SERVICE AND SPARES
Greenstar i System Compact - 6 720 807 726 (2013/05)
37
6
SERVICE AND SPARES
• To ensure continued efficient operation the appliance must be
checked at regular intervals.
• The frequency of servicing will depend upon the particular installation
conditions and usage, however normally an annual service is
recommended.
• The extent of the service work required by the appliance is
determined by the operating condition of the appliance when tested
by qualified engineers.
• After each service, the service interval record sheet at the rear of this
manual, must be completed.
6.1
INSPECTION AND SERVICE
1. Check that the terminal and terminal guard, if fitted, are unobstructed
and undamaged.
2. If the appliance is in a compartment or cupboard, check that the
specified service space around the appliance is clear.
3. Check all joints and connections in the system and remake any that
show signs of leakage.
Refill and re-pressurise if applicable as described in the
commissioning section.
4. Operate the appliance and take note of any irregularities.
Refer to the fault finding pages for rectification procedure.
6.2
CHECKING THE GAS INLET PRESSURE
▶ Check that the gas working pressures in the system conform to the
figures shown below:
Fig. 67 Natural gas pressure
Fig. 68 L.P.G. pressure
CAUTION:
Mains supplies
▶ Turn off the gas supply and isolate the electrical mains
supply before starting any work on the appliance and
observe all relevant safety precautions.
CAUTION:
Component replacement:
▶ After replacement of a gas related component, where
a gasket or seal has been disturbed or replaced, check
for gas tightness using a gas sniffer/analyser.
▶ Also after re-assembly, carry out the following
checks:
Fan pressure in section 6.5,
Flue gas analysis in section 6.6.
NOTICE:
Service work
▶ Service work must be carried out by a competent
engineer, such as British Gas or Gas Safe registered
personnel!
NOTICE:
CO/CO
2
ANALYSER
▶ Service work must not be attempted if a CO/CO
2
analyser is not available.
NOTICE:
▶ Ensure that the gas pressure is satisfactory with all
other gas appliances working.
▶ Do not continue with the other checks if the correct
gas pressure can not be achieved.
Allowed mbar pressure drop
meter/
regulator
across
pipework
boiler inlet
across
boiler
gas control
valve
Natural gas
19 - 23
1
18 - 22
1.5
16.5 - 20.5
L.P.G.
32 - 45
2.5
29.5 - 42.5
1.5
28 - 41
mbar range
Meter
Boiler inlet
Gas Control
valve
19 - 23 mbar
18 - 22 mbar
16.5 - 20.5 mbar
1 mbar
drop
1.5 mbar
drop
Natural Gas
6720644744-44.1Wo
Gas Control
valve
L.P.G.
Regulator
Boiler inlet
32 - 45 mbar
29.5 - 42.5 mbar
28 - 41 mbar
2.5 mbar
drop
1.5 mbar
drop
6720644744-45.1Wo