Technical data
Installation, user and maintenance manual – GAHP-A
43
5.2 HOW TO CONNECT THE APPLIANCE ELECTRICALLY
Before making the electrical connections, make sure that work is not carried out on live
elements.
You will need: the appliance in its permanent location.
Prepare a cable of the FG7(O)R 3Gx1.5 type for the power supply to the appliance.1.
Connect the appliance to the mains (with the cable indicated in point 1), tting in 2.
proximity to the mains a general external bipolar circuit breaker (see detail «GS» in
Figure 5.5 Electrical wiring diagram → 43) with 2 type T 5A fuses or a 10 A magne-
tothermic switch.
Make the electrical connection in such a way that the ground wire is longer than 3.
the live wires. In this way it will be the last wire to be pulled away if the mains cable
should accidentally be pulled, and will thus guarantee the ground connection.
The electrical safety of the appliance is guaranteed only when it is correctly connected
to an ecient grounding system, executed in accordance with current safety regulations.
Do not use gas pipes to ground electrical appliances.
Figure 5.5 – Electrical wiring diagram
Example of connection of appliance to 230 V 1 N - 50 Hz electricity supply
LEGEND
TER terminal board
L
phase
N neutral
Components NOT SUPPLIED
GS
general switch
5.3 TYPE B DDC
This paragraph illustrates the operations to be performed when one or more appliances
are connected to a Direct Digital Controller (DDC). In particular:
What is the CAN bus cable.1.
How to connect the CAN BUS cable to the appliance's controller2.
How to connect the CAN BUS cable to the DDC.3.
How to connect the DDC.4.
How to connect the plant water circulation pump.5.
For specic information regarding the DDC, refer to the specic manuals supplied with
it.
The appliance and the DDC communicate with each other via a CAN bus network.
The CAN bus network is characterized by a series of elements (appliances or DDCs) called
nodes, connected to each other by a three-wire cable. The nodes are of two types: termi-
nal nodes and intermediate nodes.