Remeha Commercial Solar
commercial
Installation Manual
Unvented Solar Water Heaters
Installation & Servicing Instructions
IMPORTANT
Please read & understand all these instructions before commencing installation.
Please leave this manual with the customer for future reference.
Contents
1. Introduction............................................................................................3
1.1 General................................................................................................3
1.2 Symbols used......................................................................................3
1.3 Abbreviations.......................................................................................3
1.4 Liabilities..............................................................................................3
2. Safety.......................................................................................................4
2.1 General safety warnings......................................................................4
2.2 Recommendations..............................................................................4
2.3 Specific safety instructions..................................................................4
3. Technical specifications........................................................................5
3.1 Technical data.....................................................................................5
3.2 ErP data..............................................................................................6
3.3 Dimensions and connections..............................................................7
3.4 Electrical diagram(s)............................................................................8
4. Description of the product..................................................................10
4.1 General description...........................................................................10
4.2 Operation principle............................................................................10
4.3 Main components..............................................................................10
4.4 Standard delivery..............................................................................10
5. Before installation................................................................................12
5.1 Installation regulations.......................................................................12
5.2 Installation requirements...................................................................12
5.3 Choice of location..............................................................................12
5.4 Transport...........................................................................................13
6. Installation............................................................................................13
6.1 General..............................................................................................13
6.2 Water connections.............................................................................13
6.3 Electrical connections........................................................................18
6.4 Filling the installation.........................................................................18
7. Commissioning....................................................................................19
7.1 General..............................................................................................19
7.2 Checklist before commissioning........................................................19
7.3 Commissioning procedure.................................................................19
8. Operation..............................................................................................20
8.1 General..............................................................................................20
9. Maintenance..........................................................................................21
9.1 General..............................................................................................21
9.2 Standard inspection & maintenance operations................................21
10. Troubleshooting.................................................................................23
10.1 Fault finding.....................................................................................23
11. Decommissioning...............................................................................24
11.1 Decommissioning procedure...........................................................24
12. Spare parts..........................................................................................24
12.1 Spare parts list................................................................................24
12.2 Accessories.....................................................................................25
Benchmark checklist...............................................................................30
Service records........................................................................................31
Guarantee..................................................................................................32
2
1. Introduction
1.1 General
In the interest of UK customers, we are continuously
endeavouring to make improvements in product
quality. All the specifications stated in this document
are therefore subject to change without notice.
The following instructions are offered as a guide to the
user and installer.
Our liability as the manufacturer may not be invoked in
the following cases:
The installation must be carried out by a competent
plumbing and electrical installer in accordance with
Building Regulation G3 (England and Wales), Technical
Standard P3 (Scotland) or Building Regulation P5
(Northern Ireland) and the Water Fitting Regulations
(England and Wales) or Water Byelaws (Scotland).
`` Failure to abide by the instructions on using the
appliance.
`` Faulty or insufficient maintenance of the
appliance.
`` Failure to abide by the instructions on installing the
product.
1.2 Symbols used
In these instructions, various risk levels are employed
to draw the user’s attention to particular information. In
doing so we wish to safeguard the user, avoid hazards
and guarantee the correct operation of the appliance.
The installer is responsible for the installation and the
commissioning of the appliance. The installer must
respect the following instructions:
Risk of dangerous situation causing slight
physical injury.
`` Read and follow the instructions given in the
manuals provided with the appliance.
`` Carry out installation in compliance with the
prevailing legislation and standards.
`` Perform the initial start up and carry out any checks
necessary.
`` Complete the commissioning checklist.
`` Explain the installation to the user.
`` If maintenance is necessary, warn the user of the
obligation to check the appliance and maintain it in
good working order.
`` Give all the instruction manuals to the user.
CAUTION
Users liability
Risk of material damage.
To guarantee optimum operation of the appliance, the
user must respect the following instructions:
DANGER
Risk of a dangerous situation causing serious
physical injury.
WARNING

Installer's liability
Signals important information.
1.3 Abbreviations
`` T&P - Temperature & Pressure relief valve
`` PRV - Pressure Reducing Valve
`` Prv - Pressure relief valve
1.4 Liabilities
Manufacturers liability
Our products are manufactured in compliance with
the requirements of the various applicable European
Directives.
This appliance complies with the requirements of the
CE marking directive.
`` Read and follow the instructions given in the
manuals provided with the appliance.
`` Call on qualified professionals to carry out
installation and initial start up.
`` Get your fitter to explain your installation to you.
`` Have your required checks and services done.
`` Keep the instruction manuals in good condition and
close to the appliance.
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 supervison 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.
3
2. Safety
2.1 General safety warnings
DANGER
This cylinder is unvented and as such becomes
pressurised when in operation. The combination
of pressurisation and hot water could lead to
serious physical injury if the safety instructions
in this manual are not adhered to.
WARNING
`` Only competent persons
having
received
adequate
training
are
permitted to work on the appliance and
the installation.
`` Do not tamper with any of the safety
valves or controls supplied with the
cylinder.
`` Before any work, switch off the mains
supply to the appliance.
`` Do not switch on if there is a possibility
that the water in the cylinder is frozen.
CAUTION
Do not operate immersion heaters until the
cylinder has been filled with water.
2.2 Recommendations
WARNING
When handling the unit, take appropriate
precautions for the weight of the unit. Weights
can be found in section 3, table 1 , page 5.
CAUTION
Annual maintenance is recommended by a
competent person.
4
2.3 Specific safety instructions
WARNING
`` If water discharges from the
temperature/pressure relief valve on
the 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.
`` DO NOT bypass the thermal cut-out(s)
in any circumstances.
3. Technical specifications
400 solar
500 solar
800 solar
1000 solar
1250 solar
1450 solar
2000 solar
2500 solar
3.1 Technical data
Max direct kW rating
24
24
45
45
54
54
54
54
Direct heat time (based on max kW rating in
mins)
52
66
56
70
73
84
117
146
Solar coil surface area m2
2
3
5
7.5
Auxiliary coil surface area m2
1
1.5
2.5
5
Solar coil rating (kW)
Auxiliary coil rating (kW)
Solar coil heat time (mins)
Pressure drop through solar coil
(Mpa)
15 l/min
29.4
28.7
31.3
32.9
35.0
30.1
40.2
37.5
30 l/min
43.6
41.8
52.7
51.4
63.6
61.2
98.4
86.4
60l/miin
59.7
55.8
76.9
76.5
97.9
91.7
132.2 126.4
15 l/min
28.4
27.2
30.5
33.2
48.6
46.4
97.9
91.7
15 l/min
43
55
80
91
112
130
180
225
30 l/min
29
38
48
59
62
72
99
124
60l/miin
21
28
32
39
40
50
48
62
15 l/min
0.002
30 l/min
0.004
0.008
0.006
0.007
60l/miin
0.032
0.044
0.025
0.03
0.001
Heat loss (kWh in 24h)
1.72
2.14
2.74
3.33
3.60
4.17
4.30
4.50
Hot water capacity (volume of water drawn off
>40°C)
384
482
776
961
1206 1399
1930
2482
505
610
964
1188
1569 1872
2445
2950
105
110
164
188
319
445
450
Weight full (kg)
Weight empty (kg)
322
Max supply pressure
1.6 MPa (16 bar)
Max design pressure
0.8 MPa (8 bar)
Max operating pressure
0.6 MPa (6 bar)
Max expansion vessel charge pressure
1.0 MPa (10 bar)
Expansion relief valve setting
0.8 MPa (8 bar)
T&P valve setting
1 Mpa (10 bar), 90-95°C
Maximum primary pressure
0.3 MPa (3 bar)
Table 1:
Technical data
Notes:
1. Cylinders tested in conformance with BS EN 12897:2006.
2. Heat up time from cold through 45°C, based on a flow temperature of 80°C +/- 2°C & normal volume.
5
DY5436
400





500





800








1000








1250









1450









2000









2500









Table 2:
Lower
Upper
DY4527
Lower
Upper
DY3627
Lower
Upper
DY3027
Lower
Upper
DY2416
Solar
Lower
54
Upper
45
Lower
DY1816
36
Upper
DY1216
30
Lower
24
Upper
DY0916
18
Lower
12
Upper
DY0616
9
Lower
6
Upper
Kw
Location
Element
Element allocation table
Element allocation table
Note: This table shows what elements can be fitted to each cylinder size.
3.2 ErP data
Solar
Supplier’s name or trade mark
Model(s)
Storage volume V in litres
Standing loss in W
The water heating energy
6
400
400.0
72.0
B
500
500.0
89.0
C
Remeha Commercial
800
1000
1250
1450
2000
800.0 1000.0 1250.0 1450.0 2000.0
114.0 139.0 150.0 163.0 179.0
C
C
C
C
C
N
O
H
G
I
F
E
J
D
K
C
L
M
B
A
3.3 Dimensions and connections
35°
40°
30°
45°
Figure 1: General dimensions - Solar
Item Connection
A
NA
B
1/2"BSP
C
1" BSP
D
1" BSP
E
1/2" BSP
F
1" BSP
G
1" BSP
H
1" BSP
I
1/2" BSP
J
N/A
K
1/2" BSP
L
1" BSP
M
N/A
N
N/A
O
N/A
Table 3:
400I
1500
1090
870
670
630
498
323
309
524
950
894
980
1083
956
872
500I
1800
1390
898
698
650
498
323
309
524
1004
959
1070
1383
956
872
Connection
N/A
1/2" BSP
1 1/4" BSP
1 1/4" BSP
1/2" BSP
1 1/4" BSP
1 1/4" BSP
1 1/4" BSP
1/2" BSP
N/A
800I
1906
1502
997
797
774
622
447
440
601
1428
1" BSP
N/A
N/A
N/A
1187
1490
1107
1024
1000I Connection 1250I
2301
N/A
1937
1897
1/2" BSP
1419
997
1 1/2" BSP 1140
797
1 1/2" BSP
910
747
1/2" BSP
835
622
1 1/2" BSP
710
447
N/A
530
440
1 1/2" BSP
530
601
1/2" BSP
695
1811
N/A
1371
N/A
1437
1" BSP
1176
1885
N/A
1407
1107
N/A
1308
1024
N/A
1224
1450I Connection 2000I
2253
N/A
2011
1735
1/2" BSP
1423
1137 1 1/2" BSP 1230
907
1 1/2" BSP
990
835
1/2" BSP
905
710
1 1/2" BSP
780
530
1 1/2" BSP
600
530
2" BSP
607
695
1/2" BSP
778
1371
N/A
1376
2500I
2416
1829
1230
990
733
780
601
607
778
1780
1376
1723
1308
1224
1476
1817
1560
1476
1" BSP
N/A
N/A
N/A
1226
1412
1560
1476
General dimensions table - Solar
7
3.4 Electrical diagram(s)
WARNING
The high limit stat must always operate the zone valve in case of overtemperature.
Thermostat Option 1
High Limit
Control
0
0
+C
o
+C
o
2
o
1
o
o
C
1
o
2
C
o
N
S/L
G Br Bl 0
L = Optional control utilising zone valve end
switch if required.
Figure 2: Wiring diagram 1
Zone valve
L
Switch out
Thermostat Option 2
Control
High Limit
0
0
+C
o
+C
o
2
o
1
C
o
o
1
o
2
C
S/L
(volt free)
o
o
o
N
L
Switch out
Remove link
L = Optional control utilising zone valve end
switch if required.
G Br Bl 0
Zone valve
L
Figure 2a: Wiring diagram 2 - volt free option
NOTE: Option 2 untilises control thermostat to provide volt free control circuit.
8
Switch out
Earth
Neutral
Live
Fuse
(not supplied)
1
A
Live
marked ‘L’
B
2
Neutral terminal
marked 'N'
2
2
Earth
1
Thermal cut-out
60
1 - 2 16A 240V ~
7
0
5
0
1
1 - 2 20A 240V ~
80
40
Temperature control
Live
Contactors
(not supplied)
Neutral
Cut-Out Temperature 80°C
(Factorey set)
Immersion Heater
Earth
Typical head layout for
a single phase heater
Note:
The 2 external contactors must be approved
components certified for 10,000 cycles of
operation for the contactor controlled by the
thermostat and at least 30 for the contactor
controlled by the non-self-resetting thermal
cut-out.
Figure 2: Single phase wiring schematic
Earth
Neutral
L1
L2
L3
Line terminal
marked L2
Fuse
(not supplied)
Line terminal
Line terminal
marked L1
marked L3
A
1
B
2
Earth
2
L1
L2
L3
1
Thermal cut-out
2
1 - 2 16A 240V ~
7
0
5
60
1
1 - 2 20A 240V ~
80
40
0
Temperature control
Contactors
(not supplied)
Earth
Neutral terminal
marked 'N'
Typical head layout for
a three phase heater
Neutral
Immersion Heater
Figure 3: 3 phase wiring schematic
9
Hot outlet
4. Description of the product
4.1 General description
This product 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 soft jacket. All products
are insulated with CFC free polyurethane foam to give
good heat loss protection.
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 should not be tampered with.
4.2 Operation principle
T&P
connection
Sensor pocket
Upper immersion
/ inspection hatch
Auxiliary flow
Auxiliary return
The unvented cylinder is used to heat and store hot
water for use in commercial applications.
Depending on the model the water can be heated
directly using an element (supplied separately) or
indirectly through a coil in the unit using an indirect heat
source.
To provide pressure to the tap or shower an unvented
unit uses the incoming mains water pressure. To do this
the cylinder is sealed and not vented. However, when
the volume of water is heated it expands and without
any room for expansion could cause the cylinder to
rupture and fail. To allow expansion of this heated
water it is important that an expansion vessel is used.
This vessel is pressurised and gives the heated water
room to expand.
4.3 Main components
See Figure 5: Main components on page 11
4.4 Standard delivery
The delivery includes:
`` Cylinder
`` Literature pack
`` Instructions (inc benchmark
checklist & service record)
commissioning
`` Cold water control pack
`` Expansion vessel
`` Combination valve (inc pressure reducing valve,
pressure relief valve and check valve)
`` Tundish
`` 2 port zone valve.
10
Secondary
return
Sensor
pocket
Solar flow
Solar return
Cold
inlet
Figure 4: Main components
Note: This is an indirect unit and shows the general
position of components but these will change depending
on the model.
5. Before installation
5.1 Installation regulations
WARNING
Installation of the appliance must be carried
out by a qualified engineer in accordance
with prevailing and national regulations as
listed below.
`` Building Regulations
`` The Building Standards (Scotland)
`` The Building Regulations (Northern
Ireland)
`` I.E.E Electrical Regs
`` UK Water Regulations
5.2 Installation requirements
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.

The solar cylinder must be incorporated into a fully
pumped solar primary circuit. Control of the solar
primary is achieved by the use of external controls not
supplied with the unit. Control must be via a purpose
designed solar hydraulic station and solar differential
temperature controller.
Water supply
In an unvented system the pressure and flowrate is
directly related to the incoming water supply. For this
reason it is recommended that the maximum water
demand is assessed and the water supply checked to
ensure this demand can be satisfactorily met.
`` We suggest the minimum supply requirements
should be 0.15MPa (1.5 bar) pressure and 100
litres per minute flow rate.
`` A 28mm cold water supply is recommended,
however, if a smaller supply exists, which provides
sufficient flow, this may be used (although more
flow noise may be experienced).
`` The higher the available pressure and flow rate the
better the system performance.
`` See table 1 on page 5 for cylinder operating
pressures. This is controlled by the cold water
combination valve assembly.
Outlet/terminal fittings (taps, etc.)
`` The cylinder can be used with most types of
terminal fittings.
`` 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 8 bar at 80°C.
5.3 Choice of location
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.
`` Ensure that the floor area for the cylinder is level
and capable of permanently supporting the weight
when full of water (see table 1, page 5 for weights).
Wall
Min 250mm
Min 250mm
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
Figure 5: Siting the unit
11
5.4 Transport
Prior to installation the unit should be stored and
transported in an area free from excessive damp or
humidity.
To aid installation, the water heater (800ltr upwards)
is provided with lifting points, located at the top of the
unit. To access the lifting eyes please remove the top
outlet grommet followed by the cylinder lid.
Figure 8: Lifting the unit
12
6. Installation
6.2 Water connections
6.1 General
WARNING
After reading the previous sections in this booklet, and
choosing a good location for the unit, please install,
paying attention to the following hydraulic, electrical
and commissioning sections.
`` 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.
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.
`` Can be a sealed system or open vented type maximum primary pressure 3 bar.
`` The boiler cannot be vented through the cylinder.
Refer to the installation schematic (fig 8, page 14) for
details on the pipework layout. Specific details for the
discharge pipework layout is also provided in figure 11.
`` All pipe fittings are made via BSP female pipe
connections directly to the unit.
`` 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
(not supplied).
`` The expansion vessel must be connected between
SECONDARY CIRCULATION
TYPICAL DE-STRATIFICATION
LOOP SYSTEM
Hot water outlet
Check Valve (not supplied)
Check valve
De-stratification pump
WRAS approved
pump
Secondary
return
Auxillary flow in
Auxillary flow out
Direction
of flow
Balanced cold
water connection
Pressure relief
valve
Pressure reducing
valve
Mains water
supply
Air vent at highest
point in system
(not supplied)
Tundish
Solar flow in
Solar flow out
Please note, that this is a typical installation and
other options are available.
Discharge
pipe
To Drain
Expansion
vessel
Figure 6: Typical installation schematic (not to scale)
13
the cold water combination valve and the cylinder.
`` The location of the expansion vessel should allow
access to recharge the pressure as and when
necessary.
`` A suitable draining tap should be installed in the
cold water supply to the cylinder between the
expansion valve 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).
Cold water control pack
CAUTION
Auxiliary circuit control
`` The expansion vessel pressure must
be set in accordance with the inlet
pressure set on the pressure reducing
valve.
`` 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 any warranty.
`` The cold water control pack can be connected
anywhere on the cold water cylinder supply prior to
the expansion vessel.
`` The control pack incorporates the strainer, check
valve, core unit and expansion releif valve.
`` The pressure settings are adjustable and should
be set between 1 & 6 bar.
8 bar Pressure
relief valve
`` The valve can be fitted in any orientation to suit
the installation as long as the valve is installed with
the direction of flow arrows pointing in the correct
direction.
`` The expansion relief valve should be installed with
the discharge pipework in either the horizontal
position or facing downwards.
`` No other valves should be placed between the cold
water combination valve and the cylinder.
`` The blank plastic plugs in the body of the pressure
relief valve are pressure gauge connections to
enable pressure monitoring to be carried out, should
the system develop a fault. It is recommended that
these be accessible (the pressure reducing valve
has two – only one need be accessible).
`` The 2 port motorised valve supplied with the
cylinder MUST be fitted on the auxiliary flow to the
cylinder heat exchanger and wired such that in the
event of the cylinder overheating it will close the
auxiliary circuit.
`` Auxiliary circulation to the cylinder heat exchanger
must be pumped; gravity circulation WILL NOT
WORK.
`` It is reccomended that an air bleed or automatic air
vent is incorporated in the primary return pipe work
close to the unit.
`` Boiler flow temperature should be set to 82°
(maximum flow temperature to auxiliary heat
exchanger 89°C).
Take note of flow
direction
3.5 bar Pressure
reducing valve
Take note of flow
direction
Pressure relief
discharge
Mains water in
To cylinder
Pressure gauge
connections (one
each side)
28mm compression connections
Figure 7: Cold water combination valve (400 & 500ltr)
14
Solar connections
Discharge
`` The lower (solar) coil must be connected to a
fully pumped solar primary circuit with its own
safety control which must be installed as per the
manufacturers instructions.
`` There must be suitable check vales installed in
the solar primary flow and return to prevent the
possibility of any thermo-syphoning if the solar
circulation is stopped.
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.
Secondary circulation
If secondary circulation is required it is recommended
that it be connected to the cylinder as shown (see fig.
10, below).
`` The secondary return pipe should be in 28mm 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: Plastic pipe capacities may be reduced due to
thicker wall sections.
De-stratification kits
The correct size of de-stratification kit must be used
with your cylinder to ensure the volume can be
circulateed in 1 hour. The pump instructions will need
to be reviewed for information on the correct setting.
Please follow the installation schematic below for
guidance. When the system circulates needs to be
specified by the installer to ensure water is not drawn
off during the de-stratification process. If a hot water
demand is required during this period cold water may
be discharged from the hot outlet. It is recommended
that a check valve be installed before the pump to stop
any rick of cold water draw off through the pump when
it is not in use.
For guidance on installation please refer to figure 6.
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 from 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
15
the valve outlet and the tundish (see fig 11).
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. 11); 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 Fig 11, Table 4 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.
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;
16
(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
polybutylene (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.
Worked example of discharge pipe sizing
Fig. 11: 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 4:
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.
Valve
Outlet Size
Minimum Size Of
Discharge Pipe
D1
Minimum Size Of
Discharge Pipe D2
From Tundish
Maximum Resistance
Allowed, Expressed As A
Length Of Straight Pipe
(I.E. No Elbows Or Bends)
Resistance
Created By Each
Elbow Or Bend
G1/2
15mm
22mm
28mm
35mm
up to 9m
up to 18m
up to 27m
0.8m
1.0m
1.4m
G3/4
22mm
28mm
35mm
42mm
up to 9m
up to 18m
up to 27m
1.0m
1.4m
1.7m
G1
28mm
35mm
42mm
54mm
up to 9m
up to 18m
up to 27m
1.4m
1.7m
2.3m
Table 4:
Sizing of copper discharge pipe (D2) for common temperature relief valve outlet sizes
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
Figure 8: Typical discharge pipe arrangement (extract from Building Regulation G3 Guidance Section 3.50)
17
6.3 Electrical connections
In case of difficulty contact service support; contact
details are available on page 36 of this booklet.
WARNING
`` 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. 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.
`` DO NOT operate the immersion heaters
until the cylinder has been filled with
water.
`` The immersion heater(s) should be wired in
accordance with fig's 4 and 5, page 11.
`` All immersion heaters are fitted with a thermostat
which is fitted in the centre of the heater plate and a
cut-out which is fitted to the side of the thermostat.
These MUST be wired in series with the operating
coil circuit of the contactor (not supplied).
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 will be necessary to
control the space heating requirements and times
that the system is required to function.
`` The cylinder is compatible with most heating
controls. Please refer to the controls manufacturers
instructions, supplied with the controls selected.
6.4 Filling the installation
`` Check expansion vessel pre-charge pressure.
The expansion vessel pressure must be set in
accordance with the inlet pressure set on the
pressure reducing valve.
`` 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.
18
Temperature control
clockwise to increase,
counter-clockwise to
decrease
7. Commissioning
7.1 General
After filling the installation with water in the previous
section please follow the following steps to complete
the installation of the unit.
0
30
50 40
DO NOT operate the immersion heaters or
primary circuit until the cylinder has been
filled with water.
°C 70 60
WARNING
7.2 Checklist before commissioning
`` 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 the water supply back 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.
7.3 Commissioning procedure
`` Fill the solar primary circuit following the instructions
provided with the solar hydraulic controls.
`` Heating of the solar coil is controlled by the solar
controller; refer to the manufacturer's instructions
for details.
`` The solar controller should be programmed to give
a cylinder temperature of approximately 65°C.
`` Fill the auxiliary circuit following the boiler
manufacturer’s commissioning instructions.
`` To ensure the cylinder auxiliary 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.
`` Switch on the boiler, ensure the programmer is set
to Hot Water and allow the cylinder to heat up to a
normal working temperature 65oC.
`` If necessary the temperature can be adjusted
as shown in Figure 13. The minimum thermostat
setting is 10°C.
`` Check the operation of the thermostat and 2 port
motorised valve, and that no water has issued from
the expansion relief valve or temperature/pressure
relief valve during the heating cycle.
Thermal cut-out
reset under cap
Figure 9: Indirect controls (auxiliary coil)
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 (page 34 & 35) 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.
19
8. Operation
8.1 General
WARNING
`` If water discharges from the
temperature/pressure relief valve on
the cylinder shut down the heat source.
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.
`` DO NOT bypass the thermal cut-out(s)
in any circumstances.
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.
Temperature controls
The cylinder units are fitted with a 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.
DO NOT bypass the thermal cut-out(s) in any
circumstances.

The solar cylinder must be incorporated into a fully
pumped solar primary circuit. Control of the solar
primary is achieved by the use of external controls not
supplied with the unit. Control must be via a purpose
designed solar hydraulic station and solar differential
temperature controller.
Operational faults
Operational faults and their possible causes are
detailed in the Fault Finding section (p.25) 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 system. 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.
20
9. Maintenance
9.1 General
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.
Descaling immersion heater(s)
`` Turn off the mains water supply, isolate the electrical
supply and turn off boiler
`` 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.
`` Open the cover(s) to the immersion heater
housing(s) and disconnect wiring from immersion
heater(s) thermostat(s).
`` Remove the 8 nuts and withdraw the immersion
heater. Take care when lifting the immersion heater
out of the cylinder and work within safe working
practices.
`` Carefully remove any scale from the surface of the
element(s).
CAUTION
After any maintenance, please complete the relevant
Service Interval Record section of the Benchmark
Checklist on page 35 of this document.
DO NOT use a sharp implement as damage
to the element surface could be caused.
The immersion heater boss can be used as an access
for inspecting the cylinder internally.
`` Ensure sealing surfaces are clean and seals are
undamaged, if in doubt fit a new gasket. (spare part
number 95611025)
`` Replace immersion heater(s) and make sure the
8 nuts are correctly torqued (20Nm or 14.75 ft/lbf)
`` Rewire, check, close and secure immersion heater
housing cover(s).
Safety valve operation
Expansion vessel charge pressure
9.2 Standard inspection & maintenance
operations
Inspection
CAUTION
Water discharged may be very hot!
`` 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.
`` Repeat the above procedure for the expansion
relief valve.
`` Remove the dust cap on top of the vessel.
`` De-pressurise the system by turning the mains
supply off and then opening a hot tap.
`` Check the charge pressure using a tyre pressure
gauge. The pressure must be set in accordance
with the inlet pressure set on the pressure reducing
valve.
`` If it is lower than the required setting it should be recharged using a tyre pump (Schrader valve type).
CAUTION
DO NOT OVER-CHARGE
Strainer
`` Turn off the isolating valve prior to the Pressure
Reducing Valve or the main stop cock to the
system.
`` Open the lowest hot tap in the system to relieve the
system pressure.
`` Using a spanner unscrew the pressure reducing
cartridge and remove the moulded housing. The
strainer will be removed with the cartridge.
`` Wash any particulate matter from the strainer
under clean running water.
`` Replace the strainer and screw the Pressure
Reducing Valve cartridge into the moulded housing.
`` Close hot tap, turn on isolating valve or main stop
cock to the system. Check for leaks.
``
Re-check the pressure and when correct replace
the dust cap.
21
Re-commissioning
`` Check all electrical and plumbing connections are
secure. Close the drain cock.
`` With a hot tap open, turn on the cold water supply
and allow unit to refill.
`` DO NOT switch on the immersion heater(s) or
boiler until the unit is full.
`` 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.
`` The heating source (immersion heater(s) or boiler)
can then be switched on.
22
10. Troubleshooting
WARNING
Do not tamper with any of the safety valves
or controls supplied with the cylinder as this
will invalidate any guarantee.
10.1 Fault finding
Important
`` After servicing, complete the relevant Service
Interval Record section of the Benchmark Checklist
located on pages 34 and 35 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.
Fault
Water discharges
from expansion
valve
Water discharges
from T&P relief
valve
Milky water
Table 5:
The fault finding chart (table 5, 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.
Spare Parts
A full range of spare parts are available for the
cylinder range (table 8, page 27). 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.
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
fitted
Check and refit as required
Direct immersion heater not switched on
Check and switch on
Direct immersion heater thermal cut-out
has operated
Check, reset by pushing button on thermostat
Programmer set to central heating only
Check, set to domestic hot water programme
Indirect heat source is not working
Check solar/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 too high
See Maintenance section (p.19) 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 cartridge.
Remove expansion valve cartridge, check
condition of seat. If necessary fit new expansion
valve
Thermal control failure
CAUTION: 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
No hot water flow
Water from hot tap
is cold
`` 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.
Fault finding chart
23
11. Decommissioning
11.1 Decommissioning procedure
``
``
``
``
``
``
Isolate electrical supplies and make safe
Isolate the water supply
Drain the cylinder
Drain the solar & auxiliary circuits
Remove cylinder
Cap pipework
Environmental information
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.
12. Spare parts
12.1 Spare parts list
A full range of spare parts are available for the cylinder range. Refer to the Technical Data label on the unit to identify
the model installed and ensure the correct part is ordered.
KEY
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
24
DESCRIPTION
IMMERSION HEATER GASKET
BLANKING PLATE KIT
EXPANSION VESSEL 60L 6 BAR
EXPANSION VESSEL 100L 6 BAR
EXPANSION VESSEL 150L 6 BAR
EXPANSION VESSEL 200L 6 BAR
EXPANSION VESSEL 300L 6 BAR
1” INTEGRATED INLET CONTROL VALVE
ISOLATING BALL VALVE 1”
ISOLATING BALL VALVE 1 1/4”
ISOLATING BALL VALVE 1 1/2”
ISOLATING BALL VALVE 2”
ISOLATING DRAIN VALVE 1”
TUNDISH (22mm - 28MM)
TUNDISH 1 1/2” X 2”
PRV 1 1/4” SET PRESSURE 1.5 TO 6 BAR MAX IP 16 BAR
PRV 1 1/2” SET PRESSURE 1.5 TO 6 BAR MAX IP 16 BAR
PRV 2” SET PRESSURE 1.5 TO 6 BAR MAX IP 16 BAR
SINGLE CHECK VALVE 1 1/4”
SINGLE CHECK VALVE 1 1/2”
SINGLE CHECK VALVE 2”
EXPANSION RELIEF VALVE 1” X 1 1/4” SET PRESSURE 8 BAR
EXPANSION RELIEF VALVE 1 1/4” X 1 1/2” SET PRESSURE 8 BAR
TEMPERATURE AND PRESSURE RELIEF VALVE - 3/4"
SPARES NUMBER
95611025
95607396
95607445
95607458
95607461
95612723
95612724
95605176
95605178
95605179
95605180
95605181
95605182
95607367
95607452
95605183
95605185
95605187
95605189
95605190
95605191
95605192
95605194
95605103
25
26
27
28
29
30
31
32
TEMPERATURE AND PRESSURE RELIEF VALVE - 1 1/4"
DUAL CONTROL THERMOSTAT
CUT-OUT THERMOSTAT
2 PORT MOTORISED VALVE (28mm)
2 PORT MOTORISED VALVE (DN 32)
2 PORT MOTORISED VALVE (DN 40)
1/2” BLANKING STAT POCKET
1” BLANKING STAT POCKET
95605196
95612650
95612652
95605884
95605198
95605199
95607690
95607691
ACCESSORY SPARES
33
34
35
36
37
38
39
40
41
42
11" ROD THERMOSTAT
11" RESETTABLE CUT-OUT
PUMP 3 SPEED CIRCULATION UP 20-30N
PUMP 3 SPEED CIRCULATION UPS 15-50N 130
28MM PUMP ISOLATING VALVE
2 PORT MOTORISED VALVE BODY DN32
2 PORT MOTORISED VALVE BODY DN40
ACTUATOR
32 CONNECTION
40 CONNECTION
95980025
95980009
95607366
95607404
95605177
7031586
7031587
7031588
7031595
7031596
Table 8: Spares
12.2 Accessories
Accessory
6kW Element Assembly
9kW Element Assembly
12kW Element Assembly
18kW Element Assembly
24kW Element Assembly
30kW Element Assembly
36kW Element Assembly
45kW Element Assembly
54kW Element Assembly
Destratification loop kit - 400-500 litre
Destratification loop kit - 800 - 1450 litre
Destratification loop kit - 2000 - 2500 litre
Temperature gauge
Pressure gauge
Part number
DY0616
DY0916
DY1216
DY1816
DY2416
DY3027
DY3627
DY4527
DY5436
95970140
95970157
95970158
95970141
95970142
Table 9: Accessories
25
1
Part No:
2
95:611:025
3-7
Part No:
See table
26
Part No:
95:605:176
13
See table
14
Part No:
95:607:396
8
9 - 12
Part No:
Part No:
Part No:
95:605:182
15
95:607:367
Part No:
95:607:425
16-18
Part No:
19 -20
See table
22-23
Part No:
95:605:192 & 95:605:194
Part No:
95:605:103
26
95:605:196
Part No:
95:612:650
28
27
Part No:
See table
24
25
Part No:
Part No:
95:612:652
Part No:
95:605:884
27
29-30
Part No:
31
7031564 & 7031565
32
Part No:
95:607:691
28
Part No:
95:980:025
35-36
95:980:009
37
Part No:
95:607:690
33
34
Part No:
Part No:
Part No:
95:607:366 & 95:607:404
38-39
95:605:177
Part No:
7031586 & 7031587
40
Part No:
41-42
7031564 & 7031565
Part No:
95:607:690
29
Benchmark checklist
30
Commissioning &
service records
31
Guarantee
Guarantee Terms
Remeha guarantees the water heater cylinder against faulty manufacture or materials for a period of two years from
the date of purchase including parts and labour. This two year guarantee is extended to five years for the cold water
control valve and to 25 years (from the date of installation) for the stainless steel inner vessel.
These guarantees are valid provided that:
`` The water heater has been installed by a competent engineer and as per the instructions contained in the
installation manual and all relevant Codes of Practice and Regulations in force at the time of installation.
`` Any disinfection has been carried out in accordance with BS EN 806
`` Should the factory fitted temperature and pressure relief valve be tampered with or removed your guarantee will
be invalidated.
`` The water heater has not been modified in anyway other than by Remeha approved engineers.
`` The water heater has only been used for the storage of wholesome sanitary water (max 250mg/l chloride).
`` Only stainless steel dummy plugs are to be used.
`` The water heater has not been subjected to excessive pressure beyond the guidelines detailed in the installation
instructions.
`` The water heater has not been subjected to frost, nor has it been tampered with or been subject to misuse or
neglect.
`` No factory fitted parts have been removed for unauthorised repair or replacement
`` Regular maintenance has been carried out by a competent person in accordance with the requirements set in the
maintenance section of the installation manual and any replacement parts used should be approved spare parts.
`` The guarantee is not valid outside of the United Kingdom.
The warranty does NOT cover:
Consequential damages or profit loss which may arise from a defect.
Warranty claims have no delaying effect on the payment dates and other demands
Your Remeha warranty covers you for a equivalent replacement and labour in the event that the unit fails prematurely
as a result of a proved manufacturing defect.
In order that this can be achieved, full access for removal and the replacement of the unit is essential. If it is found
that access can not be achieved the warranty will be limited to the replacement of the unit only and subsequent labour
charges would not be met under the warranty.
Remeha Commercial
T: 0118 978 3434
F: 0118 978 6977
E: [email protected]
32
36006248_issue_03
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