
Wiring a HZ221 TrueZONE control panel to your HVAC system is manageable when following these steps. First, install the panel near your HVAC equipment on a wall, stud, roof truss, or cold-air return, using the base as a template to drill and secure it. Safety first: disconnect power to the HVAC system before any wiring. Use 18–20-gauge solid wire for connections. Install the recommended thermostat, connecting it to the zone panel by stripping about 1/4 inch of insulation and inserting the wire into the terminals. Next, install dampers following the provided instructions, remembering that you can wire multiple dampers in parallel to the zone panel. Connect the Discharge Air Temperature Sensor (DATS) as shown in the wiring diagram to ensure accurate temperature readings. Then, connect the transformer as indicated, making sure it's the right size to power the panel and dampers (6.25 VA minimum). Finally, refer to the wiring diagram in the Honeywell HZ221 TrueZONE manual for a complete overview, particularly if you have a heat pump system. Following the diagram step-by-step is key for correct wiring and optimal performance.


