Pro 1 IAQ T621-2 User manual

This manual covers the following models:
• T621-2
OPERATING MANUAL
Caution:
Equipment damage hazard
Do not operate the cooling
system if the outdoor
temperature is below 50˚ F
(10˚ C) to prevent possible
compressor damage.
Thermostat Quick Reference
Thermostat Operation
More Information
Contact Us and Warranty Registration
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Congratulations on purchasing a
new thermostat. This thermostat was
designed to the highest reliability and
ease of use standards. Thank you for
choosing Pro1.
® U.S. Registered Trademark. Patents pending.
Copyright © 2010 Pro1 IAQ, Inc. All rights reserved. Rev. 1043
Table of Contents Page
1
Need Help?
For assistance with this product please
visit http://www.pro1iaq.com or call Pro1
Customer Care toll-free at 888-Pro1iaq
(776-1427) during normal business hours
(Mon-Fri 9 AM - 6 PM Eastern)
Una versión española de este
manual puede ser descargada
en www.pro1iaq.com

THERMOSTAT QUICK REFERENCE
Battery door information
2
Use the finger bevel on
the lower portion of the
side of the thermostat to
open the easy access
battery door.
Important:
The low battery indicator is displayed
when the AA battery power is low. If
the user fails to replace the battery
within 21 days, the thermostat
display will only show the low battery
indicator as a final warning before the
thermostat becomes inoperable.
Getting to know your thermostat
LCD
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2Fan Switch
3System Switch
4Easy Change Battery Door
5Setpoint Buttons
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4
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Low Battery Indicator:
Replace batteries when
indicator is shown.
+1 will appear in the
display when the auxiliary
heat is active.
Indicates the current
room temperature.
Displays the user
selectable setpoint
temperature.
System operation
indicators: ON will
display when the
COOL, HEAT or
Emergency Heat is on.

THERMOSTAT OPERATION
3
Caution:
When the battery icon
appears replace your AA
batteries immediately. Failure
to do so may result in your
heating & cooling system
becoming inoperable.
Easy to use controls
LCD Display:
See page 2 for details about this
display read out.
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4Temperature Setpoint Buttons:
Press the or buttons to
select the desired room temperature.
Fan Switch:
Select ON or AUTO. ON will run
the fan continuously. AUTO will cycle
the fan on only when the heating or
cooling system is on.
System Switch:
Selects the operation mode of your
HVAC system. Selecting HEAT turns
on the heat mode. Selecting COOL
turns on the air conditioning mode.
Selecting OFF turns both heating
and cooling off. Selecting EmH locks
out your compressor and turns on
the secondary heat mode.
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Understanding Thermostat Staging
Your thermostat will control two stages
of heating. The thermostat will try to
maintain your comfort setting using the
first stage for energy efficiency. The
second stage of heating will only be
used if your thermostat cannot maintain
your comfort setting using only one
stage. When the second stage is used
you will see +1 in the display.

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CONTACT US AND WARRANTY INFORMATION
Warranty Registration:
Your new Pro1 thermostat has a 5 year limited warranty. You must register your warranty
within 60 days of installation. You can register your new thermostat in 2 ways.
Go to www.pro1iaq.com, select warranty registration and fill out a short registration form.
- or -
Complete the form below and mail it to the address shown.
Name: ____________________________
Address: ____________________________
____________________________
City: ____________________________
State: ____________________________
Zip: _____________________
Thermostat Model: _____________________
Date Installed: _____________________
Contact Us Information
Pro1 IAQ Warranty Registration:
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Pro1 IAQ Inc.
1111 S. Glenstone
Suite 2-100
Springeld, MO 65804
Toll-free: 1-888-Pro1iaq (776-1427)
Toll Number (Outside the USA): 330-821-3600
Web: http://www.pro1iaq.com
Hours of Operation: Monday - Friday 9 AM - 6 PM Eastern
Complete form and mail to:
Pro1 IAQ Inc.
1111 S. Glenstone
Suite 2-100
Springeld, MO 65804