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Premier Ductable Heater
Owner’s Manual • Premier Ductable Heater
15
WARNING
Burn Hazard
■ Heater surfaces are hot for a period of time after
the heater has been shut down.
■ Allow the heater to cool before performing service,
maintenance, or cleaning.
■ Failure to follow this warning will result in burns
causing injury.
WARNING
Fire and Explosion Hazard
■ Do not disassemble or attempt to repair any heater
components or gas train components such as gas
valves, or gas hoses.
■ All component parts must be replaced if defects
are found.
■ Failure to follow this warning will result in fire or
explosions, causing property damage, injury, or
death.
• Review all heater markings (i.e. wiring diagram, warnings,
start-up, shut-down, troubleshooting, etc.) at the time of
maintenance for legibility. Make sure none are cut, torn,
or otherwise damaged. Any damaged markings must be
replaced immediately by contacting the L.B. White Co.,
LLC. Data plate, startup and shut-down instructions and
warnings are available at no cost.
MONTHLY:
• Lubricate the bearings once a month. Use NLGI grade 2
mineral oil lithium or lithium base grease.
ANNUALLY:
• Clean and check the igniter for cracks. Replace if
necessary.
• Regulators can wear out and function improperly. Have
your gas supplier check the date codes on all regulators
installed and check delivery pressures to the heater to
make sure that the regulator is reliable.
• Test both auto reset high limit heat switches to ensure
proper operation. (See testing instructions in this owner’s
manual.)
Service Instructions
1. Close the fuel supply valve to the heater and
disconnect the electrical supply before servicing unless
necessary for your service procedure.
2. Clean the heater’s orifice with compressed air or a soft,
dry rag. Do not use files, drills, broaches, etc. to clean
the orifice hole. Doing so will enlarge the hole, causing
combustion or ignition problems. Replace the orifice if it
cannot be cleaned properly.
3. The high limit switches, heat/vent switch and
thermostat can be tested by disconnecting the leads at
the component and jumpering the leads together.
-- Reconnect the electrical supply and open fuel supply
valves.
-- If the heater lights, the component is defective and must
be replaced.
-- Do not leave the jumper on or operate the heater if the
part is defective. Replace the part immediately.
-- An alternate method for checking the components is to
perform a continuity check..
4. The air pressure switches must not be jumpered. If
jumpered, the ignition control will not allow heater
operation. Test the air pressure switch for continuity. If
defective, replace the switch
5. Open the respective case panel for access to burner or
fan related components.
6. For reassembly, reverse the respective service
procedure. Ensure gas connections are tightened
securely.
7. After servicing, start the heater to ensure proper
operation and check for gas leaks.
8. If pulley or fan keys are lost during service,
replacements are made by using 3/16 in. (4.7 mm.)
square x 1 in. (2.54 cm) bar stock. Otherwise, order
Part #22955.
Belt Replacement
1. Remove the belt guard from the heater. See Fig. 5.
2. Rotate the fan pulley CCW while carefully lifting the belt
so it clears the fan pulley groove. See Fig.6.
3. Check the fan and motor pulleys for dirt. Clean the
pulleys if needed.