Installation manual

60
4. Impellor (fan/blower) is rotating in the wrong direction (for 3-phase [3ø] models only).
5. Lint screen is dirty or is not being cleaned often enough.
6. Inadequate airflow...
a. Impellor (fan/blower) failure.
GAS MODELS...
1. Low and/or inconsistent gas pressure.
Natural gas pressure ........................... 3.5 inches (8.7 mb) of water column (W.C.).
Liquid propane (L.P.) gas pressure ...... 10.5 inches (26.1 mb) of water column.
2. Poor air/gas mixture (too much gas or not enough air) at the burner, yellow or poor flame pattern...
a. Not enough make-up air.
b. Restriction in the exhaust ductwork.
c. Gas pressure too high.
d. Impellor (fan/blower) is rotating in the wrong direction (for 3-phase [3ø] models only).
e. Burner orifice size (drill material size [D.M.S.]) too large for application (i.e., high elevation).
3. Sail switch is fluttering...
a. Restriction in the exhaust ductwork...
1) Lint screen is dirty or is not being cleaned often enough.
4. Gas supply may have too low a heating value.
ELECTRIC MODELS
1. Not enough make-up air.
2. Restriction in the exhaust ductwork.
3. Lint screen is dirty or is not being cleaned often enough.
4. Impellor (fan/blower) is rotating in the wrong direction (for 3-phase [3ø] models only).
5. Failed electric element(s).
6. Sail switch is fluttering...
a. Restriction in the exhaust ductwork.
b. Sail switch is not adjusted properly.