Installation Instructions (S7999D Oi Display) - A.O. Smith 100 Series Service Handbook

6. Approvals:
FCC Part 15, Class A Digital Device
Underwriter's Laboratories, Inc. (UL) (cUL) Component Recognized (for non-continuous operation): File Number MH17367 (MJAT2,
MJAT8).

INSTALLATION INSTRUCTIONS (S7999D OI DISPLAY)

Mounting the S7999D OI Display and Power Supply
The OI Display can be mounted on the door panel of an electrical enclosure.
1. Select the location on the door panel to mount the display; note that the device will extend into the enclosure at least one inch
past the mounting surface.
2. Provide an opening in the panel door 8" wide X 5 1/2" high (for front panel mount) or 7 1/8" wide X 4 11/16" high (for rear panel
mount).
3. Place the OI Display in the opening and use it as a template to mark the location of the four mounting screw holes. Remove
the device.
4. Using pilot holes as guides, drill 1/4 in. holes through the door panel.
5. Place the display in the opening, aligning the mounting holes in the device with the drilled holes in the panel.
6. Secure the display to the panel with four #6-32 screws and nuts provided.
7. Wire the 24VAC power supply and the RS-485 cables.
8. Ensure the 8-pin connector plug is aligned with the header pins when inserting the 8-pin connector plug back onto the Display.
Secure firmly.
9. Please make sure resistive spark cable is used with the display system, and route the wires away from the display as much as
possible.
QUICK SETUP (S7999D OI DISPLAY)
1. Make sure the S7999D 8-pin connector is properly aligned and pressed firmly in place.
2. Make sure the wires between the 8-pin connector and the controller are properly wired and secure.
WARNING: Electrical Shock Hazard. It can cause severe injury, death or equipment damage. Line voltage is present at the 120
VAC power supply.
3. Make sure the power supply is connected securely to the 120 VAC power source.
FIGURE 28. S7999D OI DISPLAY CONNECTOR TERMINALS
Servicing should only be performed by a Qualified Service Agent 45