American Dryer Corp. MD-170 - Manual (Page 30)

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2. Technical Gas Data
a. Gas Specifications
b. Gas Connections:
Inlet connection ---- 1-inch N.P.T.
Inlet supply size ----- 1-inch N.P.T. (minimum)
Btu/hr input (per dryer) ----- 550,000 (138,600 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-inches (14.92 millibars) and a maximum of 12-inches water
column (29.9 millibars) 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 water column (26.1 millibars). 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.
T
YPE OF
G
AS
N
ATURAL
L
IQUID
P
ROPANE
Manifold Pressure* 3.5 inches W.C. 8.7 mb 10.5 inches W.C. 26.1 mb
Inline Pressure 6.0 - 12.0 inches W.C. 14.92 - 29.9 mb 10.5 inches W.C. 26.1 mb
Shaded areas are stated in metric equivalents
* Measured at outlet side of gas valve pressure tap when gas valve is on.
T
YP E OF
G
AS L.P.
Conversion
Kit
Part Number
ADC
MODEL
NUMBER
BTU
Per Hour
Rating
kcal/hr
Rating
Natural Liquid Propane
Qty. D.M.S.*
Part
Number
Qty. D.M.S.*
Part
Number
MDG-170 550,000 138,600 4 #2 140839 4 #29 140820 880978
Shaded area is stated in metric equivalent
* D.M.S. (Drill Material Size) equivalents are as follows:
Natural Gas ............... #2 = .2210" (5.6134 mm)
Liquid Propane Gas .. #29 = .1360" (3.4544 mm)