Trane VariTrane VAV Series Installation & Operator's Manual page 49

Figure 21 – Fan-Powered Units (Electronic or DDC/UCM)
FAN-POWERED UNITS - ELECTRONIC OR DDC/UCM -
HEATER TERMINALS - TYPICAL OF SINGLE PHASE VOLTAGES
FAN-POWERED UNITS - ELECTRONIC OR DDC/UCM -
HEATER TERMINALS - TYPICAL OF THREE PHASE VOLTAGES
Notes:
1.
2. Actual heater wiring diagrams are supplied
with each unit (2-stage shown).
3. Load carrying P.E. Switches or Contactors
are supplied depending upon amp drawn.
4. Auto Reset Thermal Cutout and Manual Reset
Cutout are provided as standard.
5. Heater Line Fuses, Airflow Switch, and Door
Interlocking Disconnect are optional.
VAV-SVN01E-EN
Wiring
Diagrams
SINGLE
PHASE
LINE
STAGES
VOLTAGES
1
208
2
240
277
347
480
HEATER
CONTACTORS
Magnetic Contactors (MAGN)
Mercury Contactors (MERC)
THREE
PHASE
STAGES
LINE
1
VOLTAGES
2
208
480
575
HEATER
CONTACTORS
Magnetic Contactors (MAGN)
Mercury Contactors (MERC)
FACTORY INSTALLED
FIELD INSTALLED
OPTIONAL
Contactor
1st Stage
Contactor
2nd Stage
Optional
Air Flow
Switch
Contactor
1st Stage
Contactor
2nd Stage
Optional
Auto Reset Air Flow
Thermal Cutout Switch
Line Voltage
(See Nameplate)
L1 L2 N - 208, 240, 480
L1 N - 277, 347
L1 L2 N
TB4
L1 L2
Optional
Manual Reset
Cutout Fuse
Auto Reset
Thermal Cutout
L1 L2 N
G
Optional
Door
Disconnect
Switch
24V Input from
115 or 277V
Output to Motor
Controller
Line Voltage L1 L2 L3 N - 208,480,600
(See Nameplate)
L1 L2 L3 N
TB4
L1 L2 L3 N
Manual Reset Optional
Cutout
Fuse
L1 L2 L3 N
Optional
Door
Disconnect
Switch
24V Input from 115 or 277V
Output to Motor
Controller
G
N
G
G
49