Trane FADA, Installation & Operation Manual, Page: 34 / 84

34 FAXA-SVX01B-EN
Installation
mechanical
requirements
Table I-MR-1. Gas pipe sizes, at 0.5 psig (3.5 Pa) or less, 0.5” w.c. (124.4 Pa), 0.60 specific gravity gas
maximum pipe capacity for gas pressures, ft.
3
/hr. (m
3
/h)
nominal internal pipe length, ft. (m)
iron pipe, diameter, 10 20 30 40 50 60 70 80 90 100 125 150 175 200
in. in. (mm) (3.0) (6.1) (9.1) (12.2) (15.2) (18.2) (21.3) (24.4) (27.4) (30.5) (38.1) (45.7) (53.3) (61.0)
1 /
2
0.622 175 120 97 82 73 66 61 57 53 50 44 40 37 35
(16) (4.96) (3.40) (2.75) (2.32) (2.07) (1.87) (1.73) (1.61) (1.50) (1.42) (1.25) (1.13) (1.05) (0.99)
3 /
4
0.824 360 250 200 170 151 138 125 118 110 103 93 84 77 72
(21) (10.2) (7.08) (5.66) (4.81) (4.28) (3.91) (3.54) (3.34) (3.11) (2.92) (2.63) (2.38) (2.18) (2.04)
1 1.049 680 465 375 320 285 260 240 220 205 195 175 160 145 135
(27) (19.3) (13.2) (10.6) (9.06) (8.07) (7.36) (6.80) (6.23) (5.80) (5.52) (4.96) (4.53) (4.11) (3.82)
1 1 /
4
1.380 1400 950 770 660 580 530 490 460 430 400 360 325 300 280
(35) (39.6) (26.9) (21.8) (18.7) (16.4) (15.0) (13.9) (13.0) (12.2) (11.3) (10.2) (9.20) (8.50) (7.93)
1 1 /
2
1.610 2100 1460 1180 990 900 810 750 690 650 620 550 500 460 430
(41) (59.5) (41.3) (33.4) (28.0) (25.5) (22.9) (21.2) (19.5) (18.4) (17.6) (15.6) (14.2) (13.0) (12.2)
2 2.067 3950 2750 2200 1900 1680 1520 1400 1300 1220 1150 1020 950 850 800
(53) (112) (77.9) (62.3) (53.8) (47.6) (43.0) (39.6) (36.8) (34.5) (32.6) (28.9) (26.9) (24.1) (22.7)
2 1 /
2
2.469 6300 4350 3520 3000 2650 2400 2250 2050 1950 1850 1650 1500 1370 1280
(63) (178) (123) (99.7) (85.0) (75.0) (68.0) (63.7) (58.0) (55.2) (52.4) (46.7) (42.5) (38.8) (36.2)
3 3.068 11000 7700 6250 5300 4750 4300 3900 3700 3450 3250 2950 2650 2450 2280
(78) (311) (218) (177) (150) (135) (122) (110) (105) (97.7) (92.0) (83.5) (75.0) (69.4) )(64.6)
4 4.026 2300 15800 12800 10900 9700 8800 8100 7500 7200 6700 6000 5500 5000 4600
(102) (651) (447) (362) (309) (275) (249) (229) (212) (204) (190) (170) (156) (142) (130)
Note: 1. ft. 3 /hr = input / 1000. For SI, convert Btu/hr to kW. m 3 /hr = input (kW) x (0.0965).
2. Size natural gas select pipe directly from the table.
5. Pipe directly in to the manual shutoff
valve.
6. Install a 1 /
8
" (3.2 mm) N.P.T. plugged
tapping, accessible for test gauge
connection, immediately upstream of
the gas supply connection to the
appliance.
7. Provide a drip leg in the gas piping near
the gas duct furnace.
8. Make certain that all connections have
been adequately doped and tightened.
9. Remove temporary shipping panels
and install the permanent panels that
ship in the return air section of the unit.
CAUTION
Valve stress hazard!
Do not overtighten the inlet gas piping
into the valve. This may cause stresses
that would crack the valve!
Note: Use pipe joint sealant resistant to
the action of liquefied petroleum gases
regardless of gas conducted.
WARNING
Explosion hazard!
Failure to follow recommended safe
leak test procedures can cause death
or serious injury.
Note: Check all pipe joints for leakage
using a soap solution or other approved
method. The appliance and its individual
shutoff valve must be disconnected from
the gas supply piping system during any
pressure testing of that system.