Table 28: 2-6 Ton Gas Connections; Table 29 - (Metric) Natural Gas Maximum Piping Capacities (M 3 /Hr); Table 30 - (Imperial) Natural Gas Maximum Piping Capacities (Ft 3 /Hr); Figure 33 - Rq Series Gas Heat Exchanger - AAON RQ NextGen Series Installation Operation & Maintenance

Table 28: 2-6 ton Gas Connections

Cabinet
Staging
Size
1, 2, MOD
4, HITD
1, 2, MOD
4, HITD
RQ
1, 2, MOD
4, HITD
1, 2, MOD
4, HITD
MOD = Modulating, HITD = High Turndown
After verifying gas inlet pressure and
manifold pressure the service technician shall
Table 29 – (Metric) Natural Gas Maximum Piping Capacities (m
- Specific Gravity = 0.6, Supply Pressure ≤ 3.5 kpa, Pressure Drop = 0.93 mmHg
Pipe Size
(mm)
12.7
19
25.4
31.75
38.10
50.80
63.50
Table 30 – (Imperial) Natural Gas Maximum Piping Capacities (ft
- Specific Gravity = 0.6, Supply Pressure ≤ 0.5 psi, Pressure Drop = 0.5" w.c.
Pipe Size
1/2"
3/4"
1"
1-1/4"
1-1/2"
2"
2-1/2"
82
Gas
Capacity Valve
Valve
1 Size
(MBH)
QTY
1
60
2
1
100
2
1
140
2
1
160
2
1/2" = 12.7 mm
6.1 m 15.2 m
3.4 2
7 4.2
13 8
26.9 16.4
41.3 25.5
77.9 47.6
123.2 75.0
20 ft 50 ft.
120 73
250 151
465 285
950 580
1460 900
2750 1680
4350 2650
time the gas flow rate through the
gas meter with a stopwatch to verify
the gas input rate.
Valve
Unit nameplate input rate value has
2 Size
been calculated at the altitude where
1/2" -
the unit was shipped. Above
1/2" 1/2"
609.6 m (2,000 ft) the input rate is
adjusted 4% for every 304.8 m
1/2" -
(1,000 ft).
1/2" 1/2"
1/2" -
1/2" 1/2"
1/2" -
1/2" 1/2"
Length of Pipe
30.4 m
1.4
2.9
5.5
11.3
17.6
32.6
52.4
Length of Pipe
100 ft.
50
103
195
400
620
1150
1850
Figure 34 - RQ Series Gas Heat
Exchanger
3
/hr)
45.6 m
1.1
2.4
4.5
9.2
14.2
26.9
42.5
3 /hr)
150 ft.
40
84
160
325
500
950
1500
60.8 m
1
2
3.8
7.9
12.2
22.7
36.2
200 ft.
35
72
135
280
430
800
1280