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Split system single phase type
4 3 5 Cooling Circuit 1 Function
The cooling sequence is automatically started when the
room temperature is higher than the comfort setpoint in
cooling mode (line 902) The cooling function must be
activated (command line 901 = Auto) and is triggered
by the programming clock (Command line 907) The
cooling sequence is interrupted as soon as heating circuit
1 indicates a need for heat or in the presence of a heat
demand signal from a DHW circuit or other heating circuit
(only if cooling is active) The controller measures the
current room temperature and compares it with the room
temperature setpoint to compute the flow temperature
setpoint If the temperature is not low enough the heat
pump is started to provide cooling (reversed control of
the mixing valve) The following settings apply to the
hydraulic circuit in zone 1 (HC1).
Operating Mode
Line N
Programming line
°
901
Operating mode (Off / Automatic)
The cooling key on the user interface enables switching
between operating modes
• Off:
The cooling function is deactivated
• Automatic:
The cooling function is automatically activated by the
time program (command line 907), the holiday program,
the occupancy key, or according to the need
Comfort cooling setpoint
Line N°
PROGRAMMING LINE
902
Comfort cooling setpoint
In cooling mode the room temperature control follows the
comfort setpoint adjusted under this setting The cooling
comfort setpoint can be displayed with a knob on the
room unit
In summer the comfort setpoint is gradually increased in
relation to the outdoor temperature (see lines 918-920)
Release:
Line N° PROGRAMMING LINE
907
Release (24h/day / heating circuit time pgm
Time program 5)
The "Release" setting determines the time program
according to which cooling is released
• 24h/day:
Cooling is continuously activated (24h/day)
• heating circuit time program:
Cooling is activated according to the heating circuit
time program
• Time program 5:
Cooling is released according to time program 5
- 70 -
If there is a second zone, this zone can be cooled with the
setting 963 which will connect the pump directly to zone
2 This will require setting the "Mixing valve subcooling
parameter (938) to a suitable value in order for both
zones to be adequately cooled according to the available
emitters
WARNING:
Cooling mode is prohibited on all radiators, heating-only
floors, or any emitters not intended for this purpose.
Cooling Characteristic
Line N°
PROGRAMMING LINE
908
Flow temp setp at OT 25°C
909
Flow temp setp at OT 35°C
The controller computes the flow temperature required
for a given averaged outdoor temperature based on the
cooling characteristic. This is defined by two reference
points (flow setpoint at 25°C and at 35°C).
Flow temp setp at OT 25°C
This is the cooling flow temperature required when the
averaged outdoor temperature is 25°C, without summe
compensation
Flow temp setp at OT 35°C
This is the cooling flow temperature required when the
averaged outdoor temperature is 35°C, without summer
compensation
908
/
909
The cooling characteristic is adjusted for a 25°C room
temperature setpoint If the room temperature setpoint
is changed the curve will automatically adapt
Maintenance document "1792 - EN"
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