American Dryer Corp. Phase 7 / OPL ensor Activated Fire Extinguishing System D120 - Manual (Page 13)

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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
TYPE OF GAS
Btu/hr
Rating
kcal/hr
Rating
Natural Liquid Propane
Qty. D.M.S.* Part No. Qty. D.M.S.* Part No.
375,000 94,498 3 #4 140832 3 #31 140818
Liquid Propane Conversion Kit Part Number 883118
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The dryer and its individual shutoff valves must be
disconnected from the gas supply piping system during any
pressure testing of that system at test pressures in excess of
1/2 psig (3.5 kPa). The dryer must be isolated from the gas
supply piping system by closing its individual manual shutoff
valve during any pressure test of the gas supply system at
test pressures equal to or less than 1/2 psig (3.5 kPa).
Important
Failure to isolate or disconnect dryer from supply
as noted can cause irreparable damage to the
gas valve, which will void the warranty.
Warning
Fire or explosion could result.
Gas Supply
The gas dryer installation must meet the American National
Standard … National Fuel Gas Code ANSI Z223.1-LATEST
EDITION, or in Canada, the Canadian Installation Codes
CAN/CGA-B149.1 M91 (Natural Gas) or CAN/CGA-B149.2-
M91 (L.P. Gas) or LATEST EDITION, as well as local codes
and ordinances and must be done by a qualified professional.
Note
Undersized gas piping will result in ignition
problems, slow drying, increased use of energy,
and can create a safety hazard.
The dryer must be connected to the type of heat/gas
indicated on the dryer data label. If this information does
not agree with the type of gas available, do not operate the
dryer. Contact the distributor who sold the dryer or contact
the factory.
Important
Any burner changes or conversions must be
made by a qualified professional.
The input ratings shown on the dryer data label are for
elevations up to 2,000 feet (609.6 meters), unless elevation
requirements of over 2,000 feet (609.6 meters) were
specified at the time the dryer order was placed with the
factory. The adjustment or conversion of dryers in the field
for elevations over 2,000 feet (609.6 meters) is made by
changing each burner orifice. If this conversion is necessary,
contact the distributor who sold the dryer or contact the
factory.
Important
This gas dryer is not provided with an internal
gas supply shutoff and an external gas supply
shutoff must be provided.
Technical Data
Gas Specifications
Shaded areas are stated in metric equivalents
* Measured at the gas valve pressure tap when the gas valve is on.
Gas Connections
Inlet connection ........................ 1” F.B.S.P.T.
Inlet supply size ........................ 1-1/4” N.P.T. (minimum)
Btu/hr input ............................... 375,000 (94,498 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 inches (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.
Shaded area is stated in metric equivalent
* D.M.S. equivalents are as follows:
Natural Gas ..................... #4 = 0.2090” (5.3086 mm).
L.P. Gas .......................... #31 = 0.1200” (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 a 1” F.B.S.P.T. inlet pipe
connection extending out the back area of the burner box.
The minimum pipe size (supply line) to the dryer is 1-1/4”
N.P.T. For ease in servicing, the gas supply line of each
dryer must have its own shutoff valve.
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.