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FURNACE (IFC) OR AIR
CHARGE AIR SENSOR
(SEE DAS NOTES)
OPTIONAL OUTDOOR
AIR SENSOR (SEE OAS
NOTES)
HD
Smart
Display
Hub
Subbase
FLOAT
SWITCH
COMMUNICATING
INDOOR UNIT
COMMUNICATING
FURNACE UNIT
(2 STAGE)
DS
CUT
R-DS
R
W914
COMMUNICATING
INDOOR UNIT
C
FLOAT
SWITCH
COMMUNICATING
INDOOR UNIT
HEPA BYPASS FILTER X2680 HEPA
INTERLOCK KIT
MAY NEED TO WRAP WIRE MULIPLE TIMES TO
GET AMP DRAW HIGHER (1 AMP) TO MAKE
SENSOR WORK CORRECTLY.
Figure 54. Installing Comfort Sync A3, Communicating Indoor Unit, Float Switch, HEPA Bypass Filter Interlock
508364-01
HANDLER (AHC)
Figure 53. Comfort Sync A3 with Humidifier Accessory
COMMUNICATING
OUTDOOR UNIT
(POWER COMPANY INTERRUPTION
SYSTEMS ARE WIRED SAME AS
OVERFLOW SWITCH)
THERMOSTAT OR DAMPER
CONVENTIONAL
OUTDOOR UNIT
(1 OR 2 STAGE)
C
TOR COMMON WIRE
THROUGH CURRENT LOOP.
SEE HEPA INTERLOCK KIT
FOR INSTALLATION DETAILS
Kit, Humidifier, Relay and FreezeStat
24VAC UV Light Applications: In any Allied communicating system, the indoor unit will
NOT have adequate power to to run the 24VAC UV light application. An additional transformer
will be required. UV light wiring connections are independent of the HVAC system operation
(refer to UV light installation instruction.
Humidity Control Applications: The Comfort Sync A3 thermostat can sense humidity and controls
both 24VAC "H" and 120VAC "H" outputs to cycle humdifier based on demand. No other
control or humidistat is required. Optional outdoor air temperature sensor for use with humidifier
(if not already in the system for other function and are typically built into all Allied communicating
outdoor units
ERV / HRV
120VAC<-------HUMIDIFIER CONNECTIONS------> 24VAC
COMMUNICATING
INDOOR UNIT
COMMUNICATING
CONTROL MODULE
Issue 2346
Smart
Hub
COMMUNICATING
FURNACE
48G96 Relay
COMMUNICATING
OUTDOOR UNIT
HD
Display
Wall-Mount
GND
IN
Page 39 of 74
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