Evco c-pro 3 nano CHIL - Operating Limit Management (Heat Pump)

EVCO S.p.A. c-pro 3 nano CHIL | Application manual ver. 1.0 | Code 144CP3NCHE104
page 71 of 90
• PC51 = Pressure parcelling setpoint at low temperatures
• PC52 = Pressure parcelling differential at low temperatures
• PC53 = Low external temperature threshold
• PC54 = Refrigerated water high temperature threshold
• PC55 = Parcelling delay from low pressure alarm.
Depending on the number of compressors configured, the percentage of power limitation is calculated based on this parameter:
• PC32 = Power limitation for winter operation
To enable this control, the external air temperature probe must be enabled
This control can be enabled only in winter operating mode (heat pump).
8.19.6 Operating limit management (heat pump)
When the external temperature drops to particularly low levels, it might no longer be cheap or sufficient to heat using the heat pump.
The Limit setpoint PC17 on the external temperature is used to disable the heat pump. Reactivation occurs when the external
temperature exceeds the limit setpoint plus a configurable Limit differential PC72.
T
aria
est.
Pressione
Soglia
Im
Imp+Diff
LPLT
Allarme
meno di 15 minuti
T
acqua
Soglia
Limit setpoint PC71
OFF
ON
Ext. T
Diff. PC72