Strebel SP 150 User manual

210-0388 - Oc tober 2012
0694
SP 150
SP 170
SP 220
SP 300
SP 400
SP 600
SP 800
Gas fired storage water heaters
with sealed comb stion chamber (C type)
and forced fl e draft
MANUAL OF INSTALLATION
GENERAL INFORMATION AND CHARACTERISTICS
INSTRUCTIONS TO THE INSTALLER
INSTRUCTIONS TO THE USER

210-0388 - Edition October 2012
WARNING
•
••
• The following instruction book is an integral and essential part of the
appliance and it has to be kept with care near the appliance, for any
further consultation.
•
••
• The appliance has been concei ed for hot water production: any
other use of it has to be considered dangerous and not suitable.
•
••
• The appliance is not to be installed in damp rooms and it has to be
protected from water splashes and other liquids, to avoid anomalies to
electrical and thermal devices.
•
••
• The installation has to be made by professional qualified people, who
are responsible for the respect of all safety regulations in force. An
incorrect installation, caused by a non-observance of manufacturer’s
instructions, can cause damages to people, animals or things for which
the manufacturer cannot be considered responsible.
•
••
• The appliance, as switched on, has to be tested by an Authorised after-
sale service.
•
••
• Packaging parts plastic bags, polystyrene, wood, clips, nails,..) can be
harmful to children and should be carefully disposed of
immediately.
•
••
• Read carefully the instructions and the advice concerning safety,
installation, use and maintenance contained in this booklet.
•
••
• If the appliance is sold or transferred to a new owner, make sure that
this booklet stays with the appliance, so that the new owner or the
installer can consult it.
•
••
• Do not place anything upon the appliance.
•
••
• To avoid damages caused by low temperatures, if the appliance has to
be left unused for a long period in a non-heated room, it is
recommended to empty the unit completely. The manufacturer is not
responsible for faults, break downs or for water leakage from the plant
caused by low temperatures.
•
••
• To comply with the warranty terms, we advise you to adhere to the
following instructions and to use only original spare parts and kits,
supplied by the manufacturer.

210-0388 - Edition October 2012
INDEX ........................................................................page
1.1 TECHNICAL DATA 3
1.2 APPLIANCE CLASSIFICATION 3
1.3 PACKAGING CONTENT 4
1.4 OPERATIONAL AND FUNCTIONAL DESCRIPTION 4
1.5 CONTROL AND SAFETY DEVICES 5
1.6 DIMENSIONS AND CONNECTIONS 7
2.1 REFERENCE REGULATIONS 9
2.2 RECOMANDATIONS FOR THE INSTALLATION 9
2.3 FLUE HOOD INSTALLATION 9
2.4 WATER CONNECTIONS 10
2.5 GAS CONNECTIONS 11
2.6 GAS SUPPLY SETTING 11
2.7 GAS SUPPLY CONVERSION 11
2.8 WIRING 12
2.9 CONNECTION OF SEVERAL APPLIANCES 12
2.10 FLUE SYSTEMS 13
2.11 WIRING 15
2.12 STARTING THE APPLIANCE 16
2.13 FAULT FINDING 16
3.1 RECOMMENDATIONS FOR THE USER 17
3.2 STARTING THE APPLIANCE 17
3.3 TURNING OFF THE APPLIANCE 17
3.4 MAINTENANCE 17
3.5 WARRANTY 17
3.6 FREQUENTLY ASKED QUESTIONS 18

1 – GENERAL INFORMATION AND CHARACTERISTICS
-
3
-
210-0388 - Edition October2012
1.1 TECHNICAL DATA
mod.
150
170
220
300
400
600
800
Nominal storage capacity litres 145 160 220 300 395 585 740
Nominal input kW 18.0 19.0 25.0 29.0 29.0 31.0 31.0
Nominal output kW 16.9 17.9 23.5 27.3 27.3 29.1 29.1
Combustion efficiency - 94% 94% 94% 94% 94% 94% 94%
Flue mass g/s 9,0 9,5 12,5 14,0 14,8 16,0 16,4
Flue temperature °C 109 95 109 115 97 104 103
Recovery time (∆T = 25 °C) min 16 17 16 19 26 35 44
Recovery time (∆T = 45 °C) min 28 30 29 35 46 64 79
Continuous output (∆T = 25 °C) lt/hr 551 575 817 938 908 981 1013
lt/min 9,2 9,6 13,6 15,6 15,1 16,4 16,9
Continuous output (∆T = 45 °C) lt/hr 306 320 454 521 504 545 563
lt/min 5,1 5,3 7,6 8,7 8,4 9,1 9,4
Natural gas input rate (G20 - 20 mbar) m
3
/h 1,91 2,01 2,65 3,07 3,07 3,28 3,28
n° injectors - 11 11 16 16 16 16 16
injectors diameter mm 1.20 1.25 1.25 1.25 1.25 1.25 1.25
Burner pressure mbar 10.3 10.5 10.0 12.2 12.2 12,1 12,7
LPG input rate (G30/31 28-30/37 mbar) Kg/h 1,40 1,50 2,00 2,30 2,30 2,40 2,40
n° injectors - 11 11 16 16 16 16 16
injectors diameter mm 0.70 0.70 0,65 0.72 0.75 0.75 0.75
Power consumption 230 V ~ 50 Hz (IP20) W 67 67 67 67 67 67 67
Max working head Mpa 0,6 0,6 0,6 0,6 0,6 0,6 0,6
Empty weight Kg 128 141 220 265 309 278 324
Filled weight Kg 273 301 440 565 704 863 1064
Tests carried out in standard conditions (15 °C / 1013 mbar)
1.2 APPLIANCE CLASSIFICATION
DEFINITION
These appliances are classified as: "Gas fired water
heaters with sealed combustion chamber and atmospheric
burner, equipped with fan in the combustion circuit”.
TYPE
As classed by the European Regulation EN483, the type of
the appliance can be C12, C32, C42, C52, C62, C82
depending on the system used for the air supply and the
exhaust gas evacuation.
Here below a short description of the different types:
C12
The air intake and the flue outlet are
done by means of a horizontal coaxial
duct or through orifices sufficiently
close one to the other to be located in
almost identical wind conditions.
C32
The air intake and the flue outlet are done
by means of a vertical coaxial duct.
C42
The appliance is connected to a collective
duct consisting of a duct for the air supply
and a duct for the flue discharge. The
orifices of this system are concentric or
sufficiently close one to the other to be
located in almost identical wind
conditions.
C52
The air intake and the flue outlet have to
be located in different pressure
conditions.
C62
The appliance has to be connected to an
external system for the air supply and the
flue outlet. This external device has to be
approved and sold separately.
C82
The air intake is done by means of
an air terminal, whereas the flue
outlet is done through an individual
or collective chimney.

1 – GENERAL INFORMATION AND CHARACTERISTICS
-
4
-
210-0388 - Edition October2012
CATEGORY
The countries of destination and the categories are listed
in the chart here below.
Country
Category
Country
Category
AT I
2H
,I
3B/P
,II
2H3B/P
BE I
2E+
,I
3+
,II
2+3+
BG I
2H
,I
3B/P
, I
3
P
,II
2H3B/P
,II
2H3P
CH I
2H
,I
3B/P
,I
3+
,II
2H3B/P
,II
2H3+
CY I
2H
,I
3B/P
,I
3B
,I
3+
,II
2H3B/P
,II
2H3
+
CZ I
2H
,I
3B/P
,I
3+
,II
2H3B/P
,II
2H3+
DE I
2E
,I
3B/P
,II
2
E
3B/P
DK I
2H
,I
3B/P
,II
2H3B/P
EE I
2H
,I
3B/P
, I
3P
,II
2H3B/P
,II
2H3P
ES I
2H
,I
3+
,II
2H3+
FI I
2H
,I
3B/P
,II
2H3B/P
FR I
2E+
,I
3+
,II
2+3+
GB I
2H
,I
3+
,II
2H3+
GR I
2H
,I
3B/P
,I
3+
,II
2H3B/P
,II
2H3+
HU I
2H
,I
2S
,I
3B/P
,II
2HS3B/P
IE I
2H
,I
3+
,II
2H3+
IT I
2H
,I
3B/P
,I
3+
,II
2H3B/P
,II
2H3+
LT I
2H
,I
3B/P
,I
3+
,I
3P
,II
2H3B/P
,II
2H3+
,II
2H3P
LU I
2E
,I
3P
,II
2
E
3P
LV I
2H
,I
3B/P
,I
3P
,II
2H3B/P
,II
2H3P
MT I
2H
, I
3B/P
,I
3B
,II
2
H3B/P
,II
2H3B
NL I
2L
,I
3B/P
,II
2L3B/P
NO I
2H
,I
3B/P
,II
2H3B/P
PL I
2E
,I
3B/P
,I
3P
,II
2
E
3B/P
,II
2E3P
PT I
2H
,I
3B/P
,I
3+
,II
2H3B/P
,II
2H3+
RO I
2E
,I
2H
,I
3B/P
,II
2E
3
B/P
,II
2H3B/P
SE I
2H
,I
3B/P
,II
2H3B/P
SI I
2H
,I
3B/P
,I
3P
,I
3+
,II
2H3B/P
,II
2H3
P
,II
2H3
+
SK I
2H
,I
3B/P
,I
3P
,I
3+
,II
2H3B/
P
,II
2H3P
,II
2H3+
TR I
2H
,I
3B/P
,II
2H3B/P
The atmospheric burner can operate on gas:
Of the second family (group E, E+, H, L, S)
Of the third family (group B, P, B/P, 3+)
IMPORTANT
This installation, use and maintenance manual is valid
only for Italy.
1.3 PACKAGING CONTENT
The appliance is delivered packaged in a wood cage with
appropriate protection. A second cardboard box contains
the flue hood (with the inside fan), the flue outlet carrier
and the screws necessary for the flue hood installation.
An envelope, provided on the frontal casing of the
appliance, contains this manual and the warranty
certificate.
fig_1-03: packaging
Dimensions and gross weight of the heaters
mod. parcels
n° dimensions LxPxH
(cm)
weight
(kg)
150 2 58 x 58 x 175
46 x 46 x 23 119 9
170 2 58 x 58 x 195
46 x 46 x 23 132 9
220 2 78 x 78 x 141
67 x 67 x 23 211 9
300 2 78 x 78 x 176
67 x 67 x 23 256 9
400 2 78 x 78 x 211
67 x 67 x 23 300 9
600 2 98 x 98 x 180
67 x 67 x 23 289 9
800 2 98 x 98 x 210
67 x 67 x 23 335 9
1.4 OPERATIONAL AND FUNCTIONAL
DESCRIPTION
The purpose of the appliance is to allow the heat exchange
between the gas combustion products, burned inside the
combustion chamber, and the water stored in the tank.
The combustion is completely sealed inside the
combustion chamber: the air supply and exhaust gases
outlet are made outside the room where the appliance is
located. The sealed combustion chamber is placed at the
bottom of the heater, under the water tank.
A flue hood is placed on the top of the heater: a fan,
placed afterwards the combustion chamber, ensures the
flue gases evacuation and the proper air supply to the
burner. Inside the tank there are some flue tubes that carry
air to the combustion chamber and flue gases back to the
flue hood, increasing also the heat exchange.
LEGEND:
A. Flue hood
B. Flue kit
C. Instrument
control panel
D. Tank
E. Combustion
chamber
fig_1-04:
FLUE HOOD
A fan, placed inside the flue hood, ensures the air supply
and flue gases outlet. The flue hood can be orientated with
any angle. In case of bad operation of the fan or
obstruction of the flue pipes, a differential pressure switch,
which the flue hood is equipped of, turns off the gas supply
to the burner.
TANK
The tank is made of thick sheet steel highly resistant to
pressure. Each storage tank is internally lined with a
vitreous enamel coating (baked at more than 850° C). This
coating ensures a high chemical resistance (unassailable
from organic solvents and many other chemical
substances), an excellent abrasion resistance (low friction)
and a very good thermal stability (the opal glass on steel
resists up to 500°C; moreover frost and cold have no
effects). Generally speaking, the coating makes the
working life of the tank longer and water healthier.
A clean out and inspection door allows an easy inspection
and cleaning of the tank.
mod. 150 170 220 300 400 600 800
Ø Flange
(mm) 85 85 120 120 120 120 120
COMBUSTION CHAMBER
The combustion chamber is placed at the bottom of the
heater. The atmospheric burner and the flame detection
system are housed inside the combustion chamber that is
completely sealed.
INSTRUMENT CONTROL PANEL
All the devices needed to control and adjust the normal
operation of the heater are located on the instrument
control panel: control thermostat, ON / OFF switch, lock-
out lamp/reset push-button and thermometer.

1 – GENERAL INFORMATION AND CHARACTERISTICS
-
5
-
210-0388 - Edition October2012
FLUE SYSTEMS
(Installing the original kits supplied by the
manufacturer of the appliance is compulsory)
The flue system has to be chosen according to the
installation requirements. It connects the flue hood to the
outside of the building, supplying air to the burner and
discharging flue gases.
1.5 CONTROL AND SAFETY DEVICES
CONTROL BOX
fig_1-05-01:
Control box
The control box supervises the opening and closing of the
gas valve and the burner ignition. As it gets power supply
from the adjustable thermostat, first of all it checks if the
differential pressure switch is operating correctly.
If the differential pressure switch is operating badly, the
burner ignition is not allowed. Otherwise, a pre-purge
period of the combustion chamber elapses before the built-
in igniter and gas valve are energised. If the flame is not
established within the safety time, the control box LOCKS
OUT. In this case, in order to relight the heater, wait a few
seconds and then reset the control box, pressing the reset
push-button on the instrument control panel. Flame is
detected by ionisation, by means of a special detection
electrode placed on the burner.
It is EC approved (according to EN 298).
Technical features
Electrical supply 220/240 V - 50 Hz
Room temperature 0÷60 °C
Pre-purge time 26 sec
Safety time at the ignition 10 sec
Minimum flame current 0,7 µA
Response time off < 1 sec
GAS VALVE
The gas assembly is a multi-functional and multi-gas valve
with double safety silent operating solenoid valves (class B
- 2). It is equipped with an adjustable pressure regulator
and a low rate ignition device with ignition rate adjuster
(factory set). It is EC approved (according to EN 126).
fig_1-05-02
Gas valve
The valve body is made of die-casted aluminium. Gas inlet
and outlet connections are ½” RP” UNI-ISO 7 threads. The
valve is provided with pressure test points on both gas
inlet and outlet. The valve assembly is also equipped with
a gas inlet filter. The two solenoids are connected in series
to the main gas line and they are supplied by a single tri-
polar connector, which avoids false connections. Any
adjustment intervention must be carried out only by
qualified and professional technicians. In case of gas valve
replacement, care must be taken to prevent dirt and
foreign material from entering the valve. Gas must flow in
the direction of the arrow on the gas valve body.
Technical features
Max gas inlet pressure 60 mbar
Pressure outlet range 3÷50 mbar
Room temperature 0÷60 °C
Electrical supply 220/240 V - 50 Hz
Power consumption 15 W
Electrical protection degree IP 54
IMPORTANT
The only maintenance operation allowed is the
solenoid replacement, which has to be carried out by
qualified and professional technicians.
DIFFERENTIAL PRESSURE SWITCH
fig_1-05-03:
Differential pressure switch
The differential pressure switch acts as a combustion
(airflow) supervisor, turning off the burner in case of bad
operation of the draft hood. This can occur in case of fan
failure or obstruction in the combustion circuit.
The differential pressure switch is placed in the flue hood.
Two silicone tubes, resistant to the flue gases high
temperatures, connect the differential pressure switch to
two probes that are placed inside the flue hood, where flue
gas flows. In this way, it is possible to test the pressure
difference inside the flue pipe when the fan is operating.
The differential pressure switch has three terminals (with
two positions: normally open NA and normally closed NC).
It is EC approved (Directive 90/396/EEC and
73/23/EEC).
Technical features
Calibration
ON 110 ± 5 Pa
OFF
122 ± 5 Pa
PRESSURE RELIEF VALVE
This device allows the water discharged from the tank
through a suitable drain, in case of excessive pressure of
the water stored inside the tank.
It is EC approved (Directive 97/23/EEC).
Technical features
Body in brass (Ot 58 UNI5705/65)
Spring in special steel
Membrane in elastomer
Fixed setting 6,5±0,2 bar
fig_1-05-04:
Pressure relief valve
ADJUSTABLE THERMOSTAT
fig_1-05-05:
Adjustable thermostat (water
temperature)
An adjustable thermostat controls the general operation of
the appliance, switching the burner on and off according to
the desired water temperature. The thermostat is a single
pole liquid filled sensing bulb with operating switch
contacts.
It is BEAB approved (according to EN 60730)
Technical features
Contacts rating 250 V~ / 16 A
Temperature differential 8±2 °C
Max bulb temperature 130 °C
Max body temperature 85 °C
Temperature setting 41÷80 ±3 °C

1 – GENERAL INFORMATION AND CHARACTERISTICS
-
6
-
210-0388 - Edition October2012
HIGH TEMPERATURE LIMIT THERMOSTAT
This thermostat will turn the burner off in case of a too
high water temperature caused by a bad operation of the
adjustable thermostat.
It is a single pole liquid filled thermostat, temperature
limited with manual reset (once found out and solved the
cause of the limit operation, a manual reset is needed to
relight the heater) and positive cut off in case of capillary
breakage. The high temperature limit is factory set at 90°
C.
It is approved by SEMKO according to EN 60730 and
VDE according to DIN 3440.
Technical features
Contacts rating (C-1) 250 V~ / 0,5 A
Contacts rating (C-2) 250 V~ / 15(2,5) A
Max bulb temperature 120 °C
Max body temperature 80 °C
Intervention temperature 90 (+0/-6) °C
fig_1-05-06:
High temperature limit
thermostat

1 – GENERAL INFORMATION AND CHARACTERISTICS
-
7
-
210-0388 - Edition October2012
1.6 DIMENSIONS AND CONNECTIONS
MODELS 150 - 170
fig_1-06-01 (measures in mm)
mod.
150 170
A OVERALL HEIGHT mm 1.905 2.105
B
HEIGHT OF THE FLUE
SYSTEM mm 1.790 1.990
C
HOT WATER OUTLET C - 1"1/4
mm 1.625 1.825
D
RETURN CONNECTION R - 1" mm 720
720
E GAS CONNECTION G - 1/2" mm 415 415
F COLD WATER INLET F - 1"1/4 mm 395
395
G
BASEMENT WIDTH mm 520
520

1 – GENERAL INFORMATION AND CHARACTERISTICS
-
8
-
210-0388 - Edition October2012
MODELS 220-300-400-600-800
fig_1-06-02 (measures in mm)
mod.
220 300 400 600 800
A OVERALL HEIGHT
mm 1.560
1.912
2.275
1.950
2.310
B
HEIGHT OF THE
FLUE SYSTEM mm 1.445
1.795
2.145
1.830
2.195
C
HOT WATER
OUTLET C - 1"1/4
mm 1.285
1.640
1.985
1.655
2.030
D
RETURN
CONNECTION R - 1" mm 960 960 1.135
950 950
E
COLD WATER
INLET F - 1"1/4 mm 570 570 570 555 555
F GAS
CONNECTION G - 1/2" mm 475 475 475 475 475
G
DRAIN S - 1" mm 405 405 403 410 410
H
BASEMENT
WIDTH mm 720 720 720 920 920

2 – INSTRUCTIONS TO THE INSTALLER
-
9
-
210-0388 - Edition October2012
2.1 REFERENCE REGULATIONS
ACCORDING TO THE REGULATIONS
OF THE COUNTRY WHERE THE
HEATERS WILL BE INSTALLED
2.2 RECOMANDATIONS FOR THE
INSTALLATION
The installation must be performed by a qualified
installer, in accordance with the regulations in force.
The installer will ensure a correct installation of the
plant and carry out all tests before operating the
appliance.
Choose the appliance according to the need of
domestic hot water of the whole plant.
Follow strictly all relevant requirements at point 2.1
Installation and servicing must comply with the
instructions contained in this manual. Changes of any
connection or the non-observance of these instructions
will cause the warranty to be invalidated.
Before installation, servicing or repairing, always
isolate the electrical supply to the heater.
Use only the original flue systems supplied by the
manufacturer (to be purchased separately according to
the installation that has to be carried out).
Being classed as a Type C gas appliance, this heater can
be installed in any kind of room, with no restrictions on air
supply and room volume.
The flue pipe, in passing through the wall, has not to be
cemented, in order to permit subsequent maintenance on
it. To this purpose proper wall covers, supplied with the
appliance, can be used.
The appliance is for floor standing installation. Foresee a
suitable clearance between the heater and the side walls
to allow water and gas connections and any possible
servicing on the appliance.
fig_2-02-01
To prevent water for entering the flue pipe during storms,
we advise to install the air and flue pipe with a slight
gradient downwards.
IMPORTANT
A clearance of at least 3
0 cm should be accessible
above
the heater in order to allow any servicing
intervention to the flue hood.
The location of the appliance must take into consideration
the maximum flue length of the system chosen. To this
regard, respect the rules in force in the country where the
heater is installed.
2.3 FLUE HOOD INSTALLATION
The flue hood is delivered with the water heater in a separate box
that contains:
A. Flue hood casing in black painted aluminium
B. fan assembly
C. Ø 60/100 coaxial fitting with flue sampling
plastic bag with fixing screws
fig_2-03-01
Place the fan assembly on the top of the water heater, pointing the
Ø 60 flue outlet in the desired direction, and fix it with the screws
contained in the box.
fig_2-03-02 fig_2-03-03
Fix the bracket with the hole for cables vertically.
fig_2-03-04 fig_2-03-05
Connect the motor supply cable, pos. 2 and 3. Connect the
earthing cable, pos. 1
fig_2-03-06 fig_2-03-07
Connect the two tubes to the pressure points.
IMPORTANT:
pink tube pressure point 1 (the metal one)
neutral tube pressure point 2 (the plastic one)
Place the black flue hood casing on the heater, centring it by
means for the 4 spacers on the top of the heater:

2 – INSTRUCTIONS TO THE INSTALLER
-
10
-
210-0388 - Edition October2012
fig_2-03-08 fig_2-03-09
Connect the coaxial fitting.
fig_2-03-10
Fix the black flue hood casing to the heater by means of the
screws supplied in the box.
fig_2-03-11
2.4 WATER CONNECTIONS
To extend the working life of the appliance, respect the
following parameters, as foreseen by the European
Directive 98/83/CE (regarding the quality of water intended
for human use):
•overall water hardness: included between 15 and
50 °F (in particular where water has undergone a
softening or desalination treatment)
•chlorides : 25 mg/l (max value 200 mg/l)
•PH: included between 6,5 and 9,5
•conductibility: 400 µS/cm (max value 2500 µS/cm)
The magnesium anode (see par. 1.4), which protects the
tank, shall be compulsorily replaced at least once a year,
otherwise the warranty will be invalidated.
IMPORTANT
When water parameters are not within the above limits,
a special care must be taken in the periodical
maintenance of the tank:
it will be necessary to replace
the anode more than once a year.
Water connections
MODEL 150 - 170 220 – 300 –
400 – 600 -
800
COLD WATER CONNECTION 3/4” 1"1/4
RETURN 3/4” 1"
WATER DRAIN - - - 1"
HOT WATER CONNECTION 3/4” 1"1/4
SAFETY VALVE CONNECTION 3/4” 1"
SAFETY VALVE DRAIN 1/2” 1/2”
mod. 150-170
fig_2-04-01
A (cold water inlet)
Install in the following order:
1. a non-return valve (suggested)
2. a softener or a purifier, where conditions of high or
extreme water hardness exist (recommended for
values over 50°F)
3. an inline strainer to remove impurities such as:
sand, gravel, mud, and so on (optional)
4. a pressure reducing valve, if the pressure is too
high (recommended)
5. a stop cock (recommended)
6. a Tee connection
7. a drain cock
B (hot water outlet)
Connect to the hot water supply, providing a stop cock.
C (return circuit)
Install in the following order:
8. a Tee to which an expansion vessel (the capacity
of which has to be no less than 5% of the storage
capacity of the heater) has to be connected
(compulsory)
9. a non-return valve (optional)
D (safety valve connection)
Connect the drain of the safety valve to a suitable water
discharge:
10.safety valve (factory set)
11.water discharge (recommended)
mod. 220-300-400-600-800
fig_2-04-02
A (cold water inlet)
Install in the following order:
1. a non-return valve (recommended)
2. a softener or purifier, where conditions of high or
extreme water hardness exist (recommended for
values over 50°F)
3. an inline strainer to remove impurities such as
sand, gravel, mud (optional)
4. a pressure reducing valve, if the pressure is too
high (recommended)
5. a stop cock (recommended)
B (hot water outlet)
Connect to the hot water supply, providing a stop cock.
C (return circuit)
Install in the following order:
6. a Tee to which an expansion vessel (the capacity
of which has to be no less than 5% of the storage
capacity of the heater (compulsory)
7. a non-return valve (clapet) (optional)

2 – INSTRUCTIONS TO THE INSTALLER
-
11
-
210-0388 - Edition October2012
The return circuit is compulsory for mod. 300-400-600-
800.
D (drain)
Connect a drain cock.
E (pressure relief valve connection)
Connect the ½” drain of the safety valve to a suitable water
discharge:
8. safety valve (factory set)
9. water discharge (recommended)
IMPORTANT
Do not replace
the safety valve supplied with the
heater with a non-return valve (clapet).
2.5 GAS CONNECTIONS
Connect the heater to the gas supply line by means of a
rigid thread than can be dismantled.
The gas connection is 1/2”.
Provide the gas line with a manual gas isolation cock
which has to be installed near the appliance in an easily
accessible position.
Check the gas line for gas soundness and ensure that all
piping comply with current regulations in force (see
paragraph 2.1).
IMPORTANT
A “first stage” press
ure reducer must be installed near
the appliance in all plants supplied with LPG to reduce
the pressure to 1,5 bar (middle-
pressure pressure
regulator afterwards the heater).
A “second stage”
pressure reducer with adequate rate, must be installed
near the appliance to reduce the supply pressure to
30
mbar (low-
pressure pressure regulator afterwards
middle-
pressure pressure regulator) as required by
UNI-CIG 7432.
2.6 GAS SUPPLY SETTING
The heater is factory set for the gas type and pressure
printed on both the data label and packaging.
gas G20 (H gas or natural gas)
gas inlet pressure: 20 mbar
Pressure regulation: ON
mod. Burner pressure (mbar) n° and Ø injectors
150 9.1 11 x Ø 1.20
170 9.6 11 x Ø 1.25
220 8.1 16 x Ø 1.25
300 10.8 16 x Ø 1.25
400 11.2 16 x Ø 1.25
600 12.0 16 x Ø 1.25
800 12.5 16 x Ø 1.25
Couple G30/31 (LPG or butane/propane)
Gas inlet pressure: 28-30/37 mbar
Pressure regulation: OFF
mod. n° and Ø injectors
150 11 x Ø 0.70
170 11 x Ø 0.70
220 16 x Ø 0.65
300 16 x Ø 0.72
400 16 x Ø 0.72
600 16 x Ø 0.75
800 16 x Ø 0.75
2.7 GAS SUPPLY CONVERSION
To convert the gas type, use only the proper kits supplied
by the manufacturer.
Ref. Description For mod.
AKGPL15
From natural gas G20 to GPL G30/31
150
AKGPL17
From natural gas G20 to GPL G30/31
170
AKGPL2 From natural gas G20 to GPL G30/31
220
AKGPL34
From natural gas G20 to GPL G30/31
300-400
AKGPL68
From natural gas G20 to GPL G30/31
600-800
AKMET15
From LPG G30/31 to natural gas G20
150
AKMET From LPG G30/31 to natural gas G20
170-220-300-
400-600-800
The gas supply conversion must be carried out by a
qualified technician.
mod. 150-170
fig_2-07-01
mod. 220-300-400-600-800
fig_2-07-02
Conversion from natural gas to LPG
1. Check that the diameter of the injector in the kit is
the one needed for the gas supply with LPG (see
chart at paragraph. 2.6)
2. Close the gas cock and isolate the electrical supply.
3. Remove the burner by first detaching the gas pipe
and the electrode cables and then undoing the fixing
nuts Aof the burner door.
4. Unscrew the injectors Band replace them with the
ones contained in the kit. Fully tighten in order to
ensure gas soundness.
5. Only for mod. 220-300-400-600-800: fit the air
regulator Con the burner collector.
6. Exclude the pressure governor of the gas valve,
fully tightening the screw D
7. Start up the heater and check that the pressure at
the burner is about 28 mbar, (use the suitable
pressure test point on the gas valve)
8. Stick the label contained in the kit on the appliance
(over the label already on the valve) to signal that it
has been set for G30/31
9. Test the gas soundness and inspect all threaded
joints with leak detection fluid.
IMPORTANT
A “first stage” pressure reducer must be installed near
the appliance in all plants supplied with LPG to redu
ce
the pressure to 1,5 bar (middle-pressure pressure
regulator afterwards the heater). A “second stage”
pressure reducer with adequate rate, must be installed
near the appliance to reduce the supply pressure to 30
mbar (low-pressure pressure regulator afte
rwards
middle-
pressure pressure regulator) as required by
UNI-CIG 7432.
Conversion from LPG to natural gas
1. Check that the diameter of the injector in the kit is
the one needed for the gas supply with natural gas
(see chart at paragraph. 2.6)
2. Close the gas cock and isolate the electrical supply
3. Remove the burner by first detaching the gas pipe
and the electrode cables and then undoing the fixing
nuts Aof the burner door.

2 – INSTRUCTIONS TO THE INSTALLER
-
12
-
210-0388 - Edition October2012
4. Undo the nozzles Band replace them with the ones
contained in the kit. Fully tighten in order to ensure
gas soundness
5. Only for mod. 220-300-400-600-800: remove the
air regulator Cfrom the burner collector.
6. Set the pressure at the injector by adjusting the
screw Dtill the value for gas supply with natural gas
is reached (see table at point 2.6). The value of the
pressure at the injector can be tested by means of
the suitable pressure test point on the gas valve.
7. Start up the heater
8. Stick the label on the appliance (over the one
already on the gas valve) in order to signal that it
has been set for natural gas
9. Test for gas soundness and inspect all joints
with leak detection fluid
2.8 WIRING
The appliance has to be electrically connected to a 230V
single-phase supply mains with an efficient hearth. A
double pole switch should be fitted near the equipment in
case of general stopping of the appliance.
The connection of the electrical supply cable must comply
with the electrical regulations in force in the country where
the units are installed. In case of replacement of the
electric supply cable, use only a cable with the same
features (cable H05 VV-F - 3x0,75).
Electrical features
Electrical supply 230 V ~ 50 Hz
Gas valve power consumption 15 watts
Fan power consumption 45 watts
Flame detection consumption 7 watts
Total power consumption of the appliance
67 watts
IMPORTANT
THE MANUFACTURER CANNOT BE CONSIDERED
RESPONSIBLE FOR DAMAGES OR INJURIES CAUSED
BY FAILURE TO EARTH THE INSTALLATION
ACCORDING TO THE REQUIRED STANDARD.
2.9 CONNECTION OF SEVERAL
APPLIANCES
When several appliances have to be connected together, it
is important to connect them in such a way that they can
operate individually or together.
This is possible by means of gate valves, the closure and
opening of which allows an use according to needs (i.e.
high or low season, peak periods, repair of an equipment,
and so on). For example, we suggest these types of plants:
mod. 150-170
fig_2-10-01
Two appliances in parallel
mod. 220-300-400-600-800
fig_2-10-02
Two appliances in parallel
fig_2-10-03
Water heater with storage tank connected in series
IMPORTANT
The installation of two or more appliances connected
in series or in parallel, has to foresee for each
appliance its own air and flue duct.

2 – INSTRUCTIONS TO THE INSTALLER
-
13
-
210-0388 - Edition October2012
2.10 FLUE SYSTEMS
HORIZONTAL COAXIAL KIT
Ref. AKIT01 (configuration C12)
fig_2-10-01
The standard kit is 1 m long and it is composed by:
•N. 1 Ø60/100 L 1000 mm pipe complete with
flue terminal
•N. 1 Ø60/100 fitting with flue sampling
•N. 2 Ø100 wall covers in EPDM
Proper extension pipes are available to increase the
length of the kit (see below). The maximum length
is 3 m.
It is possible to add till two 90° elbows (in this case,
each elbow added makes the length of the kit 1 m
shorter).
Accessories available:
REF. DESCRIPTION
AIPC05 D. 60/100 L= 500 M/F PIPE
AIPC10 D. 60/100 L= 1000 M/F PIPE
AICC45 D. 60/100 45° COAXIAL BEND
AICC90 D. 60/100 90° COAXIAL BEND
fig_2-11-02
VERTICAL COAXIAL KIT
Ref. AKIT03 (configuration C32)
fig_2-10-03
The standard kit is 1 m long and it is
composed by:
•N. 1 Ø60/100 L 1000 mm vertical
terminal
•N. 1 Ø60/100 90° coaxial bend
•N. 1 Ø60/100 fitting with flue
sampling
Proper extension pipes are available to increase the
length. The maximum length is 2 m. Additional elbows
are not allowed.
Accessories available:
REF. DESCRIPTION
AIPC05 D. 60/100 L= 500 M/F PIPE
AIPC10 D. 60/100 L= 1000 M/F PIPE
fig_2-10-04

2 – INSTRUCTIONS TO THE INSTALLER
-
14
-
210-0388 - Edition October2012
HORIZONTAL SINGLE WALL FLUE SYSTEM
Ref. AKIT02 (configuration C12 – C52 – C82)
fig_2-10-05
The standard kit is 1 m long and it is composed
by: •N. 2 Ø80 L 1000 mm pipes
•N. 4 Ø80 wall covers
•N. 1 air terminal
•N. 1 flue terminal
•N. 1 Ø60/100 fitting with flue sampling
•N. 1 Ø100/80 adapter
Proper extension pipes are available to increase the
length of the kit (see below).
The maximum length is 6 m for both air and flue duct
(if you reduce the length of the air duct you cannot
increase the length of the flue one and vice versa).
It is possible to add till 5 90° elbows (in this case,
each elbow added makes the length 1 m shorter)
Accessories available:
REF. DESCRIPTION
A.I.PR802 Ø 80 L= 250 M/F PIPE
A.I.PR805 Ø 80 L= 500 M/F PIPE
A.I.PR80 Ø 80 L= 1000 M/F PIPE
A.I.CV804 Ø 80 - 45° M/F BEND
A.I.CV809 Ø 80 - 90° M/F BEND
dimension A
[mm]
mod. 150-170 36,5
mod. 220-300-400 45,0
mod. 600-800 45,0
fig_2-10-06
Configuration C12
AKIT02 + A.I.CV809
fig_2-10-07
Configuration C52
AKIT02
fig_2-10-08
Configuration C82
AKIT02 + A.I.CV809
fig_2-10-09
Configuration C82
AKIT02
Diaphragm installation. It is necessary to fit a diaphragm (D)on the air duct in order to grant a correct
operation of the appliance. The diaphragm, which is supplied with the flue kit, has to be placed in the air
duct. The choice of the proper diaphragm depends on the model and the length of the air and flue ducts.
fig_2-10-10
mod.
Diaphragm
150 no
170 no
220 Ø 52
300 Ø 52 (only configurations 1+1 2+2 3+3)
400 No
600 Ø 45 (only configurations 1+1 2+2 3+3)
800 Ø 47

2 – INSTRUCTIONS TO THE INSTALLER
-
15
-
210-0388 - Edition October2012
2.11 WIRING
fig. 2_11
GR
OUPS
1. flame detection
2. printed circuit
3. instrument control panel
COMPONENT
S
EA: ignition electrode
ER: flame detection electrode
F: line trap
FB: fuse for printed circuit (2A)
I: On/Off switch
P: differential pressure switch
PS: reset push-button
SB: lock-out light
SV: green burner (on) light
TR: adjustable thermostat
TS: limit thermostat
V: fan
VG: double gas electro-valve
COLOUR OF
CABLES
b: white
bl: blue
g: grey
m: brown
n: black
r: red
v: green
A remote device for the detection of the appliance can be connected to the printed circuit. Signals:
SV: It is active (phase present) when the appliance is operating (green light of the instrument control panel is on)
SB: It is active (phase present) when the appliance is in Lock-out (red light of the instrument control panel is on)
TS: It is active (phase present) when the TS safety limit thermostat (water temperature) has intervened (it is necessary to
connect the pin TS1 on the printed circuit with the free pin on the TS thermostat)
IMPORTANT
The appliance has to be electrically connected to a 220V monophasic electric current and wired to a good earthing.
The manufacturer shall not be considered responsible for any damage caused by the lack of connection of the plant to
the earthing.

2 – INSTRUCTIONS TO THE INSTALLER
-
16
-
210-0388 - Edition October2012
2.12 STARTING THE APPLIANCE
Before starting the water-heater ensure that:
The gas supplied is the one for which the appliance is
set
Current standards and provisions concerning the
installation of these appliances (particularly with regard
to correct connection of the flue system and the gas
supply line) have been observed
Earthing has been carried out in accordance with
current regulations
The gas isolating cocks (on the meter and near the
heater) are open
The water heater is full of water
2.13 FAULT FINDING
The control device locks out without ignition
the flame detection circuit is faulty and the control box
self-check prevents the continuation of the cycle
the flame detection electrode has a loose earth
connection
At the end of the pre-purge cycle the ignition electrode
does not spark and the control goes to lock-out
the ignition transformer inside the control box is faulty
the ignition electrode connection at the terminals of the
appliance is broken
At the end of the pre-purge cycle the ignition electrode
provides a spark, but the flame does not form and the
control box goes to lock-out
gas supply is off or there is air inside the line
the gas valve does not open because the solenoids are
faulty or their electrical connections are broken
At the end of the pre-purge cycle the ignition electrode
provides a spark, the flame forms but the control box
goes to lock-out
the flame is not establishing correctly owing to lack of
gas pressure
the detection electrode is not correctly positioned and
is not in contact with the flame
the electrical connection of the detection electrode is
broken
The appliance goes into lock-out during normal
functioning.
the gas supply has been interrupted, even temporarily:
the control box has not detected the presence of flame
and it has gone to lock-out
one of the cases in preceding points has occurred
during an intermittent functioning cycle
The heater functions for brief intermittent periods,
even though the thermostat is functioning correctly
and is in the heat requirement position.
the adjustable control thermostat is defective and is not
detecting the correct temperature
the pressure switch stops the burner because the flow
from the fan is not correct owing to an obstruction in
the flue system or excessive length
The control box is not in lock-out but the cycle remains
in pre-purge.
the pressure switch does not allow for continuation of
the cycle because the flue system is obstructed
the pressure switch does not allow for continuation of
the cycle because the fan is not functioning correctly or
does not exert sufficient pressure
the pressure switch does not allow functioning because
it is faulty or its electrical connections are broken
the pressure switch does not allow functioning because
the pressure line is obstructed or the silicon tube is
detached or broken
The control box is not in lock-out but the cycle doesn’t
start.
during the initial check of the control the pressure
switch contacts have been found in closed position
(because they are stuck or owing to incorrect setting of
the pressure switch) and accordingly do not enable the
continuation of the cycle
Check if the printed circuit fuse has blown up
IMPORTANT
For safety and warranty validity original components and
spare parts should be used for replacement and only an
Authorised Assistance Ce
ntre can carry out
maintenance and repairing interventions.

3 –INSTRUCTIONS TO THE USER
-
17
-
210-0388 - Edition October2012
3.1 RECOMMENDATIONS FOR THE USER
This booklet is an integral and essential part of the appliance and it
has to be kept with care near the appliance, for any further
consultation.
Both installation and servicing has to be done by
professional qualified people, who are responsible of
the respect of the safety regulations in force. An
incorrect installation, caused by not observing the
manufacturer’s instructions can cause damages to
people, animals or things for which the manufacturer
cannot be considered responsible.
The appliance has been manufactured for hot water
production: any other use of it has to be considered
dangerous and not suitable.
The appliance is not to be installed in damp rooms, it
has to be protected from water splashes and other
liquids, to avoid anomalies to electric and thermal
devices.
The installation has to be carried out by qualified and
professional technicians in the respect of safety
regulations in force.
Packaging parts (i.e. plastic bags, polystyrene, wood,
clips, nails, etc.) can be harmful to children and should
be carefully disposed of immediately.
Read carefully the instructions and the advice
contained in this booklet, concerning safety,
installation, use and maintenance.
If the appliance is sold or transferred to a new owner,
make sure that this booklet stays with the appliance, so
that the new owner and the installer can consult it.
Do not place anything upon the appliance.
For a longer working life of the appliance and for
warranty validity, we advise you to follow carefully the
instructions contained in this booklet, to have the
appliance checked by an Authorised Assistance Centre
periodically and to use only original accessories and
spare parts supplied by the producer.
It is strictly forbidden to temper any device that has
been factory set and sealed by the manufacturer.
3.2 STARTING THE APPLIANCE
EF
C
D
A
B
fig_3-02 : instrument control panel
A. ON/OFF switch
B. Adjustable thermostat
C. Safety limit thermostat (manual reset)
D. thermometer
E. green light
F. reset button
1. set the switch “A” to the On position "I"
2. set the adjustable thermostat “B” indicator to the
desired temperature
3. check that the lock-out light “F” is off. If not it means
that the control box is in a lock-out mode. In this case
re-set the control box by pushing the reset button. The
lock-out light will turn off.
4. After the burner ignition, which is signalled by the
lightening of the green light “E”, the water heating
phase starts. The burner will operate until the water
temperature set on the control thermostat is reached.
The ignition cycle starts. The pressure drop exerted by the
flue fan operation (in correct combustion circuit conditions)
closes the differential pressure switch contacts and the
control box starts the pre-purge cycle (pre-purge time: 30
sec.). At the end of the pre-purge cycle the gas valve and
the electric spark operates to ignite the burner. These are
controlled simultaneously.
When the burner ignites, the flame must be detected by its
detection electrode within the safety time (10 sec.),
otherwise the control box will go to lock-out which is
indicated by the red lock-out light.
This can occur easily in a new plant where there could be
air in the gas line. In this case wait for at least a minute,
press the reset push-button to reset the control box and a
new ignition cycle will start. Repeat the operation until the
residual air has been bled and ignition is regular.
IMPORTANT
Except for the previous case, the lighting of the red
warning ligh
t on the reset button usually signals a
failure or a faulty operation. In this case, we suggest
contacting an authorised Assistance Service.
3.3 TURNING OFF THE APPLIANCE
To switch off the water heater for a short period:
rotate the control thermostat knob to the minimum
value and press the On/Off switch to the “0” position.
To switch off the water heater for a lengthy period:
rotate the control thermostat knob to the minimum
value
press the On/Off switch to the “0” position.
switch off the electrical supply by the main isolating
switch
close the gas isolating valve
If the appliance has to be left unused for a long period
in a non-heated room, it is recommended the unit is
emptied completely
3.4 MAINTENANCE
To ensure the safety of the appliance and to extend its
working life, it is recommended to have the water heater
checked by an Authorised Assistance the Service at least
once in a year. The Assistance Service will carry out the
following interventions:
Replacement of the magnesium anode
Inspection of the internal surface of the tank, by means
of the inspection and cleaning flange, and cleaning of
possible calcium deposits
Check for gas soundness
3.5 WARRANTY
The warranty runs from the purchasing date that has to be
proved compulsory with a valid fiscal document (ticket or
final receipt).
For further details about the warranty terms, see the
warranty certificate delivered with the water heater.
The warranty certificate has to be preserved together with
the purchasing document (ticket or fiscal receipt) and has
to be shown to the Authorised Assistance Service in case
of any intervention under warranty.
The ownership of the only appliance does not entail the
right to warranty.
IMPORTANT
It is forbidden to tamper any device
that has been
factory set and sealed by the manufacturer

3 –INSTRUCTIONS TO THE USER
-
18
-
210-0388 - Edition October2012
3.6 FREQUENTLY ASKED QUESTIONS
1. Can we use a water-softener?
The use of a water-softener reduces the protective
effect of the magnesium anode and, as a
consequence, the working life of the tank. The
manufacturer suggests not softening the water to a
water hardness lower than 15 °F.
2. What is a magnesium anode? What’s its
function?
A magnesium anode protects the tank against the
corrosion due to the electric currents that are in the
water. The anode, when using up, avoids the
electric currents to attach the enamel coating that
protect the inside surface of the tank granting a
longer working life of the tank itself.
In order to extend the working life of the tank, the
magnesium anode has to be replaced once a year.
3. We can hear some bumps inside the tank: what
are they?
An excessive limestone formation inside the tank
can be the cause of some bumps that are audible
from the outside of the tank. The limestone
formation can depend on: first of all the quality of
the water supplied by the water supply system (it
may have very high values of water hardness).
Furthermore a high storage temperature of hot
water (temperature set by the manual adjustable
thermostat) can speed up the limestone formation.
Since the forming of limestone is an unavoidable
phenomenon, we suggest to carry out a suitable
servicing by checking and clearing the inside
surface of the tank though the inspection flange at
least once a year (operation to be carried out by an
authorized assistance service).
The producer is not reliable for possible
mistakes contained in this booklet. Moreover it
has the right of making changes in its products
at any time and without prior notice, in order
either to improve the quality or to satisfy its
commercial needs. Quality has always to be
pursued.

210-0388 - Oc tober 2012
Water-heater model
SP 150
SP 170
SP 220
SP 300
SP 400
SP 600
SP 800
is in conformity with the European Directive :
2009/142/CE – Gas app iances Directive
2006/95/CE – Low Vo tage Directive
2004/108/CE – E ectromagnetic Compatibi ity Directive