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ELECTROSTATIC
DISCHARGE (ESD)
Precautions and Procedures
&CAUTION
INTERIOR MAKE-UP BOX INSTALLATION
MAKE-UP
BOX
Right Side
6
FIGURE 38
INTERIOR MAKE-UP BOX INSTALLATION
Left side
MAKE-UP
o
BOX
FIGURE 39
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 40 and table 10 for field wiring and figure 41
for schematic wiring diagram and troubleshooting.
1 - Select circuit protection and wire size according to the
unit nameplate. The power supply wiring must meet
Class I restrictions.
2 - Holes are on both sides of the furnace cabinet to facili-
tate wiring.
3 - Install a separate disconnect switch (protected by ei-
ther fuse or circuit breaker) 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 40 and table 10. Use
18-gauge wire or larger that is suitable for Class II ra-
ting for thermostat connections.
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.
7 - One line voltage "EAC" 1/4" spade terminal is provided
on the furnace integrated control. Any electronic air
cleaner rated up to one amp can be connected to this
terminal with the neutral leg of the circuit being con-
nected to one of the provided neutral terminals. See
figure 42 for integrated control configuration. This ter-
minal is energized when the indoor blower is operating.
8-
One line voltage *'HUM" 1/4" spade terminal is pro-
vided on the furnace integrated control. 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 provided neutral terminals. See figure 42 for
integrated control configuration. This terminal is ener-
gized in the heating mode when the combustion air in-
ducer is operating.
9 - One 24V "H" terminal is provided on the furnace inte-
grated control terminal block. Any humidifier rated up
to 0.5 amp can be connected to this terminal with the
ground leg of the circuit being connected
to either
ground or the "C" terminal. See figure 42 for integrated
control configuration.
Page 27
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