Installation Manual

Installation Manual
Installation Manual
Unvented Direct & Indirect Water Heaters
Installation & Servicing Instructions
Pack Contents
• Unvented water heater incorporating immersion heater(s) & thermal controls
• Factory fitted temperature/pressure relief valve (set at 90°C / 1 Mpa (10bar))
• Cold water combination valve assembly
• Expansion vessel & mounting bracket
• Tundish
• 2 Port motorised valve (indirect models only)
• Compression nuts & olives
• Immersion heater spanner
• Installation & servicing instructions
• Guarantee card
IMPORTANT
Please read & understand all these instructions before commencing installation.
Please leave this manual with the customer for future reference.
1
Contents
Introduction.............................................................. 2
General Requirements............................................ 3
Installation General................................................. 5
Installation Discharge.............................................. 7
Installation Direct.................................................... 11
Installation Indirect................................................. 12
Commissioning....................................................... 14
Maintenance........................................................... 15
User Instructions.................................................... 16
Fault Finding & Servicing....................................... 17
Spares.................................................................... 18
Heat Loss............................................................... 19
Environmental Information..................................... 19
Commissioning Check List..................................... 20
Introduction
The cylinder is a purpose designed unvented water
heater. The unit has a stainless steel inner vessel,
which ensures an excellent standard of corrosion
resistance. The outer casing is a combination of
resilient thermoplastic mouldings and plastic coated
corrosion proofed steel sheet. All products are insulated
with CFC free polyurethane foam to give good heat loss
performance. (see Table 06, page 19)
The unit is supplied complete with all the necessary
safety and control devices needed to allow connection
to the cold water mains. All these components are
preset and not adjustable.
This appliance complies with the requirements of the
CE marking directive and is Kiwa approved to show
compliance with Building Regulations (Section G3).
The following instructions are offered as a guide to
installation which must be carried out by a competent
plumbing and electrical installer in accordance with
Building Regulation G3, The Building Standards
(Scotland) Regulations 1990, or The Building
Regulations (Northern Ireland).
NOTE: Prior to installation the unit should be stored
in an upright position in an area free from excessive
damp or humidity.
Service Record....................................................... 21
Guarantee.............................................................. 24
Technical Support................................................... 24
THE BENCHMARK SCHEME
Benchmark places responsibilities on both manufacturers and installers. The purpose is to ensure that customers are provided with the correct equipment for their
needs, that it is installed, commissioned and serviced
in accordance with the manufacturer’s instructions by
competent persons and that it meets the requirements
of the appropriate Building Regulations and relevant
electrical qualifications. The Benchmark Checklist
can be used to demonstrate compliance with Building
Regulations and should be provided to the customer
for future reference. Installers are required to carry out
installation, commissioning and servicing work in accordance with the Benchmark Code of Practice which is
available from the Heating and Hotwater Industry Council who manage and promote the Scheme. Visit www.
centralheating.co.uk for more information.
2
ORTAN
General Requirements
IMPORTANT:
This appliance can be used by children aged
from 8 years and above and persons with
reduced physical sensory or mental capabilities
or lack of experience and knowledge if they
have been given supervision or instruction
concerning use of the appliance in a safe way
and understand the hazards involved. Children
shall not play with the appliance. Cleaning
and user maintenance shall not be made by
children without supervision.
Children must be supervised to ensure they do
not play with the appliance.
WARNING: Do not switch on if there is a possibility that
the water in the heater is frozen.
Siting The Unit
The cylinder must be vertically floor mounted. Although
location is not critical, the following points should be
considered:
•
•
•
•
•
The cylinder should be sited to ensure minimum
dead leg distances, particularly to the point of most
frequent use.
Avoid siting where extreme cold temperatures will
be experienced. All exposed pipe work should be
insulated.
The discharge pipework from the safety valves
must have minimum fall of 1:200 from the unit and
terminate in a safe and visible position.
Access to associated controls and immersion
heaters must be available for the servicing and
maintenance of the system. Where these controls
are installed against a wall a minimum distance of
250mm must be left (see Fig. 01, below).
Ensure that the floor area for the cylinder is level
Fig. 01: Siting the Unit
Nominal Weight of
Capacity unit full
(litres)
(Kg)
Weight
of unit
(Kg)
Type
Model
Reference
Indirect
120 Ind
120
147
27
150 Ind
150
184
31
170 Ind
170
203
33
210 Ind
210
251
41
250 Ind
250
300
50
300 Ind
300
360
60
120 Dir
120
145
25
150 Dir
150
178
28
170 Dir
170
199
29
210 Dir
210
246
36
250 Dir
250
295
45
300 Dir
300
355
55
Direct
and capable of permanently supporting the weight
when full of water. (see Table 01, above)
Water Supply
Bear in mind that the mains water supply to the
property will be supplying both the hot and cold water
requirements simultaneously.
It is recommended that the maximum water demand
is assessed and the water supply checked to
ensure this demand can be satisfactorily met.
Note: A high mains water pressure will not always
guarantee high flow rates.
Wherever possible the mains supply pipe should be
22mm. We suggest the minimum supply requirements
should be 0.15MPa (1.5 bar) pressure and 20 litres
per minute flowrate. However, at these values outlet
flow rates may be poor if several outlets are used
simultaneously. The higher the available pressure and
flow rate the better the system performance.
The cylinder has an operating pressure of 0.35MPa (3.5
bar) which is controlled by the cold water combination
valve assembly. The cold water combination valve
assembly can be connected to a maximum mains
pressure of 1.6MPa (16 bar).
WALL
Min 250mm
Table 01: Unit weights
Min 250mm
Outlet/Terminal Fittings (Taps, Etc.)
The cylinder can be used with most types of terminal
fittings. It is advantageous in many mixer showers to
have balanced hot and cold water supplies. In these
instances a balanced cold water connection should
be placed between the expansion vessel connection
and the cold water combination valve assembly (see
Fig. 05, page 10). Outlets situated higher than the
cylinder will give outlet pressures lower than that at
the heater, a 10m height difference will result in a 1 bar
pressure reduction at the outlet. All fittings, pipework
and connections must have a rated pressure of at least
6 bar at 80°C.
3
Limitations
The cylinder should not be used in association with
any of the following:
• Solid fuel boilers or any other boiler in which the
energy input is not under effective thermostatic
control, unless additional and appropriate safety
measures are installed.
• Ascending spray type bidets or any other class 1
back syphonage risk requiring that a type A air gap
be employed.
• Steam heating plants unless additional and
appropriate safety devices are installed.
• Situations where maintenance is likely to be
neglected or safety devices tampered with.
• Water supplies that have either inadequate pressure
or where the supply may be intermittent.
• Situations where it is not possible to safely pipe
away any discharge from the safety valves.
• In areas where the water consistently contains a
high proportion of solids, e.g. suspended matter that
could block the strainer, unless adequate filtration
can be ensured.
• In areas where the water supply contains chloride
levels that exceed 250mg/l.
Checklist
• Unvented cylinder
• Cold control pack
- Tundish
- Combination valve
- Expansion vessel
- Tool - Element spanner
- Compression nuts & olives
- 2 Port motorised valve
• Literature pack
- Installation manual
- Guarantee card
Operational Summary
Maximum mains pressure
Operating pressure/PRV
Maximum design pressure
Expansion vessel charge pressure
Expansion relief valve setting T&P relief valve setting
Maximum primary circuit pressure
(Indirect only)
Pressure drop (Primary coil)
Storage capacity
Weight when full
1.6MPa (16 bar)
0.35MPa (3.5 bar)
0.6MPa (6 bar)
0.35MPa (3.5 bar)
0.6MPa (6 bar)
90-95°C/1.0MPa (10 bar)
0.3MPa (3 bar)
0.02MPa (0.2 bar)
see Table 1 - page 3
see Table 1 - page 3
Indirect models in conformance with BS EN 12897:2006
Note: Although the primary coil pressure rating is 1.0Mpa (10 bar) the 2 port zone valve supplied with the
cylinder is only rated 0.86MPa (8.6 bar). If the cylinder is to be plumbed into a system delivering 1.0MPa (10
bar) a suitable 2 port zone valve will have to be sourced.
4
Installation General
Pipe Fittings
All pipe fittings are made via 22mm compression fittings
directly to the unit. The fittings are threaded 3/4”BSP
male parallel, should threaded pipe connections be
required.
Cold Feed
A 22mm cold water supply is recommended, however,
if a 15mm (1/2”) supply exists, which provides sufficient
flow, this may be used (although more flow noise may
be experienced).
A stopcock or servicing valve should be incorporated
into the cold water supply to enable the cylinder and its
associated controls to be isolated and serviced.
Cold Water Combination Valve Assembly
The cold water combination valve can be connected
anywhere on the cold water cylinder supply prior to
the expansion vessel (see Fig. 05, page 10). The cold
water combination valve is installed as a complete
one-piece unit. The valve incorporates the pressure
reducer, strainer, expansion valve and check valve.
Ensure that the valve is installed with the direction
of flow arrows pointing in the correct direction. No
other valves should be placed between the cold water
combination valve and the cylinder.
Drain Tap
A suitable drain tap should be installed in the cold water
supply to the cylinder between the expansion valve (see
Fig. 05, page 10) and the heater at as low a level as
possible. It is recommended that the outlet point of the
drain pipework be at least 1 metre below the level of
the heater (this can be achieved by attaching a hose
to the drain tap outlet spigot).
Figure 02: Cold Water Combination Valve Assembly
Expansion valve
Expansion valve
outlet (15mm)
Cold mains
connection
(22mm)
Outlet connection
(22mm)
Expansion Vessel
The expansion vessel accommodates expansion that
results from heating the water inside the unit. The
expansion vessel is pre-charged at 0.35MPa (3.5 bar).
The expansion vessel must be connected between
the expansion valve and the cylinder (see Fig. 05,
page 10). The location of the expansion vessel should
allow access to recharge the pressure as and when
necessary, this can be done using a normal car foot
pump. It is recommended that the expansion vessel
is adequately supported. An expansion vessel wall
mounting bracket is supplied for this purpose and
should be fitted.
Secondary Circulation
If secondary circulation is required it is recommended
that it be connected to the cylinder as shown (see Fig.
06, page 10) via a swept tee joint into the cold feed to
the unit. A swept tee joint is available as an accessory
(order code no. 5133565).
The secondary return pipe should be in 15mm pipe
and incorporate a check valve to prevent backflow. A
suitable WRAS approved bronze circulation pump will
be required. On large systems, due to the increase
in system water content, it may be necessary to fit an
additional expansion vessel to the secondary circuit.
This should be done if the capacity of the secondary
circuit exceeds 10 litres.
Pipe capacity (copper):
15mm O.D. = 0.13 l/m (10 litres = 77m)
22mm O.D. = 0.38 l/m (10 litres = 26m)
28mm O.D. = 0.55 l/m (10 litres = 18m)
NOTE: In direct electric installations where a secondary
circulation is required particular attention should be
paid by the installer to maintain the returning water
temperature (guidelines state that a minimum of 55°C
return temperature is advisable). Factors such as,
but not limited to, secondary circulation flow rates,
minimising heat loss of all secondary circuit pipework
and timed operation during periods of high demand
are critical to the correct operation and longevity of the
heating element(s) and thermostats.
Secondary circulation is not recommended for direct
electric units using off-peak tariffs where the secondary
circulation is not controlled in conjunction with the heat
source as performance can be affected.
Outlet
The hot water outlet is a 22mm compression fitting
located at the top of the cylinder. Hot water distribution
pipework should be 22mm pipe with short runs of
15mm pipe to terminal fittings such as sinks and basins.
Pipe sizes may vary due to system design.
Pressure reducing
valve cartridge
(3.5bar)
5
Fig. 03: General Dimensions
Ø5
592
50
45°
25°
30° °
45
Hot Outlet
B
A
T&P Valve
Cold Inlet
315
354 - Indirect
306 - Direct
Primary Flow
Primary Return
Table 02: Dimensions and Performance
Type
Indirect
Direct
Model
Reference
Dimensions (mm)
Primary Flow
(ltrs/min @80°C
±2°C)
Coil Rating Heat-up Time
(kW)
(mins)
A
B
120 Ind
931
616
15
12.5
29
108
150 Ind
1114
800
15
12.5
37
135
170 Ind
1241
927
15
15
35
157
210 Ind
1499
1184
15
15
43
199
250 Ind
1752
1379
15
18
43
240
300 Ind
2065
1694
15
18
49
273
120 Dir
931
616
121
108
150 Dir
1114
800
152
135
170 Dir
1241
927
173
157
210 Dir
1499
1184
215
199
250 Dir
1752
1437
260
240
300 Dir
2065
1751
315
273
Notes:
1. Indirect cylinders tested in conformance with BS EN 12897:2006
2. Heat up time from cold through 45°C, with a primary flow rate 15ltrs/min at 80°C +/- 2°C.
3. Direct heating times assume use of lower element only, from cold, through 45°C.
6
Hot Water
Capacity (ltrs)
(volume of water
drawn off >40°C)
Installation Discharge
Discharge Pipework
It is a requirement of Building Regulation G3 that any
discharge from an unvented system is conveyed to
where it is visible, but will not cause danger to persons in
or about the building. The tundish and discharge pipes
should be fitted in accordance with the requirements
and guidance notes of Building Regulation G3. The G3
Requirements and Guidance section 3.50 - 3.63 are
reproduced in the following sections of this manual.
For discharge pipe arrangements not covered by G3
guidance advice should be sought from your local
Building Control Officer. Any discharge pipe connected
to the pressure relief devices (expansion valve and
temperature/pressure relief valve) must be installed
in a continuously downward direction and in a frost
free environment.
Water may drip from the discharge pipe of the
pressure relief device. This pipe must be left open to
the atmosphere. The pressure relief device is to be
operated regularly to remove lime deposits and to
verify that it is not blocked.
G3 REQUIREMENT
“...there shall be precautions...to ensure that the
hot water discharged from safety devices is safely
conveyed to where it is visible but will not cause danger
to persons in or about the building.”
The following extract is taken from the latest G3
Regulations
Discharge pipes from safety devices
Discharge pipe D1
3.50Each of the temperature relief valves or combined
temperature and pressure relief valves specified in 3.13
or 3.17 should discharge either directly or by way of
a manifold via a short length of metal pipe (D1) to a
tundish.
3.51The diameter of discharge pipe (D1) should be
not less than the nominal outlet size of the temperature
relief valve.
3.52Where a manifold is used it should be sized to
accept and discharge the total discharge form the
discharge pipes connected to it.
3.53Where valves other than the temperature and
pressure relief valve from a single unvented hot water
system discharge by way of the same manifold that
is used by the safety devices, the manifold should be
factory fitted as part of the hot water storage system
unit or package.
Tundish
3.54The tundish should be vertical, located in the
same space as the unvented hot water storage system
and be fitted as close as possible to, and lower than,
the valve, with no more than 600mm of pipe between
the valve outlet and the tundish (see Fig 04 page 9).
Note: To comply with the Water Supply (Water Fittings)
Regulations, the tundish should incorporate a suitable
air gap.
3.55Any discharge should be visible at the tundish. In
addition, where discharges from safety devices may
not be apparent, e.g. in dwellings occupied by people
with impaired vision or mobility, consideration should
be given to the installation of a suitable safety device
to warn when discharge takes place, e.g. electronically
operated.
Discharge pipe D2
3.56The discharge pipe (D2) from the tundish
should:
(a) have a vertical section of pipe at least 300mm
long below the tundish before any elbows or bends in
the pipework (see Fig. 04 page 9); and
(b) be installed with a continuous fall thereafter of at
least 1 in 200.
3.57The discharge pipe (D2) should be made of:
(a) metal; or
(b) other material that has been demonstrated to
be capable of safely withstanding temperatures of
the water discharged and is clearly and permanently
marked to identify the product and performance
standard (e.g. as specified in the relevant part of BS
7291).
3.58The discharge pipe (D2) should be at least one
pipe size larger than the nominal 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 the
equivalent resistance length should be at least two
sizes larger than the nominal outlet size of the safety
device; between 18 and 27m at least 3 sizes larger, and
so on; bends must be taken into account in calculating
the flow resistance. (See, Table 03 page 9), and the
worked example.
Note: An alternative approach for sizing discharge
pipes would be to follow Annex D, section D.2 of
BS 6700:2006 Specification for design, installation,
testing and maintenance of services supplying water
for domestic use within buildings and their curtilages.
3.59Where a single common discharge pipe serves
more than one system, it should be at least one pipe
size larger than the largest individual discharge pipe
(D2) to be connected.
7
3.60The discharge pipe should not be connected to
a soil discharge stack unless it can be demonstrated
that the soil discharge stack is capable of safely
withstanding temperatures of the water discharged,
in which case, it should:
(a) contain a mechanical seal, not incorporating a
water trap, which allows water into the branch pipe
without allowing foul air from the drain to be ventilated
through the tundish;
(b) be a separate branch pipe with no sanitary
appliances connected to it;
(c) if plastic pipes are used as branch pipes carrying
discharge from a safety device they should be either
polybutalene (PB) to Class S of BS 7291-2:2006 or
cross linked polyethylene (PE-X) to Class S of BS
7291-3:2006; and
(d) be continuously marked with a warning that no
sanitary appliances should be connected to the pipe.
Note:
1. Plastic pipes should be joined and assembled
with fittings appropriate to the circumstances in which
they are used as set out in BS EN ISO 1043-1.
2. Where pipes cannot be connected to the stack it
may be possible to route a dedicated pipe alongside
or in close proximity to the discharge stack.
Termination of discharge pipe
3.61The 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.
3.62Examples of acceptable discharge arrangements
are:
(a) to a trapped gully with the end of the pipe below
a fixed grating and above the water seal;
(b) downward discharges at low level; i.e. up to
100mm above external surfaces such as car parks,
hard standings, grassed areas etc. are acceptable
providing that a wire cage or similar guard is positioned
to prevent contact, whilst maintaining visibility; and
(c) discharges at high level: e.g. into a metal hopper
and metal downpipe with the end of the discharge pipe
clearly visible or onto a roof capable of withstanding
high temperature discharges of water and 3m from
any plastic guttering system that would collect such
discharges.
3.63The discharge would consist of high temperature
water and steam. Asphalt, roofing felt and nonmetallic rainwater goods may be damaged by such
discharges.
8
Worked Example of Discharge Pipe Sizing
Fig. 04: shows a G1/2 temperature relief valve with a
discharge pipe (D2) having 4 No. elbows and length of
7m from the tundish to the point of discharge.
From Table 03:
Maximum resistance allowed for a straight length of
22mm copper discharge pipe (D2) from a G1/2
temperature relief valve is 9.0m.
Subtract the resistance for 4 No. 22mm elbows at 0.8m
each = 3.2m
Therefore the permitted length equates to: 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 pipe (D2) from a G1/2 temperature relief valves
equates to 18m.
Subtract the resistance of 4 No. 28mm elbows at 1.0m
each = 4.0m
Therefore the maximum permitted length equates to:
14m
As the actual length is 7m, a 28mm (D2) copper pipe
will be satisfactory.
Warnings:
• Under no circumstances should the factory fitted
temperature/pressure relief valve be removed other
than by a competent person. To do so will invalidate
any guarantee or claim.
• The cold water combination valve assembly must be
fitted on the mains water supply to the cylinder.
• No control or safety valves should be tampered with
or used for any other purpose.
• The discharge pipe should not be blocked or used
for any other purpose.
• The tundish should not be located adjacent to any
electrical components.
Table 03: Sizing of copper discharge pipe (D2) for common temperature relief valve outlet sizes
NOTE: The table below is based on copper tube. Plastic pipes may be of different bore and resistance. Sizes and
maximum lengths of plastic should be calculated using data prepared for the type of pipe being used.
MAXIMUM RESISTANCE
ALLOWED,
EXPRESSED AS A
LENGTH OF STRAIGHT
PIPE (I.E. NO ELBOWS
RESISTANCE
CREATED BY
EACH ELBOW
OR BEND
22mm
28mm
35mm
UP TO 9M
UP TO 18M
UP TO 27M
0.8M
1.0M
1.4M
22mm
28mm
35mm
42mm
UP TO 9M
UP TO 18M
UP TO 27M
1.0M
1.4M
1.7M
28mm
35mm
42mm
54mm
UP TO 9M
UP TO 18M
UP TO 27M
1.4M
1.7M
2.3M
MINIMUM
SIZE OF
DISCHARGE
PIPE D1
MINIMUM SIZE OF
DISCHARGE PIPR
D2 FROM TUNDISH
G 1/2
15mm
G 3/4
G1
VALVE
OUTLET
SIZE
OR BENDS)
Figure 04: Typical Discharge Pipe Arrangment (Extract From Building Regulation G3 Guidance Section 5.50)
Safety device
(e.g. Temperature
relief valve)
Metal discharge pipe (D1) from
Temperature relief valve to tundish
Tundish
600mm maximum
300mm
minimum
Discharge below
fixed grating
(Building Regulation
G3 section 3.61 gives
alternative points
of discharge)
Fixed grating
Discharge pipe (D2) from tundish,
with continuous fall. See Building
Regulation G3 section 3.56,
Table 1 and worked example
Trapped
gully
9
Figure 05: Typical Installation - Schematic
To hot outlets
T&P relief
valve
Balanced cold
water connection
(if required)
Expansion
vessel
Cold water
combination
valve
Isolating valve
(not supplied)
Blank housing
(250 & 300 Indirect
models only)
Mains water
supply
Element/
controls
housing
Secondary return
(if required)
use swept tee
Primary return
Primary flow
Drain cock
(not supplied)
Inlet
Tundish
Figure 06: Secondary Circulation Connection
Cold Supply
Check Valve
Secondary
Return
Swept Tee
Secondary
Circulation
Pump
Cold Inlet
Connection
10
Discharge
pipe
Installation - Direct
Figure 07: Electrical Connections (Direct Schematic)
Safety
DISCONNECT FROM THE MAINS ELECTRICAL
SUPPLY BEFORE REMOVING ANY COVERS.
Never attempt to replace the immersion heater(s) other
than with the recommended immersion heater(s).
DO NOT BYPASS THE THERMAL CUT-OUT(S) IN
ANY CIRCUMSTANCES. Ensure the terminal shroud
is fitted. Ensure the two male spade terminations are
pushed firmly into the corresponding terminations on
the element assembly.
In case of difficulty contact service support; contact
details available at the back of this booklet.
Electrical Supply
All electrical wiring should be carried out by a
competent electrician and be in accordance with the
latest I.E.E Wiring Regulations.
Each circuit must be protected by a suitable fuse
and double pole isolating switch with a contact
separation of at least 3mm in both poles.
N
L
1.5mm2 3 Core
HOFR sheathed
cable
The immersion heater(s) should be wired in accordance
with Fig 07, opposite. The immersion heaters MUST
be earthed. The supply cable should be 1.5mm2 3 core
HOFR sheathed and must be routed through the cable
grip provided with the outer sheath of the cable firmly
secured by tightening the screws on the cable grip.
DO NOT operate the immersion heaters until the
cylinder has been filled with water.
Ensure the thermostat and thermal cut-out sensing
bulbs are pushed fully into the pockets on the element
plate assembly.
Plumbing Connections
Direct cylinders require the following pipework
connections.
• Cold water supply to and from inlet controls.
• Outlet to hot water draw off points.
• Discharge pipework from valve outlets to
tundish.
11
Installation - Indirect
Safety
DISCONNECT FROM THE MAINS ELECTRICAL
SUPPLY BEFORE REMOVING ANY COVERS.
Never attempt to replace the immersion heater other
than with the recommended authorised immersion
heater.
DO NOT BYPASS THE THERMAL CUT-OUT(S)
IN ANY CIRCUMSTANCES. Ensure the two male
spade terminations on the underside of the combined
thermostat and thermal cut-out are pushed firmly onto
the corresponding terminations on the element plate
assembly.
In case of difficulty contact service support; contact
details available at the back of this booklet.
Electrical Supply
All electrical wiring should be carried out by a
competent electrician and be in accordance with the
latest I.E.E Wiring Regulations.
Each circuit must be protected by a suitable fuse
and double pole isolating switch with a contact
separation of at least 3mm in both poles.
The immersion heater should be wired in accordance
with Fig 08, opposite. The immersion heater MUST be
earthed. The supply cable should be 1.5mm2 3 core
HOFR sheathed and must be routed through the cable
grip provided with the outer sheath of the cable firmly
secured by tightening the screws on the cable grip.
Boiler Selection
The boiler should have a control thermostat and non
self-resetting thermal cut-out and be compatible with
unvented storage water heaters. Where use of a boiler
without a thermal cut-out is unavoidable a “low head”
open vented primary circuit should be used. The feed
and expansion cistern head above the cylinder should
not exceed 2.5m.
Primary Circuit Control
The 2 port motorised valve supplied with the cylinder
MUST be fitted on the primary flow to the cylinder heat
exchanger (coil) and wired in series with the indirect
control thermostat and thermal cut-out fitted to the
unit. Primary circulation to the cylinder heat exchanger
(coil) must be pumped; gravity circulation WILL NOT
WORK.
Space and Heating Systems Controls
The controls provided with the cylinder will ensure the
safe operation of the unit within the central heating
system. Other controls (eg. room thermostat and
timer) will be necessary to control the space heating
requirements and times that the system is required
to function, (see Fig. 08 below). The cylinder is
compatible with most heating controls, examples of
electrical circuits are shown in Figs. 09 and 10 (Page
13). However, other systems may be suitable, refer
to the controls manufacturers’ instructions, supplied
with the controls selected, for alternative system wiring
schemes.
Figure 08: Electrical Connections (indirect schematic)
DO NOT operate the immersion heaters until the
cylinder has been filled with water.
Ensure the thermostat and thermal cut-out sensing bulbs
are pushed fully into the pockets on the element plate
assembly.
Plumbing Connections
Indirect cylinders require the following
pipework connections.
• Cold water supply to and from inlet controls.
• Outlet to hot water draw off points.
• Discharge pipework from valve outlets to
tundish.
• Connection to the primary circuit.
All connections are 22mm compression. However,
3/4”BSP parallel threaded fittings can be fitted to the
primary coil connections if required.
12
Element Connections
Indirect control
wiring
1
2
3
L
N
1.5mm² 3 Core
HOFR sheathed
cable
Fig. 09: Schematic Wiring Diagram - Basic 2 x 2 port valve system ( ‘S’ plan )
Cylinder terminal block
2
1
3
3
Zone valve (HTG)
Room stat
Zone valve (DHW)
(supplied)
3
2
G Br Bl 0
2
1
G Br Bl 0 GY
1
2
1
3
L
(Supply)
N
1
2
3
4
5
6
7
8
9 10
1
2
3
4
5
6
7
8
9 10
Junction box
L
2 3
1 2 3
L N
2
HTG
ON
L N
DHW
ON
Programmer
2
3
N
Boiler
Pump
NOTES: Control terminal numbering may differ from those shown.
Refer to instructions with controls selected.
A double pole isolating switch must be installed in the mains supply.
All earth connections must be connected back to the mains earth supply.
Fig. 10: Schematic Wiring Diagram - 3 port mid position valve system. ( ‘Y’ plan ) N.B. Must be used in conjunction
with 2 port zone valve supplied
Cylinder terminal block
2
1
3
3
3 Port Zone valve
Zone valve (DHW)
(supplied)
G W Bl 0 GY
G Br Bl 0
2
3
L
(Supply)
N
1
2
3
4
5
6
7
8
9 10
1
2
3
4
5
6
7
8
9 10
1 2 3
L N
2
HTG
ON
DHW
ON
Programmer
2
1
DHW
OFF
1
3
2
Room stat
L
2 3
L N
Boiler
Junction box
2
N
3
Pump
NOTES: Control terminal numbering may differ from those shown.
Refer to instructions with controls selected.
A double pole isolating switch must be installed in the mains supply.
All earth connections must be connected back to the mains earth supply.
13
Commissioning
Filling The Unit With Water
Ensure that all fittings and immersion heaters are
correctly fitted and tightened. An immersion heater key
is provided to aid tightening the immersion heater(s)
• Check expansion vessel pre-charge pressure The
vessel is supplied precharged to 0.35MPa (3.5
bar) to match the control pressure of the pressure
reducing valve. The precharge pressure is checked
using a car tyre gauge by unscrewing the plastic
cap opposite the water connection.
• Check all connections for tightness including the
immersion heater(s). An immersion heater key
spanner is supplied for this purpose.
• Ensure the drain cock is CLOSED.
• Open a hot tap furthest from the cylinder.
• Open the mains stop cock to fill the unit. When water
flows from the tap, allow to run for a few minutes to
thoroughly flush through any residue, dirt or swarf,
then close the tap.
• Open successive hot taps to purge the system of
air.
System Checks
• Check all water connections for leaks and rectify
as necessary.
• Turn off mains water supply.
• Remove the pressure reducing valve head work to
access the strainer mesh, clean and re-fit.
• Turn mains water supply on.
• Manually open, for a few seconds, each relief valve
in turn, checking that water is discharged and runs
freely through the tundish and out at the discharge
point.
• Ensure that the valve(s) reseat satisfactorily.
Direct Units
Switch on electrical supply to the immersion heater(s)
and allow the cylinder to heat up to normal working
temperature (60°C recommended). If necessary
the temperature can be adjusted by inserting a flat
bladed screwdriver in the adjustment knob on front
of the immersion heater thermostat and rotating. The
adjustment represents a temperature range of 10°C
to 72°C. Check the operation of thermostat(s) and
that no water has issued from the expansion relief
valve or temperature/pressure relief valve during the
heating cycle.
Indirect Units
Fill the indirect (primary) circuit following the boiler
manufacturer’s commissioning instructions. To ensure
the cylinder primary heat exchanger is filled, the 2
port motorised valve (supplied) should be manually
opened by moving the lever on the motor housing to
the MANUAL setting. When the primary circuit is full
return the lever to the AUTOMATIC position.
14
Switch on the boiler, ensure the programmer is set to
Domestic Hot Water and allow the cylinder to heat up to
a normal working temperature 60oC (recommended),.
If necessary the temperature can be adjusted by
inserting a flat bladed screwdriver in the adjustment
knob and rotating. The minimum thermostat setting is
10°C. Adjustment represents a temperature range of
10°C to 72°C. Fig. 11, below.
Check the operation of the indirect thermostat, and 2
port motorised valve, and that no water has emitted
from the expansion relief valve or temperature/pressure
relief valve during the heating cycle.
Benchmark Log Book
On completion of the installation and commissioning
procedures detailed in this manual the Benchmark
Installation, Commissioning and Service Record Log,
pages 20 and 21 should be completed and signed off
by the competent installer or commissioning engineer
in the relevant sections. The various system features,
location of system controls, user instructions and what
to do in the event of a system failure should be explained
to the customer. The customer should then countersign
the BenchmarkTM Commissioning Checklist (page 20)
to accept completion. The service record should be
filled in when any subsequent service or maintenance
operation is carried out on the product.
Fig. 11: Temperature Adjustment Details
THERMAL CUT-OUT RESET BUTTON
TEMPERATURE ADJUSTING
SPINDLE
SPINDLE POSITIONS
= MINIMUM TEMP 10ºC
= MAXIMUM TEMP 72ºC
= APPROX 60 °C
ROTATE SPINDLE CLOCKWISE
FOR TEMPERATURE INCREASE
AND COUNTER CLOCKWISE
FOR TEMPERATURE DECREASE
Maintenance
Maintenance Requirements
Unvented hot water systems have a continuing
maintenance requirement in order to ensure safe
working and optimum performance. It is essential
that the relief valve(s) are periodically inspected and
manually opened to ensure no blockage has occurred
in the valves or discharge pipework.
Similarly cleaning of the strainer element and
replacement of the air in the expansion vessel will help
to prevent possible operational faults.
The maintenance checks described below should be
performed by a competent person on a regular basis,
e.g. annually to coincide with boiler maintenance.
After any maintenance, please complete the relevant
Service Interval Record section of the Benchmark
Checklist on page 20 of this document.
Inspection
The immersion heater boss can be used as an access
for inspecting the cylinder internally.
Safety Valve Operation
Manually operate the temperature/pressure relief
valve for a few seconds. Check water is discharged
and that it flows freely through the tundish and
discharge pipework. Check valve reseats correctly
when released.
NOTE: Water discharged may be very hot!
Repeat the above procedure for the expansion relief
valve.
Strainer
Turn off the cold water supply, boiler and immersion
heaters. The lowest hot water tap should then be
opened to de-pressurise the system. Remove the
pressure reducing cartridge to access the strainer
mesh. Wash any particulate matter from the strainer
under clean water. Re-assemble ensuring the seal
is correctly fitted. DO NOT use any other type of
sealant.
Descaling Immersion Heater
Before removing the immersion heater the unit must be
drained. Before draining ensure the water, electrical
supply and boiler are OFF. Attach a hosepipe to the
drain cock having sufficient length to take water to a
suitable discharge point below the level of the unit.
Open a hot tap close to the unit and open drain cock to
drain unit. Remove the cover to the immersion heater
housing and disconnect wiring from immersion heater.
Carefully remove the thermostat capillaries. Note. the
order of the capillaries within the pocket. Remove the
terminal shroud.
If necessary the temperature can be adjusted by
inserting a flat bladed screwdriver in the adjustment
knob on front of the immersion heater thermostat and
rotating. The adjustment represents a temperature
range of 10°C to 72°C. Check the operation of
thermostat(s) and that no water has issued from the
expansion relief valve or temperature/pressure relief
valve during the heating cycle.
Indirect Units
Switch OFF electrical supply to the immersion heater
before removing the cover. Open the cover to the
immersion heater housing and disconnect wiring from
immersion heater. Carefully remove the thermostat
capillaries. Remove the terminal shroud. Unscrew
immersion heater backnut and remove immersion
heater from the unit. A key spanner is supplied with
the cylinder unit for easy removal/tightening of the
immersion heater. Over time the immersion heater
gasket may become stuck to the mating surface. To
break the seal insert a round bladed screwdriver into
one of the pockets on the immersion heater and gently
lever up and down.
Carefully remove any scale from the surface of the
element. DO NOT use a sharp implement as damage
to the element surface could be caused. Ensure sealing
surfaces are clean and seals are undamaged, if in
doubt fit a new gasket (part number 95 611 822).
Replace immersion heater ensuring the (right angled)
element hangs vertically downwards towards the base
of the unit. It may be helpful to support the immersion
heater using a round bladed screwdriver inserted
into one of the thermostat pockets whilst the backnut
is tightened. Replace the terminal shroud. Replace
thermostat capillaries into pockets. Connect wiring
to element. Check, and close and secure immersion
heater housing cover.
Expansion Vessel Charge Pressure
While system is de-pressurised check expansion
vessel charge pressure. Remove the dust cap on
top of the vessel. Check the charge pressure using
a tyre pressure gauge. The pressure (with system depressurised) should be 0.35MPa (3.5 bar). If it is lower
than the required setting it should be re-charged using
a tyre pump (Schrader valve type). DO NOT OVERCHARGE. Re-check the pressure and when correct
replace the dust cap.
Re-Commissioning
Check all electrical and plumbing connections are
secure. Close the drain cock. DO NOT switch on
the immersion heater(s) or boiler while the unit
is empty. With a hot tap open, turn on the cold water
supply and allow unit to refill. When water flows from the
hot tap allow to flow for a short while to purge air and
flush through any disturbed particles. Close hot tap and
then open successive hot taps in system to purge any
air. When completely full and purged check system for
leaks. Replace and secure immersion heater housing
cover. The heating source (immersion heater or boiler)
can then be switched on.
15
User Instructions
Warnings
I F W AT E R D I S C H A R G E S F R O M T H E
TEMPERATURE/PRESSURE RELIEF VALVE ON
CYLINDER SHUT DOWN THE BOILER. DO NOT
TURN OFF ANY WATER SUPPLY. CONTACT
A COMPETENT INSTALLER FOR UNVENTED
WATER HEATERS TO CHECK THE SYSTEM.
DO NOT TAMPER WITH ANY OF THE SAFETY
VALVES FITTED TO THE SYSTEM. IF A FAULT IS
SUSPECTED CONTACT A COMPETENT INSTALLER.
Benchmark
The cylinder is covered by the Benchmark Scheme
which aims to improve the standards of installation
and commissioning of domestic heating and hot water
systems in the UK and to encourage regular servicing
to optimise safety, efficiency and performance.
Benchmark is managed and promoted by the Heating
and Hotwater Industry Council. For more information
visit www.centralheating.co.uk.
Please ensure that the installer has fully completed the
Benchmark Checklist (pages 20 & 21) of this manual
and that you have signed it to say that you have
received a full and clear explanation of its operation. The
installer is legally required to complete a commissioning
checklist as a means of complying with the appropriate
Building Regulations (England & Wales).
All installations must be notified to Local Area
Building Control either directly or through a
Competent Persons Scheme. A Building Regulations
Compliance Certificate will then be issued to the
customer who should, on receipt, write the
Notification Number on the Benchmark Checklist.
This product should be serviced regularly to optimise
its safety, efficiency and performance. The service
engineer should complete the relevant Service Record
on the Benchmark Checklist after each service.
The Benchmark Checklist may be required in the event
of any warranty work.
Flow Performance
When initially opening hot outlets a small surge in
flow may be noticed as pressures stabilise. This is
quite normal with unvented systems. In some areas
cloudiness may be noticed in the hot water. This is
due to aeration of the water, is quite normal and will
quickly clear.
16
Temperature Controls – Direct Units Immersion
Heater(S)
A combined adjustable thermostat and thermal cut-out
is provided for each immersion heater. The thermostat
is factory set to give a water storage temperature of
approx. 55°C to 60°C. Access to the thermostat can
be made by opening the immersion heater cover DISCONNECT THE ELECTRICAL SUPPLY BEFORE
OPENING THE COVER(S). Temperature adjustment
is made by inserting a flat bladed screwdriver in the
slot on the adjustment disc on top of the thermostat
and rotating. The adjustment represents a temperature
range of 10°C to 72°C (60°C recommended) (Fig.
11, page 14). If in any doubt contact a competent
electrician.
DO NOT bypass the thermal cut-out(s) in any
circumstances.
Temperature Controls - Indirect Units
The cylinder units are fitted with an indirect thermostat
and thermal cut-out. These controls must be wired in
series with the 2 port motorised zone valve supplied
to interrupt the flow of primary water around the
heat exchanger coil when the control temperature
has been reached. The controls are located within
the lower terminal housing along with the immersion
heater thermostat. The thermostat is factory set to
give a water storage temperature of approx. 55°C
to 60°C. Access to the thermostat can be made by
opening the terminal housing cover - DISCONNECT
THE ELECTRICAL SUPPLY BEFORE OPENING THE
COVER. Temperature adjustment is made by inserting
a flat bladed screwdriver in the adjustment knob and
rotating. The minimum thermostat setting is 10°C. The
adjustment represents a temperature range of 10°C
to 72°C (Fig. 11, page 14) . If in any doubt contact a
competent electrician.
An immersion heater is also provided for use should
the indirect heat source be shut down for any purpose.
The immersion heater control temperature is set using
the immersion heater thermostat.
DO NOT bypass the thermal cut-out(s) in any
circumstances.
Operational Faults
Operational faults and their possible causes are
detailed in the Fault Finding section of this book. It
is recommended that faults should be checked by a
competent installer.
The air volume within the expansion vessel will
periodically require recharging to ensure expanded
water is accommodated within the unit. A discharge of
water INTERMITTENTLY from the expansion valve will
indicate the air volume has reduced to a point where it
can no longer accommodate the expansion.
Fault Finding & Servicing
Important
• After servicing, complete the relevant Service
Interval Record section of the Benchmark Checklist
located on pages 20 and 21 of this document.
• Servicing should only be carried out by competent
persons in the installation and maintenance of
unvented water heating systems.
• Any spare parts used MUST be authorised parts.
• Disconnect the electrical supply before removing
any electrical equipment covers.
• NEVER bypass any thermal controls or operate
system without the necessary safety valves.
• Water contained in the cylinder may be very hot,
especially following a thermal control failure. Caution
must be taken when drawing water from the unit.
Spare Parts
A full range of spare parts are available for the
cylinder range (Table 05, page 18). Refer to the
technical data label on the unit to identify the model
installed and ensure the correct part is ordered. You
will need to quote the serial number, which is printed
on the data label.
Fault Finding
The fault finding chart (Table 04, below) will enable
operational faults to be identified and their possible
causes rectified. Any work carried out on the unvented
water heater and its associated controls MUST be
carried out by a competent installer for unvented water
heating systems. In case of doubt contact service
support (see contact details on back page).
Warning
DO NOT TAMPER WITH ANY OF THE SAFETY
VALVES OR CONTROLS SUPPLIED WITH THE
CYLINDER AS THIS WILL INVALIDATE ANY
GUARANTEE.
Table 04: Fault Finding Chart
Fault
No hot water flow
Possible Cause
Remedy
Mains supply off
Check and open stop cock
Strainer blocked
Turn off water supply. Remove strainer and
clean
Cold water combination valve incorrectly Check and refit as required
fitted
Direct immersion heater not switched on Check and switch on
Water from hot tap
is cold
Water discharges
from expansion
valve
Water discharges
from T&P relief
valve
Milky water
Direct immersion heater thermal cut-out
has operated
Check, reset by pushing button on thermostat
Indirect programmer set to central heating only
Check, set to domestic hot water programme
Indirect boiler not working
Check boiler operation. If fault is suspected
consult boiler manufacturer’s instructions
Indirect thermal cut-out has operated
Check, reset by pushing button on thermostat
Check operation of indirect thermostat
Indirect motorised valve not connected
correctly
Check wiring and/or plumbing connections to
motorised valve
INTERMITTENTLY
Expansion vessel charge pressure has
reduced below 3.5 bar, or set to high
See maintenance section for re-charging of
expansion vessel procedure
CONTINUALLY
Cold water combination valve pressure
reducer not working correctly.
Expansion valve seat damaged
Check pressure from cold water combination
valve. If greater than 3.5 bar replace pressure
reducing valve
Remove expansion valve cartridge, check
condition of seat. If necessary fit new expansion
valve
Thermal control failure
NOTE: water will be very hot
Switch off power to immersion heater(s) and
shut down boiler
DO NOT turn off water supply. When discharge
stops check all thermal controls, replace if faulty
Oxygenated water
Water from a pressurised system releases
oxygen bubbles when flowing. The milkiness will
disappear after a short while
17
Fig. 12: Indirect Cylinder Spares
Spares
Table 05: Spares
Item
Description
Number
18
Part Number
1
Immersion heater ( lower )
95 606 984
2
Immersion heater (upper)
95 606 986
3
Immersion heater gasket
95 611 822
4
Immersion heater backnut
95 607 869
5
Immersion heater key
spanner
95 607 861
6
Tundish
95 605 838
7
Cold water combination
valve complete
95 605 897
8
Temperature/pressure relief
valve
95 605 810
9
Expansion vessel - 12 litre
(120 & 150 litre models)
95 607 863
10
Expansion vessel - 18 litre
(170 & 210 litre models)
95 607 864
11
Expansion vessel - 24 litre
(250 & 300 litre models)
95 607 612
12
Nut & olive pack (4 of each)
95 607 838
13
Terminal cover
95 614 305
14
Accessory kit (direct and
without expansion vessel)
95 607 969
15
Blanking plate assembly
95 605 881
16
Direct combined thermostat
and thermal cut-out
95 612 717
17
Indirect combined
thermostat and thermal
cut-out
95 612 716
18
Motorised valve 2 port
95 605 049
19
6 way terminal block
95 607 933
20
3 way terminal block
95 607 932
21
Accessory kit (indirect and
without expansion vessel)
95 607 968
22
Terminal shroud
95 606 993
11
18
4
16
20 19 23
3
26
1
4
16
Fig. 13: Direct Cylinder Spares
11
19
24
3
2
26
19
24
4
3
1
16
26
4
16
Heat Loss
Environmental
Table 06: Standing heat losses (based on an ambient
air temperature of 20°C and a stored water temperature
of 65°C)
Nominal
Capacity
(Litres)
Standing Heat Loss
per day
(kWh/24h)
per year
(kWh/365d)
120
1.25
456
150
1.45
529
170
1.63
595
210
1.91
697
250
2.22
810
300
2.52
920
Direct
Supplier’s name or trade mark
Supplier’s model identifier
Storage volume V in litres
Mixed water at 40 °C V40 in litres
The declared load profile
The water heating energy efficiency class of the model
The water heating energy efficiency in %
The annual electricity consumption in kWh
Daily fuel consumption Q fuel in kWh
The thermostat temperature settings of the water heater,
as placed on the market by the supplier
Specific precautions that shall be taken when the water
heater is assembled, installed or maintained and disposed
of at end of life
Indirect
Model(s)
Energy efficiency class
Standing loss in W
Storage volume V in litres
Products are manufactured from many recyclable
materials. At the end of their useful life they should be
disposed of at a Local Authority Recycling Centre in
order to realise the full environmental benefits.
Insulation is by means of an approved CFC/HCFC
free polyurethane foam with an ozone depletion factor
of zero.
120
120.0
180
M
C
36.0
1424
6.680
150
150.0
234
L
C
37.3
2741
12.730
Main
170
210
170.0
210.0
265
332
L
XL
C
C
37.1
38.1
2759
4395
12.840
20.300
250
250.0
395
XL
D
36.9
4538
20.790
300
300.0
464
XL
D
36.6
4573
21.350
250L
D
93.0
250.0
300L
D
105.0
300.0
60°C
See page 5 to 19
120L
B
52.0
120.0
150L
C
60.0
150.0
170L
C
68.0
170.0
210L
C
80.0
210.0
Table: Technical parameters in accordance with European Commission regulations 814/2013 and 812/2013
19
MAINS PRESSURE HOT WATER STORAGE SYSTEM COMMISSIONING CHECKLIST
This Commissioning Checklist is to be completed in full by the competent person who commissioned the storage system as a means of
demonstrating compliance with the appropriate Building Regulations and then handed to the customer to keep for future reference.
Failure to install and commission this equipment to the manufacturer’s instructions may invalidate the warranty but does not affect statutory rights.
Customer name:
Telephone number:
Address:
Cylinder Make and Model
Cylinder Serial Number
Commissioned by (PRINT NAME):
Registered Operative ID Number
Company name:
Telephone number:
Company address:
Commissioning date:
ALL SYSTEMS PRIMARY SETTINGS (indirect heating only)
Is the primary circuit a sealed or open vented system?
Sealed
Open
°C
ALL SYSTEMS
What is the incoming static cold water pressure at the inlet to the system?
bar
Yes
Is the installation in a hard water area (above 200ppm)?
No
Yes
No
Yes
No
What is the hot water thermostat set temperature?
°C
I/min
Yes
Type of control system (if applicable)
Y Plan
Is the cylinder solar (or other renewable) compatible?
S Plan
Other
Yes
What is the hot water temperature at the nearest outlet?
No
°C
All appropriate pipes have been insulated up to 1 metre or the point where they become concealed
Yes
UNVENTED SYSTEMS ONLY
What is the pressure reducing valve setting?
bar
Yes
The tundish and discharge pipework have been connected and terminated to Part G of the Building Regulations
Has the expansion vessel or internal air space been checked?
No
Yes
Yes
No
Yes
No
THERMAL STORES ONLY
What store temperature is achievable?
°C
What is the maximum hot water temperature?
°C
ALL INSTALLATIONS
The hot water system complies with the appropriate Building Regulations
Yes
The system has been installed and commissioned in accordance with the manufacturer’s instructions
Yes
The system controls have been demonstrated to and understood by the customer
Yes
The manufacturer’s literature, including Benchmark Checklist and Service Record, has been explained and left with the customer
Yes
Commissioning Engineer’s Signature
Customer’s Signature
*
© Heating and Hotwater Industry Council (HHIC)
20
www.centralheating.co.uk
SERVICE RECORD
It is recommended that your hot water system is serviced regularly and that the appropriate Service Record is completed.
Service Provider
Before completing the appropriate Service Record below, please ensure you have carried out the service as described in the manufacturer’s instructions.
SERVICE 01
Date:
SERVICE 02
Engineer name:
Engineer name:
Company name:
Company name:
Telephone No:
Telephone No:
Email Address:
Email Address:
Comments:
Comments:
Signature
Signature
SERVICE 03
Date:
SERVICE 04
Engineer name:
Engineer name:
Company name:
Company name:
Telephone No:
Telephone No:
Email Address:
Email Address:
Comments:
Comments:
Signature
Signature
SERVICE 05
Date:
SERVICE 06
Engineer name:
Engineer name:
Company name:
Company name:
Telephone No:
Telephone No:
Email Address:
Email Address:
Comments:
Comments:
Signature
Signature
SERVICE 07
Date:
SERVICE 08
Engineer name:
Engineer name:
Company name:
Company name:
Telephone No:
Telephone No:
Email Address:
Email Address:
Comments:
Comments:
Signature
Signature
SERVICE 09
Date:
SERVICE 10
Engineer name:
Engineer name:
Company name:
Company name:
Telephone No:
Telephone No:
Email Address:
Email Address:
Comments:
Comments:
Signature
Signature
Date:
Date:
Date:
Date:
Date:
21
Notes
22
Notes
23
Guarantee
On site service support including parts and labour for 12 months from date of installation.
After the initial 12 months, a guarantee will apply for a further 24 years for the stainless steel
inner vessel only. During this 24 year period, in the event of a cylinder leak, a replacement
product will be issued provided that the replacement is carried out by one of our heateam
engineers, for which reasonable labour charges will apply.
The guarantee is valid provided that:
•
•
•
•
•
•
•
•
•
•
It has been correctly installed as per the instructions contained in the instruction
manual and all relevant Codes of Practice and Regulations in force at the time
of installation.
The Benchmark Checklist has been completed upon commissioning and the
Benchmark Service Record is completed for each service.
It has not been modified in any way other than by MAIN.
It has not been frost damaged.
It has only been used for the storage of potable water.
It has not been tampered with or been subjected to misuse or neglect.
The fault is not scale related.
Within 60 days of installation the user completes and returns the certificate
supplied along with the proof of purchase to register the product.
It has been installed in the United Kingdom.
The fault is not caused by high chloride levels in the water supply or incorrect
disinfection methods.
Evidence of purchase and date of supply may be required. The guarantee is
transferable. This guarantee does not affect your statutory rights.
Technical Support & Spares
For all technical support and replacement parts issues please contact:
MAIN
Brooks House,
Coventry Road,
Warwick,
CV34 4LL
Tel: 0344 871 1532
The policy of MAIN is one of continuous product development and, as such, we reserve the right to
change specifications and guarantee terms and conditions without notice.
36005994_issue_09
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