INSTALLATION PROCEDURES
3-6
IMPORTANT: Make – up air must be provided from a source free of dry cleaning solvent
fumes. Make – up air that is contaminated by dry cleaning solvent fumes will
result in irreparable damage to motors and other dryer components.
NOTE: Component failure due to dry cleaning solvent fumes. VOID THE
WARRANTY.
1. General Exhaust Duct Work Information
Exhaust duct work should be designed and installed by a qualified professional. Improperly
sized duct work will create excessive back pressure which results in slow drying, increased use of
energy, overheating of the dryer, and shutdown of the burner by the air flow (sail) switches, burner
hi – limits, or basket (tumbler) hi – heat thermostats.
CAUTION: Dryer must be exhausted to the outdoors.
CAUTION: Improperly sized or installed exhaust duct work can create POTENTIAL FIRE
HAZARD.
NOTE: When a dryer is exhausted separately, it is recommended that a back draft damper
be installed.
NOTE: When dryers are exhausted into a multiple (common) exhaust line, each dryer
must be supplied with a back draft damper.
The duct work should be laid out in such a way that the duct work travels as directly as
possible to the outdoors with as few turns as possible. Single or independent dryer venting is
recommended. When single dryer venting is used, the duct work from the dryer to the outside
exhaust outlet should not exceed twenty (20) feet.
In the case of multiple (common) dryer venting, the distance from the last dryer to the
outside exhaust outlet should not exceed twenty (20) feet. The shape of the duct work is not critical
so long as the minimum cross section area is provided. It is suggested that the use of 90° turns in
ducting be avoided use 30° and / or 45° angles instead. The radius of the elbows should preferably
be 1 – 1/2 times the diameter of the duct. Excluding basket / dryer elbow connections or elbows
used for outside protection from the weather, no more than two (2) elbows should be used in the
exhaust duct run. If more than two (2) elbows are used, the cross section area of the duct work must
be increased in proportion to number of elbows added.
All duct work should be smooth inside with no projections from sheet metal screws or other
obstructions which will collect lint. When adding ducts, the duct to be added should overlap the
duct to which it is to be connected. All duct work joints must be taped to prevent moisture and lint
from escaping into the building. Inspection doors should be installed at strategic points in the
exhaust duct work for periodic inspection and clean – out of lint from the duct work.
IMPORTANT: Exhaust back pressure measured by a manometer at each basket exhaust duct area
should not exceed 0.3 inches of water column.
NOTE: Where the exhaust duct work passes through a wall, ceiling, or roof made of
combustible materials, the opening must be 2 – inches larger (all the way around)
than the duct. The duct must be centered within this opening.
To Next Page
Loading...
