Trane Voyager RT-SVX17C-EN, Установка, эксплуатация и обслуживание

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Table 5
Sizing Natural Gas Pipe Mains & Branches
Gas Input (Cubic Feet/Hour)* Notes:
1. If more than one unit is served by
Gas Supply 1-1/4" 1-1/2" 2" 2-1/2" 3" 4" the same main gas supply, consider
Pipe Run (ft) Pipe Pipe Pipe Pipe Pipe Pipe the total gas input (cubic feet/hr.)
and the total length when determining
10 1050 1600 3050 4800 8500 17500 the appropriate gas pipe size.
20 730 1100 2100 3300 5900 12000 2. Obtain the Specific Gravity and
30 590 890 1650 2700 4700 9700 BTU/Cu.Ft. from the gas company.
40 500 760 1450 2300 4100 8300 3. The following example demonstrates
50 440 670 1270 2000 3600 7400 the considerations necessary when
60 400 610 1150 1850 3250 6800 determining the actual pipe size.
70 370 560 1050 1700 3000 6200
80 350 530 990 1600 2800 5800 Example: A 40' pipe run is needed to
90 320 490 930 1500 2600 5400 connect a unit with a 500 MBH furnace to a
100 305 460 870 1400 2500 5100 natural gas supply having a rating of 1,000
125 275 410 780 1250 2200 4500 BTU/Cu.Ft. and a specific gravity of 0.60
150 250 380 710 1130 2000 4100
175 225 350 650 1050 1850 3800
Cu.Ft/Hour = Furnace MBH Input
200 210 320 610 980 1700 3500 Gas BTU/Cu.Ft. X Multiplier (Table 5-1)
Cu.Ft/Hour = 500
* Table is based on a specific gravity of 0.60. Use Table 5-1 for the Table 5 indicates that a 1-1/4" pipe is required.
specific gravity of the local gas supply.
Table 5-1
Specific Gravity Multipliers
Specific
Gravity Multiplier
0.5 1.1
0.55 1.04
0.6 1
0.65 0.96
Figure 7
Gas Train Configuration for Low Heat units (High Heat Units utilize two Gas Trains.)