Gas Pressure Checks - L.B.White Oval-U 100 Manual De Instrucciones

Gas Pressure Checks

■ The following is a typical procedure to be fol-
lowed 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. (may also be
ordered from L.B. White, part number
00764)
1 Bushing, 1/2 in.x 1/8 in.
1 1/8 in. barbed fitting
1 3/16 in. allen key
A. Preparation
1. Disconnect the heater from the electrical supply
and close the fuel supply valve to the heater inlet.
2. Remove the lower nipple and cap from the sedi-
ment trap and install the bushing and 1/8 in. NPT
barbed fitting. See Fig. 22.
FIG. 22
BUSHING
1/8" NPT
BARBED
FITTING
Owner's Manual • Oval-U 100
Oval-U 100
Radiant Tube Heaters
3. Open the burner box access panel.
4. Locate and remove either the inlet or outlet pres-
sure tap on gas control valve. See FIG. 23.
FIG. 23
5. Attach pressure barb and hose to either the gas
valve inlet or outlet to measure gas pressure.
Securely tighten the pressure barb.
6. Open the fuel supply valves to the heater, recon-
nect the heater's electrical supply, and start the
heater.
B. Reading Pressures
1. With the heater operating, the pressure gauges
should read the pressures specified on the
dataplate. See Fig. 24.
2. Do the readings at the inlet and outlet pressure
gauges agree with that specified on the data-
plate? If so, then no further checking or adjust-
ment is required. Proceed to section "C".
3. If the inlet pressures do not agree with that
specified on the dataplate, then the regulator
controlling gas pressure to the heater requires
adjustment.
GAUGE
4. If the inlet pressure is correct but the burner
manifold pressure does not agree with that speci-
fied on the dataplate, then the pressure regulator
internal to the gas control requires adjustment.
Refer to the following instructions. The burner
box will need to be opened and closed/latched
as needed to accurately set the gas control
pressures.
5. If manifold gas pressure is different than
dataplate, remove the internal pressure regulator
cap and adjust the internal pressure regulator
clockwise or counter clockwise. See Fig. 24.
Radiant Tube Heaters
Outlet Pressure Tap
21
Inlet Pressure
Tap
Internal
Regulator Cap