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Premier Ductable
Heater
www.lbwhite.com
Owner’s Manual •
Premier 350DF 2.0
26
PROBLEM
CAUSE
CURE
Belt Slips
Pulleys worn (Belts bottoming out in grooves)
Replace pulleys
Oil or grease on belt
Clean pulleys or belt.
Belt Breaks
Improper belt installation
Belt pried over pulleys
using sharp or pointed
tools. Install new belt
properly.
Belt Jumps Pulley
Drive misaligned
Check and realign
Grooves
Dirt entering pulley
Remove belt, clean the
pulleys
Belt hitting belt guard
Realign guard (check
for loose or missing
guard screws)
Belt Cracking
Dirt or grease on belt or aged belt
Remove dirt or
replace belt.
Belt Wearing Rapidly
Belt hitting belt guard
Realign guard (check
for loose or missing
guard screws)
Worn pulleys
Replace pulley
Dirt in pulleys
Remove dirt
IGNITION FAILURE SEQUENCE:
-- Trial for ignition takes approximately 180 seconds.
-- If ignition module does not sense a flame within
each ignition trial,
-- Gas valve closes.
-- Ignition spark shuts off.
-- The ignition module will pre-purge for 60 seconds
before another ignition trial.
-- If ignition is not establish within the 3 ignition trials,
the module goes into safety lockout.
-- Fan motor stops.
-- To retry for ignition, the systems must be reset:
-- Turn the thermostat down and then up to call for
heat or unplug heater and plug it back in or
-- Position selector switch to off and then back to on.
Fan Drive Components Troubleshooting
Refer to the following table to identify basic problems, causes and cures associated with V-Belt drive systems.
• Ignition control sends high voltage to the igniter
electrode.
- Igniter sparks.
• Ignition control (MV) sends 24 volts to the gas control
valve through the high limit switch(es).
- Gas valve light is activated indicating that gas control
valve is receiving 24 volts.
- Gas control valve opens.
- Ignition occurs.
• Igniter continues to spark until flame proving occurs.
- Ignition spark is cut off.
- Gas valve stays open.
• Room warms to desired temperature.
- Thermostat is satisfied.
- Gas control closes, burner shuts down.
•
Fan motor continues to run for 1 minute, cooling the
heat chamber.
- Fan motor stops.
- Heater shuts off.
• Process starts again on a call for heat.