Grant Aerona3 HPID12R32 User guide
UK | DOC 0154 | Rev 1.0 | May 2019
Grant Aerona³ HPID12R32
Installation and Servicing Instructions
GRANT ENGINEERING (UK) LIMITED
Hopton House, Hopton Industrial Estate, Devizes, Wiltshire, SN10
2EU
Tel: +44 (0)1380 736920 Fax: +44 (0)1380 736991
This manual is accurate at the date of printing but will be superseded and should be disregarded if specications and/or appearances
are changed in the interests of continued product improvement. However, no responsibility of any kind for any injury, death, loss,
damage or delay however caused resulting from the use of this manual can be accepted by Grant Engineering (UK) Limited, the
author or others involved in its publication.
All good sold are subject to our ocial Conditions of Sale, a copy of which may be obtained on application.
© Grant Engineering (UK) Limited 2017. No part of this manual may be reproduced by any means without prior written consent.
These instructions are intended to guide installers on the
installation, commissioning and servicing of the Grant Aerona³
HPID12R32 heat pump. After installing the heat pump, leave
these instructions with the user.
A user handbook is available to guide users in the operation of the
heat pump.
The following special text formats are used in these instructions
for the purposes listed below:
! WARNING !
! CAUTION !
! NOTE !
These instructions cover the following product codes:
HPID12R32
Output at 7°C air and 35°C ow temperature
The heat pump should be serviced at least every twelve months and
the details entered in the service Log in the user handbook.
Power Quality Information
HPID12R32 Complies with BS EN/IEC 61000-3-11
& BS EN/IEC 61000-3-12
1.1 General 4
1.2 Main Components 4
1.3 Planning Permission 4
1.4 DNO Application 4
1.5 Important Advice 4
1.6 Product Contents 4
1.7 Installation Accessories 4
1.8 Control Parameters 4
1.9 Heat Pump Components 5
2.1 Heat Pump Technical Data 6
2.2 Main Supply Cable 7
2.3 Base Tray Heater 7
2.4 Heat Pump Dimensions 7
2.5 Remote Controller Dimensions 8
3.1 Introduction 9
3.2 Heating System Design Criteria 9
3.3 Regulations 10
3.4 Heat Pump Location 10
3.5 Preparation for Installation 10
3.6 Installing the Heat Pump 11
3.7 Metering for Domestic RHI Installations 11
3.8 Volumiser Tanks 12
3.9 Hot Water Cylinders 12
3.10 Hydraulic Diagram 13
3.11 Before you Commission 14
3.12 Completion 15
3.13 Installation Checklist 15
4.1 Sealed System Requirements 16
4.2 Filling the Sealed System 17
4.3 Pressure Relief (Safety) Valve Operation 17
5.1 Temperature Control 18
5.2 Heat Pump Cylinders 18
5.3 Legionella 19
5.4 Automatic DHW Boost Kit 19
6.1 Wiring Centre 22
6.2 Terminal PCB Input/Output 23
6.3 Power Supply 23
6.4 Tightening Torques 25
6.5 Solar Thermal 25
6.6 Connection of Heating System Controls 25
6.7 Connection of Remote Controller 25
6.8 Grant Interface Relay Box 25
6.9 Wiring Diagrams 25
6.10 System Control Wiring Diagrams 26
7.1 Remote Controller 30
7.2 Installation Requirements 30
7.3 Installing the Remote Controller 30
7.4 Connecting the Remote Controller 31
to the Heat Pump
7.5 Buttons 32
7.6 Display Panel 33
8.1 Heat Pump Operation 34
8.2 Weather Compensation 36
8.3 Water Pump Management 37
8.4 Frost Protection 40
8.5 ON/OFF DHW Production Remote Contact 42
8.6 ON/OFF Heating Remote Contact 43
8.7 Night Mode 44
8.8 Low Tari 45
9.1 System Setup 46
9.2 Setting the Day and Time 46
9.3 Access for Parameter Settings 47
9.4 Accessing the Parameter Setting Menu 47
(User level)
9.5 Accessing the Parameter Setting Menu 47
(Installer level)
9.6 Temperature Control - DHW function 47
9.7 Parameters Input/Output 48
9.8 Remote Controller Back Light Display 48
Parameters
9.9 Weather Compensation 49
9.10 Frost Protection Function Setting 49
9.11 Pump Operation and Air Bleeding 49
from Heating System
9.12 Pump Output Setting 49
9.13 Coastal Installations 49
10.1 General 50
10.2 Air Inlet and Outlet 50
10.3 Condensate Disposal 50
10.4 Heating System Connections 50
10.5 Heat Pump Controls 50
10.6 Refrigerant 50
10.7 Monitor Display Function 51
11.1 Error Code Display 52
11.2 Error History Display 52
11.3 Reset Error Code Display 52
11.4 Error Codes 53
11.5 Table of Controller PCB and Terminal 56
PCB Alarms
11.6 Error Codes and PCB Alarm Figures 57
and Tables
12.1 Exploded Diagram - HPID12R32 60
12.2 Spare Parts List - HPID12R32 61
14.1 General 63
14.2 Refrigerant (R32) 63
The Grant Aerona³ range consists of four compact, lightweight,
MCS approved, monobloc, air-to-water, inverter driven, single-
phase air source heat pump working with R32 refrigerant.
It is important that these installation and servicing instructions are
followed to ensure correct installation and operation. Failure to do
so may result in poor performance.
It is not within the scope of this manual to design the heating
system or provide any advice regarding the layout of the system or
any of the controls required for any individual heating system.
These instructions do not replace the installation or users manuals
for any additional components used in the design of your system
e.g. cylinders, motorised valves, programmers, solar thermal
devices, buers, etc.
Each model incorporates the following main components:
• DC inverter - this responds rapidly to changing conditions
to provide the necessary output to meet heating demands
by varying the speed and output of the compressor, fan
and circulating pump. This reduces the on/o times of the
compressor, keeping the water temperature constant during
operation reducing the electricity consumption.
• - a high-eciency DC twin-rotary compressor to
provide smooth performance and quiet operation.
• - the high-eciency plate
heat exchanger is used to transfer heat to the heating system
primary circuit.
• - a high-eciency DC fan motor is used for smooth and
quiet operation. Two fans (3 blade) are tted to the HPID12R32
units.
• - high-eciency DC pump speed controlled
from the ASHP control PCB.
• - factory tted electric heater prevents
condensate in the base of the heat pump from freezing. When
the ambient temperature reaches 2.5°C, the base tray heater
turns on and at 5.5°C turns o (ΔT of 3k). This cannot be
adjusted or turned o. Refer to Section 2.3.
• - a 3 bar pressure relief valve is factory
tted.
• - factory tted to assist
in the removal of air from the heating primary circuit of the heat
pump.
The installation of a Grant Aerona³ heat pump on domestic
premises may be considered to be permitted development, not
needing an application for planning permission, provided ALL the
limits and conditions listed on the Planning Portal website are met.
For further information, visit www.planningportal.gov.uk.
An application must be made to the Distribution Network Operator
(DNO) before connecting the heat pump(s) to the mains electrical
supply. There are six DNOs operating the electrical distribution
network throughout England, Scotland and Wales and the
application must be made to the DNO covering the area concerned.
The necessary information required to make this application
(J-forms) can be downloaded from the Grant UK website (www.
grantuk.com), completed and then submitted to the correct DNO for
1
the area in question.
1. It is essential that the full layout of the system is understood
before the installation of any component is undertaken. If you
are in any doubt, please stop and seek advice from a qualied
heating engineer or from Grant UK. Please note that Grant
UK will not be able to oer specic advice about your system
unless we designed it. In this case, we will always refer you to
seek the advice of a qualied system designer.
2. The heat pump must be installed and commissioned in
accordance with these installation and servicing instructions.
Deviations of any kind will invalidate the guarantee and
may cause an unsafe situation to occur. Please seek advice
from Grant UK if any of these user, installation and servicing
instructions cannot be followed for whatever reason.
3. The heat pump contains high pressures and high temperatures
during normal working conditions. Care must be taken when
accessing the internal workings of the heat pump.
4. The heat pump contains an electrically driven fan which rotates
at high speed. Disconnect the heat pump from the electrical
supply before removing the top cover.
The Aerona³ comes supplied on a single pallet. The following items
are included:
Aerona³ heat pump 12kW 1
Condensate drain elbow 1
1ʺ BSP x 22 mm exible
hose c/w washer 2
1ʺ nipple 2
1ʺ x 1¼ʺ reducing socket 2
22 mm isolating valve
28 mm isolating valve 2
Remote controller 1
Remote controller cable
(length: 8 metres) 1
Grant EP002 interface
relay box 1
Installation and servicing
instructions 1
User instructions 1
The following are available from Grant UK:
HPIDFOOT/KIT2 Anti-vibration mounts (2 x 600mm and xing kit)
HPIDINSU/KIT Through wall insulation kit (22 - 28mm exible hoses)
All parameters are listed sequentially in Appendix A.
Main components - HPID12R32
PCB (Main)
PCB (Terminal)
Terminal block
Airpurge valve
Pump
Compressor
Pressure relief valve
High pressure switch
Air inlet is located in the left or in the back
Air outlet
HPID12R32
Wiring lid
Screw
Technical data
Unit
Heating capacity (BS EN 14511 - air: 7°C / water: 35°C) kW 13.6
COP (BS EN 14511 - air: 7°C / water: 35°C) 5.25
SCOP (average climate conditions) - 35°C 5.93
Heating capacity (BS EN 14511 - air: 7°C / water: 55°C) kW 11.4
COP (BS EN 14511 - air: 7°C / water: 55°C) 3.23
SCOP - average climate conditions (BS EN 14825 - water: 55°C) 3.97
Power supply ~230V 1ph
50Hz
Power input (BS EN 14511 - air: 7°C / water: 35°C) kW 2.59
Power input (BS EN 14511 - air: 7°C / water: 55°C) kW 3.53
Mechanical protection IPX4
Compressor
DC twin rota-
ry - inverter
driven
Pressure (maximum) MPa 4.1
Refrigerant R32
Mass of R32 kg 2.20
Circulating pump m head 15
Rated air ow (BS EN 14511 - air: 7°C / water: 35°) m³/h 4,464
Rated air ow (BS EN 14511 - air: 7°C / water: 55°) m³/h 4,664
Power input of fan (BS EN 14511 - air: 7°C / water: 35°) kW -
Power input of fan (BS EN 14511 - air: 7°C / water: 55°) kW -
Power input of circulating pump (BS EN 14511 - air: 7°C / water: 35°) kW -
Power input of circulating pump (BS EN 14511 - air: 7°C / water: 55°) kW -
Flow rate (minimum) litres/min 15
Rated ow rate (BS EN 14511 - air: 7°C / water: 35°) litres/min 40.68
Rated ow rate (BS EN 14511 - air: 7°C / water: 55°) litres/min 40.62
Outdoor temperature °C -20 to 43
Maximum inlet water temperature (not operating) °C 70
Water pressure (system) MPa (bar) 0.1 to 0.3 (1
to 3 bar)
Sound power level at 1 metre (external) dB(A) 60.8
Sound pressure level at 1 metre (external) (Q=1) dB(A) 49.8
Water connections BSPF 1¼˝
Weight (empty) kg 99
Weight (full) kg 101
Water content litres 2.0
Heat pump casing volume m³ 0.468
ErP rating (low temperature: 35°C ow) - heating
A++ (A+++
from
September
2019)
ErP rating (low temperature: 55°C ow) - heating
HPID12R32
will be
A+++ from
September
2019
2
The cable supplying power from the consumer unit to the heat
pump must be connected via an external 2 pole isolator. This allows
the service engineer to isolate the power supply before working on
the heat pump safely.
Refer to Section 6 for connection details.
Electrical installation requirements
(A)
Rating (A)
HPID12R32 23.0 32 C
The factory tted electric heater prevents condensate in the base
of the heat pump from freezing. When the ambient temperature
reaches 2.5°C, the base tray heater turns on and at 5.5°C turns o
(ΔT of 3k). This cannot be adjusted or turned o.
V 230V
P185W
t110°C
A 0.8A
R290 Ω
327
57
388 54
R3/4(20A)
30037.4 42
825 73
675
580
122.5 122.5
43
Circulating water
return port
Circulating water
outgoing port
HPID6R32
882
850 24
R1(25A)
R1(25A)
37 330 38
480173
155540155
75 70
357
Circulating water
return port
Circulating water
outgoing port
HPID10R32
680185
357
80 80
241000 3637 330
1418
205590205
Circulating water
outgoing port
Circulating water
return port
R1 1/4(32A)
R1 1/4(32A)
HPID13R32 and HPID17R32
HPID12R32 heat pump dimensions
12
37 37
23 23
18.25
120 16.5
6-4.2×7
120
83.5 18.25
(116)
Knock out hole
Mounting plate Door closed Door open
Remote controller dimensions
Before continuing with the installation of the Aerona³ heat pump,
please spend a few minutes conrming the suitability of the heat
pump to your system. Failure to do so may result in poor perfor-
mance and wasted time:
• Has a room-by-room heat loss calculation been carried out?
• Is this system designed for mono or bivalent?
• If monovalent, total heating capacity?
• If bivalent, what is the load capacity of the heat pump?
• If bivalent, what is/are additional heat source(s)?
• Type of system design? - S-plan, S-plan plus
• Will a buer be used?
• If yes, what is the capacity of the buer?
• Has cavity wall insulation been installed?
• Has loft insulation of 270mm been installed?
• Have all system pipes been lagged correctly?
• Are the existing controls being upgraded?
A typical condensing oil or gas red boiler operates with a ow of
70°C and a return of 50°C, i.e. with a DT of 20°C. A heat pump
operates with a ow of between 30°C and 55°C with a DT of 8°C.
The design of any system in the UK is typically based on the
following parameters:
1. That the outside design air temperature can fall to -3°C or
lower
2. The internal design temperature can be between 18-22°C
depending on the room concerned.
3. The heat pump operates at lower water temperatures than an
oil or gas red appliance.
Designing a new system for use with a heat pump is straight
forward, assuming the insulation properties of the dwelling
meets or exceeds current Building Regulations and the lower
ow/return temperatures are taken into account in the selection
of the type and size of the heat emitters used.
While underoor heating is the preferred heat emitter, a
combination of underoor heating and radiators, or radiators only,
works just as eciently. It is necessary, however, to calculate the
size of radiator required accurately – if this is not done, the house
will fail to reach the target temperature and will be costly to rectify
after the installation is complete.
When tested to BS EN 14511, the heat output for an heat pump is
declared at the test conditions of 7°C outside air temperature and
35°C or 55°C water ow temperature.
At all other values of outside air temperature and water ow
temperature the actual heat pump output will vary, e.g. the heat
output will:
• decrease with lower outside air temperatures and increase
with higher outside air temperatures at any given water ow
temperature, and
• decrease with higher water ow temperatures and increase
with lower water ow temperatures at any given outside air
temperature
A back-up boiler can be added to the rated output of the heat pump.
Provided that the heat pump is sized correctly for the system, this
back-up heater will only compensate for any short fall in meeting
the heat load for the property below the minimum design air
temperatures.
For guidance on sizing heat emitters, e.g. radiators and/or
underoor heating, refer to MCS Heat Emitter Guide (MCS 021).
3
! NOTE !
For the heat pump to operate satisfactorily, install it as outlined in
this installation manual.
• The Grant Aerona³ heat pump should only be installed by a
competent person.
• Before installing the heat pump, please read the following
installation information carefully and install the heat pump as
instructed.
• Be sure to follow the safety notices given.
• After completing the installation, check the product operates
correctly. Then, explain to the user about the operation and
maintenance requirements as shown in this manual.
• Be sure to install the heat pump in a suitable location that can
support the heat pump when lled. Installation in an unsuitable
location may cause injury to persons and damage to the heat
pump.
• Do not install in a position where there is any possibility of
ammable gas leakage such as from LPG cylinder around the
heat pump. Leaked ammable gas around the heat pump may
cause a re.
• If the leaked refrigerant is exposed to re, poisonous gas may
be produced.
• Connect the heat pump with the exible hoses and valves
supplied, as described in this installation manual.
• Do not use an extension cable.
• Do not turn on the power until all installation work is complete.
• Only use correct Grant UK parts and accessories to avoid
accidents such as electric shock, re and leakage of water.
• Never touch electrical components immediately after the power
supply has been turned o as electrical shock may occur. After
turning o the power, always wait ve or more minutes before
touching electrical components.
• Be sure to connect the power supply cable correctly to the
terminal block as overheating can cause a re.
• Ensure the wiring lid is tted following installation to avoid
electric shock at the terminal block.
• Always connect the earth wire to the heat pump.
• Install a correctly rated circuit breaker.
• After installation, the heat pump and heating system must
be commissioned. Hand over all documentation to the end-
user and explain the operating functions and maintenance
according to these instructions.
Installation of a Grant Aerona³ heat pump must be in accordance
with the following recommendations:
• National Building Regulations, e.g. Approved Document G
• Local Bylaws (Check with the Local Authority for the area)
• Water Supply (Water Fittings) Regulations 1999
• MCS Installers Standards (if applying for the Renewable Heat
Incentive)
• MIS 3005 (Requirements for contractors undertaking the
supply, design, installation, set to work commisioning and
handover of microgeneration heat pump systems)
• MCS 020 (MCS Planning Standards)
• MCS 021 (MCS Heat Emitter Guide for Domestic Heat
Pumps)
The installation should also be in accordance with the latest edition
of the following standards and codes of Practice:
• BS 7671 and Amendments
• BS EN 12831
• Consider a place where the noise and the air discharged will
not aect neighbours.
• Consider a position protected from the wind.
• Consider an area that reects the minimum spaces
recommended.
• Consider a place that does not obstruct the access to doors or
paths.
• The surfaces of the oor must be solid enough to support the
weight of the heat pump and minimise the transmission of
noise and vibration.
• Take preventive measures so that children cannot reach the
unit.
• Install the heat pump in a place where it will not be inclined
more than 5°.
• When installing the heat pump where it may exposed to strong
wind, brace it securely.
• If the Aerona³ heat pump is to be installed within 1 mile of the
coast, avoid siting facing the sea.
• If the Aerona³ heat pump is to be installed within 15 miles of
the coast, the evaporator must be sprayed with AFC50 and this
must be repeated on each annual service.
Decide the mounting position as follows:
1. Install the heat pump in a location which can withstand the
weight of the heat pump and vibration. please make sure it
installed level.
2. Provide the indicated space to ensure good airow.
3. Do not install the heat pump near a source of heat, steam or
ammable gas.
4. During heat pump operation, condensate water ows from the
heat pump. Therefore, install the heat pump in a place where
the condensate water ow will be obstructed.
5. Do not install the heat pump where strong wind blows directly
onto the heat pump or where it is very dusty.
6. Do not install the heat pump where people pass frequently.
7. Install the heat pump in a place where it will be free from
adverse weather conditions as much as possible.
All heat pumps make a noise. Discuss the potential nuisance factor
with the end-user when considering the nal position of the heat
pump. Take opening windows and doors into account. It is not
essential for the heat pump to be positioned next to a wall of the
house. Behind an out-building may be more suitable so discuss the
options with the end-user.
3.4.3 Orientation
The North face of the building will usually have colder ambient air
than any other side. To ensure maximum eciency from the Grant
Aerona³ heat pump, position the heat pump on a warmer side. In
order of preference, site the heat pump on a South face followed by
either South East or South West, then by East or West. Only install
on a North face if there is no other alternative.
The heat pump should be installed on a at trowelled nished
concrete base 150mm thick. This base should extend at least
150mm beyond the heat pump on three sides.
To avoid bridging the DPC, leave a gap of at approximately 150mm
between the concrete base and the wall of the house.
The heat pump must be raised up from the base by approximately
100mm on suitable anti vibration mounts or blocks.
The following clearances must be used to enable the
product to be easily commissioned, serviced and maintained and
allow adequate air ow in and out of the heat pump.
Refer to Table 3-1 and Figure 3-2.
Clearances
Top 300
Bottom Approximately 100*
Front 600
Rear 300
Left 100
Right 600
* Height of A/V mounts (product code: HPIDFOOT/KIT)
003revO mm
Over 600 mm
Over 100 mm
Over 300 mm
Over 600 mm
HPID12
Clearances (applicable to all models)
the heat pump. Check that the air purge valve can operate.
• Take care that the components installed in the pipework can
withstand the water pressure.
The system connections of the heat pump must be carried out using
the exible hoses, valves and ttings supplied with the heat pump.
The hydraulic circuit must be completed following the
recommendations below:
1. It is important to install the isolation valves between the heat
pump and the building.
2. The system must have drain cocks in the lowest points.
3. Air vents must be included at the highest points of the system.
4. A system pressure gauge must be installed upstream of the
heat pump.
5. All pipework must be adequately insulated and supported.
6. The presence of solid particles in the water can obstruct the
heat exchanger. Therefore, protect the heat exchanger using a
magnetic lter such as a Grant Mag-One.
7. After system assembly ush and clean the whole system,
paying particular attention to the state of the lter.
8. A new installation must be thoroughly ushed and cleaned
before lling and adding anti-freeze/biocide/inhibitor.
! WARNING !
For details on how to install the remote controller, refer to Section 7.
For setting, refer to Section 9.
The current OFGEM requirements for the metering of ASHP
installations for the domestic RHI involve both ‘metering for
payment’ and ‘metering for performance’.
Many domestic ASHP installations will not be required to be
metered for payment, i.e. will not require a heat meter to be tted.
The RHI payment will be based on the EPC annual heat pump
demand for the property concerned.
Even if an ASHP installation is not required to be metered for
payment, it must be ‘meter ready’ in accordance with MCS
requirements. Refer to the MCS Domestic RHI Metering Guidance
document for full details.
However, some domestic installations must be metered for
payment if:
a) The property is occupied for less than 183 days per year, e.g.
a second home or holiday home.
b) If there is a ‘back-up’ heating system installed, e.g. a fossil fuel
appliance is used alongside the ASHP (such as with a hybrid
system).
In the case of ‘self build’ (or ‘custom build’) homes, if the
homeowners move into the property before the system is
commissioned and have not lived in the property for a minimum
of 183 days, the installation will either have to be metered for
payment or they must wait at least 183 days before applying for the
RHI.
A heat meter must be installed and regular meter readings will
have to be submitted as the RHI payment will be determined from
these readings.
The underside of the heat pump has a condensate outlet (refer to
Figure 3-3) that allows any condensate to drain from the heat pump.
Provision must be made to safely collect and dispose of the
condensate.
For example, use 40 mm waste pipe to form a condensate disposal
system into which the condensate ows from the opening in the
bottom of the heat pump casing running to a suitable gulley or
soakaway.
! WARNING !
Condensate outlet
Condensate outlet
If the vibration from the heat pump is likely to cause a nuisance, use
the anti-vibration mounts (product code: HPIDFOOT/KIT2) and x
the heat pump securely to the mounts.
The complete water circuit, including all pipework, must be
insulated to prevent heat loss reducing the eciency of the heat
pump and also to prevent damage due to frozen pipes.
• Water connections must be made in accordance with diagram
in this manual and the labels on the heat pump.
• Be careful not to deform the heat pump pipework by using
excessive force when connecting.
• Pipework should be ushed before connecting the heat pump.
• Hold the pipe end downwards when removing burrs.
• Cover the pipe end when inserting it through a wall so that no
dust and dirt enter.
•
Before continuing the installation of the heat pump, check the
following points:
• The maximum system water pressure is 3 bar.
• Make sure the hose is connected to the pressure relief valve to
avoid any water coming into contact with electrical parts.
• Air vents must be provided at all high points of the system. The
vents should be located at points which are easily accessible
for servicing. An automatic air purge valve is provided inside
From the 22nd May 2018, all ASHP installation must be ‘metered
for performance’ to meet OFGEM requirements for the Domestic
RHI.
This basically requires that all ASHPs must be tted with one (or
more) electricity meters to record and display the electricity used
by:
• The ASHP
• Any supplementary heaters for space heating, (e.g. an
immersion heater in a buer tank) controlled by the same
control system as the ASHP.
• Any immersion heater used to heat domestic hot water (DHW)
controlled by the same control system as the ASHP (e.g. using
a Grant Auto Boost Kit 2)
This metering on the electrical supply to the heat pump is NOT
used to determine the Domestic RHI payment but to allow users to
monitor the energy consumption and performance of their system.
Domestic RHI payments will continue to be based on either the
EPC annual heat demand or a heater meter reading. Refer to
‘meter for payment’ section for details.
The electricity meter (or meters) used may be installed as either
a separate ‘stand-alone’ meter for each device used, i.e. this may
require up to three mters to be used on a single installation or a
single ‘stand-alone’ meter for all devices used.
Where a single meter is used for more than one device, a separate
sub-consumer unit will also be required to provide separate
proection and isolation for each device concerned.
The electricity meters used must be MID compliant and Class A or
better, remembering that classes B and C are better than A.
A ‘Volumiser’ tank is simply a vessel used to increase the volume
of the system, to meet the system requirements as given below.
It will have only two connections, one inlet and one outlet, and it
must be tted in the return to the heat pump. Refer to Figure 3-5.
A ‘Volumiser’ tank will be required for the Grant Aerona³
HPID12R32 (12kW) heat pumps when:
• The overall system volume is less than 100litres
AND
• If the part of the system connected to the heat pump is less
than 30 litres during the normal operation of the system
For example:
• When the heating zone valves(s) are closed leaving only the
primary circuit to a cylinder connected to the heat pump,
OR
• When the hot water zone valve is closed leaving a heating
zone (or zones) connected to the heat pump
The ‘Volumiser’ tank must be large enough to ensure that the
volume of that part of the system will be at least 30 litres.
The water pump, tted in the heat pump, is supplied factory set at
Level 3 (maximum output). It is unlikely that this level of output will
be required, so it is recommended that the pump output is reduced
to either Level 2 (medium output) or Level 1 (minimum output) as
required. This will usually be indicated by achieving a temperature
dierence between the heat pump ow and return of approximately
8°C when the heating system is operating and up to temperature.
Refer to Section 8.3.6 for guidance on how to do change the pump
output level.
To determine the temperature dierence between ow and return,
check the ow and return temperatures using the ‘Monitor Display
Function’ on either the remote controller or Terminal PCB. Refer
to Section 10.7 for guidance on how to check the ow and return
water temperatures.
A 30 litre ‘Volumiser’ tank, suitable for this purpose, is available
from Grant UK (product code: HPIDVOL30). For further
information, please contact Grant UK on +44 (0)1380 736920.
When a Grant Aerona³ HPID12R32 (12kW) heat pump is used with
any model of Grant Heat Pump hot water cylinder, either a single
or twin coil unit, a simple bypass MUST be tted between the
primary ow and return pipes at the cylinder.
This bypass consists of a 22mm pipe between the primary ow and
return pipes, tted with a 22mm gate valve.
Refer to Figure 3-4 for details.
2
1
2 3
4
5 6
7
8
9
15
Static head of system
10 11
10 11
13
14
12
16
Cylinder coil bypass
This bypass must be set during commissioning, as follows:
First, set the water pump output to Level 1 (minimum). Refer to
Section 8.3.6.
With the system operating to only heat the cylinder (i.e. with no
space heating demand), progressively open the gate valve and
reduce the ow of water through the cylinder coil enough to prevent
any water ow noise from the cylinder.
! NOTE !
Key
Key
1 Expansion vessel
2 Pressure gauge
3 Pressure relief valve
4 Tundish
5 Removable lling loop
6 Double check valve
7 Automatic air vent
8 Thermostatic radiator valve
9 Automatic bypass
10 Flexible hose
11 Isolation valve
12 Volumiser
13 Motorised 2-port valves
14 Optional additional circulating pump
(refer to Section 8.3.7)
15 Drain point
16 Bypass - HPID12R32 only
Monovalent system - with S-Plan type controls
2
1
23
4
56
78
9
15
Static head of system
10 11
10 11
13
14
12
16
SCALE:
REVISION:
DRAWN BY:
DATE:
DRAWING TITLE: DRAWING No:
SCALED TO FIT
1.0
SIMON VEITCH
23/08/2018 ASHP with volumiser N/A
Optional
Highest point of the primary circuit
Centre of expansion vessel
To avoid the danger of dirt and foreign matter entering the heat
pump the complete heating system should be thoroughly ushed
out – both before the heat pump is operated and then again after
the system has been heated and is still hot.
This is especially important where the heat pump is installed as
a replacement for a boiler on an existing system. In this case the
system should be rst ushed hot, before the old boiler is removed
and replaced by the heat pump.
For optimum performance after installation, this heat pump and
the central heating system must be ushed in accordance with the
guidelines given in BS 7593 ‘Treatment of water in domestic hot
water central heating systems’.
This must involve the use of a proprietary cleaner, such as Sentinel
X300 or X400, or Fernox Restorer.
After ushing, a suitable thermal uid should be used (such as
Sentinel R600) specically designed for use in air source heat
pump installations. This provides long term protection against
corrosion and scale as well as the risk of the freezing in the
external section of the heating system (i.e. the exible hoses,
condenser and circulating pump within the heat pump casing) in
the event of power failure during winter months.
In order to avoid bacterial growth, due to the lower system
operating temperatures, a suitable Biocide (such as Sentinel R700)
should also be used in conjunction with the thermal uid. Both the
thermal uid and biocide should be added to the system water
when nally lling the heating system.
Alternatively, Fernox HP-5C can be used. This is a suitable
thermal uid that protects against corrosion, scale and bacterial
growth and also provides frost protection. The level of frost
protection depends on the percentage concentration used.
Grant recommends using a suitable thermal uid to give a
MINIMUM level of frost protection of -9°C, and down to lower
temperatures than this where local conditions are more severe.
Follow the instructions on the correct use of thermal uids and
biocides supplied with the products. Further information can be
obtained from either www.sentinel-solutions.net or www.fernox.
com.
! NOTE !
Failure to implement the above guidelines for fully ushing the
system and using a suitable thermal uid to provide adequate
protection against corrosion, scale, bacterial growth and freezing
will invalidate the heat pump product guarantee.
Antifreeze concentration
10% 20% 30% 40%
Correction
factor
Capacity 0,996 0,991 0,983 0,974
Power absorbed 0,990 0,978 0,964 1,008
Pressure drop 1,003 1,010 1,020 1,033
* The temperature values are indicative. Always refer to the temperatures given for the specied product used.
For details of how to access the parameter settings, refer to Section 9.3.
* As measured by gauss. The Mag One magnetic lter has a gauss
measurement of 12000.
This function is factory set to ON, i.e. DIP SW1 is set to ON (up
position).
With the frost protection function set to ON, it will operate as
described in Sections 8.4.1, 8.4.2 and 8.4.3.
This function is not required if ethylene glycol is used in the heating
system water to prevent freezing.
If a suitable concentration of ethylene glycol (heating system
antifreeze) is used in the system water. Refer to Table 3-7 for
suitable antifreeze concentrations or follow the manufacturer’s
instructions supplied with the antifreeze.
If not required, frost protection function can be disabled as follows:
• Remove the wiring cover at the right hand end of the heat
pump. Refer to Figure 6-1.
• Set DIP SW1 to OFF (down position). Refer to Figure 3-8.
• Replace the wiring cover and secure in place with the screws
provided.
Terminal PCB
ON
1
OFF
DIP SW. position
2 3 456 7 8
Anti-freeze function setting
! NOTE !
To do this, use the remote controller as follows (refer to Section 9.1
page 46):
First access the Installer level:
1. Press and hold the Menu l and the – or + o buttons together
for 3 seconds to enter the installer level.
2. “InSt” parameter number “00 00” and parameter value “---
-“ will be shown on the display. The rst two digits of the
parameter number will be blinking.
• The vibration damping feet/shoes are tted (if supplied)
• The heat pump is xed to the surface or mountings that it rests
on
• Maintenance clearances comply with those given in this
manual
• The position of the remote controller complies with the
guidance given in this manual
• All safety requirements have been complied with
• Water connections have been carried out as per the
information in this manual
• All water connections are tight with no leaks
• The magnetic in-line lter is installed on the primary circuit
return as close to the heat pump as possible but still within
the building and in a position that is easy to access for
maintenance
• The pressure gauge with a suitable scale is installed on the
sealed system pipework or expansion vessel manifold
• The connection pipes are suitably supported so that these do
not weigh on the appliance
• The expansion vessel installed on the heating circuit is suitably
sized
• The low-loss header or volumiser tank is installed if the water
content is insucient (HPID12R32 unit only - refer to Section
3.8)
• The water circuit has been thoroughly ushed
• The air vent valves are installed at the highest points on the
system
• There is no air in the system (vent if necessary)
• The shut o valves are installed on the inlet/outlet of system
circuit
• The drain valves are installed at the lowest points in the
system
• The exible hoses are installed on the inlet/outlet of system
circuit
• The system water content complies with the specication in the
manual
• The DHW immersion heater has been installed in DHW tank
for Legionella prevention
• Suitable water ow rate for operation of the entire heat pump is
achieved as specied in this manual. Refer to Section 9.12
• All pipes are insulated with suitable vapour barrier material to
prevent formation of condensation and heat loss, with control
and shut-o devices protruding from the insulation
• All electrical connections are secure
• Electrical connections have been carried out correctly
• Voltage is within a tolerance of 10% of the rated voltage for the
heat pump (230V)
• Electrical power supply complies with the data on the rating
plate and as specied in the manual
• The earth wires are connected securely
Then, access the Service level:
1. Use the Up or Down q buttons to change these rst two digits
to 99 and then press the + button o.
2. The second two digits will then blink. Use the Up or Down q
buttons to change these two digits to 99 and then press the
Set button p.
3. The parameter value on the display will now be ‘0’.
4. Use the ‘Up’ and ‘Down’ (8) buttons to change the parameter
value to “738” and then press the ‘Set’ (7) button.
Now, reset the value for parameter 4300 to 0 (disabled):
1. The rst two digits of the 4-digit parameter number (the
parameter group number) will blink.
2. Set the parameter group number to 43 using the Up or Down
qbutton.
3. Press the + buttons oand the second two digits (the
parameter code) will blink.
4. Set the parameter code number to 00 using the Up or Down
qbutton.
5. Press Set button pand the parameter value 4300 (1 =
enabled) will be displayed and will blink.
6. Reset the parameter value 4300 to 0 (disabled) using the Up
or Down qbutton.
Repeat this process to reset the values of parameters 4310, 4320
and 4330 to 0.
Return to normal operation:
Press and hold the Menu land the –or +obuttons together for
3 seconds or simply leave the remote controller for 10 minutes.
! NOTE !
Please ensure that the heat pump commissioning form (supplied
with the heat pump) is completed in full and that it is signed by the
householder/user.
Leave the copy with the user and retain one copy for your own
records.
Ensure that these installation and servicing instructions and the
user instructions are handed over to the householder.
Frost protection parameters
Min. Unit
S 43 00 Frost protection on room temperature
0=disable 1=enable 101 -
S 43 10 Frost protection by outside temperature
0=disable 1=enable 101 -
S 43 20 Frost protection based on outgoing water temperature
0=disable 1=enable 101 -
S 43 30 DHW storage frost protection
0=disable 1=enable 101 -
2
1
23
4
56
78
9
15
Static head of system
10 11
10 11
13
14
12
16
SCALE:
REVISION:
DRAWN BY:
DATE:
DRAWING TITLE: DRAWING No:
SCALED TO FIT
1.0
SIMON VEITCH
23/08/2018 ASHP with volumiser N/A
Sealed System heating components
4
Sealed System heating components key
Key
1 Expansion vessel
2 Pressure gauge
3 Pressure relief valve
4 Tundish
5 Removable lling loop
6 Double check valve
7 Automatic air vent
8 Thermostatic radiator valve
9 Automatic bypass
10 Flexible hose
11 Isolation valve
12 Volumiser
13 Motorised 2-port valves
14 Optional additional circulating pump
(refer to Section 8.3.7)
15 Drain point
16 Bypass (HPID12R32 only)
All Grant Aerona³ heat pumps must be used with sealed systems
complying with the requirements of BS EN 12828, BS EN 12831
and BS EN 14336.
The system must be provided with the following items:
• Diaphragm expansion vessel complying with BS EN 13831
• Pressure gauge
• Pressure relief (safety) valve
• Approved method for lling the system
The expansion vessel can be tted in either the return or ow
pipework in any of the recommended positions as shown in Figure
4-1. To reduce the operating temperature of the expansion vessel,
position it below the pipe to which it is connected.
The expansion vessel may be positioned away from the system,
providing the connecting pipe is not less than 13 mm diameter. If
the expansion vessel is connected via a exible hose, care must
be taken to ensure that the hose is not twisted.
! NOTE !
Optional
Highest point of the primary circuit
Centre of expansion vessel
The pressure gauge must have an operating range of 0 to 4 bar.
It must be located in an accessible place next to the lling loop for
the system.
The safety valve (provided with the heat pump) is set to operate
at 3 bar. It should be tted in the ow pipework near to the heat
pump.
The pipework between the safety valve and heat pump must be
unrestricted, i.e. no valves. The safety valve should be connected
to a discharge pipe which will allow the discharge to be seen, but
cannot cause injury to persons or damage to property.
Provision should be made to replace water lost from the
system. This can be done manually (where allowed by the local
water undertaking) using an approved lling loop arrangement
incorporating a double check valve assembly.
The lling loop must be isolated and disconnected after lling the
system.
The maximum ‘setpoint’ temperature for the central heating water
is 55°C.
An automatic air vent should be tted to the highest point of the
system.
If thermostatic radiator valves are tted to all radiators, a system
by-pass must be tted. The by-pass must be an automatic type and
correctly set when the system is commissioned.
All ttings used in the system must be able to withstand pressures
up to 3 bar. Radiator valves must comply with the requirements of
BS 2767:1991.
One or more drain taps (to BS 2879) must be used to allow the
system to be completely drained.
Filling of the system must be carried out in a manner approved by
the local Water Undertaking.
! WARNING !
The procedure for lling the sealed system is as follows:
1. Check the air charge pressure in the expansion vessel
BEFORE lling the system.
The expansion vessel charge pressure should always be
approximately 0.2 bar lower than the maximum static head of
the system, at the level of the vessel (1 bar = 10.2 metres of
water).
Refer to Figure 4-1.
2. Check that the small cap (or screw) on all automatic air vents
is open at least one turn. The cap (or screw) remains in this
position until lling is completed and then it is closed.
3. Remove front right casing and loosen the plug on the
automatic air vent located inside the heat pump. Refer to
Figure 4-3.
loosen
tighten
Auto air vent
Plug
Auto Air Vent
4. Ensure that the exible lling loop is connected and that the
double check shut o valve connecting it to the water supply is
closed. A valve is open when the operating lever is in line with
the valve, and closed when it is at right angles to it.
5. Open the ll point valve.
6. Gradually open the double check valve from the water supply
until water is heard to ow.
7. When the needle of the pressure gauge is between 0.5 and
1.0 bar, close the valve.
8. Vent each radiator in turn, starting with the lowest one in the
system, to remove air.
9. Continue to ll the system until the pressure gauge indicates
between 0.5 and 1.0 bar. Close the ll point valve. The system
ll pressure (cold) should be 0.2 - 0.3 bar greater than the
vessel charge pressure – giving typical system ll pressures
of approx 0.5 bar for a bungalow and 1.0 bar for a two storey
house.
Refer to the Domestic Heating Design Guide for further
information if required.
10. Repeat steps 8 and 9 as required until system is full of water
at the correct pressure and vented.
11. Water may be released from the system by manually
operating the safety valve until the system design pressure is
obtained.
12. Close the ll point and double check valves either side of the
lling loop and disconnect the loop.
13. Check the system for water soundness, rectifying where
necessary.
! NOTE !
Check the operation of the pressure relief (safety) valve as follows:
1. Turning the head of the valve anticlockwise until it clicks. The
click is the safety valve head lifting o its seat allowing water
to escape from the system.
2. Check that the water is escaping from the system.
3. Top-up the system pressure, as necessary.
! NOTE !
If a DHW demand is made, the heat pump will continue to provide
space heating for a minimum period of 15 minutes (parameter 3122
- refer to Table 5-1). If space heating is already being demanded
and has been on for this minimum period, then the heat pump will
change over to prioritise DHW.
In either case, once DHW is being provided, the ow temperature
will target 55°C, irrespective of the space heating target
temperature. Also note that there is no weather compensation
control when in DHW mode.
The time limit for DHW can be set using parameter 3121. The
default setting is 60 minutes but you may want to increase or
decrease this time period. After this time period has been reached,
the heat pump will default back to the original demand that was in
place prior to the DHW demand or to a stand by state if the change
is demand state occurred during the DHW demand.
If the unit times out on parameter 3121, remember the motorised
valve of the DHW circuit will remain open as it is controlled by
the cylinder thermostat and not the heat pump and will not heat
up to the correct temperature when using the space heating ow
temperature. It is also possible that the cylinder could be robbed of
heat to the space heating circuit if the stored water is hotter than the
ow temperature to the space heating circuit.
If the motorised valve for space heating is open during DHW
demand, the 55°C ow temperature will also enter the space
heating circuit, increasing the recovery time of the cylinder.
To minimise this high temperature period and higher than normal
running costs, ensure that space heating and DHW demand times
to not occur simultaneously.
5
DHW and space heating parameters
Min. Unit
I 31 21 Maximum time for DHW request 60 0 900 1 min
I 31 22 Minimum time for space heating 15 0 900 1 min
For details of how to access the parameter settings, refer to Section 9.3.
As the water temperature from the heat pump is lower than from
a traditional system using a boiler, a much larger coil is required
inside the cylinder to transfer the heat eciently.
Grant UK has developed a 200 litre high-eciency cylinder (Band
A) for use with a combination heat pump. Other Band B and C
cylinders are available but consideration should be given to system
eciency.
In order to ensure that a minimum of at least 8K temperature
dierence is maintained between cylinder ow and return, the
correct Grant UK heat pump cylinder must be selected to match the
heat pump output.
Failure to use the correct cylinder can result in a reduced heat
transfer in the cylinder and a lower temperature dierential.
It is possible to use the heat pump to raise the HW cylinder to
around 50 to 55°C.
For protection against Legionella the temperature can be
periodically raised to 60°C using the Grant Automatic DHW Boost
Kit 2, available from Grant UK (product code: HPDHWBK2).
This boost kit also allows the cylinder immersion element to be used
to raise the temperature to 60°C for one hour either daily or weekly
to sterilise the cylinder against Legionella.
! NOTE !
Care must be given to vulnerable people who may be exposed
to potentially life-threatening legionella. This group of people
include the elderly, pregnant women, young children and those with
breathing diculties.
Care must also be given to households who do not use a lot of
water on a daily basis. While this chart is not exhaustive, it is
important that you discuss any potential issues with the occupants
before deciding on the appropriate regime. It is important that
this decision is based on the welfare of the occupants and not on
energy saving measures.
Legionella group sanitisation regime
Vulnerable Group
Store at 50°C and
raise hot water
cylinder to 60°C for 1
hour every day
Store at 50°C and
raise hot water
cylinder to 60°C for 1
hour every 3 days
Non-Vulnerable Group
Store at 50°C and
raise hot water
cylinder to 60°C for 1
hour every week
Store at 50°C and
raise hot water
cylinder to 60°C for 1
hour every 2 weeks
! WARNING !
This system uses both the existing cylinder immersion heater and
cylinder thermostat. This is switched via a contactor operated
by a small timeswitch, both enclosed in a separate unit to be
mounted next to the cylinder. Thus the immersion element can be
programmed to operate for the required period on either a daily or
weekly basis.
Once set, this system is fully automatic but can be overridden by
the user if required. Also, the user can still switch the immersion
element o, via the immersion heater switch, irrespective of the
programmer or cylinder thermostat setting or whether the heat
pump is operating.
The Automatic DHW Boost Kit 2 comes pre-wired within its
enclosure, ready for installation. The connections to the Immersion
heater switch, Immersion heater and cylinder thermostat must be
made after it is installed on site.
When installed, this kit interrupts the electrical supply between the
existing immersion heater switch and immersion heater. Refer to
Figure 5-4 for electrical connection details.
In order to connect and use this kit the existing cylinder thermostat
must have two output terminals; one ‘make on rise’ (normally open)
contact and the other ‘break on rise’(normally closed) contact. If not,
then the cylinder thermostat MUST be replaced with one that does
have two output terminals.
The use of any other type of cylinder thermostat, or any modication
to an existing thermostat, will invalidate the product guarantee and
may result in a potentially dangerous installation.
! WARNING !
! NOTE !
To set the timeswitch use the following procedure:
1. Press and hold down the ‘clock’ button throughout the ‘time
and day’ setting process.
2. Press ‘h+’ button repeatedly to set hour (24 hour clock).
3. Press ‘m+’ button repeatedly to set minutes.
4.
! NOTE !
Press the ‘day’ button repeatedly to scroll through to required
day of week.
5. Release the ‘clock’ button. The clock is now running as
indicated by the ashing colon.
You can set up to six ON and OFF commands per day, if required,
as follows:
1. Press the ‘timer’ button. The actual time will disappear from the
display. The rst ‘ON’ indication will be displayed.
2. Press ‘h+’ button repeatedly to set hour (24 hour clock).
3. Press ‘m+’ button repeatedly to set minutes.
4. Press the ‘day’ button repeatedly to scroll through day options
– each single day, all weekdays, weekend and entire week.
5. Press the ‘timer’ button again. The rst ‘OFF’ indication will be
displayed.
6. Repeat steps 2 to 4 (above) to set rst OFF time – hours
minutes and day.
7.
! NOTE !
Press the ‘timer’ button again. The second ‘ON’ indication will
be displayed.
8. Repeat the above procedure to set second ON and OFF times,
if required.
9. After setting all required ON and OFF times – press the ‘clock’
button to return to current time display.
Repeatedly press the ‘timer’ button to scroll through all ON and
OFF settings.
When a setting is showing on the display – press the ‘h+’ ‘m+’ or
‘day’ buttons to alter the setting as required.
1. Press the ‘timer’ button until the ‘ON’ setting for the period to
be deleted is displayed.
2. Press the ‘h+’ button repeatedly until ‘- -‘ appears (after 23
hours).
3. Press the ‘m+’ button repeatedly until ‘- -‘ appears (after 59
minutes).
4. Press the ‘timer’ button and the ‘OFF’ setting for the period to
be deleted is displayed.
5. Repeat steps 2 and 3 (above) to delete the ‘OFF’ setting.
6. Press the ‘timer’ button to save the amended command.
7. The deleted ON/OFF period is now available for re-
programming if required.
8. Press the ‘clock’ button to return to the current time display.
If timeswitch is ON - press the ‘override’ button to set timeswitch to
OFF.
If timeswitch is OFF – press the ‘override’ button to set timeswitch
to ON.
! NOTE !
With the Automatic DHW Boost Kit 2 tted, the HW cylinder
thermostat should be set to between 50 and 55°C for optimum
operation. When the heat pump raises the cylinder to this
temperature the cylinder thermostat will be ‘satised’ and switch to
the ‘make on rise’ or ‘normally open’ connection.
The HW zone valve, being no longer fed from the cylinder
thermostat, will close.
The resulting switched live from the normally open contact of the
cylinder thermostat supplies power to terminal 3 on the Boost Kit
timeswitch. See Figure 5-4.
When the timeswitch contact closes, at the pre-set time, the output
from terminal 4 of the timeswitch energises the contactor coil,
closing the contactor contacts and connecting the output from the
Immersion heater switch to the immersion heater.
If, whilst the immersion heater is in operation, hot water is drawn
o and the temperature in the cylinder falls to below the cylinder
thermostat setting, the cylinder thermostat will operate and interrupt
the power supply to the Boost kit and the immersion heater will stop
operating.
In this case the heat pump will receive a HW demand to operate, to
heat the HW cylinder.
If the amount of hot water drawn o is small, the temperature drop
in the cylinder may be minimal and the cylinder thermostat may not
detect it.
In this case the cylinder thermostat will continue to supply power to
the Boost kit. The Immersion heater will continue to operate and no
HW demand will be sent to the heat pump.
IMPORTANT
There must be a demand from the HW channel of the heating/hot
water programmer for the Automatic DHW Boost Kit 2 to operate
when required. When setting the ON periods on the Auto Boost
Kit timeswitch, ensure that they are within a HW ON period on the
programmer.
! WARNING !
Table of contents
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