Servicing - Potterton Promax 15 HE Installation & Service Instructions Manual

12.0 SERVICING

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 on/off switch 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 Potterton 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 (see Fitting the Outercase,
Section 11.0).
6. Release the four 1 / turn screws securing the air
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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) The condensate trap must be thoroughly cleaned
at every service (see section 13.11 for removal).
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. Check
for leaks.
h) Top of heat exchanger.
Publication No. 5106451
Air Box Door Panel
Earth
Sensing
Spark
Fig. 41a
Sleeve
Cable Tie
Combustion Box
Door Panel
Fig. 40
Lead Terminals
Fig. 41
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