Swegon 20210201, Technical Manual

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Functions
There are a variety of functions built into the CONDUCTOR W4:
•
Exercising of valves
• First open
• 0-point calibration
• Frost protection
• Change over 2-pipe.
• Change over 4-pipe
• Night cool
• Time-set setpoint restoration
• Cold draught protection
• Digital airflows
• Digital Occupancy
• Commissioning, Air/Water
• Two-step heating
• Relay function
Exercising of valves
The function involves regularly exercising the water valves by utilising
automated functions in order to prevent them from becoming sluggish or
jamming. During the exercising period, all the valves that are wired to the
controller are opened for a maximum of 6 minutes and are then closed.
The valves for the cooling system are exercised first. Then the valves for the
heating system are exercised.
First open
The function means that the water valves are open when the system is
installed, which makes it easier to fill, pressure test and vent the water
system.
The function will be automatically disabled after the actuator has been
energized for approx. 6 minutes. A clicking noise will be heard when the
valves and the dampers change over to the NC mode (=normally closed)
and the normal control function is enabled.
Zero Calibration
Zero calibration of the pressure sensors connected to the RE: The dampers
are closed and a calibration signal is transmitted to the pressure sensor, after
which the RE returns to the relevant operating mode.
The time interval is set with the appropriate system parameter and is
specified in hours.
Frost protection
The function involves the following: Heating operation is started at a
predefined room temperature in order to counteract the risk of damage that
otherwise can arise due to freezing.
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20210201 Swegon reserves the right to make design changes.
CONDUCTOR W4