Westinghouse 540 upright cooker User Manual page 31

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 (if applicable)
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).
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:
1. When all burners of the appliance are operating
at maximum,
2. 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 1.0kPa 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.
WARNING
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.
WARNING
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.
31
TESTING