Mitsubishi Electric ecodan PUHZ-W50VHA2 User manual

Product Information
Designed to meet
the demands of
today’s heating
needs
Our range of Ecodan monobloc air source heat pumps includes
5, 8.5, 11.2 and 14kW sizes. Now with the ability to cascade up to six
units of the same output, Ecodan monobloc systems offer a capacity range
from 5 through to 84kW. Designed to suit a wide number of applications,
these models offer a viable solution for the varying requirements that
domestic and small commercial applications demand.

Self-contained unit, only requiring water and electric connections
No need for gas supply, flues or ventilation
Single phase power supply with a low starting current (3 phase available for 14kW)
Low maintenance and quiet operation
Operates with outside temperatures as low as -25ºC
Multiple unit connection
Hybrid function, for use with conventional boilers
2-zone energy efficient space heating control
Available as a standalone, packaged or semi packaged system
Energy monitoring as standard
Coastal protection models available (-BS)

The vast majority of UK homes
Small Retail Outlets
Dental / Doctor’s Surgeries
Public Sector / Commercial Buildings
Heating

Ecodan Monobloc Air Source Heat Pumps
PUHZ-W85VHA2
Certificate Number: MCS HP0002
Product Type: Heat Pumps
Product Reference: PUHZ-W50VHA2-(BS), PUHZ-W85VHA2-(BS)
PUHZ-W112VHA-(BS), PUHZ-HW140VHA2/YHA2-(BS)


Upper View
Front View
Upper View
Front View
PUHZ-W50VHA2(-BS) PUHZ-W85VHA2(-BS)
Upper View
Front View
Product Information
Heating

Ecodan Monobloc Air Source Heat Pumps
A++
127%
3.25
A++
162%
4.12
A
99%
4.8
1.63
2.95
-15 ~ +35°C
45
40
22
14.3
12
950
330+30*5
740
64
220-240v, 50Hz
Single
5.4 [13]
16
A++
128%
3.27
A++
162%
4.12
A
97%
8.3
2.96
2.80
-20 ~ +35°C
48
42
22
25.8
13.5
950
330+30*5
943
77
220-240v, 50Hz
Single
10.3 [23]
25
A++
126%
3.22
A++
157%
3.99
A
96%
14.0
4.81
2.91
-25 ~ +35°C
53
46
28
40.1
9
1020
330+30*5
1350
134
220-240v, 50Hz
Single
14.9 [35]
40
A++
126%
3.22
A++
157%
3.99
A
96%
14.0
4.81
2.91
-25 ~ +35°C
53
46
28
40.1
9
1020
330+30*5
1350
148
380-415v, 50Hz
3
5.1 [13]
16
HEAT PUMP SPACE
HEATER - 55˚C
HEAT PUMP SPACE
HEATER - 35˚C
HEAT PUMP COMBINATION
HEATER - Large Profile*1
HEATING*2
(A-3/W35)
OPERATING AMBIENT TEMPERATURE (°C DB)
SOUND PRESSURE LEVEL AT 1M (dBA)*3*4
LOW NOISE MODE (dBA)*3
WATER DATA
DIMENSIONS (mm)*7
WEIGHT (kg)
ELECTRICAL DATA
ErP Rating
ɳs
SCOP
ErP Rating
ɳs
SCOP
ErP Rating
ɳwh
Capacity (kW)
Power Input (kW)
COP
Pipework Size (mm)
Flow Rate (l/min)
Water Pressure Drop (kPa)
Width
Depth
Height
Electrical Supply
Phase
Nominal Running Current [MAX] (A)
Fuse Rating - MCB Sizes (A)*6
  


A++
125%
3.20
A++
164%
4.18
A
100%
11.0
3.65
3.01
-20 ~ +35°C
53
46
28
32.1
6.3
1020
330+30*5
1350
133
220-240v, 50Hz
Single
11.2 [29.5]
32

*1 Combination with EHPT20X-MHCW Cylinder
*2 Under normal heating conditions at outdoor temp: -3°CDB / -4°CWB, outlet water temp 35°C, inlet water temp 30°C.
*3 Under normal heating conditions at outdoor temp: 7°CDB / 6°CWB, outlet water temp 35°C, inlet water temp 30°C as tested to BS EN14511.
*4 Sound power level of the PUHZ-W50VHA2 is 61dBA, PUHZ-W85VHA2 is 62.5dBA, PUHZ-W112VHA is 65dBA, PUHZ-HW140VHA2 is 65.5dBA, PUHZ-HW140YHA2 is 67.5dBA. Tested to BS EN12102.
*5 Grille.
*6 MCB Sizes BS EN60898-2 & BS EN60947-2.
*7 Flow Temperature Controller (FTC) for standalone systems PAC-IF062B-E Dimensions WxDxH (mm) - 520x150x450
Printed on September 26th 2015 SAP No. 282526
UNITED KINGDOM Mitsubishi Electric Europe Living Environmental Systems Division
Travellers Lane, Hatfield, Hertfordshire, AL10 8XB, England General Enquiries Telephone: [phone] Fax: [phone]
IRELAND Mitsubishi Electric Europe Westgate Business Park, Ballymount, Dublin 24, Ireland
Telephone: Dublin [phone] Fax: Dublin [phone] International code: (003531)
Telephone: [phone]
email: [email protected] web: heating.mitsubishielectric.co.uk
Country of origin: United Kingdom – Japan – Thailand – Malaysia. ©Mitsubishi Electric Europe 2015. Mitsubishi and Mitsubishi Electric are trademarks of Mitsubishi Electric Europe B.V. The company reserves the
right to make any variation in technical specification to the equipment described, or to withdraw or replace products without prior notification or public announcement. Mitsubishi Electric is constantly developing
and improving its products. All descriptions, illustrations, drawings and specifications in this publication present only general particulars and shall not form part of any contract. All goods are supplied subject to
the Company’s General Conditions of Sale, a copy of which is available on request. Third-party product and brand names may be trademarks or registered trademarks of their respective owners.
ɳs is the seasonal space heating energy efficiency (SSHEE) ɳwh is the water heating energy efficiency
PUHZ-(H)W112-140VHA(2) / YHA2(-BS)

Design, Installation & Servicing Instructions
Ecodan
®Air Source Heat Pump
and Flow Temperature Controller 2

PAC-IF03IB-E (FTC2)

• PUHZ-W50VHA-BS
• PUHZ-W85VHA-BS
• PUHZ-W85VHA(2)-BS
• PUHZ-HW140VHA-BS / YHA-BS
• PUHZ-HW140VHA-BS(2) / YHA(2)-BS
Press Release
Domestic Heating
UNITED KINGDOM Mitsubishi Electric Europe
Living Environmental Systems Division
Travellers Lane, Hatfield, Hertfordshire, AL10 8XB, England
Press Release
Domestic Heating
UNITED KINGDOM Mitsubishi Electric Europe
Living Environmental Systems Division
Travellers Lane, Hatfield, Hertfordshire, AL10 8XB, England

FTC STA DALO E

2

2
Contents
IMPORTANT INFORMATION Page 4
x FTC1 & FTC2 differences
x Useful numbers
INTRODUCTION Page5
x Checklist for Ecodan
x Heat pump system overview
x Ecodan air source heat pump
TECHNICAL DATA Page 10
x Ecodan specification
x Flow temperature specification
INSTALLATION Page12
x Standard single zone pipework schematic
x Standard twin zone pipework schematic
x Model selection data
x Electricity supply
x Flow temperature controller location
x Ecodan system design
x Installation
x Electrical connection to Ecodan
x Electrical connection to flow temperature controller
x Wiring termination schematics
x Electrical connection
INSTALLATION: OUTDOOR UNIT Page 23
Ecodan installation manual
x Safety procedures
x Installation location
x Drainage piping work
x Water piping work
x Electrical work
x Test run
x Location requirements
INSTALLATION: FTC2 Page 29
FTC2 Installation Manual
x Safety Precautions
x FTC2
x FTC2 unit power supplied from outdoor unit
x Connecting external input
x Connecting thermistor cable
x Switch setting of FTC2
x Automatic change-over mode
x DHW-off condition
x DHW heating procedure
x Legionella prevention mode
x Heating and Heating ECO mode
x Defrost operation
x Cooling mode
x Anti-freeze mode
x Emergency mode
x Test run
x Recycling and unit disposal
SYSTEM SET-UP Page 41
System set-up procedure
x Change language
x Setting day of the week
x Heating set-up (Heating ECO)
x Hot water set-up
x Weather compensation
x Heat emitters (radiators/UFH)
x Inserting desired temperatures
x How to lock/unlock buttons
x Error codes indication
x Display
COMMISSIONING Page50
x System commissioning procedure
x Time clock operation patterns
x Domestic hot water immersion heater
SERVICE AND MAINTENANCE Page 53
x Service and maintenance
x Basic troubleshooting
PRODUCTS Page54
x Fernox Protector HP ²5C
x Fernox Protector Alphi-11
x Sentinel R600
x Fernox Boiler Buddy
ENGINEERS FORMS Page 60
x Commissioning report
x Pre-commissioning system and installation check list
x Maintenance sheet
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3

3
IMPORTANT INFORMATION
FTC1 and FTC2 Differences
The Flow Temperature Controller 2 (FTC2) has some fundamental differences to the previous Flow Temperature
Controller (FTC1).
It is important that these differences are fully understood in order to ensure correct installation. This manual covers all
the changes which affect both the installation and the functionality of the system in detail, however the major changes are
highlighted below.
x The interconnecting cable between Ecodan and FTC2 no longer carries 240V potential so does not need an earth
or switching through an isolator, this is now a two core cable not three core plus earth as on FTC1.
x S1 is no longer in use on FTC2 and only connections between S2 and S3 are necessary, FTC2 is not powered from
the outdoor unit as is the case for FTC1.
x DIP switch SW8-3 on the outdoor unit must be switched to the ON position in order for the Ecodan to recognise
that power for the interface is provided by the FTC2.
x Immersion heater control can be provided directly from the FTC2 so no additional third party timer is required if
this control method is selected. The preferences for immersion frequency can be adjusted via DIP switches SW2-4
and SW2-5 on the FTC2 main circuit board. To use FTC2 to control the immersion heater directly, an optional
relay control box is required. If it is chosen to indirectly control the immersion heater as with FTC1 using an
additional third party timer, then DIP switch SW1- 4 must be switched OFF and SW2-7 switched ON.
x When setting the hot water temperatures on the PAR-W21MAA remote controller please be aware that this is no
longer flow temperature to the cylinder as is selected on FTC1. For FTC2, cylinder target temperature is selected
so it is important to ensure that no more than 55oC is selected for hot water mode.
x TH5 cylinder sensor is now supplied with the package and should be immersed in a dry cylinder pocket mounted
one third to half way up the cylinder, it should not be surface mounted in order to ensure accurate readings.
x TH5 sensor should not be installed on pipework or undesirable operation will be encountered, this will be
especially true when automatic changeover mode is in operation.
x The Honeywell wiring centre is no longer used with FTC2, all components are now wired directly to the relay
board.
x Please ensure that after commissioning the PAR-W21MAA remote controller it is locked, this is essential as it is
possible to turn the system on via the PAR-W21MAA when there is no demand for hot water or central heating
through the programmer, in this case the system can run without any pumps or valves energised which will result
in a high pressure fault.
x Only use spring return type zone valves with FTC2 units, this unit is not directly compatible with motor closed
valves.
Useful Numbers
After Sales Technical Support: 0870 3000 300
Hatfield Head Office: 01707 276100 (Heating Department 01707 278666)
Manchester Office: 0161 866 6080
Birmingham Office: 0121 741 2800
Bristol Office: 01454 202050
Wakefield Office: 0870 330 0347
Orpington Office: 01689 881030
Livingston Office: 01506 444960
North London Office: 01707 282480
For pre sales technical support please call your local office
4

4
INTRODUCTION
Any water distribution and central heating installation must comply with the relevant recommendation of the
current version of the Regulations and British Standards listed below:-
Building Regulations
I.E.E. Requirements for Electrical Installations (BS7671)
Water Regulations
Manual Handling Operations Regulations
British Standards BS6798, BS5449, BS5546, BS5440:1, BS5440:2, CP331:3, BS6700, BS7593 and BS7671.
Health and Safety Document No 635
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must not be taken as overriding statutory obligations.
When installing unvented hot water systems, section G3 of the building regulations should be
adhered to. An annual inspection would also 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 specification of the equipment must however remain that of the installer and any designers or
consultants concerned with the design and installation.
Please note: Mitsubishi Electric do not therefore accept any responsibility for matters of design, selection or
specification or for the effectiveness of an installation containing one of our products unless we have been
specifically requested to do so.
All goods are sold subject to our Conditions of Sale.
Important Note - Included in the AEI introduction pack is the Mitsubishi Electric homeowners 3 year guarantee
registration card. Please use this card to register within 30 days of commissioning or occupation (if new build),
DQG HQVXUH WKH KRPHRZQHU EHQHILWV IURP 0LWVXELVKL (OHFWULF·V  \HDU JXDUDQWHH IRU WKH (FRGDQ DLU VRXUFH KHDW
pump. This needs to be completed by both the Accredited Ecodan Installer and the current homeowner (or
signature of developer if new build). The registration card is free post and is logged by our warranty department.
In the unlikely event of failure of the Ecodan air source heat pump, return of the card ensures that the
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Heating department on 01707 278666.
PLEASE NOTE - If you do not complete and return the registration card the product will only be
under warranty for 12 months.
Fig. 1.1
5

5
Checklist for Ecodan
This checklist has been created to help you understand the differences from other types of heating systems you
may have installed. We suggest you use this checklist as a helpful summary of the main differences over
conventional heating systems, but you will also need to understand and comply with all of the technical details
contained within this document to ensure a successful installation. For further assistance please contact Mitsubishi
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Primary System Circuit
x It is very important that the primary system is cleansed using a suitable cleansing agent such as Fernox F3
or Sentinel X300; to ensure that any flux residues / installation debris is removed.
x The Ecodan and external connecting pipework require protection against freezing. For this reason a
combined anti-freeze and inhibitor product such as Fernox HP-5c or Alphi-11(see pages 54 & 55) or
Sentinel R600 (see page 56) must be used in the correct quantity.
x All primary pipework on flow and return between the Ecodan unit and cylinder should be insulated with
Armaflex or similar. Weather protection should be added to all outdoor pipework. Flexible connection
pipes (supplied) MUST be fitted between the outdoor unit and primary rigid pipework on both the flow
and the return.
x The Fernox Boiler Buddy should be fitted internally on the return pipe (from the Ecodan) to help protect
the heat pump from any heating system contamination and provide an ongoing visual indication of the
system water condition.
Interconnection Between Ecodan and Flow Temperature Controller 2 (FTC2)
x A 2 core signal cable is needed between the internal FTC2 and the external Ecodan unit . This cable should
be of 1 to 1.5mm² and is NOT supplied with the package.
Radiator System Circuit
x As the Ecodan generates lower temperatures than a conventional boiler the radiators should have been
designed to suit the lower mean temperature. These need to be calculated using the design tool supplied
on the AEI training course or using other appropriate methods.
Retrofit Situations
x The heat exchanger in the Ecodan should be protected from particulate contaminates in the water circuit.
When fitting in a retrofit situation the existing radiator circuit MUST be chemically cleaned and thoroughly
flushed before installation.
Flow Setter
Valve
Boiler Buddy
and TF1
Ecodan Air Source
Heat Pump
(see page 10 for
pictures of each model)
Flexible Pipes (x2)
Supplied Parts
Flow Temperature
Controller 2
INTRODUCTION
Fig. 1.2
6

6
Heat Pump System Overview
The Ecodan air source heat pump extracts thermal energy from the outside air and transfers this into a property
in the form of hot water as a conventional heating system does.
Due to the outputs available, domestic hot water always takes priority over space heating. The Flow Temperature
Controller 2 (FTC2) targets a preset cylinder target temperature on the TH5 sensor within the cylinder pocket
and communicates with the Ecodan until this temperature is achieved.
A high flow temperature is required in hot water heating to raise the domestic hot water store then the
temperature is reduced in space heating to increase the efficiency. See page 50 for recommended settings and
commissioning procedure.
Mounted in the rear of the Ecodan is an outside temperature compensation sensor. This will modulate the flow
temperature in space heating mode (according to the ambient temperature) to increase the efficiencies of the
system. Due to the lower flow temperatures provided by the Ecodan air source heat pump, radiators need to be
sized in accordance with this, compared to that of conventional boiler systems. In retrofit situations where old
panel type radiators are fitted it may be possible to keep the same physical size of radiator and simply upgrade to
more efficient double panel/double convector type radiators.
Two heating zones can be connected to the Ecodan system in the same way as a conventional heating system.
When the system is installed and commissioned the control equipment will automatically switch between hot
water and heating modes as and when required.
Each of the Ecodan models require sufficient primary flow rate for adequate operation. Due to the large
resistances caused by the plate heat exchanger in the Ecodan, two domestic circulating pumps in series to
produce the required flow rates. These pumps must be set to the same speed or damage to the system may
occur. Pipe diameters will need to increase on the PUHZ-HW140VHA(2) / YHA(2) models to assist in reducing
the resistance, required flow rates are listed on table 1.1 (page 10).
A flow setter valve is supplied with each system to give an indication of the actual flow rate achieved. It should be
installed on the common flow or return pipe work to the Ecodan. Details of this can be found on page 15 of this
manual.
Automatic air vents must be installed at the highest point of the primary system. The slightest amount of air in the
system can reduce efficiencies and even cause the Ecodan to fault.
The primary loop must contain an antifreeze concentration (in accordance with the manufacturers recommended
quantities) to avoid possible freezing during periods when the appliance is not being operated. It is recommended
that a dual inhibitor anti-freeze is used. For information on the Fernox Protectors HP-5c and Alphi-11 see pages
54 and 55 or Sentinel R600 on page 56.
To comply with this requirement the hardness of the mains water should be checked by the installer and if
necessary the optional factory fitted in-line scale inhibitor should be specified at the time of order for hardness.
To optimise running costs it is advisable the homeowners seeks the cheapest possible electricity tariff and that
weather compensation is set up correctly on commissioning. An internet search facility like www.uswitch.com will
be able to help with electricity tariffs.
INTRODUCTION
7

7
How a heat pump works
The heat pump essentially works the same way as your refrigerator but in reverse.
The Ecodan is hermetically sealed (no refrigeration piping involved) with R410A
refrigerant. The cycle it completes to produce heat is known as the vapour-
compression refrigeration cycle:
The first phase begins with the refrigerant being cold and at low pressure.
The refrigerant within the circuit is compressed as it passes through the
compressor. It becomes a hot highly pressurised gas. The temperature also
rises typically to 60°C.
The refrigerant is then condensed as it passes across a plate heat
exchanger. Having a cooler side to the heat exchanger it decreases the
temperature, so it changes the property of the refrigerant from a gas to a
liquid.
The refrigerant as a cold liquid still has a high pressure. For expansion to
occur it passes through an expansion valve.The pressure drops but it is still
a cold liquid.
The final stage of the cycle is when the refrigerant passes into the evaporator
and evaporates. It is at this point when some of the free heat energy in the
outside air is absorbed by the refrigerant.
It is only the refrigerant that is being passed through this cycle; the water is heated
up by the plate heat exchanger. The cooler water extracts energy from the hotter
refrigerant, i.e. the water is heated as it passes across the plate heat exchanger.
This water flows towards the heating system and hot water storage tank, where
its energy is used to provide domestic hot water and space heating.
Step 1Step 2
Step 3Step 4
Boiling points:
The refrigerant used within the
cycle has a different boiling point
to water, which boils (turns from
liquid to gas) at 100°C. This is
only true at atmospheric pressure.
When the pressure increases so
does the boiling temperature;
decrease the pressure and boiling
temperature drops. Liquid turns
to gas at a lower temperature.
The boiling point changes when
the pressure changes. Refrigerants
have different properties to water
and have much lower boiling
temperatures. During the fourth
stage of the cycle the outside
ambient temperature is much
hotter than the temperature of
the refrigerant and will heat it.
Compressor
Heat Exchanger
Evaporator
Expansion Valve
1 compressed
2condensed
3expansion
4evaporates
Outside Air
Sealed Ecodan Unit
Hot water for heating
and hot water
Fig. 1.3
INTRODUCTION
8

8
Ecodan Air Source Heat Pump
x Must be mounted external to the property in a suitable location with a minimum distance of 300mm from
the nearest wall at the rear of the unit. For minimum distances on any side of the Ecodan refer to page 23.
The unit should never be enclosed.
x Cold air is blown from the front of the unit - it should be positioned in a location where this will not cause
a nuisance. The air needs to circulate freely around the unit, the efficiency of the Ecodan will be hampered
if warmer air cannot enter the rear of the unit.
x It should be mounted on anti-vibration mounts, these are NOT provided with the equipment.
x The anti-vibration flexible hoses should be fitted to the flow /return pipe-work.
x Condensate water may be produced which will drain away from the unit. It is suggested that a gravel filled
channel as a soak away, or a similar arrangement to suit the location is installed to overcome this.
x An optional drainage kit may be purchased should condensate need to be disposed of in a main drain as
opposed to a soak away type arrangement.
x The internal and external flow and return pipework must be insulated and waterproofed externally to
prevent freezing.
x All pipework should be insulated, any heat losses here will result in lower coefficient of performance
(COP).
x An external temperature sensor is positioned at the rear of the Ecodan. Care should be taken to ensure
this is not placed in direct sunlight.
INTRODUCTION
9

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PUHZ-W50VHA-BS PUHZ-W85VHA(2)-BS PUHZ-HW140VHA(2)-BS
/PUHZ-HW140YHA(2)-BS
Model
Dimensions (mm) Width 950 950 1020
Depth 330+30*330+30*330+30*
Height 7409431350
Weight (kg) 64 77 134 / 148
Airflow (m3/min) 50 55 100
Nominal sound level (dBA) ¹ ¹ ¹
Low noise mode (dBA) @ 7°C 40 42 46
Guaranteed operating range (Outdoor) - 15 ~ +35°C - 20 ~ +35°C - 25 ~ +35°C
Electrical supply 220-240v, 50Hz 220-240v, 50Hz 220-240v, 50Hz /
380-415v, 50Hz
Phase Single Single Single / 3 Phase
Running current (A) [Max] 5.4 [13] 10.3 [23] 14.9 [35] / 5.1 [13]
Starting current (A) 5 5 5
Fuse Rating
(MCB sizes BS EN 60947-2) (A)
162540/16
Heating A2/W35 Capacity (kW) 5.0 8.5 14
(Eco label) COP 3.132.95(3.17) 2.69(3.11)
(Eco label) Power Input (kW) 1.6 2.88 (2.68) 5.21(4.52)
Nominal Flow Rate (L/min) 14.3 25.8 40.1
Heating A7/W35 Capacity (kW) 5.0 9.0 14.0
(Eco label) COP 4.13.85(4.18) 4.19(4.25)
(Eco label) Power Input (kW) 1.22 2.34 (2.15) 3.34(3.31)
Nominal Flow Rate (L/min) 14.3 25.8 40.1
Primary Flow Rate Maximum (L/min) 14.3 25.8 40.1
Minimum(L/min)6.51017.9
* Grille
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Eco label models denoted by (2) after product code
5kW Unit
8.5kW Unit
14kW Unit
Table 1.1
For cylinder requirements see table 1.2 (page 15).
TECHNICAL DATA
Fig. 1.4 Fig. 1.5 Fig. 1.6
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TECHNICAL DATA
For full installation instructions on installing FTC2 refer to
pages 29-40.
The FTC2 unit should be supplied with the following parts
1. FTC2 unit x 1
2. Thermistor x 2 (TH1 Red Cable & TH5 Black Cable)
3. Remote controller cable (5m) x 1
4. Remote controller x 1
A
B
Fig. 1.7
Fig. 1.8
Fig. 1.9
A. FTC2casescrews
B. FTC2case
C. FTC2mountingholes
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INSTALLATION
Pipe Work Schematic Single Zone
Fig. 2.0
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INSTALLATION
Pipe Work Schematic Twin Zone
Fig. 2.1
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Model Selection Data
General
When checking the suitability of the Ecodan it is recommended that heat loss calculations are completed for the
external building fabric plus the ventilation losses, as set out in BS5449:1990. The output of the Ecodan should
then be chosen to meet this demand. Under-sizing of the unit will not provide adequate heat through the coldest
days, while over-sizing will cause the Ecodan to cycle and work inefficiently.
The Ecodan unit has been designed to be incorporated into a conventional heating system, either a vented or
unvented domestic hot water store is required to supply water for showers, sinks etc.
When the Ecodan system is being used to supply domestic hot water, a hot water storage appliance will be
required. The cylinder capacity required needs to be calculated in the correct way set out in BS 6700 / NHBC for
storage cylinders. The cylinder requirements are listed on pages 16 and 21.
Electricity Supply
A mains supply rated to suit the capacity of the Ecodan is required, this must have a means of isolation within one
metre of the appliance itself. The circuit and heat pump should be protected by a 30mA rated RCD. This
appliance MUST BE EARTHED.
All external wiring to the appliance must be in accordance with the latest I.E.E. wiring regulations and any local
regulations which may apply.
The appliance shall be supplied from a suitably rated double pole isolator with a contact separation of at least
3mm in both poles.
In the event of an electrical fault after installation of the appliance, electrical checks must be carried out i.e. Earth
Continuity, Short Circuit, Polarity and Resistance to Earth. The Ecodan MUST BE DISCONNECTED
BEFORE these tests are carried out.
Interconnecting cable for FTC2 no longer carries 240V potential so does not need earth or switching through an
isolator.
Care should be taken not to run communication cables (flow sensor, remote controller cable) close to or with
mains 240 volt cables in order to reduce interference.
Control equipment (pumps, zone valves, thermostats etc) must have a separate circuit from the Ecodan system
and should be protected by the required fuse rating.
Flow Temperature Controller Location
The flow temperature controller should be mounted in a dry area using the mounting holes pre-fabricated in the
steel casing. It is usually installed in an airing cupboard or in a loft space close to the control equipment. The TH5
sensor will need to record a cylinder temperature so should not be further than five metres from the flow
temperature controller. For full installation instructions on installing FTC2 refer to pages 29-40.
INSTALLATION
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Ecodan System Design
Fernox Boiler Buddy and TF1
AFernox Boiler Buddy is provided with the package, this must be fitted internally on the return circuit as close
to the Ecodan as possible. It should be installed fully in accordance with the manufacturers instructions on pages
57 - 59.
Flow Setter Valve
A flow setter valve is provided with the package to give an indication of the water flow rate through the primary
pipework. Each model of Ecodan has a minimum and a maximum flow rate shown in table 1.2 on the following
page, which must be achieved for the system to operate correctly.
The valve can be installed in either the flow or return pipework to the Ecodan. A flow rate indication can then be
taken from the bottom of the float.
Anti-Vibration Equipment
Flexible hoses are supplied with the Ecodan package and should be installed to connect the Ecodan to the system
pipework, do not over tighten joints and always use the washers provided. Anti-vibration mountings (i.e. Tico-
pad) should be installed under the mountings of the heat pump to prevent excessive vibration.
Automatic Bypass Valve
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circuit as the pumps are operated by auxiliary contacts in the 2 ²port zone valves and there is no pump overrun
function. It should be positioned between the flow and return of the site installed primary pipe work when
required.
Any automatic bypass valve fitted should be setup correctly at commissioning stage to suit the heating system.
Failure to do this correctly can have a detrimental effect on the efficiencies of the heat pump system.
INSTALLATION
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Installation
Ecodan Primary Circuit
The Ecodan primary circuit must be unvented due to the concentration of anti-freeze required in the pipework.
Flexible hoses are supplied with the package which should be installed to connect the Ecodan to the system
pipework to prevent resonance into the fabric of a property. The flow pipe from the Ecodan should be connected
to the top connection of the external plate heat exchanger. All primary pipework from the Ecodan to the cylinder
should be fully installed using Armaflex or similar. All joints should be taped and either weather-wrapped or put
into trunking.
Central Heating Circuits
These should be sized in the normal way to suit the flow and return temperatures for the required system.
Balancing of a radiator circuit is essential to achieve the best performance from an Ecodan.
If the Ecodan is being fitted to an existing heating system, this must be thoroughly flushed/cleaned before the
appliance is installed.
Plastic Pipework
Plastic pipework can be used internally as long as it is recommended by the manufacturer and installed in
accordance with their recommendations. Barrier type plastic pipework should always be used for these systems. It
is important to ensure that if the system is installed using plastic pipework, it is designed and sized using the
characteristics for plastic pipework.
Cylinder Specification
As a rule of thumb for the average household application the following combinations can be used, however please
note these are for guidance only and must be checked by the designer and installer beforehand.
To achieve good system efficiencies higher flow rates are recommended. Using a larger cylinder than
recommended will not cause the system to malfunction but will affect the efficiency of the system. A small heat
pump having to heat up a large cylinder will take longer than necessary and will effect the homeowners running
costs.
Due to the low flow temperatures supplied by the Ecodan the type of domestic hot water cylinder used in
conjunction should meet a certain criteria to achieve the best possible performance and efficiencies.
PUHZ-W50VHA-BS PUHZ-W85VHA(2)-BS PUHZ-HW140VHA(2)-BSEcodan Unit
System
Requirements
Circulating Pumps* 2 x 15/50 2 x 15/50 2 x 15/60
Minimum Flow Rate 6.5 l/m 10 l/m 17.9 l/m
Maximum Flow Rate 14.3 l/m 25.8 l/m 40 l/m
Pipework 22mm22mm28mm
Cylinder
Requirements
Minimum coil surface area 2m² 3m² 3m²
Material CopperCopperCopper
Capacity** Up to 180 L Up to 210 L Up to 300 L
INSTALLATION
Table 1.2
*Pump sizes will vary with application, these are general guideline sizes only.
**General guideline sizes giving acceptable heat up times with the respective unit and providing
the property with adequate hot water storage.
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Electrical Connection to Ecodan
INSTALLATION
Fig. 2.2
Electrical Work
All electrical work should be completed as recommended in the relevant Ecodan installation guide supplied with
the heat pump.
Notes:
1. Wiring size must comply with the applicable local and national codes.
2. Power supply cables and the cables between Interface unit/Flow Temperature Controller and outdoor
unit shall not be lighter than polychloroprene sheathed flexible cables. (Design 60245 IEC 57)
3. Be sure to connect the cables between Interface unit/Flow Temperature Controller and outdoor unit
directly to the units (no intermediate connections are allowed). Intermediate connections may result in
communication errors. If water enters at the intermediate connection point, it may cause insufficient
insulation to ground or a poor electrical contact . (If an intermediate connection is necessary, be sure to
take measures to prevent water from entering the cables.)
4. Install an earth longer than other cables.
The installer must ensure that before the Ecodan outdoor
unit is switched on that DIP switch SW8-3 is set to the on
position. This allows the Ecodan to recognise that power
for the interface is provided via the FTC2.
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INSTALLATION
WIRING DIAGRAMS
Note 1 - Optional relay box 1 is for use with 1 x 3kW immersion heater
Note 2 - Optional relay box 2 is for use with 1 x 3kW immersion heater or 1 x 3kW boost heater
Note 3 - Interconnecting cable number of cores will vary dependant on which appliances are specified
Fig. 2.3
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INSTALLATION
WIRING DIAGRAMS
Note 1 - Optional relay box 1 is for use with 1 x 3kW immersion heater
Note 2 - Optional relay box 2 is for use with 1 x 3kW immersion heater or 1 x 3kW boost heater
Note 3 - Interconnecting cable number of cores will vary dependant on which appliances are specified
Fig. 2.3
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