LE6XRT ERV
RENEWAIRE.COM
INSTALLATION, OPERATION AND MAINTENANCE MANUAL
1.800.627.4499
26
ELECTRICAL CONNECTIONS
7.3.2 Single 2 - Wire Control, Separate Power
7.3.3 Control Sending 24 VAC “ON” Signal
7.3.4 External Control Using ERV Power Supply
7.3.5 Control with 2 Non-Powered Relay Contacts
Use the schematic shown in Section 7.3.1 if the control is on a separate power supply with no power
present at control output.
Use the schematic below if a 24 VAC “ON” signal is to be sent from an external power source to the
ERV.
• Verify that a jumper is NOT installed between terminals 2 and 3.
24 VAC can be safely applied to terminals 3 and 4 to operate the ERV’s isolation relay for the OA / FA
blower.
• Install a jumper (provided) between terminals 4 and 5 to operate the ERV’s isolation relay for the
RA / EA blower.
• Supply only 24 VAC (not VDC) from a Class II power source.
Use the schematic below if external control is to be applied using 24 VAC from the ERV power supply.
• External control system must not draw more than 8 VA.
• Install jumper (provided) between terminals 2 and 3.
• Connect the switched output of the control to terminal 4 to operate the ERV’s isolation relay for
the OA / FA blower.
• Install jumper between terminals 4 and 5 to operate the ERV’s isolation relay for the RA / EA
blower.
Use the following schematic if the external control system provides no voltage or current at its output
contacts.
• Install jumper between terminals 2 and 3.
• Connect one side of each of the output contacts to terminal 1.
• Connect the other side of the output contact to terminal 4 in order to control the FA blower.
• Connect the other side of the output contact to terminal 5 in order to control the EA blower.
24 VAC From External Source
External Control Using ERV 24 VAC
