Centerstore Solar Cylinder Guide

Centerstore Solar Cylinder Guide
Solar
UNVENTED MAINS PRESSURE SOLAR WATER HEATERS
190, 210, 250 and 300 LITRE CAPACITY INDIRECT MODELS
INSTALLATION AND SERVICING INSTRUCTIONS
PACK CONTENTS
The CENTERSTORE Solar unvented solar cylinder water heater incorporating immersion heater(s) and thermal
controls Factory fitted temperature/pressure relief valve l Cold water combination valve assembly l Expansion
vessel and mounting bracket l Tundish l Motorised valve l Compression nuts and olives l Immersion heater spanner
l Installation instructions
IMPORTANT: PLEASE READ AND UNDERSTAND ALL THESE INSTRUCTIONS
BEFORE COMMENCING INSTALLATION. PLEASE LEAVE THIS MANUAL WITH
THE CUSTOMER FOR FUTURE REFERENCE.
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. 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.
IMPORTANT NOTE TO USER: PLEASE REFER TO THE USER INSTRUCTIONS SECTION ON PAGES 14 AND 15 FOR
IMPORTANT INFORMATION WITH RESPECT TO THE BENCHMARK SCHEME
INTRODUCTION
The CENTERSTORE Solar cylinder is a purpose designed unvented solar 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
corrosion proofed steel sheet. All products are insulated with CFC/HCFC free polyurethane foam to meet the
latest European heat loss requirements (see Table 6).
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.
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1
Contents
PAGE
INTRODUCTION.................................................................1
GENERAL REQUIREMENTS.............................................3
INSTALLATION-GENERAL...............................................4
INSTALLATION - SOLAR PRIMARY...............................9
INSTALLATION - AUXILLARY HEATING COIL...........10
COMMISSIONING.............................................................12
MAINTENANCE..................................................................13
USER INSTRUCTIONS.......................................................14
FAULT FINDING AND SERVICING.................................15
OTHER INFORMATION.....................................................17
ENVIRONMENTAL INFORMATION...............................17
COMMISSIONING CHECK LIST......................................18
SERVICE RECORD..............................................................19
GUARANTEE.......................................................................20
TECHNICAL SUPPORT AND SPARES...........................20
2
IMPORTANT: THIS APPLIANCE IS NOT INTENDED
FOR THE USE BY PERSONS (INCLUDING CHILDREN)
WITH REDUCED PHYSICAL, SENSORY OR MENTAL
CAPABILITIES, OR LACK OF KNOWLEDGE AND EXPERIENCE, UNLESS THEY HAVE BEEN GIVEN SUPERVISION OR INSTRUCTION CONCERNING THE USE OF
THE APPLIANCE BY A PERSON RESPONSIBLE FOR
THEIR SAFETY. CHILDREN MUST BE SUPERVISED.
GENERAL REQUIREMENTS
SITING THE UNIT
The CENTERSTORE Solar must be installed vertically.
Although location is not critical, the following points
should be considered:
•
The CENTERSTORE Solar 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 pipework
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 to provide 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. 1).
•
Ensure that the floor area for the CENTERSTORE
Solar cylinder is level and capable of permanently supporting the weight when full of water.
(See Table 1).
WALL
Min 250mm
Fig. 1: Siting the Unit
Nominal Weight of
capacity
unit full
Model
(kg)
reference (litres)
INDIRECT SCS190I
190
240
SCS210I
210
264
SCS250I
250
308
SCS300I
300
367
Table 1: Unit weights
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
Type
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 1.5 bar pressure and 20 litres per minute flow
rate. 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 CENTERSTORE Solar cylinder has an operating pressure of 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 16 bar.
OUTLET/TERMINAL FITTINGS (TAPS, ETC.)
The CENTERSTORE Solar 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 pressure
cold water connection should be placed between the
2 pieces of the cold water combination valve assembly
(see Fig. 2). Outlets situated higher than the CENTERSTORE Solar 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.
LIMITATIONS
The CENTERSTORE Solar 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.
OPERATIONAL SUMMARY
Maximum mains pressure
Operating pressure
Expansion vessel charge pressure
Expansion relief valve setting
T&P relief valve setting
Maximum primary circuit pressure
(auxillary coil)
Maximum primary circuit pressure
Storage capacity
Weight when full
16 bar
3.5 bar
3.5 bar
6 bar
90°C/10 bar
3 bar
6 bar (solar coil)
See Table 1
See Table 1
3
3
IMPORTANT NOTE:
CENTERSTORE SOLAR 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.
INSTALLATION - GENERAL
(FIGS 4 & 6)
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 CENTERSTORE
Solar cylinder and its associated controls to be isolated
and serviced.
COLD WATER COMBINATION VALVE ASSEMBLY (FIG 2)
The 2-piece cold water combination valve assembly
can be located anywhere on the cold water mains
supply prior to the expansion vessel (see Fig. 6) but the
two pieces do not have to be installed together. The
pressure reducing valve incorporates the pressure
reducer & strainer and the expansion valve incorporates the expansion & check valves. Ensure that the
valves are installed in the correct order and orientation.
No other valves should be placed between the expansion valve and the CENTERSTORE Solar unit. A connection can be made between the expansion and pressure reducing valves to provide a balanced cold water
connection. The expansion valve connection must not
be used for any other purpose.
DRAIN TAP
A suitable draining tap should be installed in the
cold water supply to the CENTERSTORE Solar cylinder
unit between the expansion valve (see Fig. 6) 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).
EXPANSION VESSEL
The expansion vessel accommodates expansion that
results from heating the water inside the unit. The
expansion vessel is pre-charged at 3.5 bar. The expansion vessel must be connected between the expansion valve (see Fig. 2) and the CENTERSTORE Solar
cylinder (see Fig. 6). 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.
NOTE: DO NOT USE THE POTABLE WATER EXPANSION VESSEL SUPPLIED WITH THE CENTERSTORE
SOLAR CYLINDER FOR ANY OTHER PURPOSE. IT
IS NOT SUITABLE FOR USE ON A SOLAR PRIMARY
CIRCUIT.
SECONDARY CIRCULATION
If secondary circulation is required it is recommended
that it be connected to the CENTERSTORE Solar cylinder
as shown in Fig. 3. 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)
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.
Fig. 2: Cold water combination valve assembly
4
A
29
Fig. 3: Secondary circulation connection
B
C
594
D
E
Ø550
433
370
412
81
°
20
25°
30°
45°
Fig. 4: General dimensions
NOMINAL
CAPACITY
(litres)
190
210
250
300
DIMENSIONS (mm)
A
B
1372 732
1473 1009
1731 1160
2038 1438
C
D
803 923
925 1095
1072 1258
1243 1573
E
1019
1184
1391
1715
AUXILLARY COIL
SOLAR AUXILLARY SURFACE RATING RECOVERY
AREA
(kW)
(mins)
SURFACE VOLUME
(m2)
(litres)
AREA (m2)
0.61
22
11.9
120
1.1
0.68
18.3
17
1.1
120
19
0.79
20.0
145
1.1
20.0
175
22
1.1
0.79
NOTES:
1. Recovery time based on heating 70% of auxillary volume through 45°C
2. Direct heating times assume use of lower element only and auxillary cylinder volume being heated.
Table 2: Dimensions and performance
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5
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 3.9 are
reproduced in the following sections of this manual.
Information Sheet No. 33 available from the British
Board of Agrément gives further advice on discharge
pipe installation. For discharge pipe arrangements not
covered by G3 Guidance or BBA Info Sheet No.33
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.
The 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.”
G3 GUIDANCE SECTION 3.9
The discharge pipe (D1) [see fig. 5 in this instruction book] from the vessel up to and including
the tundish is generally supplied by the manufacturer of the hot water storage system. Where
otherwise, the installation should include the
discharge pipe(s) (D1) from the safety device(s).
In either case the tundish should be vertical,
located in the same space as the unvented hot
water storage system and be fitted as close as
possible and within 500mm of the safety device
e.g. the temperature relief valve.
The discharge pipe (D2) from the tundish should
terminate in a safe place where there is no risk
to persons in the vicinity of the discharge, preferably be of metal and:
a. 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. discharge pipes
between 9m and 18m 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. Refer to Table
3, Table 1 and the worked example [see Table 3
and Fig. 5 in this instruction book].
An alternative approach for sizing discharge
pipes would be to follow BS 6700:1987 Specification for design installation, testing and maintenance of services supplying water for domestic
6
use within buildings and their curtilages, Appendix E, section E2 and table 21.
b. have a vertical section of pipe at least 300mm
long, below the tundish before any elbows or
bends in the pipework.
c. be installed with a continuous fall and in a
frost free environment.
d. have discharges visible at both the tundish
and the final point of discharge but where this
is not possible or is practically difficult there
should be clear visibility at one or other of these
locations. Examples of acceptable discharge
arrangements are:
i. ideally below a fixed grating and above the
water seal in a trapped gully.
ii. 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 where children
may play or otherwise come into contact with
discharges a wire cage or similar guard is positioned to prevent contact, whilst maintaining
visibility.
iii. discharges at high level; e.g. into a metal
hopper and metal down pipe with the end
of the discharge pipe clearly visible (tundish
visible or not) or onto a roof capable of
withstanding high temperature discharges
of water and 3m from any plastics guttering
system that would collect such discharges
(tundish visible).
iv. where a single pipe serves a number of
discharges, such as in blocks of flats, the
number served should be limited to not
more than 6 systems so that any installation
discharging can be traced reasonably easily.
The single common discharge pipe should be
at least one pipe size larger than the largest
individual discharge pipe (D2) to be connected. If unvented hot water storage systems
are installed where discharges from safety
devices may not be apparent i.e. in dwellings
occupied by blind, infirm or disabled people,
consideration should be given to the installation of an electronically operated device to
warn when discharge takes place.
Note: The discharge will consist of scalding
water and steam. Asphalt, roofing felt and
non-metallic rainwater goods may be
damaged by such discharges.
Worked example of discharge pipe sizing
Fig. 5 is for 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 3:
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
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 to the mains water supply to the
CENTERSTORE Solar 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.
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
G1/2
15mm
G3/4
22mm
G1
28mm
Maximum
resistance
Resistance
Minimum size of allowed, expressed
created by each
discharge pipe
as a length of
elbow or bend
D2 from tundish straight pipe (i.e.
no elbows or
bends)
22mm
28mm
35mm
28mm
35mm
42mm
35mm
42mm
54mm
up to 9m
up to 18m
up to 27m
up to 9m
up to 18m
up to 27m
up to 9m
up to 18m
up to 27m
0.8m
1.0m
1.4m
1.0m
1.4m
1.7m
1.4m
1.7m
2.3m
Table 3: 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
500mm maximum
Tundish
300mm
minimum
Discharge pipe (D2) from tundish,
with continuous fall. See Building
Regulation G3 section 3.9d i-iv,
Table 4 and worked example
Discharge below
fixed grating
(Building Regulation
G3 section 3.9d gives
alternative points
of discharge)
Fixed grating
Trapped
gully
Fig.5: Typical discharge pipe arrangement (extract from Building Regulation G3 Guidance section)
7
7
BALANCED
COLD WATER
SECONDARY RETURN TAPPING T&P RELIEF EXPANSION CONNECTION
VESSEL (IF REQUIRED)
VALVE
(IF REQUIRED)
COLD WATER
COMBINATION
VALVE
(2-PIECE)
MAINS
WATER
SUPPLY
TO HOT
OUTLETS
BOOST ELEMENT/
AUX. CONTROL
HOUSING
AUX. PRIMARY
RETURN
ISOLATING
VALVE (NOT
SUPPLIED)
AUX. PRIMARY
FLOW
SOLAR PRIMARY
RETURN
TUNDISH
SOLAR PRIMARY
FLOW
DRAIN COCK
SOLAR INLET
(NOT SUPPLIED)
CONTROLS
HOUSING
Fig. 6: Typical installation - schematic
AUXILLARY HEATING CONTROL
Fig.7 Electrical Connections (Schematic)
8
DISCHARGE
PIPE
INSTALLATION - SOLAR PRIMARY
CONNECTION TO SOLAR PRIMARY CIRCUIT
The lower (solar) coil of the CENTERSTORE Solar
cylinder must be connected to a fully pumped solar
primary circuit. The connections are suitable for 22mm
copper pipe direct to the compression fittings provided. The connections are also threaded 3/4” BSP male
parallel should BSP be required.
The solar primary circuit should have its own dedicated
circulating pump and safety controls which must be
installed as per the manufacturer’s instructions.
CONTROL OF SOLAR PRIMARY CIRCUIT
Temperature control of the CENTERSTORE Solar cylinder must be carried out using a suitable proprietory
Solar Controller/Programmer. The cylinder temperature sensing probe (supplied with the solar controller)
should be fully inserted into the pocket provided on
the CENTERSTORE Solar cylinder and its cable secured
using the cable clamps on the controls housing ( see
Fig. 8 ).
Connection to the solar controller should be in accordance with manufacture’s instructions. The solar controller should be programmed to give a cylinder temperature of approximately 60°C ( maximum 70°C ).
Fig. 8: Solar Control Connections
The solar controller and solar primary circulation
pump must be wired via the over-temperature cut-out
mounted in the lower solar controls housing (see Fig.
8). This will ensure that the heat input to the solar coil
is interrupted in the event of the cylinder over-heating.
There must also be suitable check (non-return) valves
installed in the solar primary flow and return to prevent the possibility of any thermo-syphoning if the
solar circulation is stopped.
9
9
INSTALLATION - AUXILLARY
HEATING COIL
PLUMBING CONNECTIONS
CENTERSTOER Solar 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 auxillary primary circuit.
Primary connections are 22mm compression. However,
3/4”BSP parallel threaded fittings can be fitted to the
primary coil connections if required.
ELECTRICAL SUPPLY (FIG. 7)
All units are fitted with a 3kW immersion heater and a
combined thermostat and thermal cut-out to control
the primary heating source. The CENTERSTORE Solar
cylinder MUST be earthed.
All wiring to the unit must be installed in accordance
with the latest IEE Wiring Regulations and the supply circuits must be protected by a suitable fuse and double
pole isolating switch with a contact separation of at
least 3mm in both poles. All connections are made to
the terminal block located under the terminal cover
mounted on the side of the unit. The supply cable(s)
must be routed through the cable grip(s) in the terminal housing.
DISCONNECT FROM MAINS SUPPLY BEFORE
REMOVING ANY COVERS. Never attempt to replace
the immersion heater(s) other than with the recommended CENTERSTORE immersion heater(s).
DO NOT BYPASS THE THERMAL CUT-OUTS 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.
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 CENTERSTORE Solar cylinder should not
exceed 2.5m.
AUXILLARY PRIMARY CIRCUIT CONTROL
The 2-port motorised valve supplied with the CENTERSTORE Solar cylinder MUST be fitted to the primary
auxillary circuit flow to the CENTERSTORE Solar cylinder
heat exchanger and wired in series with the indirect
thermostat and thermal cut-out fitted to the unit.
Primary circulation to the CENTERSTORE Solar cylinder
heat exchangers must be pumped; gravity circulation
WILL NOT WORK.
10
SPACE AND HEATING SYSTEMS CONTROLS
The controls provided with the CENTERSTORE
Solar 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. (See Fig. 7)
The CENTERSTORE Solar cylinder is compatible
with most heating controls, examples of electrical
circuits are shown in Figs. 9 and 10. However,
other systems may be suitable, refer to the
controls manufacturers’ instructions, supplied
with the controls selected, for alternative system
wiring schemes.
Fig. 9: Schematic wiring diagram - Basic 2 x 2 port valve system
Fig.10: Schematic wiring diagram - 3 port mid position valve system. N.B. Must be used in conjunction with 2 port
zone valve supplied
11
11
COMMISSIONING
At the time of commissioning, please ensure all relevant
sections of the Benchmark Checklist, located on Page 18
and 19 of this document, are completed.
FILLING THE UNIT WITH WATER
• Check expansion vessel pre-charge pressure.
The vessel is supplied pre-charged to 3.5 bar to
match the control pressure of the pressure reducing valve.The pre-charge 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 CENTERSTORE
Solar 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.
SECONDARY HEATING COIL
Fill the indirect secondary circuit following the boiler
manufacturer’s commissioning instructions. To ensure the CENTERSTORE Solar cylinder auxillary heat
exchanger is filled, the 2 port motorised valve (supplied) should be manually opened by moving the lever
on the motor housing to the FLUSHING ONLY setting.
When the circuit is full return the lever to the MANUAL
position. Switch on the boiler, ensure the programmer
is set to Domestic Hot Water and allow the CENTERSTORE Solar cylinder to heat up to a normal working
temperature (60oC recommended, approximately
graduation 4 on the thermostat). If necessary the
temperature can be adjusted by inserting a flat bladed
screwdriver in the adjustment knob (located on top
of the thermostat mounting bracket - see Fig.11) and
rotating. The minimum thermostat setting is 10oC. The
adjustment range 1 to 5 represents a temperature
range of 30 to 70oC. Check the operation of the indirect
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.
SYSTEM CHECKS
• Check all water connections for leaks and rectify
as necessary.
• Turn off mains water supply.
• Remove the pressure reducing valve headwork
to access the strainer mesh; clean and re-fit.
• 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.
SOLAR PRIMARY CIRCUIT
Fill the solar primary circuit following the instructions provided with the solar hydraulic controls. The
cylinder temperature control probe supplied with the
solar controller must be fully inserted into the pocket
in the lower controls housing and the cable securely
clamped. Heating by the solar primary circuit is
controlled by the solar controller; refer to the manufacturer’s installation instructions for details of how to
set up and connect the solar primary circuit. The solar
controller should be programmed to give a maximum storage temperature in the CENTERSTORE Solar
cylinder of 70oC, (60oC is recommended to minimise
scaling).
12
Fig. 11: Indirect thermostat and thermal cut-out
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 installer 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 located on Page 19 of this document.
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 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 valve 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(S)
Before removing the immersion heater(s) the unit
must be drained. Ensure the water, electrical supply,
boiler and solar primary circuit are OFF before
draining. 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).
Remove the thermostat by carefully pulling outwards
from the immersion heater. Remove thermostat capillary sensors from the pockets on the immersion heater.
Unscrew immersion heater backnut(s) and remove
immersion heater from the unit. A key spanner is supplied with the CENTERSTORE Solar cylinder for easy
removal/tightening of the immersion heater(s). 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(s). 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(s) 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 thermostat capillaries into pocket.
Replace the immersion heater thermostat by carefully
plugging the two male spade terminations on the underside of the thermostat head into the corresponding
terminations on the element. Rewire, check, close and
secure immersion heater housing cover(s).
13
13
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 de-pressurised) should be 3.5bar.
If it is lower than the required setting it should be recharged using a tyre pump (Schrader valve type). DO
NOT OVER CHARGE. 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. 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), boiler
or solar primary circuit) can then be switched on.
USER INSTRUCTIONS
WARNINGS
IF WATER ISSUES FROM THE TEMPERATURE/PRESSURE RELIEF VALVE ON THE CENTERSTORE SOLAR
CYLINDER SWITCH OFF ELECTRICAL SUPPLY TO THE
IMMERSION HEATER(S), SHUT DOWN THE BOILER
AND SHUT DOWN THE SOLAR PRIMARY CIRCUIT.
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 CENTERSTORE SOLAR SYSTEM. IF
A FAULT IS SUSPECTED CONTACT A COMPETENT
INSTALLER.
BENCHMARK
CENTERSTORE, is a licensed member of 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 on Page 18 of this manual and
that you have signed it to say that you have received
a full and clear explanation of its operation.
14
The installer is legally required to complete a commissioning checklist as a means of complying with
the appropriate Building Regulations (England and
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 and as supporting
documentation relating to home improvements in the
optional documents section of the Home Improvements Pack.
TEMPERATURE CONTROLS - SOLAR
Temperature control of the solar primary coil is by
means of solar differential temperature controller.
This will usually have been set during commissioning
to give a storage temperature of approximately 60oC.
Refer to user instructions supplied with the controller
for details of how to adjust this if required.
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.
TEMPERATURE CONTROLS – (Fig. 7)
The CENTERSTORE Solar cylinders 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 upper white terminal housing along with
the immersion heater thermostat. The thermostat temperature adjustment is made by inserting a flat bladed
screwdriver in the adjustment knob and rotating. The
minimum thermostat setting is 10oC. The adjustment
range 1 to 5 represents a temperature range of 30 to
70oC (60oC will be approximately position 4). 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, see User Instructions
section for details.
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.
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 AND SERVICING
IMPORTANT
• After servicing, complete the relevant
Service Interval Record section of the Benchmark Checklist located on page 18 and 19 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 CENTERSTORE 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 CENTERSTORE Solar
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
CENTERSTORE cylinder range (See Table 4). 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
and the guarantee code, which are printed on the
data label.
1
D e s c r ip t io n
Imme r s io n h e a t e r
P a r t No .
95 606 961
2
3
4
5
6
7
Imme r s io n
Imme r s io n
Imme r s io n
T u n d is h
E x p a n s io n
E x p a n s io n
95
95
95
95
95
95
8
C o ld w a t e r c o mb in a t io n v a lv e
c o mp le t e
95 605 047
9
C o ld w a t e r c o mb in a t io n v a lv e b o d y
95 605 048
P r e s s u r e r e d u c in g v a lv e c a r t r id g e
3.5bar
T e mp e r a t u r e /P r e s s u r e R e lie f V a lv e
In d ir e c t t h e r mo s t a t
95 607 029
95 605 810
95 612 697
In d ir e c t t h e r ma l c u t -o u t
95 612 698
M o t o r is e d v a lv e 2 p o r t
T e r min a l cover
95
95
95
95
10
11
12
13
14
15
16
17
18
19
h e a t e r g a s ke t
h e a t e r b a c kn u t
h e a t e r ke y s p a n n e r
v a lv e c a r t r id g e - 6 b a r
v a lv e c o mp le t e - 6 b a r
4 W a y t e r min a l b lo c k
Combined thermostat and
thermal cut out
A c c e s s o r y kit (in d ir e c t a n d w it h o u t
e x p a n s io n v e s s e l)
Blanking Plate Assembly
611
607
607
605
605
607
605
614
607
612
822
869
861
838
864
030
049
094
902
026
95 607 968
95 607 064
Table 4: Spares
15
15
11
1
2
Fig 12: Spares Diagram
16
3
15
17
16
13
2
16
12
13
19
3
15
FAULT FINDING
The Fault Finding chart ( Table 5 ) will enable operational faults to be identified and their possible causes rectified. Any work carried out on the CENTERSTORE Solar
cylinder 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).
FA ULT
WARNING
DO NOT TAMPER WITH ANY OF THE SAFETY VALVES
OR CONTROLS SUPPLIED WITH THE CENTERSTORE
SOLAR CYLINDER AS THIS WILL INVALIDATE ANY
GUARANTEE
POS S IBLE CA US E
1. Mains supply off.
2. Strainer blocked.
REMEDY
1. Check and open stop cock.
2. Turn off water supply. Remove strainer
and clean (see Maintenance section).
3. Cold Water Combination Valve
incorrectly fitted.
3. Check and refit as required.
1. INDIRECT programmer set to
Central Heating only.
2. INDIRECT boiler not working.
1. Check. Set to a Domestic Hot Water
programme.
2. Check boiler operation. If fault is
suspected consult boiler manufacturer's
instructions.
3. Check. Reset by pushing button on cutout. Check operation of indirect
thermostat.
4. Check wiring and/or plumbing
connections to motorised valve (see Fig. 9).
No hot water flow
Water from hot taps is cold
3. INDIRECT thermal cut-out has
operated.
4. INDIRECT motorised valve not
connected correctly.
1. INTERMITTENTLY
Expansion Vessel charge pressure 1. See Maintenance section for re-charging
has reduced below 3.5bar.
procedure.
Water discharges from
Expansion Valve
2. CONTINUALLY
a. Cold Water Combination Valve
Pressure Reducer not working
correctly.
Water discharges from T&P
Relief Valve
b. Expansion Valve seat damaged. 2b. Remove Expansion Valve cartridge.
Check condition of seat. If necessary fit
new Expansion Valve cartridge.
1. Thermal control failure NOTE
1. Switch off power to immersion heater(s)
water will be very hot.
and shut down boiler. DO NOT turn off
water supply. When discharge stops check
all thermal controls, replace if faulty.
1. Oxygenated water.
1. Water from a pressurised system releases
oxygen bubbles when flowing. The
milkiness will disappear after a short while.
Milky water
2a. Check pressure from Cold Water
Combination Valve. If greater than 3.5bar
replace Pressure Reducer cartridge.
Table 5: Fault Finding Chart
ENVIRONMENTAL INFORMATION
OTHER INFORMATION
Nominal
Capacity
(litres)
190
210
250
300
Standing Heat Loss
per day
(kWh/24h)
1.65
1.75
1.98
2.33
per year
(kWh/365d)
642
664
670
850
CENTERSTORE 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.
Table 6: Standing heat losses (based on an ambient air
temperature of 20oC and a stored water temperature
of 65oC)
While the following Checklist can be used for any installation covered by its description, only appliances manufactured by Scheme Members will be covered by the rules and requirements of the Benchmark Scheme.
17
17
18
19
19
GUARANTEE
The CENTERSTORE Solar stainless steel vessel carries a full 25 year parts guarantee against
faulty manufacture or materials 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 CENTERSTORE.
• 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 expansion vessel is guaranteed for a period of 2 years from the date of purchase. The
CENTERSTORE Solar’s components, immersion heater and thermal controls are guaranteed
for a period of 2 years from the date of purchase. Evidence of purchase and date of supply
may be required. The unit is not guaranteed against damage due to frost. The guarantee is
transferable. This guarantee does not affect your statutory rights.
TECHNICAL SUPPORT & SPARES
For all technical support, replacement parts and service issues please
contact:
CENTERSTORE
Brooks House,
Coventry Road,
Warwick,
CV34 4LL
Tel: 0844 871 1532
The policy of CENTERSTORE is one of continuous product development and, as such, we reserve the right to
change specifications without notice.
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36006052 issue 4
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