GeneralAire ERV 3220 - Manual (Page 20)

INSTALLATION
GUIDE
20
Standard Forced Air
Interlocking Wiring
A relay is normally used when tying a
ventilation system onto forced air
distribution system. Our Duotrol System
is equipped with an internal relay that
will activate the forced air system’
ventilator when there is a demand from
the HRV/ERV. The Duotrol System will
activate the INTERLOCK relay during the
following modes: Continuous, Override,
Recirculation and Defrost. See wiring
diagram.
Alternate Forced Air
Interlocking Wiring
Some forced air system thermostat will
activate the cooling system when tied
using the “Standard forced air
interlocking wiring”.
If you have identify this type of
thermostat you must proceed with the
“Alternate forced air wiring”.
Locating the
Wiring Diagram
to installer
Wiring diagram for the entire line of
professional and furnace models
are placed on the back of each
exhaust motor bracket.
16. Wiring Diagram
Standard Forced Air Interlock Wiring
Alternate Forced Air Interlock Wiring
*Before tying the HRV/ERV to a
forced air system, always refer to
system’s manual or manufacturer.