User manual

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CONNECTING TO SERVICES AND COMMISSIONING
LP Conversion – Important (Model 635 only)
This appliance is fitted with Natural Gas burner injectors.
Please follow the procedure below if a conversion to suit UNIVERSAL LP is required.
The conversion kit contains 5 injectors and 1 LPG sticker.
1 Remove the hotplate burners to access the hotplate injectors. Replace the factory fitted
NG injectors with the appropriate injectors, as supplied (see table on page 29).
2 Unscrew the hex nut from the regulator. The hex nut, brass washer and nylon insert will
disengage as an assembly.
3 Unclip the nylon insert from the nut assembly by rotating the insert 1/4 turn, and
pulling it free.
4 Turn over the insert, and clip back into position.
5 Refit the hex nut assembly to the regulator ensuring that it is fully screwed down. The
regulator is now set for connection to LP.
6 Turn on the gas supply and at each new connection check for leaks using soapy water:
each hotplate valve should be turned on, one at a time, and the injector hole blanked
off for several seconds.
7 The operation of the regulator can be confirmed by connecting a manometer to the
pressure test point located on the side of the regulator body adjacent to the outlet.
With the appliance operating check the outlet pressure
• when all burners of the appliance are operating at maximum,
• when the smallest burner of the appliance is operating at minimum.
Under these conditions the outlet pressure should not vary from the nominal outlet
pressure of 2.60kPa by more the +0.52kPa.
8 If the regulator appears to not be performing satisfactorily then check the following
points.
• If the outlet pressure is consistently too low then the inlet pressure may be too low
and adjustment of an upstream regulator may be needed, or an upstream regulator
or valve with insufficient flow capacity may be present in the gas supply line. If this
is suspected then it may be necessary to repeat the checks whilst measuring both the
inlet and outlet pressure to determine if the inlet pressure is in the range 2.75 –
7.00kPa.
• Check that the insert has been fitted correctly.
Check that the turret screw is fully screwed down.
• Check that the regulator has been fitted to the gas supply line in the correct
orientation, the arrow on the base of the body indicates the director of gas flow.
Once these checks have been completed, if the regulator still fails to perform in a
satisfactory manner it should be replaced.
9 One by one, turn the knobs to minimum and screw in the bypass screw (accessible when
the knob is removed) until a small stable flame results. Turn the knob to maximum and
then back to minimum to ensure that the correct minimum flame is maintained.
10 Attach the LPG sticker to the cooker, near the gas supply inlet. Cover the Natural Gas
label that is factory fitted.
Hex Nut assembly,
fully screwed down.
Hex Nut assembly, removed
from regulator and Insert
disassembled.
Insert oriented for
Natural Gas
Operation.
Insert oriented
for LPG
Operation.
SIMPRD 342-1-529 30/1/08 8:51 AM Page 30