Manual 2100-587J
Page
30 of 59
All other orifice sizes shown are available as individual items. See orifice tables below for part numbers and number required.
TABLE 8
Natural Gas Orifice Tables
Factory Standard
Input
Gas Heat* Value
BTU/Cu. Ft.
Up to 6,000
'
No
Changes Except
for BTU Content
6,001
'
to 8,000
'
Requires Pressure Switch
Change and Orifice
Change Based on BTU
Content
8,001
'
to 10,000
'
Requires Pressure Switch
Change and Orifice Change
Based on BTU Content
25000 BTU
Per Burner
700-749
2.90
2.80
2.70
750-799
2.80
2.70
2.60
800-849
2.70
2.60
2.50
850-899
2.60
2.50
2.45
900-949
2.50
2.45
(2.40)
950-999
2.45
(2.40)
2.35
1000-1049**
(2.40)
2.35
[2.30]
1050-1100
[2.30]
2.25
2.20
Pressure Switch
Standard (.55)
Order 8620-189 High Altitude Pressure Switch Kit (.42)
(2.40) is the standard factory-installed orifice size
[2.30] orifices are shipped with the unit for field-installed
optional 10% derate
Optional
10% Field
Converted Derate
Gas Heat* Value
BTU/Cu. Ft.
Up to 6,000
'
No
Changes Except
for BTU Content
6,001
'
to 8,000
'
Requires Pressure Switch
Change and Orifice
Change Based on BTU
Content
8,001
'
to 10,000
'
Requires Pressure Switch
Change and Orifice Change
Based on BTU Content
22500 BTU
Per Burner
700-749
2.75
2.70
2.60
750-799
2.70
2.60
2.50
800-849
2.60
2.50
850-899
2.50
2.45
(2.40)
900-949
(2.40)
2.35
[2.30]
950-999
2.35
[2.30]
2.25
1000-1049**
[2.30]
2.25
2.20
1050-1100
2.25
2.25
2.20
Pressure Switch
Standard (.55)
Order 8620-189 High Altitude Pressure Switch Kit (.42)
[2.30] orifices are shipped with the unit for field-installed optional
10% input rate
(2.40) is the factory-installed orifice size for full rated
input
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
*
**
Bard Part No.
Orifice Size (mm)
Orifice Diameter
9010-092
2.10
0.0826
9010-088
2.15
0.0846
9010-087
2.20
0.0866
9010-086
2.25
0.0885
9010-082
2.30
0.0905
9010-085
2.35
0.0925
9010-079
2.40
0.0945
9010-084
2.45
0.0964
9010-093
2.50
0.0984
9010-094
2.60
0.1024
9010-095
2.70
0.1063
9010-096
2.75
0.1082
9010-097
2.80
0.1102
9010-098
2.90
0.1142
No. of Orifices Required
Based on Unit Input Rating
45,000 (2)
50,000 (2)
68,000 (3)
75,000 (3)
90,000 (4)
100,000 (4)
113,000 (5)
125,000 (5)
Summary of Contents for WG Series
Page 11: ...Manual 2100 587J Page 11 of 59 FIGURE 2A Mounting Instructions for WG3S2...
Page 12: ...Manual 2100 587J Page 12 of 59 FIGURE 2B Mounting Instructions for WG4S2 and WG5S2...
Page 15: ...Manual 2100 587J Page 15 of 59 FIGURE 6 Common Wall Mounting Installations...
Page 25: ...Manual 2100 587J Page 25 of 59 FIGURE 11 Gas Pipe Connection...
