American Dryer Corp. AD-60 - Manual (Page 30)

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2. Technical Gas Data
a. Gas Specifications
* Measured at outlet side of gas valve pressure tap when gas valve is on.
b. Gas Connections
Inlet connection ------------------1/2” N.P.T.
Inlet supply size ------------------1/2” N.P.T. (minimum)
Btu/hr input (per dryer) ---------160,000 (40,320 kcal/hr) ADG-60D
140,000 (35,280 kcal/hr) ADG-60DH
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
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.
* Drill Material Size (D.M.S.) equivalents are as follows:
Natural Gas .................. #23 = 0.1540” (3.9116 mm).
#29 = 0.1360” (3.4544 mm).
Liquid Propane Gas ..... #42 = 0.0935” (2.3749 mm).
#48 = 0.0760” (1.9304 mm).
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
Shaded areas are stated in metric equivalents
TYPE OF GAS
L.P.
Conversion
Kit
Part Number
ADC
MODEL
NUMBERS
BTU
Per Hour
Rating
kcal/hr
Rating
Natural Liquid Propane
Qty. D.M.S.*
Part
Number
Qty. D.M.S.*
Part
Number
AD-60D 160,000 40,320 3 #29 140820 3 #48 140804 881048
AD-60DH 140,000 35,280 2 #23 140856 2 #42 140810 881049
Shaded areas are stated in metric equivalents