OPERATION
INITIAL STARTUP
CAUTION
230V Power Supplies
ERVs rated for 208-230VAC
power supplies are shipped with
VFD parameters set for 208V
operation. For 230VAC operation,
change the following Parameters:
- 2003 MAX CURRENT Change to
no more than 125% of motor
FLA for 230V, as listed on the
unit nameplate.
- 9905 MOTOR NOM VOLT
Change from 208V to 230V.
- 9906 MOTOR NOM CURR
Change to match the motor
FLA for 230V, as listed on the
unit nameplate.
10
RENEWAIRE.COM
ABB VFD SUPPLEMENTAL MANUAL
ABB VARIABLE FREQUENCY DRIVES
TO START ERV
1. Turn off power to the ERV at its Disconnect Switch.
Make sure the ERV is wired to provide an ON signal. (See Control Wiring Schematics later in this
Manual.) You may need to install a temporary jumper at the ERV or VFD low-voltage terminal strip.
VFDs are set at the factory to respond to the keypad. If an external controller providing an analog
input is connected to the VFD, you may want to temporarily disconnect it.
Close ERV doors and main cover for the E-box; leave keypads accessible.
2. Turn on power to the ERV at its Disconnect Switch.
Wait for keypad display to appear.
3. For each VFD:
Press the HAND button on the keypad. Motor should start running at about 425 RPM.
Use the UP/DOWN buttons to set motor speed as desired. Confi rm the motor amps are no greater
than the motor FLA as listed on the unit nameplate.
4. To transfer control of the VFD to a control system:
Press the OFF button on the keypad. Motor should stop running.
Change the VFD parameters as required for the specifi c controls system (see "Control Connections"
and "VFD Parameters", below, for examples; see also the ABB Manuals.)
Press the AUTO switch on the keypad.
MOTOR PROTECTION BY THE VFD(s)
Each VFD in this unit protects one motor against overload. It is critical that the VFD MAX CURRENT be
properly set at no more than 125% of the Full Load Amps (FLA) of the motor (115% of FLA if motor service
factor is less than 1.15 and the motor is not otherwise protected). The following Parameters must be set
correctly and individually for each VFD to match the characteristics of the motor attached to it:
2003
MAX CURRENT
3007
MOTOR LOAD CURVE %
9905
MOTOR NOM VOLT
9906
MOTOR NOM CURR
9909
MOTOR NOM POWER
These parameters are set at RenewAire to match the motor controlled by the VFD. In most cases they
should not be changed.
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