09-06-01
Page 16 of 16 op-instruct-leedz-ib.doc
Pilot will not stay lit
Incorrect operation.
Weak or improperly located
pilot flame.
Thermocouple not properly
connected.
Defective thermocouple.
Faulty control valve.
Operator not following correct lighting
procedure, see lighting instructions.
Adjust the height of the thermocouple
(Using the brass nut at its base)
The flame should engulf the top 8mm of the
thermocouple.
Check back of main control where
thermocouples copper tube enters the
control. Tighten brass-collar nut.
Replace thermocouple
A new thermocouple may be ordered
through your YUNCA agent.
(See parts list.)
A replacement may be fitted by a suitably
qualified service person.
(See parts list).
Pilot burning no gas
to burners
Burner injectors may be
blocked.
Faulty control
Disconnect gas supply at burners and
unscrew brass injectors from end of burner.
Use compressed air to clean out orifice.
Control requires replacement.
Back burner stays on
when switched to off
position.
Build up on the control
valve.
Disassemble the control valve by removing
the two screws below the cover. Extract the
control valve note the position. Clean the
control valve clean and re-assemble. Test
operation.
