46
Response 80 / 100 / 120
- Installation
1. Isolate the electrical supply. Refer to
Frame 54.
2. Remove the boiler bottom panel .
3. Remove the controls panel. If a
programmer is fitted it is necessary to
disconnect the programmer harness at
the terminal block.
4. Close the cock on the HW inlet pipe
below the boiler.
5. Drain down. Refer to Frame 68.
6. Disconnect the flow switch electrical
lead at the in line connector.
7. Undo the knurled fixing nut and withdraw
the flow switch.
8. Fit the new flow switch, ensuring that the
locating pin and hole are correctly
positioned.
9. Complete the reassembly in
reverse order.
10. Open the isolating valve and
bleed air out at the tap(s).
11. Reconnect the electrical supply
and open a HW tap to test
operation of the boiler.
SER
VICING
74
WATER FLOW SWITCH REPLACEMENT
SERVICING
75
INLET FILTER CLEANING
The filter comprises a gauze disc in a synthetic
rubber carrier ring. It is secured at the front (outlet) of
the cold water isolating valve by means of the union
connection between the valve and the boiler inlet
pipework. to access the filter, proceed as follows:
1. Close the cold water inlet valve below the boiler.
Ensure the markings are as shown.
2. Open a hot tap to relieve the pressure in the
expansion vessel and pipework.
3. Drain, using a valve nipple.
4. Undo the union connection referred to above, and
remove the filter disc.
5. Clean or renew the filter disc. Reassemble in
reverse order.
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