Electrical - Lennox G61MPV?36B?045 Installation Instructions Manual

Electrical

ELECTROSTATIC DISCHARGE (ESD)
Precautions and Procedures
CAUTION
Electrostatic discharge can affect electronic
components. Take precautions during furnace
installation and service to protect the furnace's
electronic controls. Precautions will help to avoid
control exposure to electrostatic discharge by putt-
ing the furnace, the control and the technician at the
same electrostatic potential. Neutralize electrostat-
ic charge by touching hand and all tools on an un-
painted unit surface, such as the gas valve or blower
deck, before performing any service procedure.
INTERIOR MAKE−UP BOX INSTALLATION
MAKE−UP
BOX
FIGURE 53
INTERIOR MAKE−UP BOX INSTALLATION
Left side
FIGURE 54
Right Side
MAKE−UP
BOX
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. If the make−up box is moved to the right
side, the excess wire must be pulled into the blower
compartment. Secure the excess wire to the existing harn-
ess to protect it from damage.
Refer to figure 55 and table 11 for field wiring and figure 58
for schematic wiring diagram and troubleshooting.
1 − 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.
NOTE − Unit nameplate states maximum current draw.
Maximum Over−Current Protection allowed is 20AMP.
2 − Holes are on both sides of the furnace cabinet to facili-
tate wiring.
3 − Install a separate (properly sized) disconnect switch
near the furnace so that power can be turned off for
servicing.
4 − 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.
5 − Complete the wiring connections to the equipment.
Use the provided unit wiring diagram and the field wir-
ing diagram shown in figure 55 and table 11. Use
18−gauge wire or larger that is suitable for Class II ra-
ting for thermostat connections.
NOTE − Do NOT make a wire connection between
the room thermostat L terminal and the L terminal
of the G61MPV integrated control.
6 − 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) 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 G61MPV furnace contains electronic
components that are polarity sensitive. Make sure that
the furnace is wired correctly and is properly grounded.
7 − One line voltage EAC" 1/4" spade terminal is provided
on the furnace control board. Any electronic air cleaner
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. See figure 56 for
control board configuration. This terminal is energized
when the indoor blower is operating.
8 − One line voltage HUM" 1/4" spade terminal is provided
on the furnace control board. Any humidifier rated up
to one amp can be connected to this terminal with the
neutral leg of the circuit being connected to one of the
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