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Function
Parameter Description
External heat source
148
air temperature limit
Temperature list
149
Auxiliary outdoor air
150
temperature limit
56
Auxiliary delay
151
Auxiliary hysteresis
152
Domestic hot water in
153
off mode
Status of external
154
heat source
Main water pump vs
external heat source
155
status
Electric trace heater/
156
additional water pump
Additional water
157
pump
Delta air set point
158
TABLE OF FACTORY PARAMETERS AND FUNCTIONS
Function
Parameter Description
Unit confi guration
This code is used to set the outside air temperature threshold value below which only
the external heat source will be operative as per algorithm. (Heat Pump Stop)
Code used to set which temperature the control panel should display in the temperature
zone.
1. Indoor air temperature
2. Outlet water temperature (from LWT sensor)
3. N.A.
4. Refrigerant temperature (from TR sensor)
5. Suction temperature (from TS sensor)
6. Discharge temperature (from TD sensor)
7. Refrigerant temperature (from TE sensor)
This code is used to set the outside air temperature threshold value below which both
the heat pump and the external heat source will be operative as per algorithm.
This code is used to set the delay time after which, when (temperature set in code 148)
< Outside Air Temperature < (temperature set in code 150), the external heat source
will switch on.
The counting of the time starts when the activation of the external heat source is
required as per algorithm.
This code is used to set the hysteresis temperature needed to activate the external
heat source.
Code to establish whether, when the system is in off mode, the domestic hot water
production logic can be activated:
1. Yes, the domestic hot water logic is always active
2. No, the domestic hot water logic can be activated only in Heating or Cooling mode
Code used to establish the status of the external heat source when this later is activated
and the outside air temperature is below the temperature value set with parameter 148:
0. Always active
1. On/Off depending by actual room temperature vs room temperature set-point (same
hysteresis of the thermostat function). If the command is not installed or the room
sensor is unavailable, On/Off depends on the water set-point (+1/-4 °C of hysteresis)
2. On/Off depending on the water set-point (+1/-4 °C of hysteresis).
This code is used to defi ne the water pump logic when the external heat source is
activated and the outside air temperature < temperature value set in Code 148
0. Always off
1. On/Off depending on the On/Off status of the external heat source
2. Always on
Code used to select the output connected to PIN 12 on the terminal board. In case an
additional water pump option is active, this code is used to select its operating system with
respect to the domestic hot water request (ACS) (if outside air temperature > (temperature
value set with Code 148).
0. Electric heat tracing installed for the antifreeze system
1. Additional water pump On/Off depending on the main water pump logic. This means that if the
DHW is on, the additional water pump is ON.
2. Additional water pump On/Off depending on the main water pump logic, but always OFF when
the DHW is on.
This code is used to establish the additional water pump, if it has been installed, when
the outside air temperature < temperature value set with Code 148:
0. Always off
1. On/Off depending on the On/Off status of the external heat source
2. Always on
Code used to establish the hysteresis with respect to the ambient temperature set point
to switch off the unit when control panel system is installed and used as a thermostat
(100 control panel code = 4).
This code is used to confi gure the unit:
0. Cooling only
302
1. Heating and cooling
2. Heating only
HYDRONIC UNIT
Value range
Default value Set value
-20°C
65°C
-20°C
1
7
-20°C
30°C
1 Min 60 Min
10 Min
1°C
20°C
1
2
0
2
0
2
0
2
0
2
0.2°C
1°C
0.3 °C
Value range
Default value
Min
Max
0
2
1
0°C
5°C
1
1
1
1
2
Set
value
1
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