HTW Modulante A02 series Service manual

OWNER’S AND INSTALLATION
MANUAL
GAS WATER HEATER
MODULANTE AO2
Thanks for choossing our product.
Please, read carefully this manual
before using the product
ENGLISH
HTW-CLM-11AO2GN
HTW-CLM-11AO2GLP

Content
Outline ……………………………………………………….3
2
1
2
3
4
5
6
7
8
9
User Instructions ………………………………..…….4
Usage …………………………………………………..5
Installation Instruction ………………………………...7
Connection to water, gas and pipe ………………….8
Gas Conversion Instruction …………………………10
First Use ……………………………………………...11
Maintenance ………………………………………….11
Technical Data …………………………..…..……….12
Malfunction and Remedies ...……………………….15

Outline
It is very necessary to read through all the warnings and contents in this manual
before installation.
Ɣ3OHDVHread carefully this manual before installation.
ƔThe installation, connection and first use of this gas water heater must be carried out
by technician personnel. Incorrect installation or maintenance might cause risk to
health or death.
Ɣ 3OHDVH read carefully this manual before ignition.
Ɣ7KHwater heater must be installed in a well-ventilated place outside the bathroom.
ƔIt is forbidden to interfere with sealed components.
Factory declaration˖
+7: Gas Instantaneous water heater is in conformity with the following EC directive:
- Gas Appliance Directive (2009/142/EC)
and that the following harmonised standards have been applied:
- relevant harmonised gas appliance standards
- EN 26 1997+A1:2000+A2:2004+A3:2006
Packing List
1 x gas instantaneous water heater
1 x Instruction Manual
1 x Installation bracket
2 x Screws and plastic plug
3

To users
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User Instructions
This product can only be used under the purpose described in this manual, that
is, to provide heated water for domestic use.
This product can only be used under normal operation conditions.
In case of any malfunction or failure, please contact with maintenance personnel.
Do not damage lead sealing labels or other labels.
Improper use might cause accidents.
Never cover the exhaust vent.
When in operation, the surface of water heater might reach 40 K, watch the burn!
Please keep this manual in a place near the product and within reach.
Prevention of gas accidents:
If gas leakage is found, you shall
1. Immediately shut off the gas water heater.
2. Shut off the gas switch.
3. Prohibit of open fire or any spark.
4. Open all the windows and doors.
5. To contact with the installation personnel and local gas supply company.
ƔThis product can only be used with gas type and gas pressure described in the technical
plate.
Ɣ Gas
conversion of gas water heater must be carried out by professional technician
personnel and must use companion spare parts.
ƔThe pipe connectors shall be checked with soap-suds at regular interval to see if there is
gas leakage.
ƔIf the gas connector is connected with rubber hose, please replace it once a year. And the
hose should be certified to applicable EN standards and local codes.
ƔIf the flame is abnormal when using natural gas, please contact with local gas supply
company.
Ɣcheck that the information of Technical Data concerning the state of adjustment given on the
data plate or the additional plate shall be compatible with the local supply conditions
Prevention of fire accident
4
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Never leave the house or go to bed when the water heater keeps heating water.
Never put inflammable and explosive goods near the water heater.

To users
Prevention of poisoning:
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When water heater is in use, oxygen inside the room where it is installed will be consumed,
so please keep the room well ventilated.
Please read carefully the manual and obey instructions of the installation personnel to
prevent any poisoning accident.
A ducting pipe must be installed and in a correct way, if necessary, please ask the help of
installation personnel.
For natural gas water heater, if the flame color turns from blue to yellow, it means gas
pressure is too low, please contact with installation personnel and local gas supply
company.
Maintenance
Ɣ7Rcheck and clean water heater every six months.
ƔTo observe flame regularly, if flame turns from blue to yellow and accompanied with black
smoke, then the water heater must be cleaned.
2
2.1
2.2
Usage
Ignition
The water heater will automatically ignite when the outlet water valve is opened. If there is only
noise but without flame, immediately shut off the outlet water valve and wait 10 seconds then
reignite.
Notice: if the water heater is not used for a long time, then above operations shall be carried
out for many times so to exhaust out all the air inside the pipe then the water heater can be
successful ignited.
Adjustment of Heat Output
Gas flow can be controlled by adjusting the gas knob. Push and turn the gas knob to adjust the
heat output . You can adjust the heat output by adjusting the gas knob between maximum and
minimum flame.
If the knob rotates to 6 o'clock clockwise , the gas valve will be closed, the water heater
will stop supplying hot water.
5
Maximum flame Minimum flame Stop burning

To users
2.3
Adjustment of water temperature
Water flow can be controlled by adjusting water temperature knob, and in this way outlet hot
water temperature can be changed. You can push and turn the water temperature knob clockwise to
decrease outlet hot water temperature and turn the knob anti-clockwise to increase hot water
temperature.
Low water temperature High water temperature
The check valve on cold water supply line must be totally opened, and
never control water flow by adjusting check valve.
2.4
2.5
Anti-freezing
If you plan not to use the water heater some period of time, then please use the
methods below to drain off water inside the water heater.
1. Shut off gas valve.
2. Take out batteries.
3. Shut off the check valve on cold water supply line.
4. Turn the water temperature knob to minimum temperature position.
5. Open hot water valve.
6. Open drainage valve to drain off the water inside.
7. Shut off the drainage valve.
Flame failure
If the flame suddenly stops burning when the water heater is in operation, it might because the
thermostat functions. At this time, the system will automatically cut off and stop supplying gas. Only
when the water heater cools down then you can reignite it.
1. To make sure the flue is not blocked up.
2. Wait till the water heater cools down.
3. Shut off water tap and then open it again.
If the water heater fails to operate, please refer to table of “Malfunction and Remedies”. If malfunction occurs again,
please contact with maintenance personnel.
6

To technician personnel
3
3.1
3.2
Installation Instruction
The product is assembled with a flue thermostat (combustion products discharge safety device),
if flue is blocked up, the thermostat will function, then gas valve will be shut off and the water
heater cannot be ignited before it cools down. Never put this thermostat out of operating. It will
be serious to timely interfere with the thermostat. Only +7:V original parts shall be used if you
need to replace the defective parts. Technical personnel need to block up the flue to check
whether or not the water heater can be shut off after replacement of the thermostat. If shut off, it
proves that the thermostat function is ok. It will be necessary to take appropriate action to
remedy the thermostat in the case of repeated shutdown of the water heater. The thermostat will
be reset when the temperature is lower than 50oC. The thermostat will interrupt the admission of
gas to the burner if the evacuation of the combustion products is disturbed, then close the water
valve and wait 5 min until the appliance cool down. Then operate the appliance as normal. If
there are repeated interruptions, please call a specialist
Never damage the flue gas controlling system.
The damage of the flue gas controlling system might cause harm to health or even
death.
Installation Method
ƔThe wall on which the water heater is mounted should be strong enough to withstand the
weight of the device. And the wall should not be sensitive to heat. If it is wood, some suitable
insulatation protected should be took.
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This gas water heater can only be installed in a well-ventilated place outside bathroom.
Must ensure well ventilation inside the room where gas water heater is installed.
Do not install in a room below 0ć.
Do not install in a damp room.
ƔThe room where gas water heater is
installed shall have a volume larger than
7.5 m3. The sum of the room volume and
the oxygen volume the gas water heater
will consume shall be larger than 17 m3.
ƔThe room shall be well ventilated and
shall have air inlet holes with area larger
than 0.06m2. The air inlet holes shall be
near the ground and connected with
outdoor so to ensure the air of outdoor can
goes inside the room.
ƔThere shall not be any visible wires,
electrical equipments or gas
pipeline above the gas water
heater.
ƔThere shall not be any gas oven, gas
stove or other gas appliances under
the gas water heater.
ƔFor easy maintenance and cleaning, there shall be at least gaps (a) of 100 mm at two sides
and a gap (b) of 300 mm below the water heater.
ƔThe pipe to the roof and walls around shall have a distance (d) of longer than 550 mm.
ƔNo combustible goods shall be kept within 500 mm of the water heater.
ƔThe water heater shall be hung and installed in a vertical way.
ƔThe water heater shall only be installed outside or in a room which is separated from
inhabited rooms and supplied with appropriate ventilation directly to the outside.
ƔThis appliance may only be installed in a room if the room meets the appropriate ventilation
requirements
Ɣ This appliance shall be installed in a suitably ventilated room, in accordance with the regulations
in force.
7

To technician personnel
Use methods as below to install the water heater:
1. Use installation template of the graph in “Technical Information” to decide positions of
installation holes.
2. If necessary, use installation template to pre-install connection parts of gas, flue gas
and water pipe.
3. Open the flip cover and shut off controlling knobs.
4. Unscrew the two screws on the bottom of the framework and dismantle the framework.
5. Install the water heater.
6. Take off the plastic cap from the connectors.
7. Install connectors. (Refer to the part of “Connection to Water, Gas and Pipe”)
8. Install framework and put on controlling knobs.
4
4.1
Connection to Water, Gas and Pipe
Gas water heater connections can only be carried out by professional technician
personnel.
Obey national installation rules.
Make sure that the gas and gas pressure are same as those described on the gas water
heater technical plate.
Please carefully clean dirt and installation residues before connecting gas pipe
and water pipe to the water heater.
Connection to Gas
ƔGas supply pipe shall be installed with a companion gas valve of G1/2’’ (as reference
image below).
ƔIf necessary, a pressure-relief valve must be installed on gas supply line.
4.2 Connection to water
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A check valve must be
installed on cold water supply
line (as reference image).
We suggest install a pressure-
relief valve on cold water
supply line.
Connect a check valve to cold
water pipe.
Use a corrugated hose to
connect cold water inlet and
check valve.
Use another corrugated hose to
connect hot water outlet to water
8
tap. Recommended Connection Line

To technician personnel
4.3 Connection to Flue
This product must be connected to flue or a chimney.
This product must be connected to specially designed flue before use. The flue shall
meet the specifications as below:
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Minimum vertical length: 0.5 m.
Maximum length: 3 m.
Maximum turns: 2 x 90°, one elbow pipe shall be connected with a straight pipe of 1 m.
A wind cap must be installed on the end of the pipe or the chimney.
The distance (g) between the wind cap and wall shall be at least 150mm.
The parts of pipe must be fixed firmly.
The pipe mustn’t be installed through the ceiling.
Do not install the pipe through combustible goods; for unavoidable circumstances, the
combustible goods must be wrapped by insulating materials of no less than 20 mm
thickness.
The gap of the hole between the pipe and the wall mustn’t be stuffed with cement or
similar material, so that it is convenient for maintenance.
There shall be an air inlet near the ground in the installation room.
Pipe installed through the wall Pipe installed through chimney
9

To technician personnel
5
5.1
Gas Conversion
Different gas conversion of gas water heater must be carried out by professional
technician personnel.
Any broken seals shall be re-made and/ or any adjuster shall be sealed.
A self-adhesive label which is intended to be fitted on the water heater shall be supplied
with the parts and the conversion instructions provided by+7:. The supplementary
marking indicating the appliance conversion shall be stated on the label.
Gas conversion instruction
(1): Gas manifold must be changed in order to converse to different gas type
1. Dismantle the ignition tube that connecting the ignition pin and valve assembles;
2. Dismantle the screw that connecting the manifold and valve and apart the burner from valve assembles;
3. Dismantle the manifold from the burner
4. Dismantle the valve assembles from the valve holder
5. Replace the manifold; please refer to the graph “Nozzle Specification” shown in “Technical Date”, and
install the correct manifold to the according burner.
6. Replace the valve assembles; please refer to that the valve assembles specification of NG gas type is
LIV-111N-20 and that for LPG gas type is LIV-111L-29, and install the according valve assembles to
the valve holder
7. Install the screw of manifold to the valve assembles and use the O shape rubber seals into the connection˗
8. Fix the ignition tube to the ignition pin and valve and use the O shape rubber seals into the connection˗
9.Check if the connecting parts between burner and valve are fixed firmly˗
10. After conversion and before the first use, please refer to “Nozzle Specification” shown in “Technical Date”
for rated pressure and perform the leakage testing
10

To technician personnel
6 First Use
The first-time use of water heater shall be carried out by professional technician
personnel.
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Open battery box and put two batteries (model. LR20, 1.5V) inside.
Open hot water valve to let water run out and then shut off it.
Open gas inlet valve.
Turn the heat output knob (gas knob) to maximum position.
Open hot water outlet valve.
Observe the flame.
For first-time use, please refer to “Nozzle specification” shown in “Technical Data” for
rated pressure.
7
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7.1
Maintenance
Maintenance of gas water heater shall be carried out by professional technician
personnel.
Obey national maintenance rules.
Before carrying out maintenance, the water heater shall be cooled down.
Must use specific spare parts supplied by +7:, otherwise, we do not
accept any claims.
Connection to Gas
ƔFor LPG gas water heater: if using rubber hose to connect to gas circuit, please
replace the rubber hose every year.
ƔUse soap-suds to check gas connectors to see if there is any leakage.
7.2 Heat Exchanger
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Shut off gas inlet valve.
Dismantle the end cap of gas water heater.
Shut off water inlet valve.
Open hot water outlet valve.
Open drainage valve to release the water.
Disassemble heat exchanger from the water heater.
Use a paint brush to clean the fins of the heat exchanger.
Use water spouts to clean heavy dirt.
7.3 Burner
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Dismantle the burner off the water heater.
Use a paint brush to clean its surface and top, and blow away the dust on the burner fins.
11
7.4 Water Inlet Filter
ƔDismantle water pipe from cold water inlet of the water heater.
ƔTake off and clean the cold water inlet filter.

Model No. Unit +7:&/0$*1 +7:&/0$*/3
Pin code 0845CQ0006 0845CQ0006
Type B11BS B11BS
Heat input Qn (Hi) kW 22 22
Min. Heat input Qmin(Hi) kW 9 9
Nominal useful output Pn (Hi) kW 19 19
Min useful output Pmin kW 7.5 7.5
Heat efficiency
Nominal heat efficiency % >84 >84
Gas data
Gas consumption
NG (G20) m³/h 0.82~2.25 0.82~2.25
LPG (G30) kg/h 0.58~1.35 0.58~1.35
Flue gas data (15 °C, 1013.25 mbar, dry flue gas)
Flue gas nominal flow rate g/s 6.4 6.4
Flue gas average temperature °C 170 170
Hot water data
Nominal water flow rate l/min 11 11
Cold inlet water is 15°C, water temperature of
maximum flame can reach °C 40-85 40-85
Cold inlet water is 15°C, water temperature of
minimum flame can reach °C 22-33 22-33
Minimum water pressure Pw bar 0.5 0.5
Maximum water pressure PMW bar 10 10
Electricity data
Electricity source 2 x 1.5V, model LR20 2 x 1.5V, model LR20
Connectors’ data
Water pipe connector inch ½” ½”
Gas pipe connector inch ½” ½”
Flue diameter mm 110 110
Flue length min. / max. m 0.5-4 0.5-4
Dimension / Weight
Width x Height x Depth mm 310x 580 x 216 310x 580 x 216
Weight kg 10.5 10.5
Nozzle specification
Nozzles quantity - 12 12
Natural gas G20
Nozzle diameter mm 1.12 1.12
Nozzle rated pressure mbar 20 20
Liquefied Petroleum Gas G30/G31
Nozzle diameter mm 0.7 0.7
Nozzle rated pressure mbar 28~30/37 28~30/37
To technician personnel
7.5 Framework
Ɣ Use soft cloth with neutral detergent to clean the framework. DO NOT use chemical or
corrosive detergent to clean.
12
8 Technical Data

To technician personnel
8.1 Dimensions
Front Side Installation size
Gas water heater dimensions
+7:&/0$*1
+7:&/0$*/3
Amm 580 580
Bmm 310 310
Cmm 216 216
Connectors Sizes
Dmm 115 115
Emm 112 112
Fmm 65 65
Gmm 111.5 111.5
Hmm 68.5 68.5
Imm 34 34
Jmm 139 139
Installation size
Kmm 161 161
13

To technician personnel
8.2

+7:&/0$internal structure drawing
8.3 +7:&/0$internal structure drawing
1. Draft hood
2. 100ćthermostat
3. Heat exchanger bracket
4. 85ćthermostat
5. Heat exchanger
6. Ignition pin assembly
7. Ignition tube
8. Gas manifold assembly
9. Pulse ignition heat shield
10. Pulse ignition
11. Water valve core assembly
12. Water inlet
13. Microswitch
14. Gas inlet
15. Battery box
16. Valve bracket
17. Water outlet
18. Temperature sensor
19. Gas valve core assembly
20. Gas pressure test point
21. Differential pressure valve
22. Back panel assembly
23. Current generator
14

Malfunctions
Causes
Fire goes out during use No ignite after turning on The flame bursts Flame is yellow Abnormal flame with peculiar smell Difficult ignition Outlet water temperature is too low Outlet water temperature is too high Fire doesn’t ignite at low temp. position. Fire isn't out after water heater is off.
Remedies
Flue is blocked up. ƽCheck the flue and make sure it is not blocked up.
Gas valve is not open. ƽFully open gas valve or replace gas tank.
Gas valve is half open. ƽFully open gas valve
There is air inside gas
valve.
ƽRepeatedly turn on and off the outlet water valve until
the water heater ignites successfully.
Gas pressure is too high. ƽƽƽContact with maintenance personnel
Gas pressure is too low. ƽƽ Contact with maintenance personnel
Freezing ƽContact with maintenance personnel
Inlet water pressure is not
enough.
ƽƽ ƽƽContact with maintenance personnel
Burner is blocked. ƽƽƽ Contact with maintenance personnel
Heat exchanger is blocked. ƽƽƽ Contact with maintenance personnel
Water controlling device
defect
ƽƽ ƽƽ ƽContact with maintenance personnel
Pulse ignition defect ƽƽ Contact with maintenance personnel
Internal wires looses ƽƽ Contact with maintenance personnel
Micro-switch defect ƽContact with maintenance personnel
Batteries are put at wrong
terminals
ƽPut the batteries correctly
Electromagnetic valve
defect
ƽƽ Contact with maintenance personnel
Feedback electrode
defect
ƽContact with maintenance personnel
Discharge distance or part
is abnormal.
ƽContact with maintenance personnel
Batteries have run down. ƽƽ Replace with new batteries
Inlet water valve is not
opened.
ƽFully open inlet water valve
Fresh air is not enough. ƽƽƽ Contact with maintenance personnel
9 Malfunction and remedies
Severe harm or death might be caused if the following instructions are
not followed.
In case of malfunction, please shut off the water heater immediately and contact
with technician personnel.
MUSTN’T try to repair the water heater by yourself.
ܐ 
MUSTN’T use the water heater if it appears malfunction.
Must use specific spare parts supplied by +7:, otherwise, we do not
accept any claims.
9.1 Malfunction Sheet
To users
15

C./ Industria, 13 l Polígono Industrial El Pedregar
08160 Montmeló
Barcelona (Spain)
Phone: [phone]
Fax: [phone]
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