16
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 as follows:
NOTES:
■
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 in the “Optional
Accessories Wiring” illustration.
Optional Accessories Wiring
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 terminals (HUM) are
energized with 115 volts whenever the induced draft blower is
energized. The integrated control module electronic air cleaner
terminals (EAC) are energized with 115 volts whenever the
circulator blower is energized.
24-Volt Humidifier
A 5" (12.7 cm) long brown wire in the wire harness at the low-fire
pressure switch provides 24 VAC humidifier control. This wire is
powered any time the pressure switch is closed. To connect
24 VAC HUM, connect the 24 VAC line of the humidifier to the 5"
(12.7 cm) brown wire. The connection can be made by either
stripping the wire and using a wire connector or by using a
field-supplied quick connect terminal. The wiring must conform
to all local and national codes. Connect the COM side of the
humidifier to the C terminal on the furnace control board (or to
the COM side of the 24 VAC transformer).
NOTE: Do not connect 115-volt humidifier to these terminals.
GAS SUPPLY AND PIPING
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 Inlet Gas Supply Pressure chart. 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 avoid unreliable ignition. The maximum
must not be exceeded to keep the furnace from overfiring.
Humidifier
1.0 Amp maximum at 120 VAC
Electronic Air Cleaner
1.0 Amp maximum at 120 VAC
HIGH VOLTAGE!
WARNING
To avoid personal injury or death due to
electrical shock, disconnect electrical
power before servicing or changing any
electrical wiring.
15-Circuit Connector
Integrated Control Module
Humidifier
Electronic
Air Cleaner
To prevent unreliable operation or equipment damage,
the inlet gas supply pressure must be as specified on the
unit rating plate with all other household gas-fired
appliances operating.
CAUTION
Inlet Gas Supply Pressure
Natural gas
5.0" W.C. minimum; 10.0" W.C. maximum
Propane gas
11.0" W.C. minimum; 13.0" W.C. maximum
