CA1
CA1 is a room controller with one 0...10 V output or 3-point output. The unit is
suitable for zone control of heating or cooling. It has a built-in sensor, input for
external sensor and input for occupancy mode. The controller can operate in
either P or PI mode. It also has an input for change-over, which controls whether it
operates in heating or cooling mode.
Installation
Mount the controller in a place that reflects the overall ambient temperature in the
room. Open the front cover by depressing the plastic latchhook on the lower cover
edge.
Ambient temperature, running
0...+50°C
Ambient humidity
max 90% RH
Protection class
IP20
Wiring
Supply voltage
24 V AC ±15%, 50...60 Hz. Power consumption 2 VA.
Terminal 1
24 V AC
Terminal 2
24 V AC System neutral
Output 3-point
Terminal 3
24 V AC (G+) actuator common
Terminal 4
3-point, increase
Terminal 5
3-point, decrease
Output 0...10 V
0...10 V DC, 1 mA. Load impedance min. 10 KOhm.
Terminal 6
0...10 V DC
Terminal 7
Signal neutral
Sensor
The controller has a built-in sensor. If an external sensor is used, the jumper Ext/
Int (BY1) should be set in Ext position.
Terminal 7
Signal neutral
Terminal 10
Ext. sensor (NTC)
Occupancy mode control
The controller can be set to occupied or unoccupied mode:
Open contact = occupied mode
Closed contact = unoccupied mode
The base setpoint value is 22°C. It can be reset depending on the setting of the
potentiometer ”Unoccupied”, and is adjustable with a span of ±6°C.
Terminal 7
Signal neutral
Terminal 9
Occupancy input
Change-over
The CA1 change-over function input can be used to automatically control the CA1
mode of operation, i.e. heating or cooling function. Connect a sensor of type AB
Industrietechnik NTC or a potential free shorting switch between this terminal and
GND. Heating function is selected when terminal is shorted, and cooling function
when left open.
If a sensor is used, it should have a 0..30°C range. The temperature at the sensor
controls function. Mount the sensor so it monitors the supply water temperature.
When this temperature exceeds 22°C, the output function will change to heating
and if it drops below 18°C, the output function will change to cooling.
Note!
For proper function when using a change-over sensor the system must
have constant primary-water circulation.
If change-over is not used, the input
terminal should be shorted to GND when heating function is desired and left open
for cooling function.
Room controller, one 0...10 V output or 3-point output
Terminal 8
Change-over sensor or free shorting switch
Terminal 7
Signal GND
Settings
Setpoint:
Adjust with knob that extends from the lower right of the casing. The
knob setting can be mechanically fixed with a latchscrew located under the front
cover.
P-Band:
0.5...50 K (See figure 2)
Heating/Cooling function:
See the section ”Change-over function” above.
Pot. unoccupied mode (Factory setting = 3 (25°C, 19°C))
Position
0 1 2 3 4 5 6
Cooling setp.
22 23 24 25 26 27 28 °C
Heating setp.
22 21 20 19 18 17 16 °C
Jumpers
Jumper BY1
Right = Internal sensor (factory setting)
Left = External sensor
Jumper BY2
Closed = I-time is 2 min
Open = I-time is 20 min
(factory setting)
BY2 setting valid only when BY3 is set to PI-function.
Jumper BY3
Closed = P-function
Open = PI-function
(factory setting)
Setpoint calibration
Should the setpoint need calibration the knob rim with the scale can be detatched
from the hub and remounted in a new position. Grip across the rim and pull out at
the same time as maintaining an inward pressure on the hub (see figure below).
When remounting, make sure the parts snap together properly.
Indicators
CA1 has a green LED (PWR) which indicates supply power (see figure 2). There
is also a red LED (H) which indicated heating/cooling function. If the LED is lit,
the controller is set in heating function. If it is not lit, the controller is set in cooling
function. Occupancy mode is indicated by a green LED (Occ). If this is lit, the
controller is working in occupied mode. If it is not lit, the controller is working in
unoccupied mode.
EMC emissions & immunity standards
This product conforms to the requirements of the EMC Directive 2004/108/EC
through product standards EN 61000-6-1 and EN 61000-6-3.
RoHS
This product conforms to the Directive 2011/65/EU of the European Parliament
and of the Council.
Contact
AB Industrietechnik Srl
Via Julius Durst, 70 - 39042 Bressanone (BZ) - Italy
Tel. +39 0472/830626 - Fax +39 0472/831840
www.industrietechnik.it - [email protected]
Fig 1.
Measurements in mm
1
2
3
4
5
6
7
8
9
24 V AC supply
System neutral
24 V AC (G+) output, for actuator supply
3-point output increase
3-point output decrease
0…10 V DC control output
Signal neutral
Change-over input
Occupancy input
External sensor
10
Fig 2.
11870 MA
Y 14
BY2 BY3
BY1
P-band
PWR
Unocc. mode
Occ
H
IMPORTANT: Read these instruc-
tions before installation and wiring
of the product
INSTRUCTION
INSTRUCTION
