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ACAUTION
These units operate on 120 volt, single phase, 60 hz
electrical power. Refer to figure 20 for field wiring and
figure 22 for schematic wiring diagram and trouble-
shooting.
1 - Select circuit protection and wire size according to the
unit rating plate.
2 - Knockouts are provided on both sides of the fumaca
cabinet to facilitate widng.
3 - install the room thermostat according to instructions
provided with the thermostat.
4 - install a separate disconnect switch (protected by ei-
ther fuse or circuit breaker) near the unit so power can
be turned off for servicing.
5 - Before connectJng the thermostat or the power widng,
check to make sure the wires will be long enoughto
facilitate servicing at a later date. Remove the blower
access panel and open the panel to check wirelength
for access.
6 ° Complete wiring connectionsto theequipmentusing
wiringdiagram providedwithunitandwidngdiagrams
showninfigures 20 and 22. Use 18 gaugewire or larg-
er for thermostatconnections.
7 - Electricallygroundtheunit accordingto 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.
NOTE- The G24M furnace contains electronic com-
ponents that are polarity sensitive. Make sure that
the furnace is wired correctly and is properly
grounded.
8 - One tinevoltage accessory "ACC" terminal is provided
on the furnace control board with a protective plastic
cap. Any accessory rated up to 4 amps can be con-
nected to this terminal(after removing the protective
cap) with the neutral leg of the circuitbeing connected
to the line voltage neutral wire. See figure 21 for con-
trol board configuration. This terminal is energized
whenever the blower is in operation.
9 - One line voltage heating accessory"HTG ACC" termi-
nal is provided on thefumaco control board with a pro-
tective plastic cap. Any accessory rated up to 4 amps
can be connectedto this terminal (after removing the
protective cap) with the neutral leg of the circuit being
connected to the line voltage neutral wire. See figure
21 for control board configuration. This terminal is en-
ergized in the heating mode whenever the blower isin
operation.
Indoor Blower Speeds (Refer to Figure 22)
1 - When the thermostatis set to "FAN ON", the indoor
blowerwillruncontinuouslyon low speedwhen there
isno coolingor heatingdemand.
2 - When the G24M is running inthe heatingmode, the in-
doorblowerwillrun on the heatingspeed.
3 - When there is a coolingdemand,the indoorblowerwill
run on thecoolingspeed.
Page21
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