Pro1 Technologies T621-2 User manual

T621-2
Installation Manual
Pro1 Technologies
Toll Free : 888-776-1427
Web: www.pro1iaq.com
Hours of Operation: M-F 9AM - 6PM Eastern
Thermostat Application Guide
Description
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 Furnace
Cool Only Systems
Millivolt
No
No
Yes
Yes
No
No
No
No
No
Power Type
Battery Power
Hardwire (Common Wire)
Hardwire (Common Wire) with
Battery Backup
Table of Contents
Specications
Installation Tips
Thermostat Quick Reference
Wiring
Wiring Diagrams
Technician Setup
Page
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.
Una version en español de este
manual se puede descargar en
la pagina web de la compañia.
Rev. 1809
U.S. Registered Trademark. Patents pending
Copyright 2017 All Rights Reserved.
Specications
The display range of temperature ... 41˚F to 95˚F (5˚C to 35˚C)
The control range of temperature.... 44˚F to 90˚F (7˚C to 32˚C)
Swing (cycle rate or dierential) ...... Heating is adjustable from 0.2˚ to 2.0˚
Cooling is adjustable from 0.2˚ to 2.0˚
Power source ...........................................18 to 30 VAC, NEC Class II, 50/60 Hz
for hardwire
Battery power from 2 AA Alkaline
batteries
Operating ambient ............................... 32˚F to +105˚F (0˚C to +41˚C)
Operating humidity .............................. 90% non-condensing maximum
Dimensions of thermostat ................. 4.7”W x 4.4”H x 1.1”D
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.
Battery Installation
Battery installation is recommended even if thermostat is hardwired
(C terminal connected). When thermostat is hardwired and batteries
are installed, the thermostat will activate a compressor delay of 5
minutes when the thermostat detects a power outage from the
hardwired power supply.
Important:
High quality alkaline batteries are recommended.
Rechargeable batteries or low quality batteries
do not guarantee a 1-year life span.
Insert 2 AA
Alkaline batteries
(included). High
quality alkaline
batteries are
recommended.
Simple
operating
instructions
are found
on the back
of the
battery
door.
Installation Tips
2-3
4
5
6
7-8
1
Installation Tips Thermostat Quick Reference
Getting to know your thermostat
Fan switch
System switch
Easy change battery door
Temperature setpoint buttons
LCD
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 screen
will only show the low battery indicator but
maintain all functionality. If the user fails to
replace the batteries after an additional 21 days
(days 22-42 since rst“low battery” display) the
setpoints will change to 55˚F (Heating) and 85˚F
(Cooling). If the user adjusts the setpoint away
from either of these, it will hold for 4 hours
then return to either 55˚F or 85˚F. After day 63
the batteries must be replaced immediately to
avoid freezing or overheating because the
thermostat will shut the unit o until the
batteries are changed.
Important
Removing The Private
Label Badge
Gently slide a screwdriver into the
bottom edge of the badge. Gently turn
the screwdriver counter clockwise. The
badge is held on by a magnet in the well
of the battery door. The badge should pry
o easily. DO NOT USE FORCE.
About The Badge
All of our thermostats use the same universal magnetic badge. Visit the
company website to learn more about our free private label program.
=
Displays the
selected setpoint
temperature.
System Operation
Indicators:
ON will display when
the COOL, HEAT or
Emergency Heat is on.
NOTE: The
compressor
delay feature is active
if ON is ashing. The
compressor will not
turn on until the 5
minute delay has
elapsed.
Low Battery Indicator:
Replace batteries when
indicator is shown.
Indicates the current
room temperature.
Subbase Installation
The thermostat should be installed approximately 4 to 5 feet above the
oor. Select an area with average temperature and good air circulation.
• 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
Wall Locations
Vertical Mount
Horizontal Mount
For vertical mount put one screw on the top
and one screw on the bottom.
For horizontal mount put one screw on the
left and one screw on the right.
All of our 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.
Pick an installation location that is easy for
the user to access. The temperature of the
location should be representative of the
building.
Installation Tip
Mercury Notice
Do not install
thermostat in locations:
Failure to disconnect the power before
beginning to install this product can
cause electrical shock or equipment
damage.
Installation Tip:
Electrical Hazard
Temperature
C
F
ON
+1
Set At
+1 will appear in
the display when
the auxiliary heat
is active.
Magnet in door
Use the bevel on lower ridge
P.O. Box 3377
Springeld, MO 65808-3377

Wiring
Caution:
Electrical Hazard
All components of the control
system and the thermostat
installation must conform to
Class II circuits per the NEC Code.
Warning:
Do not overtighten terminal
block screws, as this can
damage the terminal block.
A damaged terminal block
can keep the thermostat
from tting on the subbase
correctly or cause system
operation issues.
Installation Tip
Max Torque = 6in-lbs.
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 nonammable insulation into
wall opening to prevent drafts.
1.
2.
3.
Terminal Designations
C
OHeat pump changeover valve
energized in cooling
Heat pump changeover valve
energized in heating
W2 Auxiliary heat relay -Stage 2 heat
RTransformer power
GFan relay
YCompressor relay - Stage 1
heat and cool
Wiring Tips
C Terminal
The C (common wire) terminal does
not have to be connected when the
thermostat is powered by batteries.
Wire Specications
Use shielded or non-shielded 18-22
gauge thermostat wire.
Failure to disconnect the power
before beginning to install this
product can cause electrical shock
or equipment damage.
B
Common wire from system transformer
Wiring Diagrams
Technician Setup Technician Setup
This thermostat has 4 dierent setup congurations. To setup the
thermostat for your particular application:
1. Select COOL, HEAT, EmH, or OFF with the system switch.
2. Press and hold the + and - buttons together for 3 seconds. This
3 second delay is deigned so that homeowners do not accidentally
access the installer settings.
3. Use the + and - to change settings. Note: When you want to exit
the Technician Setup options select OFF using the system switch.
Compressor Short Cycle Delay
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 o. Default setting is ON. Selecting OFF with the jumper pin will remove this
delay.
Tech Settings
O
This feature allows the installer
to change the calibration of the
room temperature display. For
example, if the thermostat reads
70 degrees and you would like it
to read 72 then select +2.
Room
Temperature
Calibration
(Select
System OFF)
You can adjust the room
temperature display to read
4˚above or below the factory
calibrated reading.
Cooling
Swing
(Selecting
System COOL)
0.8
The swing setting often called
“cycle rate”, “dierential”or
“anticipation”is adjustable. A
smaller swing setting will cause
more frequent cycles and a larger
swing setting will cause fewer
cycles.
The cooling swing setting
is adjustable from 0.2˚ to
2˚. For example: A swing
setting of 0.5˚will turn the
cooling on at approximately
0.5˚ above the setpoint
and turn the cooling o at
approximately 0.5˚ below
the setpoint.
The swing setting often called
“cycle rate”, “dierential”or
“anticipation”is adjustable. A
smaller swing setting will cause
more frequent cycles and a larger
swing setting will cause fewer
cycles.
The heating swing setting
is adjustable from 0.2˚ to
2˚. For example: A swing
setting of 0.5˚will turn the
heating on at approximately
0.5˚ below the setpoint
and turn the heating o at
approximately 0.5˚ above
the setpoint.
Tech Settings Adjustment Options Default
LCD Will Show
EEmergency heat relay
NOTE: In many systems with no emergency heat relay a jumper can be installed between E and W2.
Power supply
Use either O or B terminals for changeover valve.
Optional 24 VAC common connection when thermostat is used in battery power mode.
Field-supplied jumper
R
Y
C
E
G
W2
O
B
COMPRESSOR
RELAY
FAN RELAY
AUXILIARY
HEAT
COOL CHANGE
OVER VALVE
HEAT CHANGE
OVER VALVE
C
R
L2
L1(HOT)
2H/1C Heat Pump System
Typical 2H/1C Heat Pump System with seperate emergency heat
R
Y
C
E
G
W2
COMPRESSOR
RELAY
EMERGENCY
RELAY
AUXILIARY
HEAT
COOL CHANGE
OVER VALVE
HEAT CHANGE
OVER VALVE
O
B
C
R
L2
L1(HOT)
FAN RELAY
Note: In many systems
with no emergency heat
relay a jumper can be
installed between E and W2.
CA 0
Heating
Swing
(Selecting
System HEAT)
08
08 0.8
When ON, this feature turns o
the Y terminal 45 seconds after
the second stage of heat (W2)
turns on. When OFF, it allows 1st
stage (Y) and 2nd stage (W2) to
run together. (Electric for Aux)
Selectable ON or OFF.
This option should be ON
for DUAL FUEL applications
that use a gas furnace for
auxiliary heat.
Gas Auxiliary
for Heat Pump
(Selecting
System EMH)
OF OFF
6A
Swing Setting Tip
Temperature swing, sometimes called dierential or cycle rate, can be customized for
this individual application. For most applications choose a swing setting that is as
wide as possible without making the occupants uncomfortable.
Reset button.
Select For Cwith the
jumper pin.
F- Fahrenheit
C- Celsius
Select delay on
or o with the
jumper pin.
RH/R
G
Y
C
O
E
W2
RESET
B
C
F
DELAY
RH/R
G
Y
C
O
E
W2
RESET
B
C
F
DELAY