LE6XRT ERV
RENEWAIRE.COM
INSTALLATION, OPERATION AND MAINTENANCE MANUAL
1.800.627.4499
30
START-UP
9.0 START-UP
9.1 VERIFY CORRECT FAN ROTATION DIRECTION
9.2 BASIC OPERATIONAL CHECK
The first time power is applied to the fan motors, it should be just a brief pulse so that the fans will
begin spinning. Verify that the fans are turning the correct direction. If a fan is turning the wrong
direction, it will be because a three-phase power source has been improperly connected.
PREPARE FOR TESTING
• Disconnect power to the unit at the branch circuit supply. Lock and tag the disconnect. Place the
unit disconnect switch (on the front of the E-Box) in the OFF position.
• Remove the cover to the E-Box.
• Confirm that internal wiring from the Unit E-Box to the Exhaust Air Blower is complete.
• If optional Exhaust Air or Fresh Air Outside Air Dampers are provided, confirm that internal wiring
from the Unit E-Box to the Damper Actuators has been connected.
• Confirm Overload Relays on the Motor Starters are set correctly.
• At the low-voltage terminals, install a jumper between terminals 2 & 3. Install jumpers between
terminals 1 and 4, and between 4 and 5. This will call for unit operation as soon as power is
supplied to the unit.
See wiring schematics in Section 6.5 of this manual.
• Reinstall the E-Box cover. If the ERV has any VFDs, remove the upper portion of the E-Box cover,
which houses the VFD keypads.
• Turn on the branch circuit supply power at the fuse box.
• Turn the Disconnect Switch on the face of the E-Box to the ON position.
ERVs that are equipped
with dampers should
be tested at start-
up to verify that the
dampers will open fully.
9.2.1 Motor Starter Units
Units without dampers - both motors should begin running immediately.
Units with dampers - dampers should begin opening immediately. After about 30 seconds,
damper actuator end switches will engage and provide a call for operation to the appropriate
motor starter. The controlled motor should then start.
• Turn Disconnect Switch on the face of the E-Box to the OFF position. Disconnect power at the
branch circuit supply. Lock and tag the disconnect.
• Disconnect jumper from terminal 1 to terminal 4, but otherwise leave the jumpers in place for the
convenience of following contractors.
9.2.2 VFD Units
• Turn the Disconnect Switch on the face of the E-Box to the ON position.
Units without dampers - if there is only one VFD, the motor that is not controlled by a VFD should
begin to run immediately. Any motor controlled by a VFD will not start until the VFD is activated.
• To activate a controlling VFD, wait for a display to appear on the keypad(s), located near the
top of the E-Box.
• On each keypad, press the HAND button. The controlled motor should begin running at a slow
speed.
• On each keypad, press the UP / DOWN hard buttons to set the motor speed as desired.
• Verify that the motor’s amps are no greater than the motor FLA as listed on the nameplate.
Units with dampers – the dampers should start opening immediately. After about 30 seconds the
damper actuator end switches will engage.
• Turn Disconnect Switch on the face of the E-Box to the OFF position. Disconnect power at the
branch circuit supply. Lock and tag the disconnect.
• Disconnect jumper from terminal 1 to terminal 4, but otherwise leave the jumpers in place for
the convenience of following contractors.
