Glow-worm 24cx, Installation And Servicing Manual

Page: 55 / 64

55
13060
Diagram 15.4
15 Replacement of Parts
15.12 Silencer Assembly (front)
For access, refer to section 15.1.
Pull forwards to remove.
The silencer is a push fit so no tools or fixings are required for
its removal or fitting, see diagram 13.8.
15.13 Condensate Trap
For access, refer to section 15.1.
Remove the drain outlet pipe from the base of the trap.
Remove the condensate drain securing screw and carefully
pull the trap forward, see diagram 13.13.
On the condensate trap there is a key symbol that should be
in line with the locked padlock symbol on the condense drain.
To remove the trap turn in the direction indicated, see diagram
13.13, toward the unlock symbol and carefully pull down clear
of the condense drain.
Remove any solids found in the condense trap.
Flush water through the trap to remove any remaining solids.
Check for any debris in the outlet pipe of the condensate drain
and clean as necessary.
Reassemble and refit the condense trap.
15.14 Heating Flow Thermistor
For access refer to section 15.1.
Remove the silencer front, fan/gas valve assembly and flue
hood for access. See relevant sections.
Refer to diagram 15.3.
Remove the electrical connections from the thermistor.
Remove the retaining clip from the flow pipe.
Remove the thermistor from the retaining clip.
Note that the polarity of the wiring to thermistors is
unimportant.
15.15 Heating Return Thermistor
For access, refer to section 15.1.
Refer to diagram 15.4.
Remove the electrical connections from the thermistor.
Remove the retaining clip from the return pipe.
Remove the thermistor from the retaining clip.
Note that the polarity of the wiring to thermistor is unimportant.
Note that the polarity of the wiring to thermistor is unimportant.
15.18 Domestic Hot Water Thermistor
For access, refer to section 15.1.
Refer to diagram 15.5.
Remove the electrical connections from the thermistor.
Remove the retaining clip from the DHW pipe.
Remove the thermistor from the retaining clip.
Note that the polarity of the wiring to thermistor is unimportant.
15.19 Plate-to-Plate Heat Exchanger
For access, refer to section 15.1.
Drain the boiler heating circuit, refer to section 15.1.
Refer to section 15.3 and drain the boiler hot water circuit.
Refer to diagram 15.6.
Remove the gas supply pipe from the gas service isolation
valve and the gas valve, refer to relevant parts of section 15.4.
Remove the condensate trap as described in section 15.13.
Remove the four screws securing the plate-to-plate heat
exchanger to the hydroblock, see diagram 15.6.
Remove the plate-to-plate heat exchanger.
When replacing the plate-to-plate heat exchanger ensure that
the four rubber sealing washers are fitted into the hydroblock.
NOTE: The plate-to-plate heat exchanger only fits one way
round.
Refill, vent and pressurise the boiler.
Open the cold-water isolation valve and slowly open a hot
water tap to remove air.
Close the hot water tap and check for any leaks.
Open the heating circuit isolation valves, re-pressurise the
system as necessary, refer to diagram 15.1.
13063
Diagram 15.5