ECONCEPT 51 A
41
EN
Two mixed heating circuits and one direct heating circuit
Check/Change parameter P02 of the "Transparent Parameters Menu" to
1
.
Change parameter P.02 of the "System Type Menu" to 1.
Change parameter P.09 of the "System Type Menu" to 1.
For the electrical connection and the zone system settings, refer to the "FZ4 zone regu-
lator" handbook
fig. 20
Two mixed heating circuits, one direct heating circuit and one DHW circuit with pump
Check/Change parameter P02 of the "Transparent Parameters Menu" to
2
.
Change parameter P.02 of the "System Type Menu" to 1.
Change parameter P.09 of the "System Type Menu" to 1.
For the electrical connection and the zone system settings, refer to the "FZ4 zone regu-
lator" handbook
fig. 21
3.4 Electrical connections
Connection to the electrical grid
B
The unit's electrical safety is only guaranteed when correctly connected to an
efficient earthing system executed according to current safety standards. Have
the efficiency and suitability of the earthing system checked by professionally
qualified personnel. The manufacturer is not responsible for any damage
caused by failure to earth the system. Also make sure that the electrical system
is adequate for the maximum power absorbed by the unit, as specified on the
boiler dataplate.
The boiler is prewired and provided with a Y-cable and plug for connection to the elec-
tricity line. The connections to the grid must be made with a permanent connection and
equipped with a bipolar switch whose contacts have a minimum opening of at least 3
mm, interposing fuses of max. 3A between the boiler and the line. It is important to re-
spect the polarities (LINE: brown wire / NEUTRAL: blue wire / EARTH: yellow-green
wire) in making connections to the electrical line. During installation or when changing
the power cable, the earth wire must be left 2 cm longer than the others.
B
The user must never change the unit's power cable. If the cable gets damaged,
switch off the unit and have it changed solely by professionally qualified person-
nel. If changing the electric power cable, use solely
“HAR H05 VV-F”
3x0.75
mm2 cable with a maximum outside diameter of 8 mm.
Room thermostat (optional)
B
CAUTION: The room thermostat must have clean contacts. CONNECTING
230 V. TO THE TERMINALS OF THE ROOM THERMOSTAT WILL IRREPA-
RABLY DAMAGE THE ELECTRONIC CARD.
When connecting a remote timer control or a timer switch, do not take the pow-
er supply for these devices from their cut-out contacts. Their power supply must
be taken with a direct connection from the mains or with batteries, depending
on the kind of device.
Accessing the electrical terminal block
The electrical terminal block is located inside a sealed box at the bottom left of the cab-
inet. Make the electrical connections as shown in the wiring diagram on fig. 37 and run
the cables through the special cable glands.
fig. 22 - Electrical terminal block
42
DHW temperature sensor (not supplied)
72
Room thermostat (not supplied)
72b
Room thermostat (not supplied)
95
Diverter valve (not supplied)
A
= Heating phase
B
= DHW phase
C
= Neutral
NOTE:
For valves with 2 wires and spring return, use the connections B and C
130
DHW circulating pump (not supplied)
138
External probe (not supplied)
139
Remote timer control (not supplied)
256
Modulating heating circulating pump signal
298
Cascade temperature sensor (not supplied)
299
Input 0 -10 Vdc
300
Burner lit contact (voltage-free contact)
301
Fault contact (voltage-free contact)
302
Remote reset input (230 Volt)
306
Heating system circulating pump (not supplied)
307
Heating system second circulating pump (not supplied)
For connection in cascade (max. 6 modules)
1.
Connect the modules as shown in fig. 23 (example with 4 modules)
fig. 23 - Connection in cascade
A
1st Module
B
2nd Module
C
3rd Module
D
4th Module
2.
Carry out all the electrical connections (terminals 4 to 24) on module no. 1
3.
On the remaining modules, only connect the power supply and possible contacts
for: burner lit (300), fault contact (301) and remote reset input (302).
E
Zona 1
Zona 2
Zona 3
M
M
SM
298
138
PZ
TS
SM
PZ
TS
PR
FZ4
72/139
72/139
72/139
I*
D
F
Zona 1
Zona 2
Zona 3
M
M
SM
298
SM
PR
PZ
130
42
138
PZ
TS
TS
72/139
FZ4
72/139
72/139
I*
D
1
2
4
5
6
7
8
9 10 11 12
13 14 15 16 17 18 19 20 21 22 23 24
(
( (
(
300
301
95
302
299
139
72
138
298
42
25 26 27 28 29 30
72B
130/307
306
A B C
31 32
256
25 26 27 28 29 30
25 26 27 28 29 30
25 26 27 28 29 30
25 26 27 28 29 30
A
B
C
D
31 32
31 32
31 32
31 32
A
10 11 12
10 11 12
B
10 11 12
C
10 11 12
D
cod. 3540S566 - Rev. 01 - 02/2015
Summary of Contents for ECONCEPT 51 A
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