Field Controls 46401800 Instruction Sheet page 4

Combustion air system
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0.00
0.50
1.00
300
250
200
150
100
50
0
0
50
100
150
0.00
0.50
300
250
200
150
100
50
0
0
50
100
HIGH SPEED SIZING CHART
OIL INPUT FIRING RATE (gallons per hour)
(1 gallon oil/hr = 140,000 BTU/hr)
1.50
2.00
2.50
200
250
300
350
GAS INPUT FIRING RATE (1000 BTU/hr.)
LOW SPEED SIZING CHART
OIL INPUT FIRING RATE (gallons per hour)
(1 gallon oil/hr = 140,000 BTU/hr.)
1.00
1.50
150
200
250
GAS INPUT FIRING RATE (1000 BTU/hr.)
Page 4
3.00
3.50
6" Duct & Hood
4" Duct & Hood
4" Duct, Hood, & Orifice
400
450
500
Diagram A
2.00
2.50
6" Duct & Hood
4" Duct & Hood
4" Duct & Hood w/ Orifice
300
350
400
Diagram B
550

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