Electrical - Lennox EL195UHE Elite Series Installation Instructions Manual

Electrical

ELECTROSTATIC DISCHARGE (ESD)
Precautions and Procedures
CAUTION
Electrostatic discharge can affect elec-
tronic components. Take precautions to
neutralize
touching your hand and tools to metal
prior to handling the control.
INTERIOR MAKE−UP BOX INSTALLATION
MAKE−UP
BOX
FIGURE 62
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 63 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.
electrostatic charge
remove and relocate
plug to unused
opening on left side
Right Side
Complete the wiring connections to the equipment. Use the
provided unit wiring diagram and the field wiring diagram
shown in figure 63. 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.
by
NOTE − The EL195UHE furnace contains electronic
components that are polarity sensitive. Make sure that the
furnace is wired correctly and is properly grounded.
Accessory Terminals
One line voltage EAC" 1/4" spade terminal is provided on
the furnace integrated control. See figure 64 for integrated
control configuration. This terminal is energized when the
indoor blower is operating. Any accessory rated up to one
amp can be connected to this terminal with the neutral leg
of the circuit being connected to one of the provided neutral
terminals. If an accessory rated at greater than one amp is
connected to this terminal, it is necessary to use an exter-
nal relay.
One line voltage 120 HUM" 1/4" spade terminal is provided
on the furnace integrated control. See figure 64 for inte-
grated control configuration. This terminal is energized in
the heating mode when the combustion air inducer is
operating. Any humidifier rated up to one amp can be con-
nected to this terminal with the neutral leg of the circuit be-
ing connected to one of the provided neutral terminals. If a
humidifier rated at greater than one amp is connected to
this terminal, it is necessary to use an external relay relay.
One 24V "H" 1/4" spade terminal is provided on the furnace
integrated control. See figure 64 for integrated control con-
figuration. The terminal is energized in the heating mode
when the combustion air inducer is operating and the pres-
sure switch is closed. Any humidifier rated up to 0.5 amp
can be connected to this terminal with the ground leg of the
circuit connected to ground or the "C" terminal.
Install the room thermostat according to the instruc-
tions provided with the thermostat. See figure 63 for
thermostat designations. If the furnace is being
matched with a heat pump, refer to the FM21 installa-
tion instruction or appropriate dual fuel thermostat in-
structions.
Indoor Blower Speeds
1 − When the thermostat is set to FAN ON," the indoor
blower will run continuously on the fan speed (FAN)
when there is no cooling or heating demand.
2 − When the EL195UHE is running in the heating mode,
the indoor blower will run on the heating speed (HEAT).
3 − When there is a cooling demand, the indoor blower will
run on the cooling speed (COOL).
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