Hickory N/5.5 G Installation Manual - Page 7

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1.7
Natural Gas Flow Table
Gas
Natural
Propane
Butane

1.7.1 Volumetric Method to Verify the Flame Setting, Mathematical

WARNING! No other gas equipment can be in operation during this procedure.
Calculation of flow rate V in ft
V =
V = Flow rate in ft
FP = High Flame Power setting in BTU/hr
H
=
i
Thus, for natural gas:
V = 20,000
1040
3
V = 0.32 ft
/min.
This is the natural gas needed in 1 hour by a N/5.5 G (1 burner) at full power.
The time and the flow measurements should be taken at the gas (flow) meter with a
chronometer (stop watch).
To run the test, open the manual gas cock valve, start up the unit according to the start-up
instructions.
Allow the unit to pre-heat (burn) for 10 to 15 minutes. Verify that the flow rate is calibrated
to the appropriate flow rate indicated in the table.
Heating Value in
BTU/ft³
1040
2480
3215
3
/hour
FP
H
i
3
/minute
Heating value in BTU/ft
BTU/hr
=
3
BTU/ft
4900 Westside Avenue, North Bergen, New Jersey 07047
Tel: [201] 223-0050 Fax: [201] 223-0950
Gas Flow - in ft
20,000 BTU - Natural
17,000 BTU - LPG
High Flame Setting
19.23
6.85
5.28
3
3
19.23 ft
/hr
=
Hickory Industries, Inc.
3
/hr
3
0.32 ft
/min.
N/5.5 Installation 8/5/97
Page 7 of 18