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USER MANUAL – Release 1.2 of 01/01/2010
Page 36 of 191
Version: 02/03/2010
Ar 16
Boiler function working set point and differential
0 = Heating mode set point (ST04) and differential (ST08)
1 = Boiler function set point (Ar13) and differential (Ar14)
2 = The Working set point is the Heating set point increased by the Boiler
function set point (ST04+Ar17) and differential is the Boiler function one
(Ar18)
0
2
Boiler heaters function in heating mode
Ar 17
Boiler heaters function set point in heating mode
-50.0
-58
110
230
°C
°F
Dec
int
Ar 18
Boiler heaters function proportional band in heating mode
0.1
0
25.0
45
°C
°F
Dec
int
Ar 19
External air set point for compressors disabling in integration mode
-50.0
-58
110
230
°C
°F
Dec
int
Ar 20
External air differential for compressors disabling in integration mode
0.1
0
25.0
45
°C
°F
Dec
int
Defrost
Parameter Description
min
max
um
Resolution
dF 1
Defrost method
0 = Disabled
1 = According to evaporating pressure/temperature
2 = Start as defined on parameter dF28, end by maximum time
3 = Start as defined on parameter dF28, end by external contact
4 = By outdoor fans
0
4
dF 2
Defrost start temperature/pressure
-50.0
-58
0.0
0
110
230
50.0
725
°C
°F
bar
psi
Dec
int
Dec
Int
dF 3
Defrost end temperature/pressure
-50.0
-58
0.0
0
110
230
50.0
725
°C
°F
bar
psi
Dec
int
Dec
Int
dF 4
Minimum defrost duration
0
250
Secs
dF 5
Maximum defrost duration
1
250
Min
dF 6
Delay time between defrost on two different circuits
0
250
Min
dF 7
Compressors OFF time before defrost cycle start
0
250
Secs
dF 8
Compressors OFF after defrost cycle end.
0
250
Secs
dF 9
Delay time before defrost cycle start
Delay
time
between
the
reaching
of
the
defrost
conditions
(pressure/temperature) and the actual start of the defrost cycle.
1
99
Min
dF 10
Circuit n° 1 combined defrost cycle start temperature set point
After the expiration of the dF09 delay the actual defrost cycle occurs only
when the temperature sensed by the circuit 1 combined defrost temperature
probe drops below the dF10 limit.
-50.0
-58
110
230
°C
°F
Dec
int
dF 11
Circuit n° 2 combined defrost cycle start temperature set point
-50.0
-58
110
230
°C
°F
Dec
int
dF 12
Circuit n° 3 combined defrost cycle start temperature set point
-50.0
-58
110
230
°C
°F
Dec
int
dF 13
Circuit n° 4 combined defrost cycle start temperature set point
-50.0
-58
110
230
°C
°F
Dec
int
dF 14
Circuit n° 1 combined defrost cycle end temperature set point
The actual defrost cycle on circuit 1 terminates when the temperature sensed
by the combined defrost temperature probe exceeds the dF14 limit.
-50.0
-58
110
230
°C
°F
Dec
int
dF 15
Circuit n° 2 combined defrost cycle end temperature set point
-50.0
-58
110
230
°C
°F
Dec
int
dF 16
Circuit n° 3 combined defrost cycle end temperature set point
-50.0
-58
110
230
°C
°F
Dec
int
dF 17
Circuit n° 4 combined defrost cycle end temperature set point
-50.0
-58
110
230
°C
°F
Dec
int
dF 18
Forced activation of all capacity steps during defrost – circuit 1
0 = disabled
1 = enabled
0
1
dF 19
Forced activation of all capacity steps during defrost – circuit 2
0
1
dF 20
Forced activation of all capacity steps during defrost – circuit 3
0
1
dF 21
Forced activation of all capacity steps during defrost – circuit 4
0
1
dF 22
Delay between two compressors/capacity steps activation during defrost
mode
1
250
Secs
dF 23
Ventilation enabling during defrost / dripping time
0 = disabled
1 = enabled only during defrost
2 = enabled in defrost / dripping
0
2
dF 24
Condensing pressure/temperature level for outdoor fans forced activation
during defrost / dripping time.
The outdoor fans are activated during defrost / dripping time only if
condensing pressure is above the dF24 level. If this case occurs the
condensing pressure is the variable used for modulating the fan speed.
-50.0
-58
0.0
0
110
230
50.0
725
°C
°F
bar
psi
Dec
int
Dec
Int
