Honeywell TB7220U CommercialPRO User Manual

INSTALLATION INSTRUCTIONS
62-0221-05
TB7220U
CommercialPRO™
Programmable Thermostat
APPLICATION
The TB7220U Programmable Thermostat provides electronic control of 24 Vac heating and cooling systems.
See Table 1 for a description.
Table 1. TB7220U Thermostat Description.
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 an old control.
INSTALLATION
When Installing this Product...
1. Read these instructions carefully. Failure to follow
them could damage the product or cause a
hazardous condition.
2. Check ratings given in instructions and on the
product to ensure the product is suitable for your
application.
3. Installer must be a trained, experienced service
technician.
4. After installation is complete, check out product
operation as provided in these instructions.
CAUTION
Electrical Shock or Equipment Damage
Hazard.
Can shock individuals or short equipment
circuitry.
Disconnect power supply before installation.
Select Thermostat Location
Select a location for the thermostat about 5 ft (1.5m)
above the floor in an area with good air circulation at
average temperature. See Fig. 1.
Feature Description
Powering Methods • Battery only
• Direct connection to a 24 Vac transformer only
• Direct connection to a 24 Vac transformer with battery backup
System Types • Conventional (up to 2 Heat, 2 Cool stages)
• Heat Pump (up to 3 Heat, 2 Cool stages)
Changeover Manual or automatic changeover (selectable)
System Setting Heat-Off-Cool-Auto
Fan Setting Auto-On

Honeywell TB7220U CommercialPRO Specifications

General

Display	Backlit LCD
Voltage	24V
Wi-Fi Capability	No
Power Method	Hardwired
Programmability	7-day programmable
Operating Modes	Heat, Cool, Auto, Off
Fan Modes	Auto, On
Hold Function	Yes
Backup Battery	No
Stages	2 Heat/2 Cool
Terminal Designations	R, C, W, Y, G
Changeover	Automatic changeover
Weight	0.5 lbs

Summary

Application

Mercury Notice

Notice regarding proper disposal of mercury-containing controls.

Caution

Warning about electrical shock and equipment damage during installation.

Select Thermostat Location

Guidance on choosing an optimal location for thermostat installation.

Installation

Separate Wallplate from Thermostat

Install Wallplate

Wiring

Terminal "A" Wiring Details for Economizers

Details for wiring the Terminal A for economizer functions, referencing specific diagrams.

Conventional System Wiring

Heat Pump System Wiring

Sensor Wiring for Temperature Averaging

Power the Thermostat

Wiring 24 Vac Common

Instructions for connecting the common wire for single and two-transformer systems.

Installing Batteries

Steps for installing AA alkaline batteries into the thermostat.

Mount Thermostat to Wallplate

Procedure for attaching the thermostat to the installed wallplate.

Setting Calendar and Time

Setting Date/Time When Thermostat is First Powered

Guide for setting the initial calendar and time upon first power-up.

Setting Date/Time After Thermostat is Already Functioning

Instructions for adjusting calendar and time when the thermostat is already in use.

Advanced Settings

Installer Setup Numbers, Settings, and Tests

Operation

System Settings

Defines thermostat control modes: Heat, Off, Cool, and Auto.

Fan Settings

Explains fan operation modes: Auto and On.

Minimum-Off Timer (Compressor Protection)

Details compressor protection timer settings and activation.

Outdoor or Indoor Temperature Sensor

Guidance on using remote sensors for temperature readings.

Economizer/TOD Logic

Explains the logic for economizer and TOD operation based on terminal A.

Heat Pump Temperature Lockouts

Describes temperature lockouts for dual fuel heat pumps and auxiliary heat.

Operation in Heat Mode

Details heat pump operation based on outdoor temperature and balance points.

Troubleshooting

Specifications