Honeywell TH8320U Installation Instructions Manual
Touch screen programmable thermostats
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Also See for TH8320U:
- Operating manual (96 pages) ,
- Installation manual (13 pages) ,
- Operating manual (20 pages)
Table of Contents
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TH8320U and TH8321U Touch Screen
APPLICATION
The TH8320U and TH8321U Touch Screen Universal Programmable Thermostats provide electronic control of 24 Vac
heating and cooling systems or 750 mV heating system. See Table 1 for a general description.
Power
Model
Method
TH8320U
Batteries or
common wire
TH8321U
MERCURY NOTICE
If this control is replacing a control that contains
mercury in a sealed tube, do not place your old
control in the trash. Dispose of properly.
Contact your local waste management authority
for instructions regarding recycling and the
proper disposal of the old control.
INSTALLATION
When Installing this Product...
1. Read these instructions carefully. Failure to follow
the instructions can damage the product or cause
a hazardous condition.
2. Check the ratings given in the instructions to make
sure the product is suitable for your application.
3. Installer must be a trained, experienced service
technician.
4. After completing installation, use these instructions
to check out the product operation.
® U.S. Registered Trademark
Copyright © 2004 Honeywell International Inc. •
Programmable Thermostats
Table 1. TH832 Thermostats Description.
Changeover
System Selection
Automatic or
Heat-Off-Cool-
manual
Auto (Em. Heat for
selectable
heat pumps)
• All Rights Reserved
INSTALLATION INSTRUCTIONS
Fan Selection
On-Auto-Circ
Selecting Location
Install the thermostat about 5 ft. (1.5m) above the floor in
an area with good air circulation at average temperature.
See Fig. 1.
NO
NO
Fig. 1. Selecting thermostat location.
Comments
System and Fan selection
vary based on system type
System and Fan selection
vary based on System type.
Humidity sensor to control
dehumidification.
NO
YES
5 FEET
[1.5 METERS]
M19925
69-1706
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Table of Contents
Related Manuals for Honeywell TH8320U
Summary of Contents for Honeywell TH8320U
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Page 1: Programmable Thermostats
Programmable Thermostats INSTALLATION INSTRUCTIONS APPLICATION The TH8320U and TH8321U Touch Screen Universal Programmable Thermostats provide electronic control of 24 Vac heating and cooling systems or 750 mV heating system. See Table 1 for a general description. Table 1. TH832 Thermostats Description. -
Page 2: Wiring
TH8320U AND TH8321U TOUCH SCREEN PROGRAMMABLE THERMOSTATS Do not install the thermostat where it can be affected by: 3. Securely tighten each screw. — Drafts or dead spots behind doors and in corners. 4. Push excess wire back into the hole. - Page 3 TH8320U AND TH8321U TOUCH SCREEN PROGRAMMABLE THERMOSTATS CONVENTIONAL CONVENTIONAL OPTIONAL OPTIONAL 24 VAC 24 VAC COMMON COMMON CONNECTION CONNECTION HEAT RELAY RELAY OUTDOOR/INDOOR OUTDOOR/INDOOR TEMPERATURE TEMPERATURE SENSOR COMPRESSOR SENSOR CONTACTOR POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD HEAT RELAY PROTECTION AS REQUIRED.
- Page 4 TH8320U AND TH8321U TOUCH SCREEN PROGRAMMABLE THERMOSTATS CONVENTIONAL CONVENTIONAL OPTIONAL 24 VAC COMMON CONNECTION RELAY OUTDOOR/INDOOR OUTDOOR/INDOOR TEMPERATURE TEMPERATURE COMPRESSOR SENSOR SERIES 20 SENSOR CONTACTOR MOTOR OR VALVE POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD FACTORY INSTALLED JUMPER.
- Page 5 TH8320U AND TH8321U TOUCH SCREEN PROGRAMMABLE THERMOSTATS CONVENTIONAL OPTIONAL 24 VAC COMMON CONNECTION MUST COME FROM THE COOLING TRANSFORMER. FAN RELAY OUTDOOR/INDOOR TEMPERATURE SENSOR COOL RELAY 2 COOL RELAY 1 HEAT RELAY 2 HEAT RELAY 1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
- Page 6 TH8320U AND TH8321U TOUCH SCREEN PROGRAMMABLE THERMOSTATS HEAT PUMP OPTIONAL 24 VAC COMMON CONNECTION FAN RELAY OUTDOOR/INDOOR TEMPERATURE SENSOR CHANGEOVER VALVE COMPRESSOR 2 COMPRESSOR 1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. FACTORY INSTALLED JUMPER. MUST CONNECT THE 24 VAC COMMON WHEN USING L. THE TERMINAL IS SHOWN AS EQUIPMENT MONITOR, CAN ALSO BE USED AS A 24 VAC OUTPUT.
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Page 7: Powering The Thermostat
TH8320U AND TH8321U TOUCH SCREEN PROGRAMMABLE THERMOSTATS EQUIPMENT HEAT PUMP MONITOR OPTIONAL 24 VAC COMMON CONNECTION FAN RELAY OUTDOOR/INDOOR TEMPERATURE SENSOR CHANGEOVER VALVE HEAT 2 RELAY (AUXILIARY HEAT) EMERGENCY COMPRESSOR 2 COMPRESSOR 1 HEAT RELAY POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. -
Page 8: Using The Thermostat
TH8320U AND TH8321U TOUCH SCREEN PROGRAMMABLE THERMOSTATS WALL SET CURRENT DAY SET MONTH SAT A A T DONE USE ARROWS TO SET YEAR AND TIME M19919 SAT A A T OK TO PICK MULTIPLE DAYS SCREEN LOCKED CHANGE FILTER UV LAMP HUMIDIFIER PAD Fig. -
Page 9: Operation
TH8320U AND TH8321U TOUCH SCREEN PROGRAMMABLE THERMOSTATS OPERATION INSTALLER SETUP This Universal Thermostat works with many different System and Fan Settings system types. To operate correctly, the thermostat must The System default setting is Heat and the Fan default be set up to operate the installed heating and/or cooling setting is Auto. - Page 10 TH8320U AND TH8321U TOUCH SCREEN PROGRAMMABLE THERMOSTATS Changing Installer Setup Selections 4. The Installer Setup Number is displayed in the lower left. It is a four-digit code beginning with zero. 1. Advance to the next Installer Setup Number by The factory setting or other choice selection is dis- pressing the up and down arrow keys to the right of played in the lower right.
- Page 11 TH8320U AND TH8321U TOUCH SCREEN PROGRAMMABLE THERMOSTATS Table 4. Main Installer Setup Menu. (Continued) Factory Setting Other Choices Installer Setup Select Number Option Description Options Description Comments System Type 0170 1 Heat/1Cool 1-12 1—1heat/1cool Available Selection 2—single-stage heat options and pump (no aux.
- Page 12 TH8320U AND TH8321U TOUCH SCREEN PROGRAMMABLE THERMOSTATS Table 4. Main Installer Setup Menu. (Continued) Factory Setting Other Choices Installer Setup Select Number Option Description Options Description Comments Cycles per 0240 Conventional Heat 1-12 1-12 available; typical Not shown if hour (cph) for...
- Page 13 TH8320U AND TH8321U TOUCH SCREEN PROGRAMMABLE THERMOSTATS Table 4. Main Installer Setup Menu. (Continued) Factory Setting Other Choices Installer Setup Select Number Option Description Options Description Comments Cycles per 0260 Cycles per hour (cph) 1-12 1-12 available; typical Only shown...
- Page 14 TH8320U AND TH8321U TOUCH SCREEN PROGRAMMABLE THERMOSTATS Table 5. Regional Settings Menu. Installer Factory Setting Other Choices Setup Select Number Option Description Options Description Comments Changeover 0300 Manual changeover 1—auto — changeover Deadband 0310 Heating and cooling 2 thru 9...
- Page 15 TH8320U AND TH8321U TOUCH SCREEN PROGRAMMABLE THERMOSTATS Table 5. Regional Settings Menu. (Continued) Installer Factory Setting Other Choices Setup Select Number Option Description Options Description Comments Remote 0340 No remote 1—outdoor Defaults and Temperature temperature sensor temperature sensor Options depend on Sensor for display only.
- Page 16 TH8320U AND TH8321U TOUCH SCREEN PROGRAMMABLE THERMOSTATS Table 6. Advanced Settings Menu. Installer Factory Setting Other Choices Setup Select Number Option Description Options Description Comments Furnace Filter 0500 Furnace filter change 1—10 run time Run time based on Change reminder off days call for fan.
- Page 17 TH8320U AND TH8321U TOUCH SCREEN PROGRAMMABLE THERMOSTATS Table 6. Advanced Settings Menu. (Continued) Installer Factory Setting Other Choices Setup Select Number Option Description Options Description Comments Keypad 0670 Unlocked keypad 1, 2 1—partially locked Unlocked—all Lockout keypad functions are 2—fully locked available.
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Page 18: System Checkout
TH8320U AND TH8321U TOUCH SCREEN PROGRAMMABLE THERMOSTATS SYSTEM CHECKOUT Installer System Test CAUTION The Installer System Test mode is used to test the HVAC system(s). See Table 7. While in System Test mode, Equipment Damage Hazard. minimum off -time for compressors is bypassed. -
Page 19: Advanced Features
TH8320U AND TH8321U TOUCH SCREEN PROGRAMMABLE THERMOSTATS ADVANCED FEATURES Outdoor or Indoor Temperature Sensor 4. Choose Compressor Lockout Temperature in Installer Setup Number 0350. Allow outdoor or indoor temperature sensor to absorb the 5. Choose Auxiliary Lockout Temperature in air for a minimum of five minutes before taking a reading. - Page 20 TH8320U AND TH8321U TOUCH SCREEN PROGRAMMABLE THERMOSTATS TROUBLESHOOTING (SEE TABLE 8) Table 8. Troubleshooting. Symptom Possible Cause Action Display does not come on. Thermostat is not being Check for 24 Vac between C and Rc. powered. Check that AAA batteries are installed correctly and are good.
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Questions and answers
This morning the screen is blank. I cannot get anything on it...does it need new batteried or something?
The Honeywell TH8320U thermostat may not necessarily need new batteries if the screen is blank. First, check the circuit breaker and reset if necessary, ensure the power switch at the heating and cooling system is on, and verify that the furnace door is securely closed. If the thermostat is battery-powered, install fresh AAA alkaline batteries correctly.
This answer is automatically generated