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L.P. Gas
Dryers made for use with L.P. gas have the gas valve's internal
pressure regulator blocked open so that the gas pressure must
be regulated upstream of the dryer. The pressure measured
at each gas valve pressure tap must be a consistent 10.5 in
WC (26.1 mb). There is no regulator or regulation provided in
an L.P. dryer. The water column pressure must be regulated
at the source (L.P. tank) or an external regulator must be added
to each dryer.
TYPE OF GAS (PER POCKET)
Natural
Btu/hr
kcal/hr
Rating
Rating
Qty.
D.M.S.*
72,000
18,143
1
#20
Liquid Propane Conversion Kit Part Number 884439
Shaded area is stated in metric equivalent
* D.M.S. equivalents are as follows:
Natural Gas ................ #20 = 0.161" (4.089 mm).
L.P. Gas ...................... #41 = 0.096" (2.438 mm).
Piping Connections
All components/materials must conform to National Fuel Gas
Code Specifications ANSI Z223.1-LATEST EDITION, or in
Canada, CAN/CGA-B149.1-M91 (Natural Gas) or CAN/CGA-
B149.2-M91 (L.P. Gas) or LATEST EDITION (for General
Installation and Gas Plumbing), as well as local codes and
ordinances and must be done by a qualified professional. It
is important that gas pressure regulators meet applicable
pressure requirements, and that gas meters be rated for the
total amount of all the appliance Btu being supplied.
The dryer is provided with one 1/2" N.P.T. inlet pipe connection
extending out the top left corner of the dryer (refer to page 6).
It is recommended that a gas shutoff valve be provided to the
gas supply line of each dryer for ease in servicing.
An 1/8" N.P.T. plugged tap, accessible for a test gauge
connection, must be installed in the main gas supply line
immediately upstream of each dryer.
IMPORTANT: Pipe joint compounds that resist the action of
natural gas and L.P. gas must be used.
Test all connections for leaks by brushing on a soapy water
solution (liquid detergent works well).
WARNING
!
NEVER TEST FOR LEAKS WITH A FLAME!!!
The size of the main gas supply line (header) will vary
depending on the distance this line travels from the gas meter
or, in the case of L.P. gas, the supply tank, other gas-operated
appliances on the same line, etc. Specific information
regarding supply line size should be determined by the gas
supplier.
NOTE: Undersized gas supply piping can create a low or
inconsistent pressure, which will result in erratic operation
of the burner ignition system.
12
Liquid Propane
Part No.
Qty.
D.M.S.*
Part No.
140908
1
#41
140909
American Dryer Corp.
Preparation for Operation / Start-Up _
The following items should be checked before attempting to
operate the dryer:
Read all "caution," "warning," and "direction" labels attached
to the dryer.
Check incoming supply voltage to be sure that it is the same
as indicated on the dryer data label.
Gas Models – check to ensure that the dryer is connected to
the type of heat/gas indicated on the dryer data label.
The sail switch damper assembly was installed and adjusted
at the factory prior to shipping. However, each sail switch
adjustment must be checked to ensure that this important
safety control is functioning.
Check bolts, nuts, screws, terminals, and fittings for tightness.
Gas Models – be sure that all gas shutoff valves are in the
open position.
Be sure all back guard panels and service box covers have
been replaced.
Check the lint door to ensure that it is closed and secured in
place.
Rotate the tumbler by hand to be sure it moves freely.
113019 - 7
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