Operating Pressures; Testing The Operation Of The Appliance - Westinghouse GOR474 User Manual

GAS INStALLAtION INFORMAtION
Check all joints and ensure that connections are sound .

OpERAtING pRESSURES

Supply and operating pressures for various gases and
corresponding injector sizes for each burner .
SUppLY pRESSURE
GAS tYpE
(KpA)
NG & SNG 1 .13 - 5 .00
Universal LP 2 .75

tEStING tHE OpERAtION OF tHE AppLIANCE

This product has an Electronic Burner Control with a flame
safeguard system, which includes a safety shutdown
function that operates when the presence of a flame is not
detected within a prescribed period .
It may be necessary to interrupt the operation of the control
system in order to facilitate purging of air from the appliance .
During the purging procedure the product should be closely
monitored to ensure that the ignition spark can be observed
through the round hole in the left hand side of the cover on
the bottom of the oven, and that the solenoid valve can be
heard to open and close .
1 . After connecting the gas and leak testing the gas connection,
plug in the service cord and turn on the power .
2 . Set the time of day clock (if fitted) .
3 . Purging procedure:
a . Turn on the oven .
b . The unit will commence sparking and the solenoid
valve will open for a short period . If a flame is not
established, the controller will shut the solenoid valve
and stop sparking, then pause for a moment before
repeating this cycle . At this point if there is still no
flame, the control system will go into safety shutdown .
c . If the control system does go into safety shutdown,
turn off all the controls and switch off the power
supply for a few seconds .
d . Then turn the power back on and repeat steps 2 . to
3 .c . until the gas ignites .
Note: If the power supply is not switched off, then a
delay of 90 seconds will be required after each safety
shutdown before a new ignition cycle can be attempted .
For more details about how the Electronic Burner Control
works refer to 'Electronic Burner Control' .
4 . Check the manometer zero point is correct .
5 . Connect the manometer to the cooker pressure test point .
This is located on the regulator or LPG inlet fitting.
NOMINAL tESt pOINt OvEN
pRESSURE (KpA) INjECtOR
1 .00 1 .50
2 .75 0 .82
6 . Check the operating pressure (refer table above) .
For LPG Cookers: Adjust the regulator if necessary
(this may be remote from the cooker) .
For NG Cookers: The outlet pressure should not vary from
the nominal outlet pressure of 1 . 0 0kPa by more than ±0 . 2 0kPa .
If the regulator appears to not be performing satisfactorily,
then check the following points:
a . 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.
b . 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 .
7 . Observe the flame appearance on the burner . If it
is much larger or much smaller than expected, the
injector size may require checking . Where a flame
is unsatisfactory refer to the servicing instructions and
correct the fault if possible .
8 . Check the operation of the timer, light and fan .
If the appliance cannot be adjusted to perform correctly,
inform the customer of the problem and affix an appropriate
warning notice to the appliance . If the fault appears to
be dangerous, the appliance should be disconnected .
However, if only a minor fault exists, the customer may
wish to use the appliance while awaiting service .
The customer should be advised that, in the event of a fault,
they should contact the manufacturer's local service organisation
or the retailer from whom the appliance was purchased .
INSTALLATION
25