
HZ221 TrueZONE
HEAT
COOL
FAN
PURGE
HZ221
ZONE 1
ZONE 2
EM HEAT
Zone Panel Professional Installation Guide

Installation Guide
TABLE OF CONTENTS
Specifications and Accessories .................................................................................................................................. 1
Installation .............................................................................................................................................................................. 2
Wiring ........................................................................................................................................................................................ 3
Operation ................................................................................................................................................................................. 5
Warranty ................................................................................................................................................................................... 6
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HZ221 TrueZONE
SPECIFICATIONS AND ACCESSORIES
Input Ratings:
Voltage: 1830 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:
1820-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.
8-1/8
(206)
RECOMMENDED THERMOSTATS, DAMPERS, AND
ACCESSORIES
The following are suggested thermostats, dampers, and
accessories for use with the TrueZONE panel.
Table 1. Recommended Thermostats.
Compatible thermostats*
TH4210U2002 (Programmable or non-programmable)
TH6210U2001 (Programmable or non-programmable)
TH6220U2000 (Programmable or non-programmable)
TH6320U2008 (Programmable or non-programmable)
TH6220WF2006 (WiFi)
TH6320WF2003 (WiFi)
TH8321WF1001 (WiFi)
THX321WFS2001W (WiFi)
* Note: The HZ221 supports a heat pump with either a
heat or cool reversing valve, but the thermostats MUST
be configured for a heat pump with cool reversing valve
to correctly communicate to the zone panel.
Table 2. Recommended Dampers.
Type Damper Round Rectangular
Zone Spring-open/
ARD ZD
power-closed
Zone Power-open/
MARD/RRD
power-closed
Bypass Static pres-
CPRD
sure regulating
damper
8 (203)
1-55/64
(47)
HZ221 TrueZONE panel dimensions in in. (mm).
1 69-2200—03
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 addi-
tional dampers.
Maximum dampers per panel is limited by transformer
size.
Ensure 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
DATS C7735A1000*
Temperature
Sensor (DATS)*
SDCR Slave Damper Control Relay
* Included in HZ221K kit.