Glow-worm SwiftFlow 120 Servicing Instructions page 23

4.17 Domestic Hot Water Flow Switch
The replacement of this part can be done within the
limits of "minimum clearances". Should there be a side
clearance of 150mm or more then the multifunctional
control/air ratio unit assembly need not be removed.
Isolate the domestic hot water inlet and drain, refer to
Sections 1.3 and 1.6.
When replacing the flow switch it is recommended that
the water inlet filter is cleaned or renewed.
When replacing the flow switch make sure that it is
correctly positioned, with the flow direction arrow
pointing upward.
Remove the burner as Section 2.2.
Remove the multifunctional control and air/ratio
assembly as described in Section 4.15.
Disconnect the front sensing tube.
Disconnect the flow switch connectors, see
diagram 4.13.
Remove the locknut from the flow switch and lower the
domestic hot water inlet pipe assembly, including flow
switch, from the base of the main panel.
Disconnect the filter union nut.
Supplied By www.heating spares.co Tel. 0161 620 6677
4 R e p l a c e m e n t o f P a r t s
FLOW
SWITCH
FILTER
UNION
NUT
ELECTRICAL
CONNECTORS
CENTRAL
HEATING
THERMISTOR
23
UNION NUTS
GAS/AIR RATIO
SENSING TUBE
WATER INLET
PIPE ASSEMBLY
ISOLATING
UNION
VALVE
NUT
D.H.W.
THERMISTOR
'O' RING
ELECTRICAL
CONNECTORS
Diagram 4.13
'O' RING
Diagram 4.14
221045A