GRANT QR Range Indirect Heat Pump Cylinder Instruction Manual
- June 9, 2024
- GRANT
Table of Contents
QR Range Indirect Heat Pump Cylinder
Grant QR Range
Indirect Heat Pump Cylinder Installation, Servicing and User Instructions
UK | DOC 0179 | Rev 1.3 | January 2023
IMPORTANT NOTE FOR INSTALLERS
These instructions are intended to guide Installers on the installation,
commissioning and servicing of a Grant Quick Recovery indirect heat pump
cylinder. After installing the cylinder, leave these instructions with the
user. User instructions to guide users in the operation of the cylinder are in
Section 12 of these instructions.
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.
PRODUCT CODES COVERED
Grant QR Single Coil Heat Pump Cylinder Model 150 litre 180 litre 210 litre 250 litre 300 litre
Product Code
QRSC150 QRSC180 QRSC210 QRSC250 QRSC300
Grant Slimline QR Single Coil Heat Pump Cylinder Model 150 litre 180 litre 210 litre
Product Code
QRSC150SL QRSC180SL QRSC210SL
Grant QR Twin Coil Heat Pump Cylinder Model 210 litre 250 litre 300 litre
Product Code
QRTC210 QRTC250 QRTC300
SERVICING
The cylinder should be serviced at least every twelve months and the details
entered in the Service Log in Appendix A at the back of these instructions.
GRANT ENGINEERING (UK) LIMITED
Frankland Road, Blagrove Industrial Estate, Swindon, SN5 8YG Tel: +44 (0)1380
736920 Fax: +44 (0)1380 736991 Email: info@grantuk.com www.grantuk.com
This manual is accurate at the date of printing but will be superseded and
should be disregarded if specifications 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 official 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.
CONTENTS
1
INTRODUCTION
4
1.1
Installation requirements
4
1.2
Water supply requirements
4
1.3
Location
4
1.4
Storage and handling
4
1.5
About your cylinder
4
1.6
Open vented hot water systems
4
1.7
Primary circuit pipework
4
connections
1.8
Secondary circuit pipework
5
connections
1.9
Taps and fittings
5
1.10 Hard water scaling
5
1.11 Insulation
5
1.12 Health and Safety
5
2
TECHNICAL DATA
6
2.1
Cylinder technical data
6
2.2
Product contents
8
2.3
Dimensions
9
2.4
Connections and Controls
12
2.5
Optional plinth dimensions
13
3
PRIMARY CIRCUIT INSTALLATION
14
3.1
Grant QR indirect heat pump
14
cylinders
3.2
Primary connections
14
3.3
The 2-port valve
14
3.4
Hard water areas
14
3.5
Solar thermal system schematics 15
4
SECONDARY CIRCUIT INSTALLATION 16
4.1
General
16
4.2
Cold Water Inlet Manifold
16
4.3
Installation
16
4.4
Expansion Vessel
17
4.5
Temperature and Pressure Relief 17
Valve
4.6
Hot water Supply
17
4.7
Prevention of Scalding
17
4.8
Secondary Return
17
4.9
Tundish
18
4.10 Discharge Pipe
18
4.11 Discharge Pipe Sizing
18
4.12 Worked Example
18
4.13 Discharge Pipe Arrangement
19
5
ELECTRICAL
20
5.1
Immersion Heater
20
5.2
Immersion Heater Wiring Instructions 20
5.3
Immersion Heater Safety Cut-Out 21
5.4
Dual Thermostat
21
5.5
2-Port Valves
21
5.6
Heat pump interface box
21
5.7
Wiring diagrams
22
6
COMMISSIONING, DRAINING DOWN 25
AND SAFETY
6.1
Filling the Cylinder
25
6.2
Draining Down
25
6.3
Immersion Heater Safety Cut-Out 25
6.4
Cold Water Discharge from Tundish 26
6.5
Hot Water Discharge from Tundish 26
6.6
Expansion Vessel
26
6.7
Customer Handover
26
7
MAINTENANCE
27
7.1
Servicing and Maintenance
27
7.2
Inlet Manifold Assembly
27
7.3
Expansion Relief Valve Cartridge 27
7.4
Expansion Vessel
27
8
FAULT FINDING
28
8.1
Intermittent Water Discharge
28
8.2
Constant Water Discharge
28
8.3
No Flow from Hot Water Taps
29
8.4
Cold Water Flow from Hot Water 29
Taps
8.5
Excessive Hot Water from Taps
30
9
SPARE PARTS
31
9.1
Spare Parts
31
10
PRODUCT FICHE
32
11
END OF LIFE INFORMATION
32
12
USER INSTRUCTIONS
33
12.1 User Instructions
33
13
GUARANTEE
34
A
INSTALLATION, COMMISSIONING AND 36
SERVICE RECORD LOG BOOK
Contents
Page 3
1 INTRODUCTION
1.1 INSTALLATION REQUIREMENTS
Thank you for purchasing a Grant unvented hot water storage cylinder from our
QR range.
These Installation and User instructions must be read carefully before you
begin installing the cylinder.
The cylinder must be installed by a competent person in compliance with all
current legislation, codes of practice and local by-laws covering the
installation of an unvented hot water cylinder.
Please also make sure that the installation complies with the information
contained in these Installation and User Instructions.
To prevent damage to the coil/s, cylinder and cylinder connections, make any
soldered joints before connecting pipework to the cylinder.
1.2 WATER SUPPLY REQUIREMENTS
We recommend that your Grant unvented cylinder is installed with an
uninterrupted water supply.
Where possible, the unit should be fed via a Ø22 mm supply pipe. It requires a
supply pressure of at least 1.5 bar with a flow rate of at least 25 litres per
minute as a minimum for it to function.
Even with this pressure and flow rate, the flow from the outlets will be
disappointing if several outlets are used simultaneously. Generally speaking,
the higher the supply pressure, the better the system will function.
The cylinder control equipment is factory set to limit the incoming system
operating pressure to 3 bar. The maximum supply pressure into the pressure
reducing valve (PRV) is 12 bar.
1.3 LOCATION
The unit is designed to be floor standing, vertically mounted, internally in a
frost-free environment. When choosing a suitable location for the cylinder,
consideration should be given to the routing of the discharge pipe to a
convenient point and also the availability of an adequate power supply for
connecting the immersion heater.
The cylinder may stand on any flat and level surface without any special
foundation requirements, provided that it is sufficiently robust to support
the full weight of the cylinder (refer to Section 2.1).
The position of the cylinder should be such that easy access is provided for
servicing the controls and replacing the immersion heater(s) should the need
arise.
Generally, pipe runs should be made as short as possible and lagged to prevent
heat loss.
Should it be required, a plinth for the cylinder is available to purchase from
Grant UK (product code: MB-24) to enable pipework to be run underneath the
cylinder with ease. Refer to Section 2.5 for dimensions.
1.4 STORAGE AND HANDLING
If the cylinder is not being installed immediately, it should remain in its
carton to prevent damage. We recommend that the cylinder be transported to its
installation position on a sack truck or similar whilst still within the
carton.
! CAUTION !
1.5 ABOUT YOUR CYLINDER
Grant QR indirect heat pump cylinders have either:
· A single indirect coil designed for connection to an air source heat pump,
such as the Grant Aerona³ range. If another heat source, such as a boiler or
another make of heat pump is to be connected, please refer to the
manufacturer’s installation instructions for more information.
· Two indirect coils, one designed for connection to an air source heat pump,
such as the Grant Aerona³ range; and another for connection of a solar thermal
system, such as one using the Grant Sahara range of solar collectors.
The heat pump coil may need to be connected using a 2-port motorised valve
(refer to Section 3.3 for further details). This valve is supplied loose with
all Grant QR indirect heat pump cylinders.
For twin coil models, the solar coil may need to be connected using a high
temperature 2-port or solenoid valve to shut off the flow from the primary
source and electronically interlocked with the heat source via the cylinder
control and high limit thermostat. Refer to Sections 3.3.3 and 3.5 for further
details.
Failure to fit this 2-port valve in a system layout where it is required
(refer to Section 3.3 for further details) will invalidate all guarantees and
will be in breach of the Building Regulations Approved Document G3 (2010).
More information on electrical wiring is given in Section 5 of these
instructions.
Grant QR cylinders are factory-fitted with a temperature and pressure relief
(T&P) valve and a 3kW electric immersion heater
Refer to Figures 2-4 and 2-5 and the corresponding table for the T&P valve
position.
Refer to Sections 5, 6 and 12 for further details on immersion heaters.
1.6 OPEN VENTED HOT WATER SYSTEMS
If required, your Grant QR indirect heat pump cylinder can be used as part of
an open vented hot water system, i.e. fed from a cold water storage cistern
and fitted with an open vent pipe, provided the maximum head does not exceed
30 metres.
When used in this way, it will not be necessary to install the expansion
vessel and cold water inlet manifold supplied with the cylinder.
! NOTE !
The temperature and pressure relief (T&P) valve must be left connected to the
cylinder (as supplied).
As it may still operate due to temperature, the temperature and pressure
relief (T&P) valve should be connected in the correct manner – refer to
guidance given in Section 4 of these instructions.
1.7 PRIMARY CIRCUIT PIPEWORK CONNECTIONS
All primary circuit pipework connections to the cylinder MUST be made in
accordance with Figures 2-4 and 2-5 as appropriate. Refer to Section 3
(Primary Circuit Installation) for further details.
Do not use the Temperature and Pressure relief valve (T&P relief valve) as a handle when moving and positioning the cylinder.
Page 4
Section 1: Introduction
1.8 SECONDARY CIRCUIT PIPEWORK CONNECTIONS
All secondary circuit primary pipework connections to the cylinder MUST be
made in accordance with Figures 2-4 and 2-5 as appropriate. Refer to Section 4
(Secondary Circuit Installation).
1.9 TAPS AND FITTINGS
All taps and fittings incorporated in the unvented hot water system should
have a rated operating pressure of 7 bar or above.
The compression nuts and olives required to make all necessary pipework
connections to the cylinder are supplied loose in the accessories pack
provided with the cylinder.
1.10 HARD WATER SCALING
If the cylinder is used in a hard water area scaling will form inside the
cylinder and this will reduce both the performance and working life of the
cylinder.
Where the total hardness exceeds 125 ppm a high capacity water softener, or
suitable water conditioner, should be installed in the incoming cold water
supply to the cylinder.
The cylinder immersion heater control thermostat has been factory-set to
around 65°C. Please refer to Section 5.1 for further information on the
immersion heater/s supplied. The water temperature control thermostats (on the
immersion heaters and dual thermostats) fitted to the cylinder should be set
no higher than 65°C, however this could be decreased to be between 50°C and
55°C depending on the end user’s requirements.
Setting a lower target temperature will help to minimise the buildup of lime
scale and is likely to increase the longevity of the hot water cylinder.
1.11 INSULATION
All Grant QR indirect heat pump cylinders are insulated with a 50mm layer of
CFC/HCFC free, fire retardant, polyurethane foam injected between the
stainless steel cylinder and the outer casing. This polyurethane foam has a
Global Warming Potential (GWP) of 3.1 and an Ozone Depletion Potential (ODP)
of 0.
1.12 HEALTH AND SAFETY
The information supplied in Tables 2-2 to 2-4 will help you assess the safest
way to manoeuvre your cylinder into position.
Please use the correct table to find the empty weight of your cylinder and
then consider how you can safely move it into its final position.
Please leave these Installation and User Instructions with the householder
after installation.
Section 1: Introduction
Page 5
2 TECHNICAL DATA
2.1 CYLINDER TECHNICAL DATA
Table 2-1: Cylinder technical data (All models)
Secondary return connection (mm) Cold feed / hot draw-off connections (mm)
Primary coil connections (mm) Maximum water supply pressure (bar) System
operating pressure – pre-set (bar) Expansion vessel charge pressure (bar)
Expansion relief valve pressure (bar) T&P relief valve lift pressure (bar) T&P
relief valve lift temperature (°C) Maximum primary circuit working pressure
(bar)
2.1.1 SINGLE COIL MODELS
Table 2-2: Cylinder technical data (QRSC models)
Nominal capacity (litres) Actual capacity (litres) Overall diameter (mm)
Overall height (mm) Weight – empty (kg) Weight – full (kg) Primary coil length
(m) Primary coil surface area (m²) Primary coil pipe diameter (mm)
Performance: Primary coil rating (kW) Standing heat loss (kWh/24hrs) ERP
rating Test carried out at 60°C.
Grant QR Indirect Cylinders 22 22 22 12 3 3 6 7 90 3.5
150 litre 150 136 550 1117 45 181 26 2.3 28
32.0 1.41
C
Grant QR Single Coil Indirect HP Cylinders
180 litre
210 litre
250 litre
180
210
250
167
197
237
550
550
550
1305
1491
1744
50
54
62
217
251
299
26
26
26
2.3
2.3
2.3
28
28
28
32.0
32.0
32.0
1.61
1.79
2.02
C
C
C
300 litre 300 289 550 2054 68 357 26 2.3 28
34.0 2.24
C
Table 2-3: Cylinder technical data (QRSCSL models)
Nominal capacity (litres) Actual Capacity Overall diameter (mm) Overall height
(mm) Weight – empty (kg) Weight – full (kg) Primary coil length (m) Primary
coil surface area (m²) Primary coil pipe diameter (mm) Performance: Primary
coil rating (kW) Standing heat loss (kWh/24hrs) ERP rating Test carried out
at 60°C.
Grant QR Slimline Single Coil Indirect HP Cylinders
150 litre
180 litre
210 litre
150
180
210
141
171
201
478
478
478
1458
1708
2021
39
43
50
180
214
251
24
24
24
1.7
1.7
1.7
22
22
22
30.0
30.0
30.0
1.58
1.72
2.08
C
C
C
Page 6
Section 2: Technical Data
2.1.2 TWIN COIL MODELS
Table 2-4: Cylinder technical data (QRTC models)
Nominal capacity (litres) Actual capacity (litres) Overall diameter (mm)
Overall height (mm) Weight – empty (kg) Weight – full (kg) Top coil length (m)
Top coil surface area (m²) Top coil pipe diameter (mm) Bottom (solar) coil
length (m) Bottom (solar) coil surface area (m²) Bottom coil pipe diameter
(mm) Dedicated solar volume – Vs (litres) Performance: Top coil rating (kW)
Bottom (solar) coil rating (kW) Standing heat loss (KWh/24hrs) ERP rating
Test carried out at 60°C.
210 litre 210 192 550 1490 59 251 26 2.3 28 12.5 0.86 22 92
Grant QR Twin Coil Indirect HP Cylinders 250 litre 250 233 550 1741 65 298 26 2.3 28 12.5 0.86 22 120
300 litre 300 284 550 2054 77 361 26 2.3 28 12.5 0.86 22 120
32.0
32.0
34.0
19.7
20.7
22.1
1.79
2.02
2.24
C
C
C
Section 2: Technical Data
Page 7
2.2 PRODUCT CONTENTS 2.2.1 SINGLE COIL MODELS
Table 2-5: Product contents (QRSC and QRSCSL models)
Cylinder assembly Expansion vessel – 18 litre Expansion vessel – 24 litre ½ temperature and PRV – 7 bar/90°C Tundish – 15/22 mm 22mm compression nut and olive 3/4″ BSPM x 22mm compression adapter Drain cock – ½ end feed Inlet manifold – 3 bar PRV and 6 bar expansion relief valve 2-port motorised valve – 22 mm Dual thermostat (control: 25-65°C / high limit: 90°C) Immersion heater – 3kW 1¾ boss * QRSC and QRSCSL models Factory fitted
150 litre* 1 1 1 1 5 1 1 1 1 1 1
Grant QR Single Coil indirect HP Cylinders
180 litre*
210 litre*
250 litre
1
1
1
1
1
1
–
–
–
1
1
1
1
1
1
5
5
5
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
300 litre 1 1 1 1 5 1 1 1 1 1 1
2.2.2 TWIN COIL MODELS
Table 2-6: Product contents (QRTC models)
Cylinder assembly Expansion vessel – 18 litre Expansion vessel – 24 litre ½
temperature and PRV – 7 bar/90°C Tundish – 15/22 mm 22mm compression nut and
olive 3/4″ BSPM x 22mm compression adapter Drain cock – ½ end feed Inlet
manifold – 3 bar PRV and 6 bar expansion relief valve 2-port motorised valve –
22 mm Dual thermostat (control: 25-65°C / high limit: 90°C) Immersion heater –
3kW 1¾ boss Factory fitted
210 litre 1 1 1 1 7 1 1 1 1 2 1
Grant QR Twin Coil indirect HP Cylinders 250 litre 1 1 1 1 7 1 1 1 1 2 1
300 litre 1 1 1 1 7 1 1 1 1 2 1
Page 8
Section 2: Technical Data
D C B A *
680 650 553
2.3 DIMENSIONS
Dia
DRY STAT POCKET 20mm
HW DRAW OFF 22mm
DRY STAT POCKET 20mm
PTRV 1/2″ NPT 7 BAR 90 C
SECONDARY RETURN 22mm (FOR 210L & ABOVE)
3kW IMMERSION 230/240V 50HZ
COLD FEED 22mm
FLOW / RETURN CONNECTIONS 22mm
Figure 2-1: Grant QR single coil heat pump cylinder dimensions
Table 2-7: Grant QR single coil heat pump cylinder dimensions
Dimensions (mm)
150 litre
180 litre
A*
–
–
B
893
1081
C
1091
1279
D
1117
1305
Dia
550
550
- Secondary return on 210, 250 and 300 litre models ONLY
210 litre 1150 1269 1467 1491 550
250 litre 1400 1519 1717 1744 550
300 litre 1600 1832 2030 2054 550
Section 2: Technical Data
Page 9
Dia
HW DRAW OFF
22mm
DRY STAT POCKET 20mm
PTRV 1/2″ NPT 7 BAR 90°C
SECONDARY RETURN 22mm (FOR 210L & ABOVE)
3kW IMMERSION 230/240V 50HZ
COLD FEED 22mm
FLOW / RETURN CONNECTIONS 22mm
C B A* 809 769 739 664
Figure 2-2: Grant Slimline QR single coil heat pump cylinder dimensions
Table 2-8: Grant Slimline QR single coil heat pump cylinder dimensions
Dimensions (mm)
150 litre
A*
–
B
1228
C
1458
Dia
478
- Secondary return on 210 litre model ONLY
180 litre –
1478 1708 478
210 litre 1494 1791 2021 478
Page 10
Section 2: Technical Data
Dia
HW DRAW OFF
22mm
SOLAR STAT POCKETS (EAST & WEST SYSTEMS)
PTRV 1/2″ NPT 7 BAR 90°C
D C
B A
1052 978
SECONDARY RETURN 22mm STAT POCKET
ASHP FLOW / RETURN CONNECTIONS 22mm
STAT POCKET
COLD FEED 22mm
465 423 368
3kW IMMERSION 230/240V 50Hz
SOLAR THERMAL FLOW / RETURN CONNECTIONS 22mm
Figure 2-3: Grant QR twin coil heat pump cylinder dimensions
Table 2-9: Grant QR twin coil heat pump cylinder dimensions
Dimensions (mm)
210 litre
A
1150
B
1267
C
1467
D
1490
Dia
550
250 litre 1401 1518 1717 1741 550
300 litre 1601 1831 2030 2054 550
Section 2: Technical Data
Page 11
2.4 CONNECTIONS AND CONTROLS
10 11
9
12
13
14
7
8
6 15
16
18
5
3
4
17
1
2
9
21 22 8
6
7
4
1
2
10
11
12 13
14
16 18
5
3
17
19
20
Figure 2-4: Grant QRSC and QRSCSL cylinders
Figure 2-5: Grant QRTC cylinders
Table 2-10: Grant QR indirect heat pump cylinder connections and controls (key to Figures 2-4 and 2-5)
Item
Description
Connection Size Item
Description
Connection size
1
Heat pump flow tapping
22mm compression 12
2
Heat pump return tapping
22mm compression 13*
3
Stat pocket
20mm diameter
14*
4
Immersion heater c/w control & limit thermostat (factory fitted)
1 ¾” BSPF
15
5
Cold water inlet
22mm compression 16
6
Secondary return (210, 250 and 300L models only)
22mm compression
17
7
Stat pocket
20mm diameter
18
8
T&P valve connection
1/2″ BSPF
19
9
HW outlet
22mm compression 20
10
CW supply to inlet manifold 22mm compression 21
11 Pressure reducing valve – 3 bar
–
22
- Pipework between items 13 and 14 NOT supplied with cylinder.
Balanced cold supply connection
Expansion relief valve – 6 bar
Temperature & Pressure relief valve – 90°C / 7 bar
22mm compression 15mm compression 15mm compression
Tundish
15/22mm compression
Discharge pipe (not supplied with cylinder)
–
Drain cock (supplied with cylinder)
–
Mains water supply pipe (not supplied with cylinder)
Solar thermal flow tapping
Solar thermal return tapping
Sensor pocket (East/West systems)
Sensor pocket (East/West systems)
22mm compression 22mm compression
–
Page 12
Section 2: Technical Data
2.5 OPTIONAL PLINTH DIMENSIONS
Figure 2-6: Grant QR Cylinder Plinth (product code: MB-24)
R 275 422
416
100
Figure 2-7: Grant QR Cylinder Plinth dimensions
Section 2: Technical Data
Page 13
3 PRIMARY CIRCUIT INSTALLATION
3.1 GRANT QR INDIRECT HEAT PUMP CYLINDERS
Grant QR indirect heat pump cylinders are specifically designed for connection
to most fully pumped Air Source Heat Pump systems (such as the Grant Aerona³
Heat Pump range) – either open vented or sealed systems having a maximum
working pressure of 3.5 bar and a maximum working temperature of 90ºC. If you
are in any doubt over the suitability of an Air Source Heat Pump (other than a
Grant Aerona³ heat pump) for use with the cylinder, consult the heat pump
manufacturer.
! WARNING !
Solid fuel or wood burning boilers and gravity circulation systems must not be
used on the primary circuit of an unvented hot water system.
12
Indirect heat pump coil
3.2 PRIMARY CONNECTIONS
1. The primary flow and return connections from the heat pump should be made
to the flow and return connections of the cylinder. Refer to Figures 2-1 to
2-5, as appropriate.
The 2-Port motorised valve (supplied) may need to be fitted into the primary
flow to the indirect coil. Refer to Section 3.3 for further information.
If a Grant QRTC cylinder is being installed, the flow and return connections
from the solar thermal installation should be made to the lower coil
connections. Refer to Figures 2-3 and 2-5.
For all Grant QR cylinders:
· The primary flow and return fittings are 22mm compression.
· The valve has 22mm compression connections.
2. Locate the dual thermostat/s in the stainless steel pocket/s (refer to
Figures 2-4 and 2-5, as appropriate, for location) and secure using the
retaining screws on the thermostat housing.
3. Any automatic or manual air vent fitted to vent air from the upper coil
should be installed on the primary flow pipe to the coil.
Figure 3-1: Primary circuit connections
Table 3-1: Key to Figure 3-1
Item Description
1 Automatic Air Vent
2 Motorised 2-port valve
3.3.2 BOILER OR OTHER HIGH TEMPERATURE HEAT SOURCE
If a boiler or other high temperature heat source is being connected to the
indirect coil of the cylinder, the 2-port motorised valve (supplied) MUST be
fitted into the primary flow to the indirect coil of the cylinder,
irrespective of system layout (eg S-Plan, Y-Plan, etc…). This must be done to
comply with Building Regulations Approved Document G3. Please check with the
appliance manufacturer for connection details.
3.3 THE 2-PORT VALVE
The use of the 2-port motorised valve supplied with the cylinder depends on
the type of heat source used with the indirect coil. Refer to Sections 3.3.1
and 3.3.2, as appropriate.
If the cylinder is being connected to a Grant Sahara solar thermal collector,
please refer to Section 3.3.3.
3.3.3 SOLAR THERMAL
For Grant Sahara solar thermal installations using a Grant QR Twin Coil
cylinder, a high temperature rated motorised valve (contact Grant UK for
details) may need to be fitted to the solar thermal system flow pipe to the
cylinder (see item 4, Figure 3-2), and wired in accordance with Figure 5-3 for
a Grant Sahara Solar Collector to comply with current legislation.
3.3.1 ASHP
If an ASHP is being connected to the indirect coil of the cylinder and the
cylinder is being connected to an “S-Plan” type system, then the 2-port
motorised valve (supplied) MUST be fitted into the primary flow to the
indirect coil in order to prevent the temperature of the cylinder contents
being lowered by a space heating demand.
Refer to item 2 in Figure 3-1. The 2-port valve should be wired in accordance
with Figure 5-2 for a Grant Aerona³ Heat Pump to comply with current
legislation. For other makes of heat pump please check with the heat pump
manufacturer for connection details.
If an ASHP is being connected to the indirect coil of the cylinder and the
cylinder is being connected to a “W-Plan” type system using a 3-port diverter
valve (such as a Honeywell V4044C), then the 2-port motorised valve (supplied)
does not need to be fitted into the primary flow to the indirect coil.
! NOTE !
A high temperature rated motorised valve is only required on installations
where the solar thermal collectors are installed below the level of the
indirect solar coil contained in the DHW cylinder.
If the Grant Sahara solar collector is installed above the indirect solar
coil, as shown in Figure 3-3, a high temperature motorised valve DOES NOT need
to be fitted and the system should be wired in accordance with Figure 5-4.
For other makes of solar thermal collector please check with the manufacturer
for details.
3.4 HARD WATER AREAS
If the cylinder is to be used with a boiler, in a hard water area, we
recommend that the primary flow temperature be limited to 75°C. This will help
reduce the migration of suspended solids in the water and help prevent the
build up of lime scale.
Page 14
Section 3: Primary Circuit Installation
3.5 SOLAR THERMAL SYSTEM SCHEMATICS
The following system diagrams (refer to Figures 3-2 and 3-3 below) are only
concept drawings, not detailed engineering drawings, and are not intended to
describe a complete system, nor any particular system. It is the
responsibility of the system designer, not Grant UK, to determine the
necessary components for and configuration of the particular system being
designed including any additional equipment and safety devices to ensure
compliance with building and safety code requirements.
9
10
1
5
2
6
3
7 8
11
4
10
5
2
6
3
7 8 9
1
11
Figure 3-2: Solar thermal system schematic Grant Sahara solar Collector below cylinder coil
Figure 3-3: Solar thermal system schematic Grant Sahara solar Collector above cylinder coil
Table 3-2: Key to Figures 3-2 and 3-3
Item Description
1 Grant Sahara Solar Collector (contact Grant UK for details)
2 Solar Pump Station (contact Grant UK for details)
3 Solar Circulator Pump (contact Grant UK for details)
4
High temperature rated motorised 2-port valve (contact Grant UK for details)
5 Grant GSX1 Solar Controller (contact Grant UK for details)
6 Wiring centre
7 Cylinder bottom sensor
8 Dual thermostat for solar coil (supplied)
9 Solar collector sensor
10 Primary heat source coil
11 Solar coil
Section 3: Primary Circuit Installation
Page 15
4 SECONDARY CIRCUIT INSTALLATION
4.1 GENERAL
Grant QR indirect heat pump cylinders are supplied with the safety devices and
components loose in a kit, with the exception of the Temperature & Pressure
(T&P) relief valve which is factoryfitted. These safety devices and components
MUST be fitted to the cylinder as detailed in the following Sections 4.2 to
4.13. For a list of these safety devices and components refer to either Table
2-5 or 2-6, as appropriate.
For commissioning and maintenance purposes, it is essential to fit a service
valve (not supplied) in the cold water supply pipe, immediately before the
inlet manifold.
The ½ drain cock (supplied in the kit) must be fitted in the cold feed to the
cylinder to provide a means of draining the unit. Refer to Figures 2-4 or 2-5
(as appropriate) for a suitable drain cock position that will enable most of
the cylinder to be drained off when required.
4.2 COLD WATER INLET MANIFOLD
This manifold contains a pressure reducing valve, double check valve and
expansion relief valve with a stainless steel seat.
The pressure reducing valve is factory set to 3 bar. The set pressure is shown
on top of the valve. The maximum inlet pressure to this valve is 12 bar.
A balanced cold water connection is provided on the inlet manifold. Refer to
Figure 4-1. This should only be used to provide balanced cold supplies to
shower valves and mixer taps. If the balanced cold water outlet is not
required, blank off this port.
4.3 INSTALLATION
1. Cold water supply pipe to be 22mm nominal size. 2. Flush supply pipework
before connection to remove all flux
and debris prior to fitting the inlet controls. Failure to do this may result
in irreparable damage to the controls and will invalidate the warranty. 3.
Once the pipework is flushed connect the cold supply to the Inlet manifold.
The manifold can be installed in any position as long as it is installed in
the correct flow direction. Refer to the arrows on the side of the body. Make
sure that the head of the expansion relief valve is offset from the cylinder
for ease of access.
4. The expansion relief valve should be either horizontal or upright – if
fitted inverted, debris may be deposited on the seat and cause fouling of the
seat when the valve operates. Check direction of flow arrows.
5. If the installation requires one, a pressure gauge should be sourced and
fitted on the cold water supply to the cylinder, between the inlet manifold
and the cold water inlet tapping on the cylinder.
6. Connect the expansion vessel directly to the ¾” BSPF connection in the
inlet valve manifold body, after removing the black plastic plug. See Figure
4-1 and Section 4.4.
7. The expansion relief drain pipework must be connected to a safe visible
discharge point via the tundish (supplied in the unvented hot water safety
kit) and the pipework must have a continuous fall.
8. Connect the expansion relief valve outlet into the discharge pipe from the
temperature and pressure Relief valve using a 15mm copper pipe and tee piece
(not supplied). Fit the tundish below this tee piece using a short length of
copper pipe. Refer to Sections 4.9 to 4.13 for further information on the
Tundish and Discharge pipe.
9. The pressure reducing valve has two outlets, the second one is for a
balanced cold water supply, to a shower or a bidet (over rim type only,
ascending spray type requires type AA, AB or AD air gap).
Major shower manufacturers advise fitting a mini expansion vessel in the
balanced cold supply to accommodate thermal expansion and prevent tightening
of shower controls.
If the dwelling has a shower mixing valve (manual or thermostatic) or a Bidet
(over rim type) use the cold water supply from the balanced cold water
connection on the inlet manifold for these outlets.
Do not use the balanced cold connection to supply bath taps as this can reduce
the flow of water available to the cylinder. If the balanced cold water outlet
is not required, blank off the connection.
10. The Service Log at the back of these instructions should be completed
after commissioning of the system.
11. The cylinder must be registered with Grant UK within 30 days of
installation. Refer to Section 13 for further details on the Cylinder
guarantee.
Pressure reducing valve
Expansion relief valve
Cold water supply
Expansion relief
Circlip
Cold inlet to cylinder
Page 16
Balanced cold outlet
¾” BSPF expansion vessel connection.
(Remove black plug prior to connection)
Figure 4-1: Cold water inlet manifold
Section 4: Secondary Circuit Installation
4.4 EXPANSION VESSEL
A suitable expansion vessel with a pre-charge pressure of 3bar is supplied for
fitting to all cylinders. This expansion vessel must be connected into the
cold water supply, between the expansion relief valve (in the inlet manifold)
and the cold water inlet to the cylinder. The preferred method of connection
is to hard pipe the expansion vessel directly to the ¾” BSPF connection in the
inlet valve manifold body using 22mm diameter pipe. Refer to Figure 4-1. To do
this, with the cylinder in its final position and with all primary circuit
connections to the cylinder made: 1. Remove the black plastic plug from the
inlet manifold body
(refer to Figure 4-1). 2. Screw the ¾” BSPM x 22mm compression adapter
(supplied)
into the ¾” BSPF connection in the inlet manifold body. 3. Mount the expansion
vessel in a suitable position on an
adjacent wall to the cylinder using the wall brackets on the vessel.
! NOTE !
The expansion vessel must be positioned with the connection point at the
bottom.
No valve should be fitted between the expansion vessel and the cylinder.
4. Using 22mm diameter pipe and the 22mm compression nut and olive supplied
with the expansion vessel, connect the expansion vessel to the inlet manifold.
The air charge pressure in the expansion vessel must be regularly checked
(e.g. at every service) and topped up as necessary. The correct air charge
pressure is 3.0bar. Refer to Sections 7.1 and 7.4 for further details.
4.5 TEMPERATURE AND PRESSURE RELIEF VALVE
The temperature and pressure relief valve (T&P Valve) is supplied factory
fitted to the cylinder. The T&P valve must not be removed from the cylinder or
tampered with in any way. The valve is pre-set to lift at 7bar or 90°C and any
attempt to adjust it will invalidate the guarantee.
4.6 HOT WATER SUPPLY
Connect the hot water supply pipe to the top outlet of the cylinder. Refer to
Figures 2-1 to 2-3, as appropriate.
4.7 PREVENTION OF SCALDING
Building Regulations Approved Document G (Part G3) requires that the hot water
temperature supplied to a bath should be limited to a maximum of 48°C by using
an in-line blending valve (not supplied with the cylinder) with a maximum
temperature stop. The length of the supply pipe between the blending valve and
the bath hot water outlet should be kept to a minimum to prevent the
colonisation of waterborne pathogens (e.g. legionella). Refer to Approved
Document G for further details.
4.8 SECONDARY RETURN
Grant QR indirect heat pump cylinders with a storage volume of 210 litres and
over are fitted with a secondary return connection. If a secondary return
circuit is required it should be connected to the cylinder as shown in Figure
4-2.
! NOTE !
If a secondary circulation circuit is installed then a larger expansion vessel
may be required to handle the increase in volume.
Balanced cold supply for showers or bidet only (see Section 4.2)
Secondary return line
Circulation pump
Non return valve
Cold inlet
Balanced cold supply outlet
.
Figure 4-2: Secondary return circuit
Section 4: Secondary Circuit Installation
Page 17
4.9 TUNDISH
A suitable tundish is supplied loose with the cylinder for fitting in the
common discharge pipe from the T&P and Expansion relief valves.
The tundish should be vertical, located in the same space as the unvented hot
water cylinder and be fitted as close to, and lower than, the T&P valve with
no more than 600mm of pipe (D1) between the valve outlet and the tundish.
! WARNING !
The tundish must NOT be positioned above or in close proximity of any
electrical current carrying devices or wiring.
A discharge pipe must be fitted to the outlet of the tundish. This must
conform to the requirements as given in Sections 4.10 to 4.13 of these
Installation and User Instructions.
4.10 DISCHARGE PIPE
1. The discharge pipe (D2) from the tundish should terminate in a safe place
where there is no risk to persons in the vicinity of the discharge.
a) It should be made of metal or other material that has been demonstrated to
be capable of withstanding temperatures of the water discharged.
b) Be at least one pipe size larger than the normal outlet size of the safety
device unless its total equivalent hydraulic resistance exceeds that of a
straight pipe 9m long, i.e. for discharge pipes between 9m and 18m long the
equivalent resistance length should be at least two sizes larger than the
normal outlet size of the safety device, between 18m and 27m at least three
sizes larger and so on.
Bends must be taken into account in calculating the flow resistance. Refer to
Sections 4.11, 4.12 and 4.13.
c) Have a vertical section of pipe at least 300 mm long, below the tundish
before any elbows or bends in the pipe work.
d) Be installed with a continuous fall of 1:200 (0.286°).
e) Have discharges visible at both the tundish and the final point of
discharge but where this is not possible or practically difficult there should
be clear visibility at one or other of these locations.
2. Examples of acceptable discharge arrangements are:
a) ideally below a fixed grating and above the water seal in a trapped gully.
b) downward discharges at a low level; i.e. up to 100mm above external
surfaces such as car parks, hard standings, grassed areas etc. are acceptable
providing that where children may play or otherwise come in to contact with
discharges, a wire cage or similar guard is positioned to prevent contact,
whilst maintaining visibility.
c) discharges at high level; e.g. into a metal hopper and metal down pipe with
the end of the discharge pipe clearly visible (tundish visible or not) or onto
a roof capable of withstanding high temperature discharges of water and 3m
from any plastics guttering systems that would collect such discharges
(tundish visible).
3. Where a single pipe serves a number of discharges, such as in blocks of
flats, the number served should be limited to not more than 6 systems so that
any installation can be traced reasonably easily.
The single common discharge pipe should be at least one pipe size larger than
the largest individual discharge pipe to be connected.
If unvented hot water storage systems are installed where discharges from
safety devices may not be apparent i.e. in dwellings occupied by blind, infirm
or disabled people, consideration should be given to the installation of an
electronically operated device to warn when a discharge takes place.
! NOTE !
The discharge will consist of scalding water and steam. Asphalt, roofing felt
and non-metallic rainwater goods may be damaged by such discharges.
4.11 DISCHARGE PIPE SIZING
Refer to Table 4-1 (discharge pipe sizing).
Table 4-1: Discharge pipe sizing
Valve outlet size
Diameter (inches)
Minimum size of
discharge pipe D1 (mm)
Minimum size of
discharge pipe D2 from tundish (mm)
Maximum resistance
allowed, expressed as a length of straight pipe, i.e. no elbows or bends (m)
Resistance created by each elbow or bend (m)
22
Up to 9
0.8
½
15
28
Up to 18
1.0
35
Up to 27
1.4
28
Up to 9
1.0
¾
22
35
Up to 18
1.4
42
Up to 27
1.7
35
Up to 9
1.4
1
28
42
Up to 18
1.7
54
Up to 27
2.3
! NOTE !
The above table is based on copper tube. Plastic pipes may be of a different
bore and resistance. Sizes and maximum lengths of plastic pipe should be
calculated using data for the type of pipe being used.
4.12 WORKED EXAMPLE
The example below is for a 1/2″ diameter temperature relief valve with a
discharge pipe (D2) having 4 x 22mm elbows and a length of 7 m from the
tundish to the point of discharge.
From Table 4-1:
Maximum resistance allowed for a straight length of 22mm copper discharge pipe
(D2) from a 1/2″ diameter temperature relief valve is 9.0m.
Subtract the resistance for quantity of 4 x 22mm elbows at 0.8m each = 3.2m.
Therefore, the maximum permitted length is 9.0 – 3.2 = 5.8m.
5.8m is less than the actual length of 7m; therefore calculate the next
largest size.
Maximum resistance allowed for a straight length of 28mm copper discharge pipe
(D2) from a 1/2″ diameter temperature relief valve is 18m.
Subtract the resistance for a quantity of 4 x 28mm elbows at 1.0m each = 4m.
Therefore, the maximum permitted length is 18 – 4 = 14m.
As the actual length is 7m, a 28mm diameter copper pipe will be satisfactory
in this case.
Page 18
Section 4: Secondary Circuit Installation
4.13 DISCHARGE PIPE ARRANGEMENT
Safety device (e.g. temperature relief valve)
600mm max
Metal discharge pipe from safety device
Tundish
300mm min
Metal discharge pipe from tundish with continuous fall. See table and worked example on previous page
Discharged below fixed grating
Fixed grating
Trapped gully
Figure 4-3: Typical discharge pipe arrangement
Section 4: Secondary Circuit Installation
Page 19
5 ELECTRICAL
All electrical wiring must be carried out by a competent person and in
accordance with the current edition of BS7671 (the I.E.T. Wiring Regulations),
including any amendments.
The control equipment supplied must be wired according to these Installation
and User Instructions to ensure that the cylinder functions safely.
From an economic and convenience point of view, it is intended that these
controls operate in conjunction with other control packages, for example, an
“S-plan” type system that incorporates a programmer, etc.
5.1 IMMERSION HEATER
All Grant QR indirect heat pump cylinders are supplied factoryfitted with one
3kW immersion heater. This immersion heater conforms to EEC Directive 76/889
for radio interference and complies with EN 60335-2-73.
The BEAB approval certification on this immersion heater only applies if a
Thermowatt RTS rod type thermostat is used.
The control thermostat is pre-set on position “· ·” at a temperature of
approximately 65°C. Refer to Figure 5-1. Installation and wiring instructions
for the immersion heater are supplied with each unit. The wiring connections
are also shown in Figure 5-1. Follow the wiring instructions connecting the
live, neutral and earth as indicated.
The immersion heater must be permanently connected to the electrical supply
through a double-pole isolator. A safety cut-out is also incorporated within
the thermostat and is factory set to operate at 75°C. The immersion heater is
factory fitted to the cylinder. If the immersion heater needs to be replaced
it must be fitted to the cylinder 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 !
The immersion heater must NOT be used unless it is fully immersed in water.
Always ensure that the cylinder is full of water BEFORE switching on the
electrical supply.
5.2 IMMERSION HEATER WIRING INSTRUCTIONS
Ensure that the supply voltage corresponds to the voltage rating of the
immersion heater as shown on the rating label on the terminal cover. Each 3kW
230V 50Hz-immersion heater should be wired in accordance with the instructions
given in Figure 5-1. The cable must be routed through the strain relief bush.
The cable grip should be secured using only the screws provided. It should be
wired through a double pole isolator switch or suitable controller, with a
minimum break capacity of 13 amp and contact separation of at least 3mm. Use
85°C heat resistant rubber insulated HOFR sheathed flexible cable, with
minimum cross sectional area of 1.5mm², to comply with BS 6141 table 8 and
must be fully earthed.
! WARNING !
Always ensure that the immersion heater cap is not covered.
Reset button
= Earth (Green/Yellow) = Neutral (Blue) = Live (Brown)
Temperature control dial
Figure 5-1: Immersion heater wiring connections
Refer to Figures 2-1 to 2-3 (as appropriate) for the position of the immersion heater.
! WARNING !
This immersion heater must be earthed.
! WARNING !
The manual reset high limit thermostat must not under any circumstances by by-
passed. This is pre-set to 75°C and to prevent nuisance tripping, the control
thermostat should always be left in position · ·.
Page 20
Section 5: Electrical
5.3 IMMERSION HEATER SAFETY CUT-OUT
The immersion heater incorporates an in independent non selfresetting over
temperature cut-out device to prevent excessive water temperatures.
In normal operation the reset pin positioned to the side of the control knob
and indicated by a triangle (with the words `bipolar safety’ above) will be
approximately 2-3mm below the upper surface of the thermostat cap.
Should the over temperature cut-out operate, the reset pin will be pushed
upwards to become level with or slightly above the cover.
Wait until the temperature has fallen sufficiently. Then Investigate and
identify the cause of the cut-out operation and rectify the fault.
Then manually reset the cut-out by pressing in the reset pin to its normal
operating position using hand pressure only with a suitably sized implement.
! WARNING !
Before removing the immersion heater covers to either reset the safety cut-out
or check/alter the thermostat setting, ensure that the electrical supply is
isolated.
Ensure the cover to the immersion heater cover is replaced correctly and the
retaining nut is fitted. Finally switch the mains electricity supply back on.
5.4 DUAL THERMOSTAT
A Dual Thermostat (a combined control and high limit thermostat) is supplied
separately with the cylinder (two are supplied with QRTC models). The Dual
Thermostat is to be fitted into the sensor pocket in the cylinder (refer to
items 3 and 7 in Figures 2-4 and 2-5, as appropriate, for position) to control
the operation of the heat pump or solar thermal primary coil.
The cylinder control thermostat has an adjustment range between 25°C and 65°C.
It is recommended that it is set between 50°C and 55°C for Grant Aerona³ heat
pump installations. The high limit (overheat) thermostat will automatically
operate at 90°C. For details on the correct wiring connections, refer to
Figures 5-2 to 5-4 (as appropriate).
5.5 2-PORT VALVES
To comply with the regulations governing the installation of indirect unvented
hot water cylinders, a 2-port motorised valve (supplied) may need to be fitted
to the primary flow to the indirect coil of the cylinder.
If your cylinder is being installed as part of an ASHP installation, refer to
Section 3.3.1 for further information.
If your cylinder is being installed as part of a boiler (or other
hightemperature heat source) installation, refer to Section 3.3.2 for further
information.
If a Grant QR Twin Coil indirect heat pump cylinder is being installed with a
solar thermal system, a high temperature 2-port motorised valve may be
required. Refer to Sections 3.3.3 and 3.5 for further information.
5.6 HEAT PUMP INTERFACE BOX
The Grant EP002 heat pump interface box (supplied with all Grant Aerona³ air
source heat pumps) is designed to provide the voltage free switching for the
Aerona³ air source heat pump, using the space heating and hot water switched
live outputs from the control system wiring centre.
This box can be installed next to the heating system wiring centre.
Alternatively, it can be located nearer to the Aerona³ heat pump, but NOT be
installed externally.
Refer to the Aerona³ installation instructions for further details.
This interface box is NOT required when the cylinder is used with a Grant oil
boiler.
Section 5: Electrical
Page 21
5.7 WIRING DIAGRAMS
The control system shown in this diagram includes the Grant hot water priority
relay (product code: HPWPR1). This ensures that there can be no demand for
space heating and hot water at the same time.
Any demand from the Grant HPIDTM4 DHW Timer and cylinder thermostat for hot
water will activate the relay, immediately interrupting any heating demand
from the Grant NeoStat. This will remain interrupted until the demand for hot
water stops either the cylinder thermostat is satisfied or there is no hot
water output from the timer. For information regarding the operation of the
DHW Boost Kit shown in this control system wiring diagram, please refer to
Section 5.4 of the Aerona³ ASHP installation instructions.
Aerona³ ASHP Wiring Terminals
19 20
18 and 21
Hot water Heating Common
! NOTE !
The volt free remote contact is provided by the Grant EP002 Interface relay
box. Refer to the installation instructions supplied with the Aerona³ ASHP for
further details.
Grant Aerona³ ASHP Remote Controller
34
Grant NeoStat Programmable Room Thermostat
Grant HPIDTM4 DHW Timer
25
32
RT2 RT1 – A2 A1 N L
N L CH4 CH3 CH2 CH1
ASHP Terminals
1
17
2
18
3
19
Link
4
20
5
21
6
22
7
23
8
24
25
Cylinder Du2a7l Thermostat
N
Link
E
E
1 C
2
1 C
2
Overheat Stat
Control Stat
RL1
RL3
Common (Red) Hot Water (Yellow) Heating (Blue)
4 Core ( 3 + E ) Volt free connections from Heating and Hot Water zone valves to terminals 18 – 20 on ASHP terminal PCB via relays on Grant EP002
33
3 21
RL2
Grant EP002 Heat Pump Interface
DHW
CH
P
N
Link
1 234
N
Wiring Centre
1 2 3 4 5 6 7 8 9 10 11 12
Brown Blue Green/Yellow
5A
L N E 240V 50HZ
31
A2
A1 N
2
1
Double Pole Isolator
13A
4
3
Grant Hot Water Priority Relay (HPWPR1)
29
Green/Yellow Brown
Blue
24
A2
12
Blank Spacer
A1
13
34
Cylinder ImHme2ea8rtseiron
N L
Orange Orange Grey Grey
Brown Blue Green/Yellow
Motor HTG 22
2-Port Zone Valve – SH –
Brown Blue Green/Yellow
Motor HW 26
2-Port Zone Valve – DHW –
Earth and some Neutral connections have been excluded for clarity.
Grant Automatic DHW Boost Kit 2
Green/Yellow Blue
Brown
Figure 5-2: S-plan system connection diagram with Grant HW priority relay and
DHW Boost Kit 2
Page 22
! NOTE !
Section 5: Electrical
Earth and some Neutral connections have been excluded for clarity.
Grant GSX1 Solar Controller
Mains Side 230V AC
DANGER
L NRNR
! Sensor Side max. 12V
CAUTION
S1 S2 S3 V1
Cylinder bottom sensor
Collector sensor
Grey Black
Sensors Mains
Wiring Centre
1 2 3 4 5 6 7 8 9 10 11 12
E LNE
Brown Blue Green/Yellow 5A
L N E 240V 50HZ
N
Link
E
E
1
1
C
C
2
2
Overheat Stat
Control Stat
Dual Thermostat
Solar Pump
Brown
Blue
Motor
Green/Yellow
2-Port Solenoid Valve GS222014A
! NOTE !
! NOTE !
Power supply for Solar Thermal control system to be taken from same supply as heating system controls.
The wiring diagram shown in Figure 5-3 corresponds to the system schematic shown in Figure 3-2.
Figure 5-3: Solar Thermal system with high temperature motorised valve – typical wiring diagram
Section 5: Electrical
Page 23
Earth and some Neutral connections have been excluded for clarity.
Grant GSX1 Solar Controller
Mains Side 230V AC
DANGER
L NRNR
! Sensor Side max. 12V
CAUTION
S1 S2 S3 V1
Sensors Mains
Cylinder bottom sensor
Collector sensor
Wiring Centre
1 2 3 4 5 6 7 8 9 10 11 12
E LNE
Brown Blue Green/Yellow 5A
L N E 240V 50HZ
N
Link
E
E
1
1
C
C
2
2
Overheat Stat
Control Stat
Dual Thermostat
Solar Pump
! NOTE !
! NOTE !
Power supply for Solar Thermal control system to be taken from same supply as heating system controls.
The wiring diagram shown in Figure 5-4 corresponds to the system schematic shown in Figure 3-3.
Figure 5-4: Solar Thermal system without high temperature motorised valve – typical wiring diagram
Page 24
Section 5: Electrical
6 COMMISSIONING, DRAINING DOWN AND SAFETY
! NOTE !
! CAUTION !
Commissioning details should be entered in the commissioning and service log
at the back of these instructions.
6.1 FILLING THE CYLINDER
! CAUTION !
Before filling the cylinder check that the immersion heater has not loosened
in transit. Tighten as necessary using a shaped spanner. Stillsons or pipe
grips should not be used.
1. Ensure that all connections are fully tightened. 2. Ensure that the
service valve in the cold water supply is
closed. 3. Open all hot water taps supplied by the cylinder. 4. Slowly open
the service valve in the cold water supply. 5. Continue to fill the cylinder
until water flows from all taps 6. Open the service valve fully and close all
the hot taps. 7. Allow system to stabilise for five minutes. 8. Open each hot
water tap in turn to expel air from the system
pipe work. 9. Check for leaks. 10. Manually operate Temperature and Pressure
Relief Valve
(14) Figures 2-4 and 2-5, to ensure free water flow through discharge pipe.
(Turn knob to left). 11. Heat the water to chosen temperature and then close
the service valve. 12. Drain the cylinder to flush out any flux/solder from
the installation process. Refer to Section 6.2 below. 13. Re-fill the cylinder
as described above. 14. Re-heat cylinder to the required temperature and re-
check for leaks.
6.2 DRAINING DOWN
1. Switch off the electrical power to the immersion heater (important to
avoid damage to the element).
2. Switch off the heat pump (or boiler). 3. Turn off the cold water service
valve (or stop cock). 4. Attach a hose to the drain cock, ensuring that it
terminates at
a level below the hot water cylinder. 5. Open all hot water taps. 6. Open
drain cock in cold water supply to drain unit down.
Refer to Figures 2-4 and 2-5, as appropriate. 7. Disconnect the hot water
draw-off (refer to Figures 2-4 and
2-5, as appropriate). 8. Insert hose pipe to bottom of cylinder, ensuring that
it
terminates at a level below the hot water cylinder. 9. Create suction force
through this hose, ideally through
the use of a syphon pump, to remove the remaining water contained in the
cylinder.
After draining the cylinder do not close the hot taps until the cylinder has
fully cooled. Failure to follow this instruction may result in damage to the
cylinder and will invalidate the guarantee.
6.3 IMMERSION HEATER SAFETY CUT-OUT
The immersion heater incorporates an independent non selfresetting over
temperature cut-out device to prevent excessive water temperatures. Refer to
Section 5.3 for further details. The safety cut-out will operate if: a. The
wiring is incorrect. b. The immersion heater thermostat or cylinder thermostat
fails. c. Thermostat is set too high. To reset the safety cut-out: 1. Unscrew
and remove the nut holding the immersion heater
cover in place. 2. Remove the immersion heater cover.
! WARNING !
Before removing the immersion heater cover, to either reset the safety cut-out
or check/alter the thermostat setting, ensure that the electrical supply is
isolated.
3. The safety cut-out reset pin is positioned to the side of the control knob
(indicated by a triangle with the words `bipolar safety’ above). Refer to
Figure 5-1.
4. If the cut-out has operated, the reset pin will be pushed upwards (to be
level or slightly above the cover).
5. Wait until the temperature has fallen sufficiently. 6. Investigate and
identify the cause of the cut-out operation
and rectify the fault. 7. Press in the reset pin (to its normal operating
position) to
reset the cut-out. Use hand pressure only with a suitably sized implement. 8.
Refit the immersion heater cover correctly and secure in position with
retaining nut. 9. Switch the mains electricity supply back on. If the problem
persists, please contact your installer.
! WARNING !
Water drained from hot water cylinder may be very hot!
Section 6: Commissioning, Draining Down and Safety
Page 25
6.4 COLD WATER DISCHARGE
FROM TUNDISH
There are two reasons why cold water will discharge from the tundish:
1. The pressure reducing valve has malfunctioned (This will cause a large
volume of water to flow through the tundish).
2. The Expansion relief valve is letting by (This will cause a very low
volume of water to flow through the tundish).
In both cases, identify the defective component and replace. All repairs must
be carried out by a competent person.
6.7 CUSTOMER HANDOVER
1. Complete the commissioning and service log at the back of these
instructions and leave the instructions with the user.
2. Explain the operation of the system to the User, referring to Section 12
of these instructions.
3. In particular, make the user aware of what to do if water is seen to flow
from either the T&P Valve or Expansion relief Valve.
4. Refer the user to the Information given in Section 12 of these
instructions.
6.5 HOT WATER DISCHARGE FROM TUNDISH
There are four reasons why hot water will discharge from the tundish:
1. Thermal cut-out has malfunctioned.
2. The control thermostat has malfunctioned.
3. The T & P valve is letting by.
4. The expansion vessel has failed or lost its charge.
In all cases, should a repair be necessary, the work must be carried out by a
competent person.
Isolate the cylinder from all electrical supplies before commencing
maintenance work.
! NOTE !
Leave these Installation, Servicing and User instructions with the user for
future reference.
6.6 EXPANSION VESSEL
1. The expansion vessel is connected into the cold water supply to the
cylinder.
! NOTE !
No valve should be fitted between the expansion vessel and the supply pipe.
2. Ensure that the air charge in the vessel matches the pressure setting
shown on the pressure reducing valve.
3. The expansion vessel must be installed even if an accumulator is fitted.
4. The charge of the vessel must be checked at every annual service.
Page 26
Section 6: Commissioning, Draining Down and Safety
7 MAINTENANCE
! NOTE !
Servicing details should be entered in the commissioning and service log in
Appendix A at the back of these instructions.
7.2 INLET MANIFOLD ASSEMBLY
The inlet manifold assembly should not, under normal circumstance, require any
maintenance. During annual servicing it may be necessary to inspect and/or
clean the expansion relief valve cartridge. The frequency of cleaning will
depend on the local water conditions.
7.1 SERVICING AND MAINTENANCE
1. Servicing and maintenance must only be carried out by a competent unvented
hot water installer, or by Grant Engineering (UK) Limited authorised
personnel.
2. Before any work whatsoever is carried out on the installation, it MUST
first be isolated from the electricity supply.
! WARNING !
Both the primary and secondary systems will contain very hot water that will
scald; therefore care should be taken when opening any joints, seals or
valves.
3. Only use spare parts authorised by Grant Engineering (UK) Limited. The use
of unauthorised spare parts will invalidate the guarantee.
4. Drain the cylinder When draining the cylinder, always switch off the
boiler/heat pump and the immersion heater first. Turn off the water supply at
the service valve or mains stopcock.
Connect a hose pipe to the drain cock (see Figures 2-4 and 2-5) and route it
to a convenient gully. Open the drain cock and all hot taps that are served by
the cylinder. The cylinder may take several minutes to empty completely.
5. In hard water areas it may be necessary from time to time to remove and
de-scale the immersion heater element. Replace the gasket each time it is
removed.
6. Check any in-line strainers which may be fitted in the cold supply to the
cylinder and clean if necessary.
7. Remove the expansion relief valve cartridge. Check and clean valve seat.
Replace cartridge. Refer to Section 7.3 for further information.
8. Check the charge pressure in the expansion vessel and top up as necessary.
The charge pressure should be 3.0 bar. Refer to section 7.4 for further
information.
9. Whilst the hose pipe is connected, the drain cock open and with the
immersion heater removed, the cylinder may be flushed out to remove any
debris, sand or lime scale particles that may have collected in the bottom by
using a further hose pipe connected to the cold water main.
10. Close the drain cock, disconnect the hose, refit the immersion heater and
close all hot water taps before reopening the stopcock. Allow the cylinder
time to fill whilst checking for any leaks. Release any air from the system by
opening each hot water tap individually, starting with the one furthest from
the cylinder.
11. Manually lift the expansion relief and temperature and pressure relief
valve one at a time, every 12 months (more frequently in hard water areas) to
prevent debris from building up behind the valve seat. Whilst carrying out
this operation, check that the discharge to waste is unobstructed. Check that
each valve seals correctly when released. As the valves are pre-calibrated,
they require no further maintenance.
12. Finally switch on the mains electricity supply to the immersion heater
and the boiler. As the system heats up, check again for any leaks and rectify
as necessary.
7.3 EXPANSION RELIEF VALVE CARTRIDGE
1. Isolate the cold water supply. 2. Remove the un-sprung circlip retaining
the expansion relief
valve cartridge in the inlet manifold body. See Figure 4-1. 3. Carefully
remove the expansion relief valve cartridge from
the inlet manifold body. It is a push fit type fitting, so gently pull on the
body of the cartridge until it is released. 4. Clean valve seat face and
seating – do not scratch or damage either seat face or seating. 5. Refit in
reverse order. Ensure that the circlip is fully inserted into its seat.
Expansion valve cartridge (Grant UK product code: GCS08).
! CAUTION !
Upon re-fitting the circlip used to retain the push-fit expansion relief valve
into the inlet manifold body, ensure the circlip is fully inserted into its
seat.
7.4 EXPANSION VESSEL
1. Isolate the cold water supply. 2. Open hot water taps. 3. Drain cylinder
to below the expansion vessel flexible hose
connection. 4. Check expansion vessel air charge. 5. Replace expansion vessel
if necessary. 6. Close drain off cock and turn on cold water supply. 7. Refill
cylinder whilst checking for leaks. 8. When water is flowing freely from taps
close taps.
Section 7: Maintenance
Page 27
8 FAULT FINDING
8.1 INTERMITTENT WATER DISCHARGE
Intermittent water discharge from T&P valve
Expansion vessel charge No reduced
Thermostat failure
Yes
Test vessel and recharge or replace
No
No
Immersion thermostat failure
Primary cylinder thermostat
Faulty T&P valve
Yes
Yes
Yes
Repair or replace immersion thermostat
Repair or replace thermostat
Replace T&P valve
Test for correct operation. If water is still discharging, contact a
compentant engineer.
8.2 CONSTANT WATER DISCHARGE
Constant water discharge from T&P valve
Expansion vessel charge
No
reduced
Yes
Test vessel and recharge or replace
Faulty T&P valve
No
No
Faulty pressure reducing valve
Yes
Yes
Replace T&P valve
Replace pressure reducing valve
Yes
Yes
Test for correct operation. If water is still discharging, contact a competent engineer
Page 28
Section 8: Fault Finding
8.3 NO FLOW FROM HOT WATER TAPS
No flow from hot water taps
Mains supply disconnected?
Yes
Open supply valve or wait for supply to be reconnected
No
Check any in-line strainers which may be fitted to the
system and clean as required
Test for correct operation. If water is still not flowing, contact a competent engineer
8.4 COLD WATER FLOW FROM HOT WATER TAPS
Cold water from hot water taps
Is programmer calling for hot water?
No
Check and set hot water setting
Yes
Yes
Is motorised valve working?
No
Is cylinder stat calling for
Yes
heat?
No
Has thermal cut-out operated?
Yes
No
Check and replace cylinder thermostat
Yes Is boiler working?
No
Check motorised valve and microswitch
Yes
Check and reset button
Section 8: Fault Finding
Test for correct operation. If water is still cold, contact a
competent engineer.
Page 29
8.5 EXCESSIVE HOT WATER FROM TAPS
Excessive hot water from taps
Is cylinder thermostat set too
No
high?
Is system wiring correct?
No
Correct wiring as per
Yes
instructions?
Yes
Yes
Reduce thermostat setting
Is cylinder thermostat operating?
No Replace cylinder thermostat
Yes
Does motorised valve close
No
Repair or replace motorised
when thermostat satisfied?
valve motor
Yes Fault. Contact engineer
Repair or replace motorised valve
Test for correct operation. If water is still cold, contact a
competent engineer.
Page 30
Section 8: Fault Finding
9 SPARE PARTS
9.1 SPARE PARTS
Table 9-1: Grant QR indirect HP cylinders – spare parts Product description
Inlet manifold c/w 3 bar pressure reducing valve and 6 bar expansion relief
valve Expansion relief valve – 6 bar ½ Temperature and pressure relief valve
90°C / 7 bar Tundish – 15mm / 22mm compression Control / Limit thermostat 3kW
immersion heater element – Thermowatt Alloy 800 Immersion heater thermostat –
Thermowatt RTS 3kW immersion heater element (Thermowatt Alloy 800) and
thermostat (Thermowatt RTS) Drain cock 2-port motorised valve (22mm) 18 litre
expansion vessel with 22mm compression fitting (all models EXCEPT 300L) 24
litre expansion vessel with 22mm compression fitting (300L models only)
Product code GCS07 GCS08 GCS09 GCS10 GCS11 GCS30 GCS31 GCS13 GCS14 GCS20
GCS01
GCS04A
Section 9: Spare Parts
Page 31
10 PRODUCT FICHE
Product fiche concerning the COMMISSION DELEGATED REGULATIONS (EU) No 812/2013 of 18 February 2013 (EU) No 814/2013 of 2 August 2013
Model
QRSC QRSC QRSC QRSC QRSC QRSCSL QRSCSL QRSCSL QRTC QRTC QRTC
Model identifier
QRSC150 QRSC180 QRSC210 QRSC250 QRSC300 QRSC150SL QRSC180SL QRSC210SL QRTC210
QRTC250 QRTC300
Energy efficiency
C C C C C C C C C C C
Standing loss (W) 58.75 67.08 74.58 84.17 93.33 66.00 72.00 87.00 74.58 84.17 93.33
Storage volume (litres) 136 167 197 237 289 141 171 201 192 233 284
11 END OF LIFE INFORMATION
GENERAL
Grant hot water storage cylinders incorporate components manufactured from a
variety of different materials. The majority of these materials can be
recycled whilst the smaller remainder cannot.
Materials that cannot be recycled must be disposed of according to local
regulations using appropriate waste collection and/or disposal services.
DISASSEMBLY
There is little risk to those involved in the disassembly of the cylinder if
the process is undertaken with care and reasonable precautions are taken.
RECYCLING
Many of the materials used in Grant hot water storage cylinders can be recycled, as listed below:
COMPONENT
MATERIAL
Shell
Stainless steel (Duplex LDX 2001)
Internal coils
Stainless steel
Bosses
Stainless steel
Compression connections
Brass
Outer casing
Galvanized steel (Estetic Tex organic coating to BS EN 10169)
Top/bottom caps
Polypropylene
T&P valve
Brass
Immersion heater
Brass/stainless steel
Dual thermostat
Plastic/copper
DISPOSAL
All materials other than those listed above must be disposed of responsibly as
general waste.
Neil Sawers Technical Manager
Page 32
Section 10: Product Fiche and Section 11: End of Life Information
12 USER INSTRUCTIONS
12.1 USER INSTRUCTIONS
Your Grant QR indirect heat pump cylinder has been designed to give many years
of trouble-free service and is made from hygienic high grade stainless steel.
IMMERSION HEATERS
Your Grant QR indirect heat pump cylinder is fitted with one 3kW immersion
heater. Refer to Section 5.1 for further details.
The immersion heater in the cylinder can be used to heat your hot water when
your heat pump (or boiler) is switched off, e.g. during the summer months.
In the case of a Grant Aerona³ heat pump, this immersion heater may also be
used to assist in the heating of your hot water if you have a Grant Boost Kit
fitted. Check with your installer. The cylinder immersion heater thermostat
has been factory-set to position · · (refer to Figure 5-1) to give a hot water
temperature of around 65°C, but this could be lowered to 60°C if required. The
immersion heater incorporates an independent non selfresetting over
temperature cut-out device to prevent excessive water temperatures. If this
safety cut-out operates it can be re-set. Refer to Section 6.3.
If the problem persists, please contact your installer.
! WARNING !
If water is seen to flow from either the Temperature & Pressure Relief (T&P
Valve) valve or the Expansion Relief
Valve (EV) on the cylinder seek expert advice immediately.
If the water is flowing from the T&P Valve, immediately: 1. Shut off the
electrical supply to the immersion
heater(s).
2. Shut down the boiler or other heat sources to the cylinder e.g. solar,
heat pump, etc.
3. DO NOT SHUT OFF THE WATER SUPPLY TO THE CYLINDER.
4. Contact your installer to check the system.
IMPORTANT
Do NOT tamper with any of the Safety controls fitted to the cylinder. If you
suspect a fault always contact a competent installer who is qualified to work
on unvented water cylinders.
DUAL THERMOSTAT
Your Grant QR indirect heat pump cylinder is also fitted with a Dual
Thermostat (mounted on the cylinder). Refer to Section 5.4 for further
details.
The cylinder control thermostat has an adjustment range between 25°C and 65°C.
It is recommended that it is set between 50°C and 55°C for Grant Aerona³ heat
pump installations
The high limit (overheat) thermostat will automatically operate if the water
temperature reaches 90°C. If this operates it can be re-set. To do this, first
wait for the cylinder to cool down. Then unscrew the plastic cap and press in
the small re-set pin.
If the problem persists, please contact your installer.
TEMPERATURE SETTINGS
The hot water temperatures on the cylinder immersion heater thermostat and
dual thermostat should not be set any higher than 65°C otherwise nuisance
tripping of either the immersion heater safety cut-out, or the high limit
thermostat (in the dual thermostat) will occur. This temperature could be
decreased to 60°C if required.
Grant UK recommends that the dual thermostat is set between 50°C and 55°C for
Grant Aerona³ heat pump installations.
Setting a lower target temperature will help to minimise the buildup of lime
scale and is likely to increase the longevity of your hot water cylinder.
If you are in any doubt, these temperatures adjustments should be best left to
your installer.
HOT WATER
When a hot tap is turned on there may be a short surge of water, this is quite
normal with unvented systems and does not mean there is a fault.
When you first fill a basin the water may sometimes appear milky. This is due
to very tiny air bubbles in the water, which will clear very quickly.
Section 12: User Instructions
Page 33
13 GUARANTEE
You are now the proud owner of a cylinder from Grant Engineering (UK) Limited,
which has been designed to give you years of reliable, trouble free operation.
Grant Engineering (UK) Limited guarantees the manufacture of the cylinder
including all electrical and mechanical components for a period of twelve
months from the date of installation4, provided that the cylinder has been
installed in full accordance with the installation and servicing instructions
issued.
This will be extended to a total period of two years if the cylinder is
registered with Grant Engineering (UK) Limited within thirty days of
installation4 and is serviced at twelve monthly intervals3. See main Terms and
Conditions below. In addition, the stainless steel (shell) used in the
manufacture of the cylinder is guaranteed for a period of twenty five years
from the date of installation4.
Registering the product with Grant Engineering (UK) Limited
Please register your cylinder with Grant Engineering UK Limited within thirty
days of installation. To do so visit www.grantuk. com and follow the links to
the `Homeowners Zone’, where you can register your cylinder for a further
twelve months guarantee (giving two years from the date of installation4).
This does not affect your statutory rights1.
If a fault or defect occurs within the manufacturer’s guarantee period
If your cylinder 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 cylinder has been correctly installed,
commissioned and serviced (if the appliance has been installed for more than
twelve months) by a competent person and the fault is not due to tampering,
misuse or the failure of any external components not supplied by Grant
Engineering (UK) Limited, e.g. pipework, etc.
This two year guarantee only applies if the cylinder is registered with Grant
Engineering (UK) Limited within thirty days of installation4 and is serviced
after twelve months3.
In the first 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 +44 (0)1380 736920 who will arrange for a competent service
engineer to rectify the fault.
Remember – before you contact Grant Engineering (UK) Limited:
· Ensure the cylinder has been installed, commissioned and serviced by a
competent person in accordance with the installation and servicing
instructions.
· Ensure the problem is not being caused by the heating system, its controls
or any system connected to it.
Free of charge repairs
During the two year guarantee period no charge for parts or labour will be
made, provided that the cylinder has been installed and commissioned correctly
in accordance with the manufacturer’s installation and servicing instructions,
it was registered with Grant Engineering (UK) Limited within thirty days of
installation and4, for cylinders over twelve months old, details of annual
service is available3.
The following documents must be made available to Grant Engineering (UK)
Limited on request:
· Proof of purchase
· Benchmark Installation, Commissioning and Service Record Log Book 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, external electrics and external components. SeeExtent of manufacturer’s
guarantee’ below.
Extent of the manufacturer’s guarantee:
The manufacturer’s guarantee does not cover the following:
· If the cylinder has been installed for over two years
· If the cylinder has not been installed, commissioned, or serviced by a
competent person in accordance with the installation and servicing
instructions.
· The serial number has been removed or made illegible.
· Fault(s) due to accidental damage, tampering, unauthorised adjustment,
neglect, misuse or operating the cylinder contrary to the manufacturer’s
installation and servicing instructions.
· Damage due to external causes such as bad weather conditions (flood, storms,
lightning, frost, snow or ice), fire, 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.
· Cylinder servicing, de-scaling or flushing. · Checking and replenishing
system pressure. · Pipework, electrical cables and plugs and external controls
not supplied by Grant Engineering (UK) Limited.
· Heating system components, such as radiators, pipes, fittings, pumps and
valves not supplied by Grant Engineering (UK) Limited.
· Instances where the cylinder has been un-installed and reinstalled in
another location.
· Use of spare parts not authorised by Grant Engineering (UK) Limited.
Page 34
Section 13: Guarantee
Terms of manufacturer’s guarantee:
· The Company shall mean Grant Engineering (UK) Limited.
· The cylinder must be installed by a competent installer and in full
accordance with the relevant Codes of Practice, Regulations and Legislation in
force at the time of installation.
· The cylinder is guaranteed for two years from the date of installation4,
providing that after twelve months the annual service3 has been completed and
the cylinder registered with the Company within thirty days of the
installation4. Any work undertaken must be authorised by the Company and
carried out by a competent service engineer.
· The stainless steel (shell) used in the manufacture of the cylinder is
guaranteed for a period of twenty five years (parts only) from the date of
installation4. This is subject to the following:
· The cylinder is operated correctly, in accordance with the installation and
servicing instructions.
· Proof is provided that the connecting system/s has been flushed 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 cylinder in accordance
with the manufacturer’s instructions.
· The cylinder is registered with the Company within thirty days of
installation4. Failure to do so does not affect 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 it cannot be held responsible for any consequences
of delay however caused.
· This guarantee applies to Grant Engineering (UK) Limited cylinders purchased
and installed on the UK mainland, Isle of Wight, Channel Islands, Isle of Man
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 cylinder is supplied under the guarantee (due to a
manufacturing fault) the product guarantee continues from the installation
date of the original cylinder, and not from the installation date of the
replacement4.
· The replacement of a cylinder under this guarantee does include any
consequential costs.
· The cylinder 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 cylinder must not be sited in a location where it may be subjected to
frost.
Hard water advice If you live in a hard water area, protection against scaling
in your cylinder must be provided. You should fit an appropriate scale
inhibitor or water softener as any breakdown caused by water scaling is not
covered by either the manufacturer’s guarantee. Ask your installer for advice.
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 definition, Northern Ireland
and Scilly Isles are not considered part of the UK mainland. 3. We recommend
that your cylinder is serviced every twelve months (even when the guarantee
has expired) to prolong the lifespan and ensure it is operating safely and
efficiently. 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.
Section 13: Guarantee
Page 35
APPENDIX A
Customer Details Customer Name Customer Address
INSTALLATION, COMMISSIONING AND SERVICE RECORD LOG BOOK
TEL No.
! NOTE !
1. This Log Book is only for use in Great Britain.
2. Please, keep the Log Book in a safe place for future reference.
3. This Log Book is to be completed in full by the competent person(s) who
commissioned the equipment and then handed to the customer. When this is done,
the Log Book is a commissioning certificate that can be accepted as evidence
of compliance with the appropriate Building Regulations.
4. Failure to install and commission this appliance to the manufacturer’s
instructions may invalidate the guarantee (refer to Section 13 – Guarantee).
Installer & Commissioning Engineer Details
Company Name
Date
Company Address
Installer Name
Registration Details
Registered operative ID card NO. (if applicable)
Commissioning Engineer Details (if different) Company Name
Company Address
TEL No. Date
Installer Name
Registration Details
Registered operative ID card NO. (if applicable)
Page 36
TEL No.
Appendix A: Installation, Commissioning and Service Record Log Book
! NOTE !
IT IS THE RESPONSIBILITY OF THE INSTALLER TO COMPLETE THIS LOGBOOK AND PASS IT
ON TO THE CUSTOMER, FAILURE TO DO SO MAY INVALIDATE THE CYLINDER GUARANTEE.
Appliance and Time Control Details
Manufacturer
GRANT UK
Model
Capacity
Litres
Serial No.
Type Time Control
Programmer or Time Switch
COMMISSIONING PROCEDURE INFORMATION
Heat Source Primary Settings (indirect heating only)
Is the primary a sealed or open vented system? Sealed Open
Unvented
What is the primary heat source flow temperature? _____ °C
Incoming Water Supply Information
What is the incoming static cold water pressure at the inlet to the pressure reducing valve? _____ Bar
Has strainer (if fitted) been cleaned of installation debris? YES
NO
Has a water scale reducer been fitted? YES
NO
What type of scale reducer has been fitted?
Hot Water Cylinder Information
Are combined temperature and pressure relief valve and expansion valve fitted and discharge tested? YES
NO
Is primary energy source cut out fitted (normally 2-Port valve)? YES
NO
What is the pressure reducing valve setting (if fitted)? _____ Bar
Where is operating pressure reducing valve situated?
Has the expansion vessel or internal air space been checked? YES NO
What is the hot water temperature at the nearest outlet?
_____ °C
Appendix A: Installation, Commissioning and Service Record Log Book
Page 37
Hot Water System Information
Does the hot water system comply with the appropriate Building Regulations?
YES
Has the system been installed and commissioned in accordance with the manufacturer’s instructions? YES
Have you demonstrated the operation of the system controls to the customer? YES
Have you left all the Manufacturer’s literature with the customer? YES
Competent Person’s Signature
Customer’s Signature
(To confirm demonstrations of equipment and receipt of appliance instructions)
Page 38
Appendix A: Installation, Commissioning and Service Record Log Book
SERVICE INTERVAL RECORD
It is recommended that your hot water system is serviced regularly and that
your service engineer completed the appropriate Service Interval Record below.
! NOTE !
SERVICE PROVIDER Before completing the appropriate Service Record below,
please ensure you have carried out the service as described in the
manufacturer’s instructions and in compliance with all relevant codes of
practice.
Date: Engineer name: Company name: TEL No. Comments
Date: Engineer name: Company name: TEL No. Comments
Service 6
Service 1
Signature
Date: Engineer name: Company name: TEL No. Comments
Signature
Date: Engineer name: Company name: TEL No. Comments
Service 7
Service 2
Signature
Date: Engineer name: Company name: TEL No. Comments
Signature
Date: Engineer name: Company name: TEL No. Comments
Service 8
Service 3
Signature
Date: Engineer name: Company name: TEL No. Comments
Signature
Date: Engineer name: Company name: TEL No. Comments
Service 9
Service 4
Signature
Date: Engineer name: Company name: TEL No. Comments
Signature
Date: Engineer name: Company name: TEL No. Comments
Service 10
Service 5
Signature
Signature
Appendix A: Installation, Commissioning and Service Record Log Book
Page 39
GRANT ENGINEERING (UK) LIMITED Frankland Road, Blagrove Industrial Estate,
Swindon, SN5 8YG
Tel: +44 (0)1380 736920 Fax: +44 (0)1380 736991 Email: info@grantuk.com
www.grantuk.com
References
Read User Manual Online (PDF format)
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