Baxi 100 He, Installation And Servicing Instructions

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12.0 Servicing the Boiler
27
12.1 Annual Servicing
IMPORTANT: When servicing ensure that both the
gas and electrical supplies to the boiler are isolated
before any work is started.
When the boiler control knob is switched off the
control PCB remains live. Therefore it is important to
isolate the electrical supply.
Hazardous materials are not used in the
construction of Baxi products, however reasonable
care during service is recommended.
When replacing the combustion box door after
servicing it is essential that the retaining screws are
tightened fully.
1. For reasons of safety and economy, it is
recommended that the boiler is serviced annually.
Before servicing please read Section 1.2 Important
Information.
2. After servicing, complete the relevant section of
the “Benchmark” Installation, Commissioning and
Service Record Log Book. This should be in the
possession of the user.
3. Ensure that the boiler is cool.
4. Ensure that both the gas and electrical
supplies to the boiler are isolated.
5. Remove the outercase and lower door panel
(see Fitting the Outercase, Section 11.0).
6. Release the four 1 /
4
turn screws securing the air
box door panel and remove the door (Fig. 40).
7. Disconnect the leads from the centre and right
hand terminals (earth and flame sensing probe).
The spark electrode lead is permanently fixed to
the electrode. Undo the re-usable cable tie and pull
down the sleeving to expose the joint in the
electrode lead. Disconnect the lead (Fig. 41a).
8. Undo the four screws securing the combustion
box door and remove the door (Fig. 41).
9. Visually check for debris/damage and clean or
replace if necessary the following:
a) Burner (Fragile - handle with care) .
b) Heat exchanger fins.
c) Fan compartment
(Check also for condensate leaks).
d) Insulation.
e) Door seals-
Important: Pay particular attention to
the condition of the combustion box door seals.
f) Electrodes.
g) Check condensate trap for debris.
NOTE: If
necessary remove the trap drain plug and place a
vessel underneath to catch the condensate (care
should be taken as this could be hot). Clean the
trap and refit the drain plug.
h) Top of heat exchanger.
HIG
H
LO
W
HIG
H
LO
W
Air Box Door Panel
Lead Terminals
Combustion Box
Door Panel
Fig. 40
Fig. 41
Fig. 41a
Cable Tie
Sensing
Earth
Spark
Sleeve