25
Room
Thermostat
Y2
Y
W
W2
R
G
C
Ylo
Y
W
W2
R
G
C
Ylo
Y
W
W2
R
G
C
Furnace 1
Furnace 2
Figure 37
115 Volt Line Connection of Accessories
(Humidifier and Electronic Air Cleaner)
The furnace integrated control module is equipped with
line voltage accessory terminals for controlling power to
an optional field-supplied humidifier and/or electronic air
cleaner.
The accessory load specifications are noted in the chart
below:
Humidifier
1.0 Amp maximum at 120 VAC
Electronic Air Cleaner
1.0 Amp maximum at 120 VAC
Turn OFF power to the furnace before installing any
accessories. Follow the humidifier or air cleaner
manufacturers’ instructions for locating, mounting,
grounding, and controlling these accessories. Accessory
wiring connections are to be made through the 1/4” quick
connect terminals provided on the furnace integrated
control module. The humidifier and electronic air cleaner
hot terminals are identified as HUM and EAC. The
humidifier and electronic air cleaner neutral terminals are
identified as NEUTRAL. All field wiring must conform to
applicable codes. Connections should be made as shown.
If it is necessary for the installer to supply additional line
voltage wiring to the inside of the furnace, the wiring
must conform to all local codes, and have a minimum
temperature rating of 105°C. All line voltage wire splices
must be made inside the furnace junction box.
The integrated control module humidifier terminal (HUM) is
energized with 115 volts whenever the induced draft blower
is energized. The integrated control module electronic
air cleaner terminal (EAC) is energized with 115 volts
whenever the circulator blower is energized. This terminal
can also be used to provide 115 volt power to a humidifier
transformer. The remaining primary transformer wire would
be connected to the Line N on the control board.
WARNING
HIGH VOLTAGE
To avoid personal injury or death due to
electrical shock, disconnect electrical power
before servicing or changing any electrical
wiring.
Accessories - Accessories Wiring
Figure 38
GAS SUPPLY AND PIPING
WARNING
To avoid possible unsatisfactory operation of equipment
damage due to underfiring equipment, use the proper size of
natural/propane gas piping needed when running pipe from
the meter/tank to the furnace.
Natural Gas
Minimum: 4.5" w.c.
Maximum: 10.0" w.c.
Propane Gas
Minimum: 11.0" w.c. Maximum: 13.0" w.c.
INLET GAS SUPPLY PRESSURE
The furnace rating plate includes the approved furnace gas
input rating and gas types. The furnace must be equipped
to operate on the type of gas applied. This includes any
conversion kits required for alternate fuels and/or high
altitude.
Inlet gas supply pressures must be maintained within the
ranges specified in the adjacent table. The supply pressure
must be constant and available with all other household
gas fired appliances operating. The minimum gas supply
pressure must be maintained to prevent unreliable ignition.
The maximum must not be exceeded to prevent unit
overfiring.
Содержание *MEC96
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