26
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 single humidifier terminal
(HUM) is 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. 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.
In addition, the control is equipped with a dedicated
humidification relay which is available through ¼ inch
terminals HUM-IN and HUM-OUT. Similar to the HUM
terminal, when utilizing legacy connections, this relay will
be closed during normal heating operation. HUM IN must be
powered with the desired voltage (24 vac from the R terminal
or 115 vac from L1 terminal). The internal relay will close
during a call for heat. Also, the control can provide additional
humidification features when wired to a communicating
thermostat (1, 2, R, C connections). If the communicating
thermostat is not capable of providing a humidification call,
this dedicated relay will function exactly as mentioned above
with a legacy setup. If the communicating thermostat is
capable of providing a humidification call the user is now
provided with 3 modes of operations which can be selected
within the thermostat user menu.
1. ON: Humidifier is turned on with a heat demand.
2. OFF: Humidifier remains off (relay never closes).
3. IND: Humidifier will cycle with humidification demand,
independent of heat demand. This mode allows the
user to select one of 4 fan speeds (25, 50, 75, and
100%).
Accessories Wiring
Figure 35
NEUTRAL
HU
M
-O
U
T
HU
M
-IN
Figure 36A
24 VOLT
COMMON
HU
M
-OU
T
HU
M
-IN
Figure 36B
A
UXILIARY
A
LARM
S
WITCH
:
The control is equipped with a 24VAC Auxiliary Alarm Input
(12 inch purple / white wire attached to pin 6 of 15 pin
connector) which can be utilized with communicating mode
setups (typically used for condensate switch wiring but could
be used with compatible C0
2
sensors or Fire Alarms).
Legacy mode use
In a legacy system (Non-communicating), this auxiliary alarm
input is not operational. Any auxiliary alarm switch must be
used to interrupt Y1 signal either to IFC or to UC.
Communication mode use
This feature can be activated or deactivated through the
thermostat user menus. By default, an AUX switch is normally
closed and opens when the water level in the evaporator coil
base pan reaches a particular level. The control will respond
by turning off the outdoor compressor and display the proper
fault codes. If the AUX switch is detected closed for 30
seconds, normal operation resumes and error messages are
no longer displayed. Installer must wire control voltage
(24VAC) to AUX switch to ensure the Auxiliary Alarm Input
has 24VAC during normal operation.
G
AS
S
UPPLY
AND
P
IPING
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.
