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VAV-SVN01E-EN
Wiring
Diagrams
Figure 20 – Single-Duct Units (Pneumatic Controls)
NOTE:
1.
3.
Load carrying P.E. Switches or Contactors
are supplied depending upon amp drawn.
and Manual Reset Cutout provided as standard.
Air Flow Switch, Auto Reset Thermal Cutout
4.
Disconnect are optional.
Heater Line Fuses and Door Interlocking
5.
Manual Reset
Cutout
Fuse
Optional
G
TB4
L1
N
Line Voltage
(See Nameplate)
G
SINGLE DUCT UNITS - PNEUMATIC CONTROL -
Switch
Air Flow
STAGES
1
2
3
240
VOLTAGES
208
Auto Reset
Thermal Cutout
P.E. Switch
2nd Stage
3rd Stage
P.E. Switch
PE Switch
1st Stage
HEATER TERMINAL - TYPICAL OF SINGLE PHASE VOLTAGES
277
347
480
LINE
CONTACTORS
HEATER
P.E. with Magnetic Contactors (PEMA)
P.E. with Mercury Contactors (PEME)
N
L2L1 L3
G
Line Voltage
(See Nameplate)
G
N
HEATER TERMINAL - TYPICAL OF THREE PHASE VOLTAGES
SINGLE DUCT UNITS - PNEUMATIC CONTROL -
Door
Optional
Switch
Disconnect
Switch
Disconnect
Door
Optional
L1
N
with each unit (3-stage shown).
Actual heater wiring diagram is supplied
2.
FACTORY INSTALLED
FIELD INSTALLED
OPTIONAL
HEATER
CONTACTORS
P.E. with Magnetic Contactors (PEMA)
P.E. with Mercury Contactors (PEME)
2
3
480
575
208
VOLTAGES
LINE
STAGES
1
PHASE
SINGLE
L1 N - 277, 347
L1 L2 - 208, 240
L1 L2 N - 480
L1 L2 L3 N - 480
L1 L2 L3 - 208, 600
Auto Reset
Thermal Cutout
P.E. Switch
3rd Stage
P.E. Switch
2nd Stage
PE Switch
1st Stage
Switch
Air Flow
Optional
Fuse
Cutout
Manual Reset
TB4
L1
N
L1 L2 L3
L3L2L1
Contactors
Contactors
PHASE
THREE