Innova 3in1 5M Installer Manual page 33

XP1 three-phase terminal block
DR
Connection for pan heater Kit DR0656 (max. 1A)
CA Auxiliary heater consent (max. 2A)
T�EXT External air sensor temperature (max. 50 m)
SC
Sanitary boiler consent
ON
Remote ON/OFF contact (or SAN ON/OFF)
TA
Ambient thermostat called heating/cooling
AL
Anti-legionella clock contact (or summer/winter, open winter)
U2 U1 Serial connection of external unit terminals U2/U1
EXTERNAL UNIT
Outdoor unit electrical terminal block
POWER SUPPLY
400V AC power supply terminal block
MORSETTIERA CONTATTI AUSILIARI
DR CA T.EXT SC
Description of auxiliary contacts
Terminals for serial connection of external unit
1 - 2:
serial connection of external unit terminals U1 and
U2 (by the installer).
• the connection is not polarised
• use a shielded double-core wire with minimum cross-sec-
tion of 0.35 mm² for the connection.
Keeping the cable separate from power supply cables.
Terminals for configuration input for activation of an-
ti-legionella function
3 - 4:
Configurable for:
• the anti-legionella function
• for the cooling/heating selection
By activating the Antilegionella function, the regulator can
conduct the thermal disinfection procedures autonomously
on hot water systems equipped with recirculation, consid-
er-ably reducing the risk of the presence and proliferation of
the bacteria causing Legionella.
for activation of the anti-legionella function (to purchase
separately, together with a timer, and to be connected by
the installer)
XP1
ON TA AL U2 U1
MORSETTIERA DI POTENZA
EXTERNAL POWER
UNIT SUPPLY
The variables in the systems in which our products may be
installed do not allow the total exclusion of the risk.
Activation of the disinfection function can be performed by
connecting a timer to the inlet that has a default value set for
2 a.m. the night between Sunday and Monday; as statistically
this is a time with a low probability of employment on behalf
of the users.
The length of the action depends by the features of the in-
stallation.
Legionella bacteria react differently de-pending upon the
maximum temperature reached within the circuit and, with
the increase of temperature, the dura-tion time decreases.
Terminals for connection for CT section "DHW only" by
external volt-free contact
5 - 6:
TA consent from room thermostat or generic volt-
age-free contact.
• Closed contact: the unit is switched on for heating or cool-
ing the plant water.
• Open contact: the unit is switched off for heating or cool-
ing the plant water.
If the domestic hot water function is active, this function
has priority even when the contact is open.
The terminals are supplied jumped (contact closed). Re-
move the jumper to connect the TA consent.
INSTALLATION
33