Type of gas – American Dryer Corp. ML-78 User Manual

Page 31

2. Technical Gas Data

a. Gas Specifications

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) - 204,000

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

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.

Type of Gas

L.P.

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

MLG-78

204,000

#29

140820

#47

140805

881655

* D.M.S. (Drill Material Size) equivalents are as follows:

Natural Gas ................

#29 = .1360"

Liquid Propane Gas ...

#47 = .0785"