas exhaust pipe is
correctly inserted in the flue gas expeller fan
scroll and fasten it in place with the supplied
self-drilling screw.
4.4.3 Mounting the unit
Versions for ceiling installation (WR and WD)
WARNING! For your safety, due to the weight
of the unit and the possible difficulties of
installingit,it isadvisable to usea mechanical
hoisting device for positioning the air heater.
For these same reasons and also to avoid
damaging the unit itself, it is necessary for it
to be put into place by two people.
a) Use suitable means to raise the air heater to
itsposition and align the four fastening holes.
Tighten the anchoring points so that they are
safe and stable.
b) Place the exhaust and intake ducts near the
connectors on the unit until they are aligned.
Adjust the position of the metal connection
clampswith theirgaskets.Tightenthe clamps’
fastening screws and make sure that they
are correctly sealed.
c) Check that the outside terminals are in the
correct corresponding position (fig. 19) and
touch up the plastering around the holes
through which the ducts pass..
Version for wall installation (W)
WARNING! It is advisable to use two people
to raise the air heater and put it into position
so as to avoid any possible damage to the
wall or the unit.
a) Raise the air heater, insert the ducts in the
holes, and carefully push it towards the wall
until it comes into contact with it.
b) Adjust the position of the unit and attach it
with the screws to the screw anchors that
werepreviously inserted in the wall.Ifthe wall
is not perfectly straight, use spacers at the
pointswhere theattachmentsareto be made.
c) Check that the outside terminals are in the
correct corresponding position (fig. 20) and
touch up the plastering around the holes
throughwhich the ductspass.Attachthe wind
protection terminals to the outside ends of
the ducts by completely inserting them in
place and attaching them to the ducts by
means of the supplied self-drilling screws.
4.4.4 Gas connection
IMPORTANT! It is necessary to mount a gas
on-off valve upline from the unit. The valve
must be located in a position that can be
easily accessed by the user.
Connect the gas supply line to the air heater
whichis equipped with a G 1/2”A male threaded
connector.
Checkthe seal onthe gas pipingand make sure
thatitisinconformitywiththecurrentregulations
regarding gas systems.
4.4.5 Electrical connections
Ensure that a single-phase, 230 V, ~ 50 Hz
electric power supply is available.
The electrical system must be properly
isolated by means of an omnipolar circuit
breaker, whose contacts open by at least 3
Fig. 20
Intaketerminal
10 cm
2 cm Exhaust
terminal
EXHAUSTANDINTAKEDUCTS
W version for installation on the wall
page 14
Fig. 5
1.11 EXPLODED VIEW - W version for wall installation
page 23
also shown on the template. They can be
brought to these positions depending on the
type of system chosen.
b) Use the following procedure to remove the
right angular panel of the air heater casing:
Firstremovethetwofastening screws on the
front. Then use the tip of the screwdriver as
a lever to free the fastening springs on the
rear.
Free the left panel’s fastening springs in the
same way, by pulling sideways until they are
released.
4.4.2 Mounting the combustion air supply
intake duct and combustion product
exhaust flue
Versions for ceiling installation (WR and
WD): The air heater is equipped with a series of
ductsforwallsthatareupto40cmthick,assuming
that the unit’s rear is 20 cm from the wall. If the
walls are thicker, ducts that are 100 cm long are
availableon request.
Mount the duct according to the procedure
described below:
a) Measure the thickness of the wall where the
ducts are to pass through. Verify that the
ducts are long enough, according to what is
shown in fig. 19.
b) Any cuts must be made on the free ends
oppositethe wind protection terminals. Make
sure that they are cut squarely and trim off
any burrs. NOTE: The exhaust flue is the
longer of the two.
c) Insert the ducts into the pipes that were
previously installed in the wall. Install the
metal connection clamps with a silicone
gasket on the ducts’ free end without
tightening them. They will be connected to
the unit’s connectors.
If the ducts will not follow a straight path, you
need to request the necessary components,
such as 45° and 90° elbows, etc., from your
supplier.
IMPORTANT! If the exhaust duct is subject to
low temperatures, prevent the formation of
condensation by suitably insulating the duct
(for example, using insulation for
temperatures up to 200°C).
Version for wall installation (W): This type of
installation requires that the exhaust and air
intake ducts be installed on the unit before it is
attached to the wall. The air heater is equipped
withstandardductsforwallsthatareupto40cm
Fig. 19
Exhaustterminal
Intaketerminal
Connectionclamp
20 cm
2 cm
10 cm
EXHAUSTANDINTAKEDUCTS
WR and WD versions for installation on the ceiling
Sheathtube
installedinthewall
Wall
thickness
Fig. 18
PREPARATIONSFORINSTALLINGTHEAIR HEATER - Wversionforinstallationon the wall
page 15
LEGEND OF THE COMPONENTS
W version for wall installation
1 Front panel
2 Angular panel
3 Left panel
4 Air filter
5 Filter attachment knob
6 Casing crossbar
7 Adjustable grille blades
8 Right support for blades
9 Left support for blades
10 Rubber gasket for blades
11 Grille left support
12 Grille right support
13 Middle support for blades
14 Fan injector
15 Fan scroll
16 Fan support
17 Fan motor cradle
18 Fan motor
19 Fan motor attachment U-bolt
20 Centrifugal fan
21 Fan motor capacitor
22 Control panel
23 Control panel support
24 Control panel fastening bracket
25 Pressure switch tubes
26 Burner control device
27 Printed electric circuit
28 Electrical board support
29 Pressure switch
30 RFI filter
31 Exchanger left support
32 Fan left support
33 Exchanger right support
34 Fan right support
35 Heat exchanger
36 Exchanger gaskets
37 Exchanger insulating gasket
38 Fan thermostat
39 Agitator
40 Flue gas expeller gasket
41 Flue gas expeller
42 Combustion chamber door
43 Door gasket
44 Combustion chamber
45 Burner
46 Burner bracket
47 Exchanger/combustion chamber gasket
48 Back plate/combustion chamber gasket
49 Electrodes
50 Gas injector
51 Intake gasket
52 Intake connector
53 Gas supply pipe
54 Gas pipe gasket
55 Gas solenoid valve
56 Attachment plate
57 Bushings
58 Back plate
59 Safety thermostat protection
60 Safety thermostat
61 Safety thermostat electric terminal board
62 Terminals
63 Exhaust flue
64 Intake duct
65 Exhaust connector
66 Exhaustgasket
67 Valverectifierbridge
page 22
grillemustbeapplied,whichissuppliedonrequest
(fig. 16).
4.4INSTALLATION OPERATIONS
Setup thegas and electricitysupply linesbased
on the installation design.
4.4.1 Air heater mounting preparations
Versions for ceiling installation (WR and
WD): Once the unit’s position has been
determined, bend the supplied paper template
on the dashed line and apply it to the ceiling
with adhesive tape (fig. 17).
a) Indicate the position of the four holes to be
madefor installing theunitby means of screw
anchors or another system that is suitable
for the type of structure.
b) On the wall indicate the position of the two
holes that must go through the wall for the
exhaust and intake ducts. These holes must
be made as perpendicular as possible to the
wall with a core drill having a diameter of 70
mm (fig. 17).
The positions for the electric power supply
cable entrance and the gas delivery tube are
also shown on the template. They can be
brought to these positions depending on the
type of system chosen.
c) Cut a section of aluminum pipe with a
diameter of 70 mm that is equal to the
thickness of the wall. These segments must
then be installed in the wall as a sheath for
the ducts.
d) Use the following procedure to remove the
right angular panel of the air heater casing:
Firstremovethe two fastening screws on the
front. Then use the tip of the screwdriver as
a lever to free the fastening springs on the
rear. Free the left panel’s fastening springs
in the same way, by pulling sideways until
they are released.
Version for wall installation (W): Once the
unit’s position has been determined, bend the
supplied paper template on the dashed line and
apply it to the wall with adhesive tape (fig.18)
a) Indicate the position of the holes to be made
(Four holes for installing the unit by means
of screw anchors, and two holes that go
through the wall for the exhaust and intake
ducts. These holes must be made as
perpendicular as possible to the wall with a
core drill having a diameter of 70 mm).
The positions for the electric power supply
cable entrance and the gas delivery tube are
Fig. 16
TERMINALPROTECTIONGRILLE
Grille
Fig. 17
PREPARATIONSFORINSTALLINGTHEAIRHEATER-WRandWDversionsforinstallationontheceiling
page 16
Fig. 6
1.12 WIRING DIAGRAM
Legend of the wire colors
a=orange
b= blue
bi = white
g= yellow
g/v = yellow / green
gr = grey
m= brown
n= black
r= red
ve = green
Legend for fans speed
W and WR 8
Max. speed = black
Min. speed = grey
W and WR 10
Max. speed = brown
Min.speed = black
WD 8
Max. speed = 3
Min.speed = 4
WD 10
Max. speed = 1
Min.speed = 2
Ac = Controlequipment
Br = Burner
Com = Remote-control panel terminal board
Cs = Printed circuit
Ea = Ignition electrodes
Ef = Flue gas expeller motor
Er = Flame detection electrode
Ev = Gas solenoid valve
Fr = Noise filter
Mv = Fan motor
Op = Jumper for auxiliary connections
P= Differentialpressureswitch
Ts = Safety thermostat
Tv = Fan thermostat
= Fuse
Important:
- Install a disconnection device upline with contact
opening of at least 3 mm.
- Respect the phase-neutral polarity when connecting
the 230 V, ~ 50 Hz, single-phase power supply.
J15
J14
J13
J12
J11
J10
J 9
J 8
J 7
J 6
J 5
J 4
J 3
J 2
J 1
J25
J26
J27
J28
J29
J30
J31
J32
J33
J34
J35
J36
N
L
J23
J24
L N 1a N 1a N
J1 J2
L N
SB RS
J3 N 1a
PEf
NONC
C
Ts
Br
Ea Er
Ev
Ac
K3 K1 K2
Tv
L
N
SB
RS
J22
J21
J20
J19
J18
J17
J16
3(U)
1(U)
(4)
(2)
Fr
N
L
230 V ~
50 Hz
Op
Cs
b =common
max.speed
min.speed
Mv
agvegrmbnbi r
1245678910
Com
gan rgrbi vebm
9
b =common
n=max.speed
m=min.speed
0
1
2
3
4
5
6
Mv
Variant connection
engine WD
page 21
to the standard configuration, you should
request them from ACCORRONI S.r.l.
In any case, any increases to the length of the
ducts must respect the limits specified in the
next point.
4.2.2 Duct length limits
If the duct passes directly through an outside
wallthatis morethan40cmthick, anintakeand/
or exhaust duct with a diameter of 60 mm that is
1meter long can be supplied upon request. The
length of the ducts must not exceed the limit of
6 meters, considered as the sum of the lengths
of both ducts (for example, 3 m of intake duct +
3mofexhaustduct,etc.),otherwisetheresulting
pressure drop may not allow the unit to function
properly,thustriggeringthedifferentialpressure
switch.
It should be remembered that an elbow in the
duct is the equivalent of a straight segment
of approximately 50 cm.
4.3 OUTSIDE POSITIONING OF THE FLUE
GAS EXHAUST TERMINAL
The position of the outside exhaust terminal for
combustion products with respect to windows,
ventilationopenings,etc. mustbein compliance
with the requirements of current applicable
regulations.
If the air heater is installed in rooms on the
groundfloor and the exhaust faces sidewalks at
the level of pedestrians, a special protection
Fig. 13
POSITION (WR and WD)
min. 20 cm
Duct
Outsideairintake
WD
WR
Fig. 14
POSITION(W)
min.20 cm
Fig. 15
DEFINITIONOF“TYPE”INTHEREGULATIONS
Example showing the WR version - viewed from above
Type C52 -Outside airintakeand fluegas
exhaust terminals that are not close
together. They may even be on different
walls of the building.
Type C12 -Outside airintakeand fluegas
exhaustterminalsthatareclosetogether.
page 17
2. CONTROL AND SAFETY DEVICES
2.1 GAS CONTROLLER
This device is housed in a heat-resistant and
shockproofplastic enclosure and ismountedon
the air heater electric board (fig. 7). The control
deviceoperatesontheionisationflamedetection
principle, using a special probe on the burner.
The detection circuit must be fed with single-
phase 230 V ~ 50 Hz mains voltage. The
circuit is sensitive to the phase-neutral
polarity. If this is reversed, the device will
lock out within the safety time, even if the
flame has a regular shape.
2.2 GAS VALVE
The gas valve includes two, direct operation
solenoid valves with class B closing devices
(maximum pressure 50 mbar) and a pressure
regulator. The die-cast aluminium casing is
equipped with 3/8 RP threaded gas inlet and
outlet connections and two inlet and outlet
pressure test points. The gas valve is also
equipped with an inlet filter (fig. 8).
2.3 DIFFERENTIAL PRESSURE SWITCH
The purpose of this device is to interrupt the
burner’sfunctioning if the flue gas expeller fan’s
capacityis insufficient due to a problem with the
fan or due to the obstruction of the combustion
circuit.
The pressure switch is mounted on the
generator’s electrical board and is connected to
apressureintake onthe exchangerby meansof
asiliconetubesothatitcanmeasurethepressure
differentialin the combustion circuit. There is an
Fig. 7
CONTROLEQUIPMENT
Fig. 9
Sealedadjustmentscrew
DIFFERENTIALPRESSURESWITCH
Fig.10
FANTHERMOSTAT
Threadedfastener
Electrical connection
Fig. 8
GASUNIT
page 20
room. The air flow must not be obstructed by
objects such as internal dividers, shelves,
furniture, or drapes.
f) For air delivery via ducts (WD):
The selected position must permit the ducts
tofollowarationalpathwhichkeepspressure
drops to a minimum and allows the ducts to
be inspected.
4.1.1 Versions for ceiling installation
(WR and WD)
The unit must be installed only in a horizontal
position. For the WR version make sure that
there is a distance of approximately 20 cm
between the rear part of the unit and the wall so
as to permit correct air intake and to allow the
filter to easily be removed for cleaning (fig. 13).
FortheWD versionmake surethattheairintake
system (dampers, plenum systems, ducts, etc.)
is accessible and functional.
IMPORTANT!Verifythat thecarrying capacity
of the surface on which the unit is to be
mounted and this surface’s material are
suitable for supporting the weight of the unit.
Make sure that the materials used to attach
the unit guarantee its lasting stability.
4.1.2 Version to be installed on the wall (W)
The unit should be placed on the wall with its
lowerside at least 20 cm above the floor to allow
proper air intake. It the unit is to be installed
undera window or under a shelf, make sure that
the window sill or the shelf does not obstruct
the air flow (fig.14).
4.2 AIRINTAKEAND FLUE EXHAUSTDUCTS
WARNING! The material used to build the
externalwall and anycovering (wood,plastic)
must not be sensitive to the heat generated
by the flue gas exhaust duct. If it is heat
sensitive,thepassage holemustbe protected
with insulation that insulates the wall or the
covering.
4.2.1 Type definition
As already mentioned in point 1.1, the W, WR,
andWDairheaterscanbeinstalledwithdifferent
configurations of the air intake and combustion
product exhaust ducts and these different
solutions constitute the definition of “type”
according to the current standards (fig.15):
- Type C12
The combustion circuit is sealed with respect to
the room in which the air heater is installed. The
intake and exhaust ducts pass directly through
the room’s outside wall; their terminals are near
each other.
- Type C52
The combustion circuit is sealed with respect to
theenvironmentinwhichtheairheaterisinstalled.
The ducts are both connected to the outdoors,
but their terminals need not be adjacent to each
other.
IMPORTANT! in both these instances the
exhaust and intake ducts, including their
accessories, are considered to be integral
parts of the air heater by current regulations.
Therefore,if you wishto addany components
Fig. 12
60 cm
30 cm
30 cm
60 cm
max. 3 m
MINIMUMDISTANCESFORMAINTENANCE
INSTALLATION
ONTHE WALL
Viewfromabove
INSTALLATIONONTHECEILING-Frontview
page 18
adjustmentscrewonitsfrontforcalibratingit;this
operationisperformedatthefactoryaccordingto
the unit model and then the screw is sealed (fig.
9).
2.4 FAN THERMOSTAT
Thisthermostatcontrolsfanoperation,makingit
startwhen the exchangerhas reached therated
operating temperature and stopping it when the
exchangerhasadequatelycooled.Thethermostat
isattachedtoathreadedsupport,locatedonthe
exchanger (fig.10).
2.5 SAFETY THERMOSTAT
The thermostat is designed to interrupt burner
operation when the air temperature in the air
heater reaches a set value, i.e. when the
exchanger overheats due to insufficient air flow
or a fan malfunction. The thermostat enclosure
uses a special support to attach to the front
shield of the appliance (fig. 11).
Fig.11
Thermostat
SAFETYTHERMOSTAT
Electrical
connection
page 19
SECTION 2 - TECHNICAL INFORMATION FOR THE INSTALLER
3. IMPORTANT INFORMATION
3.1 QUALIFICATIONS OF THE INSTALLER
IMPORTANT!Current laws require that these
unitsbe installed by specialized personnel in
possession of the proper technical and
professional qualifications. The installer is
required to issue a compliance certificate to
the user which certifies that the system was
installedcorrectly incompliance with current
regulations.
3.2 RELATED DOCUMENTS
Notwithstanding their limited scope, the
appliances should be installed in accordance
with the relevant provisions of the following
regulations:
UNITED KINGDOM
Gas Safety (Installation and Use) Regulations
1984 and BS 6891: 1988. Due account should
be taken of any obligations arising from the
Health and Safety at Work etc Act 1974, the
current Building Regulations, the current I.E.E.
Regulationsandotherrelevantcodesofpractice.
IRELAND
I.S.3212: 1987, ICP 4, I.S.327. Due account
should be taken of any obligations arising from
the current Building Regulations, the current
I.E.E. Regulations and other relevant codes of
practice.
3.3 TRANSPORT AND HANDLING
Theairheaterissuppliedwithstandardcardboard
packing with two polystyrene foam shells. The
packed appliance can be handled by hand or
with a fork-lift truck, making sure to observe the
instructionsreportedonthe boxindicated bythe
special graphic symbols.
When delivered, check that no visible damage
on the packing and/or on the appliance has
occurred during transport. If damage is noted,
immediatelysubmitaclaimtotheshippingagent.
Donotdamage thepaperinstallation template
when removing the air heater from the
packing. You will need to use it to make the
holes in the room’s wall.
Check that the packing includes the appliance
butalso allthe partsindicated inpoint 1.5.Place
the material and the documents in a protected
area.
3.4 DATA CHECK
Check that the heater and its technical
characteristics match what is indicated by the
drawings or other documents.
The type of gas for which the heater has been
designed and the supply pressure are found
on the exterior of the packing and on a
special label located on the inside of the
appliance.
WARNING! If the type gas for which the
appliance has been designed is different
from the one being used, the conversion
operation must be carried out by skilled
technical personnel.
3.5 USING THE INSTRUCTIONS
WARNING! When installing or working on
theappliance,comply withallthe instructions
given in this manual. Changes to any type of
connection and non-compliance with these
instructions will immediately invalidate the
warranty and release the manufacturer from
all responsibilities.
4. INSTALLATION
4.1 POSITIONING INSTRUCTIONS
Before carrying out any installation operations,
make sure that the following conditions are
satisfied regarding the position where the air
heater will be installed:
a) itmust be possible to provide a gas supply to
the selected point as well as a single-phase
230 Volts ~ 50 Hz power supply line.
b) It must be possible to make the connections
to the combustion air supply duct and
combustion product exhaust flue within the
specified limits.
c) The combustion product exhaust terminal’s
position outside must be in compliance with
current regulations.
d) The unit’s installation position must allow
access to the parts of the unit subject to
maintenance. It is advisable to respect the
distances indicated in figure 12.
e) For direct air delivery (W and WR):
The selected position for the unit must be
suitable to correctly distribute the air in the
This manual suits for next models
2
Table of contents
Popular Gas Heater manuals by other brands
DeDietrich
DeDietrich SCB-10 technical information
Desa
Desa VGL18NRA OWNER'S OPERATION AND INSTALLATION MANUAL
Vermont Castings
Vermont Castings VCBV10TN Operation and installation manual
LIFESTYLE APPLIANCES
LIFESTYLE APPLIANCES 505-117 user manual
Dickinson
Dickinson Newport - P9000 Operating and installation instruction
Braemar
Braemar TE Series Homeowner's guide
Delta Performance
Delta Performance PG PLUS-25 Installation and maintenance manual
american flame
american flame AFVK-SP-SPLIT Installation and operating instruction
Vantage Hearth
Vantage Hearth VUL24ND OWNER'S OPERATION AND INSTALLATION MANUAL
White Mountain Hearth
White Mountain Hearth LS-16C-2 Installation instructions and owner's manua
Desa
Desa GVB35N OWNER'S OPERATION AND INSTALLATION MANUAL
Ravanson
Ravanson LD-168N user manual