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USER MANUAL – Release 1.2 of 01/01/2010
Page 40 of 191
Version: 02/03/2010
FS 48
Domestic hot water solenoid valves disabling in case of hot water production
only (dedicated pipework).
If the function is active during production of domestic hot water only (no
cooling or heating demand) the solenoid valves remain in their standard
position and only the domestic hot water pump is activated.
0
1
FS 49
Evaporator pump disabling in case of hot water production only (dedicated
pipework).
If the function is active during production of domestic hot water only (no
cooling or heating demand) the evaporator pump is switched OFF.
0
1
FS 50
Overlapping time between evaporator and domestic hot water pumps working
If the evaporator water pump is disabled during domestic hot water production
only (FS49=1) it is switched OFF FS50 seconds after the activation of the
domestic hot water pump
0
250
sec
FS 51
Compressors OFF time before cycle switch
Delay time before actual begin of a domestic hot water production
0
250
Secs
FS 52
Compressors OFF after cycle switch
Delay time after actual end of a domestic hot water production before starting
again the “normal working”
0
250
Secs
FS 53
Minimum time in cooling mode before activating the domestic hot water
production
In case of demand of both domestic hot water and cooling the unit is forced to
work for FS53 in cooling mode only to ensure enough refrigerant is stored in
the condenser.
0
250
Secs
FS 54
Minimum demand (number of steps) in cooling mode
Defines the number of cooling demand capacity steps necessary for activation
of c domestic hot water production. In case the domestic hot water
production function is active any cooling demand for less than the number of
steps defined on FS54 is neglected.
1
16
FS 55
Minimum demand (number of steps) in heating mode (priority to heating
against domestic hot water production)
Defines the number of heating demand capacity steps necessary for
activation of “standard heating mode”.
In case the domestic hot water production function is active any heating
demand for less than the number of steps defined on FS55 is neglected.
1
16
FS 56
Capacity modulation (number of capacity steps active) in case of
cooling/heating demand and domestic hot water function active at the same
time
0 = temperature control follows the domestic hot water demand
1 = temperature control activates the maximum number of capacity steps
between domestic hot water and “normal” heating or cooling function
requirement.
2 = temperature control activates all capacity steps (only in heating mode,
cooling mode works as FS56=1)
0
2
Free-cooling
Parameter Description
min
max
um
Resolution
FC 1
Free-cooling enabling
0 = Disabled
1 = Fan speed modulation depending on condensing pressure/temperature
2 = Fan speed modulation depending on water temperature
3 = External free cooling. Fan speed modulation depending on water
temperature
0
3
FC 2
Free-cooling activation/disabling differential
The FC function is enabled if the external temperature drops at least FC02
below the evaporator inlet water temperature for at least FC03
0
110
230
°C
°F
Dec
int
FC 3
Free-cooling activation/disabling delay time
0
250
Secs
10 Secs
FC 4
Dampers / Water 3-way valve / Free-cooling ON/OFF relay proportional band
0
25
°C
°F
Dec
int
FC 5
Outdoor fans Free-cooling proportional band
0
25
°C
°F
Dec
int
FC 6
Outdoor fans proportional/step regulation activation in free-cooling mode
0 = Full speed on free cooling demand
1 = Modulating on free cooling demand
0
1
FC 7
Free cooling mode antifreeze alarm prevention set point
-50.0
-58
110
230
°C
°F
Dec
int
FC 8
Free cooling mode antifreeze alarm prevention differential
0.1
0
25.0
45
°C
°F
Dec
int
FC 9
Maximum fan speed in free cooling mode
0
100
%
FC 10
Minimum fan speed in free cooling mode
0
100
%
FC 11
Fan full speed time at start
0
250
sec
FC 12
Condensing pressure/temperature 1
st
step coil split set point
-50.0
-58
0.0
0
110
230
50.0
725
°C
°F
Bar
Psi
Dec
int
Dec
int
