Flow Sensor, Flow Restrictor Housing And Filter; Flow Regulator; Drain Tap; Pressure Gauge - Worcester GREENSTAR 24i Junior Installation Instructions Manual

6.8.21 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.
1. Remove the spring clip from the housing and move
the brass pipe to one side.
B Remove the wire mesh filter from the free end of the
pipe and clean thoroughly.
B Insert the wire mesh filter with the round end first.
2.
Fig. 116 Flow sensor
2. Withdraw the flow sensor and filter from the housing.
B 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.
B Apply silicone lubricant to the seals to ease assembly.
B To refit, follow the above in reverse. Ensure any seals
that have been disturbed are renewed.

6.8.22 FLOW REGULATOR

B Remove the flow restrictor housing (See Removing
the flow sensor, flow restrictor housing and filter).
1
Fig. 117 Flow regulator
B Using a small Allen key or similar, push the flow
restrictor cartridge out of the housing.
B To refit, follow the above in reverse.
B Ensure any seals that have been disturbed are
renewed.
1 Turbine
2 Flow Restrictor - 24 i = white, 28 i = blue
3 Filters
4 Flow restrictor housing
Tab. 25 Flow regulator parts
6 720 644 741a (2010/10)
1.
6720643895-90.1Wo
2 3
4
6720643895-91.1Wo

6.8.23 DRAIN TAP

B Ensure the appliance has been fully drained.
1. Rotate the drain tap fully anticlockwise and push in.
2. Withdraw the drain tap from its housing
6.
2.
5.
Fig. 118 Drain tap and pressure gauge removal
B Apply silicone lubricant to the seals to ease assembly.
B To refit, follow the above in reverse. Ensure any seals
that have been disturbed are renewed.

6.8.24 PRESSURE GAUGE

B Refer to figure 118
B Ensure the appliance has been fully drained (see
draining the appliance).
3. Prise the lugs apart (3) securing the pressure gauge to
the fascia.
4. Remove the gauge (4) taking care not to damage or
kink the capillary.
5. Withdraw the spring clip from the pressure sensing
head housing.
6. Remove the pressure sensing head and pressure
gauge capillary from the housing.
NOTICE: Heat damage
B Route the plastic capillary tube away
from the pump to ensure that the pipe is
not melted against a hot pump body.
B To refit, follow the above in reverse. DO NOT omit the
washer from the capillary when fitting a replacement
gauge.
SERVICE AND SPARES
1.
4.
3.
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