Fan-Powered Low-Height Units With Ecm; Wiring Diagrams - Trane VariTrane VAV Series Installation & Operator's Manual

Figure 26 – Fan-Powered Low-Height Units with ECM
Fan-Powered Low-Height 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
4.
FAN
OR FROM HEATER TERMINAL
MOTOR
GR
GREEN
W
GROUND
SCREW
TERMINAL
BLOCK
DISCONNECT
SWITCH
2.
3.
W
FUSE
Y
BL
BK
TRANSFORMER
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
NC
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.
54
Wiring
Diagrams
FAN
MOTOR 2
(SIZE 10 ONLY)
BK
Y
BK
NEUT. 24V
RED RED
2 4
ECM
BOARD
1
3
24V
MOTOR
RELAY
}
TO VAV
CONTROLLER
FAN CONTROL BOX
NO
C C
BK
NC
P.E. SWITCH-2
BK
Fan-Powered Low-Height Control Box w/ ECM with Pneumatic Controls
Duct Pressure Switch Option
LINE VOLTAGE
OR FROM HEATER TERMINAL
DISCONNECT
3.
SWITCH
FUSE
BK
5.
NO
BL
BL
C
NC
DUCT
PRESSURE
SWITCH
BK
TRANSFORMER
Fan-Powered Low-Height Control Box w/ ECM with Pneumatic Controls
4.
LINE VOLTAGE
OR FROM HEATER TERMINAL
GR
GREEN
GROUND
SCREW
TERMINAL
BLOCK
DISCONNECT
SWITCH
2.
3.
W
FUSE
Y
BL
BK
TRANSFORMER
NO
C
NC
P.E. SWITCH
4.
FAN FAN
MOTOR MOTOR 2
(SIZE 10 ONLY)
GR
GREEN
W
GROUND
BK
SCREW
TERMINAL
BLOCK
2.
W
BL
Y
NEUT. 24V
RED RED
Y
ECM
BL
BOARD
FAN CONTROL BOX
FAN FAN
MOTOR MOTOR 2
(SIZE 10 ONLY)
W
BK
BL
BL
Y
NEUT. 24V
RED RED
ECM
BOARD
FAN CONTROL BOX
VAV-SVN01E-EN