Glow-worm Heartbeat 4 - Manual (Page 16)

16 221905B
8 Servicing and Replacement of Parts
Servicing Notes
MAKE SURE THE FIRE FRONT IS COLD.
Servicing must be carried out by a competent person.
After completing a service, always test for gas soundness and
carry out functional check of controls.
Unless stated otherwise all parts are replaced in reverse order
to removal.
Before starting make sure that the gas supply is turned off at the
Fire isolating valve, see diagram 5.4.
NOTE: It is recommended that the back boiler be serviced
before refitting the fire front case, refer to Back Boiler Installation
Instructions.
CAUTION: Disconnect the boiler user control before removing
the fire front chassis when servicing the back boiler unit, refer
to Section 5.
After removing or disconnecting any pipework always make
sure that it is refitted correctly and does not interfere with the
fitting of the fire.
8.1 Servicing
Detach the glass panel surround, see diagram 6 in section,
Instructions for Use.
Remove the two knurled screws which are under the outer case
canopy.
Pull the top of the glass panel surround forward.
Lift the glass panel surround up to clear the slots in the case
apron and store carefully.
Remove the control knob by pulling clear of the gas tap spindle.
Remove the control bezel by unscrewing two screws, see
diagram 4.2.
Detach the outer case by removing the screws at the sides, see
diagram 4.2.
Pull the bottom of the case forwards while springing the bottom
corners outwards to clear the fixing brackets. Lift the case
upwards and forwards to clear. Place carefully to one side.
Remove the glass panel assembly by turning the screws each
side of the frame
1 /
4
turn anticlockwise and lifting the unit clear,
see diagram 6 in section, Instructions for Use.
Remove the fuel bed and clean, Refer to "Ceramic Coal" in
Instructions for Use.
Clean all around the fire front chassis with a soft brush or
vacuum cleaner.
Make sure that the electrode spark gap is as shown in diagram
4.6.
Clean injectors as necessary, but, Do not clean injectors with a
wire or sharp instrument.
Clean the burner with a soft brush or vacuum cleaner.
Replace in the reverse order. Make sure that the coal is not
dislodged when refitting.
NOTE: It is recommended that the back boiler unit be seviced
before refitting the fire front case, refer to the Back Boiler
Installation Instructions.
Replacement of Parts Notes
REMEMBER: When replacing a part on this appliance, use only
spare parts that you can be assured conform to the safety and
performance spcification that we require. Do not use
reconditioned or copy parts that have not been clearly authorised
by Hepworth Heating Ltd.
8.2 Fuel Bed
Remove the glass panel assembly as described in section 8.1.
Remove the fuel bed.
When replacing, make sure that the coal rests on the ledges at
the sides of the firebox and that its back face is touching the
horizontal rib at the back of the firebox, see diagram 7 in the
Instructions for Use section.
Replace and secure the glass panel assembly to the firebox by
turning the two screws
1 /
4
turn clockwise with the tool provided.
Replace the surround. Make sure that the outside edges of the
surround sides are inside the outer case.
8.3 To Remove The Gas Tap
Remove the outer case as section 8.1 above.
Detach the electrode lead from the pilot unit by pulling the lead
down and away from the electrode situated at the centre rear of
the burner.
Disconnect the two pipes linking the upper and lower injectors
at the tap end and loosen their connections at the injector ends.
Swing the pipes clear of the tap, see diagram 8.1.
Disconnect the inlet pipe and pilot pipe from the gas tap and
remove the locknut holding the gas tap to the tap bracket, see
diagram 8.1.
Carefully lift the tap clear to allow access to the thermocouple
connection. Disconnect the thermocouple from the tap.
Replace in the reverse order.
Diagram 8.2
9498
Diagram 8.1
9498
PIEZO UNIT
LOCKNUT
GAS TAP
GAS TAP
BRACKET
INJECTOR
COMPRESSION
FITTING
INJECTORS
BURNER MODULE
SUPPORT LIP