SERVICING AND SPARES
6 720 803 599 (2012/06)
45
21. PUMP HEAD
B
Ensure the appliance has been fully drained.
1. Disconnect the pump connections following steps i to iv.
2. Remove the four Allen bolts (A) securing the pump at each corner.
3. Gently pull the pump towards you and remove.
B
To refit, follow the above in reverse.
Fig. 74 Pump head removal
22. PRESSURE GAUGE
B
Ensure the appliance has been fully drained.
B
Withdraw the spring clip from the pressure sensing head housing.
B
Undo the nut on the rear of the pressure gauge.
B
Remove the pressure sensing head and pressure gauge capillary from
the housing.
B
To refit, follow the above in reverse.
DO NOT
leave out the washer from the capillary when fitting a
replacement gauge.
23. FLOW SENSOR, FLOW RESTRICTOR HOUSING AND FILTER
B
Ensure the domestic hot water circuit is fully drained.
B
Disconnect the electrical connection to the turbine.
B
Remove the spring clip from the housing and move the brass pipe to
one side.
1. Withdraw the flow sensor and filter from the housing.
B
Using the cartridge tag, withdraw the flow restrictor housing.
B
If the regulator housing has become stuck, a pair of long nosed pliers
may be used to grip the housing.
B
To refit, follow the above in reverse.
B
Ensure any seals that have been disturbed are renewed.
24. FLOW RESTRICTOR
B
Remove the flow restrictor housing (See Removing the flow sensor,
flow restrictor and filter).
2. Using a small Allen key or similar, push the flow restrictor cartridge out
of its housing.
B
To refit, follow the above in reverse.
Ensure any seals that have been disturbed are renewed.
Fig. 75
25. DRAIN TAP
B
Ensure the appliance has been fully drained.
1. Rotate the drain tap fully anticlockwise.
2. Withdraw the drain tap from its housing.
B
To refit, follow the above in reverse.
Ensure any seals that have been disturbed are renewed.
2.
3.
A
A
21.1
i.
iii.
iv.
ii..
6720647361-41.1W
o
1.
1.
2.
6720647361-42.1Wo
