Installation manual

43
fig. 4
fig. 5
- To remove the heat exchanger and the burner :
a) Screw out the four screws from the heat exchanger sides
b) take off the flue thermofuse connection
c) remove the spring clips pipe clamp
d) loose and screw out the pump brass nuts and heating flow
e) draw out the pipes from heat exchanger and then broaden the two clamps sides that
block the heat exchanger; unlock pulling down to set free it from air/flue outlet.
To service ignition system:
To remove ignition electrode remove the 2 screws hold the electrode in place. Ignition spark gap to
be 3-4mm. When replacing ensure sealing gasket is not damaged and sealing correctly. If any
doubt replace the gasket.
To replace boiler temperature detector:
To remove and replace control temperature sensor (29), disconnect cable plug, unscrew sensor
from mounting pocket. To refit follow the reverse procedure.
To replace over temperature thermostat:
To remove and replace the over temperature thermostat, ensure power is isolated and locate the
thermostat device mounted within the electrical power enclosure. Open the enclosure, remove the
mechanism and follow the capillary to the sensor fitted to the side of the heat collector on the
boiler. Slide out the sensor to remove.
To replace the Combustion Air Fan:
With the cover removed and the control panel hinged open, carefully remove the air intake duct
from the fan by removing the clip and sliding off from fan intake. Disconnect the wiring removing
the plugs. Remove the screws holding the fan assembly in place and remove.
To refit the fan, follow the reverse procedure ensuring that the fan seals and gaskets are in good
condition. If necessary, replace the gasket. Refit the air intake pipe and return the unit to operating
order.
To replace the burner management control:
Ensure Power is Isolated. Open the control panel and remove all connections from the controller.
Replace the controller checking the conformity of model. Pre-set the position of the dip switches to
the same settings as on the existing controller, and refit all control wiring and close cover.
Re-establish power supply. It is necessary to thoroughly recommission the appliance following the
steps set out in section 3 of the manual, making sure to check fan speed settings and combustion
performance.
Check the operating temperature set point and safety functions.