Crestron CHV-THSTAT Quick start guide

Crestron CHV-TSTAT & CHV-THSTAT
Thermostats
Operations and Installation Guide
Firmware Version v2.061.0018 and Later

This document was prepared and written by the Technical Documentation department at:
Crestron Electronics, Inc.
15 Volvo Drive
Rockleigh, NJ 07647
1-888-CRESTRON
Regulatory Compliance
Federal Communications Commission (FCC) Compliance Statement
This Class B digital apparatus complies with Canadian ICES-003.
Cet appareil numérique de la classe B est conforme à la norme NMB-003 du Canada.
Industry Canada (IC) Compliance Statement
This device complies with part 15 of the FCC Rules. Operation is subject to the following conditions:
(1) This device may not cause harmful interference and (2) this device must accept any interference received,
including interference that may cause undesired operation.
CAUTION: Changes or modifications not expressly approved by the manufacturer responsible for compliance
could void the user’s authority to operate the equipment.
NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device,
pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful
interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy
and, if not installed and used in accordance with the instructions, may cause harmful interference to radio
communications. However, there is no guarantee that interference will not occur in a particular installation. If
this equipment does cause harmful interference to radio or television reception, which can be determined by
turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the
following measures:
Reorient or relocate the receiving antenna
Increase the separation between the equipment and receiver
Connect the equipment into an outlet on a circuit different from that to which the receiver is connected
Consult the dealer or an experienced radio/TV technician for help
As of the date of manufacture, the CHV-TSTAT and CHV-THSTAT has been tested and found to comply with
specifications for CE marking and standards per EMC and Radiocommunications Compliance Labelling.
All brand names, product names and trademarks are the property of their respective owners.
©2010 Crestron Electronics, Inc.

Crestron CHV-TSTAT and CHV-THSTAT Thermostats
Contents
Quick Installation Reference ....................................................................................................iii
Thermostats: CHV-TSTAT and CHV-THSTAT 1
Introduction ............................................................................................................................... 1
Functions and Features ................................................................................................1
Specifications ..............................................................................................................4
Physical Description....................................................................................................5
Setup ..........................................................................................................................................9
Network Wiring...........................................................................................................9
Identity Code ............................................................................................................... 9
System Connections ..................................................................................................10
Wiring Diagrams .....................................................................................................................11
Separately Powered Two Wire Heat Systems (Powered by an Independent
Transformer).............................................................................................................. 12
Single Stage Heat Only Systems ...............................................................................12
Single Stage Heat with Fan Control Systems............................................................ 13
Single Stage Cool Only Systems ...............................................................................13
Single Stage Heat/Cool with Integrated Control Unit Systems ................................. 14
Single Stage Heat/Cool with Separate Systems......................................................... 15
Single Stage Heat Pump Systems..............................................................................16
Two Stage Heat Pump Systems.................................................................................17
Slab 1, Slab 2, and Slab 3 (Floor Warming and/or Space Heating) Systems ............ 18
Slab 4A Two Stage Heat/Single Stage Cool Systems and Slab 5A Floor Warming
with Single Stage Space Heat/Cool Systems............................................................. 19
Slab 4B Two Stage Heat/Single Stage Cool System and Slab 5B Single Stage
Heat/Cool with Floor Warming Systems................................................................... 20
General Humidifier Connections............................................................................... 21
Installation ............................................................................................................................... 22
Thermostat Setup..................................................................................................................... 24
Setup Procedure......................................................................................................... 24
Setup Notes................................................................................................................ 24
System Types and Definitions...................................................................................25
Heat/Cool, 1 or 2 Stages, Forced Air or Radiant ....................................................... 27
Heat Pump, 1 or 2 Stages, Aux Heat or Dual Fuel .................................................... 31
Slab 1 – Floor Warming Only ...................................................................................35
Slab 2 – Single Stage Space Heat with Slab Maximum ............................................39
Slab 3 – Single Stage Heat with Slab Minimum/Maximum...................................... 43
Slab 4A – Two Stage Heat/One Stage Cool with Slab Maximum.............................47
Slab 4B – 2 Stage Heat/1 Stage Cool with Slab Maximum (Heat Pump) ................. 51
Slab 5A – 1 Stage Heat/Cool with Floor Warming ...................................................55
Slab 5B – 1 Stage Heat/Cool with Floor Warming (Heat Pump) .............................. 59
Thermostat Operation ..............................................................................................................63
View Button Menus................................................................................................... 64
Mode Button Menus..................................................................................................65
Programming Software............................................................................................................72
Earliest Version Software Requirements for the PC .................................................72
Operations and Installation Guide – DOC. 8163D Contents •i

Thermostats Crestron CHV-TSTAT and CHV-THSTAT
Programming with Crestron SystemBuilder..............................................................72
Programming with D3 Pro......................................................................................... 72
Programming with SIMPL Windows ........................................................................ 73
Example Program ......................................................................................................74
Uploading and Upgrading........................................................................................................ 75
Establishing Communication..................................................................................... 75
Programs and Firmware ............................................................................................76
Program Checks ........................................................................................................ 76
Problem Solving ......................................................................................................................77
Control System Error Log Message Formats ............................................................77
Local Error Messages ................................................................................................ 78
Troubleshooting.........................................................................................................79
Check Network Wiring..............................................................................................81
Reference Documents................................................................................................ 82
Further Inquiries ........................................................................................................82
Future Updates ..........................................................................................................82
Appendix A: Glossary .............................................................................................................83
Appendix B: About Heat Pumps..............................................................................................85
Return and Warranty Policies .................................................................................................. 86
Merchandise Returns / Repair Service ......................................................................86
CRESTRON Limited Warranty................................................................................. 86
ii •Contents Operations and Installation Guide – DOC. 8163D

Crestron CHV-TSTAT and CHV-THSTAT Thermostats
Quick Installation Reference
1. Select a suitable location and run the connecting wires from the heating/cooling system and the Cresnet system.
Refer to page 7 for a description of the thermostat connectors.
Refer to page 9 for Network wiring details.
Use the appropriate wiring diagram:
• Separately Powered Two Wire Heat Systems
(Powered by an Independent Transformer) (Refer to page 12)
• Single Stage Heat Only (Refer to page 12)
• Single Stage Heat with Fan Control (Refer to page 13)
• Single Stage Cool Only (Refer to page 13)
• Single Stage Heat/Cool with Integrated Control Unit (Refer to page 14)
• Single Stage Heat/Cool with Separate Systems (Refer to page 15)
• Single Stage Heat Pump (Refer to page 16)
• Two Stage Heat Pump (Refer to page 17)
• Slab 1, Slab 2, and Slab 3 (Floor Warming and/or Space Heating) (Refer to page 18)
• Slab 4A Two Stage Heat/Single Stage Cool Systems and Slab 5A Floor Warming with Single Stage
Space Heat/Cool (Refer to page 19)
• Slab 4B Two Stage Heat/Single Stage Cool System and Slab 5B Single Stage Heat/Cool with Floor
Warming (Refer to page 20)
• General Humidifier Connections (Refer to page 21)
2. Separate the thermostat from the backplate to expose the connections and mounting holes.
3. Mount the thermostat backplate (60 inches (1.5 meters) above the finished floor) directly to the wall with wall
anchors (not provided) and screws (not provided) or to a single-gang box (not provided) mounted horizontally,
and connect the wiring. Refer to page 22 for detailed mounting instructions and page 9 for detailed connector
information. If using a five-sided box, fill with insulation material to minimize wall air ingress.
4. Install the thermostat on the backplate (Refer to page 22).
5. Setup the thermostat (Refer to page 24).
Heat/Cool Radiant and Forced Air Systems Setup on page 27.
Heat Pump Systems on page 31.
Slab Systems begin on page 35.
6. Configure the thermostat (Refer to “Thermostat Operation” on page 63).
Operations and Installation Guide – DOC. 8163D Contents •iii

Crestron CHV-TSTAT and CHV-THSTAT Thermostats
Thermostats:
CHV-THSTAT
Thermostats: CHV-TSTAT and
CHV-THSTAT
IntroductionIntroduction
Functions and Features
The CHV-TSTAT and CHV-THSTAT are versatile heating and cooling thermostats
designed for one and two stage control of forced air, radiant, and heat pump HVAC
systems. The CHV-TSTAT provides temperature control, while the CHV-THSTAT
provides temperature control with an integrated humidistat. Relative humidity
capability can be added to the CHV-TSTAT through an external remote humidity
sensor (sold separately).
Although functional as standalone thermostats, the CHV-TSTAT and
CHV-THSTAT deliver greatly enhanced functionality as part of a complete Crestron
Home®automation system. The thermostats are available in six different models:
Models
DESCRIPTION MODEL NUMBER COLOR
CHV-TSTATA Almond
CHV-TSTATB Black
Heating/Cooling Thermostat
CHV-TSTATW White
CHV-THSTATA Almond
CHV-THSTATB Black
Heating/Cooling and
Humidity Thermostat
CHV-THSTATW White
Operations and Installation Guide – DOC. 8163D Thermostats: CHV-TSTAT and CHV-THSTAT •1
• User adjustable temperature and/or humidity control of one and two-stage
heating and cooling systems
• Supports seven slab system configurations
• 128 x 64 Transflective 2.75 inch (70 mm) LCD display
• Fahrenheit or Celsius indication
• Four-front panel buttons for setup, configuring and temperature/humidity
adjustments
• Back light (with each button press) for night viewing
• Supports up to four remote temperature and/or temperature/humidity sensors.
• Operates as a stand-alone device or in a Cresnet®system
• Extended functionality as a Cresnet device for lighting control, alarms, etc.

Thermostats Crestron CHV-TSTAT and CHV-THSTAT
2 •Thermostats: CHV-TSTAT and CHV-THSTAT Operations and Installation Guide – DOC. 8163D
Featuring a large backlit LCD display, the CHV-TSTAT and CHV-THSTAT
thermostats are navigable using four simple pushbuttons which provides easy access
to indoor and outdoor temperature and humidity readings, setpoint adjustments,
system mode and fan status indicators, and setup menus. Climate control features
include separate heating, cooling, and humidity setpoints with optional automatic
changeover between heating and cooling modes. Adjustable anticipators prevent
overshooting the set temperature, and continuous fan operation can be selected when
needed for increased circulation.
Multiple Crestron thermostats may be networked via Cresnet to a PAC2, PAC2M, or
other 2-Series control system, enabling global temperature and humidity adjustment
from any thermostat. Automation functions such as lighting, motorized blinds, or
lawn sprinklers can be accessed through two custom remote function pages, and
customized text messages can be sent to the LCD display to provide maintenance
reminders and other alerts.
Its connection to the control system also enables full control and scheduling of the
CHV-TSTAT/CHV-THSTAT from touchpanels and computers throughout the
home, and supports extensive flexibility for integration with other devices and
systems. In the event that communication with the control system is disrupted for
any reason, the CHV-TSTAT/CHV-THSTAT will remain operable to control the
HVAC system.
Optional remote temperature and humidity sensors can be connected to the
CHV-TSTAT/CHV-THSTAT for enhanced flexibility and optimized performance.
Climate can be regulated according to an average of multiple sensors, or the built-in
sensors can be disabled entirely to allow the CHV-TSTAT/CHV-THSTAT to be
installed out of view. Outdoor climate can also be monitored, enabling outdoor low-
temperature compensation to prevent condensation on windows during cold weather.
The CHV-TSTAT/CHV-THSTAT accepts up to four remote temperature sensors,
two remote temp/humidity sensors, or a combination of one temp/humidity and two
temperature sensors.
Firmware Versions
The new features, and consequent changes to the SIMPL Windows symbol
programming, for firmware version 2.0 and later make it incompatible for use with
X-generation control processors. In addition, upgrading to release 2.0 and later from
a previous release will require a complete re-programming of the thermostat.
Remote Sensors
Firmware version 2.0 and later supports up to four optional remote sensors, two for
each input channel: temperature only (CHV-RTS), temperature/humidity
(CHV-RTHS), and slab sensor (CHV-RSS) for both thermostats. Information from
two sensors that share an input channel is averaged together in the
temperature/humidity calculations.
Outdoor conditions, -40º to 170º F (-40º to 77º C), can be imported from the
CHV-RSS slab sensor.
For additional information about the sensors, refer to the latest revision of the
CHV-RTS & CHV-RTHS Installation Guide (Doc. 8189), and the CHV-RSS
Installation Guide (Doc.6229) which are available from the Crestron®website
(www.crestron.com).

Crestron CHV-TSTAT and CHV-THSTAT Thermostats
Operations and Installation Guide – DOC. 8163D Thermostats: CHV-TSTAT and CHV-THSTAT •3
Heating and Cooling Systems
The CHV-TSTAT and CHV-THSTAT can control the following heating and cooling
systems:
• One stage heat
• One stage heat, one stage cool
• One stage heat, one stage cool (heat pump with auxiliary heat)
• Two stage heat
• Two stage heat, one stage cool
• One stage heat, two stage cool
• Two stage heat, two stage cool
• Two stage heat, two stage cool (heat pump with auxiliary heat)
• Wide range cool option suitable for wine cellars or other chilling processes*
• Slab settings for heating and floor warming systems*
NOTE: Two Stage Heating – Unlike traditional furnaces that turn on and run at full
capacity with each demand for heating, two-stage heat operates like two separate
furnaces to maintain more consistent comfort in your 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 your 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.
Two 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.
*Firmware version 2.0 or higher.

Thermostats Crestron CHV-TSTAT and CHV-THSTAT
4 •Thermostats: CHV-TSTAT and CHV-THSTAT Operations and Installation Guide – DOC. 8163D
Specifications
The following table provides a summary of specifications for the CHV-TSTAT and
CHV-THSTAT.
CHV-TSTAT and CHV-THSTAT Specifications
SPECIFICATION DETAILS
Measurement Range
Indoor Temperature 0° to 110°F (-18° to 43°C)
Outdoor Temperature -40º to 170º F (-40º to 77º C)1
Humidity 0% to 100% RH1,2
Setpoint Range
Auto Setpoint (union of
heat and cool setpoint
ranges)
38° to 99°F (3° to 37°C)
Heat only Setpoint 38° to 89°F (3° to 32°C)
Cool only Setpoint 59° to 99°F (15° to 37°C)
Humidity Setpoint 5% to 90 % RH1,2
Relay Rating 1 Amp @ 40 Volts DC or 24 Volts AC (nominal)
Power Requirements
24V 2 Watts (0.083 Amps) @ 24 Volts AC, supplied
by heating or cooling system
Cresnet Power Usage <1 Watts (<0.05 Amps @ 24 Volts DC),
required for Cresnet communication only
Display
Type Transflective LCD, backlit
Size 2.75 in (70 mm)
Resolution 128 x 64
Viewing Angle ±50° horizontal (@0° vertical), ±50° vertical
(@0° horizontal)
Default Net ID 2A
Minimum 2-Series Control
System Update File3, 4 Version 3.080.CUZ or later
Environmental
Temperature 41º to 104º F (5º to 40º C)
Humidity 10% to 90% RH (non-condensing)
Enclosure Plastic
Dimensions
Height 3.75 in (96 mm)
Width 5.00 in (127 mm)
Depth 1.04 in (27 mm)
Weight 5.80 oz (165 g)
1. Outdoor temperature/humidity sensing requires additional remote sensors, sold separately.
2. CHV-TSTAT requires additional remote humidity sensor for indoor humidity sensing, sold
separately.
3. The latest software versions can be obtained from the Crestron website. Refer to the NOTE
following these footnotes.
4. Crestron 2-Series control systems include the AV2 and PRO2. Consult the latest Crestron Product
Catalog for a complete list of 2-Series control systems.

Crestron CHV-TSTAT and CHV-THSTAT Thermostats
NOTE: Crestron software and any files on the website are for authorized Crestron
dealers and Crestron Authorized Independent Programmers (CAIP) only. New users
may be required to register to obtain access to certain areas of the site (including the
FTP site).
Physical Description
This section provides information on the connections, controls and indicators
available on your CHV-TSTAT and CHV-THSTAT.
CHV-TSTAT and CHV-THSTAT Physical View
66oF
43 %
68oF
HEATING
HEAT ONLY
ON LINE
H1 H2 AX
CHV-TSTAT and CHV-THSTAT Overall Dimensions (Front View)
5.00 in
(127 mm)
3.75 in
(96 mm)
1
2
3
4
5
MODE
VIEW
Operations and Installation Guide – DOC. 8163D Thermostats: CHV-TSTAT and CHV-THSTAT •5

Thermostats Crestron CHV-TSTAT and CHV-THSTAT
CHV-TSTAT and CHV-THSTAT Overall Dimensions (Side and Rear Views)
1.04 in
(27 mm)
3.27 in
(84 mm)
CHV-TSTAT and CHV-THSTAT Backplate (Front Cover Removed)
6789
TOP
HUM
RHU
RSR RSR
RS1 RS2 24(C)
24(R)
24V
Y
Z
G
NETWORK
RH RC G
Y/Y1 Y2
O
B W/W1
W2
6
6 •Thermostats: CHV-TSTAT and CHV-THSTAT Operations and Installation Guide – DOC. 8163D

Crestron CHV-TSTAT and CHV-THSTAT Thermostats
Operations and Installation Guide – DOC. 8163D Thermostats: CHV-TSTAT and CHV-THSTAT •7
Connectors, Controls & Indicators
# CONNECTORS,
CONTROLS &
INDICATORS
DESCRIPTION
1 MODE BUTTON
Access to the user controls (system mode,
fan mode, humidifier, Crestron system, and
global update)
2 VIEW BUTTON Access to humidity reading1,2, outdoor
temperature reading1,2, and system
messages
3 ▲
(UP BUTTON)
Selects user modes and increments
selection in setup modes
4 ▼
(DOWN BUTTON)
Selects user modes and decrements
selection in setup modes
5 LCD DISPLAY
Displays ambient temperature, humidity,
current setpoint, current activity, current
function, system information, internal relay
status, control system communication errors,
firmware download progress, setup
parameter/function and values
6 CONTROL
CONNECTIONS
(SYSTEM
DEPENDENT)
Terminal blocks
HUM: Energized to RHU during humidity
call
RHU: Reference for humidifier
RH: Reference Heat, used for calls to
heating system
RC: Reference Cool, used for calls to
cooling system
G: Fan, energized to RC during call for
fan
Y/Y1: Compressor (stage one), energized
to RC when compressor (or first
stage) is run
Y2: Compressor (stage two), energized
to RC on two-stage systems on call
for second stage
O: Changeover control, energized to
RC during cooling modes
B: Energized to RC during non-cooling
modes
W/W1: Heat (single stage)/heat (stage one)
energized to RH during a call for
heat in heat/cool systems or aux
heat in heat pump systems
W2: Heat (stage two), energized to RH
during a call for second stage heat in
heat/cool systems
1. Outdoor temperature/humidity sensing requires additional remote sensors, sold separately.
2. CHV-TSTAT requires additional remote humidity sensor for indoor humidity sensing, sold
separately.
(Continued on following page)

Thermostats Crestron CHV-TSTAT and CHV-THSTAT
8 •Thermostats: CHV-TSTAT and CHV-THSTAT Operations and Installation Guide – DOC. 8163D
Connectors, Controls & Indicators (Continued)
# CONNECTORS,
CONTROLS &
INDICATORS
DESCRIPTION
7 REMOTE SENSING
CONNECTIONS
(OPTIONAL)
Terminal block
RSR: Remote Sensor Returns – Common
sensor terminal
RS1: Remote Sensor terminal – Connect
the sensor from RS1 to RSR
RS2: Remote Sensor terminal – Connect
the sensor from RS2 to RSR
8 POWER
CONNECTIONS
(REQUIRED)
Terminal block
24 (C): 24 VAC common terminal supplies
remote 24 VAC power to thermostat
24 (R): 24 VAC reference terminal. Can be
connected to RH or RC by P4
jumper setting, or tied directly to
power source (refer to “System
Connections” on page 10)
9 NETWORK
(OPTIONAL)
Terminal block, connects to Cresnet control
network
24: Power (24 Volts DC)
Y: Data
Z: Data
G: Ground

Crestron CHV-TSTAT and CHV-THSTAT Thermostats
Operations and Installation Guide – DOC. 8163D Thermostats: CHV-TSTAT and CHV-THSTAT •9
Setup
Network Wiring
When wiring the Cresnet®network, consider the following:
• Use Crestron Certified Wire.
• Use Crestron power supplies for Crestron equipment.
• Provide sufficient power to the system.
• For networks with 20 or more devices, use a Cresnet Hub/Repeater (CNXHUB)
to maintain signal quality.
CAUTION: Insufficient power can lead to unpredictable results or damage to the
equipment. Please use the Crestron Power Calculator to help calculate how much
power is needed for the system (www.crestron.com/calculators).
For more details, refer to “Check Network Wiring” on page 81.
Identity Code
The Net ID of the CHV-TSTAT/CHV-THSTAT has been factory set to 2A. The Net
IDs of multiple CHV-TSTAT/CHV-THSTAT devices in the same system must be
unique. Net IDs are changed from a personal computer (PC) via Crestron Toolbox™
(refer to “Establishing Communication” on page 75).
When setting the Net ID, consider the following:
• The Net ID of each unit must match an ID code specified in the SIMPL™
Windows program.
• Each network device must have a unique Net ID.
For more details, refer to the Crestron Toolbox help file.

Thermostats Crestron CHV-TSTAT and CHV-THSTAT
System Connections
NOTE: Installers should have a strong working knowledge of HVAC systems.
CHV-TSTAT and CHV-THSTAT Backplate – Front View With Cover Removed
TOP
HUM
RHU
RSR RSR
RS1 RS2 24(C)
24(R)
24V
Y
Z
G
NETWORK
RH
RC G
Y/Y1 Y2
O
B
W/W1
W2
Backplate
24(R) - 24 VAC reference terminal. Can be connected to RH or RC
by P4 jumper setting (refer to following page), or tied directly
to power source
24(C) - 24 VAC common terminal supplies remote 24 VAC power
to thermostat
RS2 - Remote Sensor terminal - Connect the sensor from RS2 to RSR
RS1 - Remote Sensor terminal - Connect the sensor from RS1 to RSR
RSR - Remote Sensor Returns - Common sensor terminal
RHU - Reference for humidifier
HUM - Energized (connected) to RHU during humidity call
W2 - Heat (stage two), energized (connected) to RH during a call for
second stage heat in heat/cool systems
W/W1 - Heat (single stage)/heat (stage one) energized
to RH during a call for heat in heat/cool systems or aux heat
in heat pump systems or Slab Heat in Slab Systems.
B - Energized to RC during non-cooling modes
O- Changeover control, energized to RC during cooling modes
Y2 - Compressor (stage two), energized to RC on two-stage
systems on call for second stage
Y/Y1 - Compressor (stage one), energized to RC when
compressor (or first stage) is run
G- Fan, energized to RC during call for fan
RC - Reference Cool, used for calls to cooling system
RH - Reference Heat, used for calls to heating system
Network Connection
for Crestron
Installer Only
10 •Thermostats: CHV-TSTAT and CHV-THSTAT Operations and Installation Guide – DOC. 8163D

Crestron CHV-TSTAT and CHV-THSTAT Thermostats
Wiring Diagrams
The wiring diagrams that follow show connections for the CHV-TSTAT and
CHV-THSTAT. The heating or cooling system can supply power to the thermostat,
or a separate transformer can supply it. In many installations, spare conductors are
available to supply 24 VAC to the thermostat, using the C(24 VAC common)
connection on the HVAC equipment.
The P4 jumper internally connects either the RH (Reference Heat system) or RC
(Reference Cooling system), relieving the installer from connecting a jumper from
the 24(R) terminal to the RH or RC terminal.
If power is available from the HVAC system, follow the diagrams for the proper P4
jumper connection.
When power is not available from the HVAC system, a separate transformer,
connected between 24(R) and 24(C) terminals, can provide power to the thermostat.
When powered by a separate transformer, ensure that the P4 jumper is connected
across pins 2 and 3 (No Connection) to prevent damage to the thermostat and the
HVAC system.
CAUTION: The P4 Jumper Position on the Circuit Board is critical to proper
operation. Improper P4 jumper position can cause equipment damage. The P4
jumper connects the 24(R) terminal to the RH, or RC connector. Refer to the
following illustration.
P4 Jumper Position
1
2
3
4
P4 Connects 24(R) to RH
Connects 24(R) to RC
No Connection
NOTE: Ensure that the power circuits are shut off at the source before connecting
the thermostat. Provide disconnect means and overload protection as required for the
power supply.
NOTE: Ensure that the transformer has sufficient power for all the thermostats in
the system, or use multiple transformers. Refer to the power requirements in
“Specifications” on page 3.
The following diagrams are examples of connections for heat, heat/cool and one-
stage and two-stage heat pump systems, and various slab systems.
NOTE: Use either connector O or B as required, for changeover control.
Operations and Installation Guide – DOC. 8163D Thermostats: CHV-TSTAT and CHV-THSTAT •11

Thermostats Crestron CHV-TSTAT and CHV-THSTAT
Separately Powered Two Wire Heat Systems
(Powered by an Independent Transformer)
Independent Transformer Connection – P4 Jumper Connects Pins 2 and 3
Single Stage Heat Only Systems
Single Stage Heat Only System Powered – P4 Jumper Connects Pins 1 and 2
12 •Thermostats: CHV-TSTAT and CHV-THSTAT Operations and Installation Guide – DOC. 8163D

Crestron CHV-TSTAT and CHV-THSTAT Thermostats
Single Stage Heat with Fan Control Systems
Single Stage Heat with Fan Control – P4 Connects Pins 1 and 2 – Additional Jumper Connects RH to RC
Single Stage Cool Only Systems
Single Stage Cool Only – P4 Jumper Connects Pins 3 and 4
Operations and Installation Guide – DOC. 8163D Thermostats: CHV-TSTAT and CHV-THSTAT •13

Thermostats Crestron CHV-TSTAT and CHV-THSTAT
Single Stage Heat/Cool with Integrated Control Unit
Systems
Single Stage Heat/Cool with Integrated Control Unit – P4 Jumper Connects Pins 1 and 2 – Additional Jumper RH to RC
14 •Thermostats: CHV-TSTAT and CHV-THSTAT Operations and Installation Guide – DOC. 8163D