Technical data

13
STRAINER
Turn off the cold water supply, boiler and immersion
heaters. The lowest hot water tap should then be
opened to de-pressurise the system. Remove the
pressure reducing cartridge to access the strainer
mesh. Wash any particulate matter from the strainer
under clean water. Re-assemble ensuring the seal
is correctly fi tted. 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 sup-
ply and boiler are OFF before draining. Attach a
hosepipe to the drain cock having suffi cient 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 thermostat by carefully pulling
outwards. 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 cylinder unit 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 fi t a new gasket
(part number 95 611 822).
Replace immersion heater(s) ensuring the lower
(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 im-
mersion heater thermostat by carefully plugging
the two male spade terminations on the underside
of the thermostat head into the corresponding ter-
minations on the element. Rewire, check, close and
secure immersion heater housing cover(s).
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 3.5 bar.
If it is lower than the required setting it should be
re-charged 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
refi ll. DO NOT switch on the immersion heater(s) or
boiler until the unit is full. When water fl ows from
the hot tap allow to fl ow for a short while to purge
air and fl ush 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.
USER INSTRUCTIONS
WARNINGS
IF WATER ISSUES FROM THE TEMPERATURE/
PRESSURE RELIEF VALVE ON THE CENTERSTORE
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 CENTERSTORE 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, effi ciency 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 17 and 18 of this
manual and that you have signed it to say that you
have received a full and clear explanation of its opera-
tion. 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 notifi ed to Local Area
Building Control either directly or through a
Competent Persons Scheme. A Building Regulations
Compliance Certifi cate will then be issued to the
customer who should, on receipt, write the
Notifi cation Number on the Benchmark Checklist.
This product should be serviced regularly to