Crestron Horizon HZ-THSTAT User manual

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HZ-THSTAT
Horizon® Wireless Thermostat
Product Manual
Crestron Electronics, Inc.

Original Instructions
The U.S. English version of this document is the original instructions.
All other languages are a translation of the original instructions.
Regulatory Model: M201911001
Crestron product development software is licensed to Crestron dealers and Crestron Service Providers (CSPs) under a
limited nonexclusive, nontransferable Software Development Tools License Agreement. Crestron product operating
system software is licensed to Crestron dealers, CSPs, and end-users under a separate End-User License Agreement.
Both of these Agreements can be found on the Crestron website at www.crestron.com/legal/software_license_
agreement.
The product warranty can be found at www.crestron.com/warranty.
The specific patents that cover Crestron products are listed at www.crestron.com/legal/patents.
Certain Crestron products contain open source software. For specific information, visit www.crestron.com/opensource.
Crestron, the Crestron logo, Crestron Home, Crestron Toolbox, and Horizon are either trademarks or registered
trademarks of Crestron Electronics, Inc. in the United States and/or other countries. Wi-Fi is either a trademark or
registered trademark of Wi-Fi Alliance in the United States and/or other countries. Other trademarks, registered
trademarks, and trade names may be used in this document to refer to either the entities claiming the marks and names
or their products. Crestron disclaims any proprietary interest in the marks and names of others. Crestron is not
responsible for errors in typography or photography. Other trademarks, registered trademarks, and trade names may be
used in this document to refer to either the entities claiming the marks and names or their products. Crestron disclaims
any proprietary interest in the marks and names of others. Crestron is not responsible for errors in typography or
photography.
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©2021 Crestron Electronics, Inc.

Contents
Overview 1
Supported Systems 1
Specifications 2
Dimensions 4
Installation 5
System Connections 6
R CONNECTIONS Switch 8
Thermistor Curve 9
Wiring Diagrams 9
Single Stage Heat-Only System without Common Wire 10
Single Stage Heat/Cool System without Common Wire 11
Single Stage Heat/Cool System 12
Single Stage Heat Pump with Aux Heat 13
2 Stage Heat Pump with 2 Stage Aux Heat 14
Dual Stage Heat/Cool System with Separate References and Humidification 15
Wiring a Local Power Source 16
Radiant Floor Only (Floor Warming and/or Space Heating) 17
2 Stage Heat (Stage 1 Radiant Floor)/1 Stage Cool or 1 Stage Heat/1 Stage cool
with Floor Warming 18
2 Stage Heat (Stage 1 Radiant Floor)/1 Stage Cool Heat Pump with 1 Stage Aux
Heat or 1 Stage Heat/1 Stage Cool Heat Pump with 1 Stage Aux Heat and Floor
Warming 19
3 Stage Heat (Stage 1 Radiant Floor)/2 Stage Cool Heat Pump with 1 Stage Aux
Heat or 2 Stage Heat/2 Stage Cool Heat Pump with 1 Stage Aux Heat and Floor
Warming 20
Remote Thermostat Setup 21
Thermostat Operation 22
Lightbar and Up/Down Buttons 24
Weather 25
Side Menu 26
Brightness Slider, Settings, and Installer Settings 28
Display 30
Wireless Network 32
Installer Settings 33
Product Manual 34
System Configuration 34
End User Access 35
Product Manual — Doc. 8622B Contents • i

Display 35
Wireless Network 35
Location 36
Diagnostics 37
About 38
Reboot 38
Restore Device 39
System Setup 40
SystemType Definitions 40
Radiant Floor Heating Definitions 40
Heat/Cool, 1 or 2 Stages, Forced Air or Radiant 43
System Type 43
System Performance 44
User Controls 46
Sensor Setup 49
Humidistat Setup 52
Heat Pump, 1 or 2 Stages, Aux Heat or Dual Fuel 54
System Type 54
System Performance 55
User Controls 57
Sensor Setup 60
Humidistat Setup 63
Radiant Floor Only (Floor Warming) 65
Radiant Floor 65
System Type 66
User Controls 67
Sensor Setup 68
Humidistat Setup 71
Radiant Floor Only (Space Heating) 73
Radiant Floor 73
System Type 74
User Controls 75
Sensor Setup 76
Humidistat Setup 79
Radiant Floor Only (Floor Warming/Space Heating) 81
Radiant Floor 81
System Type 82
User Controls 83
Sensor Setup 84
Humidistat Setup 87
2 Stage Heat (Stage 1 Radiant Floor)/1 Stage Cool 89
Radiant Floor 89
System Type 90
ii • Contents Product Manual — Doc. 8622B

System Performance 91
User Controls 93
Sensor Setup 96
Humidstat Setup 99
2 Stage Heat (Stage 1 Radiant Floor)/1 Stage Cool Heat Pump with 1 Stage Aux
Heat 101
Radiant Floor 101
System Type 102
SystemPerformance 103
User Controls 105
Sensor Setup 108
Humidistat Setup 111
2 Stage Heat (Stage 1 Radiant Floor Warming/Space Heating)/1 Stage Cool 113
Radiant Floor 113
System Type 114
System Performance 115
User Controls 117
Sensor Setup 120
Humidistat Setup 123
2 Stage Heat (Stage 1 Radiant Floor Warming/Space Heating)/1 Stage Cool Heat
Pump with 1 Stage Aux Heat 125
Radiant Floor 125
System Type 126
System Performance 127
User Controls 129
Sensor Setup 132
Humidistat Setup 135
Product Manual — Doc. 8622B Contents • iii

iv • Contents Product Manual — Doc. 8622B
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Product Manual — Doc. 8622B HZ-THSTAT • 1
Overview
The Crestron® HZ-THSTAT is a versatile, wall-mounted heating and cooling thermostat with
integrated humidistat capable of controlling two stage heat/cool systems, two stage heat pump
systems with two auxiliary heat stages, floor warming systems, and humidity systems. A Wi-Fi®
thermostat, the HZ-THSTAT delivers enhanced functionality when combined with a complete
Crestron automation system.
The 3.5 in. LCD touchscreen display is used to configure the system type, radiant floor, system
performance, sensor setup, and thermostat control settings.
Integrated proximity and ambient light sensors ensure the thermostat display looks perfect in
any room lighting condition. The RGB backlit status light bar indicates HVAC calls. The
thermostat behavior can be customized separately for day and night operating modes.
With Crestron Toolbox® software, the thermostat can be configured and debugged remotely,
and the thermostat configurations can be saved and accessed for reference. Detailed system
logging offers the opportunity to diagnose HVAC, sensor, or network issues. Several HZ-THSTAT
thermostats can be configured simultaneously or one at a time.
When the HZ-THSTAT is paired with the HZA-CONV-THSTAT-2WIRE Common Wire Adapter
accessory (sold separately), the thermostat can be used in installations without a common wire.
The HZ-THSTAT has local temperature and humidity sensors and accommodates up to four
remote temperature sensors (CHV-RTS, CHV-RSS, CHVI-RTS-1G-N-W, and
CHVI-RTS-1G-SM-W, sold separately) and up to two remote temperature/humidity sensors
(CHV-RTHS, sold separately) for optimized performance and flexibility. The HZ-THSTAT is also
compatible with 10k thermistors.
Supported Systems
The HZ-THSTAT can control the following heating and cooling systems with or without Humidity
control:
l1 or 2-stage heat
l1 or 2-stage cool
l1 or 2-stage heat, 1 or 2-stage cool
l1 or 2-stage heat pump with 1 or 2 stage auxiliary heat
l1 or 2-stage dual fuel heat pump with 1 or 2 stage auxiliary heat
lRadiant floor only (floor warming and or space heating)
l1 or 2 stage heat (stage 1 radiant floor with or without floor warming), 1 or 2 stage cool
l1, 2, or 3 stage heat (stage 1 radiant floor with or without floor warming), 1 or 2 stage cool
heat pump with 1 stage aux heat

2 • HZ-THSTAT Product Manual — Doc. 8622B
l1, 2, or 3 stage heat (stage 1 radiant floor with or without floor warming), 1 or 2 stage cool
dual fuel heat pump with 1 stage aux heat
NOTES:
l2-stage heating: Unlike traditional furnaces that turn on and run at full capacity with
each demand for heating, 2-stage heat operates like two separate furnaces to maintain
a more consistent temperature in the home. The unit starts out running in its first stage,
and operates at a fraction of its heating capacity. This reduced capacity is sufficient to
warm the home on mild winter days. But when the temperature outside goes very low,
the furnace adjusts to full capacity (second stage) to meet the demand for heat within
the home.
l2-stage cooling: In warm weather, the first stage of the cooling equipment operates at a
fraction of the total cooling capacity. On very hot days, the second stage of the cooling
equipment energizes, and the cooling system operates at full capacity.
Specifications
Specification Details
Measurement Range (Supplied by Remote Sensor)
Indoor Temperature 32° to 110°F (0° to 43°C)
Outdoor Temperature -40° to 170°F (-40° to 77°C)
NOTE: Outdoor temperature measurement is
-30° to 120°F (-34° to 49°C) if thermistor
sensors are used.
Humidity 0% to 100% RH
Temperature Tolerance
±1ºF (±0.5ºC)
Humidity Tolerance
± 5.0% RH
Setpoint Range
Auto 38° to 99°F (3° to 37°C)
Heat 38° to 89°F (3° to 32°C)
Cool 38° to 99°F (3° to 37°C)
Power Requirements
Power Consumption 3 W @ 24VAC
Max Current per Relay 1A
Max current Across All Relays 3A

Product Manual — Doc. 8622B HZ-THSTAT • 3
Specification Details
Communications
WiFi® communications 802.11/b/g/n (2.4 GHz)
Buttons
Up Raises the room’s setpoint by 1ºF, 1ºC, or 0.5ºC,
depending on the active temperature scale
Down Lowers the room’s setpoint by 1ºF, 1ºC, or 0.5ºC,
depending on the active temperature scale
Display
Type Transflective LCD, backlit
Size 3.5 in. (89 mm)
Resolution 320 x 480
Sensors
Ambient Light Determines Day and Night mode, and sets auto-
dimming range for display and LED backlight
Backlight intensity is user adjustable
Proximity Day: More sensitive
Night: Less sensitive
Environmental
Temperature 32° to 104°F (0° to 40°C)
Humidity 10% to 95% RH (non-condensing)
Construction
Housing Plastic, surface-mountable to the front of a
horizontally-oriented 1-gang electrical box
Surface Mounting Mountable to dry wall with two anchors
(included)
Cutout template provided
Electrical Box Mounting Mountable to a horizontal US-style, 1-gang new
or old work electrical box with two mounting
screws (included)
Mounting Depth 1.50 in. (38 mm)
Dimensions
Height 3.52 in. (89 mm)
Width 4.90 in. (124 mm)
Depth 1.76 in. (45 mm) overall, 0.57 in. (14 mm) from
wall surface when installed
Weight
7.81 oz (221 g)

4 • HZ-THSTAT Product Manual — Doc. 8622B
Dimensions

Product Manual — Doc. 8622B HZ-THSTAT • 5
Installation
NOTE: Installers should have a strong working knowledge of HVAC systems.
The thermostat can be mounted directly to drywall, a low voltage mounting bracket (not
included), or to an electrical box (not included) for new or old work applications.
For mounting and installation instructions, refer to the HZ-THSTAT Quick Start.

6 • HZ-THSTAT Product Manual — Doc. 8622B
System Connections
Use the connections on the backplate to wire the thermostat to the HVAC system.
Connections and Controls Description
C (1) Common from HVAC system 24VAC transformer. Used to power the device.
RH (1) Reference for heat calls (W/W2) when using two separate reference connections.
Used to power the device.
R/RC (1) Reference for compressor/cooling/fan calls (Y/Y2/G/O/B). For single reference
systems where the Reference Connections switch is set to R/RC ONLY, R/RC is also the
reference for heat calls (W/W2). R/RC is also used to power the thermostat.
W (1) Heat stage call. Energized to R/RC during a call for stage 1 heat (stage 2 heat when
Radiant Floor is set to Space Heating) or aux heat 1 when Reference Connections switch
is set to R/RC ONLY. If the Reference Connections switch is set to SEPARATE, W is
energized to RH instead of R/RC ONLY.
W2 (1) Heat stage 2 call. Energized to R/RC during a call for stage 2 heat, aux heat 2, or
radiant floor when the Reference Connections switch is set to R/RC ONLY. If the
Reference Connections switch is set to SEPARATE, W2 is energized to RH instead of
R/RC ONLY.
Y (1) Compressor stage 1 call. Energized to R/RC during a call for stage 1 compressor when
the Reference Connections switch is set to R/RC ONLY.
Y2 (1) Compressor stage 2 call. Energized to R/RC during a call for stage 2 compressor
when the Reference Connections switch is set to R/RC ONLY.
O (1) Changeover, active in cool mode. Energized to R/RC during cooling modes when the
Reference Connections switch is set to R/RC ONLY.
B (1) Changeover, active in non-cool modes. Energized to R/RC during non-cooling calls
when the Reference Connections switch is set to R/RC ONLY.
G (1) Fan call. Energized to R/RC during a fan call when the Reference Connections switch
is set to R/RC ONLY.
HUM (1) Humidistat call. Energized to HUMR during a humidity call.
HUMR (1) Reference, humidistat calls.
TS1+ and
TS1- (2) From remote temperature sensor (CHV-RTS, CHVI-RTS-1G-N-W, and CHVI-RTS-1G-SM-W), remote slab sensor (CHV-RSS), or remote temperature and
humidity sensor (CHV-RTHS). Remote sensors sold separately.
TS2+ and
TS2- (2) From remote temperature sensor (CHV-RTS, CHVI-RTS-1G-N-W, and CHVI-RTS-1G-SM-W), remote slab sensor (CHV-RSS), or remote temperature and
humidity sensor (CHV-RTHS). Remote sensors sold separately.
USB (1) Micro B female, USB 2.0 computer console port for firmware upload, temporary
power, and device configuration.

Product Manual — Doc. 8622B HZ-THSTAT • 7
CAUTION: To avoid a possible short circuit, ensure excess wire is pushed back through the hole
in the backplate.
NOTES:
lThis device is rated for 24VAC operation.
lFor installations without a common wire, the HZA-CONV-THSTAT-2WIRE 2-wire power
adapter (sold separately) may be used. Refer to the Wiring Diagrams (on page9) section
for wiring details.
lA miniature flathead screwdriver (not supplied) may be required to attach thinner
gauged wires to the backplate terminals. Press the terminal release with the flathead
screwdriver while inserting the wires.

8 • HZ-THSTAT Product Manual — Doc. 8622B
R CONNECTIONS Switch
The thermostat pulls power from both R terminals and the C terminal. The position of the R
Connections switch decides which R connection is routed to the heat calls (W/W2).
NOTES:
lWhen using the HZA-CONV-THSTAT-2WIRE, always make connections to the R/RC
terminals and set the switch to R/RC ONLY.
lWhen power is not available from the HVAC system, a separate 24VAC transformer can
be connected between the RH and C terminals to provide power to the thermostat. Set
the R Connections switch to R/RC ONLY to ensure all calls use the R/RC reference.
Before attaching the thermostat, note the position of the R CONNECTIONS switch.
lFor one R connection (24VAC reference), wire to the R/RC terminal and set the switch to
R/RC ONLY.
lFor two R connections (24VAC reference), wire to the R/RC and RH terminals and set the
switch to SEPARATE.
The thermostat pulls power from both R connections and the C connection. The R Connections
switch dictates which R connection is routed to the heat calls (W/W2). When power is not
available from the HVAC system, a separate 24VAC transformer can be connected between the
RH and C terminals to provide power to the thermostat, and the R Connection must be set to
R/RC ONLY to ensure all calls use the R/RC reference.
NOTE: When using the HZA-CONV-THSTAT-2WIRE, always use R/RC terminal and set the R
Connections switch to R/RC ONLY.

Product Manual — Doc. 8622B HZ-THSTAT • 9
Thermistor Curve
The thermostat is compatible with Crestron remote sensors and 10K thermistors. Refer to the
table for information on the supported thermistor temperature curve.
Temperature k-ohm
-30°F (-34.4°C) 185.42
0°F (-17.8°C) 81.72
40°F (4.4°C) 26.11
80°F (26.7°C) 9.37
90°F (32.2°C) 7.41
110°F (37.8°C) 4.75
120°F (48.9°C) 3.98
Wiring Diagrams
The following diagrams are a sampling of possible wiring solutions and do not represent all
wiring options.
lSingle Stage Heat-Only System without Common Wire (on the next page)
lSingle Stage Heat/Cool System without Common Wire (on page11)
lSingle Stage Heat/Cool System (on page12)
lSingle Stage Heat Pump with Aux Heat (on page13)
lDual Stage Heat/Cool System with Separate References and Humidification (on page15)
lWiring a Local Power Source (on page16)
After wiring the thermostat, plug the wire hole on the back of the thermostat with the included
foam insulation. The insulation prevents drafts and ensures accurate temperature readings.
NOTE: For Radiant Floor, if the Radiant type is Floor Warming, Space Heating, or Floor
Warm/Space Heat, always connect the radiant floor call wire to W2. Space Heating or Floor
Warm/Space Heat will always use the radiant floor as the first stage of heat.

10 • HZ-THSTAT Product Manual — Doc. 8622B
Single Stage Heat-Only System without Common
Wire
NOTE: This wiring is also applicable for a Radiant Floor Only (Floor Warming and/or Space
Heating) system without Common Wire.

Product Manual — Doc. 8622B HZ-THSTAT • 11
Single Stage Heat/Cool System without Common
Wire

12 • HZ-THSTAT Product Manual — Doc. 8622B
Single Stage Heat/Cool System

Product Manual — Doc. 8622B HZ-THSTAT • 13
Single Stage Heat Pump with Aux Heat

14 • HZ-THSTAT Product Manual — Doc. 8622B
2 Stage Heat Pump with 2 Stage Aux Heat