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Exhaust and Venting
DRYER AIR FLOW
INSTALLATION
FOR BEST DRYING
FOR BEST DRYING
OTHER
RECOMMENDATIONS
TROUBLESHOOTING
Nothing is more important than air flow for the proper operation of a clothes
dryer. A dryer is a pump which draws make-up air from the out-of-doors,
through the heater, through the clothes and then forces the air through the
exhaust duct back to the out-of-doors. Just as in a fluid water pump, there
must be the proper fluid air flow out of the exhaust duct.
In summary, there must be the proper size out-of-doors inlet air
opening (4-6 times the combined areas of the air outlet) and an
exhaust duct, with appropriate size and length, to allow air flow
through the dryer with no more than 0.3 w.. c. (.75 mbar) static
pressure in the exhaust duct.
In some instances, special fans are required to supply make-up air,
and/or boost exhaust fans are required for both regular and energy
savings models.
FOR BEST DRYING:
1. Exhaust duct maximum length 14 feet (5 m) of straight
duct and maximum to two 90º bends.
2. Use 45º and 30º elbows wherever possible.
3. Exhaust each dryer separately.
4.
Do not
install wire mesh or other restrictions in the
exhaust duct.
5. Use clean-outs in the exhaust duct and clean periodically
when needed.
6.
Never
exceed 0.3 inches w. c. (.75 mbar) static pressure in
the exhaust duct.
7. Inside surface of the duct
must be smooth.
8. Recommend pop rivets for duct assembly.
FOR BEST DRYING:
1. Provide opening to the out-of-doors in accordance with the
following:
For each dryer -
8 inches (204 mm) diameter exhaust requires 2 square feet
(.1858 m²) make-up air.
12 inches (305 mm) diameter exhaust requires 4 square feet
(.3716 m²) make-up air.
2. Use barometric shutters in the inlet air opening to control
air when dryers are not running.
OTHER RECOMMENDATIONS
To assure compliance, consult local building code requirements.
TROUBLESHOOTING
Hot dryer surfaces, scorched clothes, slow drying, lint
accumulations, or air switch malfunction are indicators of exhaust
duct and/or make-up air problems.
Summary of Contents for HD150.1
Page 10: ...Page 10 150 lb Gas Fired Dryer Illustration ...
Page 13: ...Page 13 Gas Piping Installation Illustration ...
Page 15: ...Page 15 150 lb Steam Heated Models Illustration ...
Page 22: ...Page 22 Dryer Installation with Multiple Exhaust Illustration ...
Page 30: ...Page 30 Two Timer Models Figures 1 2 and 3 Illustrations ...
Page 38: ...Page 38 DIRECT SPARK IGNITION OPERATION FLOW CHART ...
Page 42: ...Page 42 Basket Alignment for 150 lb Dryers Illustrations ...
Page 44: ...Page 44 Shimming the Basket and Spider Assembly Illustration ...
Page 67: ...Page 67 ...