Cadet CEH-005PB warranty Wiring Instructions, Branch Circuit Connections Power, Phase Connections

Wiring Instructions

CAUTION: TO AVOID ELECTRICAL SHOCK, BE SURE ELECTRICITY IS TURNED OFF AT ELECTRICAL PANEL BOARD BEFORE WIRING. ALL WIRING MUST BE DONE IN ACCORDANCE WITH LOCAL CODES AND THE HEATER MUST BE GROUNDED AS A PRECAUTION AGAINST POSSIBLE ELECTRIC SHOCK. IN ABSENCE OF LOCAL CODES, FIELD WIRING TO THE UNIT SHALL COMPLY WITH CURRENT PROVI- SIONS OF THE AMERICAN NATIONAL ELECTRICAL CODE OR YOUR NATIONAL ELECTRICAL CODE, AS APPLICABLE.

NOTE: Connect heater only to a line with the voltage and frequency specified on the nameplate.

Branch Circuit Connections (Power)

1.Wiring compartment access door is hinged. To open, turn single screw on the side 1/4 turn (see Figure 8). Do not try to remove screw.

2.A knockout is provided in the back of the unit for field wiring (See Figure 8). This is a multiple diameter knockout. Use the diameter that fits the required conduit size.

3.A ground terminal is provided near the junction block for field wiring. The ground should be connected before any other connections.

4.The junction block is equipped with box terminals sized to accept the correct power supply wire. Wire rated at 600 volts and 75˚C is satisfactory for branch circuit connections. Either copper or aluminum conductors may be used. NOTE: the center box terminal on the three pole junction block is used only for 3-phase operation.

5.Each heater has a wiring diagram on the inside of the access door. Consult this diagram before making any field connections.

BACK

Hinge

Power Control

Access DoorWiring Wiring

Knockout Knockout

Figure 8.

Knockout locations 1/4 Turn Captive Fastener

CAUTION – READ THESE INSTRUCTIONS CAREFULLY WHEN USING ALUMINUM WIRING

1.Carefully strip insulation from aluminum conductors and coat ends of conductors with suitable corrosion inhibitor ("Pentrox A" or equivalent).

2.Wire brush aluminum surface, removing corrosion; re-coat with corrosion inhibitor.

3.Connect aluminum wiring and tighten connection securely. CAUTION: Do not exceed pressure needed for making a typical copper connection.

4.Coat entire connection with inhibitor.

5.All connections using aluminum conductors should be periodically re-checked for tightness.

6.NOTE: DO NOT JOIN ALUMINUM CONDUCTORS DIRECTLY TO COPPER.

DUAL RATED 240/208 VOLT MODELS: All 240 volt models may be operated at 208 volts with a corresponding reduction in output. When the heater is connected to a 208 volt power supply, disconnect the transformer lead from the terminal marked 240V and connect it to the terminal marked 208V. 277 volt units may only be used on single phase circuits. 480 volt units may only be used on three phase circuits.

3-Phase Connections

Single or 3-phase power connections may be used on all 208 and 240/208 volt, 3.3–5 KW models. These units come factory wired for single-phase power but may be wired for 3-phase power by recon- necting two wires. This is done as follows:

1. Models with Line Voltage Control (See Figures 9 & 10)

a.Disconnect the orange wire from the junction block terminal and connect it to the orange wire on the small terminal block and,

b.Disconnect the red wire from the junction block and connect it to the terminal in the center of the block.

2.Models with 24 Volt Control (see Figures 11 & 12)

a.Disconnect the orange wire from the junction block terminal and connect it to the orange wire on the contactor terminal and,

b.Disconnect the red wire from the junction block and connect it to the terminal in the center of the block.

Factory wired for single phase power (line voltage control models).

FRONT

Orange wire

Red wire

Junction block for field wiring

Terminal block

Orange wire

Heater elements

Factory wired for 3-phasesinglepowerphase

power(line voltage(24 controll models))..

FRONT

Orange wire

Red

Contactorwire Red

wire

Junction block forr fieldld wiiring

Terminal block

Orange wire

Heaterr elements

Figure 9. BACK

Figure 11. BACK

Factoryry wired forr 3-phasesinglepowerphase power(line voltage(24 controll models))..

FRONT

Orange Orange wire wire

Red wire

Contactor Red wire

Junction block Junction block for field wiring for field wiring

Terminal Terminal block block

Orange Orange wire wire

Heater

Heater elements elements

Factory wired for 3-phase power (24 volt control models).

FRONT

Orange wire

Contactor Red wire

Junction block for field wiring

Terminal block

Orange wire

Heater elements

Figure 10. BACK

Figure 12. BACK

	NOTE: Supply wires must feed direct from breaker to junction block. Thermostat wires connect to terminal board. See
4	wiring diagrams for your specific model.