42
mexico HE
-
Installation & Servicing
Servicing
66 hEAT ExChANgER REpLACEMENT
Refer also to Frame 10, ‘Boiler exploded view’.
1.
Refer to Frame 51.
2.
Remove boiler front panels and inner sealing panel refer
frames 44 & 45.
3.
Remove the outer wall sealing plate (if fitted) and turn the
terminal anticlockwise to unlock the turret bayonet fixing
and pull the terminal to disconnect the boiler turret from
the flue assembly.
4.
Fully drain the system
5.
Disconnect the gas, water flow & water return union
connections at the pre-piping frame
6.
Disconnect the condensate connection at the ‘S’ trap and
the condensate pump (if fitted)
7.
Protect the floor area front of the boiler, remove the
screws fixing the boiler to the pre-piping frame and pull
the boiler forward to clear any kitchen unit obstructions
taking care with the electrical wiring.
8.
Remove the fan & venturi assembly (refer to frame 46)
9.
Remove burner (refer to frame 47)
10.
Remove ignition electrode (frame 55) & detection
electrode (frame 56)
11.
HE30 & HE36 models only – Remove the spark
generator (frame 57) and remove the electrical
connections from the flow thermistor (frame 52 and the
overheat thermostat (frame 63)
12.
Remove the dry fire thermostat (frame 64)
13.
HE15, 18 & 24 only – Remove the rubber plug to gain
screwdriver access to the fixing screw retaining the heat
exchanger bottom right copper pipe bracket and remove
the screw.
14.
HE30 &36 only – Unscrew the copper pipe connection at
the top left of the heat exchanger and remove the pipe by
pulling upwards through the rubber grommet.
15.
Remove the 4 screws retaining the flue turret and remove
the turret.
16.
Remove the 4 screws retaining the flue support bracket.
17.
Remove the 19 screws retaining the rear air box and
remove the box.
18.
HE15, 18 & 24 only- Pull the flue elbow bracket slightly
sideways to release the elbow and pull the plastic flue
elbow assembly from its joint.
19.
HE30 &36 only- Pull the plastic pipe from its joint.
continued . . . .
s
ER
VICIN
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Summary of Contents for he15
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