Wiring
Diagrams
Figure 20 – Single-Duct Units (Pneumatic Controls)
SINGLE DUCT UNITS - PNEUMATIC CONTROL - |
|
| Line Voltage | L1 L2 - 208, 240 | ||
HEATER TERMINAL - TYPICAL OF SINGLE PHASE VOLTAGES |
|
| L1 L2 N - 480 | |||
|
| (See Nameplate) | ||||
|
| L1 N - 277, 347 | ||||
|
|
|
|
| ||
|
|
|
|
| L1 | N |
SINGLE |
|
|
|
| TB4 | G |
PHASE |
| Manual Reset |
|
| ||
| Optional | L1 | N | |||
LINE |
| |||||
| Cutout |
|
|
| ||
VOLTAGES | STAGES | Contactors |
| Fuse |
|
|
|
|
|
|
|
| |
208 | 1 |
|
|
|
|
|
240 | 2 |
|
|
|
|
|
277 | 3 |
|
|
|
|
|
347 |
|
|
|
|
|
|
480 |
| PE Switch |
|
|
|
|
|
|
|
|
|
| |
|
| 1st Stage |
|
|
|
|
HEATER |
|
|
|
|
|
|
CONTACTORS |
| Auto Reset | Air Flow |
|
|
|
P.E. with Magnetic Contactors (PEMA) |
|
|
| |||
Thermal Cutout | Switch |
|
|
| ||
P.E. with Mercury Contactors (PEME) |
|
|
| |||
P.E. Switch |
|
|
|
| ||
|
|
|
|
|
| |
|
| 2nd Stage |
|
|
|
|
|
|
|
| L1 | N |
|
|
| P.E. Switch |
|
|
| G |
|
| 3rd Stage |
|
|
|
|
|
|
|
|
| Optional |
|
|
|
|
|
| Door |
|
|
|
|
|
| Disconnect | |
|
|
|
|
| Switch |
|
SINGLE DUCT UNITS - PNEUMATIC CONTROL -
HEATER TERMINAL - TYPICAL OF THREE PHASE VOLTAGES
THREE
PHASESTAGESContactors
LINE1 VOLTAGES
| Line Voltage | L1 L2 L3 - 208, 600 | ||
| L1 L2 L3 N - 480 | |||
| (See Nameplate) | |||
|
|
|
| |
|
| L1 L2 L3 | ||
|
|
|
|
|
|
|
|
|
|
|
|
| G |
|
Manual Reset | Optional |
|
|
|
Cutout | Fuse | L1 L2 L3 | ||
|
| TB4 | ||
208
2
480
575
3
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
3.Load carrying P.E. Switches or Contactors are supplied depending upon amp drawn.
4.Air Flow Switch, Auto Reset Thermal Cutout and Manual Reset Cutout provided as standard.
5.Heater Line Fuses and Door Interlocking Disconnect are optional.
PE Switch 1st Stage
Auto Reset | Air Flow |
Thermal Cutout | Switch |
P.E. Switch 2nd Stage
L1 L2 L3 N
G
N
P.E. Switch 3rd Stage
Optional
Door
Disconnect
Switch
48 |
