6
ELECTRICAL INSTALLATION
Installation, user and maintenance manual – AY Condensing line, AY Series
37
Make sure the ground cable is longer than the live cables. 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. Do not use gas pipes to ground
electrical appliances.
A wiring error, as well as impeding the correct operation of the appliance, could also damage the electrical apparatus that
it contains.
The "NO Contact" terminals are no voltage contacts with maximum power capacity of 700 W. These contacts control the
circulator shutdown delay (2 minutes after appliance shutdown). Check the position of jumper "J2", as follows:
4.
Locate, on the appliance’s controller (SCH), jumper "J2" on the S70 (bottom right, below the "NO Contact" contacts) and make
sure that it is set as shown in detail "A" (jumper closed) of the figure.
5.
On completion, restore the appliance to its fully assembled condition.
Figure 6�5 – Direct control of independent circulator
Example of "circulator-appliance" electrical connection with single-phase circulator (230 V AC), power less than 700 W.
LEGEND
SCH
controller (AY10+S70)
NO contact system water circulator control
terminals (voltage free NO contact,
maximum power absorption 700 W)
J2
system water circulator control jumper
A
detail of "closed" jumper
MC
230 V AC power terminal block
PW
system water circulator (230 V AC;
<700 W)
If the circulator’s power is equal to or greater than 700 W, the installation technician must make the following modifica-
tions (see figure):
▶
(point 3) <<... make the connections as shown in the example, but installing a relay for the control of the pump, managed via
NO-contact>>. Then:
▶
(point 4) <<Locate and open jumper "J2" as shown in detail "A" (jumper open) in the next figure 6.6
→
39>>.
Fit the relay inside the external electrical panel provided by the installation technician.
The insertion of relays or other electrical components inside the General Electrical Panel of the appliance is not permitted.
Do not activate the appliance if the hydraulic plant has not been filled.
CONNECTIONS FOR CONTROLLING A SHARED CIRCULATOR
This connection applies to hydraulic circuits which have a single primary circuit circulator for multiple appliance (shared circulator)
installed on the plant. For example: 1 circulator/3 appliances.
In such cases, a three-phase water circulator (400 V AC) may be required.
The choice of water circulator depends on the number of appliances being served as the specifications of the system (water
flow rate, head, etc.) which are determined during the design process. Always follow the specifications of the system design
documentation.
The following procedure refers to Figure 6.6
→
39, which gives an example of a three-phase circulator (400 V AC) connection.
To make the circulator-appliance connection, proceed as follows (references to Figure 6.6
→
39):
You will need: the appliances hydraulically connected; water circulator in line with the system specifications (e.g.: three-
phase/400 V AC); external electrical panel configured by the installation technician. Necessary equipment and materials.
Make sure that the external electrical panel is equipped with a power switch (4-pole) with suitable motor thermal switch, a
secondary SELV safety transformer and control relay.
