Adjustments; Servicing Knee Valve - Where Fitted; Gas Type Conversion - B+S UFWWD Series Installation, Operating And Servicing Instruction Manual

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3. REASSEMBLE IN REVERSE ORDER.

Adjustments

Pilot
1. Remove front panel as described under GAINING ACCESS TO GAS CONTROL.
2. To increase gas pressure to pilot, turn adjustment screw located at the top right hand side of the flame failure
devise anti-clockwise.
3. To decrease gas pressure to pilot, turn adjustment screw located at the top right hand side of the flame failure
devise clockwise.
4. REASSEMBLE IN REVERSE ORDER ENSURING POSITION OF PILOT IS AS FOLLOWS;
Ensure pilot light head is light head is located no further than 45mm from the injector located opposite the
burner inlet.
Servicing Knee Valve – Where Fitted
The knee valve incorporates a cartridge design for ease of service.
1. Follow procedure described under GAINING ACCESS TO GAS AND/OR WATER SYSTEM
2. To gain access to knee valve cartridge undo knee valve where the deflector meets the cartridge area.
3. REASSAMBLE IN REVERSE ORDER

Gas Type Conversion

The following parts componentry require changing the appliance from NG to LPG (vice-versa);
1. Regulator.
2. Burner.
3. Pilot.
In case of any failure in the functioning of the knee valve, unscrew the head assembly and clean the
mechanism under running water. Only use liquid cleaning products. All cleaning products containing dry
powder or powder in suspension are not to be used!
A specific devise is integrated in the cartridge unit to adjust the flow rate. To adjust the flow rate;
1. Undo head assembly
2. Pull off flow adjustor
3. On the exposed end of the housing there are 4 cut-outs for alternative flow rates.
4. Select one for increased/reduced flow.
5. Replace flow adjustor with window over selected cut-out.
6. Screw head assembly into the tap body and tighten fully.
Table 4: Troubleshooting
FAULT
Pilot light not igniting
Pilot light not establishing
POSSIBLE CAUSE
Blockage of pilot
Adjustment of pressure from flame failure
control
Positioning of thermocouple
Faulty thermocouple
Faulty flame failure control valve
14
CHECKS
Check pilot injector is not blocked as
described in servicing instructions –
pilot and flame safeguard
Check gas pressure to pilot as described
under servicing instructions –
adjustments
Check connection of the thermocouple
to
the control is not loose.
Adjust positioning of thermocouple to
ensure
pilot
flame
thermocouple
Contact manufacturer or authorised
service agent
Contact manufacturer or authorised
service agent
is
hitting

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