Glow-worm Flexicom sx - Manual (Page 42)

0020107231_04 - 12/14 - Glow-worm
MAINTENANCE
- 42 -
Diagram 14.8
14736
AUTOMATIC
AIR VENT
RETAINING
CLIP
14.18 Safety Discharge Valve
For access, refer to section 14.1.
Refer to section 14.2 and drain the boiler heating circuit.
Refer to diagram 14.7.
Undo the safety discharge valve union and remove from the
pipework.
Remove the retaining clip and withdraw the safety discharge
valve.
Fit new ‘O’ ring.
Refill, vent and pressurise the boiler and check for leaks.
14.19 Automatic Air Vent
For access, refer to section 14.1.
Refer to section 14.2 and drain the boiler heating circuit.
Refer to diagram 14.8.
Remove the retaining clip to release the automatic air vent.
Fit the new automatic air vent and ‘O’ ring ensuring the vent
cap is left loose.
Refill, vent and pressurise the boiler and check for leaks.
14.20 Heat Exchanger
For access, refer to section 14.1.
Remove silencer front, flue hood, gas valve / burner assembly,
igniter unit and support bracket, spark electrode lead, burner
and condense trap.
Refer to section 14.2 and drain the boiler heating circuit.
Remove the retaining clip, see diagram 14.10, which secures
the flow pipe brass elbow into the hydroblock. Remove the
retaining clip, which secures the flow pipe into the flanged
elbow in the top right hand corner of the heat exchanger, see
diagram 14.11.
Remove the left hand side panel to aid removal of the copper
flow pipe. Note that the minimum clearance from the side panel
is 5mm.
Remove screws securing the heat exchanger, one on top and
one underneath the heat exchanger, see diagram 14.9.
Undo the knurled nut at the right hand side of the hydroblock.
Remove the retaining clip from the flanged elbow at the right
hand bottom of the heat exchanger. Remove the return pipe.
Lift up heat exchanger slightly to disengage it from its hanging
bracket.
Remove the heat exchanger, complete with sump, return pipe
and flanged elbows, by pulling forward and tilting backwards to
ease removal.
Diagram 14.9
12812
Diagram 14.10
15589
FLOW
PIPE
RETAINING
CLIP
Diagram 14.11
15591