Robur E 42 Owner's manual

INDEX
SECTION 1 GENERAL SECTION..................................................................................................2
1.1 GENERAL WARNINGS......................................................................................................2
1.2 OVERVIEW OF OPERATION OF THE APPLIANCE.........................................................3
1.3 TECHNICAL DATA ............................................................................................................5
1.4 DIMENSIONS.....................................................................................................................6
SECTION 2 FOR THE USER............................................................................................................7
2.1 SWITCHING THE APPLIANCE ON AND OFF ..................................................................7
2.2 MAINTENANCE..................................................................................................................8
2.3 ASSISTANCE.....................................................................................................................9
SECTION 3 FOR THE INSTALLATION TECHNICIAN............................................................10
3.1 BUILD CHARACTERISTICS..............................................................................................10
3.2 CONTROL AND SAFETY COMPONENTS........................................................................10
3.3 INSTALLATION ..................................................................................................................11
3.3.1 GENERAL NORMS FOR INSTALLATION OF THE APPLIANCE.....................................11
3.3.2 ELECTRICAL CONNECTIONS..........................................................................................12
3.3.3 SIZING AND INSTALLATION OF COMBUSTION AIR AND EXHAUST GAS PIPES.......14
3.3.4 WALL INSTALLATION .......................................................................................................18
3.3.5 PROCEDURE FOR CHECKING & ADJUSTING CALIBRATION OF THE
NOVAMIX VALVE SIT 822.................................................................................................19
3.3.6 GAS CHANGE....................................................................................................................21
3.3.7 FUNCTIONAL WIRING DIAGRAM.....................................................................................22
3.3.8 ASSEMBLY WIRING DIAGRAM........................................................................................23
3.3.9 WIRING DIAGRAMS FOR THE INSTALLATION OF SEVERAL HEATERS.....................24
3.4 SERVICE............................................................................................................................25
3.4.1 POSSIBLE OPERATING ANOMALIES..............................................................................25
26
3.5 LIST OF ACCESSORIES...................................................................................................27
3.5.1 CONTROL UNITS...............................................................................................................27
3.5.2 MOUNTING BRACKETS....................................................................................................28
3.5.3 OTHER ACCESSORIES ....................................................................................................29
Please read the warnings contained in this manual; they give important instructions regarding safe
installation, operation and maintenance of the appliance. Keep this manual safe for all further
consultation.
The manufacturer may not be held responsible for any damage arising from improper, incorrect or
unreasonable use of the appliance.
NOTE

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1 GENERAL SECTION
1.1 GENERAL WARNINGS
This manual forms an integral and essential part of the product and must be delivered to the user as such.
This appliance must be used only for the purposes for which it has been expressly designed. All other uses
are considered inappropriate and therefore dangerous.
The manufacturer does not accept any contractual or extracontractual liability for damage caused by errors in
installation or use and in any case by failure to observe the instructions supplied by the manufacturer.
Do not obstruct the inlet vent of the fan or the outlet grille.
In the case of failure and/or poor operation of the appliance, deactivate it (disconnect the power supply and
close the gas valve), and refrain from any attempt to repair or intervene directly upon the appliance.
Contact only professionally qualified personnel.
Professionally qualified personnel means personnel that have specific technical expertise in the sector of
heating plant components for civil use. In any case the user may obtain all necessary information by
contacting ROBUR S.p.A.’s Customer Service Department (tel. [phone]).
Any product repairs must only be carried out by a Technical Assistance Centre authorised by the
manufacturer, and using only genuine parts.
Failure to observe the instructions above may compromise the safety of the appliance.
To guarantee the efficiency and correct operation of the appliance it is essential to have annual maintenance
carried out by professionally qualified personnel, observing the manufacturer’s instructions.
If the appliance is sold or transferred to a different owner, ensure that this manual accompanies the appliance
so that so that it may be consulted by the new owner and/or installation technician.
Have professionally qualified personnel check that:
•the electricity and gas supply network data correspond to the data on the plate
•the exhaust air duct and combustion air intake are functioning correctly
•combustion air is supplied and exhaust fumes are discharged correctly, in accordance with current
norms
•the fuel supply piping is correctly sealed internally and externally
•the rate of fuel supply is adjusted in accordance with the power demanded by the heater
•the appliance is supplied with the type of fuel for which it is designed
•the fuel supply pressure is within the ranges indicated on the data plate
•the fuel supply plant is sized for the flow required by the heater and that it is equipped with all the safety
and control devices required by current norms
Do not use gas pipes to earth electrical appliances.
Do not leave the heater connected to the power supply unnecessarily when it is not used for a long period of
time, and close the gas valve.
•do not use electrical switches, telephones or any other object or device that can cause sparks
•open doors and windows in order to create an air current to ventilate the room
•close the gas valves
•contact professionally qualified personnel for assistance
IF YOU SMELL GAS …
BEFORE STARTING THE APPLIANCE

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1.2 OVERVIEW OF OPERATION OF THE APPLIANCE
The warm air heaters in the Evoluzione range are independent heating appliances of the sealed circuit and
forced draught type.
They have been designed to be installed inside the room to be heated.
They may be set up to run on natural gas (G20) and L.P.G. (G30/G31) (the appliance belongs to category
II2H3B/P in accordance with the EN 1020 norm).
The combustion circuit is sealed off from the environment to be heated and complies with the requirements of
norm EN 1020 for type C appliances: intake of combustion air and outlet of exhaust gases occur outside and
are ensured by the operation of a blower which is located in the combustion circuit. The appliances are
approved also as type B appliances for installations where combustion air intake is permitted directly from the
room to be heated.
The operation of the heater is controlled by an ambient thermostat (not supplied as standard). When the
thermostat is activated, the electronic control unit, after a pre-wash time of about 30 seconds, ignites the
burner.
An electrode detects when ignition has occurred. If there is no flame, the electronic control unit halts operation
of the appliance.
A green ON light located on the right-hand side of the appliance indicates that ignition of the burner has
occurred (see item 5, Figure 2).
The combustion products pass through the heat exchangers internally. The heat exchangers receive the
current of air produced by the helicoidal fan, thus introducing warm air into the room.
The direction of the airflow can be adjusted up or down and/or from side to side by applying on the inlet grille
the (optional) adjustable fins (see “List of accessories” on page 27).
The helicoidal fan starts automatically only when it receives the command from the ventilation thermostat, that
is, only when the exchangers are warm, in order to prevent cold air from being introduced into the room.
Likewise, it stops when the exchangers are cold.
If the heat exchangers should overheat, because of abnormal operation, a limit thermostat is fitted which, if
required, cuts off power to the gas valve, which in turn cuts off the flow of fuel and makes the burner switch off.
Resetting the limit thermostat is an operation for professionally qualified personnel only, which restores
operation of the appliance after having identified the cause of overheating.
Upstream from the burner, a blower ensures the correct air-gas mixture and the forced expulsion to the
outside of the exhaust fumes deriving from combustion.
If the inlet or exhaust pipes are obstructed, or if the blower is operating inefficiently, the differential “air-gas
valve” control system interrupts the flow of combustion air to the burner.
The diagram in Figure 1 summarises winter operation of the heater.
The heating output and ventilation of the Evoluzione warm air heater are modulating: they can be reduced by
approximately 20% (see “TECHNICAL DATA” on page 5).
Operation on reduced power and ventilation allow ambient temperature to be kept constant, reducing gas
consumption and further lowering noise emissions into the environment.
Operation with automatic or manual modulation depends on the type of control units chosen (for further
information, see the paragraph “Other accessories” on page 29).
In the summer period, it is possible to operate the fan only, producing a pleasant movement of indoor air (for
further information see Section “For the User”, paragraph entitled “Summer”).
NOTE

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Figure 1 – DIAGRAM FOR WINTER OPERATION
Ambient thermostat
closes contact
Blower switches on
After 30 seconds of pre-
wash the electronic
control unit opens the
valve: the green
operation light and the
blower switch on
The detector electrode
determines whether
there is a flame
The combustion
products pass through
the exchangers
internally
The blower ensures
that combustion
products are forcibly
expelled
The differential “air-
gas” valve control
system for combustion
air flow checks that the
blower is functioning
correctly
When the exchangers
are hot, the fan,
controlled by the
ventilation thermostat,
comes on
The flow of air
produced by the fan
strikes the exchangers
externally and is
heated
Have the exchangers
overheated?
The heater works until
the ambient
temperature is reached
The limit thermostat
interrupts the operation
of the burner
Identify cause of
stoppage and reset
heate
r
Arrest
YES
NO
NO
YES

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1.3 TECHNICAL DATA
MODEL U.M. E 32 E 42 E 43 E 52 E 72
CATEGORY OF APPLIANCE II2H3B/P
TYPE OF APPLIANCE C13 - C33 - B23 - C53 - C63
GAS TYPE NATURAL GAS - L.P.G.
NOMINAL HEAT INPUT (AT Ist SPEED) kW 26 34.75 37.15 48.35 69
kcal/h 22360 29890 31950 41580 59340
NOMINAL HEAT OUTPUT (AT Ist SPEED) kW 24.2 32 34.2 44.5 62.8
kcal/h 20790 27520 29410 38270 54010
REDUCED HEAT INPUT (AT 2nd SPEED) kW 20.8 27.8 29.8 38.7 55.2
kcal/h 17900 23910 25630 33280 47470
REDUCED HEAT OUTPUT (AT 2nd SPEED) KW 19.35 25.6 27.4 35.6 50.25
kcal/h 16640 22020 23560 30610 43210
NOMINAL EFFICIENCY % 93 92 92 92 91
AIR FLOW RATE AT Ist SPEED 2300 2900 3400 4200 6000
AT 2nd SPEED m3/h 1900 2500 2700 3400 5100
THERMAL HEAD AT Ist SPEED 31.2 32.5 29.4 31.0 31.0
AT 2nd SPEED K 30.2 30.0 29.8 30.7 29.2
NOMINAL GAS CONSUMPTION NATURAL GAS m3/h 2.75 3.68 3.93 5.11 7.30
(15°C - 1013 mbar) L.P.G. G30 2.05 2.74 2.93 3.81 5.44
L.P.G. G31
kg/h 2.01 2.69 2.90 3.74 5.34
REDUCED GAS CONSUMPTION NATURAL GAS m3/h 2.20 2.94 3.15 4.09 5.84
(15°C - 1013 mbar) L.P.G. G30 1.64 2.19 2.34 3.05 4.35
L.P.G. G31
kg/h 1.61 2.15 2.30 2.99 4.28
FUEL SUPPLY PRESSURE NATURAL GAS 20
L.P.G. G30
30
L.P.G. G31
mbar
30
GAS INLET DIAMETER ” 3/4
PIPE DIAMETER INTAKE
EXHAUST
mm 80
ELECTRICITY SUPPLY VOLTAGE 230V - 50Hz
INSTALLED ELECTRICAL POWER W 250 300 350 420 800
FUSE A 4
AIR THROW AT 1st SPEED
(RESIDUAL SPEED >1m/s) m 14 18 20 22 26
SOUND PRESSURE AT 6 m (Ist SPEED)
IN FREE-FIELD CONDITIONS dB(A) 38 39 40 42 43
IN TYPICAL INSTALLATION dB(A) 48 51 52 56 57
SOUND PRESSURE AT 6 m (2nd SPEED)
IN TYPICAL INSTALLATION dB(A) 45 46 47 51 54
WEIGHT kg 60 66 66 74 86
Table 1 – TECHNICAL DATA, EVOLUZIONE SERIES

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1.4 DIMENSIONS
1 EXHAUST OUTLET E32 E42/43 E52 E72
2 COMBUSTION AIR INTAKE A 474 591 709 944
3 POWER SUPPLY SOCKET B 755 872 990 1225
4 CONNECTION C 418 477 536 --
5 ON LIGHT D 460 520 520 460
6 PASSTHROUGH HOLE FOR E 197 256 315 432
MANOMETER TUBE
Figure 2 – DIMENSIONS
835
165
535
400 15
615 220
5
SIDE VIEW
26
777
26
829
130
B
290
=
A
=
FRONT VIEW
472
238,5
= =
120
80 80
290
12
EE
TOP VIEW
400 15
155
142
146
441 465
4
3
6
REAR VIEW E 72
597
411
460
C
146
142
3
4
6
REAR VIEW E 32/42/43/52
D
465
411
597

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2 FOR THE USER
2.1 SWITCHING THE APPLIANCE ON AND OFF
The first switching on of the appliance must be carried out by professionally qualified personnel.
Before starting the heater, have professionally qualified personnel check that:
•the data on the plate correspond to the data from the electricity and gas supply grids
•the calibration is compatible with the power of the heater
•the exhaust gas pipe is operating correctly
•the intake of combustion air and outlet of exhaust gases occur correctly in accordance with the
specifications of current legislation
WINTER
1. Set the index of the ambient thermostat to maximum.
2. Check that the gas valve is open.
3. Supply current to the appliance by closing the omnipolar switch (provided by the electrical installation
technician).
4. Set the summer/winter switch to the winter position (indicated by the snowflake symbol ).
5. After a pre-wash time of approximately 30 seconds, the gas electrovalve opens and the burner switches
on.
6. When a flame is present, the central control unit keeps the gas valve open.
7. If no flame is present, the central control unit arrests operation of the appliance, and the arrest light
illuminates on the reset button.
8. If point 7 applies, press the reset button.
9. If ignition is trouble-free, set the ambient thermostat index (not supplied as standard) to the value desired.
If the appliance is switched on after a long period of disuse, or the first time the appliance is switched on, it
may be necessary to repeat the operation several times, due to air being present in the gas pipes.
SWITCHING OFF
To switch off the appliance, set the ambient thermostat index to the minimum. The burner will switch off, while
the fans will continue to operate until the appliance has fully cooled.
If the appliance is not used for a protracted period, after the operation described above and after waiting for
the fans to cease operating, close the gas valve and cut off electrical current to the appliance via the
omnipolar switch located on the power supply line.
In no circumstances must the appliance be switched off by removing the power supply from it directly. This
can damage the appliance, as it causes the fans to stop immediately and the limit thermostat to be activated,
which must be reset manually.
WARNING
WARNING
WARNING
WARNING

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SUMMER
1. Close the gas valve and check that electrical current reaches the appliance.
2. Set the summer/winter switch to the summer position (indicated by the sun symbol ); set thus, only the
fans will operate.
SEASONAL ARREST
1. Switch off the appliance and wait for the fans to stop.
2. Close the gas valve upstream of the appliance.
3. If the SUMMER function is not to be used, remove electrical power from the appliance by means of the
omnipolar switch located on the power line.
RESET OF THE LIMIT THERMOSTAT
The limit thermostat stops the burner if the appliance
becomes too hot. Reset is carried out by pressing the
button on the rear of the appliance, after having removed
the protective cap (see Figure 3). Replace the protective
cap after resetting the thermostat.
Figure 3 –LIMIT THERMOSTAT RESET BUTTON POSITION
Activation of the limit thermostat ALWAYS indicates an abnormal condition.
For this reason, reset of the limit thermostat is a task for professionally qualified personnel, who will restore
operation of the appliance ONLY after identifying the cause of overheating.
2.2 MAINTENANCE
Careful maintenance is always at the basis of economy and safety.
The maintenance of heating plants must be carried out on an annual basis, preferably at the beginning of the
winter season, by professionally qualified personnel.
For prolonged, trouble-free operation, we recommend a general cleaning of the appliance (paying particular
attention to the heat exchangers and the fan grilles) and carrying out combustion tests in accordance with
specific regulations.
WARNING
RESET BUTTON
LIMIT THERMOSTAT

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2.3 ASSISTANCE
Always entrust professionally qualified personnel with all reinstallation, activation, maintenance, gas
change, and other operations.
For this reason, ROBUR S.p.A. has a network of Technical Assistance Centres that can be contacted via the
dealer, the area representative, or by calling ROBUR S.p.A.'s Customer Assistance directly on 035/888111.
Before calling Customer Assistance, make sure that you have the machine documentation to hand and, if
possible:
- the registration number and model of the product, which may be found on the data plate and on the
guarantee card
- a description - even if only brief - of the type of installation
WARNING

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A
C
B
3 FOR THE INSTALLATION TECHNICIAN
3.1 BUILD CHARACTERISTICS
- premixed burner in stainless steel
- high head blower
- cylindrical combustion chamber in stainless steel
- ROBUR-patented
heat exchanger, manufactured in special light alloy, with horizontal fins on the air side
and vertical fins on the exhaust gas side, with extremely high heat exchange capacity
- external panelling manufactured in painted steel and anodised aluminium
- two-speed axial fan
The Evoluzione heater is manufactured in compliance with the norms currently in force as applied to gas
appliances and electromagnetic emissions.
3.2 CONTROL AND SAFETY COMPONENTS
- manually resettable 100°C limit thermostat, providing protection against overheating of the heat
exchangers.
- differential “air-gas valve” control system for combustion airflow. If the air intake or exhaust outlet
pipes are obstructed, this safety system is activated, bringing about the arrest of the appliance.
- Gas electrovalve: if a safety device is activated (limit thermostat, central control unit, etc.) the gas valve
is de-energised electrically, with the consequent interruption of gas flow to the burner.
•Power supply: 230 V - 50 Hz
•Operating temperature range: 0°C to +60°C
- central ignition and flame control unit which takes care of the operation of igniting the premixed burner
and detecting the flame; if a flame is not detected within the safety time, the electronic control unit arrests
the machine, which must be restarted manually.
•Safety time: 5 seconds
•Pre-wash time: 30 seconds
•Power supply: 230 V - 50 Hz
Figure 4
A) central flame control unit
B) transformer
C) relay

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3.3 INSTALLATION
3.3.1 GENERAL NORMS FOR INSTALLATION OF THE APPLIANCE
•Installation must be carried out be professionally qualified personnel, following the manufacturer’s
instructions.
•Professionally qualified personnel means personnel that have specific technical expertise in the sector of
components of heating plants. In any case you may obtain any information that you may require by
calling ROBUR S.p.A.’s Pre-sales Office on 035/888111.
•Erroneous installation may cause damage to persons, animals or things. The manufacturer may not be
held responsible for such damage.
•Installation must be carried out in compliance with current national and local norms.
For installation purposes, the following regulations should be respected:
- The minimum distance of the appliance from the wall behind it should be enough to allow adequate air
renewal (at least 350 mm). The minimum distance from the side walls is indicated in Figure 5.
- The optimum height recommended from the ground to the base of the heater is 2.5 – 3.5 m (see Figure 5).
The heater must NOT be installed at heights of less than 1.8 m from the ground (for models E 32 and E
42), or 2.5 m (for models E 43, E 52 and E 72).
- To obtain maximum comfort and performance from the plant, we recommend that the following rules are
observed:
•make sure that the flow of air from the appliance does not strike workers directly
•take into account the presence of obstacles (pillars and suchlike).
•for better heat distribution, if several machines are installed, create alternating flows of warm air (see
Figure 6).
•in such cases it may also be a good idea to position the appliances near main doors so that they
perform the additional function of creating an “air barrier” at the moment these doors are opened.
- Do not install Evoluzione series heaters in greenhouses or environments with a high degree of humidity or
other such climatic conditions, as they have not been designed for this type of use.
On the basis of the installation plan, set up the gas and electricity supply lines, as well as the holes for exhaust
gas outlet and combustion air intake (together with the mounting brackets, ROBUR supplies an “installation
template” on which the layout of the holes has been reproduced).
A) Unpack the appliance, taking care to check that it has not been damaged during transport; each appliance
is tested in the factory before being dispatched. Therefore, damage has occurred, tell the transporter
immediately.
B) Fit the mounting brackets, chosen from the three available types (for further information see the paragraph
entitled “Wall installation” on page 18), following the instructions supplied with the accessory.
C) Fix the heater to the bracket, using the screws supplied with the bracket.
D) On the gas supply pipe, provide a gas shut-off valve and a three-piece joint.
E) Check that an adequate gas distribution network exists. In particular, if the appliance is fuelled by:
Natural gas
Make sure that the gas supply pressure from the distribution network, when the appliance is in operation,
is set to the value of 20 mbar (204 mm H2O) (with a tolerance from 17 mbar to 25 mbar).
L.P.G. (Propane-Butane mix)
It is essential to fit a first-stage pressure reducer in proximity to the liquid gas tank to reduce pressure to
1.5 bar, and a second-stage pressure reducer for a further reduction from 1.5 bar to 30 mbar (306 mm
H2O) in proximity to the heater (with a tolerance from 20 mbar to 35 mbar).
L.P.G. (pure Propane)
It is essential to fit a first-stage pressure reducer in proximity to the liquid gas tank to reduce pressure to
1.5 bar, and a second-stage pressure reducer for a further reduction from 1.5 bar to 30 mbar (306 mm
H2O) in proximity to the heater (with a tolerance from 25 mbar to 35 mbar).
WARNINGS

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If you are not sure what composition of L.P.G. is used, assume that it is a Propane-Butane mix and act
accordingly.
3.3.2 ELECTRICAL CONNECTIONS
A) Connect the appliance electrically using the socket supplied as standard and a type H05 VVF 3x1.5 mm2
cable, with a maximum external diameter of 8.4 mm. For this operation, ensure that:
- power grid data corresponds to the data on the machine data plate (230 V/50 Hz single phase).
- when the connection is made, the ground wire is kept longer than the live wire, so that it will be the last
cable to be pulled out if the power supply cable is accidentally pulled out, thus ensuring that it remains
grounded.
Electrical safety of the appliance is achieved only when it is correctly connected to an efficiently grounding
system, created in accordance with current safety legislation. Do not use gas pipes to ground electrical
equipment.
B) Provide a bipolar switch on the power supply line with minimum contact clearance of 3 mm. “Bipolar”
means that it may be opened on both phase and neutral. This means that when it is opened, both contacts
are open.
C) The installation of an ambient thermostat is obligatory, whenever the control used does not provide it.
The thermostat must be connected to the appliance as shown in the electrical assembly diagram (see
Figure 22 on page 23). We recommend that the thermostat (or its sensor) is positioned approximately 1.5
m from the floor, away from draughts or direct sunlight and other direct heating sources (lights, warm flows
of air from the appliance itself, etc.) and, if possible, NOT on outside-facing walls, so as not to give false
temperature readings and therefore compromise operation of the plant. IN THIS WAY, UNDESIRED
SWITCHING ON AND OFF OF THE PLANT WILL BE AVOIDED AND OPTIMAL COMFORT WILL E
ENSURED IN THE ROOM.
In addition to the ambient thermostat it is necessary to install one of the control units that ROBUR supplies
as optional accessories (for further information, see the paragraph entitled “List of accessories” on page
27.)
Control cables (in particular those connected to the control units and temperature sensors) must be
protected from interference created by power cables. Such protection may be obtained, for example,
either by shielding the cables or by laying them in separate channels from the power cables.
D) If it is not intended to use one of these accessories, it is nonetheless necessary to install, as well as the
thermostat:
- 1 switch to control summer/winter operation of the heater, to connect to poles 1, 2 and 3 of the
terminal board (see electrical assembly diagram on page 23)
- 1 switch to control operation at maximum and reduced power, to connect to poles 8 and 3 of the
terminal board (see electrical assembly diagram on page 23)
- 1 illuminated switch to signal arrest of the heater, to connect to poles 5, 6 & 7 of the terminal board
(see electrical assembly diagram on page 23)
NOTE
NOTE
NOTE

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Figure 5 – CLEARANCES
Figure 6 – EXAMPLES OF INSTALLATION
minimum 400 mm
350 mm
minimum:
E32 – E42: 1.8 m
E43 – E52 – E72: 2.5 m
maximum: 3.5 m
min
200 A A

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3.3.3 SIZING AND INSTALLATION OF COMBUSTION AIR AND EXHAUST GAS PIPES
The Evoluzione series of warm air heaters may be installed in one of the following ways:
- type
B23 installation: in this type, combustion air intake occurs inside the room, while exhaust gas outlet
takes place outside, via a special pipe, that may be either horizontal or vertical. In this type of installation,
the appliance is not sealed off from the room (see Figure 7 and Figure 8)
- type
C13 and C
33 installation: the outlet of exhaust gases and intake of combustion air occur outside,
through coaxial or separate pipes, on a wall (for C13 see Figure 9 or Figure 10) or on the roof (for C33 see
Figure 11). In this way the appliance is sealed from the room in which it is installed.
- type C53 installation: the outlet of combustion products and combustion air intake occur through separate
pipes that exit on the outside of the building, on different walls. This type allows wall-based air intake and
exhaust gas outlet far from the appliance, or via the roof (see Figure 12).
- type C63 installation: with this type, exhaust outlet/air intake systems can be created using commercially
available tubes, bends and terminals, on condition that they are approved for this type of appliance. In
addition, pipes with a diameter of more than 80 mm can be used: for example when it is necessary to
create air/exhaust systems of considerable length. With this type, for the calculation of the air/exhaust
system, reference should be made to the data supplied by the pipe manufacturer, as well as to the
composition, flow rate and temperature of the exhaust gases (see Table 2).
In any case, use approved pipes according to the type of installation that is to be carried out. ROBUR S.p.A.
can supply to order rigid pipes, coaxial pipes and approved terminals.
In order to size the pipe system, it is necessary to calculate the total pressure drop generated by the system
itself.
The maximum and minimum admissible total pressure drop depend on the model of appliance (see Table 2).
Table 3 gives the pressure drops, for Ø 80 and Ø 100, for the air pipes and coaxial pipes supplied by ROBUR.
The pressure drops of the external terminals, being extremely small, can be disregarded.
In the design stage, it is necessary to verify that the sum of the pressure drops of the pipe system is higher
than the minimum admissible pressure drop and that it is lower that the maximum admissible pressure drop of
the appliance (see Table 2). The following pages give an example of how to calculate pressure drops.
The maximum lengths of the air pipe and the exhaust gas pipe, in relation to the type of installation carried out,
are given in Table 4. The lengths should be taken as APPROXIMATE, and in the case of standard installations
in which the air pipe and the exhaust gas pipe are routed in a linear fashion as shown in Figure 7, Figure 8,
Figure 9, Figure 10, Figure 11 and Figure 12.
It is ALWAYS necessary to install a condensate separator (see detail D in Figure 8), available as an
accessory (Code O-SCN000).
In the case of installations with horizontal pipes of more than 1 metre in length, in order to prevent drops of
condensate reaching the appliance, it is necessary to install the exhaust gas pipe with a counterslope of 1 or
2 cm for each metre of length.
In addition, for the correct installation of external terminals for outlet of combustion products and intake of
combustion air, follow the indications given in Figure 13.
If the integrated upper mounting bracket is not used, to make connection of the heater and the air/exhaust
gas pipes easier, ROBUR supplies as an accessory an “air/exhaust gas pipe connector kit” (Code O-
SCR010) that includes 2 adaptors Ø 80 with element for drawing exhaust gases/air (see detail C of Figure 8)
and gasket.
NOTE
NOTE
NOTE

Installation, Operation and Maintenance Manual– Ed.07/2005 15
EVOLUZIONE series natural
g
as/LPG heaters
Figure 7 – TYPE B23 INSTALLATION WITH WALL-BASED EXHAUST
OUTLET Figure 8 - TYPE B23 INSTALLATION WITH ROOF-BASED EXHAUST OUTLET
DATA FOR CALCULATION OF AIR/EXHAUST GAS SYSTEM WITH COMMERCIALLY AVAILABLE PIPES
CO2CONTENT IN EXHAUST GASES % ADMISSIBLE PRESSURE
DROP
MOD. TEMPERATURE
EXHAUST GASES
°C
FLOW RATE OF
EXHAUST GASES
IN MASS
kg/h NATURAL GAS LPG MIN (Pa) MAX (Pa)
E 32 150 43.3 5 30
E 42 170 57.5 7 40
E 43 170 62.5 8 40
E 52 170 79.1 10 50
E 72 175 116.2
9.0 9.5
10 80
Table 2
DATA FOR CALCULATION OF AIR/EXHAUST GAS SYSTEM WITH PIPES Ø 80 OR Ø 100 SUPPLIED BY ROBUR ON REQUEST
PRESSURE DROP FOR COMPONENTS Ø 80 PRESSURE DROP FOR COMPONENTS Ø 100
PIPE
(Pa/m) 90°BEND (Pa) COAXIAL (Pa) PIPE
(Pa/m) 90°BEND
(Pa)
MOD.
EXH. AIR EXH. AIR WALL ROOF EXH. AIR EXH. AIR
COAXIAL
ROOF (Pa)
E 32 0.70 0.36 1.05 0.54 2.5 4.4 0.26 0.10 0.39 0.15 3.1
E 42 1.20 0.60 1.80 0.90 4.2 12.3 0.40 0.20 0.60 0.30 7.9
E 43 1.39 0.74 2.08 1.11 4.9 14.6 0.45 0.27 0.67 0.40 10.1
E 52 2.26 1.16 3.39 1.74 9.7 25.6 0.76 0.40 1.14 0.60 16.9
E 72 4.95 2.54 7.42 3.81 13.5 48.7 1.66 0.86 2.50 1.30 31.9
Table 3
A Adaptor Ø 80
B Condensate separator
C 90° bend Ø 80
D Pipe Ø 80
E Lower mounting bracket
A
B
B
D
C
E
A Roof exhaust terminal
B Pipe Ø 80
C Adaptor Ø 80
D Condensate separator
E Upper mounting bracket
E
A B
C D

16 Installation, Operation and Maintenance Manual - Ed.07/2005
EVOLUZIONE series natural
g
as/LPG heaters
For each “T”-shaped element, consider an increase in length of 2 metres.
For each 45° bend, calculate an increase in length of 0.75 metres.
APPROXIMATE MAXIMUM LENGTHS ALLOWED FOR EACH TYPE OF INSTALLATION
TYPE OF INSTALLATION
B 23 C 13 C 33 C 53
COAXIAL ROOF
PIPE Ø 80 COAXIAL
WALL
Ø 80 Ø 80 Ø 100
HORIZONTAL VERTICAL
SEPARATE
PIPES
Ø 80 PIPES Ø 80 PIPES Ø 80 PIPES Ø 80 PIPES Ø 100
SEPARATE
PIPES
Ø 80
MOD.
EXHAUST GAS EXHAUST GAS AIR/EXH. AIR/EXH. AIR/EXH. AIR/EXH. AIR/EXH. AIR/EXH.
E 32 20 20 16+16 14+14 13+13 15+15 20+20 1+15
E 42 20 20 14+14 13+13 12+12 14+14 20+20 1+15
E 43 20 20 13+13 12+12 10+10 12+12 20+20 1+15
E 52 20 20 10+10 8+8 7+7 9+9 15+15 1+15
E 72 15 15 7+7 7+7 4+4 6+6 15+15 1+10
Table 4
If your installation does not correspond with the figures given in Table 4 above (e.g. type C13 installation of
an E 52 with air pipe diameter Ø 80 length 10 m and exhaust gas pipe diameter Ø 80 length 16 m), it is
necessary to calculate the pressure drop of the pipe system and verify that the sum is not greater than the
admissible pressure drop, or alternatively to contact ROBUR’s Pre-sales service on 035/888111.
CALCULATION – AN EXAMPLE
Let us hypothesise that we are installing an E 43 heater. The air/exhaust gas system will be created from
separate pipes, Ø 80, in the following way:
- 20 metres of exhaust gas pipe Ø 80
- Four 90° bends, Ø 80, on the exhaust gas pipe
- 8 metres of air pipes, Ø 80
It is now possible to proceed with a test calculation, remembering that the minimum admissible pressure drop
is 8 Pa while the maximum admissible pressure drop is 40 Pa (see Table 2).
Quantity Pressure drop
Exhaust gas pipe Ø 80 20 m x 1.39 Pa = 27.8 Pa +
90°bends on exhaust gas pipe 4 x 2.08 Pa = 8.32 Pa +
Air pipe Ø 80 8 m x 0.74 Pa = 5.92 Pa =
Total pressure drop 42.04 Pa
The total pressure drop of the pipe system is higher than the maximum admissible pressure drop
(42.04 Pa, HIGHER than 40 Pa). Therefore, the installation IS NOT PERMITTED.
Installation will be possible if one of the following measures is adopted:
- reducing the length of the air/exhaust gas pipes;
- reducing the number of bends in the exhaust gas pipe;
- increasing the diameter of the pipes to 100mm
NOTE
NOTE

Installation, Operation and Maintenance Manual– Ed.07/2005 17
EVOLUZIONE series natural
g
as/LPG heaters
Figure 9 – TYPE C13 INSTALLATION WITH SEPARATE WALL-
MOUNTED PIPES Figure 10 – TYPE C13 INSTALLATION WITH WALL-MOUNTED COAXIAL PIPES
Figure 11 – TYPE C53 INSTALLATION WITH ROOF-MOUNTED
COAXIAL PIPE Figure 12 –TYPE C53 INSTALLATION WITH ROOF-MOUNTED EXHAUST GAS OUTLET AND WALL-MOUNTED AIR INTAKE
A
B
A Wall-based terminal
B Integrated upper mounting
bracket with separate wall-
mounted air intake and
exhaust
g
as outlet
A Wall-mounted
coaxial pipe
Ø 150
B 90° bend Ø 80
C Adaptor Ø 80
D Lower mounting
bracket
E Condensate
separator
A Roof-mounted coaxial
exhaust gas outlet
B Pipe Ø 80
C Adaptor Ø 80
D Lower mounting bracket
A Roof-mounted
terminal
B Pipe Ø 80
C 90° bend Ø 80
D Adaptor Ø 80
E Upper mounting
bracket
F Wall-mounted
terminal
G Condensate
separator
A
B
C
D
E
G F
B
D
C E
B A
A
B
E
C
D

18 Installation, Operation and Maintenance Manual - Ed.07/2005
EVOLUZIONE series natural
g
as/LPG heaters
Figure 13 – POSITIONS OF WALL-MOUNTED TERMINAL
3.3.4 WALL INSTALLATION
For the installation of its Evoluzione heaters, ROBUR S.p.A. supplies various types of mounting brackets (as
optional extras) from which to choose according to the type of exhaust outlet to be created. In particular:
- upper mounting bracket. This supports the heater from above, and is supplied complete with condensate
drain and air/exhaust gas pipe connection kit with elements for drawing air/exhaust gas (see Figure 31).
- upper mounting bracket with integrated wall-mounted outlets (see Figure 32). This bracket performs two
functions: supporting the heater from above, and intake and outlet of combustion products. It is supplied
complete with an external dual wind-protected terminal.
- Adjustable lower mounting bracket. This supports the heater from below and allows it to adjusted by ±30°
in relation to the wall used for installation; it is supplied complete with condensate drain and air/exhaust gas
pipe connection kit with elements for drawing air/exhaust gas (see Figure 33).
- tubular support bracket. This supports the heater from below, and is supplied complete condensate drain
and air/exhaust gas pipe connection kit with elements for drawing air/exhaust gas (see Figure 34).
If it is not intended to use these accessories, refer to the diagram below. As regards fixing the appliance to the
support shelf, fix the latter with 4 M10 bolts.
Figure 14
1 = EXHAUST GAS OUTLET
2 = COMBUSTION AIR INTAKE
290
FRONT VIEW
POSITION
RECOMMENDED
2 1
POSITION
ALLOWED
2
1
POSITION NOT
ALLOWED
2
1
25
790
400