L.B. White Oval 80™ Radiant - Manual (Page 22)

■ The following is a typical procedure to be followed in
checking gas pressures.
■ Consult the dataplate on the heater or page 4 in this
manual for specific pressures. The gas pressures will
vary depending upon fuel type.
■
Gas pressure measured at the inlet to the gas valve is
Inlet Pressure and gas pressure measured at the outlet
of the gas valve is Burner Manifold Pressure.
MATERIALS REQUIRED
Quantity Description
2 Gas pressure gauges capable of reading up to
35 in. W.C. (part number 00764, includes 1/8
NPT barbed fitting)
1 1/2 in. x 1/8 in. bushing
A. Preparation
1. Remove the lower nipple and cap from the sediment
trap, and install the bushing and barbed fitting at the
tee. See Fig.34.
FIG. 34
2. Open the burner box door, and remove the plug from
the conector near the power cord and route the gauge
tubing through the connector. See Fig. 33. Keep the
connector’s plug.
3. If the connector is occupied by thermostatwiring,
remove the air inlet tube from the burner box and rout
e the gauge’s tubing through the burner box air inlet
to the gas control valve. See Fig. 35.
FIG. 35
4 Remove the pressure tap plug from the outlet of gas
control valve. Install the fitting and securely connect
a pressure gauge. See Fig.34.
3. Close and latch the burner box. Open the fuel supply
valves to the heater, reconnect the heater’s electrical
supply, and start the heater.
MOTOR AND FAN ASSEMBLY
1. Remove fan housing mounting nuts. See Fig. 32.
2. Tilt the motor and fan assembly slightly and pull
upward.
FIG. 32
3. Remove inlet side of housing. See Fig. 33. Loosen
set screw on fan hub with a 1/8 in. allen wrench.
4. Pull fan wheel from housing. Remove nuts holding
housing to motor mounting studs.
FIG. 33
NUTS NUTS
Gas Pressure Checks
22