Table 2 – Electrical Data
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| Power Supply Circuit |
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| Contactor |
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| Holding Coil |
| Motor |
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Model |
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| Line |
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| Volt Amperes |
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| Line | Wire |
| Minimum |
| (Note 3) |
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| Amps | Size | No. | Conduit |
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| kW |
| Volts | Phase | (Note 1) | (Note 2) | Circuits | Size † | Inrush |
| Sealed | Volts | H.P. | Phase |
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| 208 | 3 | 44 | 6 | 2 |
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| 208 |
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30 |
| 240 | 3 | 38 | 8 | 2 | 1 | 104 |
| 18 | 240 | 1/3 | 3 | |
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| 480 | 3 | 37 | 8 | 1 |
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| 480 |
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38.5 |
| 240 | 3 | 48 | 6 | 2 | 104 |
| 18 | 240 | 1/3 | 3 | ||
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39 |
| 480 | 3 | 48 | 6 | 1 | 1 |
| 480 | |||||
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50 |
| 480 | 3 | 31 | 8 | 2 | 1 | 104 |
| 18 | 480 | 1/3 | 3 | |
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1. Includes Fan Motor Amps |
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| † Conduit knockout location – top of Junction Box. |
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2.Use 90°C Wire - Copper conductors only
3.Standard units have two contactors. Units with separate fan motor control use three contactors.
IMPORTANT
Failure to understand and follow these installation instructions and the “WARNING” notes therein may result in serious personal injury from electrical shock, or from the heater falling due to faulty installation.
WARNING: This heater is not intended for use in hazardous atmospheres where flammable vapors, gases, liquids or other combustible atmospheres are present as defined in the National Electrical Code. Failure to comply can result in explosion or fire. For these applications see PDS
WARNING: Hazard of Shock. Disconnect all power before installing heater.
The heater must be mounted at least 7’ above the floor to prevent accidental contact with the heating elements or fan blade which
could cause injury.
The ceiling structure, the brackets, hangers or chains used to sus- pend the heater, and the anchoring provisions must be of sufficient strength to support the total weight of the heater installation (250 pounds for
Prior to operating the heater verify that the fan hub setscrews are tightened and the
On Models connected to
First stage of thermostat must be connected to terminals C1 and C2 to insure proper operation of overheat protective devices.
INSTALLATION
WARNING: Hazard of Shock. Any installation involving electric heaters must be effectively grounded in accordance with the National Electrical Code.
1.Heater should be positioned with junction box facing away from walls to provide easy access for servicing relay(s) mount- ed within.
WARNING: Mount the heater for down discharge only.
2.It is important that 12” minimum dimension shown in Figure 1 be maintained to make it possible for a serviceman to remove the fan motor, if necessary, without moving the heater from its mounting.
WARNING: The heater must be mounted at least 7’ above the floor to prevent accidental contact with the heating elements or fan blade which could cause injury.
The ceiling structure, the brackets, hangers or chains used to sus- pend the heater, and the anchoring provisions must be of sufficient strength to support the total weight of the heater installation (250 pounds for
3.The heater may be mounted to the ceiling by attaching rigid angle brackets, hangers, or chains to the four mounting holes on top of the heater case using four 5/8” bolts (by others). See Figures 1 and 2.
Note: Brackets, hangers, or chains to support the heater are sup- plied by the customer.
4.All wiring should be done in accordance with the National Electrical Code and with local codes by a qualified person as defined in the NEC.
WARNING: Use copper conductors only.
5.
6.Wire heater per wiring diagram supplied with this instruction sheet.
Note: Power relay(s) are provided as standard on all heaters.
WARNING: Prior to operating the heater, verify that the fan hub setscrews are tightened and the push- on clip is secured to assure that the fan blade is securely fastened to the motor shaft.
7.Carefully inspect the completed installation. Rotate the fan blade by hand to be sure that it turns freely. Investigate any binding, rubbing or interference.
WARNING: On Models connected to
8.Air diffusers for deflecting the air are optional. See Instruction Sheet PF449 for installation instructions.
MAINTENANCE
WARNING: Hazard of Shock. Disconnect all power to heater before servicing or replacing heaters. Do not attempt to service heater while unit is operat- ing as there is hazard of electric shock, injury from operating fan, and burns from hot heating ele- ments.
1.Before activating for next heating season, vacuum or use com- pressed air to remove accumulated dust or lint, which other- wise may restrict proper air flow.
2.Periodically check all electrical connections and retighten to avoid electrical wiring difficulties.
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