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7
Remote Control Connections
Electrical connections should be made by a qualified ser-
vice technician. Low voltage wires from the remote
controls are connected to the damper motor terminals.
Identify the appropriate installation type and connect as
per illustration.
In order to prevent electric shock when cleaning
or servicing the HRV, it is extremely important to
confirm the polarity of the power line that is
switched by the safety (disconnect) switch. The
hot line (black) is the proper line to be switched.
To confirm the proper polarity, use a voltmeter
or test lamp to ensure there is no power after
the switch when the door is open. Check
between that point and ground (on the cabinet).
Always make sure that the HRV is properly
grounded.
WARNING
Electrical - Model 94-EXCHANGER-MD ONLY
OPTIONAL
TRANSFORMER
120 VAC
24 VAC
OPTIONAL
TRANSFORMER
120 VAC
OPTIONAL
TRANSFORMER
120 VAC
OPTIONAL RELAY (SPST)
OPTIONAL RELAY (SPST)
On older thermostats, energizing the R and G
terminals at the forced air system has the effect
of energizing the Y terminal at the thermostat
and thereby activating the cooling system. If you
identify this type of thermostat, you must use
option 3.
WARNING