Westinghouse WHG638BC, User Manual

Page: 14 / 20

14
OPERATION ON N.G./S.N.G.
4. 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 1.00kPa by more
than +/–0.20kPa.
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.
inlet
Figure 9
manifold endform
female nut
flat face
outlet
regulator
sealing washer
” parallel thread
” tapered thread seal using
approved sealing tape or
approved thread sealing
compound
BURNER TYPE
NATURAL GAS
(NOMINAL TEST POINT PRESSURE: 1.00KPA)
LPG
(NOMINAL TEST POINT PRESSURE: 2.60KPA)
INJECTOR SIZE (MM) GAS CONSUMPTION
(MJ/H)
INJECTOR SIZE (MM) GAS CONSUMPTION
(MJ/H)
Small burner 1.00 5.1 0.55 4.0
Medium burner 1.35 9.0 0.70 6.5
Large burner 1.60 12.1 0.90 10.7
Wok burner 1.75 14.4 1.00 13.0
Dual Wok burner 0.96 x 4 17.0 0.52 x 1 + 0.58 x 3 17.0
Dual Wok burner 0.96 + 1.07 x 3 19.0 0.52 x 1 + 0.58 x 3 17.0