| Voltage | 24V |
| Application | Zoning |
| Stages | 2 Heat/2 Cool |
| Number of Zones | 3 Zone |
| LEDs | Yes |
| Auto Changeover | Yes |
| Heat Pump Compatible | Yes |
| Compatible with Sensor | Discharge Air Temperature Sensor |
| Emergency Heat Switch | Yes |
| Resettable Fuse | Yes |
| Individual Zone Fan Control | Yes |
Description
The HZ322 is a TrueZONE forced-air zone panel from Resideo (Honeywell Home) — 3 Zone, 2 Heat/2 Cool.
Zoning is what you do when one thermostat cannot describe the whole house. The panel takes a call from each zone thermostat, opens that zone’s dampers, closes the others and runs the equipment at the stage the call needs — so the finished attic and the north bedroom stop fighting each other through a single stat in the hallway.
Two numbers decide which panel. Zones is how many separately controlled areas it handles — this one is rated for 3 Zone. Stages is how much of the equipment it can drive: 2 Heat/2 Cool. A panel with enough zones but not enough stages will run a two-stage furnace as though it were single-stage, and the equipment loses the efficiency that was paid for.
Heat pump compatible, with an emergency heat switch and automatic changeover. A zone panel that cannot handle a heat pump properly is the one that ends up running auxiliary strip heat when it should not.
Individual zone fan control lets one zone run its fan without calling the others — useful where a room needs circulation rather than heat.
It works with a discharge air temperature sensor, which is the part that protects the equipment when a single small zone calls: the panel watches supply temperature and backs the equipment down before the heat exchanger overheats or the coil freezes.
This is the panel on its own. A working installation also needs a 24 V transformer sized for the panel and the dampers, and a discharge air sensor — the kit version of this part number includes both.
Count the dampers before sizing the transformer. Every actuator adds to the load, and the intermittent faults in a zoning system are usually a transformer running at its limit rather than the panel.
- Brand: Resideo (Honeywell Home)
- Manufacturer Part #: HZ322/U
- Type: TrueZONE forced-air zone panel
- Zones: 3 Zone
- Stages: 2 Heat/2 Cool
- Voltage: 24 V
- Heat pump compatible: Yes
- Auto changeover: Yes
- Emergency heat switch: Yes
- Individual zone fan control: Yes
- Resettable fuse: Yes
- UPC: 085267297967
- Category: Forced Air Zone Panels