Testing The Operation Of The Gas Cooker - Westinghouse PSP632 User Manual

LPG 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 LPG 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.
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 LPG.
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
than ±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 direction of gas flow.
INSTALLATION 24
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

TESTING THE OPERATION OF THE GAS COOKER

NOTE: You MUST test the cooker after installation, before
you hand it over to the customer.
You MUST have a manometer and a connecting tube.
CHECKING GAS SUPPLY
1. Check the manometer zero point is correct.
2. Connect the manometer to the cooker pressure test point.
This is located on the regulator or LPG inlet fitting.
3. Turn on the gas supply and the electricity and try to ignite
the gas.
NOTE: It will take additional time to light the gas for the first
time as air needs to be purged from the pipes.
4. Check the operating pressure for the particular gas type
(see table on page 23).
FOR LPG COOKERS: Adjust the regulator if necessary (this may be
remote from the cooker).
FOR NATURAL GAS COOKERS
Regulators are supplied pre-adjusted and configured by the
component maker for use with Natural Gas. The appliance
installer is not required to make an adjustment to obtain the
correct outlet pressure setting.
An arrow on the base of the regulator indicates the direction
of gas flow when the inlet and outlet of the regulator are
orientated correctly. When the regulator has been fitted check
for leaks from the connections with soapy water.
CHECKING THE FUNCTION OF THE REGULATOR
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 by more than ±20% of the
nominal outlet pressure (ie ±0.20kPa for Natural Gas).
If the regulator appears to not be performing satisfactorily
then check the following points.
1. 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 1.13 – 5kPa.
2. 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 direction of gas flow.
Once these checks have been completed, if the
regulator still fails to perform in a satisfactory manner it
should be replaced.
TESTING THE COOKER FEATURES
• Observe the flame appearance on each burner. If it is
much smaller or larger than expected, then the injector
size needs checking.
NOTE: When flame is unsatisfactory, then refer to the Electrolux
Technical Publications and correct the fault, if possible.
When maximum flame appearance is correct, then check the
turn-down setting on each burner. If the settings appear to be
incorrect, proceed as follows:
1. Adjust the bypass screw mounted on the body of each
hotplate control cock. This is accessible when the control
knob and the control panel are removed.
2. Check the ignition on all burners both separately and
in combination.
3. Check the operation of the electrical components,
if applicable.
4. If you are satisfied that the cooker is operating correctly,
then turn it off and show the customer how to use it.
Make sure you ask the customer to operate the clock
and controls.
NOTE: If the cooker cannot be adjusted to perform correctly,
then inform the customer of the problem and put a warning
notice on the cooker. If the problem is dangerous, then
disconnect the cooker. If there is a fault, then the customer
should be advised to contact the manufacturer's local service
organisation or the retailer.
25
TESTING THE
OPERATION