3. MAKE-UP AIR: Adequate make-up air must be supplied to replace air exhausted by dryers on
all types of installations. Refer to specications for the minimum amount of make-up air opening
to outside for each dryer. This is a net requirement of eective area. Screens, grills or lou
vers, which will restrict the ow of air, must be considered. Consult the supplier to determine the
free area equivalent for the grill being used. The source of make-up air should be located
suciently away from the dryers to allow an even airow to the air intakes of all dryers. Multiple
openings should be provided.
The sources of all make-up air and room ventilation air movement to all dryers must be located
away from any dry cleaners. This is necessary so that solvent vapors will not be drawn into
the dryer inlet ducts. Dry cleaner solvent vapors will decompose in contact with open ame
such as the gas ame present
in clothes dryers. The decomposition products are highly corrosive and will cause damage to the
dryer(s) ducts and clothes loads.
4. ELECTRICAL REQUIREMENTS. The electrical power requirements necessary to operate the
unit satisfactorily are listed on the serial plate located on the back panel of each dryer and
in the specications section of this manual. The electrical connection should be made to the ter
minal board, on the rear of the unit. It is absolutely necessary that the dryer be grounded
to a known ground. Individual circuit breakers for each stacked dryer are required. Dryer
-65 models are adjusted for 120V as shipped. They can be converted to 208-240V
(neutral required) as required. Instructions for this conversion are located at this
end of this manual.
5. GAS REQUIREMENTS. The complete gas requirements necessary to operate the dryer satisfacto
rily are listed on the serial plate located on the back panel of the dryer and in the specications
section of this manual. The inlet gas connection to the unit is 1/2-inch pipe thread. However, the
size of the piping to supply the dryer should be determined by reference to the National Fuel Gas
Code ANSI Z223.1A and consultation with the local gas supplier. An individual gas shuto valve is
recommended for each dryer and may be required by local code (not supplied).
A joint compound resistant to the action of liqueed petroleum gases should be employed in mak
ing pipeconnections. A 1/8-inch NPT plugged tapping, accessible for test gage connection, must be
installed immediately upstream of the gas supply connection to the dryer. A drip tee is provided in
the unit gas piping to catch dirt and other foreign articles. All pipe connections should be checked
for leakage with soap solution. Never check with an open ame. For altitudes above 2,000 feet
(610m), it is necessary to derate the BTU input. Contact your local distributor for instructions.
L.P. gas conversion kits are available for this dryer. Contact your local distributor.
CAUTION: The dryer must be disconnected from the gas supply piping system during any pres
sure testing of that system. Do not expose the dryer’s gas control valve to testing pressure.
Burner Set-Up
All gas burner manifolds should be checked for proper gas pressure while burning. Stack dryer
burners should be set at 3.5 W.C. while burner operating.
19
Part # 8533-090-001 7/21
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