47
Response 80 / 100 / 120
- Installation
SERVICING
SER
VICING
77
PRESSURE RELIEF VALVE (Safety Valve) REPLACEMENT
1. Isolate the electrical supply. Refer to
Frame 54.
2. Remove the pump. Refer to Frame 69.
3. Disconnect the mains electrical
connection from the bottom panel.
Disengage the 2 halves of the
connector.
4. Remove the boiler bottom panel.
5. Close the cocks on the CH flow and
return pipework below the boiler. Drain
down. Refer to Frame 68.
6. Disconnect the discharge pipe to the
pressure relief valve.
7. Undo the connection securing the valve
to the boiler.
8. Replace with a new valve and restore
the pipework, in reverse order, using
new sealing washer.
9. Open cocks, fit filling loop, fill, vent and
pressurise to 1 bar (or as required).
10. Restore the electrical supply and set the
heating controls, to test-fire the boiler.
11. Vent air and top up the pressure again,
as required.
12. Remove the filling loop.
76
MAINS TRANSFORMER REPLACEMENT
1. Isolate the electrical supply to the boiler.
Refer to Frame 54.
2. Remove the boiler front panel. Refer to
Frame 48.
3. Release the screws securing the PCB
cover and remove the cover.
4. Disconnect the transformer electrical
leads at the in-line connector
5. Release the transformer mounting
screws.
6. Fit the replacement transformer and
complete the reassembly in reverse
order.
Summary of Contents for responce 100
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