Electrical - Lennox EL296UHE Installation Instructions Manual

Nominal
Internal
Iron Pipe
Diameter
Size
inches
inches
(mm)
(3.048)
(mm)
1/2 .622
(12.7) (17.799) (4.87)
3/4 .824
(19.05) (20.930) (10.19)
1 1.049
(25.4) (26.645) (19.19)
1-1/4 1.380 1350
(31.75) (35.052) (38.22)
1-1/2 1.610 2090
(38.1) (40.894) (59.18)
2 2.067 4020
(50.8) (52.502) (113.83)
2-1/2 2.469 6400
(63.5) (67.713) (181.22)
3 3.068 11300
(76.2) (77.927) (319.98)
NOTE - Capacity given in cubic feet of gas per hour (kilo liters of gas per hour) and based on 0.60 specific gravity gas.

Electrical

ELECTROSTATIC DISCHARGE (ESD)
Precautions and Procedures
CAUTION
Electrostatic discharge can affect elec­
tronic components. Take precautions
to neutralize electrostatic charge by
touching your hand and tools to metal
prior to handling the control.
INTERIOR MAKE-UP BOX INSTALLATION
MAKE-UP
BOX
FIGURE 63
GAS PIPE CAPACITY - FT
10 20 30
(6.096) (9.144)
172 118 95
(3.34) (2.69)
360 247 199
(7.00) (5.63)
678 466 374
(13.19) (10.59)
957 768
(27.09) (22.25)
1430 1150
(40.49) (32.56)
2760 2220
(78.15) (62.86)
4400 3530
(124.59) (99.95)
7780 6250
(220.30) (176.98)
remove and relocate
plug to unused
opening on left side
Right Side
TABLE 10
3 /HR (kL/HR)
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) (4.28) (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)
The unit is equipped with a field make-up box. The make-
up box may be moved to the right side of the furnace to fa­
cilitate installation. Secure the excess wire to the existing
harness to protect it from damage.
Refer to figure 64 for field wiring, schematic wiring diagram
and troubleshooting.
The power supply wiring must meet Class I restrictions.
Protected by either a fuse or circuit breaker, select circuit
protection and wire size according to unit nameplate.
NOTE - Unit nameplate states maximum current draw.
Maximum Over-Current Protection allowed is 15 AMP.
Holes are on both sides of the furnace cabinet to facilitate
wiring.
Install a separate (properly sized) disconnect switch near
the furnace so that power can be turned off for servicing.
Before connecting the thermostat check to make sure the
wires will be long enough for servicing at a later date. Make
sure that thermostat wire is long enough to facilitate future
removal of blower for service.
Complete the wiring connections to the equipment. Use the
provided unit wiring diagram and the field wiring diagram
shown in figure 64. Use 18-gauge wire or larger that is suit­
able for Class II rating for thermostat connections.
Electrically ground the unit according to local codes or, in
the absence of local codes, according to the current Na­
tional Electric Code (ANSI/NFPA No. 70) for the USA and
current Canadian Electric Code part 1 (CSA standard
C22.1) for Canada. A green ground wire is provided in the
field make-up box.
NOTE - The EL296UHE furnace contains electronic
components that are polarity sensitive. Make sure that the
furnace is wired correctly and is properly grounded.
Page 40
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)