Burnham K2WT Residential Installation, Operating And Service Instructions page 160

Appendix A - (continued)
Table A2: K2WT Altitudes Derates for Natural Gas
Model No.
K2WT-080B
K2WT-100B
K2WT-120B
K2WT-150B
K2WT-180B
K2WT-180M
NOTE: THESE DERATES ARE AT MINIMUM VENT LENGTH Max. Vent Length 135 eq. Feet (3
inch Intake/Vent Pipe)
Table A3: Approximate Starting Number of Throttle Turns for Natural Gas
160
Approximate Derate per 1000 ft.
2001-6000 ft.
0.9%
1.9%
1.2%
2.6%
0.1%
Model
080
100
120
150
180
6001-7800 ft.
4.0%
2.6%
1.8%
2.9%
Not Permitted
1.9%
# Counter-clockwise Turns
(From Fully Closed)
9-3/4
9-3/4
12-1/4
10
15
7801-10,100 ft.
4.0%
2.7%
2.4%
3.1%
3.0%
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