Worcester GREENSTAR HIGHFLOW 440CDi Instruction Manual page 45

A
B
C
D
E
F
E
G
H
J
INSTALLATION & SERVICING INSTRUCTIONS
8 716 115 219c (03.2010)
REPLACEMENT PARTS
Sensors:
Check that the appliance is electrically
isolated.
Central heating flow temperature sensor
(A):
Remove the connector.
Release the sensor clip and withdraw
the sensor.
Apply heat transfer paste to the
replacement sensor.
Drain the system first:
Safety temperature limiter (B):
Remove the connectors.
Unscrew the sensor.
Tank sensor (C):
Remove screws retaining plastic cover.
Remove cover and disconnect 2 electrical
connections.
Unscrew 2 hexagon studs.
Replace sensor coating surface with paste
supplied.
Re-assemble.
Tank overheat thermostat (D):
Remove screws retaining plastic cover.
Remove cover and disconnect 2 electrical
connections.
Unscrew 2 hexagon studs.
Replace sensor coating surface with paste
supplied.
Re-assemble.
Flow sensor/flow regulator assembly (E):
Shut off mains water at inlet valve and
drain DHW circuit.
Disconnect inline connector.
Remove 2 retaining clips (F).
Remove flow sensor assembly (E).
Remove brass housing with flow regulator
(G) from sensor.
Re-assemble ensuring that retaining clips
are correctly positioned.
Flue Temperature limiter (H):
Remove the connector.
Unscrew the sensor.
Domestic hot water temperature sensor
(J):
Release and pull-off the connector.
Unscrew the bracket.
Replace sensor coating surface with paste
supplied.
Re-assemble.
REPLACEMENT PARTS
43