Greenheck Vari-Flow Air Management System(476251) - Manual (Page 6)

6 Vari-Flow Air Management System
Variable Frequency Drives (VFD) - if equipped
NOTE
If electrically commutated motors are being used,
VFDs will not be needed.
1. Bring power to the input of each VFD from a
dedicated power source using conduit to the
NEMA-1 enclosure on the bottom of the drive. Each
power source shall be of the same voltage as the
respective fan and of a high enough amp rating to
handle the full load amp draw of the respective fan.
2. To avoid interference between the conductors,
separate conduit from the VFD output to the input
power of the fan must be used for each fan.
NOTE
The VFD motor overload parameter (E2-01) need to
be set to the motor nameplate FLA. Refer to the Quick
Start Guide from Yaskawa (pages 83-89) for setting
these parameters on the Yaskawa drive.
NOTE
Be sure to use appropriately sized wire for the full load
amp draw.
VFD Provided by Others, Control Wiring - if equipped
• Fault command from Vari-Flow to VFD provided by
others (Terminal E__-FA, E__-FB)
• Run command from Vari-Flow to VFD provided by
others (Terminal E__-RA, E__-RB)
• Speed reference from Vari-Flow to VFD provided by
others (Terminal E__S+, E__S-)
• Line power to VFD
• Load power from VFD to fan
This is an example of Exhaust Fan 1 provided with a VFD by others.
L3
COMMON
L2 L1 T3 T2 T1
NORMALLY OPEN
RUN COMMAND
RUN COMMAND
SPEED REFERENCE +
E1-FA
E1-FB
E1-RA
E1-RB
E1-S+
E1-S-
VFD-F1-E
MARK: VFD BY
OTHERS
VOLT/PH
HP
VFD BY OTHERS
LINE LOAD
SPEED REFERENCE -
FAULT CONTACT
VFD BY
OTHERS
S+
S-
R+
L3
LINE
R-
IG
L2 L1 T3
LOAD
T2 T1
VFD-F1-E
MARK: FAN MARK
VOLT/HP
MODBUS VFD
ADDRESS: X
S2
Each variable frequency drive must have the
LINE and LOAD wiring in separate conduit
MODBUS VFD
OFF
Vari-Green® Fan Wiring - if equipped
• 24 VAC from Vari-Flow to Vari-Green motor control
wire, black (Terminal E__-24)
• 0-10 VDC Speed Reference from Vari-Flow to
Vari-Green motor control wire, red (Terminal E__S+)
• Common from Vari-Flow to Vari-Green motor control
wire, white (Terminal E__S-)
This is an example of Exhaust Fan 1 provided with a Vari-Green motor.
G
LINE
N H
VFD-F1-E
MARK: VG
115/1
0.75 HP
VARI-GREEN
24 VAC RUN (BLACK)
SPEED REF. + (RED)
SPEED REF. - (WHITE)
NOTE: POWER FOR THE
VARI-GREEN FAN GOES
DIRECTLY TO FAN
E1-24
E1-S+
E1-S-
V
A
RI-GREEN MOT
O
R
®