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Table A2: K2WTC Altitudes Derates
Model No.
Fuel
NG
K2WTC-135B
NG
K2WTC-150B
NG
K2WTC-180B
NOTE: THESE DERATES ARE AT MINIMUM VENT LENGTH Max. Vent Length 135 eq. Feet (3 inch Intake/
Vent Pipe)
Model Size
107774-01- 9/17
Appendix A - (continued)
2001-6000 ft.
1.2%
LP
1.7%
2.6%
LP
3.2%
LP
Table A3: Approximate Starting Number of Throttle Turns
# Counter-clockwise Turns (From Fully Closed)
Natural Gas
135
150
180
Approximate Derate per 1000 ft.
6001-7800 ft.
1.8%
3.3%
2.9%
3.0%
Not Permitted
12-1/4
10
15
7801-10,100 ft.
2.4%
Not Permitted
3.1%
3.3%
LP Gas
9
10
14
155
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