All field wiring should conform to NEC and all applicable state and local code require- ments.
The control panel box is always on the end opposite the piping connections. Access the control box by removing the two screws that secure the front cover. If the unit has a terminal unit control board (TUC), remove the screw in the top right corner of the panel. This will allow the panel to pivot downward to provide access to the electrical
components. See Figure 23. Figure 23. The terminal unit control (TUC) board pivots
downward to provide service access.
!WARNING: Insulate all power wire from sheetmetal ground. Failure to do so may cause electrical shorts resulting in personal injury or death.
Units have one of three different connection points, depending on the unit type and options.
1. Power & ground inside of control box:
If the unit has a fan mode switch, Tracer® ZN.010 or ZN.510 control without a disconnect switch, the power leads and capped ground wire are inside the control panel.
2. Power & ground inside the junction box:
If the unit has a TUC control without a disconnect switch, the power leads and capped ground wire are inside the junction box on the control panel.
3.Power wired to switch on junction box & ground inside of junction box:
If the unit has a disconnect switch, the power leads wire to the junction box switch on the control panel. Pull the capped ground wire into the junction box.
34 |
