Trane RT-SVX10C-EN specifications Table, and 350 MBH, and 850 MBH, Installation Continued, Figure

							Installation (Continued)
Table 3-4
Sizing Natural Gas Pipe Mains & Branches
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.)
10	1050	1600	3050	4800	8500	17500	and the total length when determining
20	730	1100	2100	3300	5900	12000	the appropriate gas pipe size.
30	590	890	1650	2700	4700	9700	2. Obtain the Specific Gravity and
40	500	760	1450	2300	4100	8300	BTU/Cu.Ft. from the gas company.
50	440	670	1270	2000	3600	7400	3. The following example demonstrates
60	400	610	1150	1850	3250	6800	the considerations necessary when
70	370	560	1050	1700	3000	6200	determining the actual pipe size.
80	350	530	990	1600	2800	5800
90	320	490	930	1500	2600	5400	Example: A 40' pipe run is needed to
100	305	460	870	1400	2500	5100	connect a unit with a 500 MBH furnace to a
125	275	410	780	1250	2200	4500	natural gas supply having a rating of 1,000
150	250	380	710	1130	2000	4100	BTU/Cu.Ft. and a specific gravity of 0.60
175	225	350	650	1050	1850	3800
200	210	320	610	980	1700	3500	Cu.Ft/Hour = Furnace MBH Input

* Table is based on a specific gravity of 0.60. Use Table 3-1 for					Gas BTU/Cu.Ft. X Multiplier (Table 3-1)
specific gravity of the local gas supply.						Cu.Ft/Hour = 500
				Table 3 indicates that a 1-1/4" pipe					is required.
Specific Gravity Multipliers
Specific		Gas Heating Capacity Altitude Correction Factors
Gravity	Multiplier					Altitude (Ft.)
0.50	1.10		Sea Level	2001	2501		3501	4501	5501	6501
0.55	1.04		To 2000	To 2500		To 3500	To 4500	To 5500	To 6500	To 7500
0.60	1.00	Capacity
0.65	0.96	Multiplier	1.00	.92	.88		.84	.80	.76	.72
		Note: Correction factors are per AGA Std. 221.30 - 1964, Part VI, 6.12.
		Local codes may supersede.

Figure 3-10

Unit Gas Trains (Natural Gas)

235 and 350 MBH 500 and 850 MBH

33