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ECONCEPT 51/51i - 101/101i

One direct heating circuit and one DHW circuit with diverter valve
Check/Change parameter P02 of the "Transparent Parameters Menu" to

Change parameter P.02 of the "System Type Menu" to 1.
Change parameter P.09 of the "System Type Menu" to 1.
Change parameter P.11 of the "System Type Menu" to 1.

fig. 21

Two direct heating circuits
Check/Change parameter P02 of the "Transparent Parameters Menu" to

Change parameter P.01 of the "System Type Menu" to 4.
Change parameter P.02 of the "System Type Menu" to 1.
Change parameter P.09 of the "System Type Menu" to 1.

fig. 22

Two mixed heating circuits and one direct heating circuit
Check/Change parameter P02 of the "Transparent Parameters Menu" to

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 reg-
ulator" handbook

fig. 23

Two mixed heating circuits, one direct heating circuit and one DHW circuit with pump
Check/Change parameter P02 of the "Transparent Parameters Menu" to

fig. 24

3.4 Electrical connections
Connection to the electrical grid

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.

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)

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.

External probe (optional)

Connect the probe to its respective terminals. The maximum permissible length for the
boiler - external probe connection electrical cable is 50 m. A normal 2-wire cable can be
used. The external probe should preferably be installed on the North, North-West wall or
that facing the largest area of living room. The probe must never be exposed to the early
morning sun or, insofar as possible, direct sunlight; protect it if necessary. In any case,
the probe must not be installed near windows, doors, ventilation openings, flues or heat
sources that could affect the reading.

fig. 25 - External probe positioning not recommended

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Zona 1