Potterton Derwent Compact Plus Installation, Operation & Maintenance Manual page 21

POTTERTON COMMERCIAL PRODUCTS DIVISION
INSTALLATION, OPERATION AND MAINTENANCE MANUAL
DERWENT COMPACT PLUS - CONDENSING
system, if fitted, is operating correctly.
5 That the water flow switch, if fitted, is operating
correctly.
To clean the boiler it will be necessary to remove the
boiler flue hood cover and burner assembly as
detailed below. Ensure boiler is isolated from all
supplies.
1 Remove the boiler door by lifting forward and
upwards (disconnect earth wiring and chain).
2 Disconnect the gas union, which is located above
the gas valve.
3 Unscrew the 6 nuts on the burner fixing plate on
the right and left hand sides.
4 Disconnect the spark ionisation and earth wires
to the pilot burner.
5 Pull the burner assembly forward and clean the
burner, pilot burner and combustion chamber of
dust and debris
Dismantling the Secondary Heat Exchanger for
Main Heat Exchanger Cleaning.
Remove Rear Cover
Remove Top Panel
Top Panel Removed & Access to 2
Remove the front part of the hood to allow access to
the main heat exchanger.
SECTION 5
PAGE 19
nd
Heat Exchanger