L.B. White Tradesman CP400, Owner'S Manual And Instructions

Page: 19 / 120

Tradesman Construction Heaters
Owner’s Manual • Tradesman
19
Variable Rate Valve and
Gas Control Valve
1. Loosen the compression nut at the outlet of the
variable rate valve. See Figs. 22 or 23 depending on
heater model.
2. Remove the screws securing the valve bracket to the
heater.
3. Remove the valve assembly from the heater and
replace components as needed.
TRADESMAN 170
FIG. 22
TRADESMAN 400
FIG. 23
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.
2. Disconnect the heater from the electrical supply and
close the fuel supply valve to the heater inlet.
3. Remove case panels or base as necessary for access
to the gas control valve.
4. Brush or blow off any dust and dirt on or in the vicinity
of the gas control valve.
B. Gauge Installation
1. Using a 3/16 in. allen wrench, remove the pressure tap
plug on the gas control valve and install the appropriate
gauge. See Figs. 24, 25, and 26. (Ensure gauge tube
is not pinched).
TRADESMAN 170
FIG. 24
TRADESMAN 400
FIG. 25
GAS CONTROL VALVE
COMPRESSION NUT
VARIABLE RATE VALVE SCREWS
COMPRESSION NUT
GAS CONTROL VALVE
VARIABLE RATE VALVE
SCREWS
PLUG
PLUG