Bard WG Series Installation Instructions Manual

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Bard WG Series Installation Instructions Manual Manual pdf 30 page image

Manual 2100-587JPage 30 of 59All other orifice sizes shown are available as individual items. See orifice tables below for part numbers and number required.TABLE 8Natural Gas Orifice TablesFactory StandardInputGas Heat* ValueBTU/Cu. Ft.Up to 6,000' NoChanges Exceptfor BTU Content6,001' to 8,000'Requires Pressure SwitchChange and OrificeChange Based on BTUContent8,001' to 10,000'Requires Pressure SwitchChange and Orifice ChangeBased on BTU Content25000 BTUPer Burner700-749 2.90 2.80 2.70750-799 2.80 2.70 2.60800-849 2.70 2.60 2.50850-899 2.60 2.50 2.45900-949 2.50 2.45 (2.40)950-999 2.45 (2.40) 2.351000-1049** (2.40) 2.35 [2.30]1050-1100 [2.30] 2.25 2.20Pressure 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-installedoptional 10% derateOptional10% FieldConverted DerateGas Heat* ValueBTU/Cu. Ft.Up to 6,000' NoChanges Exceptfor BTU Content6,001' to 8,000'Requires Pressure SwitchChange and OrificeChange Based on BTUContent8,001' to 10,000'Requires Pressure SwitchChange and Orifice ChangeBased on BTU Content22500 BTUPer Burner700-749 2.75 2.70 2.60750-799 2.70 2.60 2.50800-849 2.60 2.50850-899 2.50 2.45 (2.40)900-949 (2.40) 2.35 [2.30]950-999 2.35 [2.30] 2.251000-1049** [2.30] 2.25 2.201050-1100 2.25 2.25 2.20Pressure Switch Standard (.55) Order 8620-189 High Altitude Pressure Switch Kit (.42)[2.30] orifices are shipped with the unit for field-installed optional10% input rate(2.40) is the factory-installed orifice size for full ratedinputAt 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 Diameter9010-092 2.10 0.08269010-088 2.15 0.08469010-087 2.20 0.08669010-086 2.25 0.08859010-082 2.30 0.09059010-085 2.35 0.09259010-079 2.40 0.09459010-084 2.45 0.09649010-093 2.50 0.09849010-094 2.60 0.10249010-095 2.70 0.10639010-096 2.75 0.10829010-097 2.80 0.11029010-098 2.90 0.1142No. of Orifices RequiredBased on Unit Input Rating45,000 (2)50,000 (2)68,000 (3)75,000 (3)90,000 (4)100,000 (4)113,000 (5)125,000 (5)