RADIANT HEATING SYSTEMS
HEAT-ONLY THERMOSTAT
INSTRUCTION SHEET
Technical Data
Operating 24VAC +/- 10%
Voltage
Maximum Load
Display Range 38°F to 99°F (2°C to 37°C)
Setting Range 38°F to 99°F (2°C to 37°C)
Minimum Limit 38°F (2°C) to maximum limit
Maximum Limit Minimum limit t
Units User
Memory Permanent settings and
Freeze Protection Activation at 38°F (3.3°C)
Resolution 1° displayed, 0.25° calculated
Temperature Shipping and storage —
Ranges
Humidity 20 to 90% non-condensing
Size 5" H x 2.72" W x 0.91" D
1.3 Amps at 24VAC
4 x MVA
(part number A3020522)
6 x TVA (part number
A3010522, four-wire)
6 x TVA (Canadian model only,
part number A3020416,
two-wire)
68°F (20°C) default setting
50°F (10°C) default
minimum setting
o 99°F (37°C)
86°F (30°C) default
maximum setting
able
onfigur
-c
Fahrenheit or Celsius
mode without power
De-activation at 39°F (3.8°C)
14°F to 158°F, (-10°C to 70°C)
Operation —
32°F to 104°F, (0°C to 40°C)
Overview
The Uponor heat-only thermostat
(A3030101) is designed for hydronic
heating applications.
The thermostat is power-sharing,
meaning it receives power for
operation by sharing voltage
with the connected wiring. This
eliminates any need for a third wire
or batteries, making the thermostat
simple to install, wire and service.
Note: The thermostat works
effortlessly with other Uponor
components. However, some
commonly used third-party devices
(e.g., relays, zone valves, etc.) may
have compatibility issues with the
thermostat. If connecting the
thermostat to a third-party control
device, refer to that device’s
installation instructions for specific
information regarding operation
with a power-sharing thermostat.
The Typical Wiring Schematics
section in this instruction sheet
features the most common wiring
applications. F
contact Technical Services.
Uponor U.S.: (800) 321-4739
Uponor Canada: (888) 994-7726
or additional help,
Tools Required
Small, flathead scr
•
Phillips scr
•
mounting hardware)
e stripper and cutt
Wir
•
ewdriver
ewdriver (f
or
er
Installation
Prior to installing the Uponor
thermostat, follow the instructions
below.
1. Thoroughly read this instruction
sheet to understand the proper
procedures for installation and
operation. Failure to do so
could result in damage to the
thermostat or its connected
equipment, and can also
create a safety hazard.
2. Ensure the function and rating
of the thermostat is suitable for
the application.
3. Only experienced and trained
professionals familiar with lowvoltage wiring should attempt
to install the thermostat.
4. Uponor recommends using
18AWG LVT wiring for all
low-voltage connections
ed by local
egulat
(as r
building codes).
Placing the Thermostat
e you plac
Wher
is extremely important. Install the
thermostat appr
(1.75 met
a smooth, flat surface. Avoid
mounting the thermostat in
ollowing locations.
the f
• Near or around windows
On outside walls
•
• Near fireplaces
•
In the corner of a room
• Behind doors
• On interior walls susceptible
to solar gains
• Near stoves, lamps,
televisions, etc.
• Damp areas
e the thermostat
ely five f
ximat
o
ers) above the floor on
eet
Mounting the Wall Plate
The thermostat case can mount to
a standard electrical wall box or
most wall surfaces using suitable
hardware. To properly mount the
wall plate, follow the instructions
below.
Push top
down to
separate
1. Separate the front and back
plates of the thermostat by
gently applying downward
pressure on the front plate to
separate the front plate from
the back plate.
2. Pull the thermostat wire through
the round opening in the back
plate.
3. Place the back plate against the
wall at the desired location to
cover the opening or electrical
wall box.
4. Align the holes of the back
plate to the holes in the wall or
electrical wall box, and attach
the plate with screws. If
mounting the plate to drywall,
use wall anchors and screws.
5. If the wall cavity behind the
thermostat is susceptible to
drafts (e.g., from a return-air
plenum or an uninsulated wall),
plug and seal any openings to
ecting
event them fr
pr
ature readings.
emper
t
om aff
Caution: Disconnect
electrical power to the
system to prevent electrical
shock and damage.
1. Remove
1
⁄4" of wire insulation
from the wire ends. Ensure the
bare wires are clean and free
of corrosion.
2. Route the wires to the terminal
blocks and place the end of
the wires in the correct wiring
locations.
Note: The heat terminals (Rh and
W) are not polarity sensitive.
Mounting the Thermostat
to the Wall Plate
To mount the thermostat to the wall
plate, follow the instructions below.
1. Place the tabs at the bottom
of the front enclosure into the
grooves at the back of the
wall plate.
2. Check the alignment between
the two components.
3. Apply pressure to the top of
the thermostat until you hear
a click.
2.72"
(69mm)
5.00"
(127mm)
Differential Mode
When the room temperature falls
1°F (0.5°C) below the desired room
setting, the control devices wired to
the thermostat activate.
Pulse Width Modulation
(PWM) Mode
When the room temperature is
between 1 to 3°F (0.5 to 1.5°C)
below the desired room setting, the
thermostat manages the application
of heat by varying the on-and-off
cycles (PWM). The on-and-off
times vary depending on the
difference between room and
desired temperatures — the further
away, the greater the on time. This
prevents the room temperature
from rising above the desired
temperature. The heating system
will run continuously at temperature
differences greater than 3°F
(1.5°C).
Note: In PWM mode, the heating
equipment may temporarily turn
off even when the heating icon is
flashing (indicating a call for heat).
2.5"
(63.5mm)
0.75"
(19mm)
erminal
T
W
erminal
T
Rh
Rc
Rh
W
Operation
Y
G
The dynamics of a r
syst
baseboard or forced-air heating
syst
syst
objects in the room. The Uponor
thermostat uses optimized c
Wiring the Thermostat
Follow the instructions below to
properly wire the thermostat.
e:
Not
All wiring must c
local electrical codes and standards.
2
omply with
logic t
Refer to the paragraphs below
f
operation — differential mode
and pulse width modulation
(PWM) mode.
2 Cond. Stranded
adiant heating
em differ from a typical
This is because r
em.
ems heat the mass and the
o control radiant systems.
ent modes of
or the two diff
er
WG,
A
8
1
adiant
ontr
Digital Filtering
The thermostat also features digital
filtering, meaning the thermostat
continuously measures the room
temperature and employs a digital
filter to create a stable reading and
onsistent operation. If each room
c
ol
temperature reading displayed
as it is sensed, the temperature
shown would appear erratic and
inconsistent. The filtering technique
throws out sensor readings with
large differences from the displayed
temperature and then limits the
amount any individual reading can
affect the overall displayed reading.
This results in a smooth display and
operation.
Note: Due to filtering, the displayed
room temperature can take up to a
minute to change 1°F (0.5°C).
Important: This product
is not designed for use
with forced-air furnaces.
The thermostat conforms to
universal industry standards.
Uponor is not responsible
for damages resulting from
mis-application or misuse
of its products. Install the
thermostat with the power
onnected. Failure to
disc
do so can result in damage
to the thermostat.
Note: The Uponor thermostat
requires a minimum current to
operate correctly. A 1,000 Ohm,
0.5 Watt resistor is included in this
package and may be required for
operation of third-party devices.
Refer to the Typical Wiring
Schematics section for additional
information.
Setting and Adjusting
the Thermostat
All user functions operate via two
buttons (+ and –) located on the
front of the thermostat case.
Power Up and
Power Interruption
After completing all electrical
onnections and pr
c
the thermostat, apply power to the
system. The thermostat reading
automatically starts at 68°F (20°C)
in Heat mode, which is the default
temperature setting and mode.
The Uponor thermostat recalls
the previous temperature setting
and mode if power is int
When power is restored, the
thermostat’s reading will start at the
previous temperature setting and
the previous mode (Heat or Off).
operly mounting
errupted.
Normal Operation
The thermostat displays the current
room temperature measured by the
thermostat along with the mode of
operation. The following icons
indicate the mode of operation.
•
None — Thermostat is off
• Radiant panel — Heat mode
is active with no call for heat
•
Radiant panel with
lines flashing above
Heat mode is active with a call
for heat
—
Adjusting the
Temperature
The following instructions outline
how to adjust the temperature
setting. Pressing the + (increase
or top button) or – (decrease or
bottom button) changes the
desired room temperature setting.
1. Press either button to enter
the setting program mode.
2. The Heat icon will begin
to flash.
3. Press the + (top button) to
increase the room setting
and the – (bott
decrease the room setting. Press
and hold the button to rapidly
change the temperature setting.
4. The thermostat accepts the
new setting five seconds after
pressing the last button; then
the thermostat reverts to
displaying the current room
temperature.
Note: When the mode is set
to Off, you cannot change the
temperature setting.
om button) to
Changing Modes
(Heat and Off)
This thermostat does not use a
switch to change the mode from
H
eat to Off. Follow the instructions
below to change the modes.
1. Press both (+ and –) buttons
simultaneously to change
the mode.
2. Ensure the program bar is
flashing to indicate the
thermostat is in the
programming mode.
3. Press the + or – button to
change the mode of operation.
Using the + (top) button or the –
om) button changes the
(bott
otation sequence of the icons
r
or modes.
The following icons indicate
the mode.
•
None — Thermostat is off
• Floor icon — Heating mode
The thermostat accepts changes
five seconds after pressing the last
button, and then the thermostat
returns to normal operation
Note: The thermostat remembers
the previous operating mode and
settings af
er it is power
t
ed off.
Freeze Protection
The thermostat features automatic
low-temperature protection to
pr
event freezing. Regardless of the
e setting and mode (Heat
atur
emper
t
), the thermostat will activat
or Off
the heating circuit at 38°F (3.3°C)
eaches
e r
atur
emper
until the r
39°F (3.8°C).
this feature.
oom t
ou cannot disable
Y
e
3
Advanced Settings
The Uponor thermostat features
extra settings, which are accessed
via the Special Setting button on
the inside of the thermostat case.
When using this button, the
thermostat must be wired and have
power, but needs to be separate
f
rom the wall mounting plate.
Note: Uponor recommends only
qualified installers change these
settings. Improper adjustment of
these settings can result in incorrect
operation of the heating system.
Units
The Uponor thermostat is capable
of operating in either Fahrenheit or
Celsius. To change the units setting,
follow the instructions below.
Press the Special Setting
1.
on once.
butt
2. The display shows the units icon
(°F or °C).
3. Press the + (top) or – (bottom)
o change the units.
button t
4. The thermostat accepts the
change five seconds after
pressing the last button, and
then the thermostat returns
to normal operation.
Lower Setting Limit
Follow the instructions below to
set the lower limit of the allowable
temperature setting range.
1. Press the Special Setting
button three times.
2. The display shows the number 2
in the lower left of the display
and the temperature setting.
3. Press the + (top) or – (bottom)
button to increase or decrease
the lower setting limit of the
thermostat.
4. The thermostat accepts the
change five seconds after
pressing the last button, and
then the thermostat returns
to normal operation.
Note: Use the upper and lower
limit for public thermostat operation.
By setting these limits to the same
value, a user cannot change the
thermostat setting.
Typical Wiring Schematics
Sensor Reading
Calibration
This setting varies the reading
of the thermostat to overcome
installation-related issues.
1. Press the Special Setting button
and the + (top) button at the
same time.
2. The display shows a single digit
number and the set operating
units.
3. Press the + (top) or – (bottom)
button to increase or decrease
the sensor reading offset.
Positive numbers increase
the sensor reading; negative
numbers decrease the sensor
reading.
4. The thermostat accepts the
change five seconds after
pressing the last button, and
then the thermostat returns
to normal operation.
Important: Adjust the
sensor reading calibration
as a last resort after first
trying all other remedies.
Upper Setting Limit
Follow the instructions below to set
the upper limit of the allowable
temperature setting range.
1. Press the Special Setting
button twice.
2. The display will show the number
1 in the lower left of the display
and the temperature setting.
3. Press the + (top) or – (bottom)
button to increase or decrease
the upper setting limit of the
thermostat.
4. The thermostat accepts the
change five seconds after
pr
essing the last butt
then the thermostat returns
to normal operation.
, Printed in the United States
CA_5-06, Copyright © Uponor
HOThermostat_IS_USA
on, and
Uponor USA
8th Street West
4
1
5925
Apple Valley, MN 55124
Tel: (800)321-4739
(
:
ax
952)89
F
www.uponor-usa.com
:
eb
W
E-mail: learnmore@uponor-usa.com
409
1
-
1
Uponor Canada
655 P
egina, SK S4N 5N1
R
Tel: (888) 994-7726
Fax:
Web: www.uponor.ca
E-mail: inf
eet
ark Str
(800) 638-9517
o@uponor
.ca
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