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ESiEN09-06 A
W-, X-, Y-, Z-Control
Control Box EKEQ - CBV3
57
2.2
X-Control
Control of refrigerant temperature by means of an external device (DDC controller, 0-10 V
control).
Components for control:
DDC (field supply)
Air thermistor (field supply)
BRC1D (only for servicing)
++
Possibility for T
d
, T
s
or T
r
control
Flexibility in applications
--
Higher cost (DDC needed)
In case of X-control, a DDC-controller is needed to operate the unit. This DDC-controller is field
supply but in order to connect it to our ERQ-system, it is required that it emits a 0-10 VDC signal
towards the control box.
2.2.1 Different levels
Inside the control box, this 0-10 VDC signal is converted into a voltage level.
The output voltage increase gives the voltage at which the level increases.
The output voltage decrease gives the voltage at which the level decreases.
Example:
Room temperature = 20°C, set temperature = 25°C. Heating operation: DDC controller,
calculates the difference and sends a 3 VDC signal (fictive value) to the control box. This is
between 1,8 and 3,8 so in level 2. When the room temperature rises to 23°C, the DDC controller
detects a smaller temperature difference and will send out a higher signal, ex. 5 VDC. The
output voltage has increased so you have to use the highest line, indicating that you are now in
level 3. When the window is opened, the room temperature drops and the difference with the set
temperature is higher. The DDC sends a 1 V signal. According to the “output voltage
decreasing” line, we are now in level 1.
DDC
T
set
T
measured
0~10 V
output
10V
5V
0V
T
set
T = T
set
- T
measured
T
measured
= T
d
, T
s
or T
r
DDC
Output level
Level 1
Level 2
Level 3
Level 4
Level 5
Output voltage increasing
1.8
-->
3.8
-->
6.8
-->
8.8
-->
Output voltage decreasing
1.2
<--
3.2
<--
6.2
<--
8.2
<--
DDC
Control Box
X-control
0-10V
level 1
level 2
level 3
level 4
level 5
Summary of Contents for ERQ Series
Page 2: ......
Page 16: ...Combination Table ESiEN09 06 A 6 General Information...
Page 17: ...ESiEN09 06 A Specifications 7 1 Specifications 8 1 1 Outdoor Units 8...
Page 33: ...ESiEN09 06 A Function general Function 23 1 2 Operation Mode...
Page 58: ...Outline of Control ESiEN09 06 A 48 Function...
Page 71: ...ESiEN09 06 A Wiring Diagram of Control Box Control Box EKEQ CBV3 61 3 2 F box...
Page 109: ...Test Operation ESiEN09 06 A 100 Test Operation 1 2 2 Turn power on...