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Sanden Vendo CDU-L R06A2B, Руководство по установке

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Sanden Vendo CDU-L R06A2B Скачать руководство пользователя страница 16

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8.1. External ON/OFF control signal 

16

System control logic

1. The cooling demand is managed by dry contact sent to the CDU (terminals CLA/CLB) see page 15
2. The speed of compressor controls the LP to reach the set point tuned by the installer (A02/B02) see page 25
3. The low pressure is function of the evaporating temperature required for the showcase. (Tev = Tair_sc –

T). 

4. Electronic Expansion Valve (EEV) of the CDU controls the HP to reach the HP target.                                          

This HP optimal target is calculated in accordance with ambient outside temperature and the LP set point.

5. Showcase EEV controls the superheat at the evaporator side

Defrost control logic

1. CDU compressors and fans should stop before the evaporator defrost. 
2. Dry contact signal is sent to the CDU when defrost is requested Defrost (terminal CLA/CLB) see page 15.
3. Compressors will stop gradually depending current speed.
4. For installation with several evaporators, one EEV evaporators side must stay opened to avoid High Pressure 

failure during stopping session. See wiring example page 18

Содержание Vendo CDU-L R06A2B

Страница 1: ...Delivering CO2 solutions in commercial refrigeration SANDEN CO2 RETAIL SOLUTIONS CDU L R06A2B 3 Phases 400V installation guide 1...

Страница 2: ...ifications 2 Product diagram 3 Operation diagram 4 Installation instruction 5 Handling 6 Piping connection 7 Power supply connection 8 External ON OFF control signal 9 Piping and vacuuming 10 CO charg...

Страница 3: ...Modifiez le style du titre 1 Product specifications CDU L 3...

Страница 4: ...Modifiez le style du titre 2 Product diagram CDU L 4...

Страница 5: ...3 1 Operation diagram MT loop A B 5 1 2 3 4 5 1 2 3 4 5 6 7 8 9 10 5 1 2 3 4 Loop A Loop B Loop C OFF MT A B Te 5 Tambient 10 Loop A CLA Loop B CLB Loop C CHC 5 1 2 3 4 Loop A Loop B MT A B Te 5 Tamb...

Страница 6: ...Modifiez le style du titre 6 1 2 3 4 5 1 2 3 4 5 6 7 8 9 10 1 2 3 4 5 6 7 8 9 10 Loop A Loop B Loop C LT A B Te 30 Tambient 25 Loop A CLA Loop B CLB Loop C CHC 3 2 Operation diagram LT loop A B...

Страница 7: ...B 6 7 8 9 10 Loop A LT Teva 30 Loop B MT Teva 5 Loop C High stage compressor Ambient Temperature 25 1A 2A 3A 4A 5A 1B 2B 3B 4B 5B 6 7 8 9 10 Loop A Loop B Loop C LT loop A MT loop B Loop A CLA Loop B...

Страница 8: ...ication Only a single evaporator is installed per cooling loop the distance should not exceed 20m meaning 40m maximum piping supply and return Installation beyond this distance results in a lack of co...

Страница 9: ...0 mm of free space on the left and right hand side and the front and back 9 1 Installation conditions Provide space above the equipment to allow it to be opened access for maintenance reparation opera...

Страница 10: ...nit 5 The air outlet must not be directed towards house windows or plantations 6 Place the equipment on a solid smooth surface 7 Place the equipment in a location where dust and debris do not risk bei...

Страница 11: ...are in contact with hoisting ropes e g using cardboard 2 When the refrigerating unit is raised do not go beneath it 3 Weight CDU L Product weight 135kg Total weight including packaging 145kg 4 This pr...

Страница 12: ...ndatory 19mm for MT application 32mm for LT application 2 Avoid CO2 pipes contact with other conducts or pipes 3 Avoid installation in corrosive environment Low pressure equipment Evaporator Low press...

Страница 13: ...or 13 Remarks It s not necessary to add expansion valve on evaporator because the CDU has is own expansion valve Add just thermostat device with defrost control Evaporator volume MT 15000cc if more ri...

Страница 14: ...14 6 3 CDU L connected to several evaporators 14 Remarks Expansion valve for each evaporator One Pressure sensor by loop Evaporator volume MT 15000cc if more risk of poor lubrication LT 5000cc if mor...

Страница 15: ...kW Voltage 400V AC Frequency 50 60 Hz Electric consumption 5 5kW Rated curent 8 5A Electrical power 6 9kVA Ground fault circuit breaker 10A Power supply Communication Cabinet regulator GND Cooling dem...

Страница 16: ...CDU controls the HP to reach the HP target This HP optimal target is calculated in accordance with ambient outside temperature and the LP set point 5 Showcase EEV controls the superheat at the evapora...

Страница 17: ...Modifiez le style du titre 8 2 Electrical connection Thermostat 1 evaporator P N Supply thermostat Contact Fan Contact Defrost FAN Resistance CDU L CLA CLB Dry Contact 17...

Страница 18: ...regulator several evaporators Mandatory to supply 1 of the AKVH during the ramp down of the CDU to avoid discharge pressure cut AKVH control R14 01 On Off Remarks The contact of auxiliary relay KA NO...

Страница 19: ...g system 2 2 Charge Nitrogen gas in 80bar or 55bar if using 60bar relief valve 2 3 Check brazed part using leakage detector or leakage test liquid formability 3 Vacuuming 3 1 Set R744 CO manifold vacu...

Страница 20: ...Modifiez le style du titre 9 2 CDU connection to the evaporators 1 Remove process pipe 2 Insert pipe 3 Brazing pipe 20...

Страница 21: ...ce valves connection and handling 1 Untightened the protection caps 3 Untightened the compression packing 4 Service valve handling 2 Connect the CDU to the manifold Outlet Male G 3 8 Example of connex...

Страница 22: ...5 Compressor start running push operation SW if CO2 charging stop before reaching target weight 6 Close service valve after CO2 weight reaching target amount 7 Keep check cooling operation until evapo...

Страница 23: ...g amount estimation 23 Evaporator volume Piping length Example for a Medium temperature application at 5 C of evaporating temperature with an evaporator volume of 10 litres 15m A R of piping 1 4 3 8 C...

Страница 24: ...50 5 50 5 50 5 50 5 50 5 50 5 50 35 5 00 5 00 5 00 5 00 5 00 5 00 5 00 5 00 5 00 5 00 Target discharge temperature T_dis Ambient temperature T_amb 40 35 30 25 20 15 10 5 0 5 Evaporating temperature T_...

Страница 25: ...button DOWN UP and SET for 3 secs from normal display 2 CLA blinking on display A parameter 3 Press DOWN or UP if changing each parameter set as CLB or CHC 4 Press right SET button if entering each p...

Страница 26: ...parameter 1 Press only right SET button for 3 secs from normal display 2 P00 blinking on display P parameter 3 Press right button SET if moving other P parameter P01 P02 4 Press DOWN or UP if changin...

Страница 27: ...T amb for HP Calculation 33 33 27 19 14 12 12 12 A B15 Discharge Temp for HP Reduction Control 115 115 115 115 105 105 105 105 A B17 Target High Pressure Reduction bar 1 1 1 1 2 2 2 2 A B18 Reset Tem...

Страница 28: ...Modifiez le style du titre 11 3 Reading parameters list 28...

Страница 29: ...65 1 9337 20 16 2 1 2 2237 1012 8 58 816 163 14 436 44 0 86593 1 9287 21 15 2 2 2 2908 1008 60 728 165 34 436 27 0 87421 1 9237 22 14 2 3 2 3593 1003 1 62 697 167 55 436 09 0 88249 1 9187 23 13 2 3 2...

Страница 30: ...In case of dirt inside the CDU clean the outdoor heat exchangers with soft brush or vacuum cleaner 3 Water can be used in case of clogged heat exchanger Noted CDU operation should be stopped when usi...

Страница 31: ...Delivering CO2 solutions in commercial refrigeration THANK YOU 31...

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