Lennox DAVE SIGNATURE SL280DFV Installation Instructions Manual page 19

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.
MANUAL
MAIN SHUT-OFF
VALVE
GROUND
JOINT
UNION
DRIP LEG
Leak Check
After gas piping is completed, carefully check all field-in-
stalled piping connections for gas leaks. Use a commer-
cially available leak detecting solution specifically manu-
factured for leak detection. Never use an open flame to
test for gas leaks.
NOTE - If emergency shutoff is necessary, shut off the
main manual gas valve and disconnect the main power
to the furnace. The installer should properly label these
devices.
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)
Left Side Piping
(Standard)
AUTOMATIC
GAS VALVE
(with manual
shut-off valve)
NOTE - BLACK IRON PIPE ONLY TO BE ROUTED INSIDE OF CABINET
TABLE 8
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)
AUTOMATIC
GAS VALVE
(with manual
shut-off valve)
FIELD
PROVIDED
AND INSTALLED
FIGURE 17
Some soaps used for leak detection are corrosive to
certain metals. Carefully rinse piping thoroughly after
leak test has been completed. Do not use matches,
candles, flame or other sources of ignition to check for
gas leaks.
Page 19
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)
MANUAL
MAIN SHUT-OFF
VALVE
GROUND
JOINT
UNION
DRIP LEG
Right Side Piping
(Alternate)
CAUTION
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)