Fan-Powered Units With Ecm - Trane VariTrane VAV Series Installation & Operator's Manual

Figure 24 – Fan-Powered Units with ECM
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.)
LINE VOLTAGE
OR FROM HEATER TERMINAL
4.
L1
N
GR
GREEN
GROUND
SCREW
TERMINAL
BLOCK
DISCONNECT
SWITCH
2.
3.
W
FUSE
3.
TRANSFORMER
POWER FACTOR
CORRECTION CHOKE
FAN CONTROL BOX
WARNING WARNING
HAZARDOUS VOLTAGE!
DISCONNECT, LOCK OUT AND TAG
ALL ELECTRIC POWER INCLUDING
REMOTE DISCONNECTS BEFORE
SERVICING.
DISCHARGE MOTOR START/RUN
CAPACITORS BEFORE SERVICING.
FAILURE TO DISCONNECT POWER
BEFORE SERVICING CAN CAUSE
SEVERE PERSONAL INJURY OR DEATH.
CAUTION CAUTION
USE COPPER CONDUCTORS ONLY!
UNIT TERMINALS ARE NOT DESIGNED
TO ACCEPT OTHER TYPES OF
CONDUCTORS.
FAILURE TO DO SO MAY CAUSE
DAMAGE TO THE EQUIPMENT.
DUCT PRESSURE MAIN CONTROL
5.
BK NO
P.E. SWITCH-1
NOTES:
1.
FACTORY INSTALLED
BY OTHERS
OPTIONAL OR ALTERNATE CIRCUITRY
2.
DISCONNECT SWITCH, FUSE, & SCR ARE LOCATED
EXTERNAL TO CONTROL BOX.
3. FUSE IS OPTIONAL.
4.
DETERMINED BY MOTOR VOLTAGE ON ORDER.
VOLTAGE FOUND ON UNIT NAMEPLATE.
5.
FOR SERIES FAN POWERED TERMINAL UNITS ONLY.
52
Wiring
Diagrams
FAN
MOTOR
BK
Y
NEUT.
RED RED
2
4
ECM
BOARD
1
3
24V
MOTOR
RELAY
}
Y
TO VAV
CONTROLLER
BL
NO
C C
BK
NC NC
P.E. SWITCH-2
BK
Fan-powered Control Box w/ ECM with Pneumatic Controls
Duct Pressure Switch Option
LINE VOLTAGE
OR FROM HEATER TERMINAL
4.
24V
3.
FUSE
5.
NO BL
BL
C
NC
DUCT
PRESSURE
SWITCH
Fan-powered Control Box with Pneumatic Controls
LINE VOLTAGE
4.
OR FROM HEATER TERMINAL
GR
GREEN
GROUND
SCREW
TERMINAL
BLOCK
DISCONNECT
SWITCH
2.
BK
3.
W
FUSE
POWER FACTOR
CORRECTION CHOKE
BK
TRANSFORMER
NO
C
NC
P.E. SWITCH
FAN
MOTOR
GR
GREEN
GROUND
SCREW
TERMINAL
BLOCK
2.
DISCONNECT
SWITCH
W
BL
BK
Y
POWER
NEUT. 24V
FACTOR
CORRECTION
RED RED
CHOKE
Y
ECM
BK BL
BOARD
TRANSFORMER
FAN CONTROL BOX
FAN
MOTOR
BL
Y NEUT. 24V
RED RED
BL
ECM
BOARD
FAN CONTROL BOX
VAV-SVN01E-EN