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FRONT Terminal block Factory wired forsingle phasepower (linevoltage control models). Heater elements Orangewire Figure 10 Orangewire Junction block for field wiring Red wire BACK 3-Phase Connections Single or 3-phase power connections may be used on 240/208 volt, 5 KW models. These units come factory wired for single-phase power but may be wired for 3-phase power by reconnecting two wires. This is done as follows: Models with Line Voltage Control (See Figures 10 and 11) 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. FRONT Terminal block Wired for Orangewire 3-phase power (line voltage Heater elements control models) Figure 11 Orangewire Junction block for field wiring Red wire BACK NOTE: Supply wires must feed direct from breaker to junction block. Thermostat wires connect to terminal board. See wiring diagram. Control Voltage Wiring 1. A knockout is also provided in the back of the unit for control wiring. This knockout is sized for 1/2” conduit. (See Figure 12) 2. Thermostat wire shall be as follows: a. Line voltage control: Use NEC Class 1, 600V, 90.C, AWG #10 wire with copper conductor or same gauge wire as supply line. 3. Install wall thermostats in accordance with the installation instructions supplied with the thermostat. NOTE: Do not locate thermostat in an area exposed to unusual temperature conditions or poor air circulation. NOTE: Line voltage control model of 5KW rating that is 208 and 240 volt, wired for 3-phase operation, should not be used with a wall thermostat. H1H2P1P2F2F1Figure 12 Thermostat wiring connections ---- Denotes optional equipment BACK FRONT Line VoltageControl Models (Singe Phase): Install jumpers between H1 and H2 and P1 and P2 on 208/240V units (note dashed lines) Heater Elements Control Terminal Board Connect Thermostat Wires To P1 and H1 To Thermostat This model comes factory wired for single phase. When this model is converted in the field to 3-phase, control hookup should be provided by a CEK-TB2 (built-in thermostat). A 2-stage or modulating wall thermostat can be used if hooked up correctly and according to wiring diagram. 4. Connect the thermostat wires to terminals H1 and P1 as shown in Figure 12. On 208 and 240 volt, single-phase model with line voltage control, install jumpers as shown in Figure 12. FRONT Manual Reset Limits Figure 13 Manual reset limit Two manual reset thermal limits are factory installed on all models. The limits are located on the front of the heater. The manual reset limits will not reset until the buttons are pushed and heater has cooled down. Wiring Diagram Wiring Diagram CEH005P NOTE: For single phase only, a single pole thermostat may be used if H1 and H2 are connected with a jumper and P1 and P2 are connected with a jumper. NOTE: For single phase operation, terminal L2 should be left unco...

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