ADC AD-444, Installation Manual

Page: 14 / 20

14 American Dryer Corp. 112174-7
TYP E OF GAS
Btu/hr
Rating *
kcal/hr
Rating *
Natural Liquid Propane
Qty. * D.M.S. ** Part No. Qty. D.M.S. ** Part No.
106,000 26,711 1 #11 140847 1 #31 140818
Liquid Propane Conversion Kit Part Number 884419
Type of Gas
Manifold Pressure * In-Line Pressure
Natural
3.5 in wc
6.0 - 12.0 in wc
8.7 mb 14.92 - 29.9 mb
Liquid
Propane
10.5 in wc 11.0 in wc
26.1 mb 27.4 mb
Technical Gas Data
Gas Specifications
Shaded areas are stated in metric equivalents
* Measured at outlet side of gas valve pressure tap when gas valve is on.
Gas Connections (per pocket):
Inlet connection ........ 1/2” N.P.T. (female)
Inlet supply size ........ 1/2” Pipe (minimum)
Btu/hr input ............... 106,000 (26,711 kcal/hr)
Natural Gas
Regulation is controlled by the dryer’s gas valve’s internal
regulator. Incoming supply pressure must be consistent
between a minimum of 6.0 in WC (14.92 mb) and a maximum
of 12.0 in WC (29.9 mb) pressure.
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.
If a separate feed is provided for each tumbler from the main
supply line (header), then a 1/2” (12.7 mm) line connection
is sufficient. However, if the top and bottom tumbler
connections are connected together, the supply from the
header must be increased to 3/4-inch (19.05 mm). It is
recommended that a gas shutoff valve be provided to the
gas supply line of each dryer for ease in servicing.
IMPORTANT: When plumbing upper and lower tumblers
together, as illustrated below, supply connection must be a
minimum of 3/4” (19.05 mm).
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.
Shaded area is stated in metric equivalent
* Per pocket.
** D.M.S. equivalents are as follows:
Natural Gas ................ #11 = 0.191” (4.851 mm).
L.P. Gas ...................... #31 = 0.120” (3.048 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 two 1/2” N.P.T. female pipe
connections located at the rear of the dryer (refer to
page 7 ).