Fan Drive Components Troubleshooting - L.B.White Premier 350 DF Instrucciones Y Manual Del Propietario

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Premier Ductable Heater
• 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 Drive Components Troubleshooting

Refer to the following table to identify basic problems, causes and cures associated with V-Belt drive systems.
PROBLEM
Belt Slips
Belt Breaks
Belt Jumps Pulley
Grooves
Belt Cracking
Belt Wearing Rapidly
Owner's Manual • Premier 350DF 2.0
CAUSE
Pulleys worn (Belts bottoming out in grooves)
Oil or grease on belt
Improper belt installation
Drive misaligned
Dirt entering pulley
Belt hitting belt guard
Dirt or grease on belt or aged belt
Belt hitting belt guard
Worn pulleys
Dirt in pulleys
- Fan motor stops.
- Heater shuts off.
• Process starts again on a call for heat.
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.
CURE
Replace pulleys
Clean pulleys or belt.
Belt pried over pulleys
using sharp or pointed
tools. Install new belt
properly.
Check and realign
Remove belt, clean the
pulleys
Realign guard (check
for loose or missing
guard screws)
Remove dirt or
replace belt.
Realign guard (check
for loose or missing
guard screws)
Replace pulley
Remove dirt