46
SERVICING
icos system -
Installation and Servicing
69 PUMP HEAD REPLACEMENT
1.
Refer to Frame 50.
2.
Remove the boiler front and bottom panels.
Refer to Frame 42 & 43.
3.
Drain the boiler. Refer to Frame 68.
4.
Swing the control box down into the servicing
position. Refer to Frame 44.
5.
Disconnect the electrical lead from the pump.
6.
Remove the 4 Allen screws retaining the pump
head.
7.
Remove the pump head.
8.
Fit the new pump head.
9.
Reassemble in reverse order.
10.
Refill the boiler. Refer to Frame 30.
11.
Check operation of the boiler. Refer to Frame 50.
68 DRAINING THE BOILER
1.
Refer to Frame 50.
2.
Remove the boiler front and bottom panels. Refer to
Frame 42 & 43.
3.
Close all the water isolating valves on the piping
frame.
4.
Attach a length of hose to the drain point and open
the drain valve.
5. After replacing any component on the boiler,
close the drain valve, remove the hose and open
all system isolating valves, (and re-pressurise as
appropriate) before proceeding to check operation
of the boiler.
6.
Check operation of the boiler. Refer to Frame 50.
isolating valve
(
shown closed
)
Isolating valves
Drain point
Drain valve
nm84
6
2
TO OPEN
SER
VICING
200214-11.pmd
17/11/2006, 09:36
46
