Table 10 - Natural Gas (Ft 3 /Hr) Maximum Piping Capacities; Table 11 - Propane (Kbtu/Hr) Maximum Piping Capacities; Table 12 - Gas Inlet Pressure; Table 13 - Manifold Pressure - AAON V3-A Installation, Operation & Maintenance Instructions Manual

Table 10 - Natural Gas (ft
Specific Gravity = 0.6, Supply Pressure ≤ 0.5 psi, Pressure Drop = 0.5"wc
Pipe Size
1/2"
3/4"
1"
1-1/4"
1-1/2"
2"
2-1/2"

Table 11 - Propane (kBtu/hr) Maximum Piping Capacities

Specific Gravity = 1.52, Supply Pressure = 11"wc., Pressure Drop, 0.5"wc
Pipe Size
1/2"
3/4"
1"
1-1/4"
1-1/2"
2"
After verifying gas inlet pressure and
manifold pressure the service technician must
time the gas flow rate through the gas meter
with a stopwatch to verify the gas input rate.

Table 12 - Gas Inlet Pressure

Gas Inlet
Pressures ("wc)
Minimum
Maximum
Unit nameplate input rate value has been
calculated at the altitude where the unit was
shipped. Above 2,000 ft the input rate is
adjusted 4% for every 1,000 ft.
A factory installed pressure tap on the outlet
end of the gas valve can be used to verify the
manifold pressure.
20 ft 50 ft.
120 73
250 151
465 285
950 580
1460 900
2750 1680
4350 2650
20 ft 50 ft.
189 114
393 237
732 448
1496 913
2299 1417
4331 2646
Natural Propane
Gas Gas (LP)
6.0"wc
11.0"wc
10.5"wc
13.0"wc
3
/hr) Maximum Piping Capacities
Length of Pipe
100 ft.
50
103
195
400
620
1150
1850
Length of Pipe
100 ft.
78
162
307
630
976
1811

Table 13 - Manifold Pressure

Unit Size (V3-)
A
B
C
Do not use gas piping smaller than unit gas
connections. Natural gas pipe runs longer
than 20 feet and propane gas pipe runs longer
than 50 feet may require a larger supply pipe
than the unit connection size. Some utility
companies may also require pipe sizes larger
than the minimum sizes listed.
150 ft. 200 ft.
40 35
84 72
160 135
325 280
500 430
950 800
1500 1280
150 ft. 200 ft.
63 55
132 112
252 213
511 440
787 675
1496 1260
Natural Propane
Gas Gas (LP)
10.5"wc
3.5"wc
10.0"wc