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transformer wire would be connected to the Line N on the control board.The integrated
control module electronic air cleaner terminals (EAC) are energized with 115 volts whenever the
circulator blower is energized.
In addition, the control is equipped with a dedicated humidification relay which is avail-
able 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%).
A
A
S
UXILIARY
LARM
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 (typi-
cally used for condensate switch wiring but could be used with
compatible C0
sensors or Fire Alarms).
2
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 ther-
mostat user menus. By default, an AUX switch is normally closed
:
NEUTRAL
NEUTRAL
24 VOLT
COMMON
27
Accessopries Wiring
Figure 35
Figure 36A
Figure 36B
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Troubleshooting
