AAON RQ NextGen Series, Установка, эксплуатация и обслуживание

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Table 28: 2-6 ton Gas Connections
After 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).
Figure 34 - RQ Series Gas Heat
Exchanger
Table 29 – ( Metric ) Natural Gas Maximum Piping Capacities (m 3 /hr)
- Specific Gravity = 0.6, Supply Pressure ≤ 3.5 kpa, Pressure Drop = 0.93 mmHg
Pipe Size
(mm)
Length of Pipe
6.1 m 15.2 m 30.4 m 45.6 m 60.8 m
12.7 3.4 2 1.4 1.1 1
19 7 4.2 2.9 2.4 2
25.4 13 8 5.5 4.5 3.8
31.75 26.9 16.4 11.3 9.2 7.9
38.10 41.3 25.5 17.6 14.2 12.2
50.80 77.9 47.6 32.6 26.9 22.7
63.50 123.2 75.0 52.4 42.5 36.2
Table 30 – ( Imperial ) Natural Gas Maximum Piping Capacities (ft
3
/hr)
- Specific Gravity = 0.6, Supply Pressure ≤ 0.5 psi, Pressure Drop = 0.5” w.c.
Pipe Size
Length of Pipe
20 ft 50 ft. 100 ft. 150 ft. 200 ft.
1/2” 120 73 50 40 35
3/4” 250 151 103 84 72
1” 465 285 195 160 135
1-1/4” 950 580 400 325 280
1-1/2” 1460 900 620 500 430
2” 2750 1680 1150 950 800
2-1/2” 4350 2650 1850 1500 1280
Cabinet
Size
Staging
Capacity
(MBH)
Gas
Valve
QTY
Valve
1 Size
Valve
2 Size
RQ
1, 2, MOD
60
1 1/2” -
4, HITD 2 1/2” 1/2”
1, 2, MOD
100
1 1/2” -
4, HITD 2 1/2” 1/2”
1, 2, MOD
140
1 1/2” -
4, HITD 2 1/2” 1/2”
1, 2, MOD
160
1 1/2” -
4, HITD
2
1/2” 1/2”
MOD = Modulating, HITD = High Turndown
1/2” = 12.7 mm