36
Response 80 / 100 / 120
- Installation
55
CH AND HW TEMPERATURE SENSOR REPLACEMENT
56
HW LIMIT THERMOSTAT REPLACEMENT
(Spares for both are identical)
1. Disconnect the electrical supply.
2. Remove the boiler front and sealing panels.
Refer to Frame 48.
3. Remove the fan (refer to Frame 49) : the CH and
HW thermistors are now exposed.
4. Close off the isolating cock(s) at the bottom of the
boiler, for CH or HW, as appropriate.
5. Release system pressure by opening the
appropriate drain cock(s).
Do NOT release CH
pressure using the pressure relief valve - it may
cause debris within the system to foul the valve.
6. Disconnect the plug-in lead from the temperature
sensor and unscrew the sensor to release it.
7. Screw in the new sensor, using thread sealant,
reconnect and re-assemble in reverse order.
8. Open cock(s) and refill / repressurise pipework.
9. Test fire the boiler.
10. Disconnect the filling loop (if used).
SERVICING
SER
VICING
1. Disconnect the electrical supply.
2. Remove the boiler front panel. Refer to
Frame 48.
3. Remove the fan (refer to Frame 49) : the
HW limit thermostat can now be seen,
attached to the HW pipework by two
3.5mm screws.
4. Disconnect the leads from the
thermostat.
5. Release the 2 securing screws and
remove the old thermostat.
6. Fit the new thermostat, reconnect and re-
assemble in reverse order.
7. Reconnect the supply and test fire the
boiler.
Summary of Contents for responce 80
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