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Control Box
1 5
Operating principle
The regulation controls the internal temperature
based on the outdoor temperature measurement
and governed by the temperature control. The room
thermostat (optional) provides a corrective action for the
temperature control.
• Regulation functions
- The heating circuit's initial temperature is controlled by
the temperature control.
- The power of the heat pump is modulated according to
flow heating temperature via the "inverter" compressor.
- The daily timer program enables you to define
the periods for comfortable or reduced ambient
temperature.
- Summer/winter mode switchover is automatic.
- Control of the supplementary boiler*.
- The room thermostat* (optional) provides a corrective
action for the temperature control.
- Domestic hot water* : Heating time programme, control
of the operation of the DHW circulation pump.
- Managing the cooling.
• Protection functions
- Anti-legionella cycle for domestic hot water.
- The frost protection works in all modes of operation
and has priority over other functions.
*
If the heat pump is equipped with optional equipment and
.
the associated kits
- 6 -
• Domestic hot water (DHW) operating principle
Two domestic hot water (DHW) temperatures can be
parametered : nominal temperature (line 1610 to 50 °C)
and reduced temperature (line 1612 to 25 °C).
The default heat pump program (line 560, 561 and 562)
is set for nominal temperature from 0.00 to 5.00h and
for reduced temperature for the rest of the day.
This optimizes electrical consumption while ensuring
comfortable availability of hot water.
Setting for reduced temperature can be useful to prevent
the DHW from switching on too often and for too long
during the day.
The production of domestic hot water (DHW) is triggered
when the temperature in the tank falls 7°C (setting from
line 5024) below the set temperature.
The heat pump produces the domestic hot water,
which is then additively heated, if required, by electrical
backup heating inside the tank.
Depending on how the parameter (1620) is set, nominal
temperature can be reached 24h/day or only at night or
depending on the heat pump programme.
The regulating of the temperature of domestic hot water
has priority over the heating circuit by switching the
directional valve.
The production of DHW takes priority over heating;
nevertheless the production of DHW is controlled by
cycles that control the times assigned to the heating
and the production of DHW in the event of simultaneous
demand.
A function to switch from "reduced" to "nominal" is
provided on the front of the user interface.
(see
ref. 1, figure 9, page
If the heating installation is equipped with a DHW
circulation pump, the pump's operation during DHW
cycles can be parametered.
Anti-legionella cycles can be programmed.
Installation and operating manual "1395 - EN"
12).
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