ADC AD-78 - Manual (Page 31)

2. Technical Gas Data
a. Gas Specifications
Type of Gas
Natural Gas Liquid Propane Gas
Manifold Pressure* 3.5 - 4.0 inches W.C. 10.5 -11.0 inches W.C.
Inline Pressure 6.0-12.0 inches W.C. 11.0 inches W.C.
* Measured at the gas valve pressure tap when the gas valve is on.
b. Gas Connections:
Inlet connection-----------3/4-inch N.P.T.
Inlet supply size----------- 3/4-inch N.P.T. (minimum)
Btu/hr input (per dryer) - 200,000
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 and a maximum of 12.0 inches 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 11.0 inches water column (W.C.). 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
LR
Conversion
Kit
Part Number
MODEL
NUMBER
BTU
Per Hour
Rating
Natural Liquid Propane
Qty. D.M.S.*
Part
Number
Qty-
D.M.S.*
Part
Number
ADG-78 200,000 4 #29 140820 4 #47 140805 881655
* D.M.S. (Drill Material Size) equivalents are as follows:
Natural Gas.................... #29 = .1360"
Liquid Propane Gas ... #47 = .0785"
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