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Application guide
Cascade HC/HFC - CO 2 system
How to control the system
AK-PC 740/780
AKS 32R
AKS 11
AKD 102
AKS 11
GD/DGS
AK-PC 740/780
AKS 2050
AKS 11
AKD 102
AKS 11
GD/DGS
AKD 102
EKC 313
AKS 32R
AKS 11
AKS 32R
AKS 2050
AKS 11
AKS 32 R
DCR
EVR
ETS
Pump
SGN
DCR
AKVH
AK-SC 255/
AK-SM 350/
AK-SM 720/
AKA 245
AK-CC 450
AKS 11
EVRH
AK-CC 550 A
AKS 32R
AKS 11
www.danfoss.com/co2
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Summary of Contents for Danfoss Cascade HFC
- Page 1 GD/DGS AK-SM 350/ AK-SM 720/ AKA 245 AKS 2050 AKS 11 AK-PC 740/780 AK-CC 450 AKS 2050 AKS 11 AKS 11 Pump EVRH AKD 102 AK-CC 550 A AKS 32 R AKS 11 GD/DGS AKS 32R AKS 11 AKVH www.danfoss.com/co2...
- Page 2 AK-CC 550 the high temperature side. As the temperature difference on the cascade condenser increases, the overall efficiency of the refrigeration system decreases! Application guide RA8AB102 © Danfoss 10/2010 Cascade HC/HFC - CO 2 system...
- Page 3 The same sequence is also valid for filling up the system. First of all, the high temperature circuit Danfoss pack controllers such as AK-PC 740 and needs to be filled with refrigerant and started up. AK-PC 780 are specially designed with built in When this is done, the CO 2 can be filled into the control functions to coordinate these operations.
- Page 4 AKS 11 AKS 11 Pump EVRH AKD 102 AK-CC 550 A AKS 32 R AKS 11 GD/DGS AKS 32R AKS 11 AKVH Cascade HFC - CO 2 system Application guide RA8AB102 © Danfoss 10/2010 Cascade HC/HFC - CO 2 system...
- Page 5 : • Level switch on compressor • Level switch on oil separator • Level switch on oil receiver • Pressure transmitter on oil receiver Cascade HC/HFC - CO 2 system Application guide RA8AB102 © Danfoss 10/2010...
- Page 6 AKVH and patented adaptive software algorithms to optimise system performance and operation. Pressure control The Danfoss CO 2 controllers have more pressure safety functions which prevents safety valves to open and hereby loss of charge. AK PC 740 pack controller...
- Page 7 • Electrically operated expansion valves for precise motor) expansion valve liquid injection in evaporators • Fully balanced, providing bi-flow feature as well as solenoid tight shut-off function in both flow direc- tions. Cascade HC/HFC - CO 2 system Application guide RA8AB102 © Danfoss 10/2010...
- Page 8 Danfoss can accept no responsibility for possible errors in catalogues, brochures and other printed material. Danfoss reserves the right to alter its products without notice. This also applies to products already on order provided that such alternations can be made without subsequential changes being necessary in specifications already agreed.