Note: This Appliance Must Be Earthed
4.7 ELECTRICAL CONNECTIONS
Fig. 4.7
A23 ....Alpha external heat pump
A30 ....Smartech boiler receiver
B9 ......DHW inlet sensor (optional)
R ........120 Ohm resistor
1 ........Power supply
2 ........Configurable relay
The connection between the boiler and the external heat pump must be made as shown in Figs. 5.14 and 5.15.
Specifically, a connection (2 BUS cables) must be provided between the Smartech boiler receiver unit and the external heat
pump, observing the polarity. The receiver must also be connected (4 wires) to the terminal board of the boiler.
The fitting and connection of the receiver (Fig.4.8) is necessary for the operation of the hybrid heat pump and for programming
its settings.
Alpha E-Tec Hybrid - General Information
A23
A30
B9
Max 2A - 230 VAC
230V AC
50 Hz
Configurable
output
L
N
L
N
A
B
2
5
6
1
1
2
44
41
38
48
X3 D-
X3 D+
X2 OT
X2 OT
X1 Bl
X1 Br
D-
D+
R
BUS
CLOU
D
PWR
BLE
RESET
Br
Bl
Power pack
Receiver
Fig. 4.8
11
