Sumitomo HC-4A2 Zephyr - Electrical Connections; Mains Power Supply Connection Diagrams; Field Wiring the Compressor

Installation
25
Mains Power Supply Connected to L1-L2 Mains Power Supply Connected to L3-L4
Figure 4 Connections for Mains Power Supply
Field Wire the Compressor
Tools required: #2 Phillips screwdriver
Flat blade screwdriver
(2) Open end wrenches, 33mm (1 5/16”)
The HC-4A Zephyr
®
Series Air-Cooled Compressor is normally furnished with a power cord
attached. However, the compressor can be hard wired to customer’s power source if required.
To hard wire the compressor, first remove the power cord from the compressor.
1. Disconnect the power cord from the customer’s power source.
2. Using two 33 mm wrenches, loosen, but do not remove, the power cord strain relief on the
front panel. Use one wrench to hold the strain relief body and one to turn the nut.
3. Remove the field wiring access cover on the front panel to gain access to the terminal block.
4. With a flat-blade screwdriver, loosen the power cord terminal screws and the ground
connection. Remove the two hot leads and ground.
5. Remove the complete power cord.
Instructions for field wiring follow. Use 12 AWG (3.3 mm
2
) copper wire with oil-resistant
insulation. Two power leads and one grounding conductor are required. Be sure that the
customer’s electrical service conforms to the specifications.
When using 3/4” rigid conduit:
1. Remove the strain relief fitting from the compressor’s front panel.
2. Attach ¾” conduit to the front panel using a connector sized for a 28-mm (1 3/32") hole.
This is the National Electrical Code’s standard size for ¾” (26.7 mm) conduit.