R. dryer is taking too long to dry, Gas models – American Dryer Corp. AD-385 User Manual
Page 56
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R. Dryer is taking too long to dry...
1. Exhaust duct work run too long or is undersized...back pressure cannot exceed 0.3 inches water
column.
2. Restriction in exhaust...
a. Dryer back draft damper is sticking partially closed.
b. Restriction/obstruction in duct work...
1) Check duct work from dryer all the way to the outdoors.
3. Insufficient make-up air.
4. Impellor (blower/fan) is rotating in the wrong direction (3-phase [30] Models ONLY).
5. Lint drawer screen is dirty or is not being cleaned often enough.
6. Inadequate air flow...
a. Impellor (blower/fan) failure.
7.
Gas Models
a. Low and/or inconsistent gas pressure...
1) Natural Gas pressure
must be
between 3.5 inches and 4.0 inches of water column.
2) Liquid propane (L.R) pressure
must be
between 10.5 inches and 11.0 inches of water
column.
b. Poor air/gas mixture (too much gas or not enough air) at bumer...yellow or poor flame
pattern...
1) Not enough make-up air.
2) Restriction in exhaust.
3) Gas pressure too high.
4) Impellor (blower/fan) rotating in the wrong direction.
5) Burner orifice size (D.M.S.) too large for application (i.e., high elevation).
c. Sail switch is fluttering...
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