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.
Operation
The dynamics of a r
adiant heating
syst
em differ from a typical
baseboard or forced-air heating
syst
em.
This is because r
adiant
syst
ems heat the mass and the
objects in the room. The Uponor
thermostat uses optimized c
ontr
ol
logic t
o control radiant systems.
Refer to the paragraphs below
f
or the two diff
er
ent modes of
operation — differential mode
and pulse width modulation
(PWM) mode.
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.
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
pr
event them fr
om aff
ecting
t
emper
ature readings.
Wiring the Thermostat
Follow the instructions below to
properly wire the thermostat.
Not
e:
All wiring must c
omply with
local electrical codes and standards.
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).
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
c
onsistent operation. If each room
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
1
8
A
WG,
2 Cond. Stranded
T
erminal
W
T
erminal
Rh
Push top
down to
separate
2.72"
(69mm)
5.00"
(127mm)
0.75"
(19mm)
2
2.5"
(63.5mm)
W
Rh
Rc
Y
G
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