U.S. Boiler Company ASPEN ASPN-320, Installation, Operating And Service Instructions

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Appendix A - (continued)
Table A.1: Altitude Adjustments (Above 2,000 ft. only)
Model No. Fuel
Approximate Derate per 1,000 ft.
2,001-6,000 ft 6,001-7,800 ft 7,801-10,1000 ft
ASPN-320
NG
0.0%
0.3% 1.6%
LP 0.8%
2.1%
ASPN-399
NG
0.6%
1.5%
LP 1.3% 3.9%
De-rate’s per 1000 ft. are approximate
Based on minimum vent length
Table A.2: Acceptable Combustion Readings (Above 2000 ft. only)
Model No. Fuel
Measured CO
2
(%)* Max. CO Air Free
2,001-6,000 ft 6,001-7,800 ft 7,80,-10,100 ft
COAF readings must
be less than 200
ppm.
Range Target Range Target Range Target
ASPN-320
NG 9.1-9.4 9.4 9.3-9.6 9.6 9.1-9.4 9.4
ASPN-399 NG 9.3-9.6 9.6 9.2-9.5 9.5 9.0-9.3 9.3
* Low Fire Range and Target values are the same as High Fire above. Ensure low fire CO
2
reading is less than or equal to high fire CO
2
reading.
Model No. Fuel
Measured O
2
(%)** Max Co Air Free
2,001-6,000 ft 6,001-7,800 ft 7,801-10,100 ft
COAF readings
must be less than
200 ppm.
Range Target Range Target Range Target
ASPN-320 NG 4.9-4.4 4.4 4.5-4.0 4.0 4.9-4.4 4.4
ASPN-399 NG 4.5-4.0 4.0 4.7-4.2 4.2 5.1-4.6 4.5
** Low Fire Range and Target values are the same as High Fire above. Ensure low fire O
2
reading is greater than or equal to high fire O
2
reading.
Model Size
No. Counter-Clockwise Turns (From Fully Closed)
NG
320 5.5
399 7.0
Table A.3: Approximate Starting Number of Throttle Turns