Glow-worm Betacom 24, Руководство по установке и обслуживанию

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12 Servicing
Diagram 12.1
Important Notes
To ensure the continued effi cient and safe operation of the boil-
er it is recommended that it is checked and serviced at regular
intervals. The frequency of servicing will depend upon the par-
ticular installation and usage, but in general once a year should
be enough.
It is the Law that any servicing is carried out by a
competent
person.
When replacing a part on this appliance, use only spare parts
that you can be assured conform to the safety and performance
specifi cation that we require. Do not use reconditioned or copy
parts that have not been clearly authorised by Glow-worm.
Before commencing with a service or replacement of parts the
boiler should be isolated from the electrical supply and the gas
supply should be turned off at the gas service cock, see dia-
gram 12.1.
Testing Flue Gases: If any doubt exists that the fl ue products
are not exhausting correctly, investigate by use of a gas ana-
lyser (FGA).
Measurement of the products of combustion can be achieved
by connecting a probe to the combustion analyser test point on
the fl ue elbow, refer Combustion Check.
IMPORTANT NOTE: Products of combustion will be dis-
charged when the cap is removed. It is important to replace the
cap immediately.
12.1 Combustion Check
A combustion check should not be necessary unless a gas car-
rying component has been replaced or the combustion setting
is suspect.
Connect a CO2 combustion analyser to the test point, see dia-
gram 12.2.
Turn on the gas service cock, see diagram 12.1.
Turn on the electrical supply.
A competent person only should carry out any adjustment
to the gas valve.
• supply the boiler and turn the Central Heating knob to
Summer position ;
• ensure that room thermostat contact is closed (activated)
or open an hot water tap (the heat produced by the boiler
will be drained consequently);
• turn the Hot Water knob to the position and wait
(about 5 seconds) that green lamp fl ashes with short
intervals. When this occurs, turn the Hot Water knob on
the scale from I to . The burner ignites at the maximum
output not modulated;
• perform the combustion check;
• switch off the burner, by turning the Central Heating knob
to the position . The green lamp fl ashes with long
intervals.
Remark: the burner will switch off automatically when reach-
ing the maximum temperature, and in any case after 15
minutes.
Diagram 12.2
GAS COCK
TEST POINT