Start-Up Instructions; Shut-Down Instructions; Variable Rate Valve - L.B. White CP400 Owner's Manual And Instructions

The following instructions pertain to heaters with a selector
switch and thermostat.
n
Heaters with thermostat only: follow steps 1,2,4,
and 5.
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Heaters without thermostat and selector switch:
follow steps 1,2, and 5.
1. Open all manual fuel supply valves. Check for gas
leaks using an approved leak detector.
2. Connect the heater to an approved electrical supply.
Selector Switch
A selector switch, located on the side panel of the
heater, allows operation in either HEAT or VENT
modes, and provides a convenient shut-off. See Fig.
5.
HEAT Mode Operation
-- Push the selector switch to HEAT
FIG. 5
SELECTOR
SWITCH
If the heater is to be shut down for cleaning, maintenance,
or repair, follow steps 1-5, where appropriate. Otherwise
turn the thermostat (if supplied) to a lower setting.
1. Close the gas supply valve.
2. Allow the heater to burn off any fuel gas remaining
in the gas supply line.
The variable rate valve is used for adjusting the heat
output from low to high heat, or anywhere in-between.
See Fig. 6.

Start-Up Instructions

4. Set the thermostat above room temperature. The
thermostat cycles the heater on and off based on
setting.
-- Fan motor starts.
-- Igniter sparks.
-- Gas valve opens.
-- Ignition occurs.
(It is normal for air to be trapped in the gas hose on
new installations. The heater may attempt more than
one trial for ignition before air is finally purged from
line and ignition takes place.)
VENT Mode Operation
-- Push the selector switch to OFF, then to VENT.
-- Only the fan motor will operate. The igniter will
not spark, nor will ignition occur.
The VENT feature is used when air circulation is
required. The heater will not cycle on its thermostat
setting. To discontinue ventilation, position the
switch to OFF or HEAT.
OFF
Position the switch to midpoint.
5. Do not exceed input rating stamped on nameplate or
manufacturer's recommended burner orifice
pressure for size orifice(s) used. Make certain that
the primary air supply to main burner is open and
free of dusk, dirt and debris for complete, proper
combustion.

Shut-Down Instructions

3. Set the thermostat to its lowest setting.
4. Position the selector switch to OFF.
5. Disconnect the heater from its gas and electrical
supplies.

Variable Rate Valve

FIG. 6
10 14