Functions - Uponor smatrix space Installation And Operation Manual

3.5

Functions

Uponor Smatrix Space is used to control a single zone in
an underfloor heating and/or cooling system in a house.
The thermostat registered to the controller is used to
control the actuator mounted on top of a 2-way valve
controlling the flow to the zone.
As soon as the temperature measured at a thermostat
is lower (heating mode) or higher (cooling mode) than
the setpoint temperature, a demand to change the
room temperature is created and sent to the controller.
The controller will operate the actuator according to
current control mode and settings. This will manage the
flow to the floor loops in the room and adjust the room
temperature. Once the set temperature is reached, this
information is sent to the controller and the demand is
met.
Comfort and ECO modes (T-168 only)
If the thermostat T-168 is connected to the controller,
it is possible to regulate the temperature setpoint
modes between three different temperatures. Available
modes is Comfort and ECO (economy). See example of
Comfort and ECO mode below.
Heating timer zone 1
Comfort
ECO
night morning
0 h 00 6 h 00 12 h 00
The diagram shows that the system delivers heating in
comfort mode in the morning and afternoon, but the
system enters ECO mode during night and in the middle
of the day, when the house normally is empty.
Low hysteresis temperature
Uponor uses a low hysteresis temperature for best
performance of the system. It is used for high control
accuracy by deciding when to start and stop heating
and cooling, based on information from the sensor and
setpoint value.
U P O N O R S M AT R I X S PA C E / S PA C E P L U S · I N S TA L L AT I O N A N D O P E R AT I O N M A N U A L
afternoon night
18 h 00 24 h 00
Heating fall back
If the connection to the thermostat is lost, the loop
cannot be regulated using the air temperature. The
controller then activates a fall back function and the
actuator is operated with a set interval.
The function is activated until the thermostat is
reconnected.
Heating/cooling offset (T-166 and T-168
only)
Uponor uses an offset temperature to adjust the
setpoints when switching between heating and cooling.
This improves the performance of the system and
reduces the need of manual setpoint adjustments when
switching between heating and cooling.
The default value is set to 2 °C and is used to increase
the setpoints when switching to cooling. When
switching back to heating, the value is used to reduce
the setpoint.
Relative humidity function (T-168 only)
To avoid condensation when having a cooling system, it
is recommended measuring the relative humidity (RH)
in the rooms. The relative humidity is measured with a
thermostat (with internal RH sensor).
Cooling is shut off for the system if the RH reaches a
"worst case level" of 80% in the thermostat.
Cooling will start again when the relative humidity falls
below 76%.
Real time clock (T-168 only)
To facilitate accurate scheduling and different timer
settings, the thermostat contains a real time clock.
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