Grant Aerona3 HPID13R32 User manual

UK | DOC 0183 | Rev 1.0 | November 2022
Grant
External Volumiser
Installation Instructions

This manual is accurate at the date of printing but will be superseded and should be disregarded if specications and/or appearances are changed in the interests of continued product improve-
ment. 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 o󰀩cial Conditions of Sale, a copy of which may be obtained on application.
© Grant Engineering (UK) Limited. No part of this manual may be reproduced by any means without prior written consent.
IMPORTANT NOTE FOR USERS
These installation instructions are intended to guide the installer in
the installation of the Grant External Volumiser.
SPECIAL TEXT FORMATS
The following special text formats are used in these instructions
for the purposes listed below:
! WARNING !
Warning of possible human injury as a consequence of not
following the instructions in the warning.
! CAUTION !
Caution concerning likely damage to equipment or tools
as a consequence of not following the instructions in the
caution.
! NOTE !
Used for emphasis or information not directly concerned
with the surrounding text but of importance to the reader.
Page 2
PRODUCT CODES COVERED
These instructions cover the following product codes:
Product code Product Description
HPIDVOL30EXT Grant 30 litre External Volumiser
SERVICING
The External Volumiser should be inspected at least every twelve
months, when the heat source and/or heating system is serviced.
GRANT ENGINEERING (UK) LIMITED
Frankland Road, Blagrove Industrial Estate, Swindon, SN5 8YG
Tel: [phone] Fax: [phone]
Email: [email protected] www.grantuk.com

1 INTRODUCTION 4
1.1 General 4
1.2 Product contents 4
1.3 Pipe ttings for HPID6R32 only 4
2 TECHNICAL DATA 5
2.1 Technical specication 5
2.2 Dimensions 5
3 INSTALLATION 6
3.1 General 6
3.2 Regulations and Standards 6
3.3 Location 6
3.4 Clearances 6
3.5 Unpacking 6
3.6 Installation procedure 6
3.7 System connections 7
4 ELECTRICAL 11
4.1 General 11
4.2 Electrical connections 11
4.3 Immersion heater 12
5 OPERATION 14
5.1 General 14
5.2 Aerona³ heat pump parameter
settings 14
6 DECLARATION OF CONFORMITY 15
7 GUARANTEE 16
NOTES 18
! NOTE !
These Installation Instructions must be read in conjunction
with the Aerona³ Installation and Servicing Instructions
supplied with the heat pump.
Contents Page 3
CONTENTS

Section 1: IntroductionPage 4
1.1 GENERAL
A ‘volumiser’ is simply a vessel used to increase the volume of the
heating system connected to the heat pump. It has one inlet and
one outlet for connection to the heat pump and heating system.
The Grant External volumiser can be used in the following
situations:
a) Where there is insu󰀩cient water volume in the heating
system connected to the heat pump.
b) Where there is no available space inside the property to
accommodate a volumiser/low loss header, such as the
Grant combined volumiser/low loss header.
c) When a plate heat exchanger is used to provide hydraulic
separation between the heat pump and the heat emitter
circuits.
The Grant External 30 litre volumiser is an insulated rectangular
tank tted with a single 3kW electric immersion heater and is
designed for use with the Grant Aerona³ air source heat pumps.
This is housed within a weatherproof external casing with a
removable cover at one end to access the electrical connections
and immersion heater.
It is designed to be located behind the Aerona³ heat pumps, on
the same anti-vibration mounts (Grant product code: HPIDFOOT/
KIT2) as the heat pump, using the mounting brackets provided
with the volumiser. See Figure 1-1.
1 INTRODUCTION
Figure 1-1: Grant External Volumiser behind Aerona³ heat pumps
HPID13R32 & HPID17R32 HPID10R32 HPID6R32
! NOTE !
This volumiser is designed to be installed in the ow from
the heat pump.
The volumiser has two pipe connections located on the upper
surface of the unit. Refer to Figure 2-1. These are 28mm
compression connections. Refer to Section 3.6 for further details
on the connections to the external volumiser.
The exible hoses supplied with the Grant Aerona³ will be used to
connect the External Volumiser to the heat pump.
The 3kW electric immersion element is supplied, factory tted
and located inside a removable panel at the right-hand side of the
volumiser (viewed from the front).
It is intended to provide a backup heat source controlled by the
Grant Aerona air source heat pump to which it is connected. Refer
to Section 4 – Electrical.
The shell of the volumiser is a mild steel welded construction,
insulated with mineral wool. This is enclosed within an outer
galvanised steel casing with a powder coated paint nish to match
the casing of the heat pump.
The volumiser is tted with a ½” drain cock, located to the left of
the immersion heater, to allow the volumiser to be drained down if
required.
! WARNING !
The immersion heater must NOT be used unless it is fully
immersed in water. Always ensure that the electrical supply
to the volumiser/immersion heater is isolated BEFORE
draining down the volumiser.
Always ensure that volumiser is fully relled with water
BEFORE switching the electrical supply back on
1.2 PRODUCT CONTENTS
The Grant External Volumiser is supplied as a pack, in a box,
containing the following items:
• 1 x External Volumiser c/w immersion heater
• 2 x Mounting Brackets
• 1 x Cable gland M20mm
• 1 x Cable gland M16mm
• 1 x Installation instructions
1.3 PIPE FITTINGS FOR HPID6R32 ONLY
As the INLET on the top of the external volumiser is higher than
the ow connection on the back of the HPID6R32 heat pump, an
elbow with an integral manual vent must be tted to the volumiser
inlet to allow the volumiser to be vented of any air. Refer to Figure
3-8.
The necessary 22mm compression elbow with integral manual
air vent is supplied with the heat pump for this connection
arrangement.
Two 28mm x 22mm compression reducing sets are also supplied
with the heat pump. These to allow 22mm pipe to be connected to
the 28mm inlet and outlet connections on the external volumiser.
Refer to Figure 3-9.

Section 2: Technical data Page 5
Table 2-1: External Volumiser technical data
Grant External Volumiser
Nominal capacity (litres) 30
Actual capacity (litres) 28
Weight - empty (kg) 31
Weight - full (kg) 59
Inlet/outlet connections 28mm compression
Drain cock connection ½” BSP
Materials
Shell Mild steel
Outer casing Galvanised mild steel, polyester powder coated
Insulation Mineral wool
Immersion Heater
Make Cotherm TSR
Output (kW) 3
Electrical supply 230V 50Hz 1ph
2.1 TECHNICAL SPECIFICATION
2 TECHNICAL DATA
2.2 DIMENSIONS
Figure 2-1: Grant External Volumiser dimensions
DWG NO: REV:
912 30LTR EXTERNAL VOLUMISER C_W IMMERSION.asm
26/11/21 22645 0
DATE:
JOB TITLE:
30LTR EXTERNAL VOLUMISER
C_W IMMERSION
DRAWING TITLE:REV DESCRIPTION: REV DATE:
134 454
816
CABLE GLAND
KNOCK-OUT
(EACH SIDE)
67
152
240
INLET FROM HEAT-PUMP
28MM COMPRESSION
OUTLET TO SYSTEM
28MM COMPRESSION
CABLE GLAND
KNOCK-OUT
368
400

Section 3: InstallationPage 6
3 INSTALLATION
3.1 GENERAL
This section gives details of the installation process for the Grant
External Volumiser with backup immersion heater.
These installation instructions must be read in conjunction with
the Grant Aerona³ air source heat pump installation instructions
(provided with the heat pump).
Before starting any installation work on the Grant Aerona³ air
source heat pump and external volumiser, please read the
Health and Safety information given in Section 14 of the Aerona³
Installation Instructions.
3.2 REGULATIONS AND STANDARDS
The installation of the Grant Aerona³ air source heat pump and
the External Volumiser must be in accordance with the following
recommendations, as applicable:
• Building Regulations for England and Wales, and Building
Standards for Scotland
• Local Bylaws (check with the Local Authority for the area)
• Water Supply (Water Fittings) Regulations 1999
• MCS Installer Standards (if applying for the Renewable Heat
Incentive)
• MIS3005 Requirements for contractors undertaking the
supply, design, installation, set to work, commissioning
and handover of microgeneration heat pump systems.
• MCS020 MCS Planning Standard
The installation should also be in accordance with the latest
edition of the following standards and Codes of Practice:
• BS7671 and amendments
• BS EN 12831
3.3 LOCATION
Refer to the Grant Aerona³ air source heat pump installation
instructions (provided with the heat pump) for the details and
requirements on the location of the heat pump and the clearances
required.
3.4 CLEARANCES
With the external volumiser mounting brackets tted into heat
pump AV mounts (as described in Section 3.6) there will be a gap
of approximately 100mm between the back of the heat pump and
the front face of the external volumiser.
If the rear face of the volumiser is 50mm from the wall, this will
leave a distance of approximately 400mm between the wall and
the back of the heat pump.
3.5 UNPACKING
The Grant External Volumiser is supplied in a cardboard carton.
Please note that this is a two-man lift.
To remove it from this carton for installation, use the following
procedure:
• Lay a clean dust sheet, or similar on the ground to prevent
scratching the casing.
• Place the carton on the dust sheet taped joint uppermost.
• Cut the along taped joint and open the two aps of the
cardboard carton.
• Carefully tilt the carton over so the volumiser is resting on the
dust sheet.
• Lift the carton up and o󰀨 the volumiser
! NOTE !
Take care if cutting the tape with a knife not to damage the
volumiser casing immediately beneath.
3.6 INSTALLATION PROCEDURE
! NOTE !
These instructions apply when using the 600mm long
Grant anti-vibration mounts (AV mounts) only - Grant
product code: HPIDFOOT/KIT2.
1. Fit the volumiser mounting brackets to the AV mounts, as
follows:
• Identify the correct end of the mounting bracket to t into
the AV mount – see Figure 3-1.
• Insert this end of the mounting bracket into the metal
channel of the AV mount as far as it will go – i.e., until it
reaches the stop on the bracket. See Figure 3-2.
• Repeat with the second bracket and AV mount.
Figure 3-1: Mounting bracket
Step in bracket top edge
Figure 3-2: Fitting mounting bracket
2. Position the AV mounts in the required location, allowing for
the fact that the heat pump will be positioned at the front end
of the mounts.
If the backup immersion heater tted to the Grant External
Volumiser is to be used; remove the two semi-pierced
knockouts on the front face of the volumiser casing and t the
two cable glands supplied with the unit. Refer to Figure 3-3.
Semi-pierced knockouts
Figure 3-3: Semi-pierced knockouts in front face of volumiser

Section 3: Installation Page 7
! NOTE !
If the backup immersion heater is to be used ensure that
the two semi-pierced knockouts are removed BEFORE the
external volumiser is tted and piped up to the heat pump.
3. Fit the external volumiser onto the AV mounts, ensuring that
the ow and return connections are facing upwards and the
removable cover is at the right-hand end of the volumiser
when facing the heat pump from the front.
Refer to Figure 3-4.
Figure 3-4: Locating volumiser on mounting brackets
Figure 3-5: Volumiser mounting brackets
4. Ensure that the base of the External Volumiser is correctly
located between the two upward facing anges on both of the
mounting brackets. Refer to Figure 3-5.
5. Position the Aerona³ heat pump on the AV mounts, with the
front feet at the end of the metal channel of the mounts.
Tighten the four xing screws to secure the heat pump feet to
the AV mounts.
The gap between the rear of the heat pump and the front
of the External Volumiser should be approximately 100mm.
Refer to Figure 3-6.
If not, then slacken the four screws securing the heat pump
to the AV mounts and adjust its position to achieve approx.
100mm. Then ensure that the four screws are re-tightened to
secure the heat pump to the AV mounts.
Figure 3-6: Distance between heat pump and volumiser
(HPID13R32 shown)
3.7 SYSTEM CONNECTIONS
The Grant External Volumiser is designed to be installed in the
ow from the heat pump. It must not be installed in the return from
the system. Refer to Figure 3-7.
Figure 3-7: Typical diagram showing position and connection of
external volumiser
Table 3-1: Key to Figure 3-7
Item Description
1 Aerona³ ASHP (HPID10R32 shown)
2 Flexible hose
3 Isolation valve
4Grant external volumiser
5 Anti-vibration mounts
Upward facing
flanges
3
23
1
4
Item Description
1 Aerona³ ASHP (HPID10R32 shown)
2 Flexible hose
3 Isolation valve
4 Grant External Volumiser
5 Anti-Vibration Mounts
2
5

Page 8 Section 3: Installation
The Grant External Volumiser is supplied with two connections –
one inlet and one outlet. Refer to Figure 2-1.
Each connection is identied on the volumiser casing with an
arrow to indicate which is the inlet and outlet. These connections
are 28mm compression.
GENERAL
In all cases the FLOW connection on the back of the heat pump
is connected to the INLET connection on the top of the external
volumiser, via one of the two exible hoses supplied with the heat
pump.
The OUTLET connection on the top of the external volumiser is
connected to the ow pipe of the heating system.
One of the two isolating valves, supplied with the heat pump,
should be tted externally, in the system ow pipe. Refer to Figure
3-7.
The heating system return pipe is connected to the RETURN
connection on the back of the heat pump via the second of the
two exible hoses supplied with the heat pump.
The second of the two isolating valves, supplied with the heat
pump, should be tted externally in the system return pipe. Refer
to Figure 3-7.
The actual means of connection between the heat pump, the
external volumiser and the system is slightly di󰀨erent, depending
on which size of heat pump the volumiser is connected to.
Refer to the following details for the model of heat pump being
tted:
3.7.1 AERONA³ HPID6R32 HEAT PUMP
As the INLET on the top of the external volumiser is higher than
the ow connection on the back of the HPID6R32 heat pump, an
elbow with an integral manual vent must be tted to the volumiser
inlet to allow the volumiser to be vented of any air. Refer to
Figure 3-8 for the connection arrangement.
For details of the pipe and ttings required to make the connection
between the heat pump and external volumiser refer to Figure
3-9.
Return from system
Flow to system
Figure 3-8: External volumiser connection to HPID6R32 heat
pump
1
2
3
4
5
6
7
8
9
10
73
Figure 3-9: External volumiser connection to HPID6R32 heat
pump (exploded image)
Table 3-2: Key to Figure 3-9
Item Description Source
1 External volumiser N/A
2Volumiser inlet connection -
28mm compression
Supplied on
Volumiser
3Compression reducing set -
28mm x 22mm
Supplied with heat
pump
4Copper pipe 22mm - length to suit Supplied by installer
5Elbow c/w manual air vent -
22mm compression
Supplied with heat
pump
6 Copper pipe 22mm - length to suit Supplied by installer
7Flexible hose -
¾” BSP x 22mm c/w washer
Supplied with heat
pump
8 Heat pump ow connection - ¾” BSP N/A
9Volumiser outlet connection -
28mm compression
Supplied on
Volumiser
10 Heat pump return connection -
¾” BSP N/A

Section 3: Installation Page 9
3.7.2 AERONA³ HPID10R32 HEAT PUMP
Refer to Figure 3-10 for the connection arrangement between the
external volumiser and an HPID10R32 heat pump.
For details of the pipe and ttings required to make the connection
between the heat pump and external volumiser refer to Figure
3-11.
Return from system
Flow to system
Figure 3-10: External volumiser connection to HPID10R32 heat
pump
1
2
3
4
5
6
7
8
6
9
Figure 3-11: External volumiser connection to HPID10R32 heat
pump (exploded image)
Table 3-3: Key to Figure 3-11
Item Description Source
1 External volumiser N/A
2Volumiser inlet connection -
28mm compression
Supplied on
Volumiser
3 Copper pipe 28mm - length to suit Supplied by installer
4Elbow - 28mm compression Supplied by installer
5 Copper pipe 28mm - length to suit Supplied by installer
6Flexible hose -
1” BSP x 28mm c/w washer
Supplied with heat
pump
7 Heat pump ow connection - 1” BSP N/A
8Volumiser outlet connection -
28mm compression
Supplied on
Volumiser
9Heat pump return connection -
1” BSP N/A

Page 10 Section 3: Installation
1
2
3
4
5
6
7
8
9
10
7
6
Table 3-4: Key to Figure 3-13
Item Description Source
1 External volumiser N/A
2Volumiser inlet connection -
28mm compression
Supplied on
Volumiser
3 Copper pipe 28mm - length to suit Supplied by installer
4Elbow - 28mm compression Supplied by installer
5 Copper pipe 28mm - length to suit Supplied by installer
6Flexible hose -
1” BSP x 28mm c/w washer
Supplied with heat
pump
71” nipple and 1¼” BSP x 1” BSP
reducing socket
Supplied with heat
pump
8 Heat pump ow connection - 1¼” BSP N/A
9Volumiser outlet connection -
28mm compression
Supplied on
Volumiser
10 Heat pump return connection - 1¼” BSP N/A
Figure 3-13: External volumiser connection to HPID13R32 and
HPID17R32 heat pumps (exploded image)
3.7.3 AERONA³ HPID13R32 AND HPID17R32
HEAT PUMPS
Refer to Figure 3-12 for the connection arrangement between the
external volumiser and an HPID13R32 or HPID17R32 heat pump.
For details of the pipe and ttings required to make the connection
between the heat pump and external volumiser refer to Figure
3-13.
Return from system
Flow to system
Figure 3-12: External volumiser connection to HPID13R32 and
HPID17R32 heat pumps

Section 4: Electrical Page 11
4 ELECTRICAL
! WARNING !
Electric shock may cause serious personal injury or death.
All electrical work must be undertaken by a competent person and
in accordance with the current edition of BS7671 (the I.E.T. Wiring
Regulations), including any amendments. Failure to observe this
legislation could result in an unsafe installation and will invalidate
all guarantees.
The equipment supplied must be wired according to these
Installation Instructions to ensure that the heat pump and
supplementary immersion heater function safely. All electrical
connections made on-site are solely the responsibility of the
installer.
4.1 GENERAL
If the supplementary immersion heater tted to the Grant External
Volumiser is to be used, the immersion heater requires a 230V
50Hz single phase electrical supply. This will be taken from the
230V supply to the Aerona³ heat pump. Refer to Section 4.2 –
Electrical connections below.
In order for the supplementary immersion heater to be controlled
by the Aerona³ heat pump, the External Volumiser will also need
to be connected to the heat pump terminal PCB. Refer to Section
4.2 – Electrical connections below.
4.2 ELECTRICAL CONNECTIONS
! WARNING !
Ensure that all electrical supplies to the heat pump
and external volumiser are isolated before making any
electrical connections.
The supplementary immersion heater tted in the external
volumiser is supplied pre-wired from the factory. Refer to Section
4.3 – Immersion Heater for further details.
4.2.1 IMMERSION HEATER POWER SUPPLY
The supplementary immersion heater uses a dedicated power
supply from a correctly sized circuit breaker in the consumer unit.
The nal supply connection must be made from a weatherproof
lockable isolator located outside the building. Refer to Figure 4-1.
To connect this power supply to the electrical terminals in the
external volumiser, proceed as follows:
1. Remove the access cover from the external volumiser. To do
this unscrew and remove the two screws at the bottom of the
cover and remove the cover.
2. If not already tted, insert the two cable glands supplied
into the two semi-pierced knockouts on the front face of the
volumiser casing and secure from the inside with the back
nuts.
3. Feed the immersion heater supply cable through the larger of
the two cable glands and connect it to the external volumiser
electrical terminals as follows:
• Live to Terminal L (Brown terminal block)
• Neutral to Terminal N (Blue terminal block)
• Earth to Terminal (Green terminal block)
Refer to Figure 4-2 for external volumiser connection
diagram.
4. Tighten the cable gland to securely grip the cable
! NOTE !
The cable glands supplied with the External Volumiser
have been selected for use with the following cable sized:
• 3 x 0.75mm² cable for the smaller M16 cable gland
• 3 x 1.5mm² cable for the larger M20 cable gland
As these glands are required to securely clamp the cable
and prevent it from being pulled out, they MUST only be
used with the correct cable size, as above.
If cables of a di󰀨erent size to that specied above are used, then
it is the responsibility of the installer to provide the correctly sized
cable glands to ensure the cables are securely clamped once
installed.
Figure 4-1: Electrical power supply for External Volumiser

Page 12 Section 4: Electrical
Figure 4-2: Connection diagram for External Volumiser
4.2.2 SUPPLEMENTARY HEATER CONTROL
WIRING
The operation of the backup immersion heater is controlled by the
Grant Aerona³ heat pump.
The 230V output from the ‘Electric heater’ terminal (terminals 46
and N) on the Aerona³ Terminal PCB is connected to the external
volumiser electrical terminals as follows:
• Terminal 46 on heat pump terminal PCB to Terminal L (A2 on
the backup heater relay)
• Terminal N on heat pump Terminal PCB to Terminal N (A1 on
the backup heater relay)
Refer to Figure 4-2 for external volumiser connection diagram
4.3 IMMERSION HEATER
The Grant External Volumiser is supplied factory-tted with a pre-
wired 3kW Cotherm Type TSR immersion heater.
! WARNING !
The immersion heater must NOT be used unless it is fully
immersed in water. Always ensure that the volumiser is full
of water BEFORE switching on the electrical supply.
The immersion heater control thermostat is pre-set on position 4
at a temperature of approximately 65°C. This can be adjusted as
required. Refer to Figure 4-3.
= Earth (Green/Yellow)
= Live (Brown)
= Neutral (Blue)
Temperature
control dial
Reset
Figure 4-3: Immersion heater wiring connections
The wiring connections are also shown in Figure 4-3. Follow
the wiring instructions connecting the live, neutral and earth as
indicated.

Section 4: Electrical Page 13
OVER-TEMPERATURE CUT-OUT
This immersion heater is tted with a Cotherm type TSR
thermostat that incorporates an independent non-self-
resetting over-temperature cut-out to prevent excessive water
temperatures.
The reset pin is located in a small opening to the side of the
control dial and indicated by small triangle with the word ‘safety’.
Refer to Figure 4-3.
In normal operation the reset pin will be approximately 2-3mm
below the surface of the plastic thermostat housing.
Should the over-temperature cut-out operate, the reset pin will be
pushed up to become level or slightly above the surface of the
housing.
To reset the over-temperature cut-out:
• Isolate the volumiser / immersion element from the mains
electrical supply.
• Wait for the temperature in the volumiser to fall su󰀩ciently.
• Using a suitably sized implement, push the reset pin using
hand pressure only to return it to its normal operating
position.
! WARNING !
Ensure the volumiser / immersion heater is isolated from
the mains before attempting to reset to
over-temperature cut-out.
If the immersion heater needs to be replaced it must be tted to
the volumiser using the gasket provided on the unit. Only use a
correctly shaped spanner. Stilsons or pipe grips should NOT be
used. The use of sealing compound is not recommended.
! WARNING !
Always ensure that the immersion heater cap is not
covered.

Page 14 Section 5: Operation
5 OPERATION
5.1 GENERAL
Before starting to commission the installation, including the
Aerona³ air source heat pump, installation of the External
Volumiser must be completed as detailed in Sections 3 and 4 of
these instructions.
! NOTE !
In order to commission the installation, the following
information must be used in conjunction with the Aerona³
installation instructions supplied with the heat pump.
5.2 AERONA³ HEAT PUMP PARAMETER
SETTINGS
Switch on the power to the heat pump, via the external isolator.
Press and hold the ON/OFF button on the heat pump remote
controller for three seconds to turn the heat pump on – refer to
Aerona³ installation instructions Section 9.1.
Set the day and time on the heat pump remote controller – refer to
Aerona³ installation instructions Section 9.2
Access the heat pump parameter setting menus via the heat
pump remote controller – refer to Aerona³ installation instructions
Section 9.3
Set the parameters as detailed in the table below.
Table 5-1: Aerona³ heat pump parameter settings for supplementary immersion heater operation
Level Parameter Function description Display and input value
Group Code Default Min. Max. Setting
I46 00
Backup heater type of function
0 = disable
1 = Replacement mode
2 = Emergency mode
3 = Supplementary mode
0 0 3 3
I46 01 Manual water set point 50°C 40 60 55
I46 04 Heater activation delay time 5 mins 0 900 0
I46 05 Integration time for starting heaters 600 0 900 0
I46 13 Outdoor air temp to enable backup
heaters (supplemantary mode) 5.0°C -20.0 +20 5
I46 14 Outdoor air hysteresis to disable
Backup heaters 5.0°C 0.5 10.0 2
I51 46
Terminal 46: DHW electric heater or
Backup heater
0 = DHW electric heater
1 = Backup heater
0 or 1 0 1 1
! NOTE !
Refer to the Aerona³ installation instructions, supplied with
the heat pump, for further details on how to access and
adjust the above heat pump parameters.

Page 15
DECLARATION OF CONFORMITY
This declaration is made under the sole responsibility of the following Manufacturer.
The Manufacturer declares that the following Products conform to the requirements of the UK Legislation and Regulations as detailed
below.
The Technical Construction Files are retained at the following Manufacturer’s location
We: Grant Engineering (UK) Limited
Of: Frankland Road
Blagrove Industrial Estate
Swindon
SN5 8YG
Telephone: [phone]
Fax: [phone]
Email: [email protected]
Website: www.grantuk.com
Product : 30Ltr EXTERNAL VOLUMISER C/W 3KW BACKUP HEATER
Model: HPIDVOL30EXT
In accordance with the following Legislation:
Electrical Equipment (Safety) Regulations 2016
This declaration is only valid when the installation of this unit is carried out in accordance with the instructions supplied with the unit.
Responsible Person: Neil Sawers
Position: Commercial Technical Manager
Signature:
Date: 18th February 2022
Section 6: Declaration of Conformity
6 DECLARATION OF CONFORMITY

You are now the proud owner of a Grant Combined External
Volumiser from Grant Engineering (UK) Limited which has been
designed to give years of reliable, trouble free operation.
Grant Engineering (UK) Limited guarantees the manufacture of
the External Volumiser including all electrical and mechanical
components for a period of twelve months from the date of
installation4, provided that the External Volumiser has been
installed in full accordance with the installation instructions issued.
This will be extended to a total period of two years if the External
Volumiser is registered with Grant Engineering (UK) Limited within
thirty days of installation and it is inspected when the heat
source/heating system is serviced at twelve month intervals3. See
main Terms and Conditions below.
Registering the product with Grant Engineering (UK) Limited
Please register your Grant Combined External Volumiser with
Grant Engineering UK Limited within thirty days of installation.
To do so visit:
www.grantuk.com/support/product-registration
You can register your External Volumiser for a further twelve
months guarantee (giving two years from the date of
installation4). This does not a󰀨ect your statutory rights1.
If a fault or defect occurs within the manufacturer’s
guarantee period
If your External Volumiser should fail within the guarantee period,
you must contact Grant Engineering (UK) Limited who will arrange
for the repair under the terms of the guarantee, providing that the
External Volumiser has been correctly installed, commissioned
and inspected when the heat source/heating system is serviced
(if the product has been installed for more than twelve months) by
a competent person and the fault is not due to tampering, debris,
system water contamination, misuse, trapped air or the failure of
any external components not supplied by Grant Engineering (UK)
Limited, e.g. circulating pump, motorised valve, etc.
This two year guarantee only applies if the External
Volumiser is registered with Grant Engineering (UK) Limited
within thirty days of installation4and is inspected after twelve
months3, when the heat source and/or heating system is
serviced.
In the rst instance
Contact your installer or commissioning engineer to ensure
that the fault does not lie with the system components or any
incorrect setting of the system controls that falls outside of the
manufacturer’s guarantee otherwise a service charge could result.
Grant Engineering (UK) Limited will not be liable for any charges
arising from this process.
If a fault covered by the manufacturer’s guarantee is found
Ask your installer to contact Grant Engineering (UK) Limited
Service Department on [phone] who will arrange for
a competent service engineer to rectify the fault.
Remember - before you contact Grant Engineering (UK)
Limited
• Ensure the External Volumiser has been installed,
commissioned and inspected by a competent person in
accordance with the installation instructions.
• Ensure the problem is not being caused by the heating
system or its controls.
Free of charge repairs
During the two year guarantee period no charge for parts or
labour will be made provided that the External Volumiser has
been installed and commissioned correctly in accordance with
the manufacturer’s installation instructions, it was registered with
Grant Engineering (UK) Limited within thirty days of installation4
and, for External Volumisers over twelve months old, details
of inspection when the heat source and/or heating system is
serviced are available3.
The following documents must be made available to Grant
Engineering (UK) Limited on request:
• Proof of purchase
• Commissioning Report Form
• Service documents
• System Design Criteria
Chargeable repairs
A charge may be made (if necessary following testing of parts)
if the breakdown is due to any fault(s) caused by the plumbing
or heating system, e.g. contamination of parts due to system
contamination, sludge, scale, debris or trapped air. Refer to
‘Extent of manufacturer’s guarantee’.
Extent of manufacturer’s guarantee
The manufacturer’s guarantee does NOT cover the following:
• If the External Volumiser has been installed for over two
years.
• If the External Volumiser has not been installed,
commissioned, or inspected by a competent person in
accordance with the installation instructions.
• Instances where the serial number has been removed or
made illegible.
• Fault(s) due to accidental damage, tampering, unauthorised
adjustment, neglect, misuse or operating the External
Volumiser contrary to the manufacturer’s installation
instructions.
• Damage due to external causes such as bad weather
conditions (ood, storms, lightning, frost, snow, or ice), re,
explosion, accident or theft.
• Fault(s) due to incorrectly sized expansion vessel(s),
incorrect vessel charge pressure or inadequate expansion on
the system.
• Fault(s) caused by external electrics and external
components not supplied by Grant Engineering (UK) Limited.
• Product servicing, de-scaling or ushing.
• Checking and replenishing system pressure.
• Electrical cables and plugs, external controls not supplied by
Grant Engineering (UK) Limited.
• Heating system components, such as radiators, pipes,
ttings, pumps and valves not supplied by Grant Engineering
(UK) Limited.
• Instances where the External Volumiser has been un-in-
stalled and re-installed in another location.
• Use of spare parts not authorised by Grant Engineering (UK)
Limited.
• Consumable items including, but not limited to, antifreeze
and biocide inhibitor.
Page 16 Section 7: Guarantee
7 GUARANTEE

Terms of manufacturer’s guarantee
• The Company shall mean Grant Engineering (UK) Limited.
• The External Volumiser must be installed by a competent
person and in full accordance with the relevant Codes of
Practice, Regulations and Legislation in force at the time of
installation.
• The External Volumiser is guaranteed for two years from
the date of installation4, providing that every twelve months
the annual service has been completed3 and the External
Volumiser registered with the Company within thirty days of
installation. Any work undertaken must be authorised by the
Company and carried out by a competent service engineer.
• This guarantee will be invalid if the External Volumiser is not
inspected when the heat source/heating system receives its
annual (every twelve months) service and will then be limited
to twelve months from the date of installation4.
• The External Volumiser is operated correctly, in accordance
with the Installation instructions.
• Grant Engineering (UK) Limited strongly recommends that
a Grant Mag-One in-line magnetic lter/s (or equivalent5)
is tted in the heating system pipework. This should be
installed and regularly serviced in accordance with the lter
manufacturer’s instructions. We reserve the right to ask for
proof of installation – failure to provide this may result in the
guarantee becoming invalid.
• Proof is provided that the system has been ushed or
chemically cleaned where appropriate (refer to BS 7593)
and that the required quantity of a suitable corrosion inhibitor
added.
• Proof of annual servicing (including the checking of any
expansion vessels and pressure relief valves) must be
provided if and when requested by the Company.
• This guarantee does not cover breakdowns caused by
incorrect installation, neglect, misuse, accident or failure
to operate the External Volumiser in accordance with the
manufacturer’s installation instructions.
• The External Volumiser is registered with the Company within
thirty days of installation. Failure to do so does not a󰀨ect your
statutory rights1.
• The balance of the guarantee is transferable providing the
installation is serviced prior to the dwelling’s new owners
taking up residence. Grant Engineering (UK) Limited must be
informed of the new owner’s details.
• The Company will endeavour to provide prompt service in
the unlikely event of a problem occurring, but cannot be held
responsible for any consequences of delay however caused.
• This guarantee applies to Grant Engineering (UK) Limited
External Volumisers purchased and installed on the UK
mainland, Isle of Wight, Channel Islands and Scottish Isles
only2. Provision of in-guarantee cover elsewhere in the UK is
subject to agreement with the Company.
• All claims under this guarantee must be made to the
Company prior to any work being undertaken. Invoices for
call out/repair work by any third party will not be accepted
unless previously authorised by the Company.
• Proof of purchase and date of installation, commissioning
and service documents must be provided on request.
• If a replacement External Volumiser is supplied under
the guarantee (due to a manufacturing fault) the product
guarantee continues from the installation date of the original
External Volumiser and not from the installation date of the
replacement4.
• The External Volumiser must be connected to a mains water
supply (installations utilising a private water supply are not
covered by this guarantee).
• Breakdown/failure due to lime scale will not be covered by
this guarantee.
• The replacement of a External Volumiser under this
guarantee does not include any consequential costs.
• The External Volumiser must not be sited in a location where
it may be subjected to frost.
Foot notes
1. Your statutory rights entitle you to a one year guarantee
period only.
2. The UK mainland consists of England, Scotland and
Wales only. Please note that for the purposes of this
denition, Northern Ireland, Isle of Man and Scilly Isles
are not considered part of the UK mainland.
3. We recommend that your heating system is serviced every
twelve months, and that your External Volumiser is inspected
at the same time (even when the guarantee has expired) to
prolong the lifespan and ensure it is operating safely and
e󰀩ciently.
4. The guarantee period will commence from the date of
installation, unless the installation date is more than six
months from the date of purchase, in which case the
guarantee period will commence six months from the date of
purchase.
5. As measured by gauss. The MagOne magnetic lter has a
gauss measurement of 12,000.
Version 1.0 – September 2022
Section 7: Guarantee Page 17

Page 18 Notes
NOTES

Notes Page 19
NOTES

GRANT ENGINEERING (UK) LIMITED
Frankland Road, Blagrove Industrial Estate, Swindon, SN5 8YG
Tel: [phone] Fax: [phone]
Email: [email protected] www.grantuk.com