Table 36 -11 - 70 Ton Gas Connections; Table 37 - Natural Gas (M 3 /Hr [Ft 3 /Hr]) Maximum Piping Capacities; Figure 52 - Rn Series Gas Heat Exchanger - AAON RN Series Installation Operation & Maintenance

Cabinet
Staging
Size
2, MOD
4, HITD
2, 4, MOD
RNC
HITD
2, 4 MOD
HITD
2,MOD
4, HITD
2, 4 MOD
RND
HITD
2, 4 MOD
HITD
Ater verifying gas inlet pressure and
manifold pressure the service technician shall
time the gas flow rate through the gas meter
with a stopwatch to verify the gas input rate.
Unit nameplate input rate value has been
calculated at the altitude where the unit was
shipped. Above 609.6 m (2,000 ft)., the input
rate is adjusted 4% for every 304.8 m
(1,000 ft).
Table 37 - Natural Gas (m
Pipe Size
(mm [in.])
12.7 (1/2)
19 (3/4)
25.4 (1)
31.75 (1-1/4)
38.1 (1-1/2)
50.8 (2)
63.5 (2-1/2)
104
Table 36 -11 – 70 ton Gas Connections
Gas
Capacity
Valve
(MBH)
QTY
270
405
540
600
900
1200
MOD = Modulating, HITD = High Turndown
Specific Gravity = 0.6, Supply Pressure ≤ 3.5 kpa (0.5 psi),
Pressure Drop = .93 mmHg (0.5" w.c).
6.1 (20) 15.2 (50)
3.4 (120) 2 (73)
7 (250) 4.2 (151)
13 (465) 8 (285)
26.6 (950) 16.2 (580)
40.9 (1460) 25.2 (900)
77 (2750) 47 (1680)
121.8 (4350) 74.2 (2650)
Valve 1 Valve 2
Size Size
1 3/4" -
2 1/2" 3/4"
2 3/4" 3/4"
3 1/2" 3/4"
2 3/4" 3/4"
3 1/2" 3/4"
2 3/4" 3/4"
4 1/2" 3/4"
3 3/4" 3/4"
5 1/2" 3/4"
4 3/4" 3/4"
6 1/2" 3/4"

Figure 52 - RN Series Gas Heat Exchanger

3 3
/hr [ft /hr]) Maximum Piping Capacities
Length of Pipe (m [ft])
30.4 (100).
1.4 (50)
2.9 (103)
5.5 (195)
11.2 (400)
17.4 (620)
32.2 (1150)
51.8 (1850)
Valve 3 Valve 4 Valve 5
Size Size Size
- -
- -
- -
3/4" -
- -
3/4" -
- -
1/2" 3/4"
3/4" -
1/2" 3/4"
3/4" 3/4"
1/2" 3/4"
45.6 (150) 60.8 (200)
1.1 (40)
2.4 (84)
4.5 (160) 3.8 (135)
9.1 (325) 7.8 (280)
14 (500)
26.6 (950) 22.4 (800)
42 (1500) 35.8 (1280)
Valve 6
Size
- -
- -
- -
- -
- -
- -
- -
- -
- -
3/4" -
- -
3/4" 3/4"
1 (35)
2 (72)
12 (430)