Grain Systems PNEG-588-04 - Manual (Page 10)

4. Specifications
10 PNEG-588-04 Deluxe Downwind Heater Installation and Operation
Fuel Specifications and Recommendations
Model # CHD-15 CHD-30 CHD-40
BTU Rating 2,300,000 3,300,000 4,200,000
Liquid
Propane
Models (LP)
Orifice Size 7/32" 17/64" 5/16"
Operating Pressure Range, Heater Gauge Pressure (PSI) ** 1-15 1-15 1-15
Typical Maximum Fuel Flow (GPH) * 25 36 46
Minimum Liquid Line Size 1/2" 1/2" 1/2"
Propane
Vapor
Models (VN)
Orifice Size 7/32" 17/64" 5/16"
Operating Pressure Range, Heater Gauge Pressure (PSI) ** 1-15 1-15 1-15
Typical Maximum Fuel Flow (CFH) * 961 1379 1755
Minimum Line Size, 100' Run 1.0" 1.0" 1-1/4"
Minimum Pressure to Heater at Connection (PSI) 20 20 20
Natural Gas
Models (VN)
Orifice Size 21/64" 25/64" 7/16"
Operating Pressure Range, Heater Gauge Pressure (PSI) ** 1-7 1-7 1-7
Typical Maximum Vapor Fuel Flow (CFH) * 2212 3173 4038
Minimum Line Size, 100' Run 1.0" 1.0" 1-1/4"
Minimum Pressure to Heater at Connection (PSI) 10 10 10
* Maximum fuel flow rates listed assume full heat output for gas line sizing purposes. In normal operation, the fuel flow rates
would be substantially lower than indicated, due to actual pressure setting used and cycling of the burner.
** The gas pressures listed show the operating limits for each model heater and are not necessarily the recommended
operating pressure. The actual gas operating pressure should be within these limits, but will vary depending on the type
of grain and the drying system. The maximum setting assumes ideal conditions of relatively low static pressure conditions
with high fan airflow and good quality combustion. High static pressure conditions will require lower maximum gas pressure
setting than specified.