Forced Air System; Trueiaq (Dg115Eziq) Wiring; Alternate Interlock Wiring With Forced Air System - Honeywell TrueFRESH ERV Professional Installation Manual

Wiring (continued)
Follow this diagram
for Alternate Interlock
Wiring with Forced Air
System
The ERV/HRV is interlocked with the forced air system and is used in conjunction with older-style
thermostats where the G and Y terminals are coupled together in the thermostat (fan and cool are
simultaneously energized).
This wiring method will prevent turning on the cooling system when the ventilator turns on the furnace fan.
NOTE: Only use this wiring method for systems where G and Y are coupled at the thermostat.
Follow this diagram if using a
TrueIAQ (DG115EZIQ).
22
FAN TIMER
OR OTHER
WALL
CONTROL
G
Y
W
R
OLDER -STYLE
THERMOSTAT
FAN (G) & COOL (Y)
ARE COUPLED
TrueIAQ
VENT
VENT
DEHUM
DEHUM
TrueFRESH™ ERV/HRV Ventilation Systems 69-2480EF—05
POWERED
VENTILATOR
C
Y
W
G
R

FORCED AIR SYSTEM

(FURNACE)
24-VOLT
TERMINAL BLOCK
M28992
M28993