36
Installation and Servicing
Section 3 - Servicing
SER
VICING
3.2 REMOVAL / REPLACEMENT OF COMPONENTS
WARNING:
Do not operate the boiler without a
front panel fitted
When replacing any component.
1. Isolate the electricity supply.
2. Turn off the gas supply.
3. Remove the boiler front panel.
Refer to Section
3.4
4. Swing the control box down into its servicing position.
After removing / replacing any component.
5. Ensure all gas valve connections are gas tight with a gas
soundness check up to the gas control valve.
6. Ensure all water connections are tight.
7. Test the appliance for correct and safe operation.
Refer to Section
3.1
(General)
Notes.
1. In order to assist fault finding, the control panel has an
LCD diagnostic display. The key to boiler fault conditions
is shown in Section 4.
2. In order to replace components in Sections
3.11
and
3.18
-
3.25
, it is necessary to drain the boiler.
Refer to Section
3.3
3.3 DRAINING THE BOILER
CENTRAL HEATING CIRCUIT
1.
Close all the CH water isolating valves on both the flow and
return.
2.
To drain the primary heat exchanger circuit: Open the drain
valve and attach a length of hose to the CH drain point.
3.
After replacing any component on the boiler, remove the
hose, close the drain valve and open all system isolating
valves.
4.
Repressurise and check operation of the boiler.
5.
Check that the boiler operates.
Refer to Section
3.4
CH
Circuit
Drain
CH
Flow
Gas
CH
Return
PRV
Cond.
Drain
3.4 BOILER FRONT PANEL REMOVAL / REPLACEMENT
REMOVAL
1.
Loosen the two screws retaining the front panel.
2.
Pull the two clips down to disengage and pull panel
forward and upward and remove.
REPLACEMENT
3.
Hook the panel onto the top retaining clips.
4.
Push the panel until the 2 bottom spring clips engage
ensuring the 1 knobs and 2 buttons line up with the holes
in the front panel.
5.
Re-tighten the two retaining screws.
View from bottom
of boiler
View from top
of boiler
1
2
3