3 Gas and Electrical Specifications
Topics Covered in this Chapter
▪ The Fuel Supply
▪ Electrical Load Information
The Fuel Supply
You can choose either Liquid Propane (LP) or Natural Gas (NG) to fuel the heater(s) for your TopDry.
Liquid Propane
If using LP gas, make sure to slowly open the main fuel supply valve at the supply tank.
Table 3-1 Liquid Propane (LP) Fuel Recommendations
Dryer
Fan
Size
Dryer
Horse-
power
Maximum Heat
Capacity BTU
per Hour
Maximum
Fuel Flow
Gallons per
Hour
Minimum
Line Size
Orifice
Size
Minimum
Operating
Pressure
Maximum
Operating
Pressure
36 in. 15 4.5 Million 49 1/2 in. 21/64 in. 2 lb. 14 lbs.
40 in. 15 5.95 Million 63
1/2 in. 11/32 in.
2 lb. 18.5 lbs.
42 in. 30 8.75 Million 95
1/2 in. 7/16 in.
2 lb. 16 lbs.
42 in. 40 10.25 Million 112 3/4 in. 29/64 in. 2 lb. 19.5 lbs.
Natural Gas
If using natural gas, turn ON the valve along the supply line. Then open the ball valve on the fan heater
unit(s).
Table 3-2 Natural Gas (NG) Fuel Recommendations
Dryer
Fan
Size
Dryer
Horse-
power
Maximum Heat
Capacity BTU
per Hour
Maximum Fuel
Flow Cubic Ft.
per Hour
Minimum
Line Size
Orifice
Size
Minimum
Operating
Pressure
Maximum
Operating
Pressure
36 in. 15 4.5 Million 4500 2 in. 27/64 in. 1 lb. 12.5 lbs.
40 in. 15 5.75 Million 5750 2 in.
33/64 in.
1 lb. 9 lbs.
42 in. 30 8.75 Million 8750 2 in.
19/32 in.
1 lb. 12 lbs.
42 in. 40 10.25 Million 10,250 2 in. 23/32 in. 1 lb. 8 lbs.
Pneg–4900 TopDry Terminal™ 27
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