Shut-Down Instructions; Gas Selector Valve (Premier 350 Df Heaters Only) - L.B.White TS350 Manual Del Usuario E Instrucciones

18
Premier Ductable Heaters
ing upon temperature requirements and thermostat
setting, the valve will then either remain at low heat rate
before the thermostat is satisfi ed, or the valve will open
completely to its total capacity.
5. Do not exceed input rating stamped on nameplate or
manufacturer's recommended burner orifi ce pressure
for size orifi ce(s) used. Make certain that the primary
air supply to main burner is open and free of dust, dirt
and debris for complete, proper combustion.

Shut-Down Instructions

If the heater is to be shut down for cleaning, mainte-
nance, or repair, follow steps 1-5. Otherwise, set the
thermostat to below room temperature for standard
shut-down. Do not shut the heater off by
the selector switch. Doing so will remove
power to the heater, preventing cooling of
heat chamber. The burner end high limit
switch will trip.
1. Close the gas supply valve.
2. Allow the heater to burn off any fuel gas remaining in
the gas supply line.
3. Set the thermostat below room temperature. When
the thermostat cycles the burner off , the
fan motor will continue to run for 1 min-
ute, allowing the heat chamber to cool.
After 1 minute, the fan motor will shut off .
4. Position selector switch to off O
5. Disconnect the heater from its gas and electrical
supplies.
Gas Selector Valve
Premier 350 DF Only
This heater is shipped from the factory with the
fuel selector valve in the propane gas (LP) position.
Ensure the fuel selector valve's handle is properly
positioned for the fuel being used.
1. This feature allows the heater to operate on either pro-
pane or natural gas without changing out the burner
orifi ce. The gas selector valve is located between
the gas control valve and the burner. Gas selection
is made by repositioning the valve's handle. THIS IS
NOT A MANUAL GAS SHUT OFF VALVE.
Owner's Manual • Premier 350
2. Refer to Figs. 12 and 13. The valve handle
must be properly positioned for the specifi c gas
being used, otherwise the unit will overheat or
underheat.
FIG. 12
Handle position
propane gas
FIG. 13
3. The handle must be fully set at 90 degrees to gas
fl ow (propane gas) or parallel to gas fl ow (natural
gas) for proper operation. Do not operate the
heater with the valve handle set between either
postion, otherwise improper operation will occur.
4. The valve's handle can be locked to prevent
improper positioning. Use the holes provided on
the valve's body and handle. See Fig. 14.
FIG. 14
Handle position
natural gas