Inspection/Maintenance
6 720 805 339 (2014/09)
21
7
Inspection/Maintenance
7.1
Recommendations for users
▶ Arrange a maintenance and inspection contract with a competent
person. Have the heating appliance and the DHW cylinder serviced
annually.
7.2
Maintenance and repair
▶ Only use genuine spare parts!
7.2.1
Draining the cylinder
To drain either the domestic water system or the cylinder:
▶ Ensure all connected heat source(s) and the electrical immersion
heater are isolated to prevent damage occurring as a result of heating
the cylinder while it is drained down.
▶ Isolate the cold water supply.
▶ Open all hot water draw off points.
▶ Attach a hose to the drain valve. The drain valve installed at the cold
water supply inlet to the cylinder must be used where practicable.
▶ Drain the cylinder.
▶
IMPORTANT
after draining the cylinder do not close the hot water
draw off points until the cylinder has fully cooled. Failure to observe
this instruction may result in damage to the cylinder that is not
covered by the guarantee.
7.2.2
Descaling / cleaning
In hard water areas
The level of scale build-up depends on the time in use, the operating
temperature and the water hardness. Scaled-up internal indirect coils
reduce the water content, lower the heat-up output, increase the energy
consumption and extend the heat-up time.
▶ Subject to the level of scaling, descale the cylinder regularly.
When water hardness is over 450 ppm water treatement has to be
considered (or annual service with descaling)
In soft water areas
▶ Check the inside of the cylinder regularly and clean out any sludge.
7.2.3
Immersion heater
If the thermal cut-out operates contact a competent installer to
investigate and identify the cause of the fault. If the fault re-occurs after
this investigation the immersion heater will need to be replaced.
When refitting an immersion heater, ensure the O-ring is positioned
correctly on the head of the immersion heater and lubricate before
fitting. Fit it by hand until almost home then tighten gently as the O-rings
will seal easily.
7.2.4
Re-commissioning
▶ Flush the cylinder thoroughly after cleaning or repair.
▶ Vent the heating, solar and DHW sides.
8
Spare parts list
9
The Guarantee
The Greenstore stainless steel cylinder carries a fully transferable 25
year guarantee against faulty material or manufacture subject to Terms
& Conditions. To read the full Terms & Conditions please visit us online
at www.worcester-bosch.co.uk/guarantee. The Guarantee Registration
form is available on this same page and can be completed and submitted
electronically. Alternatively please telephone one of our Guarantee
Registration advisors on 0330 123 2552. Your statutory rights are not
affected by the manufacturers guarantee.
CAUTION:
A safety valve malfunction can result in
excessive pressure levels.
▶ Check the function of the expansion relief anti-vac
valve in the cold water inlet control group and the
temperature and pressure relief valve, and flush
several times by cracking them open.
DANGER:
Risk of electric shock!
▶ Ensure all electrical supplies are isolated before
carrying out any maintenance on the cylinder.
NOTICE:
▶ When draining either the domestic water system or
the cylinder ensure the cold water supply is isolated
and that all hot water draw off points are opened. The
drain valve installed at the cold water supply inlet to
the cylinder should be used, where practicable.
TT no.
Designation
8-716-113-407-0 High flow rate inlet control set (pressure reducing
valve, strainer and expansion relief anti-vac
valve) Series 535001 until 01/2013
8-716-850-617-0 High flow rate inlet control set (pressure reducing
valve, strainer and expansion relief anti-vac
valve) Series 533002 after 01/2013
8-716-113-408-0 Temperature and pressure relief valve 7 bar
8-716-113-409-0 Tundish (22mm x 15mm)
8-716-113-410-0 2 port valve
8-716-113-411-0 Dual thermostat
8-716-113-412-0 Immersion heater (same on all models)
8-716-850-607-0 12 litre expansion vessel (TC-150)
8-716-113-416-0 18 litre expansion vessel (TC-180,TC-210 &
TC-250)
8-716-113-418-0 25 litre expansion vessel (TC-300)
8-716-113-522-0 Solar high limit thermostat
8-716-842-371-0 Connection set
8-716-113-414-0 Expansion vessel hose ( 3/4" M x 3/4" F ) until
03/2015
8-716-841-952-0 6 bar expansion relief anti-vac valve until 01/
2013
8-716-850-618-0 6 bar expansion relief anti-vac valve after 01/
2013
8-716-850-608-0 Instruction manual
Table 9
