HP Hickory Rotisseries 45WDG PLUS - Manual (Page 8)

Hickory Industries, Inc.
4900 Westside Avenue, North Bergen, New Jersey 07047
Tel: [201] 223-0050 Fax: [201] 223-0950
N/45 Series Manual12/00
Page 8 of 38
1.7.1 Volumetric Method to Verify the High Flame Setting, Mathematical
WARNING! No other gas equipment can be in operation during this procedure.
Calculation of flow rate E in ft 3 /hour
E = FP
H
i
E = Flow rate in ft 3 /minute
FP = High Flame Power setting in BTU/hr
H
i
= Heating value in BTU/ft 3
Thus, for natural gas:
E = 60,000 BTU/hr = 57.75 ft 3 /hr = 0.96 ft 3 /min.
1040 BTU/ft 3
E = 0.96 ft 3 /min.
Calculation of the natural gas needed in 1 hour by a 45WDG (3 burners) at full power:
57.75 * 3 = 173.25 ft 3 /hr = 2.89 ft 3 /min.
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 on page 24 and set the manifold valves to the high flame setting ("on" position).
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.
in ft 3 /hr
Gas Flow
per Burner (40,000 BTU)
BTU/ft³
Heating Value in Gas
High Flame Setting
Natural
Propane
Butane
1040 57.75
1.7 Natural Gas Flow Table
2500
2500 24.00
24.00