Alfa Laval AquaFirst
Installation, service and operating instruction
15
4.3
Wiring details
4.3.1
Power terminal on PCB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
N
Ph
╧
N
Ph
╧
N
Ph
╧
N
Ph
╧
N
Ph
╧
230V Main
Power supply
Pump 1
(Primary)
Pump 2
(Primary)
Pump 3
(Secondary)
Pump 4
(Secondary)
Control box power supply: 230V 50Hz + Ground terminals 1,2 and 3.
Terminals 4 to 15 are dedicated to P1, P2, P3, P4 230V power supply.
Do not exceed 3A per pump.
4.3.2
230V 3 points actuator terminals on PCB
16
17
18
19
N
Ph
+
-
230V 3 points actuator
Opening of the actuator is made sending 230V pulses between terminals 16 (N) and 18 (+).
Closing of the actuator is made sending 230V pulses between terminals 16 (N) and 19 (-).
Terminal 17 (permanent Phase) can be used with return to zero (RTZ) actuators.
3 points 230V and 0-10V signals (or pulses) are sent continuously even if they are not wired.
4.3.3
Low voltage outputs on PCB
20
21
22
23
24
25
26
27
28
29
0V
S/S
0V
S/S
NO
C
NC
24Vac
AO1 (0-10V)
0V
Pump 1
Start / Stop
N/A
Pump 2
Start / Stop
N/A
Relay 1 contact
NO or NC to
choose
0-10V DC actuator, 24V AC 5VA power
supplied
0V is common on both signals
4.3.4
Low voltage inputs (contacts / Sensors) on controller
31
33
35
36
37
40
41
42
46
47
GND
Bi1
Ipso
P3
Ipso
P4
GND
UI1
S1
UI2
S2
UI3
S3
Ipso
P1
Ipso
P2
Common
Remote
Contact*
Secondary
pump(s) default
input contact(s)*
Common
Temperature
sensor(s)
input(s)*
Secondary
pump(s) default
input contact(s)*
*For each of these inputs / outputs, the second wire must be connected to the common terminal
37 or 31 as per available space.
There is no polarity on all contacts and temperature sensors.
Temperature sensors’ inputs except S1 are already wired. To add a temperature sensor, remove
existing wire from the terminal and isolate its end. Connect the
sensor’s wire instead and its
second wire to common terminal, 31 or 37.