Gas Pressure Checks - L.B. White Premier 350 Owner's Manual And Instructions

28
Premier Ductable Heaters
FIG. 35
5. Remove burner retaining bolt from under base at gas
control end of heater. See Fig. 36.
FIG. 36
Bolt
6. Lift and pivot the gas train assembly so orifi ce is
exposed. See Fig. 37, Dual Fuel shown. Replace control
valve or orifi ce if needed.
FIG. 37
Orifi ce
Owner's Manual • Premier 350

Gas Pressure Checks

WARNING
Burn Hazard
■ Do not disassemble the gas control valve.
■ Do not attempt to replace any components of 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 fi re
or explosions, leading to injury or death to
humans, and property damage.
ATTENTION
■ The following explains a typical procedure to be
followed in checking gas pressures.
■ The gas pressures will vary depending upon fuel
type.
■ Consult the dataplate on the heater or page 4 in
this manual for specifi c 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.
MATERIALS REQUIRED
Quantity Description
2 Gas pressure gauges capable of
reading up to 35 in.W.C./8.7 kPa.
(Available from L.B.White Company
if desired)
A. Preparation
1. Disconnect the heater from the electrical supply
and close the fuel supply valve to the heater.
2. Open the case access panel at burner end of
heater.
3. Brush or blow off any dust or dirt in the vicinity of
the gas control valve.
B. Gauge Installation
1. Locate the gas control pressure taps. See Fig.
38 for single stage valve, or Fig. 39 for two stage
valve. Remove the pressure tap plugs using a 3/16
in. allen key.