American Dryer Corp. ML-170 - Manual (Page 21)

113360 - 8 www.amdry.com 21
2. Technical Data
a. Gas Specifications
Shaded areas are stated in metric equivalents
* Measured at the gas valve pressure tap when the gas valve is on.
b. Gas Connections:
Inlet connection --- 1-1/2” F.P.T.
Inlet supply size --- 1-1/2” Pipe Diameter (minimum)
Btu/hr input --------- 550,000 (138,598 kcal/hr)
1) 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 inches (29.9 mb) water
column (W.C.) pressure.
2) Liquid Propane (L.P.) Gas
The 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 inches (26.1 mb) water column. 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
* Drill Measurement Size (D.M.S.) equivalents are as follows:
Natural Gas ................ #2 = 0.2210” (5.6134 mm).
Liquid Propane Gas .... #29 = 0.1360” (3.4544 mm).
TYPE OF GAS
Liquid
Propane
Conversion Kit
Part Number
Btu/hr
Rating
kcal/hr
Rating
Natural Liquid Propane
Qty. D.M.S.* Part No. Qty. D.M.S.* Part No.
550,000 138,598 4 #2 140839 4 #29 140820 880978
TYPE OF GAS
NATURAL LIQUID PROPANE
Manifold Pressure* 3.5 inches W.C. 8.7 mb 10.5 inches W.C. 26.1 mb
In-Line Pressure 6.0 - 12.0 inches W.C. 14.92 - 29.9 mb 11.0 inches W.C. 27.4 mb