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Page 2-5
MEASURING GAS PRESSURE
Gas pressure is measured in
Inches of Water Column Pressure (WCP)
. It takes 28
"
WCP to
equal one pound per-square-inch (PSI).
In most locations, natural gas pressure entering the home is regulated to 7 inches water column.
L.P. gas is regulated between 10 and 12 inches water column. The appliance regulator reduces
the incoming pressure to the required amount for the appliance. The model/serial plate on the gas
range (see Figure 2-8) provides information about the proper water column pressure. Whirlpool
ranges operate on 4 inches water column on natural gas, and 10 inches WCP on L.P.
it becomes necessary to measure these pressures, two instruments are available: a manometer,
and a magnehelic gauge.
4
4
3
3
2
2
1
1
0
Balanced
Water Columns
Hose
Figure 2-8
WHIRLPOOL, U.S.A., BENTON HARBOR, MI 49022
THIS UNIT IS FACTORY ADJUSTED FOR NAT. GAS BUT
MAY BE USED WITH LP/PROPANE OR NAT. GAS
MODEL:
SFV360BEEW-E
SERIAL:
TGENG006
120V 60 HZ 10A
BTU RATINGS RF LF RR LR BAKE BROILER
9500 9500 6500 7500 16500 10000
8500 8500 5500 6500 15500 9000
4" WC NAT.
10" WC LP
When it becomes necessary to measure these pressures, there are two instruments available that
you can use: a manometer and a magnehelic gauge.
A manometer is basically a U-shaped tube with a scale, marked in inches of water column. To
prepare and use the manometer, use the following steps:
1. Check the appliance model/serial plate and note the gas pressure
rating.
2. Turn off the gas pressure to the range.
3. Prepare the manometer by filling the U-shaped tube with water so
that both sides of the tube fill to the
zero
point (see Figure 2-9).
NOTE: Use a little food coloring in the water to help make reading
the meter easier.
4. Connect the tubing that is supplied with the manometer over one
end of the manometer.
5. Remove a burner from the appliance and place the free end of the
tubing over the burner orifice.
6. Turn on the gas supply to the range.
7. Turn on the gas valve to the orifice being tested and light at least
one other burner to serve as a load.
Figure 2-9