Evco c-pro 3 nano CHIL User Manual

EVCO S.p.A. c-pro 3 nano CHIL | Application manual ver. 1.0 | Code 144CP3NCHE104
page 62 of 90
To avoid immediate start-up of a defrost cycle after all the compressors have been stopped, a Minimum circuit restart delay Pd07 is
used which guarantees at least a period of heat pump operation before entering the defrost cycle.
Note: In the event of a unit with dual circuit, the defrost cannot be simultaneous; so if a circuit is performing defrost, the other cannot
launch a defrost cycle until the first has completely finished its own cycle.
8.12.1 Defrost Cycle Compensation
With a drop in the external temperature, the aqueous vapour content in the air (which causes the formation of frost on the evaporation
coil, thus creating a need to perform defrost), decreases and it could therefore be advantageous to increase the defrost activation delay
in relation to reduction of the external air temperature to improve efficiency of the entire system. If enabled from parameter Pd20, this
function is activated with an External air temperature setpoint for defrost compensation start-up Pd21, below which the compensation
starts, with increase of the defrost activation delay up to a maximum value (Maximum defrost delay Pd23) to reaching of the External
air temperature setpoint for defrost compensation arrest Pd22.
To enable this function, the external air temperature probe must be enabled
8.13 Anti-Freeze/Auxiliary Heating Heaters Management
On the air/water or water/water machines, the anti-freeze control is active even when the machine is off.
There are two thresholds with respective differentials: one is used to activate the heaters and the other to sound the alarm and stop
the compressors in the relative circuit.
Pressione
Pd02
Pd01
Pd03
Pd04
Valvola
inverter
Pd06
Sbrinamen Gocc.
Pd23
Activation delay
T ext.
Pd22 Pd21
Pd03

Evco c-pro 3 nano CHIL Specifications

General

Brand	Evco
Model	c-pro 3 nano CHIL
Category	Controller
Language	English