Pro 1 IAQ T721 User manual

This manual covers the following models:
• T721
INSTALLATION MANUAL
A trained, experienced technician
must install this product.
Carefully read these instructions. You
could damage this product or cause a
hazardous condition if you fail to follow
these instructions.
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)
Installation Tips
Thermostat Quick Reference
Subbase Installation
Wiring
Technician Setup
Technician Setup Menu
Mounting and Battery Installation
Set Time
Specifications and Contact
® U.S. Registered Trademark. Patents pending.
Copyright © 2006 Pro1 IAQ, Inc. All rights reserved.
Table of Contents
Thermostat Applications Guide
Page
Battery Power
Hardwire (Common Wire)
Hardwire (Common Wire) with Battery Backup
Power Type
1
noitpircseD
Gas or Oil Heat
Electric Furnace
Heat Pump (No Aux. or Emergency Heat)
Heat Pump (with Aux. or Emergency Heat)
Multi-stage Systems
Heat Only Systems
Heat Only Systems - Floor or Wall Furnaces
Cool Only Systems
Millivolt
No
No
Yes
Yes
No
No
No
No
No
Rev. 0850
Una versión española de este
manual puede ser descargada
en www.pro1iaq.com
2
3
4
5
6
7
8
9
10

INSTALLATION TIPS
The thermostat should be installed approximately 4 to 5 feet above the floor.
Select an area with average temperature and good air circulation.
Do not install thermostat in locations:
• Close to hot or cold air ducts
• That are in direct sunlight
• With an outside wall behind the thermostat
• In areas that do not require conditioning
• Where there are dead spots or drafts (in corners or behind doors)
• Where there might be concealed chimneys or pipes
Pick an installation location that is easy for the user to access. The temperature of the location
should be representative of the building.
Wall locations
2
PRO1 Tip
NO
NO NO YES

3
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
1
2
Fan Switch
3
System Switch
4
Easy Change Battery Door
5
Setpoint Buttons
6
User Buttons
7
Displays the user
selectable setpoint
temperature.
System operation
indicators: The COOL,
HEAT or FAN icon will
display when the COOL,
HEAT or FAN is on.
NOTE: The compressor
delay feature is active if
these icons are flashing.
The compressor will not
turn on until the 5 minute
delay has elapsed.
Days of the
week and time
Button
options
Glow in the Dark Light Button
6
7
1
2
3 4
5
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.

UP
SUBBASE INSTALLATION
4
Caution:
Electrical Hazard
Failure to disconnect the
power before beginning to
install this product can cause
electrical shock or equipment
damage.
Mercury Notice:
All of Pro1’s products are
mercury free. However, if the
product you are replacing
contains mercury, dispose of it
properly. Your local waste
management authority can give
you instructions on recycling
and proper disposal.
Horizontal mount
Horizontal mount
Vertical mount
Vertical mount
For vertical mount put
one screw top and one
screw bottom.
For horizontal mount put
one screw left and one
screw right.
C
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W2
R
G
Y

WIRING
5
Caution: Electrical Hazard
Failure to disconnect the power
before beginning to install this
product can cause electrical
shock or equipment damage.
Warning:
All components of the control
system and the thermostat
installation must conform to
Class II circuits per the NEC Code.
Wiring
If you are replacing a thermostat, make
note of the terminal connections on the
thermostat that is being replaced. In some
cases the wiring connections will not be
color coded. For example, the green wire
may not be connected to the Gterminal.
Loosen the terminal block screws. Insert
wires then retighten terminal block screws.
Place nonflammable insulation into wall
opening to prevent drafts.
1.
2.
3.
Note: This cross reference represents typical systems and is not necessarily representative of your particular
application. Always consult the original equipment manufacturer for proper installation instructions.

6
TECHNICIAN SETUP
Fahrenheit/Celsius Display
12 or 24 Hour Time
Terminal Designations
Auxiliary heat relay - Stage 2
Compressor relay - Stage 1
Fan relay
Heat pump changeover valve
energized in cooling
Transformer power
Common wire from
system transformer
Heat pump changeover valve
energized in heating
Emergency heat relay
W2
Y
G
O
R
C
B
E
Select For Cwith the jumper pin on the
back of the thermostat. Fis for
Fahrenheit and Cis for Celsius.
12 or 24 hour (military time) can be
selected with the jumper pin.
Important:
The RESET button must be
pressed after changing any
switch or jumper pin
setting. Batteries must be
installed for this operation.
12 or 24 hour
jumper pin
Select For C
with the jumper pin
Reset button
Note:
In many systems with no emergency heat relay
a jumper can be installed between E and W2.

7
TECHNICIAN SETUP MENU
The second stage will turn on at 2x the swing setting. The second stage will turn off when 1x the swing is
reached. For example, if the swing setting is .8 degrees for heating and the thermostat is set at 70ºF, the
first stage will turn on at approximately 69.2ºF. The second stage will turn on at 68.4ºF. The second stage
will turn off at 69.2ºF and the first will turn off at 70.8ºF.
PRO1 Tip
Technician Setup Menu
This thermostat has a technician setup menu
for easy installer configuration. To setup the
thermostat for your particular application:
Configure the installer options as
desired using the table below.
Use the or keys to
change settings and the NEXT STEP
or PREV STEP key to move from one
option to another. Note: Only press
DONE key when you want to exit the
Technician Setup options.
Press MENU button
Press and hold TECH SET button for 3
seconds. This 3 second delay is
designed so that homeowners do not
accidentally access the installer settings.
1.
2.
3.
This feature will
flash “FILT” in the
display after the
elapsed run time
to remind the
user to change the
filter. A setting of
“off” will disable
this feature.
This feature allows
the installer to
change the
calibration of the
room temperature
display. For
example, if the
thermostat reads 70°
and you would like it
to read 72° then
select +2.
The compressor short
cycle delay protects
the compressor from
“short cycling”. This
feature will not allow
the compressor to be
turned on for 5
minutes after it was
last turned off.
The swing setting,
often called “cycle
rate”, “differential”
or “anticipation” is
adjustable. A smaller
swing setting will
cause more frequent
cycles and a larger
swing setting will
cause fewer cycles.
The swing setting,
often called “cycle
rate”, “differential”
or “anticipation” is
adjustable. A
smaller swing setting
will cause more
frequent cycles and a
larger swing setting
will cause fewer
cycles.
When on, this
feature turns off
the Y terminal 45
seconds after the
second stage of
heat turns on.
The heating swing
setting is adjustable
from ±0.4°F to
±2°F. For example:
A swing setting of
0.5°F will turn the
heating on at
approximately 0.5°F
below the setpoint
and turn the heating
off at approximately
0.5°F above the
setpoint.
Selectable on or off.
This option should be
“ON” for “DUAL
FUEL” applications
that use a gas
furnace for auxiliary
heat.
The cooling swing
setting is adjustable
from ±0.4°F to
±2°F. For example:
A swing setting of
0.5°F will turn the
cooling on at
approximately 0.5°F
above the setpoint
and turn the cooling
off at approximately
0.5°F below the
setpoint.
Selecting “ON” will
not allow the
compressor to be
turned on for 5
minutes after the last
time the compressor
was on. Select “off”
to remove this delay.
You can select the
minimum compressor
run time from “off”,
“3”, “4”, or “5”
minutes. If 3, 4, or 5
is selected, the
compressor will run
for at least the
selected time before
turning off.
You can adjust the
room temperature
display to ready -4°F
to +4°F above or
below the factory
calibrated reading.
You can adjust
the filter change
reminder from
“off” to 2000
hours of runtime
in 50 hour
increments.
Off 0 ºF Off On 0.8 ºF 0.8 ºF Off
This feature allows the
installer to select the
minimum run time for
the compressor.
For example, a setting
of 4 will force the
compressor to run for
at least 4 minutes
every time the
compressor turns on,
regardless of the room
temperature.
Tech Setup Steps
Minimum
Compressor
On Time
Compressor
Short Cycle
Delay
Cooling
Swing
Heating
Swing
Gas Auxiliary
for Heat Pump
Room
Temperature
Calibration
Filter
Change
Reminder
LCD Will Show
Adjustment Options
Factory Default Settings

8
MOUNT THERMOSTAT & BATTERY INSTALLATION
Mount Thermostat
Align the 4 tabs on the subbase with
corresponding slots on the back of the
thermostat, then push gently until the
thermostat snaps in place.
C
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W2

SET TIME
Set Time
9
Follow the steps below to set the day of the week and current time:
Press MENU
Press SET TIME
Day of the week will be flashing. Use the or key to select the current
day of the week.
Press NEXT STEP
The current hour is flashing. Use the or key to select the current hour.
When using 12-hour time, make sure the correct a.m. or p.m. choice is selected.
Press NEXT STEP
Minutes are now flashing. Use the or key to select current minutes.
Press DONE when completed
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7.
8.

10
SPECIFICATIONS & CONTACT INFORMATION
Specifications
Contact Us
The display range of temperature
The control range of temperature
Load rating
Display accuracy
Swing (cycle rate or differential)
Power source
Operating ambient
Operating humidity
Dimensions of thermostat
41ºF to 95ºF (5ºC to 35ºC)
44ºF to 90ºF (7ºC to 32ºC)
1 amp per terminal, 1.5 amp maximum all terminals combined
± 1ºF
Heating is adjustable from 0.4ºF to 2.0ºF
Cooling is adjustable from 0.4ºF to 2.0ºF
18 to 30 VAC, NEC Class II, 50/60 Hz for hardwire (common wire)
Battery power from 2 AA Alkaline Energizer batteries
32º to +105º (0º to +41ºC)
90% non-condensing maximum
4.7”W x 4.4”H x 1.1”D
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