L.B. White Pilot - Manual (Page 72)

Equipment R Required:
Certified Leak Detectors
1 - 3/16 Hex Head Allen Key
2 - Low Pressure Gauge Kits,
Part Number 550-00764
ATTENTION
This procedure is to be done once a year prior to the heating
season, any time the appliance is moved from one location
to the other, or after servicing the heater.
ATTENTION
■ The following explains a typical procedure to be followed
in checking gas pressures on control valves.
■ The gas pressures will vary depending upon heater
model and fuel type.
■ Consult the dataplate or the heater specification on
pages 4 and 5 in this guide for specific pressures to be
used in conjunction with this procedure.
■ 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.
A. Preparation
1. Make sure all threaded connections to the inlet of the
control valve are tightened securely. Obtain two
pressure gauges capable of reading up to 35 in. W.C.
2. Disconnect the heater from the electrical supply and
close the fuel supply valve to the heater inlet.
3. Open or remove the burner access panel. Remove the
protective cover from over the control valve, if
applicable.
4. Brush or blow off any dust or dirt on or in the vicinity
of the gas control valve.
B. Gauge IInstallation
1. Locate the inlet and outlet pressure taps.
2. Using a 3/16 in. allen key, remove the taps at the inlet
and outlet of the control valve and install a threaded
gauge adapter and a low pressure gauge at these
points. Since some heaters used control valves from
different manufacturers, the location of the pressure
taps may vary slightly.
Leak and Gas Pressure Checks
Servicing
Instructions
WARNING
Fire aand EExplosion H Hazard
■ Do not disassemble the gas control valve.
■ Do not attempt to replace any components on the
gas control valve.
■ The gas control valve must be replaced if any physical
damage occurs to the control valve assembly.
■ Failure to follow this warning will result in fire or
explosions, leading to injury or death to humans and
livestock, and building damage.
August 1999
8.9-1 1
Inlet
Pressure
Tap
Outlet
Pressure
Tap