User Guide

Electrical Connections

It is recommended that a licensed electrician make all

electrical connections. It is very important that the unit

be properly grounded. The circuit must be sized to han-

dle the F.L.A. indicated on the name tag for the circuit.

WARNING: Verify the polarity of the power coming into

the unit with a test lamp or multimeter. Connect the

multimeter or test lamp probe to the wire being tested

and the other probe to ground. The black line should be

“live”. If the white line is “live” the polarity is reversed

and must be corrected. If both lines are live, the voltage

is not 120VAC. The black open line from the unit should

be connected to the live line and the white open line

should be connected to the neutral line. Some unit have

a safety disconnect rocker switch located just outside of

the electrical control box area. The switch disconnects

the live line. Verify that it is working properly with a

multimeter or test lamp. Always ensure the ERV is

properly grounded before and after testing.

The ERV is designed to operate with ducting.

When first starting the ERV, measure the amp

draw to each motor at each speed to ensure it

is operating at or below the max rating.

CAUTION

Maximum AMP Rating

HIGH MED. LOW

1230ERV 9.4 6.0 4.5

730ERV 4.5 3.2 2.4

530ERV 3.2 2.4

330ERV 2.0 1.4 1.0