SERVICING AND SPARES
6 720 815 725 (2015/05) 49
22. PRESSURE GAUGE
▶ Ensure the appliance has been fully drained.
▶ Withdraw the spring clip from the pressure sensing head housing.
▶ Undo the nut on the rear of the pressure gauge.
▶ Remove the pressure sensing head and pressure gauge capillary
from the housing.
▶ 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
▶ Ensure the domestic hot water circuit is fully drained.
▶ Disconnect the electrical connection to the turbine.
▶ 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.
▶ Using the cartridge tag, withdraw the flow restrictor housing.
▶ If the regulator housing has become stuck, a pair of long nosed pliers
may be used to grip the housing.
▶ To refit, follow the above in reverse.
▶ Ensure any seals that have been disturbed are renewed.
24. FLOW RESTRICTOR
▶ 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.
▶ To refit, follow the above in reverse.
Ensure any seals that have been disturbed are renewed.
Fig. 95
25. DRAIN TAP
▶ Ensure the appliance has been fully drained.
1. Withdraw the drain pipe from the drain tap.
To do this, remove retaining spring from the drain pipe.
2. Rotate the drain tap fully anti-clockwise.
3. Withdraw the drain tap from its housing.
▶ To refit, follow the above in reverse.
Ensure any seals that have been disturbed are renewed.
Fig. 96 Drain tap removal
1.
2.
6720647361-42.1Wo
2.
3.
1.
6 720 812 176-23.2O
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