Table 4 Table - Bard W24G4 Installation Instructions Manual

Natural Gas Orifice Tables for Models W42G, W48G and W60G
Factory Standard Gas Heat* Value
Input BTU/Cu. Ft.
700-749
750-799
800-849
850-899
25000 BTU
900-949
Per Burner
950-999
1000-1049**
1050-1100
Pressure Switch
(2.40) is the standard factory-installed orifice size
Optional
Gas Heat* Value
10% Field
BTU/Cu. Ft.
Converted Derate
700-749
750-799
800-849
850-899
22250 BTU
900-949
Per Burner
950-999
1000-1049**
1050-1100
Pressure Switch
[2.30] orifices are shipped with the unit for field-installed optional
10% input rate
* At standard conditions: 30.00 inches Mercury, 60F, saturated, .60 specific gravity.
** All Natural Gas factory orifice sizing and standard input ratings based on nominal 1025 BTU/cu. ft. gas and sea level conditions
All other orifice sizes shown are available as individual items. See orifice tables on page 32 for part numbers and number required.
TABLE 11B
6,001' to 8,000'
Up to 6,000' No Requires Pressure Switch
Changes Except Change and Orifice
for BTU Content
Change Based on BTU
2.90
2.80
2.70
2.60
2.50
2.45
(2.40)
[2.30]
Standard (.55) Order 8620-189 High Altitude Pressure Switch Kit (.42)
[2.30] orifices are shipped with the unit for field-installed
optional 10% derate
6,001' to 8,000'
Up to 6,000' No Requires Pressure Switch
Changes Except Change and Orifice
for BTU Content Change Based on BTU
2.75
2.70
2.60
2.50
(2.40)
2.35
[2.30]
2.25
Standard (.55) Order 8620-189 High Altitude Pressure Switch Kit (.42)
(2.40) is the factory-installed orifice size for full rated
input
8,001' to 10,000'
Requires Pressure Switch
Change and Orifice Change
Based on BTU Content
Content
2.80
2.70
2.60
2.50
2.45
(2.40)
2.35
2.25
8,001' to 10,000'
Requires Pressure Switch
Change and Orifice Change
Based on BTU Content
Content
2.70
2.60
2.50
2.45
2.35
[2.30]
2.25
2.25
2.70
2.60
2.50
2.45
(2.40)
2.35
[2.30]
2.20
2.60
2.50
(2.40)
[2.30]
2.25
2.20
2.20
Manual 2100-721B
Page 33 of 54