Honeywell HZ221 TrueZone Thermostat
Specifications and accessories
- Input Ratings:
Voltage: 18-30 VAC 50/60 Hz transformer of 40 VA or more. - Current Draw:
Zone Panel: 6.25 VA max.
All VA specifications at 24 VAC. - Wiring:
18–20-gauge solid (not stranded) wire. - Humidity Ratings:
5% to 90% RH non-condensing. - Temperature Ratings:
Shipping: -20° to 150°F (-29° to 66°C)
Operating: -40° to 165°F (-40° to 74°C) - Dimensions:
See below. - Emissions:
Complies with FCC Class B, part 15 requirements.
RECOMMENDED THERMOSTATS, DAMPERS, AND ACCESSORIES
The following are suggested thermostats, dampers, and accessories for use with the TrueZONE panel.
Table 1. Recommended Thermostats.
| System | Non-Programmable | Programmable |
| Heat Pump | TH3210D, TH5220D, TH5320U | TH4210D, TH6220D, TH8220U, TH8321U,
YTH9421C |
Note: These thermostat models all have different four-digit suffixes. All versions of the model numbers listed above will work with the applications they’re listed for.
Table 2. Recommended Dampers.
| Type | Honeywell
Damper |
Round | Rectangular |
| Zone | Spring-open/ power-closed | ARD | ZD |
| Zone | Power-open/ power-closed | MARD/ RRD | For recommended dampers call the Honeywell Zoning Hotline at
1-800-828-8367. |
| Bypass | Static pressure regulating damper | SPRD | SPRD |
Table 3. Maximum Dampers.*
| Ambient Temp. | Maximum Damper VA per Zone |
| 100°F (38°C) | 28.8 |
| 160°F (71°C) | 16.8 |
Use an SDCR (Slave Damper Control Relay) for additional dampers.
Maximum dampers per panel is limited by transformer size.
Ensure the transformer is large enough to power the panel (6.25 VA) and dampers.
Table 4. Accessories.
| Accessory | Description |
| 40 VA transformer* | AT140A1042* |
| 75 VA transformer | AT175A1008 |
| Discharge Air Temperature Sensor (DATS)* | DATS C7735A1000* |
| SDCR | Slave Damper Control Relay |
* Included in HZ221K kit.
Installation
- Mount the HZ221 TrueZONE panel near the HVAC equipment; locate it on a wall, stud, roof truss, or cold-air return.
NOTE: The HZ221 TrueZONE panel can be mounted in any orientation; level it for appearance only. - Separate the zone panel cover from the base, and use the base as a template to drill mounting holes.
Attach the base to the wall, stud, roof truss, or duct with appropriate screws (not included).
Use two screws for attaching to a stud or roof truss, or four screws for duct or drywall/plaster installations.
Wiring must comply with applicable codes, ordinances, and regulations.
CAUTION: Voltage Hazard.
Can cause electrical shock or equipment damage. Disconnect power before beginning installation.
Wire the entire panel before applying transformer power.
Wiring - Install thermostats using the instructions provided with thermostats.
Connect thermostat to zone panel. To connect wire to the panel, strip approximately 1/4 in. of insulation and push the wire into the terminal. To release the wire, press the button on top of the terminal. In retrofit applications, trim end of wire if not straight.
If the thermostat has separate E and Aux terminals, install a jumper between the two terminals.
Wires can be run behind the panel, through wire channels on the panel’s sides, and must be attached to a wiring anchor with a cable tie.
- Install dampers using the instructions provided with dampers. Connect dampers to zone panel.
NOTE: Multiple dampers can be wired in parallel. - Connect DATS as shown.
- Connect the equipment as shown.
The DS/BK terminal is used with a variable-speed fan. Connect to the DS, BK, or ODD terminal on the furnace equipment. When only one zone calls for heat, cool, or fan, the DS/BK terminal operates the fan at low speed to reduce airflow.
- Connect the transformer as shown.
The following diagram is an overall view of the wiring for a heat pump system as depicted in steps 3–7.
The HZ221 TrueZONE panel contains an LED display that communicates the system and zone status. The LEDs indicate the following information.
Table 5. LED Operation.
| Table 5. LED Operation. | |
| LED | Description |
| HEAT | Solid when in heat.
Blinking when DATS temperature exceeds 120°F (49°C) and calling for heat pump only. Blinking when DATS temperature exceeds 160°F (71°C) and calling for heat pump and auxiliary heat. At 150°F (66°C), auxiliary heat is disabled. |
| COOL | Solid when in cool. Blinking when 45°F (7°C) DATS low limit mode has been reached. |
| FAN | Solid when in operation. |
| PURGE | Solid when in purge (lasts 2 minutes at power-up and after a call for heat or cool). Blinking when the DATS sensor has failed, or the wires are shorted or open. Will blink for 3 minutes at power-up if DATS is not present. |
| ZONE 1, 2 | Solid green when open or opening. Solid red when closed or closing.
Blinking amber when there is a damper or thermo- stat short circuit (circuit breaker trip). |
| EM HEAT | Solid when in Em Heat mode. |
Much of this information is also listed on the label on the inside of the HZ221 cover.
When the zone panel cover is off, the EMERGENCY HEAT/PURGE OVERRIDE button is visible.
When the panel is in Purge (at startup or after a call for heat/cool), pressing this button stops the Purge, which saves time during installation or troubleshooting.
All other times, pressing the button puts the zone panel into Em Heat mode so that all calls for heat are handled by the auxiliary heat.
Warranty
Honeywell warrants the products in this catalog (except those parts designated on Honeywell’s price lists as not covered by this warranty) to be free from defects due to workmanship or materials, under normal use and service, for the following warranty periods. Honeywell VisionPRO®, Commercial VisionPROTM, FocusPRO®, PRO 4000, PRO 3000, LineVoltTM PRO, Digital RoundTM, and Modern RoundTM (T87K, N) Series Thermostats with a date code of 0501 or later: sixty (60) months from date of installation. CommercialPRO, PRO 2000 and PRO 1000 thermostats: twenty-four (24) months from date of installation. All other Honeywell thermostats and thermostats with a date code of 0452 or earlier: twelve (12) months from date of installation, unless specified otherwise. Honeywell Air Cleaners, Humidifiers, Ventilators, Ultraviolet Treatment and Zoning Products with a date code of 0501 or later, excluding replacement maintenance parts: sixty (60) months from date of installation. All other Honeywell indoor air quality and zoning products with a date code of 0452 or earlier: twenty-four (24) months from date of installation, unless specified otherwise. Variable frequency drive devices (VFD) and accessories: new products for thirty-six (36) months and factory refurbished drives for twelve (12) months from the date of installation when start-up and commissioning is performed by Honeywell VFD Authorized and trained personnel. All VFD warranty return products must have prior authorization (Form No. 87-0284) and be returned only to the VFD Service Center in Chattanooga, TN. MS, MN and Fact Acting 2-position Direct Coupled Actuators: sixty (60) months from date of installation. The warranty period for all other products is twelve (12) months from date of installation.
If a product is defective due to workmanship or materials, is removed within the applicable warranty period, and is returned to Honeywell in accordance with the procedure described below, Honeywell will, at its option, either repair, replace or credit the customer for the purchase price of the product, in accordance with the procedure described below. This warranty extends only to persons or organizations who purchase products in this catalog for resale.
The expressed warranty above constitutes the entire warranty of Honeywell with respect to the products in this catalog and IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING ANY WARRANTY OF MERCHANTABILITY OR WARRANTY OF FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL HONEYWELL BE RESPONSIBLE FOR ANY CONSEQUENTIAL DAMAGES OF ANY NATURE WHATSOEVER.
Automation and Control Solutions
Honeywell International Inc.
1985 Douglas Drive North Golden Valley, MN 55422
customer.honeywell.com
Automation and Control Solutions Honeywell Limited-Honeywell Limitée 35 Dynamic Drive Toronto, Ontario M1V 4Z9
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Reference
Download Manual:
Honeywell HZ221 TrueZone Thermostat Installation Guide
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