Changing Components - Potterton Promax SL Series Installation & Service Instructions Manual

Fig. 44
i) Remove the four screws securing the heat exchanger/combustion box base and withdraw the base.
j) Lower the central insulation panel and check condition (Fig. 44). Replace the lower insulation pad if necessary.
k) Ensure the heat exchanger fins are clear of any obstruction.
l) Check condition of all seals. Important: Pay particular attention to the condition of the combustion box door seals.
m) Reassemble in reverse order and check for leaks.
12. Check the CO/CO ratio and CO
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13. If the ratio or level is greater than that quoted telephone the Technical Enquiries for further advice.
IMPORTANT: No adjustment of the gas valve is permissible.
14. Complete the relevant Service Interval Record section of the Benchmark Commissioning Checklist at the rear of this publication and
then hand it back to the user.
page 44
15.0 Changing Components
15.1 Changing Components
IMPORTANT: When changing components ensure that both
the gas and electrical supplies to the boiler are isolated
before any work is started.
"The boiler cannot be switched off at the boiler, therefore it is
important to isolate the electrical supply at the mains fuse."
Hazardous materials are not used in the construction of these
products, however reasonable care during service is
recommended.
When replacing the combustion box door after changing
components, it is essential that the retaining screws are
tightened fully.
After Changing Components a combustion check should be
performed (see Section 15.8.11). This is especially important
level at the flue sampling point (Fig.41a) is as quoted in Section 4.0, 'Technical Data'.
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