Glow-worm Black Beauty 4 - Manual (Page 17)

17 221906B
8 Servicing and Replacement of Parts
8.4 To Remove The Piezo Generator
Remove the gas tap as section 8.3.
Make sure that the tap is in the off position.
Remove the circlip holding the piezo unit to the tap. Remove the
piezo unit, see diagram 8.1.
Replace in the reverse order.
8.5 To Grease The Control Tap
Detach the tap and remove the piezo generator as section 8.4
making sure that the tap is in the off position.
Remove the two screws from the head of the tap. Remove the
niting head and spindle complete with collar and spring.
Note the position of the slot in the plug - mark its position on the
tap body.
Remove the plug rotating slightly while pulling.
Clean and grease the plug lightly with a suitable grease. Do not
apply excessive grease. Particularly, make sure that the gas
ports in the tap are not restricted by grease.
Push the plug into the tap body and position the slot in line with
the mark previously made on the tap body.
Reassemble the niting head and spindle complete with collar
and spring making sure that the components are correctly
engaged. Check the operation of the tap.
Refit the piezo generator.
8.6 To Remove An Injector
Remove the outer case as section 8.1.
Refer to diagram 8.2.
Release the pipe compression fitting to the upper or lower
injector as required. Lock the injector with a second spanner to
ensure that it does not move.
Loosen the pipe compression fitting at the tap end and move the
pipe clear.
Remove the injector from the burner.
Replace in the reverse order.
8.7 To Remove The Complete Burner Module,
Pipes and Pilot
Remove the outer case as section 8.1.
Remove the coal as section 8.2.
Support the inlet isolating elbow to avoid straining the pipework
and disconnect the appliance from the elbow.
Detach the gas tap bracket from the right side of the appliance
by removing three screws, see diagram 8.3.
Detach the left side of the burner from the firebox by removing
one screw, see diagram 8.4.
Carefully slide the burner module to free the support lip from the
right side of the firebox, see diagram 8.2.
Remove the pipes, or pilot unit if required.
Replace in the reverse order.
Note:
1.The pilot unit is an atmosphere sensing device. It must be
replaced as a whole assembly. Its individual components are
not separately replaceable.
2.Check that there is no blockage of the air intake tube at the
back of the pilot unit.
To allow optimum air intake, the air intake tube should be be
within the limits of angular relationship to the burner rail shown
in diagram 8.5. Rotate the tube if necessary.
Diagram 8.3
9592
Diagram 8.4
9594
SECURING
SCREW
BURNER
MODULE
GAS TAP
BRACKET
SECURING
SCREW (3)
THERMOCOUPLE
CONNECTION
Diagram 8.5
9599
PILOT AIR
INTAKE TUBE
BURNER
MODULE
70
°
-
110
°