Wiring
Diagrams
Figure 19 –
SINGLE DUCT UNITS - ELECTRONIC OR DDC/UCM -
HEATER TERMINALS - TYPICAL OF SINGLE PHASE VOLTAGES
Line Voltage | L1 L2 N - 480 |
(See Nameplate) | L1 L2 - 208, 240 |
| L1 N - 277, 347 |
L1 N
SINGLE |
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PHASE |
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LINE | STAGES | |
VOLTAGES | ||
1 | ||
208 | ||
2 |
2403
277
347
480
HEATER
CONTACTORS
Magnetic Contactors (MAGN)
Mercury Contactors (MERC)
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| TB4 | G |
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| L1 | N |
Contactor | Manual Reset |
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Cutout |
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| Fuse |
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1st Stage |
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Contactor |
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2nd Stage |
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| Fuse |
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| (208, 240, and 480) | ||
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Contactor |
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| Transformer |
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3rd Stage |
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Air Flow | Auto Reset |
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Switch | Thermal Cutout |
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| L1 | N |
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| G |
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| RED | PUR | ORG | BRN | YEL | BLU |
| Door |
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| Disconnect | ||||||||
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| Switch |
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SINGLE DUCT UNITS - ELECTRONIC OR DDC/UCM -
HEATER TERMINALS - TYPICAL OF THREE PHASE VOLTAGES
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| Contactor |
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| 1st Stage |
THREE |
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PHASE |
| STAGES |
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LINE |
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| 1 |
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VOLTAGES |
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2 |
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208 |
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| 3 |
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480 |
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575 |
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| Contactor |
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| HEATER | 2nd Stage |
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| CONTACTORS |
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Magnetic Contactors (MAGN) |
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Mercury Contactors (MERC) |
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Notes: |
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| Contactor |
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| 3rd Stage | |
FACTORY INSTALLED
1.FIELD INSTALLED OPTIONAL
2.Actual heater wiring diagrams are 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 are provided as standard.
5.Heater Line Fuses, Transformers, and Door Interlocking Disconnect are optional.
6.If transformer is not ordered, a separate
power supply is required for operation of unit controls.
24V Input from | 24V Output to | |||||
Controller | Controller | |||||
| Line Voltage | L1 L2 L3 - 208,480,600 | ||||
(See Nameplate) | L1 L2 L3 | |||||
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| TB4 |
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| L1 | L2 | L3 | |
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Manual Reset
CutoutOptional
Fuse
Optional
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| Transformer |
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Auto Reset | Air Flow |
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Thermal Cutout | Switch |
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| L1 | L2 | L3 |
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| G | |||
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| RED | PUR | BRN | ORG | YEL | BLU | Optional |
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| Door |
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| Disconnect |
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| Switch |
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| 24V Input from |
| 24V Output to |
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| Controller |
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| Controller |
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47 |
