Carrier TSTAT - User Manual

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Installation, Start-Up, and
Operating Instructions
NOTE: Read the entire instruction manual before starting the
installation.
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INDEX Page
SAFETY CONSIDERATIONS ........................ 1
INTRODUCTION .................................. 1
INSTALLATION CONSIDERATIONS ................. 1
INSTALLATION ................................... 2
HUMIDITY CONTROL FEATURES ................... 8
OPERATIONAL INFORMATION .................... 11
TROUBLESHOOTING ............................. 12
CONFIGURATION RECORD ........................ 13
WIRING DIAGRAM .... See Thermidistat _" Wiring Diagrams
SAFETY CONSIDERATIONS
Read and follow manufacturer instructions carefully. Follow all
local electrical codes during installation. All wiring must conform
to local and national electrical codes. Improper wiring or
installation may damage Thermidistat Control.
Recognize safety information. This is the safety-alert symbol
z_. When you see this symbol on the equipment and in the
instruction manual, be alert to the potential for personal injury.
Understand the signal words DANGER, WARNING, and
CAUTION. These words are used with the safety-alert symbol.
DANGER identifies the most serious hazards which will result in
severe personal injury or death. WARNING signifies a hazard
which could result in personal injury or death. CAUTION is
used to identify unsafe practices which would result in minor
personal injury or product and property damage. NOTE is used
to highlight suggestions which will result in enhanced
installation, reliability, or operation.
INTRODUCTION
Carrier's 7-day programmable / non-programmable
Thermidistat _" Control is a wall-mounted, low-voltage control
which combines temperature and humidity control in a single
attractive unit. An extension of Carrier's proven line of
thermostats, it provides separate set points for heating and
cooling, and now adds humidification and dehumidification.
Different heating and cooling set points and times are
programmable for 4 periods per day and 7 days per week. The
Thermidistat Control can also be field-configured as a
non-programmable thermostat. When operating in the
non-programmable configuration it will still have both
temperature and humidity control. Humidify and dehumidify
\
A98426
Height (In.) Width (In.) Depth (In.)
4- 3/8 7- 3/8 1- 3/8
Fig. 1 - Carrier Programmable Thermostat Control
outputs provide direct control of humidity. Batteries are not used.
During power loss an internal memory stores programs and
settings for unlimited time, and the clock continues to run for at
least 8 hr.
INSTALLATION CONSIDERATIONS
POWER
Note that this control does not require batteries and is not "power
stealing." It does require 24vac (R and (7 terminals) of the
low-voltage transformer to be connected to it for proper
operation. It will not operate without these 2 connections.
MODELS
There is a single programmable/non-programmable model for all
applications. It can be configured for AC or HP, 1-or 2-stage
compressor, and for Hybrid Heat" installations, allowing it to be
used in place of all Carrier thermostats.
HUMIDIFY EQUIPMENT AND CONNECTIONS
The humidify output connects directly to 24vac operated
humidifiers. No other connection or interlock is required. Any of
several installer-selectable operating modes are available.

Summary

Safety Considerations

Safety Symbols and Signal Words

Explains the safety-alert symbol and signal words (DANGER, WARNING, CAUTION).

Installation Considerations

Power, Models, and Humidify Connections

Covers power requirements, available models, and humidify equipment connections.

Dehumidify Equipment and Connections

Dehumidify Output Logic

Explains the reversed logic of the DHUM output for existing equipment.

Installation

Thermidistat Control Location

Provides guidelines for choosing the thermostat's mounting location.

DIP Switch Configuration

Details setting DIP switches for system type, recovery, and test modes.

Physical Mounting

Step-by-step instructions for physically installing the thermostat.

Configuration Options Summary

Overview of Configuration Settings

Lists all 17 configuration options available for the thermostat.

Configuration Mode Operation

Entering and Navigating Configuration

Describes how to access and navigate the thermostat's configuration menu.

Configuration Option 1: Anticipator Adjustment

Adjusting Anticipator Sensitivity

Controls thermostat sensitivity and cycle rate.

Configuration Option 4: Fan (G) On With W

Fan Control During Heating

Configuration Option 5: Variable-Speed (ICM) Blower

Variable-Speed Blower Configuration

Configuration Option 7: Variable-Speed Superdehumidify

Super Dehumidification Setting

Configuration Option 8: Auxiliary Heat Lockout Setting

Auxiliary Heat Lockout

Configuration Option 9: Intelligent Heat Staging

Intelligent Heat Staging Control

Configuration Option 10: Hybrid Heat Equipment

Hybrid Heat Equipment Selection

Configuration Option 11: Balance Point Setting

Balance Point Setting

Configuration Option 12: Defrost Heat Select

Defrost Heat Selection

Configuration Option 16: Enable Super Comfort Heat Mode

Super Comfort Heat Mode

Configuration Option 17: Enable Non-Programmable Operation

Non-Programmable Operation Conversion

Converts the thermostat to non-programmable mode.

System Start-Up and Checkout

Installer Test Mode

Enables easy equipment testing without delays or set point adjustments.

Testing Fan Operation

Testing Cooling and Dehumidification

Testing Primary Heating and Humidification

Testing Auxiliary Heating

Final Settings

Setting Mode and Hold

Humidity Control Features

Humidification Selections

Dehumidification Selections

Dehumidification

Normal Dehumidify Operation

Cool to Dehumidify

Operational Information

Compressor Timeguard

Cycle and Staging Timers

Minimum On Time

Error Codes

Troubleshooting Error Codes

Lists common error codes and their corresponding checks.

Thermidistat Control Troubleshooting

Troubleshooting Symptoms

Provides checks for common system symptoms like no display or errors.

Thermidistat Control Configuration Record

Hardware and Mode Settings

Records initial hardware configuration and operating mode settings.

Configuration Options Record

Details selected values for all 17 configuration options.

Carrier TSTAT Specifications

General

Category	Thermostat
Display Type	LCD
Compatibility	HVAC Systems
Programmable	Yes
Backup Battery	Yes
Wi-Fi Capable	Some models
Humidity Control	Some models