andrews LWHX56 Installation guide

andrews LWHX56 Installation guide
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Page 1
Installation
Guide,
Operation and
Maintenance
Manual
External
FASTTflo
CONTINUOUS FLOW WALL HUNG
BALANCED FLUE HEATERS FOR
NATURAL GAS AND LPG
WHX42
WHX56
LWHX42
LWHX56
THIS MANUAL MUST BE KEPT WITH THE APPLIANCE
November 2005
Part No. E799
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Page 2
Copyright Andrews Water Heaters 2005
Reproduction of any information in this publication by any method is not permitted
unless prior written approval has been obtained from Andrews Water Heaters.
Andrews Storage Water Heaters have been designed and manufactured to comply
with current International standards of safety. In the interests of the Health and
Safety of personnel and the continued safe, reliable operation of the equipment,
safe working practices must be emplyed at all times. The attention of U.K. users is
drawn to their responsibilities under the Health and Safety Regulations 1993.
All installation and service on the Andrews Water Heater must be carried out by
properly qualified personnel, and therefore no liability can be accepted for any
damage or malfunction caused as a result of intervention by unauthorised
personnel.
The Andrews Water Heaters policy is one of continuous product improvement, and
therefore the information in this manual, whilst completely up to date at the time of
publication, may be subject to revision without prior notice.
Further information and assistance can be obtained from:
Andrews Water Heaters
Wednesday One, Black Country New Road
Wednesbury, West Midlands WS10 7NZ
Tel: +44 (0)121 506 7400 Fax: +44 (0)121 506 7401
Email: [email protected]
Website: www.andrewswaterheaters.co.uk
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CONTENTS
PAGE
1)
Included Accessories
2
2)
Optional Accessories
2
3)
Quick Connect Multi System Installation
3
4)
Before Installation
4
5)
Choosing Installation Site
5
6)
Installation Clearances
6
7)
Installation
7
8)
Gas Piping
8
9)
Water Piping
9
10)
Electrical Wiring
10-11
11)
Commissioning
12-13
12)
Dimensions
14-15
13)
Optional Accessories Guide
16
14)
Servicing
17
15)
Disassembly of each part
17-23
16)
Servicing parts lists
23-33
Specifications
34-35
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Installation Manual
GAS WATER HEATER
WHX42, LWHX42
WHX56, LWHX56
(External)
(External)
WARNING: If the information in this manual is not followed exactly, a fire or explosion may result
causing property damage, personal injury or death.
Potential dangers from accidents during installation and use are divided into the following three
categories. Closely observe these warnings, they are critical to your safety.
Danger
Danger of serious injury or even death as well as danger of fire when the
product is misused by ignoring this symbol.
Warning
Possibility of serious injury or even death as well as possibility of fire when
the product is misused by ignoring this symbol.
Caution
Possibility of bodily injury or damage to property when the product is
misused by ignoring this symbol.
Prohibited
Disconnect
Power
Earth
Be sure to do
Requests to Installers
Caution
• In order to use the water heater safely, read this installation manual carefully,
and follow the installation instructions.
• Failures and damage caused by erroneous work or work not as instructed in this manual are not
covered by the warranty.
• Check that the installation was done properly in accordance with this Installation Manual upon
completion.
• After completion of installation, be sure to hand the Operation Manual to the customer upon filling
in all of the required items.
• The appliance must be installed in accordance with the Gas Safety (Installation and Use) Regulations
and the rules in force in the country of installation.
• The manufacturer's instructions supplied.
• The Gas Safety (Installation and Use) Regulations.
• The appropriate Buildings Regulations either The Building Regulations, The Building Regulations
(Scotland), The Building Regulations (Northern lreland).
• In IE, the installation must be carried out by a competent person and installed in accordance with the
current edition of I.S.813 "Domestic Gas Installations", the current Building Regulations and reference
should be made to the current ETCI rules for Electrical Installation.
SAR8285
1. Included Accessories
Part
Shape
Q’ty
Part
Owner's Guide
1
Installation Manual
(this document)
Tapping Screw
5
2. Optional Accessories
Part
Remote Controller
2
The following accessories are included with the unit.
Check for any missing items before starting installation.
Shape
Shape
Q’ty
1
The accessories listed below are not
included with the units, but may be necessary
for installation.
Q’ty
Part
1
Quick Connect
Cord
Shape
Q’ty
1
3. Quick Connect Multi System Installation
• The Quick Connect Multi System allows the installation of two units together utilizing only the Quick
Connect Cord.
The Quick Connect Cord is 2m. long. Install the two units 470mm-950mm apart at the center to
ensure the cord will be able to reach between the units. (See Typical Plumbing diagram).
(If the distance between the two units is too great, not only will the cord not be able to reach,
but the water temperature may also become unstable because of the difference in pipe length
between the two units.)
* When connecting 2 devices, use only a
single remote controller.
System Diagram
Quick Connect
Cord
Cord
Connector
Cord
Connector
Note: Connect the remote
controller to only one
of the devices.
Terminal Block
Remote Controller
Remote Controller Cord
Gas Supply Piping
G
Cold Water Supply
Hot Water
Typical Plumbing
Distance at center: 470 - 950mm.
Distance on sides
5 - 480mm.
Union
Union
Make this distance as short as possible.
* The hot water temperature will
become unstable as the pipe
length increases.
Quick Connect
Cord
Shutoff
Valve
Union
Gas Valve
Shutoff Valve
Shutoff
Valve
Hot Water
Cold Water
Leave enough clearance around the plumbing
to apply insulation. It will be necessary to add
bends to the piping to ensure that this
clearance is available.
Size the piping to allow for the maximum
flow rates of the units.
• Insulate the hot water piping to prevent heat loss. Insulate and apply heating materials to the cold
water supply piping to prevent heat loss and freezing of pipes when exposed to excessively cold
temperatures.
3
4. Before Installation
Caution
Check the Gas
• Check that the rating plate indicates the correct type of gas.
Check that the gas supply line is sized
for 62.3 kW for this unit.
Check the Power
• The power supply required is 230V AC,
at 50Hz. Using the incorrect voltage
may result in fire or electric shock.
Do Not Use Equipment for Purposes Other Than Those Specified
• Do not use for purposes other than increasing the temperature of the water supply,
as unexpected accidents may occur as a result.
Check Water Supply Quality
• If the water supply is hard, acidic or otherwise impure, treat the water with approved methods in
order to ensure full warranty coverage.
Use Extreme Caution if Using With A Solar Pre-Heater
• Using this unit with a solar pre-heater can lead to unpredictable output temperatures and
possibly scalding. If absolutely necessary, use mixing valves to ensure output temperatures do
not get to scalding levels. Do not use a solar pre-heater with the quick-connect multi-system.
Checkup
• Check the fixing brackets yearly for damage or wear. Replace if necessary.
4
5. Choosing Installation Site
* Locate the appliance in an area where leakage from the unit or connections will not result in damage
to the area adjacent to the appliance or to the lower floors of the structure. When such locations
cannot be avoided, it is recommended that a suitable drain pan, adequately drained, be installed
under the appliance. The pan must not restrict combustion air flow.
Caution
• The water heater is designed for external installation only. Never
install it indoors or in a bathroom.
• Consult with the customer concerning the location of installation.
• Avoid places where fires are common, such as those where
gasoline, benzene and adhesives are handled, or places in which
corrosive gases (ammonia, chlorine, sulfur, ethylene compounds,
acids) are present.
This may cause incomplete combustion or failures.
Internal
installation
• Locate the water heater so that there are no obstacles around the
termination and so that exhaust can't accumulate. Do not enclose the
termination with corrugated metal or other materials.
• Install the water heater in an area that allows for the proper clearances to combustible and noncombustible construction. Consult the
rating plate on the appliance for proper clearances.
• Do not install the water heater in a place where it may be threatened
by falling objects, such as under shelves.
• Do not install the water heater where the exhaust will blow on outer
walls or material not resistant to heat. Also consider the surrounding trees and animals.
The heat and moisture from the water heater may cause discoloration of walls and resinous materials, or corrosion of aluminum
materials.
• Avoid installation in places where dust or debris will accumulate.
Dust may block the air-supply opening, causing the performance of
the fan motor to drop and incomplete combustion to occur as a result.
• Install in a location where the exhaust gas flow will not be
affected by fans or range hoods.
• Take care that noise and exhaust gas will not affect neighbors.
• Avoid installation in places where special chemical agents
(e.g., hair spray or spray detergent) are used.
Ignition failures and malfunction may occur as a result.
5
6. Installation Clearances
Caution
Before installing, check for the following:
Install in accordance with relevant building and mechanical codes, as well as any local, state or
national regulations.
Check
Illustration
• Maintain the following clearances
from both combustible and
non-combustible materials.
Combustibles
Combustibles
600 mm
or more
10 mm
or more
Combustibles
300 mm
or more
Combustibles
Distance from combustibles
Item
150 mm
or more
Combustibles
150 mm or more
Clearances to Opening
into Any Building
• There must be a clearance of 600mm or
more in front of the exhaust terminal.
• This restriction will not be applied to an
area where an effective shield makes a
clearance of 600mm or more in front of
the exhaust outlet.
There must be no
building opening
within this area.
150 mm
or more
150 mm
or more
6
300 mm
or more
150 mm
or more
7. Installation
Securing to the wall
• The weight of the device will be applied to the wall. If the strength of the wall is not sufficient, reinforcement must be done to prevent the transfer of vibration.
• Do not drop or apply unnecessary force to the device when installing. Internal parts may
be damaged and may become highly dangerous.
• Install the unit on a vertical wall and ensure that it is level.
Item
Check
Locating Screw Holes
Caution
• When installing with bare hands,
take caution to not inflict injury.
• Be careful not to hit electrical
wiring, gas, or water piping while
drilling holes.
Mounting
Location of Screw Hole
Mounting Bracket
(upper)
1. Drill a single screw hole, making sure to hit a stud.
2. Insert and tighten the screw and hang the unit by
the upper wall mounting bracket.
3. Determine the positions for the remaining four screws
(two for the top bracket and two for the bottom), and
remove the unit.
4. Drill holes for the remaining four screws.
Structure
Illustration
Locating Screw Holes
Tapping Screw
5. Hang the unit again by the first screw, and then
insert and tighten the remaining four screws.
6. Take waterproofing measures so that water does
not enter the building from screws mounting the
device.
• Make sure the unit is installed securely so that it will
not fall or move due to vibrations or earth-quakes.
Terminal Guards
A terminal guard is required if persons could come into contact with the terminal or the terminal
could be subject to damage.
If a terminal guard is required, it must be positioned to provide minimum of 50 mm clearance from
any part of the terminal and be central over the terminal.
Part number:E528, Stainless Mesh Guard
Manufacturer Details: KDS Engineering Limited
Unit 7, Moor Street Industrial Estate
Moor Street
Brierley Hill
West Midlands
England
DY5 3ST
7
8. Gas Piping
Follow the instructions from the gas supplier.
The appliance and its individual shutoff valve must be disconnected from the gas supply piping system
during any pressure testing of that system at test pressures in excess of 35 mbar.
The Appliance must be isolated from the gas supply piping system by closing its individual manual shutoff
valve during any pressure testing of the gas supply piping system at test pressures equal to or less than
35 mbar.
The appliance and its gas connections must be leak tested before placing the appliance in operation.
The inlet gas pressure must be within the range specified. This is for the purposes of input adjustment.
Measuring Gas Pressure
In order to check the gas supply pressure to the unit, a
tap is provided on the gas inlet. Remove the hex head
philips screw from the tap, and connect a manometer
using a silicon tube.
Manifold Gas Pressure Adjustment
NOTE:
* Use the following procedure to adjust the manifold gas pressure
only if it can be done with a high flow rate through the unit.
(1) With a manometer or pressure guage connected to the manifold pressure
tap, press and hold the maximum pressure set button. Use the manifold
pressure increase and decrease buttons to adjust to the correct pressure.
(2) Press and hold the minimum pressure set button. Use the
Manifold Pressure
Increase Button
manifold pressure increase and decrease buttons to
adjust to the correct pressure.
(3) Repeat steps (1) and (2) until both are at the correct pressure.
Manifold Pressure
Decrease Button
UP
DOWN
Minimum Pressure
Set Button
Maximum Pressure
Set Button
Circuit Board
8
9. Water Piping
Ask a qualified plumber to perform the installation
of the plumbing. Observe all applicable codes.
This appliance is suitable for potable water. Do not use this appliance if any part has been underwater. Immediately
call a qualified service technician to inspect the appliance and replace any part of the control system and gas control
which has been under water.
If the water heater is installed in a closed water supply system, such as one having a backflow preventer in the cold
water supply line, means shall be provided to control thermal expansion. Contact ANDREWS WATER HEATERS
TECHNICAL DEPARTMENT FOR ADVICE.
Piping and components connected to the water heater shall be suitable for use with potable water.
Toxic chemicals, such as those used for boiler treatment, shall not be introduced into the potable water.
A water heater used to supply potable water may not be connected to any heating system or components previously
used with a nonpotable water heating appliance.
When water is required in one part of the system at a higher temperature than in the rest of the system, means such
as a mixing valve shall be installed to temper the water to reduce the scalding hazard.
• Flush water through the pipe to clean out metal powder, sand and dirt before connecting it.
• Take appropriate heat insulation measures (e.g., wrapping with heat insulation materials, using electric heaters)
according to the climate of the region to prevent the pipe from freezing.
• Use a union coupling or flexible pipe for connecting the pipes to reduce the force applied to the piping.
• Do not use piping with a diameter smaller than the coupling.
• When feed water pressure is too high, insert a depressurizing valve, or take water hammer prevention measures.
• Avoid using joints as much as possible to keep the piping simple.
• Avoid piping in which an air holdup can occur.
• Use approved piping materials.
• If installing the unit on a roof:
If the unit is installed on a roof to supply water to the levels below, make sure that the water pressure supplied to
the unit does not drop below 2000 mbar. It may be necessary to install a pump system to ensure that the water
pressure is maintained at this level.
Check the pressure before putting the unit into operation.
Failing to supply the proper pressure to the unit may result in noisy operation, shorter lifetime of the unit, and
may cause the unit to shut down frequently.
Supply water piping
• Do not use PVC piping.
• Mount a check valve and a shut off valve (near
the inlet).
• In order for the client to use the water heater
comfortably, 1000 mbar to 5000 mbar of pressure is needed from the water supply.
Be sure to check the water pressure. If the water
pressure is low, the water heater cannot perform
to its full capability, and may become a source of
trouble for the client.
Hot water piping
• Do not use lead or PVC piping.
• The longer the piping, the greater the heat loss.
Try to make the piping as short as possible.
• Use a mixing valve with a low water resistance.
Use shower heads with low pressure loss.
• If necessary, use a pump or other means to ensure that the supply water pressure to the inlet
of the heater does not fall below 2000 mbar when
the maximum amount of water is being demanded. Also install a pressure meter on the inlet. If this is not done, local boiling will occur inDrain piping
side the water heater causing abnormal sounds
• Expansion water may drop from the pressure
and decreasing the durability of the heat exprevention device and wet the floor. If neceschanger.
sary, provide drain piping or use a drain hose to
remove the water.
9
10. Electrical Wiring
Consult a qualified electrician
for the electrical work.
Do not connect electrical power to the unit until all electrical wiring has been completed.
i) "A means of disconnection from the supply mains having a contact separation in all poles must be provided to allow for full disconnection".
ii) Under voltage Cat III conditions should be incorporated in the fixed wiring in accordance with the wiring
regulations.
iii) "If the supply cord is damaged, it must be replaced by the manufacturer or its service agent".
This appliance must be electrically grounded in accordance with Electrical Authority Regulations.
External wiring must be correctly earthed, polarised and in accordance with the relevant standards.
In GB this is BS 6891.
In IE this is the current edition of I.S.813 "Domestic Gas Installations".
The boiler must be connected to a permanent 230 V ac, 50Hz supply.
Connection of the whole electrical system of the boiler, including any heating controls, to the electrical supply
must be through one common isolator and must be fused 10 Amp maximum.
Isolation should be by a double pole switched fused spur box, with a minimum gap of 3 mm for both poles.
The fused spur box should be readily accessible and preferably adjacent to the appliance. It should be
identified as to its use.
Caution: Label all wires prior to disconnection when servicing controls. Wiring errors can cause improper
and dangerous operation.
Verify proper operation after servicing.
Field wiring to be performed at time of appliance installation.
Caution
Do not turn on the power until the electrical wiring is finished.
This may cause electrical shock or damage to the equipment to occur.
• The electrical supply required by the water
heater is 230V AC at 50 Hz.
The power consumption may be up to 135W.
Use an appropriate circuit.
• Do not disconnect the power supply when not
in use. When the power is off, the freeze
prevention in the water heater will not activate, resulting in possible freezing damage.
Ground
• To prevent an electric shock, always plug power
lead into an earth powerpoint.
10
• Do not let the power cord contact the gas piping.
Tie the redundant power cord outside the
water heater. Putting the redundant length of
cord inside the water heater may cause electrical interference and faulty operation.
THE APPLIANCE MUST BE EARTHED
Remote Controller
• Applicable Model
WHX42, WHX56, LWHX42, LWHX56
Remote controller
Main
RC-7508M
* Up to three remote controllers can be connected. Additional remote controllers cannot be connected by themselves.
• The remote controller must be installed in accordance with the installation manual enclosed in the
package.
• Cannot be used without a remote controller.
Connecting Remote Controller Cord to Unit
•
•
•
•
Keep the remote controller cord away from the freeze prevention heaters in the unit.
Tie the redundant cord outside the water heater. Do not put the extra length inside the equipment.
The remote controller cord can be extended up to 100m with Remote controller cord.
Use a Y type terminal with a resin sleeve. (Without the sleeve, the copper wire may corrode and
cause problems).
• Be sure to hand tighten when screwing to the terminal block. Power tools may cause damage to the
terminal block.
Remote controller cord
• Use Remote controller cord for any extensions.
• Install according to the National Electrical Code and all applicable local codes.
1. Remove the front cover of the heater (4 screws).
2. Pass the remote controller cord through the wiring
throughway and into the unit.
3. Connect the Y terminals at the end of the remote
controller cord to the terminal block.
4. Secure the remote controller cord with a clamp.
5. Replace the front cover.
Clamp
Wiring
Throughway
Terminal Block
Remote controller cord
11
11. Commissioning
The installer should test operate the unit, explain to
the customer how to use the unit, and give the owner
this manual before leaving the installation
NOTE: The appliance has been factory set and no adjustment is necessary.
• Preparation ... (1) Ensure all lines are purged / flushed of debris prior to connection to appliance.
(2) Open the shut off valve on the water supply, check that water passes through the
valve and close the valve.
(3) Open the gas supply valve, turn on the power supply, and turn on the Operation
switch on the remote controller (the Operation lamp turns on) .
(1) Open a hot water fixture and confirm that the "Burner On" lamp comes on, and that hot water is
being produced. (If necessary, repeat until the air in the gas piping is bled out).
* White smoke may be noticed from the exhaust vent during cold weather. However, this is not a
malfunction of the unit.
* If an “11” error code appears on the remote controller, turn the unit off and then back on again,
and then open a hot water fixture again.
(2) Change the temperature setting on the remote controller and check that the water temperature changes.
(3) Check the secondary gas pressure.
The regulator on products is electronically controlled and pre-set in factory.
It does not require adjustment on installation under normal condition.
Perform the following procedure only if the unit is operating incorrectly and all other possible
causes have been eliminated.
1) Turn off the gas supply.
2) Turn off power supply.
3) Remove the front panel from the appliance.
4) Attached pressure gauge to gas pressure checking point. (Fig.1)
5) Turn on the gas supply
6) Turn on power supply
7) If remote controllers are fitted, turn the unit “ON” at the kitchen
controller; open a hot water tap fully.
Caution: Do not touch hot water outlet during this procedure.
8) Set the Max. and Min. gas flow rate by following the procedure
about "Manifold Gas Pressure Adjustment" on page 8.
9) Check the gas pressure at checking point.
(Fig.1)
Refer to “Specification” on page 2.
• If the water heater does not operate normally, refer to “Troubleshooting” in the Operation Manual.
* After the trial operation, clean the filter in the cold water inlet.
<If installed with a quick connect multi-system>
• Turn the system power on with the remote controller.
• Slowly open a hot water fixture and check that the units ignite sequentially. Check to see that the
hot water temperature is the same as the temperature displayed on the remote controller. (*1)
* If inlet water temperature is high, and both units do not ignite at the same time, switch which
unit will ignite first by pressing the Max. or Min. Manifold Pressure Set Button on the circuit
board and then confirm each unit can ignite. (*2)
Press Max. or Min. Manifold
Unit A Ignites
Unit A Doesn't Ignite
Pressure Set Button on Unit B
Unit B Doesn't Ignite
Unit B Ignites
* If an 11 or F11 error code flashes on the remote controller, hit the Power Button on the remote
controller off and on 2-3 times.
* If (*1) and (*2) cannot be done, the Quick Connect Cord may not be properly connected.
Check that the cord is properly connected.
Caution
Handling after trial operation
• In Freezing areas: If the unit will not be used immediately, close off all gas and water shutoff
valves, drain all of the water out of the unit and the plumbing system to prevent the unit
and system from freezing, and bleed the gas out of the gas line.
Freezing is not covered by the warranty.
12
Lighting Instructions
This water heater does not have a pilot. It is equipped with an ignition device that automatically lights
the burner.
1. Read the safety information in the installation manual or on the front of the water heater.
2. Turn off all electrical power to the unit.
3. Do not attempt to light the burner by hand.
4. Turn the gas control manual valve (external to the unit) clockwise to the off position.
5. Wait five minutes to clear out any gas. If the smell of gas remains, stop, and follow the instructions
on page 4 of this manual.
6. Turn the gas control manual valve counterclockwise to the on position.
7. Turn on electric power to the unit.
8. The unit will now operate whenever hot water is called for. If the unit will not operate, follow the
shutdown instructions and call a service technician.
Shutdown Instructions
1. Stop any water demand.
2. Turn off electric power.
3. Turn the gas control manual valve clockwise to the off position.
Should overheating occur, or the gas supply fail to shut off, turn off the gas control manual valve to the
appliance.
13
12. Dimensions
(unit: mm)
WHX42, WHX56, LWHX42, LWHX56
(VIEW FROM TOP)
361
GAS INLET (3/4)
244
60
169
87
140
70
50
450
HOT WATER OUTLET (3/4)
COLD WATER INLET (3/4)
WIRING THROUGHWAYS
170
464
140
100
70
36
10
240
450
6
257
60
23
39.7
FLUE COLLAR
665.2
615
45
UPPER WALL MOUNT
BRACKETS
LOWER WALL MOUNT
BRACKETS
AIR INLET
BOTTOM
OF CASE
BOTTOM
OF CASE
100
140
170
10
51
55
36
70
44
入水
COLD WATER INLET
WATER DRAIN VALVE
(WATER FILTER)
COLL
GROUND
WIRING THROUGHWAYS
GAS
HOT
HOT WATER OUTLET
WATER DRAIN VALVES
WATER DRAIN VALVE
14
GAS INLET
Wiring Diagram (WHX42, WHX56, LWHX42, LWHX56)
BR
BR
W 1
2
3
(UN-USED)
AIRFLOW CHANGE
-OVER CONNECTOR
R
W
O
1
2
3
4
5
6
7
BL
<CN102>
<CN89>
3
2
1
INLET WATER
THERMISTOR
W 3 W
2
W 1 W
HEAT EXCHANGER
THERMISTOR
W
W 4 W
3
2
W 1 W
W
W 2 W
W 1 W
2
1
BK
W
MAIN WATER
FLOW CONTROL
VALVE
SM
(VCC)
LS
(VCC)
(Fully open)
(GND)
1 2 3 4 5 6
BL
BL
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
<CN63>
1 2 3 4 5 6 7 8 9
MAIN CIRCUIT
BOARD
2 1
4 3
6 5
8 7
10 9
12 11
14 13
16 15
18 17
20 19
22 21
24 23
26 25
28 27
30 29
32 31
SM
(VCC)
LS
(VCC)
(Fully open)
(GND)
3
2
1
Y
3
2
1
R
BL
BL
BK
V
W
G
O
R
Y
BL
8
7
6
5
4
3
2
1
BK
V
W
G
O
R
Y
BL
BK
V
W
G
O
R
Y
BL
8
7
6
5
4
3
2
1
BK
V
W
G
O
R
1
BL
MAIN WATER
FLOW SENSOR
Y
R
BL
QS
BYPASS WATER FLOW
SENSOR
MAIN CIRCUIT
BOARD
BL
BL
G
W
BK
R
6
5
4
3
2
1
184
BL
BL
G
W
BK
R
6
5
4
3
2
1
<CN184>
(For Quick Connect Multi System Only)
6
5
4
3
2
1
BL
1 2 3 4
5 6 7 8
<CN78>
1 3 5
2 4 6
BL
BL
G
W
BK
R
BL
BL
G
W
BK
R
6
5
4
3
2
1
6
5
4
3
2
1
Quick Connect Cord(Optional)
BL
BL
(G)BK
(W)R
(BK)G
(R)W
BL
BL
G(BK)
W(R)
BK(G)
R(W)
6
5
4
3
2
1
BL
R
O
BL
BR
GY
W
BK
<CN10>
BL
8 BL
7 R
6 O
5 BL
4 BR
3 GY
2 W
1 BK
DU
10
W
BK
OY
3 2 1
BK R
G
GAS VALVE UNIT
R
W
SV
0
<CN1>
<CN160>
<CN102> BL R
4 3 2 1
1
QS
(Pulse)
(VCC)
(GND)
Manifold Gas Pressure
Increase Button
Manifold Gas Pressure
Decrease Button
Minimum Manifold Pressure Set Button
Maximum Manifold Pressure Set Button
R
R
R
R
BL
(Pulse)
(VCC)
(GND)
<CN184>
Y
BL
BL
BL
Y
R
BL
Other Unit in Quick Connect Multi System
BK
W
THERMAL FUSE
BURNER THERMISTOR
R
<CN75>
1
BYPASS WATER
FLOW CONTROL
VALVE
Y
R
BL
R
R
<CN38>
OPERATING LED
R
W
2 2 O
1 1 O
(VACANT CONNECTOR)
OUTLET WATER
THERMISTOR
1
2
3
R
BL
2 R
1 BL
(VACANT CONNECTOR)
5 4 3 2 1
9
<CN
89A>
11
SV
Q1
12
SV
Q2
13
SV
Q3
14
SV
Q4
BK
W
7 6 5 4 3 2 1
GAS MANIFOLD
<CN27>
7
6
5
4
3
2
1
<CN104>
G
GY
GY
O
O
BK
W
BR
2 1
BR
<CN101>
LIVE
NEUTRAL
VARISTOR
<CN92>
REMOTE CONTROLLER
CURRENT LEAKAGE SAFETY DEVICE
1
2
3
POWER CIRCUIT
BOARD
FREEZE PROTECTION
THERMOSTAT
2
1
BL
BL
SECONDARY
RELAY 9
RELAY 3
R
BK
B5 2
10A(FUSE)
AC100V
EARTH
1
SYSTEM CONTROLLER
RELAY 1
IG
SV0
SV1
IGNITER
SOLENOID VALVE 0
HIGH LIMIT
SWITCH
SOLENOID VALVE Q1
RELAY 10
(OPTIONAL)
RELAY 4
DC90V
RELAY 5
RELAY 2
DC140V
FLAME ROD
W (Vs)
W
BL(GND)
R (Vcc)
Y (FG)
O (Vsp)
BL
R
Y
O
W
6
5
4
3
2
1
W
BL
R
Y
O
BL
R
Y
O
IGNITER
IG
ELECTRODE
6
5
4
3
2
1
SV2
SV3
SV4
SOLENOID VALVE Q2
DC90V
SOLENOID VALVE Q3
SOLENOID VALVE Q4
DC140V
W
POWER
CONTROLLER
BL
R
Y
O
FAN FAN MOTOR
A
B
DC15V(2)
PRIMARY
W
BK
FAN CONTROL
OUTPUT
SECONDARY
DC15V(1)
HIGH-LIMIT SWITCH
W
W
BK
W
2
1
BR
1 1
2 2
GY
BR
MAIN WATER FLOW SENSOR
GND
BYPASS WATER FLOW SENSOR
Sub-CPU
SUB
CONTROL
UNIT
MAIN WATER FLOW CONTROL VALVE
CURRENT LEAKAGE
SAFETY DEVICE
(GFCI)
TRANSFORMER
BYPASS WATER FLOW CONTROL VALVE
CPU
(VACANT CONNECTOR)
THERMAL FUSE
CENTRAL
PROCESSING
UNIT
RELAY 1
BR
BL
BR
BL
Y/G
Y/G
Y/G
EARTH
EARTH
EARTH
1
2
W
BL
FREEZE PROTECTION
THERMOSTAT
BL
FREEZE PROTECTION
THERMOSTAT
BL
W
BR
GY
BL
BR
1
2
3
BR
GY
BL
BL
W
3
2
1
D
OUTLET WATER THERMISTOR
HEAT EXCHANGER
THERMISTOR
BL
W
RELAY 5
BL
BL/W W
C
INLET WATER THERMISTOR
RELAY 2
<AC230V>
A
B
15V POWER CIRCUIT
2 1
BR
BR
FAN
PULSE
CONTROL
CIRCUIT
FAN ROTATION
SPEED INPUT
BK BK W
1
2
(VACANT CONNECTOR)
(UN-USED)
EARTH
PRIMARY
RC TERMINAL
FAN MOTOR FM
VARISTOR ARRESTER
FREEZE PREVENTION
HEATER
AC230V
BL
BL
WW
WW
WW
WW
1 2
2 1
2 1
2 1
2 1
WW
WW
WW
WW
WW
BL
COLOR CODING
W : White
R : Red
BK : Black
V : Violet
O : Orange
BL : Blue
GY : Gray
G : Green
BR : Brown
Y : Yellow
RELAY
DRIVING
CIRCUIT
RELAY 7
FREEZE PROTECTION
THERMISTOR
BURNER THERMISTOR
RELAY 9
RELAY 10
DU
D
GAS PROPORTION VALVE
POWER CONTROL CIRCUIT
FLAME DETECTING CIRCUIT
FR FLAME ROD
EARTH
C
5V POWER CIRCUIT
GND
FREEZE PREVENTION HEATER
15
For Installers:
13. Optional Accessories Guide
Read this installation guide carefully
before carrying out installation.
Remote Controller Installation Manual
Model Number:
RC-7508M
Note
Do not connect power to the water heater before the remote controller has been properly installed.
Included Accessories
Part
Shape
Q’ty
Part
Shape
Remote Controller
1
Cross recessed
flat-head screw
2
Cross recessed flathead wood screw
2
Oar plug
2
Q’ty
Remote Controller Installation Procedure
(1) Remove the decorative cover.
(The decorative cover is attached very simply.)
Connect the Y-shaped terminal to the terminal block at the
back of the remote controller.
* In the case of exposed wiring (attachment to the wall), first
open up the cord intake on the main remote controller
body using pliers. (Take care not to damage the board in
the process.)
SE
T
ON
/O
FF
Main remote
controller body
Decorative cover
(2) Position the holes (diameter: 6 mm X depth: 25 - 30 mm) to
secure the remote controller for the kitchen, and knock in all
the rawlplugs. Next, secure it using oval-headed wood
screws.
SE
T
* The screws must be tightened manually, and the
remote controller secured properly without rattling.
Main remote controller body
Oval-headed wood screws
(3) Replace the decorative cover.
16
14. Servicing
Important Notes
To ensure the continued efficient and safe operation of the boiler it is recommended that it is checked
and serviced at regular intervals. The frequency of servicing will depend upon the particular installation
and usage, but in general once a year should be enough.
It is the Law that any servicing is carried out by a competent person.
When replacing a part on this appliance, use only spare parts that you can be assured conform to the
safety and performance specification that we require. Do not use reconditioned or copy parts that have
not been clearly authorised by NORITZ.
Before commencing with a service or replacement of parts the boiler should be isolated from the electrical
supply and water supply and the gas supply should be turned off at the gas service cock.
All routine servicing requirements can be achieved by the removal of the front panel only. Remove the
four screws on the front panel and lift off.
For access inside the appliances screwdriver can be used.
To remove chassis front.
Unless stated otherwise any part removed during servicing should be replaced in the reverse order to
removal.
Servicing should always include the removal of any debris from the condensate pipe and siphon.
After completing any servicing of gas carrying components, ALWAYS test for gas soundness and carry
out a functional test of the controls.
It is not necessary for the burner parts and heat exchanger parts to be cleaned up.
15. Disassembly of each part
1. Removing the transformer
(1) Remove the 2 quick fasteners and remove
the bypass pipe.
17
(2) Remove the 2 locking screws of the
transformer, then pull out.
2. Removing the electric board
(1) Remove the locking screws at the top
and bottom and ground screw, then pull
board out.
3. Removing the manifold
• Remove the electric board and fixing plate
of the ground-fault circuit interrupter in
advance.
(1) Remove the locking screw of the gas
electromagnetic valve and the manifold
pipe.
18
(2) Remove the fasten terminal of the gas
electromagnetic valve, then remove the
4 manifold locking screws.
(3) Pull up and remove the manifold.
4. Removing the hot-water supply fan
• Remove the electric board, manifold and
intake gas pipe in advance.
(1) Remove the 3 fan locking screws, then
pull out.
19
(2) Pull out the fan motor.
5. Removing the gas electromagnetic
valve block
• Remove the electric board and manifold
in advance.
(1) Remove the gas electromagnetic valve
locking screw.
(2) Pull up the gas electromagnetic valve
to the upper section and remove it.
20
6. Removing the mixing tube block
• Remove the electric board and connectors
in advance.
(1) Remove the locking screw of the intake
water pipe and the locking quick
fastener of water flow sensor set 3 of
the heat exchanger, then pull out the
intake water pipe.
For Quick-discharge type
Remove the intake water pipe locking
screw and 2 locking fasteners of the
non-return valve, then remove the
intake water pipe and pull out the
pump discharge pipe.
(2) Remove the quick fastener of the
water flow sensor set 1 and the
discharge hot-water pipe locking screw.
(3) R e m o v e t h e c o n n e c t i n g q u i c k
fasteners of the water flow sensor set
3 adjustment valve and the water flow
servo set 2, and the mixing body block
locking screw.
21
(4) Pull up the mixing tube block to the
upper section and remove it.
7. Removing the heat exchanger
• Remove the electric board, manifold,
mixing tube block and connectors in
advance.
(1) Remove the 3 locking screws at the
bottom of the burner case.
(2) Remove the 2 case top plate locking
screws.
22
16. Servicing parts lists
External outfitting WHX42AD,WHX56AD
010
072
070
011
008
007
009
012
025
001
073
003
070
050
071
002
023
040
039
003
027
022
070
070
005
004
021
730
23
WHX42AD,56AD印刷
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05.6.16, 7:27 PM
Adobe PageMaker 6.5J/PPC
External outfitting WHX42AD,WHX56AD
Part Nos.
Part Names
Order Nos.
Q'ty/unit
1
1
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
001
002
003
004
005
007
008
009
010
011
012
021
022
023
025
027
039
040
050
WHX56AD Front set-AS
Front packing S AAP
Front packing L AAP
Lamp seal plate DEC
Piping label
EDM
Exhaust top W
ELE
Exhaust box flange packing CRP
Front top packing Q CZR
Exhause box SET DHN
Exhaust box silencer board CRP
Exhaust joint packing DHN
Acoustic foam 1
DHN
Caution label W AD
ELE
Plug insulation sheet CRU
Case W AD
ELE
Cord bushing C1
Connection diagram label AD
ELE
Raintight seal plate BUB
Connecting cord 2
DMB
SKA7262
AAPL015
AAPL017
DECK008
EDMK004
ELEF005
CRPL007
CZRL001
DHNF001
CRPF012
DHNL003
DHNL006
ELEK062
CRUK002
ELEA006
7355009
ELEK063
BUBK004
DMBJ010
070
071
072
073
075
Cross recessed round-head collar N-tapping screw 4X8
Cross recessed truss type3 EVERTIGHT tapping screw with PW 4X12
Cross recessed round-head collar N-tapping screw 4X10
Cross recessed round-head collar N-tapping screw 4X12
Cross recessed round-head collar type3 EVERTIGHT tupping screw 4X12
SAD6181
SAB6510
SAD6182
SAD6183
SAD6453
24
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05.6.16, 7:27 PM
Adobe PageMaker 6.5J/PPC
Combustion unit and gas route WHX42AD,WHX56AD
100
109
102
101
105
110
117
103
126
116
131
070
104
072
117
070
132
070
118
129
173
128 073
171
172
170
111
112
114
119
125
115
070
070
173
175
122
175
121
121
120
123
172
171
124
127
172
075
25
WHX42AD,56AD印刷
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05.6.16, 7:27 PM
Adobe PageMaker 6.5J/PPC
Combustion unit and gas route WHX42AD,WHX56AD
Part Nos.
Order Nos.
Q'ty/unit
111
112
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
131
132
Combustion tube set EAC SET-V
Flame rod DLK SET-V
Plug packing(for N) DLK
Ignition plug Q(N)SET-V
Burner sensor DLK SET-V
Plug fixing plate(for N) DLK
Suction air joint packing DHN
Manifold set 15 DHN SET-AS
Manifold set 24 DHN SET-AS
Solenoid S16L CRU SET-AS
Solenoid S24L CRU SET-AS
O-ring S30 type 1A
O-ring S-38
Manifold seal packing top CRP
Manifold seal packing side CRP
Manifold seal packing bottom CRP
Fan moter Q
CXB
Manifold pipe
DHN
O-ring P25.5
Gas mech. S24DQ CRP SET-V
O-ring JASO 2028A
Gas fitting 20ASET
ELE
Mounting plate for burner case
DLT
Main damper 11 CRP
Conduit R10
DEK
Igniter AGV
High-voltage cord 470
Mounting plate for igniter
EAC
Mounting plate for igniter
DTJ
SBP7302
SBA7506
DLKL012
SBA7504
SBA7505
DLKC009
DHNL002
SAR7812
SAR7574
SAQ7346
SAQ7406
SAD6433
SAD6372
CRPL002
CRPL004
CRPL003
CXBF030
DHNE015
SAB1512
SAQ7708
8590109
ELEE001
DLTC001
CRPC052
DEKJ014
AGVJ007
SAC1229
EACC011
DTJA015
1
1
1
1
1
1
1
1<3P>
1<2H>
3
1
3
1
1
2
1
1
1
2
1
1
1
1
1
1
1
1
1
1
170
171
172
173
175
Cross recessed round-head type3 EVERTIGHT tapping screw 5X16
Cross recessed hexagon head machine screw
Cross recessed round-head machine screw M4X8
Cross recessed round-head N-tapping screw 4X8
Cross recessed round-head SPAKmachine screw with guide M4X12
SAB6001
SAC6082
SAD6373
6347606
SAD6466
100
101
102
103
104
105
109
110
Part Names
26
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Adobe PageMaker 6.5J/PPC
Hot-water feed route WHX42AD,WHX56AD
412
425
456
424
413
402
A
434
428
401
508
507
427
421
D
433
456
412
434
423
468
406
B
413
484
510
402
483
407
400
470
417
402
402
C 173
471
408
412
472
406
435
452
414
409
471
172
413
456
410
511
418
412
509
434
413
441
411
075
511
422
A
456
413
508
435
412
458
434
444
442
507
B
420
073
463
428
454
D
453
172
431
434
468
456
437
434
172
445
434
446
440
455
439
456
C
443
418
509
447
438
172
509
418
075
27
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Adobe PageMaker 6.5J/PPC
Hot-water feed route WHX42AD,WHX56AD
(Thermal fuse rounding procedure)
(Left side view)
(Front side view)
(Right side view)
(Rear side view)
Freeze preventive heater
1.Beginning of roll
Thermal fuse fastener
Heat exchanger SET
Thermal fuse
Thermal fuse fastener
28
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05.6.16, 7:27 PM
Adobe PageMaker 6.5J/PPC
Hot-water feed route WHX42AD,WHX56AD
Part Nos.
Part Names
Order Nos.
Q'ty/unit
400
401
Heat exchanger EJM SET-AS
Thermal fuse DHN SET-V
SKA7139
SBA7398
1
1
402
406
Thermal fuse fastener
CXD
Thermal fuse cover
DHN
CXDH003
DHNA014
5
2
407
408
Freeze preventive heater Q DJW SET-V
Heater fastener
EHK
SKA7037
EHKH001
1
1
409
410
411
Remaining flame safety device 120
Water flow servo set 2 DZT
Heat exchanger thermistor-300 BWC
DJPH002
DZTD011
BWCD098
1
1
1
412
413
O-ring P4C
Thermistor holding plate
1323709
ALSD088
5
5
414
417
418
O-ring P20C
Water flow servo set 1 DZT
Freeze preventive heater 3
3059502
DZTD010
DJWH003
1
1
3
420
O-ring P22C
7573308
1
421
422
423
Hot-water feed pipe
DHN
Bypass pipe
EAC
Hot-water thermistor-300 BWC
DHND010
EACD003
BWCD096
1
1
1
424
425
427
428
431
433
434
435
437
438
439
440
441
442
443
444
445
446
447
Water flow sensor set 3
DUV
Water inlet thermistor-300 BWC
Water outlet magnetic sensor
BWC
O-ring P12.5C
Water inlet pipe
EAC
Quick fastener 13-22
O-ring P16C
Shut-off cock
AXG
Water inlet fitting 20A set EAC
Water filter (SUS)
EGB
O-ring 16DF BRQ
Water filter cover
DTJ
Drain cock
CRU
Hot-water resistant O-ring P3
Mixing coupling
EAC
Mixing body
EAC
Mixing cylinder BWC
QMF safety valve A(S)
Hot-water resistant O-ring P9
DUVD019
BWCD097
BWCD090
3359808
EACD001
SAD6537
3223302
AXGD089
EACD006
EGBD032
BRQL008
DTJD006
CRUD003
SAD6633
EACD007
EACD013
BWCD035
SAA2811
SAD6635
1
1
1
2
1
1
7
2
1
1
1
1
1
1
1
1
1
1
1
452
453
454
455
Hot-water outlet fitting
HGH
O-ring P11C
Quick fastener 12.7
O-ring JASO 2026 type4 C
HGHD101
1326503
6340202
SAA6483
1
1
1
1
456
Quick fastener 16A
458
463
Water flow sensor set 1
Magnetic sensor BWC
468
470
471
472
483
484
507
508
509
510
511
DJP
ALS
DJW
6340300
6
DUVD017
BWCD093
1
1
Thermostat BVU
BVUH002
2
Conduit 86
DZT
Waterproof cover
CZL
Servo motor cable conduit (86) DZT
Dummy heater for 240V
DJW
Heater fastener M
AJB
Cross recessed truss P TIGHT screw 4X10
DZTJ008
CZLD041
DZTJ009
DJWH004
AJBL002
SAB6339
1
2
1
1
1
Cross recessed round-head P TIGHT screw 4X14
Cross&straight recessed round-head collar type3 S TIGHT tapping screw 4X8
Cross&straight recessed type3 S TIGHT tapping screw 4X8
Cross recessed round-head P TIGHT screw 4X14
SAA6473
SAD6455
6381600
SAC6300
DUV
29
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05.6.16, 7:27 PM
Adobe PageMaker 6.5J/PPC
Electronic control unit WHX42AD,WHX56AD
705
701
F
G
700
H
073
703
732
070
714
710
715
070
717
711
722
H
070
712
070
070
730
731
721
733
073
721
713
G
F
30
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Adobe PageMaker 6.5J/PPC
Electronic control unit WHX42AD,WHX56AD
Part Nos.
Part Names
Order Nos.
Q'ty/unit
700
701
Relay case ELE SET-AS
Harness AD
ELE
SHA7826
ELEJ031
1
1
703
705
Lamp cable conduit
Relay case cover
CRPJ014
DEKA014
1
1
710
711
Mounting plate for terminal block
DZT
Current leakage safety device 240 EJS
DZTA006
EJSJ022
1
1
712
713
714
Neutral indication label ELE
Power supply cord ELE
Nylon clamp HP-4N (NK-4N)
ELEK068
ELEJ006
7287909
1
1
1
715
717
Nylon clamp HP-6N (NK-6N)
Conduit 90-2 CCP
5164702
CCPJ028
1
1
721
722
Cross recessed bind machine screw M3.5X6
Cross recessed round-head N-tapping screw 4X12
SAC6564
6347801
730
731
732
733
Transformer
EJX
Transformer cover EJS
Connecting cord 1
DEM
Conduit R92-250 EJS
EJXJ021
EJSA021
DEMJ009
EJSJ016
CRP
DEK
1
1
1
1
31
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Adobe PageMaker 6.5J/PPC
Remote controller and Attached set WHX42AD,WHX56AD
Remote controller
kitchen remote controller
(RC-7508M)
751
787
788
786
752
Attached set
803
<Special part>
Special part
Special part no.
Owner's Guide
888
installation manual
889
32
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05.6.16, 7:27 PM
Adobe PageMaker 6.5J/PPC
Remote controller and Attached set WHX42AD,WHX56AD
Part Nos.
Part Names
Order Nos.
Q'ty/unit
QPAJ013
QPAA013
1
1
751
752
RC-7508M Body AD(SE) QPA
M Dressed frame body AD(SE)
786
787
788
Oar plug 6X25
Cross recessed flat-head screw M4X35
Cross recessed flat-head wood screw (All screw)4.1X20
6339000
SHB6879
SHC6365
800
803
888
889
GQ3211WZ-2AD packing set V
Cross recessed round-head type 1 tapping screw 5X35
Owner's Guide GQ-3211WZ-2AD
Installation Manual GQ-3211WZ-2AD
SKA7264
SAC6208
SAR8227
SAR8285
QPA
1
1
1
33
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Adobe PageMaker 6.5J/PPC
Specifications
• Specifications may be changed without prior notice.
• The capacity may differ slightly, depending on the water
pressure, water supply, piping conditions, and water temperature.
Specifications
Item
Model Name
Type
Specification
Installation
Air Supply/Exhaust
Ignition
Minimum Pressure for Maximum flow
Minimum Flow Rate
Dimensions
Weight
Water Holding Capacity
Connection Sizes
Water Inlet
Power Supply
Materials
Hot Water Outlet
Gas Inlet
Supply
Consumption
Casing
Flue Collar
Heat Exchanger
WHX42
LWHX42
External, Wall Hanging
Power Vented
Direct Ignition
2.0 bar
3.5 L/min.
61.5 cm(Height) x 46.4 cm(Width) x 24 cm(Depth)
30 kg
1.1 Litre
3/4"
3/4"
3/4"
230V AC (50Hz)
66W
67W
Freeze Prevention 115W
Zincified Steel Plate/Polyester Coating
Stainless Steel
Copper Sheeting, Copper Tubing
Safety Devices
Flame Rod, Thermal Fuse, Pressure Relief Valve,
Lightning Protection Device (ZNR),
Electric Leakage Prevention Device, Overheat
Prevention Device, Freezing Prevention Device,
Fan Rotation Detector
Accessories
Remote Controller, Anchoring Screws
Performance
Item
Gas
Consumption (NET)
Hot Water Capacity
Capacity Range
Temperature Settings
34
12L
13P
25°C Rise
58°C Rise
Maximum Performance
Minimum Performance
49.0 kW
5.0 kW
49.0 kW
5.0 kW
24 L/min.
10 L/min.
3.5 - 24 L/min.
37 - 48, 50, 55, 60, 65, 70, 75, 80°C
Specifications
Specification
Item
Model Name
Type
WHX56
Installation
Air Supply/Exhaust
Ignition
Minimum Pressure for Maximum flow
Minimum Flow Rate
Dimensions
Weight
Water Holding Capacity
Connection Sizes
Water Inlet
Power Supply
Materials
Hot Water Outlet
Gas Inlet
Supply
Consumption
Casing
Flue Collar
Heat Exchanger
LWHX56
External, Wall Hanging
Power Vented
Direct Ignition
2.0 bar
3.5 L/min.
61.5 cm(Height) x 46.4 cm(Width) x 24 cm(Depth)
30 kg
1.1 Litre
3/4"
3/4"
3/4"
230V AC (50Hz)
83W
Freeze Prevention 115W
Zincified Steel Plate/Polyester Coating
Stainless Steel
Copper Sheeting, Copper Tubing
Safety Devices
Flame Rod, Thermal Fuse, Pressure Relief Valve,
Lightning Protection Device (ZNR),
Electric Leakage Prevention Device, Overheat
Prevention Device, Freezing Prevention Device,
Fan Rotation Detector
Accessories
Remote Controller, Anchoring Screws
Performance
Item
Gas
Consumption (NET)
Hot Water Capacity
Capacity Range
Temperature Settings
12L
13P
25°C Rise
58°C Rise
Maximum Performance
Minimum Performance
62.3 kW
62.3 kW
5.0 kW
5.0 kW
32 L/min.
13 L/min.
3.5 - 32 L/min.
37 - 48, 50, 55, 60, 65, 70, 75, 80°C
35
12813 182x257 External
30/11/05
14:08
Page 5
Andrews Water Heaters
Wednesbury One
Black Country New Road
Wednesbury
West Midlands WS10 7NZ
Tel: +44 (0)121 506 7400
Fax: +44 (0)121 506 7401
Email: [email protected]
Website: www.andrewswaterheaters.co.uk
© WTC/WX/00404
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