44
SHUTDOWN
44
APPENDIX
APPENDIX E - DE-RATING FOR ALTITUDE INSTALLATION
When the appliance is installed at an altitude higher than 2000 ft, the fan speed must be set to the maximum of the available range in
any case and a de-rating of the input capacity must be considered in function of the altitude combined with the total length of the vent
and combustion air pipe as reported in the following table (input BTU/hr)
ARRAY AR 3000
Altitude (ft)
From 0% to 25%
From 25% to 50%
From 50% to 75%
From 75% to 100%
0-2,000
3,000,000
3,000,000
3,000,000
3,000,000
3,000
2,753,689
2,705,900
2,658,105
2,610,316
4,000
2,662,349
2,616,142
2,569,935
2,523,728
5,000
2,571,013
2,526,394
2,481,769
2,437,150
6,000
2,479,672
2,436,636
2,393,598
2,350,561
7,000
2,388,337
2,346,888
2,305,433
2,263,984
8,000
2,296,996
2,257,129
2,217,262
2,177,401
9,000
2,205,661
2,167,382
2,129,102
2,090,817
10,000
2,114,320
2,077,623
2,040,931
2,004,234
ARRAY AR 4000
Altitude (ft)
From 0% to 25%
From 25% to 50%
From 50% to 75%
From 75% to 100%
0-2,000
4,000,000
4,000,000
4,000,000
4,000,000
3,000
3,671,586
3,607,867
3,544,141
3,480,422
4,000
3,549,798
3,488,189
3,426,579
3,364,970
5,000
3,428,018
3,368,526
3,309,026
3,249,533
6,000
3,306,230
3,248,847
3,191,464
3,134,082
7,000
3,184,450
3,129,184
3,073,911
3,018,645
8,000
3,062,662
3,009,506
2,956,349
2,903,201
9,000
2,940,881
2,889,842
2,838,803
2,787,757
10,000
2,819,094
2,770,164
2,721,242
2,672,312
To calculate the de-rating of the input capacity, follow this example:
We have an
ARRAY
AR 4000
boiler installed at 5,400 ft with a 10” flue system. The equivalent length of the vent pipe installed is 55 ft.
The equivalent length of the air combustion pipe installed is 35 ft.
The total equivalent length of the flue system is 55+35 = 90 ft. The maximum equivalent length for this type of installation is (see page
27) 100 ft.
The % range is 90/100 = 90%. This value is within the 75% and 100%.
Now the correct de-rating value is given from the value of the fourth column (From 75% to 100%) that crosses the row with 6,000 ft =
3,134,082 BTU/hr.
Summary of Contents for Array AR 3000
Page 1: ...cod Doc 0079789 rev 5 09 2018 Array AR 3000 AR 4000 US INSTALLATION AND OPERATION MANUAL...
Page 39: ...39 SHUTDOWN 39 APPENDIX WIRING DIAGRAM DEPENDENT 5 6 7 8 RIGHT DOOR...
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