Electrical - Lennox EL296UHV Installation Instructions Manual

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.
WARNING
Electric Shock Hazard. Can cause
injury or death. Unit must be properly
grounded in accordance with national
and local codes.
WARNING
Fire Hazard. Use of aluminum wire with this product
may result in a fire, causing property damage, severe
injury or death. Use copper wire only with this
product.
The unit is equipped with a field make-up box on the left
hand side of the cabinet. The make-up box may be moved
to the right side of the furnace to facilitate installation. If the
make-up box is moved to the right side, clip the wire ties
that bundle the wires together. The excess wire must be
pulled into the blower compartment. Secure the excess
wire to the existing harness to protect it from damage.
INTERIOR MAKE-UP BOX INSTALLATION
MAKE-UP
BOX
FIGURE 56
Refer to figure 59 for unit schematic and field wiring. See
figures 57 and 58 for icomfort Wi-Fi
communicating applications. Table 11 shows DIP switch
and on-board link settings for non-communicating thermo­
stat applications. Typical wiring schematic is shown in fig­
ure 59.
remove and relocate
plug to unused
opening on left side
Right Side
®
thermostat wiring in
The power supply wiring must meet Class I restric­
tions. Protected by either a fuse or circuit breaker, se­
lect circuit protection and wire size according to unit
nameplate.
Failure to use properly sized wiring and circuit
breaker may result in property damage. Size wiring
and circuit breaker(s) per Product Specifications
bulletin (EHB) and unit rating plate.
NOTE - Unit nameplate states maximum current draw.
Maximum over-current protection allowed is shown in table
10.
EL296UH Model
045V36B, 070V36B, 090V36C,
090V48C, 110V48C
090V60C, 110V60C, 135V60D
Holes are on both sides of the furnace cabinet to facili­
tate wiring.
Install a separate (properly sized) disconnect switch
near the furnace so that power can be turned off for
servicing.
Before connecting the thermostat or the power wiring,
check to make sure the wires will be long enough for
servicing at a later date. Remove the blower access
panel to check the length of the wire.
Complete the wiring connections to the equipment.
Use the provided unit wiring diagram and the field wir­
ing diagrams shown in table 11 and figure 59. Use
18-gauge wire or larger that is suitable for Class II ra­
ting for thermostat connections.
Electrically ground the unit according to local codes or,
in the absence of local codes, according to the current
National Electric Code (ANSI/NFPA No. 70). A green
ground wire is provided in the field make-up box.
NOTE - The EL296UHV furnace contains electronic
components that are polarity sensitive. Make sure
that the furnace is wired correctly and is properly
grounded.
One line voltage "ACC" 1/4" spade terminal is provided
on the furnace integrated control. Any electronic air
cleaner or other accessory rated up to one amp can be
connected to this terminal with the neutral leg of the cir­
cuit being connected to the one of the provided neutral
terminals. See figure 60 for control configuration. This
terminal is energized when the indoor blower is operat­
ing.
Page 39
CAUTION
TABLE 10
Maximum Over-Current
Protection (Amps)
15
20