Classic Combi FF 280 -
Installation
42
85 DIVERTER VALVE (COMPLETE) REPLACEMENT
84 DHW CALORIFIER REPLACEMENT
1.
Refer to Frame 64.
2.
Drain the boiler. Refer to Frame 81.
3.
Remove the CH expansion vessel. Refer to Frame 45.
4.
Remove the 2 securing screws and withdraw the pipe
support bracket.
5.
Close the DHW inlet isolating valve.
6.
Open the lowest DHW draw-off tap.
7.
Drain any residual water into a receptacle via the DHW
drain point.
8.
Undo the unions on the DHW inlet pipe and move the pipe
aside.
9.
Slacken diverter valve union nut C.
10.
Undo calorifier union nut D.
11.
Undo calorifier unions A and B and withdraw the calorifier
from the boiler.
12.
Fit the new calorifier, complete with the new sealing
washers provided, and re-assemble in reverse order.
TO DESCALE THE CALORIFIER:
a.
Remove the calorifier from the boiler as described
above.
b.
Descale the domestic hot water coil, using a proprietary
descaling agent.
c.
Rinse thoroughly with clean water.
d.
Re-assemble in reverse order.
WARNING.
The agents are highly corrosive - ingestion or
contact with skin, eyes and clothing MUST be avoided.
Protective clothing should be worn and the descaling
operation conducted out of doors in a well ventilated area.
Note.
The names and addresses of suppliers of suitable
descaling agents are given in Frame 4.
1.
Refer to Frame 64.
2.
Drain the boiler. Refer to Frame 81.
3.
Remove the CH expansion vessel. Refer to Frame 45.
4.
Remove the automatic air vent. Refer to Frame 88.
5.
Disconnect the diverter valve lead at the inline connector.
6.
Undo diverter valve union A and the bypass union.
7.
Slacken the CH flow pipe union.
8.
Undo diverter valve union B.
9.
Slacken diverter valve union nut C as far back as possible.
10.
Prevent union nut C from turning and undo calorifier union
nut D. This will jack the diverter valve towards the right
and permit its withdrawal from the boiler, complete with
stub pipe.
11.
Transfer the stub pipe to the new valve.
12.
Fit the new diverter valve and re-assemble in reverse
order.
SERVICING
SER
VICING