20
| EN
AMBERAIR COMPACT S-CX v2023.3
4.16.4. EXTERNAL PREHEATER (COIL3)
For AmberAir Compact units it is available to connect electrical or water preheater.
These components are controlled with DO and 0-10V outputs. When digital output EX2 DO11 activates, the external device (electrical preheater
or water circulation pump) should start. When digital output deactivates, the external device should stop.
Analog output EX1 AO1 electrical preheater or water valve actuator control signal. It sets the needed value for heating the external device.
The electrical preheater automatic protection (AT1) thermostat connects to EX1 DI1 input. Its manual protection (RT1) thermostat connects to
EX1 DI2 input.
The water preheater return water temperature sensor connects to EX1 AI5 input.
DRAWN BY
CHECKED BY
SIGNATURE
DUTIES / NAME
DATE
UAB"SALDA"
Drawing #
Book #
APPROVED BY
1
2
3
4
5
6
7
8
9
10
EI O. Drąsutis
EI D. Aleksandravičius
MCB Connections wired by the user
Electric Preheater
Connections principal scheme
1
01
2023-03-27
2023-03-27
2023-03-27
X42:
1
- D
O1
1
X42:
2
- N
(L
1)
X42:
3
- P
E
-N3
EX2 V1.0
X21:
1
- D
I1
X21:
2
- +1
2V
DC
X21:
3
- D
I2
X21:
4
- +1
2V
DC
-N2
EX1 V2.0
X24:
1
- G
ND
X24:
2
- A
O1(
0-
10
VD
C)
-N2
EX1 V2.0
PE
L1
L2
L3
AT1
AT1
RT1
RT1
GND
0-
10
V
-PE3
Preheater power line must be connected to power source
outside AHU using apropriate protection, according to existing regulations
-K3
A1
A2
1
2
01-3-4
3
4
01-3-4
5
6
01-3-4
13
14
-K3
-L
1
-L
2
-L
3
1
2
3
4
5
6
-Q5
-K3
01-7-4
1
2
3
4
5
6
-PE
+CB
+UC
Preheater
Fig. 4.16.4.1 External electrical preheater connection
