Shut-Down; Fuel Selector Valve; Cleaning Instructions - L.B.White Boss 400 DF Manual Del Usuario E Instrucciones

Shut-Down Instructions
If the heater is to be shut down for cleaning, main-
tenance, or repair, follow steps 1-5. For normal shut
down, set the thermostat to a lower setting.
1. Close the fuel supply valve at the fuel source.
2. Allow the heater to burn off any gas remining in its
gas supply line.
3. Position the selector switch to OFF
4. Set the thermostat to its lowest setting.
5. Disconnect the heater from its gas and electrical
supplies.
Ventilation
With the VENT position engaged, only the
fan motor will operate. The heater will not spark nor
ignite. This position is used for air circulation only. To
discontinue the ventilation feature, position the switch
to OFF or HEAT.

Fuel Selector Valve

Allows the user to quickly select between propane or
natural gas depending on fuel available at the jobsite,
without making a gas conversion.
The heater ships with the selector valve in the
propane gas (LP) position from the factory. See
Fig. 9 Boss 400DF shown.
Ensure the valve is positioned for the gas being
used prior to starting the heater.
FIG. 9
LP
NG
Boss DF Construction Heaters

Cleaning Instructions

WARNING
Fire, Burn and Explosion Hazard
■ This heater contains electrical and mechanical compo-
nents in the gas management, and safety systems.
■ Such components may become inoperative or fail due
to dust, dirt, wear and aging.
■ Periodic cleaning and inspection as well as proper
maintenance are essential to avoid serious injury or
property damage.
1. Before cleaning, shut off all gas supply valves and
disconnect electrical supply.
2. The heater should have dirt or dust removed
periodically:
NOTE: Before each use clean the heater using com-
pressed air or a soft brush or dry rag on its case and
internal components. At this time, dust off the motor case
to prevent the motor from over-heating. Also ensure the
fan blade is free of material build-up.
Owner's Manual • Boss DF
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