FloAire INDIRECT FIRED BENT TUBE MODULE - Manual (Page 33)

33
High Altitude Orifice Sizing
The burner orifices should be sized per the table below depending on fuel type, furnace size and altitude.
Standard orifice sizes are for sea level. The unit should either be ordered with the altitude specific orifices
or the parts should be ordered through CaptiveAire.
Natural Gas High ALT Conversion
High ALT for 400,000BTU High ATL for 300,000 to 75,000BTU
Altitude
Input
Rate
Drill
Size
Input
Rate
Input
Rate
Input
Rate
Drill
Size
0 - 1999ft 400000 #41 300,000 200,000 150,000 #3/32
2000-2999ft 384000 #42 288000 192000 144000 2.35mm
3000-3999ft 368640 2.35mm 276480 184320 138240 2.3mm
4000-4999ft 353894 2.3mm 265421 176947 132710 #43
5000-5999ft 339739 #43 254804 169869 127402 2.25mm
6000-6999ft 326149 2.25mm 244612 163075 122306 #44
7000-8000ft 313103 #44 234827 156552 117414 2.15mm
LP Gas High ALT Conversion
High ALT for 400,000BTU High ATL for 300,000 to 75,000BTU
Altitude
Input
Rate
Drill
Size
Input
Rate
Input
Rate
Input
Rate
Drill
Size
0 - 1999ft 400000 1.45mm 300,000 200,000 150,000 #54
2000-2999ft 384000 #54 288000 192000 144000 #54
3000-3999ft 368640 #54 276480 184320 138240 #55
4000-4999ft 353894 #54 265421 176947 132710 #55
5000-5999ft 339739 #54 254804 169869 127402 #55
6000-6999ft 326149 #55 244612 163075 122306 #55
7000-8000ft 313103 #55 234827 156552 117414 #56
Orifice Part Numbers Orifice Qty. Per Furnace
Size Part# AX# Size Qty
#41 BG100-41 A0023045 150,000 BTU 6
#42 BG100-42 A0023050 200,000 BTU 8
2.35mm BG101-19 A0023053 300,000 BTU 12
2.3mm BG101-05 A0023051 400,000 BTU 15
#43 BG100-43 A0023047
2.25mm BG101-20 A0023054
#44 BG100-44 A0023046
#3/32 BG100-3/32 A0023044
2.15mm BG101-21 A0023055
1.45mm BG101-16 A0023052
#54 BG100-54 A0023048
#55 BG100-55 A0023049
#56 BG100-56 A0023057