Ecodan EHPT15X-UKHLDW1S User manual

INSTALLATION MANUAL
IMPORTANT: PLEASE READ AND UNDERSTAND THESE INSTRUCTIONS
BEFORE COMMENCING INSTALLATION.
PLEASE LEAVE THIS MANUAL WITH THE CUSTOMER FOR FUTURE REFERNCE.
EHPT15X-UKHLDW1S
EHPT17X-UKHLDW1S
EHPT15X-UKHDW1S
EHPT17X-UKHDW1S
EHPT21X-UKHDW1S
EHPT21X-UKHDW1L
EHPT25X-UKHDW1L
EHPT30X-UKHDW1L
Renewable Heating Technology
January 2022
PRE-PLUMBED UNVENTED MAINS PRESSURE
WATER HEATER
WITH FTC6 CONTROL SYSTEM.
FOR USE WITH ECODAN PUZ-(H)WM
AIR SOURCE HEAT PUMP RANGE. Doc. No. 607431

2
Please read the following safety precautions carefully.
WARNING:
Precautions that must be observed to prevent injuries or death.
CAUTION:
Precautions that must be observed to prevent damage to unit.
This installation manual along with the user manual should be left with the product after installation for future reference.
Mitsubishi Electric is not responsible for the failure of locally-supplied parts.
• Be sure to perform periodical maintenance.
• Be sure to follow your local regulations.
• Be sure to follow the instructions provided in this manual.
MEANINGS OF SYMBOLS DISPLAYED ON THE UNIT
WARNING This mark is for R32 refrigerant only. Refrigerant type is written on nameplate of outdoor unit.
Read the OPERATION MANUAL carefully before operation.
Service personnel are required to carefully read the OPERATION MANUAL and INSTALLATION MANUAL before operation.
Further information is available in the OPERATION MANUAL, INSTALLATION MANUAL, and the likes.
SAFETY NOTICES
CONTENTS
SAFETY NOTICES...............................................................................................................................2
INTRODUCTION...................................................................................................................................4
GENERAL REQUIREMENTS ..............................................................................................................6
INSTALLATION – GENERAL..............................................................................................................18
INSTALLATION - DISCHARGE ..........................................................................................................21
INSTALLATION - HEAT PUMP PRIMARY CIRCUIT.........................................................................24
INSTALLATION - WI-FI ADAPTER.....................................................................................................37
INSTALLATION - IMMERSION HEATER ELECTRICAL SUPPLY ..................................................37
SYSTEM SET UP.................................................................................................................................38
COMMISSIONING...............................................................................................................................49
ENVIRONMENTAL INFORMATION...................................................................................................52
LOCAL APPLICATION FACTORS......................................................................................................52
TECHNICAL SUPPORT......................................................................................................................52

3
WARNING
Mechanical
The cylinder unit and outdoor unit must not be installed, disassembled, relocated, altered or repaired by the user. Ask an authorised installer or technician. If the unit is
ce capable of bearing its weight.
The cylinder unit should be positioned on a hard level surface nd or vibration.
Do not position furniture or electrical appliances below the outdoor unit or cylinder unit.
The discharge pipework from the emergency devices of the cylinder unit should be installed according to local law.
Only use accessories and replacement parts authorised by Mitsub
Electrical
n according to local regulations and the instructions given in this manual.
The units must be powered by a dedicated power supply and the correct voltage and circuit breakers must be used.
Wiring should be in accordance with national wiring regulations. Connections must be made securely and without tension on the terminals.
Earth unit correctly.
General
Keep children and pets away from both the cylinder unit and outdoor unit.
Do not use the hot water produced by the heat pump directly for drinking or cooking. This could cause illness to the user.
Do not stand on the units.
Do not touch switches with wet hands.
Annual maintenance checks on both the cylinder unit and the out
Do not place containers with liquids on top of the cylinder unit. If they leak or spill onto the cylinder unit damage to the
Do not place any heavy items on top of the cylinder unit.
refrigerant and do not allow air to remain in the lines. If air is mixed with the refrigerant, then it can be the cause of abnormal high pressure in the refrigerant line, and
may result in an explosion and other hazards.
lead to a serious impediment to securing product safety.
-
heat emitters in Zone2 circuit.
Do not install the unit where combustible gases may leak, be pr
Do not use means to accelerate the defrosting process or to clean, other than those recommended by the manufacturer.
heater).
Do not pierce or burn.
Be aware that refrigerants may not contain an odour.
Pipe-work shall be protected from physical damage.
The installation of pipe-work shall be kept to a minimum.
Compliance with national gas regulations shall be observed.
Keep any required ventilation openings clear of obstruction.
Do not use low temperature solder alloy in case of brazing the refrigerant pipes.
CAUTION
Use clean water that meets local quality standards on the primary circuit.
on manual.
The cylinder unit should be located inside to minimise heat loss.
Water pipe-runs on the primary circuit between outdoor and indoor unit should be kept to a minimum to reduce heat loss.
Ensure condensate from outdoor unit is piped away from the base to avoid puddles of water.
Remove as much air as possible from the primary and DHW circuits.
Refrigerant leakage may cause suffocation. Provide ventilation in accordance with EN378-1.
Be sure to wrap insulation around the piping. Direct contact with the bare piping may result in burns or frostbite.
Never put batteries in your mouth for any reason to avoid accidental ingestion.
Battery ingestion may cause choking and/or poisoning.
Do not transport the cylinder unit with water inside the DHW tank. This could cause damage to the unit.
If power to the cylinder unit is to be turned off (or system switched off) for a long time, the water should be drained.
If unused for a long period, before operation is resumed, DHW t
Preventative measures should be taken against water hammer, such as installing a Water Hammer Arrestor on the primary water circuit, as directed by the manufacturer.
As for the handling of refrigerant, refer to the outdoor unit installation manual.
SAFETY NOTICES

4
INTRODUCTION
This range of factory pre-plumbed and wired unvented water heaters are specically designed for use with the Ecodan
PUZ- (H)WM Air Source Heat Pump range. The cylinder is manufactured in the UK from top quality materials and meets
all the latest relevant safety and constructional standards. The high grade Duplex stainless steel cylinder o󰀨ers exceptional
strength and corrosion resistance. Its performance, control system and insulation levels exceed the latest requirements of
Building Regulation Part L.
The unvented water heater can be fed directly from the cold water mains supply to the property without the need for
separate feed cisterns or vent pipes. It is supplied tted with all its necessary inlet and safety controls for compliance with
Building Regulations. Also tted are heat pump circulating pump, heating zone 1 circulating pump, DHW circulating pump,
primary to DHW plate to plate heat exchanger, 3 way diverter valve, magnetic and cyclonic lter, scale trap, heat pump ow
and return thermistors, two cylinder thermistors, primary circuit drain o󰀨 valve, DHW circuit drain o󰀨 valve, DHW secondary
return tapping (210L+ only), low loss header, ow sensor, automatic air vent, primary lling loop and pressure gauge, a
cylinder thermal cut-out, WI-Fi adaptor and FTC6 controller. The pumps, motorised valve and thermal controls are supplied
pre-wired. The DHW expansion vessel is supplied loose for installation at a convenient position within the property. An
electric immersion heater is also tted to enable the unit to be heated should the heat pump require supplementary heating
or be turned o󰀨.
NOTE: When using a sealed heating system, adequate provision for expansion within the primary circuit MUST be
provided by tting a primary circuit expansion vessel. Primary circuit expansion cannot be accommodated within the Air
Source Heat Pump cylinder. A primary circuit pressure relief valve is tted within the Ecodan PUZ-(H)WM air source heat
pump outdoor unit.
The safety valves tted to the Air Source Heat Pump cylinder protect the water heater only. Failure to provide adequate
primary system pressure relief when using a sealed heating system will invalidate the Heat Pump warranty. Consult the
Heat Pump installation instructions for further advice.

5
IMPORTANT NOTE TO THE INSTALLER
The pre-plumbed cylinder is specically designed to be installed in conjunction with a Ecodan PUZ-(H)WM air source heat
pump. The pre-plumbed cylinder is available in either STANDARD 22mm, STANDARD 28mm or SLIMLINE models.
Please read these instructions before commencing installation. Unvented cylinders are a controlled service as dened in
the latest edition of the building regulations and should only be carried out by a competent, qualied installer. The relevant
regulations are:
England and Wales - Building Regulation Part G Section G3
Scotland - Technical Standard Section 4
Northern Ireland - Building Regulation Part F
After installation the Benchmark log book and included commissioning sheets must be completed and left along with these
instructions with the householder for future reference.
Any water distribution and central heating installation must comply with the relevant recommendations of the current version
of the Regulations and British Standards listed below:
Building Regulations
IEE Requirements for Electrical Installations (BS 7671)
Water Regulations
Manual Handling Operations Regulations
British Standards BS6798, BS5449, BS5540:1, BS5540:2, BS8558 and BS7593
Health and Safety Document No. 635
Only qualied and/or competent individuals should install the Ecodan system. Mitsubishi Electric’s notes must not be taken
as overriding statutory obligations.
An annual inspection of the system will be required to ensure safe, long term operation.
The information in this manual is provided to assist generally in the selection of equipment. The responsibility for the selection
and specication of the equipment must however, remain with the installer and any designers or consultants concerned
with the design, specication and installation of the system. Please note: Mitsubishi Electric does not therefore accept any
responsibility for matters of design, selection or specication or for the e󰀨ectiveness of an installation containing one of its
products unless specically requested to do so and expressly agreed in writing by Mitsubishi Electric at production stage.
All goods are sold subject to Mitsubishi Electric’s Terms and Conditions of Sale.
Important Note:
Included with the Ecodan product is information about how to register the Mitsubishi Electric user guarantee. Please direct
the end user to register within 3 months of commissioning and ensure they benet from the applicable standard guarantee
for their Ecodan heat pump and any cylinder or interfacing equipment purchased from Mitsubishi Electric by you as installer.
The guarantee applies where the installation address is in England, Scotland or Wales only and for domestic use.
This registration should be completed only by the end user/system owner so please ensure that the information about how
to register the Mitsubishi Electric user guarantee reaches them. There are various options to register the guarantee and
details can be found online at https://les.mitsubishielectric.co.uk The registration is logged by our warranty department. In the
unlikely event of failure of the Ecodan heat pump or any such cylinder or interfacing equipment purchased from Mitsubishi
Electric, registration of the guarantee ensures that warranty claims are processed e󰀩ciently. For further information on the
Mitsubishi Electric user guarantee please contact us by email: [email protected] or telephone [phone].
Please Note:
If you do not register the Mitsubishi Electric user guarantee then the product will only be guaranteed to the user by Mitsubishi
Electric for 12 months from the date of commissioning.
Our commercial guarantee to your user does not a󰀨ect your user’s statutory rights or any consumer rights under applicable
national legislation.
NOTE: This manual is for revision A products only, manufactured on or after week 8 2022
see DATA label and drawing below for details
Year Week Revision
Serial No
XYZ22080001AC

6
GENERAL REQUIREMENTS
IMPORTANT: THIS APPLIANCE CAN BE USED BY CHILDREN AGED FROM 8 YEARS AND ABOVE AND PERSONS
WITH REDUCED PHYSICAL SENSORY OR MENTAL CAPABILITIES OR LACK OF EXPERIENCE AND KNOWLEDGE IF
THEY HAVE BEEN GIVEN SUPERVISORY OR INSTRUCTION CONCERNING USE OF THE APPLIANCE IN A SAFE WAY
AND UNDERSTAND THE HAZARDS INVOLVED. CHILDREN SHALL NOT PLAY WITH THE APPLIANCE. CLEANING AND
USER MAINTENANCE SHALL NOT BE MADE BY CHILDREN WITHOUT SUPERVISION.
WARNING: Do not switch on if there is a possibility that the water in the heater is frozen.
COMPONENT CHECK LIST: Before commencing installation check that all the components for your Air Source Heat Pump
cylinder are contained in the package. The following components are supplied with your unit:
Factory tted:
Temperature and Pressure Relief Valve (set at 90°C/10bar)
Immersion heater and over-temperature cut-out
Expansion relief valve (comprises of expansion valve and check valve)
Tundish
Heat pump circulating pump - Grundfos UPM3L 25-75 130AZA
Heating zone 1 circulating pump - Grundfos UPM3 AUTO 25-70 130
DHW circulating pump - Grundfos UPSO 15-60 CIL 2
3 Way motorised diverter valve
Primary to DHW plate to plate heat exchanger
Primary drain o󰀨 valve & DHW drain o󰀨 valve
Fernox TF1 Sigma Magnetic lter
Primary circuit lling loop
Primary circuit pressure gauge
Scale trap
Low loss header
Flow sensor
Flow water temp and return water temp thermistors
Cylinder temp thermistors
Automatic air vent
WI-Fi adaptor
SD Card
FTC6 Controller
Supplied loose:
Main Remote Controller & Remote Controller Cable (10m)
FTC instructions
Potable water expansion vessel + bracket
Cold water combination valve (comprises pressure reducing valve, strainer, check valve)
STORAGE AND HANDLING
Prior to installation the Pre-plumbed cylinder unit must be stored vertically upright on a secure, level surface in a dry, frost free
environment. Take note of the weight of the product and follow safe working practices when lifting, moving or manipulating into
position. DO NOT use the pre-plumbed pipework for lifting or positioning the cylinder. It is the responsibility of the installer to
ensure all mechanical joints on the cylinder and pre-plumbed pipework are checked for tightness prior to lling the system,
as these can become loose during transportation and positioning of the unit.
SITING THE UNIT
The Pre-plumbed cylinder unit must be vertically oor mounted. It can be placed anywhere convenient provided the discharge
pipe(s) from its safety valves can be correctly installed and all pre-tted ancillary parts can be accessed for servicing and/or
maintenance. Areas that are subject to freezing must be avoided. Ensure that the oor is of su󰀩cient strength to support the
“full” weight of the unit (Table 1, page 7). Pipe runs should be kept as short as possible for maximum economy.
Additional automatic air vents (AAV) (not supplied) may be required at high points in the primary system where pipework is
located above the level of the cylinder. After lling the system (primary circuit), release all trapped air using air vents during
and following heating period and top up with water as necessary. After removing the air, automatic air vent(s) MUST be closed.
WATER SUPPLY
Bear in mind that the water supply to the property will be supplying both the hot and cold water requirements simultaneously.
It is recommended that the maximum water demand is assessed and the water supply checked to ensure this demand can
be satisfactorily met.
NOTE: A high water pressure will not always guarantee high ow rates.
Wherever possible the cylinder supply pipe should be 22mm. We suggest the minimum supply requirements should be 1.5
bar pressure and 20 litres per minute ow rate. However, at these values outlet ow rates may be poor if several outlets are
used simultaneously. The higher the available pressure and ow rate the better the system performance.
The cylinder has an operating pressure of 3.5 bar which is controlled by the cold water combination valve assembly. The cold
water combination valve assembly can be connected to a maximum inlet pressure of 16 bar.

7
OUTLET/TERMINAL FITTINGS (TAPS, ETC.)
The Pre-plumbed cylinder can be used in conjunction with most types of terminal ttings, plumbing ttings and pipework.
However, the rated pressures of any ttings selected should be checked for compatibility before installation.
NOTE: Accessories, plumbing ttings and pipe work should have a rated operating pressure of at least 8 bar.
Outlets situated higher than the cylinder will give outlet pressures lower than that at the unit, a 10m height
di󰀨erence will result in a 1 bar pressure reduction at the outlet tting.
LIMITATIONS
The Pre-plumbed cylinder should not be used in association with any of the following:
• Solid fuel boilers or any other boiler in which the energy input is not under e󰀨ective thermostatic control, unless additional
and appropriate safety measures are installed.
• Ascending spray type bidets or any other class 1 back syphonage risk require that a type A air gap be employed.
• Steam heating plants unless additional and appropriate safety devices are installed.
• Situations where maintenance is likely to be neglected or safety devices tampered with.
• Water supplies that have either inadequate pressure or where the supply may be intermittent.
• Situations where it is not possible to safely pipe away any discharge from the safety valves.
• In areas where the water consistently contains a high proportion of solids, e.g. suspended matter that could block the
strainer unless adequate ltration can be ensured.
OPERATIONAL SUMMARY
Maximum mains supply pressure 1.6 MPa (16 bar)
Operating pressure 0.35 MPa (3.5 bar)
Expansion vessel pressure 0.35 MPa (3.5 bar)
Maximum design (Rated) pressure 0.8 MPa (8 bar)
Expansion relief valve setting 0.8 MPa (8 bar)
T&P relief valve setting 90°C/1.0 MPa (10 bar)
T&P relief valve manufacturers ref RWC PTEM 510003
Maximum primary circuit pressure 0.3 MPa (3 bar)
Maximum heating uid temperature 85oC
Storage capacity See Table 1 below
Weight when full See Table 1 below
OUTLINE SPECIFICATIONS
The cylinders are designed, constructed and tested for compliance with BS EN 12897:2016
Outer casing: White pre-painted corrosion resistant steel
Water container: Duplex stainless steel. 100% pressure tested to 1.5 MPa (15 bar).
Thermal insulation: CFC/HCFC free re retardant expanded polyurethane foam with zero ozone depletion potential. It has a
Global Warming Potential (GWP) of 3.1. Nominal thickness: Standard units 60mm - Slimline units 50mm.
Table 1 - Unit Weights & Standing Heat Loss
Model Type
Nominal
Capacity
(litres)
Weight of
full unit (kg)
Weight of
unit (kg)
Standing Heat Loss
per day (kWh/24h) per year (kWh/365d)
Standard 150 205 55 1.15 419.7
Standard 170 228 58 1.23 448.9
Standard 210 (Small) 274 64 1.53 558.5
Standard 210 (Large) 278 68 1.53 558.2
Standard 250 324 74 1.80 657.0
Standard 300 382 82 2.06 751.9
Slimline 150 209 59 1.40 511.0
Slimline 170 233 63 1.59 580.4
IMPORTANT INSTALLATION NOTE
WHERE THE INLET SUPPLY TO THE PRESSURE REDUCING VALVE (PRV) IS ROUTED THROUGH A HEATED SPACE
AND IS FITTED WITH A CHECK VALVE OR OTHER FITTING THAT WOULD PREVENT BACK FLOW, HIGH PRESSURES
CAN BE EXPERIENCED IN THE INLET PIPE DUE TO WARMING THAT CAN CAUSE DAMAGE TO THE PRV OR OTHER
FITTINGS ON THE INLET SUPPLY. IN THESE CIRCUMSTANCES, THE INSTALLATION OF A MEANS TO ACCOMMODATE
EXPANSION AND THUS LIMIT THE PRESSURE RISE IN THE INLET PIPE IS RECOMMENDED. REFER TO THE
INSTALLATION SECTION FOR FURTHER DETAILS.

8
Fig. 1 - Parts Identication
Indicative Performance
Nominal capacity Type Hot water capacity Reheat time Nominal heat input
(litres) (litres) (minutes) (kW)
150 Slimline 144 92 4.83
170 Slimline 175 69 7.85
150 Standard 153 65 7.20
300 Standard 301 172 5.38
Average 6.32
NOTE: Heating times achieved using an Air Source Heat Pump with variable output power and boost heating to 60°C using
a 3kW immersion heater and a primary (heat pump) ow rate of 20 l/min. Test method in accordance with EN12897:2006
Flow sensor
(behind controller)
Heat Pump circulating
pump
3 Way motorised
diverter valve
Low loss header
Automatic Air Vent
FTC6 Controller
Immersion heater
housing
Primary circuit
pressure gauge
Primary circuit
drain off point
Heating zone 1
circulating pump
THW5A thermistor boss
Temperature/Pressure
Relief Valve
Expansion Valve
Tundish
DHW circulating
pump
Scale Trap
DHW Drain off
point
Plate to Plate heat
exchanger
Magnetic filter
Expansion vessel
tapping
Hot Water Outlet

9
KEY
A OVERALL HEIGHT
B SECONDARY RETURN TAPPING
C HEAT PUMP FLOW CONNECTION (28mm O/D COPPER)
D TUNDISH OUTLET CONNECTION (22mm COMPRESSION)
E HEAT PUMP RETURN CONNECTION (28mm O/D COPPER)
F HEATING ZONE 1 CIRCUIT FLOW CONNECTION (22mm O/D COPPER)
G HEATING ZONE 1 CIRCUIT RETURN CONNECTION (22mm O/D COPPER)
H COLD WATER INLET CONNECTION (22mm COMPRESSION)
I HOT WATER OUTLET CONNECTION (22mm COMPRESSION / 3/4” BSP M)
J THW5A SENSOR POCKET
K WI-FI ADAPTOR (INCLUDED, INSTALLER TO LOCATE AND MOUNT)
CAPACITY 210 250 300
A1509 1761 2075
B1050 1175 1385
C1370 1370 1370
D880 1136 1450
E1370 1370 1370
F270 270 270
G350 350 350
J925 1005 1193
KInstaller to locate and mount
Fig. 2a - Dimensions and EU Product Fiche - 28mm Standard Models
MODEL
Energy e󰀩ciency
class C C C
Standing loss in W 65.0 75.0 85.8
Storage volume V in
Litres 210 250 300
Technical parameters in accordance with European Commission regulations 814/2013 and 812/2013
755
748
579
C & E
BAD
F
G
J
I
H
C E
K
EHPT21X-UKHDW1L
EHPT25X-UKHDW1L
EHPT30X-UKHDW1L

10
KEY
A OVERALL HEIGHT
B SECONDARY RETURN TAPPING (NOT FITTED TO EHPT15X-UKHDW1S/ EHPT17X-UKHDW1S)
C HEAT PUMP FLOW CONNECTION (22mm O/D COPPER)
D TUNDISH OUTLET CONNECTION (22mm COMPRESSION)
E HEAT PUMP RETURN CONNECTION (22mm O/D COPPER)
F HEATING ZONE 1 CIRCUIT FLOW CONNECTION (22mm O/D COPPER)
G HEATING ZONE 1 CIRCUIT RETURN CONNECTION (22mm O/D COPPER)
H COLD WATER INLET CONNECTION (22mm COMPRESSION)
I HOT WATER OUTLET CONNECTION (22mm COMPRESSION / 3/4” BSP M)
J THW5A SENSOR POCKET
K WI-FI ADAPTOR (INCLUDED, INSTALLER TO LOCATE AND MOUNT)
CAPACITY 150 170 210
A1131 1257 1509
BNot tted Not tted 1050
C1122 1122 1122
D505 630 880
E1122 1122 1122
F194 194 194
G350 350 350
J675 815 925
KInstaller to locate and mount
MODEL
Energy e󰀩ciency
class B B C
Standing loss in W 47.9 51.2 63.7
Storage volume V in
Litres 150 170 210
Technical parameters in accordance with European Commission regulations 814/2013 and 812/2013
Fig. 2b - Dimensions and EU Product Fiche - 22mm Standard Models
756
730
579
C & E
BAD
J
C E
I
H
K
F
G
EHPT15X-UKHDW1S
EHPT17X-UKHDW1S
EHPT21X-UKHDW1S

11
KEY
A OVERALL HEIGHT
B HEAT PUMP FLOW CONNECTION (22mm O/D COPPER)
C TUNDISH OUTLET CONNECTION (22mm COMPRESSION)
D HEAT PUMP RETURN CONNECTION (22mm O/D COPPER)
E HEATING ZONE 1 CIRCUIT FLOW CONNECTION (22mm O/D COPPER)
F HEATING ZONE 1 CIRCUIT RETURN CONNECTION (22mm O/D COPPER)
G COLD WATER INLET CONNECTION (22mm COMPRESSION)
H HOT WATER OUTLET CONNECTION (22mm COMPRESSION / 3/4” BSP M)
J THW5A SENSOR POCKET
K WI-FI ADAPTOR (INCLUDED, INSTALLER TO LOCATE AND MOUNT)
CAPACITY 150 170
A1516 1690
B1127 1127
C909 1083
D1127 1127
E194 194
F350 350
J943 1117
KInstaller to locate and mount
Fig. 2c - Dimensions and EU Product Fiche - 22mm Slimline Models
MODEL
Energy e󰀩ciency
class C C
Standing loss in W 58.3 66.3
Storage volume V in
Litres 150 170
Technical parameters in accordance with European Commission
regulations 814/2013 and 812/2013
676
654
491
B & D
A
J
C
G
H
B D
K
E
F
EHPT15X-UKHLDW1S
EHPT17X-UKHLDW1S

12
Table 2 - STANDARD Cylinder Technical Data
150 170 210 (Small) 210 (Large) 250 300
Primary flow rate (H) WM 50/60/85/112/140 Pump Connec�on size Hea�ng/DHW (mm)
DHW Expansion vessel (litres) 12 18 18 18 24 24
Charge pressure (MPa (bar))
Control thermistor (oC)
Pressue Relief Valve (MPa (bar)) Control thermistor (oC) Over-temperature cut-out (oC)
Temp/Pressure Relief Valve (oC/MPa (bar))
Expansion valve (MPa (bar))
Width
Depth
Height
Vessel
Type Nominal thickness (mm)
Standing heat loss (kWh/24h)
Ozone Deple�on Poten�al
Global Warming Poten�al
Electrical supply Phase Fuse ra�ng - MCB Size (A)
Electrical supply Phase Ra�ng (kW at 240V) Max current (A)
Fuse ra�ng - MCB Size (A)
PAR-WT50-E controller & PAR-WR51-E receiver
zero
3.1
220 - 240 V ~ , 50Hz
single
16
220 - 240 V ~ , 50Hz
single
3
13
16
DHW and 1 hea�ng zone *
80 +/- 5
90 / 1.0 (10.0)
0.8 (8.0)
Duplex stainless steel
Expanded polyurethane (PU)
60
Mechanical zones
Op�onal wireles room thermostat and wireless receiver
STANDARD
0.35 (3.5)
22/22 28/22
Heat Pump - Grundfos UPM3L 25-75 130AZA Hea�ng - Grundfos UPM3 AUTO 25-70 130
DHW - Grundfos UPSO 15-60 CIL2
14/17/24/32/40 l/min
80
0.3 (3.0) Contained within outdoor unit
75
Dimensions (mm)
Weight empty/full (kg)
Materials
Insula�on
Electrical data
Control Board
(op�onally powered
by outdoor unit)
Immersion heater
UNIT
Nominal hot water capacity (litres)
Water
Safety devices
Primary circuit
DHW circuit
748748 748
756 756 756 730 730 730
755755 755
1131 1257 1509 17611509 2075
1.53 1.80 2.09
55/205 58/228 64/274 74/32468/278 82/382
* Optional 2-zone accessory pack available
1.15 1.23 1.53

13
Table 3 - SLIMLINE Cylinder Technical Data
150 170
Primary flow rate (H)WM50/60/85
Pump Connec�on size Hea�ng/DHW (mm)
DHW Expansion vessel (litres) 12 18
Charge pressure (MPa (bar))
Control thermistor (°C)
Pressue Relief Valve (MPa (bar)) Control thermistor (°C)
Over-temperature cut-out (°C)
Temp/Pressure Relief Valve (°C/MPa (bar)) Expansion valve (MPa (bar))
Width
Depth
Height
Vessel
Type Nominal thickness (mm)
Standing heat loss (kWh/24h)
Ozone Deple�on Poten�al
Global Warming Poten�al
Electrical supply
Phase Fuse ra�ng - MCB Size (A)
Electrical supply
Phase Ra�ng (kW at 240V) Max current (A)
Fuse ra�ng - MCB Size (A)
PAR-WT50-E controller & PAR-WR51-E receiver
zero
3.1
220 - 240 V ~ , 50Hz
single
16
220 - 240 V ~ , 50Hz
single
3
13 16
DHW and 1 hea�ng zone*
80 +/- 5
90 / 1.0 (10.0)
0.8 (8.0)
Duplex stainless steel
Expanded polyurethane (PU)
50
Mechanical zones
Op�onal wireles room thermostat and wireless receiver
SLIMLINE
0.35 (3.5)
22/22
14/17/24 l/min
80
0.3 (3.0) Contained within outdoor unit
75
Dimensions (mm)
Weight empty/full (kg)
Materials
Insula�on
Electrical data
Control Board (op�onally powered by outdoor unit
Immersion heater
UNIT
Nominal hot water capacity (litres)
Water
Safety devices
Primary circuit
DHW circuit
676 676 654 654
1516 1690
59/209 63/233
1.40 1.59
*Optional 2-zone accessory pack available
Heat Pump - Grundfos UPM3L 25-75 130AZA Hea�ng - Grundfos UPM3 AUTO 25-70 130 DHW - Grundfos UPSO 15-60 CIL2

14
0
1
2
3
4
5
6
7
8
9
0,0 0,5 1,0 1,5 2,0 2,5 3,0 3,5
H [m]
Q [m3/h]
QH Chart
0
10
20
30
40
50
60
70
80
0,0 0,5 1,0 1,5 2,0 2,5 3,0 3,5
P1 [W]
Q [m3/h]
Power Chart
Graph 1 - UPM3L 25-75 130AZA Performance Curves
Pump speed can be selected by main remote controller setting (see Graph 1, red curves).
Adjust the pump speed setting so that the ow rate in the primary circuit is appropriate for the outdoor unit installed.
It may be necessary to add an additional pump to the system depending on the length and lift of the primary circuit. If
the additional pump(s) have current greater than 1A please use appropriate relay. If the second pump is being used in
the primary circuit between the cylinder unit and the outdoor unit then the signal cable should be wired to TBO.1 termi-
nals 1 and 2 (OUT1). In this position the pump speed MUST match the speed of the cylinder unit’s in-built pump.
Five pump speed control is available via FTC6 control.
HEAT PUMP CIRCULATION PUMP (GRUNDFOS UPM3L 25-75 130AZA)

15
HEATING ZONE 1 CIRCULATION PUMP (GRUNDFOS UPM3 AUTO 25-70 130)
When you switch on the pump it will run to the pre-set position or the last setting. The diagram below shows the current
operation status.
To change the pump setting, follow below:
(a) Press the ‘ ’ to switch to the settings view. The LEDs show the current setting for 2 seconds.
(b) Release ‘ ’ for more than 2 seconds. The user interface shows the current performance in “operation status”.
(c) Press ‘ ’ for more than 2 seconds and the circulator switches to “setting selection”. The LEDs ash and show the
current setting mode. Please note that if the key lock is disabled, the circulator will not switch to “setting selection”.
In this case, unlock the key lock by pressing the button for 10 seconds.
(d) During a period of 10 seconds, press shortly on the ‘ ’ and the pump switches to the next setting.
(e) To select between the settings, instantly press the button until you nd the setting you want. If you pass the setting,
you will need to continue until the setting appears again. It is not possible to go back.
(f) Release ‘ ’ for more than 10 seconds and the user interfaces switches back to the performance view and the last
setting is stored.
(g) Press ‘ ’ and the display switches to the setting view and the LEDs show the current setting for 2 seconds.
(h) Release ‘ ’ for more than 2 seconds and the user interface switches back to the performance view.
1
1
1
2
2
2
3
3
3
AUTOADAPT
AUTOADAPT
MOD E U PM3 xx-70
MOD E U P M3 x x-7 0
MODEU PM 3 x x-7 0
PRE-SET
MAX
Green LED
Yellow LED
LED not illuminated
KEY

16
Graph 2 - UPM3 performance curve
Proportional pressure
The head pressure is reduced at falling heat demand
and increased at rising heat demand.
The duty point of the circulator will move up or down on
the selected proportional pressure curve depending on
the heat demand in the system.
• PP1: Lowest proportional
pressure curve
• PP2: Intermediate
proportional pressure
curve
• PP3: Highest proportional
pressure curve
• AUTOADAPT
Constant pressure
The head pressure is kept constant, irrespective of the
heat demand.
The duty point of the circulator will move out or in on
the selected constant pressure curve, depending on the
heat demand in the system.
Constant curve
The circulator runs on a constant curve, which means
that it runs at a constant speed or power.
The duty point of the circulator moves up or down the
selected curve, depending on the heat demand in the
system.
• CP1: Lowest constant
pressure curve
• CP2: Intermediate constant
pressure curve
• CP3: Highest constant
pressure curve
• AUTOADAPT
Control Mode explanation

17
Graph 3 - Cylinder Pressure Drop
0.00
0.20
0.40
0.60
0.80
1.00
1.20
5 10 15 20 25 30 35 40 45 50
Pressure drop (bar)
Flow rate (l/min)
Pressure Drop for Large Cylinder Models (28mm)
Space Hea�ng
Circuit
Hot Water
Circuit
0.00
0.50
1.00
1.50
2.00
2.50
5 10 15 20 25 30 35 40 45 50
Pressure drop (bar)
Flow rate (l/min)
Pressure Drop for Small Cylinder Models (22mm)
Space Hea�ng
Circuit
Hot Water
Circuit

18
INSTALLATION – GENERAL
PIPE FITTINGS
The connection points to the heating system are in 22mm copper pipe. The use of appropriately sized COMPRESSION
FITTINGS is recommended when connecting to the pipes. Solder ttings can be used, but extreme care must be taken to
ensure any ancillary components in close proximity are not damaged by heat. Push t type ttings can be used for connection
to the copper pipes.
The inlet connection to the cold water combination valve is 22mm compression. The cylinder outlet tting is suitable for
connection to 22mm o/dia pipe (compression nut and olive supplied). The outlet is also threaded 3/4” BSP male parallel
should threaded pipe connections be preferred.
COLD FEED
A 22mm cold water supply is recommended, however, if a 15mm (1/2”) supply exists which provides su󰀩cient ow, this may
be used. More ow noise may be experienced from small bore pipes due to the increased water velocity through them.
A stopcock or servicing valve should be incorporated into the cold water supply to enable the cylinder and its associated
controls to be isolated and serviced.
PRESSURE REDUCING VALVE (Fig. 3 below)
The 3.5 bar pressure reducing valve can be connected anywhere on the cold water mains supply prior to the Air Source
Heat Pump cylinder. There is no requirement to site it close to the unit, it can be located at a point where the mains supply
enters the premises if this is more convenient but a non-return valve must be installed just after the reducing valve for ease
of maintenance.
PRV WARNING: IF THERE IS AN UPSTREAM CHECK VALVE OR FITTING WHICH MAY PREVENT BACK FLOW THEN
HIGH PRESSURES CAN BE EXPERIENCED DUE TO AMBIENT TEMPERATURES WHICH CAN CAUSE DAMAGE TO
THE VALVES AND FITTINGS
Fig. 3 - Pressure reducing valve Fig. 4 - Pressure relief valve (8 bar)
PRESSURE RELIEF VALVE (Fig. 4 above)
Should a balanced pressure cold water supply be required to cold water outlets such as thermostatic shower mixer valves or
combination taps, the cold water balanced draw o󰀨 connection should be taken from between the pressure reducing valve
and the pressure relief valve (see Fig. 4 above). Branches to cold drinking water outlets should be taken directly from the
mains supply.
EXPANSION VESSEL
The expansion vessel accommodates expansion that results from heating the water inside the unit. The expansion vessel
is pre-charged at 3.5 bar. The expansion vessel must be connected between the expansion valve (see Fig. 4 above) and
the cylinder by connecting it to the expansion vessel tapping on the cold feed pipe (see Fig. 1 for position of tapping). The
location of the expansion vessel should allow access to recharge the pressure as and when necessary, this can be done
using a normal car foot pump. It is recommended that the expansion vessel is adequately supported. An expansion vessel
wall mounting bracket is supplied for this purpose and should be tted.
TUNDISH
The tundish is supplied factory tted . Ensure it is not postitioned directly over any electrical device in case any water splashes
occur in the event of a safety valve discharge.
CHECKS
The function of the following safety components of the cylinder unit should be checked on installation for any abnormalities;
• Pressure relief valve (Primary circuit and Tank)
• Expansion vessel pre-charge (gas charge pressure)
22mm compression connection
Outlet to cylinder
From cold water
combination
valve
Take note of flow
direction
Pressure relief valve
discharge connection
Pressure relief valve
“TEE” (incorporates
check valve)
Outlet to cylinder
Mains in
22mm compression connection
Take note of flow
direction
Pressure reducing valve
cartridge (3.5 Bar)

19
DRAIN TAPS
Drain taps are tted to both the primary system pipe work and to the cold water inlet to facilitate draining the unit or indirect
heating circuit for maintenance purposes. It is recommended that the outlet point of the drain pipe work be at least 1 metre
below the level of the heater (this can be achieved by attaching a hose pipe to the drain tap outlet spigot).
HOT WATER OUTLET
Ideally the pipe work from the cylinder to the outlet ttings should be in 22mm pipe with short runs of 15mm pipe to showers
and basin taps. Small bore pipe can also be used to suit some taps, but runs should be of minimum length. Pipe sizes may
vary due to system design.
SECONDARY CIRCULATION
If secondary circulation is required it is recommended that it be connected to the cylinder as shown in Fig. 5 below via a swept
tee joint into the cold feed to the unit. Note: 210L, 250L & 300L Standard models only have a secondary return tapping.
The secondary return pipe should be in 15mm pipe and incorporate a check valve to prevent back ow. A suitable WRAS
approved bronze circulation pump will be required. On large systems, due to the increase in system water content, it may be
necessary to t an additional expansion vessel to the secondary circuit. This should be done if the capacity of the secondary
circuit exceeds 10 litres.
Pipe capacity (copper):
15mm O.D. = 0.13 l/m (10 litres = 77m)
22mm O.D. = 0.38 l/m (10 litres = 26m)
28mm O.D. = 0.55 l/m (10 litres = 18m)
Fig. 5 - Secondary circulation connection
AB
CD
T&P RELIEF
VALVE
DISCHARGE
PIPEWORK
TO TUNDISH
LEFT HAND
INSULATING
PIECE
PLASTIC COVER CLIP COVER INTO
PLACE
RIGHT HAND
INSULATING
PIECE
Fig. 6 - T&P Relief Valve insulation
WARNINGS
i) Under no circumstances should the factory tted temperature/pressure relief valve be removed other than by authorised
service personnel. To do so will invalidate any guarantee or claim.
ii) The cold water combination valve must be tted to the mains water supply to the unit.
iii) No control or safety valves should be tampered with.
iv) The discharge pipe should not be blocked or used for any other purpose.
v) No other valves should be placed between the expansion relief valve and the cylinder.
Cold inlet
connection
Check
valve
Secondary
circulation
pump
Swept
tee
Cold
supply
Secondary
return
INSULATION OF PIPEWORK
i) All exposed water pipework should be insulated to
prevent unnecessary heat loss and condensation.
ii) Cold and hot water pipework should not be run close
together where possible, to avoid unwanted heat
transfer.
iii) Pipework between outdoor heat pump unit and cylinder
unit should be insulated with suitable pipe insulation
material with a thermal conductivity of ≤ 0.04 W/mK.

20
Fig. 7 - Schematic installation diagram
Balanced cold water draw-off
HWS supply
Balanced HWS and MCWS to bathrooms, showers, cloakrooms, etc.
To space heating circuit Zone 1
1
2
3
4
5
6
7
MCWS to Kitchen (unbalanced cold mains supply)
Incoming Cold Water Main
8
9
10
11
12
13
14
15 16
17
18
19
20
21
22
23
26
25
24
27
Parts shown within dashed line are supplied
Back flow prevention
Device (if fitted)
NOTE: If a device that prevents backflow is installed on the cold water supply to the PRV then a means of
accommodating expansion
due to local warming of the
pipe is recommended to be
fitted between the Device and PRV.
NOTE: A backflow prevention Device may include check valves, a water meter or an additional PRV
29 2830*
28 29
Discharge pipe to atmosphere (see page “Installation - Discharge”)
KEY 1 Heat Pump 13 Scale Trap 25 Primary circuit draw o󰀨 point 2 Cylinder 14 DHW Circulating Pump 26 Automatic Air Vent 3 FTC6 Controller 15 Flow Sensor 27 Di󰀨erential Pressure Bypass Valve 4 Immersion heater 16 Primary Pump 28 Strainer 5 3.5 bar Pressure reducing Valve incorporating 17 Primary Expansion Vessel 29 Isolating Valve Strainer and Check Valve (supplied loose) 18 Primary Pressure Relief valve 30 Air Vent* - 6 8 bar Expansion Valve and Check Valve 19 Magnetic Filter 7 DHW Expansion Vessel (supplied loose) 20 Primary System Pressure Gauge 8 Stop Cock 21 3 Way Motorised Diverter Valve 9 Mains Stop Cock 22 Low Loss Header incorporating ports for 10 Tundish 2nd heating zone and alternative heat source 11 Temperature/Pressure relief Valve 23 Heating Pump 12 Plate to Plate Heat Exchanger 24 DHW Draino󰀨 point
if the outdoor unit is higher than the indoor unit or if there is a location where aire gets trapped in the upper part of the water pipe consider adding this part