Glow-worm Flexicom hx - Manual (Page 55)

55
15 Replacement of Parts
Diagram 15.6
14385
Diagram 15.7
14402
SECURING
SCREW
SECURING
SCREW DRAIN
POINT
HEAT
EXCHANGER
(with the burner and flow pipe
removed for clarity)
Remove the heat exchanger
Undo the screws securing the flanged elbow on the top right
hand side of the heat exchanger and remove the retaining clip
from the flanged elbow, see diagram 15 5.
Remove retaining clip from the flanged elbow on the bottom of
the heat exchanger, see diagram 15.4.
Remove screws securing the heat exchanger, one on top and
one underneath the heat exchanger, see diagram 15.6.
Lift up heat exchanger slightly to disengage it from its hanging
bracket.
Remove the heat exchanger by pulling forward, then pulling
to the right to disengage the return pipe and tilting backwards
to ease removal complete with sump. Discard the heat
exchanger and flanged elbows.
Remove the burner
Remove the six flanged nuts and two studs that secure the
burner, note that the two studs also hold the fan clamping
bracket, see diagram 15.7.
Taking great care not to damage the surface of the burner.
NOTE: Replace the burner gasket and follow the tightening
sequence when re-fitting the burner, see diagram 15.7.
NOTE: Fit all replacement gaskets and seals when re-fitting
parts.
Refer to Section 12.
Fill the boiler heating system.
Re-pressurise (sealed sysem only)
Check for any leaks.
Vent all air from the system.
Test for gas tightness, earth continuity, polarity, short circuit
and resistance to earth.
Light the boiler and carry out functional checks.