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PGD4 Series K WPG4 Series K: Installation Instructions
SYMPTOM
Burners will not ignite
Inadequate heating
Poor flame characteristics
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
Table 14 – Troubleshooting Guide–Heating
CAUSE
Water in gas line
No power to furnace
No 24-v power supply to control circuit
Mis-wired or loose connections
Misaligned spark electrodes
No gas at main burners
Dirty air filter
Gas input to furnace too low
Unit undersized for application
Restricted airflow
Limit switch cycles main burners
Incomplete combustion results in: Aldehyde odors,
carbon monoxide, sooting flame, floating flame
Drain. Install drip leg.
Check power supply fuses, wiring or circuit breaker.
Check transformer.
NOTE: Some transformers have internal over-current protection
that requires a cool-down period to reset.
Check all wiring and wire nut connections
Check flame ignition and sense electrode positioning.
Adjust as necessary.
1. Check gas line for air. Purge as necessary. NOTE: After
purging gas line of air, wait at least 5 minutes for any gas to
dissipate before attempting to light unit.
2. Check gas valve.
Clean or replace filter as necessary
Check gas pressure at manifold match with that on unit
nameplate
Replace with proper unit or add additional unit
Clean or replace filter. Remove any restriction.
Check rotation of blower, temperature rise of unit. Adjust as
necessary.
1. Tighten all screws around burner compartment
2. Cracked heat exchanger. Replace.
3. Unit over-fired. Reduce input (change orifices or adjust gas line
or manifold pressure).
4. Check burner alignment.
5. Inspect heat exchanger for blockage. Clean as necessary.
51
REMEDY
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