External Preheater (Coil3) - Salda AMBERAIR COMPACT S-CX H Operation, Installation & Maintenance Instructions

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.
1 2
MCB Connections wired by the user
20 | EN
3 4
+UC
-PE
1 3 5
-Q5
2 4 6
1 3 5
-K3
2 4 6
01-7-4
-PE3
Preheater power line must be connected to power source
outside AHU using apropriate protection, according to existing regulations
Fig. 4.16.4.1 External electrical preheater connection
Electric Preheater
Connections principal scheme
5 6
+CB
-N2 -N2
EX1 V2.0 EX1 V2.0
Preheater
DRAWN BY
CHECKED BY
APPROVED BY
7 8
-N3
EX2 V1.0
A2
-K3
A1
-K3
01-3-4
1 2
3 4 01-3-4
01-3-4
5 6
13 14
DUTIES / NAME SIGNATURE
EI O. Drąsutis
EI D. Aleksandravičius
AMBERAIR COMPACT S-CX v2023.3
9
DATE
UAB"SALD
2023-03-27
2023-03-27
2023-03-27