Trane VariTrane VAV Series Installation & Operator's Manual page 50

Figure 22 – Fan-Powered Units (Pneumatic Controls)
FAN-POWERED UNITS - PNEUMATIC CONTROL -
HEATER TERMINAL - TYPICAL OF SINGLE PHASE VOLTAGES
SINGLE
PHASE
LINE
VOLTAGES
STAGES
208
1
240
2
277
3
347
480
HEATER
CONTACTORS
P.E. with Magnetic Contactors (PEMA)
P.E. with Mercury Contactors (PEME)
FAN-POWERED UNITS - PNEUMATIC CONTROL -
HEATER TERMINAL - TYPICAL OF THREE PHASE VOLTAGES
THREE
PHASE
STAGES
LINE
1
VOLTAGES
2
208
3
480
575
HEATER
CONTACTORS
P.E. with Magnetic Contactors (PEMA)
P.E. with Mercury Contactors (PEME)
NOTE:
FACTORY INSTALLED
1.
FIELD INSTALLED
OPTIONAL
2. Actual heater wiring diagram is supplied
with each unit (1 and 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 provided as standard.
5. Heater Line Fuses, Door Interlocking
Disconnect, and Airflow Switch are optional.
50
Wiring
Diagrams
Manual Reset
PE Switch
1st Stage
Auto Reset
Thermal Cutout
Optional
Air Flow
Switch
PE Switch
1st Stage
P.E. Switch
2nd Stage
Optional
Auto Reset
Air Flow
Thermal Cutout
Switch
Line Voltage
(See Nameplate)
Cutout
Optional
Contactors
115 to 277V
Output to Motor
Line Voltage
(See Nameplate)
Manual Reset Optional
Contactors Cutout
115 to 277V
Output to Motor
L1 L2 N - 208, 240, 480
L1 N - 277, 347
L1 L2 N
G
TB4
L1 L2 N
Fuse
L1 L2 N
G
Optional
Door
Disconnect
Switch
L1 L2 L3 N - 208, 480, 575
L1 L2 L3 N
G
Fuse
L1 L2 L3 N
TB4
L1 L2 L3 N
G
N
Optional
Door
Disconnect
Switch
VAV-SVN01E-EN