L.B. White Tradesman 400 Dual Fuel, Инструкция и руководство пользователя, Страница: 20 / 120

Tradesman Construction Heaters
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Owner’s Manual • Tradesman
20
Gas Pressure Checks
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 speci
fi c pressures to be used in conjunction
with this procedure. Gas pressure measured at the gas
control valve will verify proper inlet and burner manifold
pressures.
A. Preparation
Tradesman 170 heaters:
■ Obtain a pressure gauge capable of reading up to
35 in. W.C.
Tradesman 400 heaters:
■ Obtain a pressure gauge capable of reading up to
10 PSIG.
1. Disconnect the heater from the electrical supply and
close the fuel supply valve to the heater inlet.
2. Remove case panels or base as necessary for access
to the gas control valve.
3. Brush or blow off any dust and dirt on or in the vicinity
of the gas control valve.
B. Gauge Installation
■ Using a 3/16 in. allen wrench, remove the pressure tap
plug on the gas control valve and install the appropri-
ate gauge. See Figs. 24, 25, as shown. (Ensure gauge
tube is not pinched).
TRADESMAN 170 SHOWN
FIG. 24
TRADESMAN 400
FIG. 25
C. Reading Pressures
1. With the heater operating, the pressure gauge must
read the pressures speci fi ed on the dataplate
2. Does the reading at the gas control valve agree with
that speci fi ed on the dataplate? If so, then no further
checking or adjustment is required. Proceed to section
D.
3. If the inlet pressures do not agree with that speci fi ed
on the dataplate, then the regulator controlling gas
pressure to the heater requires adjustment.
D. Completion
1. Once the proper pressure has been con fi rmed and/
or properly set, close the fuel supply to the heater and
allow the heater to burn off any gas remaining in the
gas supply line.
2. Disconnect the heater from its electrical supply.
3. Remove the gauge.
4. Install pressure tap plug and tighten securely
5. Open the fuel supply and start the heater. Check for
gas leaks at the plug Set heater’s thermostat to desired
temperature.
PLUG