10
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
H) is energized with 115 volts whenever the induced draft
blower is energized. The integrated control module electron-
ic air cleaner terminal (EAC H) 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 electri
-
cal shock, disconnect electrical power before
servicing or changing any electrical wiring.
115 VAC EAC
115 VAC HUM
W R G C Y
Accessories - Accessories Wiring
Low Voltage Humidifier
The furnace integrated control module is equipped with a low
voltage terminal for providing power to an optional field-sup
-
plied 24 volt humidifier. The 24V HUM terminal is energized
any time the draft inducer is powered. See connection dia
-
gram below.
NOTE: This is a 24 volt circuit only, the common con
-
nection must be on C terminal of the low voltage
terminal strip (where thermostat wires are con
-
nected). Wiring for this circuit must NOT be con
-
nected to the line N location where line voltage
neutral wires are connected.
24 VOLT HUM. &
HUMIDISTAT
W R G C Y
24V HUM Terminal is
energized when pressure
switch is closed
24 Volt Humidifier Connection
Furnace Startup
1.
Close the manual gas shutoff valve external to the
furnace.
2.
Turn off the electrical power to the furnace.
3. Set the room thermostat to the lowest possible setting.
4. Remove the burner compartment door.
NOTE: This furnace is equipped with an ignition de
-
vice which automatically lights the burner. Do not
try to light the burner by hand.
5.
Move the furnace gas valve manual control to the
OFF position.
6.
Wait five minutes then smell for gas. Be sure check
near the floor as some types of gas are heavier than
air.
7.
If you smell gas after five minutes, immediately follow
the safety instructions in the Safety Considerations
on page 2 of this manual. If you do not smell gas af
-
ter five minutes, move the furnace gas valve manual
control to the ON position.
8. Replace the burner compartment door.
9.
Open the manual gas shutoff valve external to the
furnace.
10.
Turn on the electrical power to the furnace.
11. Adjust the thermostat to a setting above room tem-
perature.
12.
After the burners are lit, set the thermostat to desired
temperature.