Wiring
Diagrams
Figure 22 – Fan-Powered Units (Pneumatic Controls)
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| L1 L2 N - 208, 240, 480 | ||
HEATER TERMINAL - TYPICAL OF SINGLE PHASE VOLTAGES |
| Line Voltage |
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| (See Nameplate) | L1 N - 277, 347 | |||
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| L1 L2 | N |
SINGLE |
| Manual Reset |
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| TB4 | G |
PHASE |
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| L1 L2 | N | ||
LINE |
| Cutout | Contactors | Optional |
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VOLTAGES |
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| Fuse |
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STAGES |
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| PE Switch |
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208 | 1 |
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240 | 2 | 1st Stage |
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277 | 3 |
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347 |
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480 |
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HEATER |
| Auto Reset |
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CONTACTORS |
| Thermal Cutout |
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P.E. with Magnetic Contactors (PEMA) | Optional |
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P.E. with Mercury Contactors (PEME) | Air Flow |
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| Switch |
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| L1 | L2 N |
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| G |
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| WHT |
| Optional |
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| BLK |
| Door |
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| Disconnect |
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| Switch |
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115 to 277V Output to Motor
HEATER TERMINAL - TYPICAL OF THREE PHASE VOLTAGES
Line Voltage |
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(See Nameplate) | L1 L2 L3 N - 208, 480, 575 | ||
| L1 L2 L3 N | ||
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| G |
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THREE
PHASESTAGES
LINE1 VOLTAGES
Contactors
Manual Reset | Optional |
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Cutout | Fuse | L1 L2 L3 N |
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| TB4 |
208
2
480
575
3
PE Switch 1st Stage
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
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.
P.E. Switch 2nd Stage
Optional | Auto Reset |
Air Flow | |
Switch | Thermal Cutout |
L1 L2 L3 N
G
N
Optional
Door
Disconnect
Switch
BLK | WHT |
115 to 277V Output to Motor
50 |
