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Expansion module
Main characteristics
• Adds six channels and actuator outputs to an existing base unit
• Easy plug-in installation on existing base unit with additional
wiring needed
• Register up to six extra thermostats to the system
• Electronic control of actuators
• Valve exercise
Important! Only one expansion module is supported
per controller.
Components
A
Figure 1-8: Expansion module components
Item
Description
A
Wireless Base Unit Expansion Module (A3801160)
B
Mounting bracket
C
Mounting hardware
Uponor actuators
Uponor actuators are mounted on top of the manifold valves
and operated using either on/off signals or pulse width
modulation (PWM) signals.
On/off control
When installing a system with on/off control, manual balancing
of the system is required.
As soon as the temperature measured at a thermostat is lower
(heating mode) than the setpoint temperature, a demand to
change the room temperature is created and sent to the base
unit. The base unit will open the actuators according to current
settings. Once the set temperature is reached, this information
is sent and the actuators are closed. The indicator window on
the actuator shows, with a white bar, how much it is opened.
If the window is completely filled with white it is fully opened,
no white bar shown means the actuator is closed.
Time to open and close an actuator is one minute.
4 | uponorpro.com
B
C
PWM control
PWM control is used when the Autobalancing function is active.
When installing a system with PWM control, the system is
balanced automatically.
A
Figure 1-9: Actuator valve status
A Actuator has closed the valve (empty indicator)
B Actuator has opened the valve (white indicator)
Autobalancing
The base unit can operate the actuator outputs by either on/off
signals or by Autobalancing (on by default), using PWM signals.
Autobalancing is a function where the system calculates the
actual energy need of single rooms and adapts the output
power of each loop to its length. This means a short loop
might get 20% on time while a long loop might get about 60%.
The automatic balancing continues through the seasons
and throughout the household's changing lifestyle and
usage patterns, removing the need of manual balancing.
This gives more even floor temperatures and faster system
reaction times with lower energy consumption than any
standard on/off system.
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 sensors and setpoint values.
MicroSD card
The system uses a microSD card for cloning automatic backup
(settings and thermostat registration data), manual restoration
of backup, data logging (room data, controller data, system data
and events) and upgrading software.
B
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Troubleshooting
