7
Knock-out hole
13. Loosen the screw to remove the inspection window cover in the rear of the heater.
14. Run the electrical power supply cable in conduit.
15. Secure the conduit to the back plate via the knock-out hole.
16. Make the connections properly with connectors which are suitable for the conductor size, in
cluding grounding wirings.
Pull all the conductors from the conduit. Strip 3/4 inch of insulation from ground conductors. Make
a right angle bend in the green(green/yellow) pigtail and place its stripped end next to the stripped
ends of the other green(green/yellow) supply cable. Make sure that the bare ends are tight
together and square. Using lineman's pliers, twist the bare ends tightly together in a clockwise
direction, then screw one of the wire nuts tightly on the spliced conductors. Check to be sure that
no bare copper shows from beneath the wire nut.
17. For the rest of the supply cable, strip 0.4inch (10mm) of the isulation.
18. Identify the supply cables’ phase and insert into respective L1, L2, L3 terminal. Secure the hex
nuts.
19. And after making the connections, arrange the pigtail leads of unit and power supply wires in the
wiring compartment.
20. Replace the wiring cover and lock in place with the screw.
21. Consult NEC code for other types of approved electrical wire splices & wire connectors.
Single and 3 phase connection:
1. This heater is capable to connect with single phase or 3 phase power.
2. Check the power source and use the correct wiring for connection.
3. The heater is factory wired with single phase, if your power source is single phase, it will be OK
that you start make supply connections.
4. Open the access window.
5. Connect the 2 supply cords to L1 and L3.
6. Replace the cover and lock in place with the screw.
7. For a 3 phase connection, wiring has to modify.
8. Open the access window. Look for the internal wires which mark T and W.
9. Unplug T and plug to the Terminal T1 position.
10. Unplug W and plug to the Terminal W position.
11. Now the heater is of 3 phase wiring.
12. Check the power source is a 3 phase supply.
13. Connect the supply cords to L1, L2, L3.
14. Replace the cover and lock in place with the screw.
