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VAV-SVN01E-EN
Wiring
Diagrams
Figure 24 – Fan-Powered Units with ECM
FOR SERIES FAN POWERED TERMINAL UNITS ONLY.
EXTERNAL TO CONTROL BOX.
OPTIONAL OR ALTERNATE CIRCUITRY
DISCONNECT SWITCH, FUSE, & SCR ARE LOCATED
DETERMINED BY MOTOR VOLTAGE ON ORDER.
FUSE IS OPTIONAL.
VOLTAGE FOUND ON UNIT NAMEPLATE.
5.
4.
3.
FACTORY INSTALLED
BY OTHERS
2.
NOTES:
1.
NO
P.E. SWITCH-2
CC
P.E. SWITCH-1
BK
NC
BK
NC
BK
NO
5.
3.
4.
4.
4.
RED
NEUT.
W
BK
G
R
RED
24V
BL
Y
R
BK
NEUT.
RED
G
W
RED
24V
BL
Y
1
24V
3
2
4
RED RED
G
W
BK
R
24VNEUT.
BK
BOARD
ECM
ECM
BOARD
MOTOR
RELAY
ECM
BOARD
}
Fan-powered Control Box w/ ECM with Electronic or DDC Controls
(Depending on the size of the unit, the ECM board may or may not be located
in the fan control box.)
OR FROM HEATER TERMINAL
LINE VOLTAGE
Fan-powered Control Box with Pneumatic Controls
LINE VOLTAGE
OR FROM HEATER TERMINAL
DUCT PRESSURE MAIN CONTROL
CORRECTION
PRESSURE
SWITCH
DUCT
C
NC
TRANSFORMER
BK
24V
Y
BL
CHOKE
BL
NO
BL
DISCONNECT
BK
SWITCH
3.
FUSE
FAC TOR
POWER
W
BK
W
SCREW
2.
GROUND
GREEN
GR
TERMINAL
BK
BLOCK
MOTOR
FAN
Fan-powered Control Box w/ ECM with Pneumatic Controls
Duct Pressure Switch Option
P.E. SWITCH
DISCONNECT
SWITCH
C
FUSE
NC
CORRECTION CHOKE
TRANSFORMER
NO
BK
BL
Y
24V
BK
POWER FACTOR
BLOCK
2.
W
BK
W
FAN
MOTOR
TERMINAL
GR
GREEN
GROUND
SCREW
BK
5.
CORRECTION CHOKE
POWER FACTOR
FAN CONTROL BOX
TRANSFORMER
BK
W
DISCONNECT
FUSE
3.
W
2.
SWITCH
3.
24V
BL
Y
BLOCK
TERMINAL
OR FROM HEATER TERMINAL
GR
L1
GROUND
SCREW
GREEN
N
LINE VOLTAGE
BK
W
MOTOR
FAN
CONTROLLER
TO VAV
Y
BK
FAN CONTROL BOX
FAN CONTROL BOX
CAPACITORS BEFORE SERVICING.
DISCHARGE MOTOR START/RUN
FAILURE TO DISCONNECT POWER
BEFORE SERVICING CAN CAUSE
SEVERE PERSONAL INJURY OR DEATH.
UNIT TERMINALS ARE NOT DESIGNED
TO ACCEPT OTHER TYPES OF
FAILURE TO DO SO MAY CAUSE
DAMAGE TO THE EQUIPMENT.
USE COPPER CONDUCTORS ONLY!
CONDUCTORS.
SERVICING.
REMOTE DISCONNECTS BEFORE
HAZARDOUS VOLTAGE!
DISCONNECT, LOCK OUT AND TAG
ALL ELECTRIC POWER INCLUDING
CAUTION
CAUTION
WARNING
WARNING
}
}
}