SERVICE AND SPARES
CDi Compact
ErP
- 6 720 813 276 (2015/07)42
7 SERVICE AND SPARES
• To ensure continued efficient operation the appliance must be
checked at regular interval.
• 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.
7.1 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.
7.2 Checking flue integrity
The integrity of the flue system and performance of the boiler can be
checked via the flue turret sample points.
Fig. 65 Flue turret test points
With the boiler case on and the boiler running at maximum output (refer
to section 7.5.1 “Setting the boiler maximum”).
▶ Insert the analyser probe into the air intake sample point.
▶ Ensure that the probe reaches the centre of the air intake, adjust the
cone on the probe so that it seals the sample point and correctly
positions the end of the probe.
▶ Allow the readings to stabilise and check that:
–O
2
is equal to, or greater than 20.6%.
–CO
2
is less than 0.2%
▶ If the readings are outside these limits then this indicates that there
is a problem with the flue system or combustion circuit, e.g. missing
or dislodged seals.
Fig. 66 Flue integrity test
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 7.5,
Flue gas analysis in section 7.6.
NOTICE: Service work
▶ Service work must be carried out by a competent
engineer, such as Gas Safe registered personnel!
NOTICE: FLUE GAS ANALYSER
▶ Service work must not be attempted if a flue gas
analyser is not available.
Flue gas sample point 1
Air inlet sample point 2
Table 26 Key to figure 65
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