wh-td20e3e5 wh-td30e3e5-1 wh-td20e3e5-uk wh-td30e3e5

Order No: RAC1309001CE
WH-TD20E3E5
WH-TD30E3E5-1
WH-TD20E3E5-UK
WH-TD30E3E5-UK
WARNING
This service information is designed for experienced repair technicians only and is not designed for use by the general public.
It does not contain warnings or cautions to advise non-technical individuals of potential dangers in attempting to service a product.
Products powered by electricity should be serviced or repaired only by experienced professional technicians. Any attempt to
service or repair the products dealt with in this service information by anyone else could result in serious injury or death.
PRECAUTION OF LOW TEMPERATURE
In order to avoid frostbite, be assured of no refrigerant leakage during the installation or repairing of refrigerant circuit.
TABLE OF CONTENTS
1. Safety Precautions.............................................3
2. Specification .......................................................5
3. Features ..............................................................7
4. Tank Dimensions & Components.....................8
4.1
4.2
WH-TD20E3E5 WH-TD30E3E5-1 ..............8
WH-TD20E3E5-UK WH-TD30E3E5-UK .....9
5. Water Cycle Diagram .......................................10
6. Installation Instruction.....................................11
6.1
WH-TD20E3E5 WH-TD30E3E5-1 ............11
6.2
WH-TD20E3E5-UK WH-TD30E3E5-UK ...15
7. Operation Control.............................................20
7.1
7.2
7.3
Safety Valve ...............................................20
Thermostat .................................................20
3-Way Valve ...............................................20
8. Troubleshooting Guide....................................21
9. Disassembly Instructions................................22
9.1
9.2
9.3
Replacing the Heating Element..................22
Replacing the Thermostat ..........................22
Replacing the Sacrificial Anode .................22
© Panasonic Corporation 2013.
10. Technical Data ..................................................23
10.1
Tank Thermistor .........................................23
11. Replacement Parts List....................................24
11.1
WH-TD20E3E5 WH-TD30E3E5-1.............24
12. Replacement Parts List....................................25
12.1
WH-TD20E3E5-UK WH-TD30E3E5-UK ...25
2
1. Safety Precautions



Read the following “SAFETY PRECAUTIONS” carefully before installation of Domestic Hot Water Tank Unit
(hereafter referred to as “Tank Unit”).
Electrical works and water installation works must be done by licensed electrician and licensed water system
installer respectively. Be sure to use correct rating and main circuit for the model installed.
The caution items stated here must be followed because these important contents are related to safety. The
meaning of each indication used is as below. Incorrect installation due to ignorance or negligence of the
instructions will cause harm or damage, and the seriousness is classified by the following indications.
WARNING
This indication shows the possibility of causing death or serious injury.
CAUTION
This indication shows the possibility of causing injury or damage to properties only.
The items to be followed are classified by the symbols:
Symbol with white background denotes item that is PROHIBITED from doing.
Symbol with dark background denotes item that must be carried out.


Carry out test run to confirm that no abnormality occurs after the service installation. Then, explain to user the
operation, care and maintenance as stated in instructions. Please remind the customer to keep the operating
instructions for future reference.
If there is any doubt about the installation procedure or operation, always contact the authorized dealer for advice
and information.
WARNING
1. Do not modify the machine, part, material during repairing service.
2. If wiring unit is supplied as repairing part, do not repair or connect the wire even only partial wire break. Exchange the whole wiring unit.
3. Must engage an authorized dealer or specialist for installation and servicing. If installation or servicing is defective, it will cause water leakage,
electrical shock or fire.
4. Install according to the installation instructions strictly. If installation is defective, it will cause water leakage, electrical shock or fire.
5. Use the attached accessories parts and specified parts for installation. Otherwise, it will cause the set to fall, water leakage, fire or electrical
shock.
6. Install at a flat horizontal, strong and firm location which is able to withstand the Tank Unit’s weight. If the location is slanting. or strength is not
enough the set will fall and cause injury.
7. For electrical work, follow the local national wiring standard, regulation and the installation instruction. An independent circuit and single outlet
must be used. If electrical circuit capacity is not enough or defect found in electrical work, it will cause electrical shock or fire.
8. Only use the supplied and specified installation parts. Else, it may causes Tank Unit vibrate, water leakage, electrical shock or fire.
9. This Tank Unit can only be used in a close water system. Utilization in an open water system may lead to excessive corrosion of the water
piping, water leakage or under pressure to the Tank Unit.
10. Do not make any purchase of electrical parts locally for installation, service, maintenance, etc. This should be done by a licensed
electrician and an authorized dealer. Otherwise, it may cause electrical shock or fire.
11. Do not branch the power from terminal block to heater tap. Overloaded terminal block will cause electrical shock or fire.
12. Keep plastic bag (packaging material) away from small children, it may caused suffocation.
13. For cold water supply has a backflow regulator, check valve or water meter with check valve, provisions for thermal expansion of water in the
hot water system must be provided. Otherwise it will cause water leakage.
14. The piping installation work must be flushed before Tank Unit is connected to remove contaminants. Contaminants may damage the Tank Unit
components.
15. The installation may be subjected to building regulation approval applicable to respective country that may require to notify the local authority
before installation.
16. The Tank Unit must be shipped and stored in upright condition and dry environment. It may laid on its back when being moved into the
building.
17. Work done to the Tank Unit after remove the front plate cover that secured by screws, must be carried out under the supervision of authorized
dealer and licensed.
3
CAUTION
1. Installation work.
Three people are required to carry out the installation work. The weight of Tank Unit might cause injury if carried by one person.
2. Do not install Tank Unit at place where leakage of flammable gas may occur. In case gas leaks and accumulates at surrounding of the
Tank unit, it may cause fire.
3. Carry out drainage piping as mentioned in installation instructions. If drainage is not perfect, water leakage may happen and may cause
damage to properties of the user.
4. Select an installation location where it is accessible for maintenance.
5. Do not install this appliance in a laundry room or other high humidity location. This condition will cause rust and damage to the Tank
unit.
6. Make sure the power supply cord does not contact with hot part (i.e. water piping). High temperature may cause insulator of power
supply cord damage hence electrical shock or fire.
7. After installation or servicing, it is obliged to verify correct operation of the Tank Unit. Check the connection points for water leakage. If leakage
occurs, it will cause damage to other properties.
8. Ensure the correct polarity is maintained throughout all wiring. Otherwise, it will cause electrical shock or fire.
4
2. Specification
Model
WH-TD20E3E5
Power Supply
Connection
WH-TD30E3E5-1
Phase, Hz
Single, 50
V
230
inch
Stainless Steel 5/4 (CW602N brass quality)
Material
Electric Element
Capacity
Pressure vessel
Thermostat
Incoloy 825
kW
3
Btu/h
10243
kJ/h
10800
Material
Volume
Stainless Steel F18MT / AISI 444 / DIN 1.4521
L
198
Type
287
Thermodisc type TS2 59/66T (300136)
Temperature range
°C
60 - 90, preset at 88
Thermistor
Set Temperature
°C
40 ~ 75
Heating coil
Diameter / Thickness
Material
Surface area
Stainless Steel LDX 2101 / DIN 1.4162 (Lean Duplex)
mm
m
Ø 22 / 0.8
2
1.4
1.8
Material
Insulation
Insulation Jacket
Dimension
Weight
Connection
Design data
ECO Foam - PUR
Thickness
mm
Heat loss
kW
40
Approx. 2.1 / 24hours
Material
Approx. 2.7 / 24hours
Epoxy-coated steel - 90 gloss - white
Diameter
mm
580
580
Height
mm
1150
1600
Net
kg
49
65
Cold water inlet
inch
3/4 BSP (with inside baffle plate)
Hot water outlet
inch
3/4 BSP
Drain
inch
3/4 BSP (same connection as cold water inlet)
Flow & return
inch
2 × 3/4 BSP
Sensor pocket
inch
2 × 1/2 BSP
Anode
inch
3/4 BSP
Design pressure
bar
10
Design temperature
°C
99
5
Model
WH-TD20E3E5-UK
Power Supply
Connection
Phase, Hz
Single, 50
V
230
inch
Stainless Steel 5/4 (CW602N brass quality)
Material
Electric Element
Capacity
Pressure vessel
Thermostat
Thermistor
Temperature & Pressure
Valve
Incoloy 825
kW
3
Btu/h
10243
kJ/h
10800
Material
Volume
Stainless Steel F18MT / AISI 444 / DIN 1.4521
L
198
Type
Temperature range
°C
55 - 85, preset at 79
Set Temperature
°C
40 ~ 75
Pressure relief tolerance
%
+/-5
Temperature relief
°C
90 - 95
Discharge capacity
kW
10
Stainless Steel LDX 2101 / DIN 1.4162 (Lean Duplex)
Diameter / Thickness
mm
Surface area
m
Ø 22 / 0.8
2
1.4
1.8
Material
Insulation
Insulation Jacket
Dimension
Weight
Connection
Design data
1.
287
Thermodisc type TS2 59T/66T (300159)
Material
Heating coil
WH-TD30E3E5-UK
ECO Foam - PUR
Thickness
mm
Heat loss
kW
40
Approx. 2.1 / 24hours
Material
Approx. 2.7 / 24hours
Epoxy-coated steel - 90 gloss - white
Diameter
mm
580
580
Height
mm
1150
1600
Net
kg
49
65
Cold water inlet
inch
3/4 BSP (with inside baffle plate)
Hot water outlet
inch
3/4 BSP
Drain
inch
3/4 BSP (same connection as cold water inlet)
Flow & return
inch
2 × 3/4 BSP
Sensor pocket
inch
2 × 1/2 BSP
Anode
inch
3/4 BSP
Temperature & Pressure
valve
inch
3/4 × 1/2 BSP
Design pressure
bar
10
Design temperature
°C
99
This T&P valve (TPR15) for WH-TD20E3E5-UK and WH-TD30E3E5-UK must be used 75°C and under.
6
3. Features

A hot water storage tank with capacity of 300Litres and 200Litres

High Efficiency

High Durable
o Made of clean stainless steel, the tank is designed to provide long lasting durability and toughness and
exceptional resistance to rust.

Maximum convenience and safety
o Hot water setting temperature of tank:40°C ~ Max 75°C.
(Set by remote control of indoor unit)

Safety by 2 thermostats
o 1st stage Set 88°C (Can be cancelled by remote control)
o 2nd stage Set 95°C (Can be cancelled by thermostat reset button)

Maximum compatibility
o Built-in coil in stainless steel which is designed for circulation from solar panel, etc.

Serviceability Feature
o Easy draining of the heater with a drain valve on the pressure relief valve.
7
4. Tank Dimensions & Components
4.1
WH-TD20E3E5 WH-TD30E3E5-1
1600
65
46
148
65
46
WH-TD20E3E5
WH-TD30E3E5-1
Main Components
1. Hot water outlet – 19.05 mm (3/4"BSP)
2. Electrical box lid
3. Sensor socket – 12.70 mm (1/2"BSP)
4. Flow inlet – 19.05 mm (3/4"BSP)
5. Return outlet – 19.05 mm (3/4"BSP)
6. Cold water inlet – 19.05 mm (3/4"BSP)
7. Threaded Sensor hole for solar station connection
– 12.70 mm (1/2"BSP)
8. Anode connector – 19.05 mm (3/4"BSP)
Electrical Box Detail
1
8
2
Reset button
Safetycut-out
Remove this jumper
when connecting
the Tank Unit to a
PanasonicAir-to-Water
Heatpump Indoor Unit
(except S*H model)
7
Height
Thermostat
3
4
5
6
Electric element
5/4"BSP
Diameter
8
765
148
205
1,8m2
300
600
800
100
410
575
1150
1,4m
2
1250
100
148
148
580
Unit: mm
4.2
WH-TD20E3E5-UK WH-TD30E3E5-UK
1600
148
65
46
WH-TD20E3E5-UK
WH-TD30E3E5-UK
T & P Valve Dimension
Main Components
1. Hot water outlet – 19.05 mm (3/4"BSP)
2. Electrical box lid
3. Sensor socket – 12.70 mm (1/2"BSP)
4. Flow inlet – 19.05 mm (3/4"BSP)
5. Return outlet – 19.05 mm (3/4"BSP)
6. Cold water inlet – 19.05 mm (3/4"BSP)
7. Threaded Sensor hole for solar station connection
– 12.70 mm (1/2"BSP)
8. Anode connector – 19.05 mm (3/4"BSP)
9. T & P valve – 19.05 mm (3/4"BSP)
10. Sensor
15 mm
92
46
1/2”
BSP
2
9
1
8
10
Reset button
Safetycut-out
Thermostat
3
4
7
5
Electric element
5/4"BSP
6
9
197 mm for standard length probe valves
294 mm for 9” probe valves
32
148
205
65
46
Electrical Box Detail
300
1,8m2
765
600
800
100
410
575
1150
1,4m2
1250
100
148
148
580
Unit: mm
5. Water Cycle Diagram

Connection for WH-SDH series or equivalent.

Connection for WH-SDF / SDC series or equivalent.
10
6. Installation Instruction
6.1
WH-TD20E3E5 WH-TD30E3E5-1
Model
Capacity
(Litre)
WH-TD20E3E5
WH-TD30E3E5-1
198
287
Dimension (mm)
Height
Diameter
1150
580
1600
580
1
Main components
1. Hot water outlet – 19.05 mm (3/4"BSP)
2. Electrical box lid
3. Sensor socket – 12.70 mm (1/2"BSP)
4. Flow inlet – 19.05 mm (3/4"BSP)
5. Return outlet – 19.05 mm (3/4"BSP)
6. Cold water inlet – 19.05 mm (3/4"BSP)
7. Threaded Sensor hole for solar station connection
– 12.70 mm (1/2"BSP)
8. Anode connector – 19.05 mm (3/4"BSP)
Reset button
Safetycut-out
3
4
Thermostat
Height
7
Remove this jumper
when connecting
the Tank Unit to a
PanasonicAir-to-Water
Heatpump Indoor Unit
(except S*H model)
Accessory parts
A. 3-way valve
B. Sensor
C. Installation manual
D. Safety valve
E. Adjustable legs × 3
F. Anode bar
6.1.1
8
2
5
6
Electric element
5/4"BSP
Diameter
Detail of Electric Box
Piping and Wiring Installation
Obstacle
2 Anode bar insert
300 mm or
more
Hot water connection
Panasonic
7
6
Heating
B side
5
AB
A side
4 3-way valve
3 Safety valve
ore
or mt
m
m
n
600 to fro
Drain connection water
discharge (3/4"BSP)
Connection (1/2"BSP)
Water supply valve
(field supply)
11
Tee Joint
(field supply)
1
WARNING
This section is for authorized and licensed electrician / water system installer only.
Be sure to switch off all power supply (Tank Unit power supply, indoor unit power supply, heater power supply etc.)
before performing installation.
1
2
3
4
Install adjustable legs at bottom of tank (3 locations) then adjust the height until the unit stable.
Fix the anode bar into socket.
Install safety valve at water supply inlet, install drain appropriately.
Install 3-way valve at outlet tube of indoor unit, connect heating tube connection with tank pipe.
WARNING
Be careful on 3-way valve connecting direction
- “Default” condition is at Heating Side
- “On” condition is at Tank Unit
5 Insert sensor until it touches securely end of socket, tighten the cap of socket so that it is not shifted.
(Refer bottom diagram)
6 Connect the cable between heater and OLP, which located inside electrical box as shown at below section.
(Wiring at Tank Unit – (Electrical Box) and Wiring at Indoor Unit)
WARNING
Use cap tire cable (2.5 mm2) for wiring.
For S*H series, 3 cables are needed.
While, for other models, 5 cables is needed.
Fix the cables to the cord protector mountings with cable ties to ensure strain relief closely.
7 Insert the cables of 3-way valve, sensor & heater from bushing at the bottom of indoor unit.
Guide the wire inside the indoor unit with refer to the installation instruction of indoor unit.
Please keep the space for maintenance purpose (Top: above 300 mm / Front: above 600 mm)
12
6.1.1.1
Wiring at Tank Unit (Electrical box)
WH-S*H MODELS
WH-S*F / WH-S*C / WH-M*F / WH-M*C MODELS
Cap tire cable
(2.5 mm 2 × 5 cable)
6
5 Earth
BOOSTER HEATER
Cap tire cable
(2.5 mm 2 × 3 wires)
8
Earth
BOOSTER
HEATER
Must not change the volume knob.
6.1.1.2
7
14 13
TANK
OLP
Must not change the volume knob.
Wiring at Indoor Unit
Wiring of Indoor Unit Connection
(The wiring of indoor unit connection shall refer to individual's installation instruction for detail connection)
WH-S*H models
Terminals on the indoor
1
2
3
4
5
6
7
8
Lead wire cord
Sensor wire
Three-way Valve Cable
External Thermo Controller Cord
Booster Heater Cord
WH-S*F / WH-S*C / WH-M*F / WH-M*C models
3
4
5
6
OPEN
N
CLOSE
OPEN
N
7
8
9
10
11 12
COOL
2
N
1
CLOSE
Terminals on the indoor
13 14 15 16
17 18
Lead wire cord
Three-way
Valve Cable
Booster Heater
Cord
13
Receiver
Cable
HEAT
Two-way
Valve Cable
L
(Not applicable For
WH-S*F / WH-M*F)
Tank OLP
Cable
Tank
Sensor
Cable
External
Controller
Cable
6.1.2
Charge the Water
WARNING
Make sure Tank Unit filled up with water before switch on
the power.
1) Make sure all the piping installations are properly done.
2) Set the water supply valve “OPEN” and all hot water tap “OPEN”.
3) Start filling water to the Tank Unit. After 20 ~ 40 min, water should flow out from hot water tap.
Else, please contact your local authorized dealer.
4) Switch ON the power supply of the Indoor unit. Then set the indoor control panel to “Tank Connection” to “Yes”.
After that, change operation mode to “Tank Mode”. Make sure water pump running.
Else, please contact your local authorized dealer.
5) Check and make sure no water leaking at the tube connecting points.
6.1.3
Examine the Anode once a year
To protect the pressure vessel an anode is placed inside the tank. The anode will, depending on the water quality,
corrode. When diameter is approx. 8 mm the anode must be replaced.
It is easy to check and replace the anode
1) Turn off power supply.
2) Close water supply valve.
3) Manually open the safety valve and drain approx. 2ltrs..
4) Unscrew the anode, check and if necessary replace.
6.1.4
1)
2)
3)
4)
Discharge of Water
Turn off power supply.
Close water supply valve.
Open safety valve, by turning knob counter-clockwise until it stays open.
After discharge, close valve continue turning counter-clockwise until the valve snaps shut.
6.1.5
Precaution on Usage
 When using hot water, it must be mixed with water.
Please check the hot water’s temperature before using it.
(Hot water may cause scalding.)
 The water quality shall be in accordance with European Council Directive 98/83 EC, or revised version at the date
of installation, and is not fed with water from a private supply.
Particular: Chloride content:
Max. 250 mg/l
Sulphate content:
Max. 250 mg/l
Combination Chloride/sulphate: Max. 300 mg/l (in total)
14
6.2
WH-TD20E3E5-UK WH-TD30E3E5-UK
Model
Capacity
(L)
WH-TD20E3E5-UK
WH-TD30E3E5-UK
198
287
Dimension (mm)
Height
Diameter
1150
580
1600
580
Main components
1. Hot water outlet – 19.05 mm (3/4"BSP)
2. Electrical box lid
3. Sensor socket – 12.70 mm (1/2"BSP)
4. Flow inlet – 19.05 mm (3/4"BSP)
5. Return outlet – 19.05 mm (3/4"BSP)
6. Cold water inlet – 19.05 mm (3/4"BSP)
7. Threaded Sensor hole for solar station connection
– 12.70 mm (1/2"BSP)
8. Anode connector – 19.05 mm (3/4"BSP)
9. T&P valve – 19.05 mm (3/4"BSP)
10. Sensor
2
1
9
8
10
Reset button
Safetycut-out
Thermostat
3
4
7
Accessory parts
A. 3-way valve
B. Installation manual
C. Safety valve
D. Adjustable legs × 3
E. Anode bar
6.2.1
Weight (kg)
Empty
Full
49
247
65
352
5
6
Electric element
5/4"BSP
Detail of Electric Box
Piping and Wiring Installation
Obstacle
3
300 mm or more
Cold water supply
Pressure reducing valve
(field supply)
Safety valve
2 Anode bar insert
Hot water connection
6 Expansion vessel
<5
00
mm
9
B side
8
AB
Inlet pipe
5 Tundish
(field supply)
Tee joint
(field supply)
A side
Tee joint
(field supply)
>300 mm
10
Heating
(field supply)
<500 mm
Panasonic
7 3-way valve
4 Drain valve
(field supply)
1
WARNING
This section is for authorized and licensed electrician / water system installer only.
Be sure to switch off all power supply (Tank Unit power supply, indoor unit power supply, heater power supply etc.)
before performing installation.
15
Positioning the unit
The water heater should be fitted level on a hard surface with sufficient load strength to take the full weight of cylinder.
Adjustable feet are fitted to ensure the unit can be adjusted to a level position. There is no limitations regarding the
fitting distance from walls etc., but it is strongly recommended to ensure easy access to all pipe fitting etc. There
should be at least 80 cm of free space in front of the water heater to ensure easy access for servicing and
maintenance.
Protection from frost
If the water heater is in danger of being exposed to frost while not operating under electric power, the unit must be
drained to avoid damage. Make sure the electric power is turned off before draining, otherwise the heating elements
can be damaged and the warranty is void.
Installation
1 Install adjustable legs at bottom of tank (3 locations) then adjust the height until the unit stable.
2 Fix the anode bar into socket.
3 Install pressure reducing valve and safety valve at cold water supply, and connect water supply inlet through inlet
pipe.
4 Install drain valve appropriately.
5 Install the Tundish in a vertical position within a maximum of 600 mm from the temperature and Pressure Relief
Valve drain connection. Ensure the expansion relief pipework discharge through the tundish. Tundish pipework
must be 22 mm with a minimum vertical length of 300 mm below tundish. Maximum permitted length of 22 mm
pipework is 9 m. Each bend or elbow is equivalent to 0.8 m of pipework.
Discharge pipe
Connect the discharge from the tundish. This must have a continuous fall and be fitted in accordance with The
Building Regulations. The tundish should be installed away from electrical devices.
6 Install Expansion vessel and connect to inlet pipe using Tee joint.
7 Install 3-way valve at outlet tube of indoor unit, connect heating tube connection with tank pipe.
WARNING
Be careful on 3-way valve connecting direction
- “Default” condition is at Heating Side
- “On” condition is at Tank Unit
Insert sensor until it touches securely end of socket, tighten the cap of socket so that it is not shifted.
(Refer bottom diagram)
Connect the cable between heater and OLP, which located inside electrical box as shown at below section.
(Wiring at Tank Unit – (Electrical Box) and Wiring at Indoor Unit)
WARNING
Use cap tire cable (2.5 mm2) for wiring.
For S*H series, 3 cables are needed.
While, for other models, 5 cables is needed.
Fix the cables to the cord protector mountings with cable ties to ensure strain relief closely.
Insert the cables of 3-way valve, sensor & heater from bushing at the bottom of indoor unit.
Guide the wire inside the indoor unit with refer to the installation instruction of indoor unit.
Please keep the space for maintenance purpose (Top: above 300 mm / Front: above 600 mm)
16
6.2.1.1
Wiring at Tank Unit (Electrical box)
We are following UK Regulation KIWA
Guidance.
The tank is only for connection to
Panasonic heat pumps in below model
list.
WH-SxFxxxxxx
WH-SxCxxxxxx
WH-MxFxxxxxx
WH-MxCxxxxxx
Cap tire cable
(2.5 mm 2 × 5 cable)
8
7
Earth
BOOSTER
HEATER
14 13
TANK
OLP
Must not change the volume knob.
6.2.1.2
Wiring at Indoor Unit
Wiring of Indoor Unit Connection
(The wiring of indoor unit connection shall refer to individual's installation instruction for detail connection)
WH-S*H models
Terminals on the indoor
1
2
3
4
5
6
7
8
Lead wire cord
Sensor wire
Three-way Valve Cable
Booster Heater Cord
External Thermo Controller Cord
WH-S*F / WH-S*C / WH-M*F / WH-M*C models
3
4
5
6
OPEN
N
CLOSE
OPEN
N
7
8
9
10
11 12
COOL
2
N
1
CLOSE
Terminals on the indoor
13 14 15 16
17 18
Lead wire cord
Three-way
Valve Cable
Booster Heater
Cord
17
Receiver
Cable
HEAT
Two-way
Valve Cable
L
(Not applicable For
WH-S*F / WH-M*F)
Tank OLP
Cable
Tank
Sensor
Cable
External
Controller
Cable
6.2.2
Charge the Water
WARNING
Make sure Tank Unit filled up with water before switch on
the power.
1) Make sure all the piping installations are properly done.
2) Set the water supply valve “OPEN” and all hot water tap “OPEN”.
3) Start filling water to the Tank Unit. After 20 ~ 40 min, water should flow out from hot water tap.
Else, please contact your local authorized dealer.
4) Switch ON the power supply of the Indoor unit. Then set the indoor control panel to “Tank Connection” to “Yes”.
After that, change operation mode to “Tank Mode”. Make sure water pump running.
Else, please contact your local authorized dealer.
5) Check and make sure no water leaking at the tube connecting points.
6.2.3
1)
2)
3)
4)
5)
6)
Discharge of Water
Turn off power supply.
Close water supply valve.
Connect hose pipe to drain cock at base of cylinder.
Open a hot water tap to allow air inlet.
Open drain valve and open temperature & pressure relief valve.
After discharge, close a hot water tap and drain valve and temperature & pressure relief valve.
6.2.4
Corrosion Resistance
Duplex stainless steel is naturally corrosion resistant to mains water supply. No specific maintenance is required to
maintain this resistance. Please see guarantee terms for permissible water content.
Please note: This cylinders are not guaranteed for use with a private water supply.
The immersion heater can be removed to provide visual inspection access to the cylinder.
6.2.5
Precaution on Usage
When using hot water, it must be mixed with water.
Please check the hot water’s temperature before using it. (Hot water may cause scalding.)
18
6.2.6
Termination of Discharge Pipe
Download discharge at low level, i.e. up to 100 mm above external surfaces such as car parks, hard standings,
grassed areas etc, are acceptable providing that where children may play or otherwise come into contact with
discharges, a wire cage or similar guard is positioned to prevent contact, whilst maintaining visibility.
Discharge at high level, i.e. into a metal hopper and metal down pipe with end of the discharge pipe clearly visible
(tundish visible or not) or onto a roof capable of withstanding high temperature discharges of water and 3 m from any
plastic guttering system that would collect such discharges (tundish visible). Where a single pipe serves a number of
discharges, such as in blocks of flats, the number served should be limited to not more than 6 systems so that any
installation discharging can be traced reasonably easily. The single common discharge pipe should be at least one
pipe size larger than the largest individual discharge pipe to be connected. For further information contact your
Building Control Office or The British Board of Agreement.
Safety device
(e.g. temperature
relief valve)
Metal discharge pipe (D1)
from temperature
relief valve to tundish
600 mm
maximum
Tundish
300 mm
minimum
Discharge below
fixed grating
(3.61 gives alternative
points of discharge)
Discharge pipe (D2) from
tundish with continuous fall.
See 3.56, Table 1
and worked example
Fixed grating
Trapped gulley
Table 1
Product code
Max. design
pressure
Operating pressure
CW feed & coil
Pressure drop
Primary heater
Temp./pressure
Relief valve
Safety valve
Pressure/conn.
Exp. Vessel
pre charge
WH-TD20E3E5-UK
8bar
CW in 2bar, coil 2bar
0.09bar
90 - 95°C/10bar
8bar/15mm-1/2"
3.5bar
WH-TD30E3E5-UK
8bar
CW in 2bar, coil 2bar
0.11bar
90 - 95°C/10bar
8bar/15mm-1/2"
3.5bar
Product code
Actual
capacity
Heat-up (min)
coil
Rating (kW)
coil
Heat loss
kWh / 24h
Primary
Flow rate
Hot Water
Capacity
WH-TD20E3E5-UK
198 l.
21
26.9
1.9
(15 l/min, - 80°C)
179 l.
WH-TD30E3E5-UK
287 l.
32
22.8
2.3
(15 l/min, - 80°C)
237 l.
Table 2
19
7. Operation Control
7.1
Safety Valve
 Use commercial T-joint to joint connection (D) of
safety valve. Please install between water supply
inlet and water supply tube at below of front side of
main unit.
 Please connect discharge drain at connector (R).
During boiling, when pressure is above 9bar,
expanded water will come out and it is not
abnormality.
 Close the water supply main tap, open faucet and
turn the safety valve knob K to clockwise direction
until stopped at open position, and hot water from
tank can be discharged.
 When safety valve is not installed, tank may be
damage. It must be installed
7.2
Safety valve
Drain connection water
discharge (3/4"BSP)
Connection (1/2"BSP)
K
R
D
Water supply valve Tee Joint
(field supply) (field supply)
Thermostat
st
 1 stage Set 88°C (Can be cancelled by remote
control) Must not change the volume knob.
 2nd stage Set 95°C (Can be cancelled by
thermostat reset button).
 Reset button located on upper part of the
thermostat, this button will release and cut all
power to the heating element if the internal
temperature in the water heater rises above 98°C.
If this occurs, the function of the thermostat must
be checked by authorized personnel before the
reset button is pressed.
Reset button
Safety cut-out
Thermostat
Temperature
adjustment
Electric
element 5/4"
7.3
3-Way Valve
 The purpose of 3-way valve is to change the hot water flow to heating panel or to water tank.
 Control content
- During 3-way valve OFF, the hot water will supply to heating panel.
- During 3-way valve ON, the hot water will supply to water tank.
- During OFF condition, the 3-way valve will be switch to OFF position.
20
8. Troubleshooting Guide
Type of failure
Possible cause
No hot water
No power supply to the water
Heater.
The fuse or safety cut-off to operate.
No heating
Heating element or internal electrical
wiring out of order.
Water not warm enough
Heating element or the internal
electrical wiring partially out of order.
Safety valve (SV) is dripping
Leak warning outlet is dripping
Water expands when heated. If there
is no consumption of hot water over a
period of time pressure builds up,
causing the safety valve to open.
The heating element may not be
properly tightened, or there may be a
leak.
21
Diagnostic and what to do
Check if there is any power on the
power supply terminal on the
thermostat.
Press the reset button.
Check if there is any power on the
power supply on the connector of
the heating element. If this OK, press
the reset button on the fuse/safety cutoff.
Adjust the thermostat up using a std.
screwdriver.
Check the resistance of the heating
element on the connector of the heater
bundle, and the condition of the internal
wiring.
If drip from the SV is severe it might
need to be replaced. Some dripping is
normal. Alternatively an expansion
vessel can be fitted.
Check the heating element o-ring seal
and all connections.
9. Disassembly Instructions
9.1
Replacing the Heating Element
1
1. Disconnect the power cable.
2. Remove the electric box lid (1).
3. Open Safety Relief valve (2) for a few seconds to
relieve some of the pressure. This is done by
turning knob counter-clockwise. Close the valve
by turning the knob fully counter-clockwise until
snaps shut.
4. Disconnect all wires from the element.
5. Remove the element (3) by using an element
socket tool. Some water will flow from the element
connection when removing it.
6. Quickly clean the O-ring slot. Enter the new
heating element (3), with a new O-ring fitted, into
its connection. Important: Make sure the element
enters the thread correctly and that the O-ring is
placed in its correct position. Tighten element.
7. Refit the wires to the element in their correct
positions, tighten property.
8. Refit the electric box lid and reconnect the power
cable.
9.2
4
3
2
Fig. A
Replacing the Thermostat
1. Disconnect the power cable.
2. Remove the lid (1) covering the electric box.
3. Loosen screws (see Fig. B) and disconnect the
electric wires.
4. Remove thermostat (4) by pulling back slightly on
steel clip S using two fingers, then lifting the
thermostat slightly horizontally out of the clip
before removing it from the electrical box.
5. Replace thermostat by again pulling back on steel
clip S before slotting the new thermostat into
place.
6. Reconnect the wires to connections (see Fig. B),
tighten property.
Important: Refit the electric box lid before
reconnecting the power cable.
Note: All reference numbers relates Fig. A above.
9.3
1.
2.
3.
4.
5.
6.
Fig. B
Replacing the Sacrificial Anode
Inspect anode annually.
Cut the water supply at hot water outlet (1).
Open Safety Relief valve (3) for a few seconds to
relieve some of the pressure by turning knob (K)
counter-clockwise until it snaps shut.
Pull the anode 2/3 out of the tank for inspection.
Minimum diameter of anode is 8mm. If the anode
measures less than 8 mm in diameter in any
area, it must be replaced.
Reinstall/replace the anode and tighten properly.
Ensure the anode enters the threads correctly
and that its O-ring seal is in place.
Resume water supply at hot water outlet (1).
Fig. C
22
10. Technical Data
10.1 Tank Thermistor
10
Minimum
Standard
Maximum
9
8
Resistance (kΩ)
7
6
5
4
3
2
1
0
0
10
30
50
Temperature (°C)
23
70
90
110
11. Replacement Parts List
11.1 WH-TD20E3E5 WH-TD30E3E5-1
1
2
3
5
4
SAFETY
REF. NO.
4
6
6
7
7
QTY
WH-TD20E3E5
WH-TD30E3E5-1
ANODE
1
26200
26250
2
ELECTRIC BOX LID
1
74050
←
3
THERMOSTAT KIT
1
80060
←
4
5/4" HEATING ELEMENT 1 × 240V
1
71257
←
1
PART NAME & DESCRIPTION
5
THERMISTOR POCKET
1
81020
←
6
SAFETY RELIEF VALVE SV-2
1
90406
←
7
ADJUSTABLE FEET
3
60710
←
8
THERMISTOR SENSOR
1
81809
←
9
3-WAY VALVE
1
91999
←
10
ACTUATOR FOR VALVE
1
90252
←
(Note)
 The non numbered parts are not kept as standard service parts.
 All parts are supplied from PAPAEU, Germany.
24
REMARK
12. Replacement Parts List
12.1 WH-TD20E3E5-UK WH-TD30E3E5-UK
11
1
2
3
5
4
SAFETY
REF. NO.
4
6
6
7
7
PART NAME & DESCRIPTION
QTY
WH-TD20E3E5-UK
WH-TD30E3E5-UK
1
ANODE
1
56200
56250
2
ELECTRIC BOX LID
1
74050
←
3
THERMOSTAT KIT
1
80011
←
4
5/4" HEATING ELEMENT 1 × 240V
1
71257
←
5
THERMISTOR POCKET
1
81020
←
6
SAFETY RELIEF VALVE SV-2
1
90424
←
7
ADJUSTABLE FEET
3
60710
←
8
THERMISTOR SENSOR
1
81809
←
9
3-WAY VALVE
1
91999
←
10
ACTUATOR FOR VALVE
1
90252
←
11
SAFETY VALVE, T&P
1
92020
←
REMARK
(Note)
 The non numbered parts are not kept as standard service parts.
 All parts are supplied from PAPAEU, Germany.
Printed in Malaysia
SO0913-0
25
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