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USER MANUAL – Release 1.2 of 01/01/2010
Page 37 of 191
Version: 02/03/2010
Defrost with condensation fans
dF 25
External temperature level for enabling defrost with outdoor fans
The function defrost with outdoor fans is enabled if the external temperature is
above the dF25 level.
-50.0
-58
110
230
°C
°F
Dec
int
Defrost Start/Stop
dF 26
Start of defrost cycle in units with more than 1 circuit
0 = independent
1 = starts if all circuits have reached the defrost start condition
2 = starts if at least one circuit has reached the defrost start condition
0
2
dF 27
End of defrost cycle in units with more than 1 circuit and unique management
of fan speed.
0 = independent
1 = end if all circuits have reached the defrost end condition
2 = end if at least one circuit has reached the defrost end condition
0
2
Analogue input for defrost start/stop
dF 28
Probe managing defrost start/stopt
0 = start and stop according to condensing pressure/temperature probe
1 = start according to evaporating pressure probe, stop according to
condensing pressure/temperature probe
2 = start according to condensing pressure/temperature probe, stop according
to evaporating pressure probe
3 = start and stop according to evaporating pressure probe
0
3
Forced defrost
dF 29
Delay time before forced defrost start
The device wait the delay time dF29 before starting a forced defrost cycle
after the relevant conditions have reached
0
250
secs
dF 30
Forced defrost evaporating pressure set point
Defines the evaporating pressure level for activation of a forced defrost cycle
-50.0
-58
0.0
0
110
230
50.0
725
°C
°F
bar
psi
Dec
int
Dec
Int
dF 31
Forced defrost evaporating pressure differential
0.1
0
0.1
1
25.0
45
14.0
203
°C
°F
Bar
Psi
Dec
int
Dec
int
Supply fan working in defrost mode
dF 32
Supply fan DISABLING during defrost
0 = Disabled – Supply fan works during defrost
1 = Enabled – Supply fan doesn’t work during defrost
0
1
Anti-freeze security for multi circuit units
dF 33
Forced activation of the circuits which are not defrosting
0 – Disabled
1 – Enabled with outdoor fans OFF
2 – Enabled with outdoor fans modulating according to evaporating pressure
Heat recovery
Parameter Description
min
max
um
Resolution
rC 1
Recovery mode
0 = Disabled
1 = 2 separate hydraulic circuits
2 = 2 parallel hydraulic circuits
3 = gas side total heat recovery
0
3
rC 2
Priority in heat recovery mode
0 = user side priority
1 = heat recovery side priority
0
1
rC 3
Forced capacity step deactivation time
0
250
Secs
rC 4
Forced capacity step deactivation time after rotation of the heat recovery
valve
0
250
Secs
rC 5
Minimum time in heat recovery mode
Minimum activation time of heat recovery function once enabled
0
250
Min
rC 6
Minimum heat recovery mode OFF time
Minimum time between disabling and following reactivation of heat recovery
function
0
250
Min
rC 7
Condensing pressure/temperature level for disabling heat recovery function
If the condensing pressure exceeds the rC07 level the heat recovery function
is automatically disabled.
-50.0
-58
0.0
0
110
230
50.0
725
°C
°F
Bar
Psi
Dec
int
Dec
int
rC 8
Condensing pressure/temperature differential for reactivation of heat recovery
function
Heat recovery function is reactivated if the condensing pressure/temperature
drops below the rC07 – rC08 level
0.1
1
0.1
1
25.0
45
14.0
203
°C
°F
Bar
Psi
Dec
int
Dec
int
rC 9
Heat recovery maximum disabling time from condensaing
pressure/temperature
After expiration of the rC09 delay the heat recovery function is reactivated
regardless the condensing pressure/temperature level.
0
250
Min
