Evco EV3 200 WEB - 7.5 Evaporator Fan Regulation

1143W24E4.00 · EV3 200 Web 03/2021
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7.5 EVAPORATOR FANS
The evaporator fan regulator is activated in the following conditions:
• The delay F3 has elapsed at the end of dripping;
• The temperature of the evaporator probe Pb3 is higher than the threshold F1 (if F0=3,4);
• The fans are not deactivated during defrost F2 = 0;
• There is no dripping active d7.
7.5.1 Regulator operation
The evaporator fan regulator may be activated following a request from another regulator as follows:
• Compressorrequest,toencourageproductionanddiffusionofcoolair(heatregulationfunction);
• Defrostrequest,tocontrol/limitthediffusionofhotair;
• Humidication/dehumidicationrequest,tospreadorlimitthediffusionofhumidity.
7.5.2 Operating mode
The evaporator fans operate according to parameter F0:
Par. Description MU Range
F0
Evaporator fan mode in normal operating mode.
With F0 = 0 it is possible to manage cycles by setting F11,F12.
0 = In cycles;
1=AlwaysON;
2 = On with compressor ON;
3 = Thermostat controlled (F1 relative to temperature control);
4 = Thermostat controlled with compressor ON (F1 relative to temperature control).
--- 0...4
Evaporator fan cycles with F11 > 0
ON
OFF
F11
F9 F12
ON
OFF
Pb3
Setpoint + F1
Setpoint + F1+F8
Fig. 32. Operation of evaporator fans with F11 > 0
7.5.3 Operation during defrost
Operation of the evaporator fans during defrost depends on F2.
Par. Description MU Range
F2 Evaporator fan mode during defrost. 0=OFF;1 = ON; 2=AccordingtoF0. --- 0...2
7.5.4 Fan operation during dripping
Duringdripping,theevaporatorfansstayoffforthetimesetbyd7.AfurtherdelayofF3 may be set when the evaporator fans
areactivatedafterdripping.Inthiscase,thefansareactivatedafterF3 has elapsed.
Par. Description MU Range
d7 Evaporator dripping time after defrost. min 0...15
F3 Maximum time evaporator fans off after dripping. min 0...15