43
REPLACEMENT OF PARTS
IMAX XTRA EL
-
Installation & Servicing
52 LOW VOLTAGE HARNESS REPLACEMENT
53 REPLACEMENT OF AIR PRESSURE SWITCH TUBES
1. Refer to Frames 34 & 36.
2. Remove the connections from the two
air pressure switches.
3. Remove the connections from the three
Thermistors.
4. Remove the connections from the
Water Pressure Switch.
5. Remove the connectors from the PCB.
6. Remove the top two connectors on
LHS of control box.
7. Feed the harness back through the
control box and remove.
8.
To refit, feed the new harness through
the control box and fit the top two LHS
connectors.
9. Feed the harness back to the
components listed above using the
retaining clips and connect.
2
3
4
GAS
VALVE
Whirl
Wind
Mixer
FAN
Heat Exchanger
Sump
Air Pressure Switches
(APS)
+
-
-
1. Refer to Frames 34 & 36.
2. Disconnect the two tubes from the faulty APS.
3. Disconnect the electrical connections from the faulty APS,
taking note of their positions.
4. Unscrew the APS from the bracket.
5. Replace faulty APS with new component.
If variable APS is being replaced, ensure
switching pressure is set for correct boiler
size as per table shown.
Boiler Size
(kW)
Sump Outlet Air Pressure
Setting (Pa)
320
200Pa
395
200Pa
470
300Pa
545
300Pa
620
400Pa
6. Re-connect tubes and electrical connections, ensuring
pipes are fitted the same as diagram shown.
5
6
REPLACEMENT OF P
ARTS
