25
MYDENS
COSMOGAS
5 - INSTALLATION
5.15 - Connection and setting of the
appliance in cascade.
l
Only "A" or "C" model appliances can be connected
in cascade.
This appliance can be connected in cascade including up to
a maximum of 8 devices. The hydraulic connection diagram
is shown in Figure 22. Other types of hydraulic connections
can be performed (ask the manufacturer for the reference
diagrams). The cascade is managed by the control board in
the appliance that will be defined here and then referred to
as the “MASTER”.
To connect the appliances in a cascade, proceed as
follows:
1. - Set up the hydraulic installation (Figure 22);
2. - Set up the electrical installation (Figure 23);
3. - Use a bipolar cable, with a minimum cross-section of
1,5 mm²;
4. - The maximum length allowed is 20 metres, for lengths
exceeding 100 metres use a shielded cable with shield
earthing;
5. - Set up the BUS A-LINK connection;
6. - Connect the cascade temperature sensor;
f
WARNING!!! Cables being subjected to a very
low safety voltage (24 VDC), so they must flow in
wires different from the 230 VAC power supplies.
7. - Connect the power supply of each appliance;
8. - Set switch S4 to ON position in the MASTER appliance;
9. - Set switch S4 to OFF position on all SLAVE appliance
in the cascade;
10. - Access the MASTER appliance (where the cascade
probe has been
connected) and set the following parameters:
-
0911
=
4
(MASTER show the cascade
temperature);
-
2035
=
0
(DHW off);
-
2117
=
3
(Heat exchanger flow sensor);
-
2141
=
for 24 and 34 models = 1
for 60 model = 3,4
(Rated heat exchanger water flow rate);
-
4184
=
1
(Module logical address);
-
4147
at the value of the number of modules in
cascade (MASTER included);
11. - Access the next appliance which will become the first
SLAVE and set the following parameters:
-
2001
=
0
(Constant temperature adjustment);
-
2117
=
3
(Heat exchanger flow sensor);
-
2141
=
for 24 and 34 models = 1
for 60 model = 3,4
(Rated heat exchanger water flow rate);
-
4184
=
2
(Module logical address);
12. - Access each of the following appliances, repeating the
instructions of the previous point, considering that the
parameter
4184
must be increased by one unit for
each additional appliance;
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- When the slave appliance is correctly connected to
the
master, the radiator symbol (“E" Figure 51) disappears
from the display.
- The cascade temperature must be set with the buttons
on the heating side.
- If "MASTER" switches off or communication with SLAVE
is lost, the SLAVE go into stand-by.
- If "MASTER" loses communication with one of the
SLAVES,
Atte200
appears on the MASTER.
