Lennox SLP98DFV Installation Instructions Manual page 30

MANUAL
MAIN SHUT-OFF
VALVE
(1/8 in. NPT
plugged tap shown)
Nominal Internal
Iron Pipe Diameter
Size Inches inches
(mm) (mm)
1/2 .622
(12.7) (17.799)
3/4 .824
(19.05) (20.930)
1 1.049
(25.4) (26.645)
1-1/4 1.380
(31.75) (35.052)
1-1/2 1.610
(38.1) (40.894)
2 2.067
(50.8) (52.502)
2-1/2 2.469
(63.5) (67.713)
3 3.068
(76.2) (77.927)
NOTE - Capacity given in cubic feet (m3 ) of gas per hour and based on 0.60 specific gravity gas.
Removal of the Furnace from Common Vent
In the event that an existing furnace is removed from a
venting system commonly run with separate gas applianc-
es, the venting system is likely to be too large to properly
vent the remaining attached appliances.
Conduct the following test while each appliance is oper-
ating and the other appliances (which are not operating)
remain connected to the common venting system. If the
venting system has been installed improperly, you must
correct the system as indicated in the general venting re-
quirements section.
Left Side Piping
(Standard)
AUTOMATIC
GAS VALVE
(with manual
shut-off valve)
GROUND
JOINT
UNION
DRIP LEG
NOTE - BLACK IRON PIPE ONLY TO BE ROUTED INSIDE OF CABINET
Gas Pipe Capacity - ft3/hr (m3/hr)
10 20 30
(3.048) (6.096) (9,144)
172 118 95
(4.87) (3.34) (2.69)
360 247 199
(10.19) (7.000) (5.63)
678 466 374
(19.19) (13.19) (10.59)
1350 957 768
(38.22) (27.09) (22.25)
2090 1430 1150
(59.18) (40.49) (32.56)
4020 2760 2220
(113.83) (78.15) (62.86)
6400 4400 3530
(181.22) (124.59) (99.95)
11300 7780 6250
(319.98) (220.30) (176.98)
AUTOMATIC
GAS VALVE
(with manual
shut-off valve)
FIELD
PROVIDED
AND INSTALLED
FIGURE 42
TABLE 10
Length of Pipe - feet (m)
40 50 60
(12,192) (15.240) (18.288)
81 72 65
(2.29) (2.03) (1.84)
170 151 137
(4.81) (4.23) (3.87)
320 284 257
(9.06) (8.04) (7.27)
657 583 528
(18.60) (16.50) (14.95)
985 873 791
(27.89) (24.72) (22.39)
1900 1680 1520
(53.80) (47.57) (43.04)
3020 2680 2480
(85.51) (75.88) (70.22)
5350 4740 4290
(151.49) (134.22) (121.47)
Page 30
MANUAL
MAIN SHUT-OFF
VALVE
(1/8 in. NPT
plugged tap
shown)
GROUND
JOINT
UNION
DRIP LEG
Right Side Piping
(Alternate)
70 80 90
(21.336) (24.384) (27.432)
60 56 52
(1.69) (1.58) (1.47)
126 117 110
(3.56) (3.31) (3.11)
237 220 207
(6.71) (6.23) (5.86)
486 452 424
(13.76) (12.79) (12.00)
728 677 635
(20.61) (19.17) (17.98)
1400 1300 1220
(39.64) (36.81) (34.55)
2230 2080 1950
(63.14) (58.89) (55.22)
3950 3670 3450
(111.85) (103.92) (97.69)
100
(30,480)
50
(1.42)
104
(2.94)
195
(5.52)
400
(11.33)
600
(17.00)
1160
(32.844)
1840
(52.10)
3260
(92.31)