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Variable air volume controllers
Shutdown, the controller returns to Bypass.
Forced ventilation
Argus has a built-in function for forced ventilation. A short
press on the Occupancy button activates output DO1 for
example for a damper.
Change-over function
RC-CDO has an input for change-over that automatically
resets output UO1 to operate with heating or cooling
function. The input can be connected to sensors of type
PT1000 and have the sensor mounted so that it senses
the temperature on the supply pipe to the coil.
When the temperature exceeds 22°C, the output function
is set to heating and when the temperature drops below
18°C, the output is set to cooling. As an alternative, a
potential-free contact can be used. When the contact is
open the controller works with the heating function and
when it is closed, with the cooling function. To ensure
satisfactory functioning using sensor, the system must
have continuous primary circuit circulation. When the
change-over function is not used, the input must be left
disconnected.
Setpoint
In Occupied mode, the controller operates from a heating
setpoint (FS = 22°C), or a cooling setpoint (FS = 24°C)
that can be changed using the INCREASE and DECREASE
buttons. Pressing on INCREASE increases the current
setpoint by 0.5°C with each press up to the max. limit
(FS = +3°C). Pressing on DECREASE decreases the current
setpoint by 0.5°C with each press down to the min. limit
(FS = -3°C).
Switching between heating and cooling setpoints is done
automatically in the controller depending on the heating
and cooling requirement.
Built-in safety functions
RC-CDO has an input for a condensation detector which
prevents condensation. The controller also has frost
protection. It prevents frost damages by ensuring that the
room temperature does not drop below 8°C when the
controller is in Off-mode.
Actuator exercise
All actuators are exercised. The exercise takes place at
set intervals in hours (FS=23 hours interval). An opening
signal is sent to the actuator for as long time as the run
time has been configured. Then a closing signal is sent for
as long time and the exercise is finished.
Configuration and supervision with Argus tool
©
RC-CDO is pre-programmed on delivery, but can be con-
figured using Argus tool
©
.
Argus tool
©
is a PC-based program that makes it possible
to configure and supervise an installation, and change
settings, via a clear and easy user interface.
The program can be downloaded free of charge from
Argus’s homepage
RS485
EX8282
RS485
EX8282
RS485
EX8282
EXO4
TCP/IP
TCP/IP
RC-C...
RC-C...
RC-C...
HUB
Application examples
SCADA
RS485 (EXOline alt. Modbus)
Window
contact
IR
ROOM 2
ROOM 3
ROOM 4
ROOM 1
Condensation detector
Temp
