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Page 10
AIRCOM RELAYS & INTERLOCKING TO A FURNACE/AIR HANDLER
The circuit board has three available “dry contact” relays. Contact 3 is not available.
Maximum 115V, 10 amp resistive load.
Contact 1
These relays initiate whenever the HRV is in defrost.
Contact 2 and 4
These relays initiate whenever the HRV fans are operating.
• Use contact 2 or 4 to interlock the HRV to an Air Handler or Furnace.
Note: Connecting the HRV as illustrated will ensure the Air Handler Blower Motor is operating
whenever the HRV is ventilating.
• Consideration must be given to competing air flows when connecting the HRV in conjunction
with an Air Handler/Furnace Blower system.
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