Stulz C2020 User Manual

EN/07.2013/58/42
4.1.1. Cooling
Parameters Compressor starts (DIG-OUT R1) when temp: Compressor stops (DIG-OUT R1) when temp:
Unit
1
Without
freecooling
M55
M56
T-ON=CS+[50% B]
T-ON=S01+[M55*S06]
T-OFF=CS+[0% B]
T-OFF=S01+[M56*S06]
With
freecooling
TI-TAE>2°C
M57
M58
M36
T-ON=CS+ [100% B]+[OFFSET FC*B]=
25+[100%*5]+[40%*5]=32°C
T-ON=S01+[M57*S06]+[M36*S06]
T-OFF=CS+[50% B]+[OFFSET FC*B]=
25+[50%*5]+[40%*5] = 29.5°C
T-OFF=S01+[M58*S06]+[M36*S06]
Unit
2
Without
freecooling
M55 - M56
M59 - M07
T-ON=CS+[50% B]+ [OFFSET*B]
T-ON=S01+[M55*S06]+[M59*S06]
T-OFF=CS+[0% B]+[OFFSET*B]
T-OFF=S01+[M56*S06]+[M59*S06]
With
freecooling
M36 - M57
M58 - M59
M07
T-ON=CS+[100% B]+[OFFSET*B]+ [OFFSET
FC* B] = 25 + 5 + 2 + 2 = 34°C
T-ON=S01+[M57*S06]+[M59*S06]+[M36*S06]
T-OFF=CS+[50% B]+[OFFSET*B]+
[OFFSET FC*B]= 25+2.5+2+2=31.5°C
T-OFF=S01+[M58*S06]+[M59*S06]+[M36*S06]
Unit 2 is used in case one unit is not enough to satisfy the need of cooling (or dehumidification): the second unit will
support the work of the first one. In order to avoid useless working of the second unit, it’s possible to decide the time in
which the support unit must start (delay start).
4.1.2. Heating
The parameters involved are:
• S03 HEATING SET POINT: pre-set = 15°C
• S04 SECOND HEATER SET POINT: pre-set = 15°C
• S07 HEATING BAND: (B): pre-set = 5°C
• I66 SELECT RELAY SECOND HEATER: pre-set = No connection
• M64 HEATER ENABLE YES/NO: pre-set = NO
• M65 HEATING ELEMENTS START (% OF BAND): pre-set = 50%
• M66 HEATING ELEMENTS STOP (% OF BAND): pre-set = 0%
• M68 ENABLE SECOND HEATING STEP: pre-set = NO
Special parameter involved for unit 2:
• M67 OFFSET for UNIT #2 HE – Start/Stop: pre-set = 50%
Heaters start (DIG-OUT R3) when temp: Heaters stop (DIG-OUT R3) when temp:
Unit 1 With or without
freecooling
T-ON = HS - [50% B]
T-ON = S03 - [M65 * S07]
T-OFF = HS - [0% B]
T-OFF = S03 - [M66 * S07]
Unit 2 With or without
freecooling
T-ON = HS - [50% B] - [50% B]
T-ON = S03 - [M65 * S07] - [M67* S07]
T-OFF = HS - [0% B] - [50% B]
T-OFF = S03 - [M66 * S07] - [M67 * S07]
If one unit is not enough to satisfy the need of heating, the second unit will support the work of the first one.
Second heater control
Parameters The second heater starts, when the temp: The second heater stops, when the temp:
Unit 1
S04: pre-set = 15°C
I66: pre-set = No connection
M68: pre-set = NO
T-ON = HS2 - [50% B]
T-ON = S04 - [M65 * S07]
T-OFF = HS2 - [0% B]
T-OFF = S04 - [M66 * S07]
Unit 2
S04: pre-set = 15°C
S07: pre-set = 5°C
I66: pre-set = No connection
M65: pre-set = 50%
M66: pre-set = 0%
M67: pre-set = 50%
M68: pre-set = NO
T-ON = HS2 - [50% B] - [OFFSET * B]
T-ON = S04 - [M65 * S07] - [M67 * S07]
T-OFF = HS2 - [0% B] - [OFFSET * B]
T-OFF = S04 - [M66 * S07] - [M67 * S07]

Stulz C2020 Specifications

General

Brand	Stulz
Model	C2020
Category	Controller
Language	English