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FRIGOMAR ENG - CU50VFD-CU70VFD 20190108.doc81218  Page 19 of 24 
 

4.4.2 Chiller operation logic:   

 
Compressor frequency from min (20Hz) to 
maximum value. 
Compressor frequency with proportional 
regulation based on the delta 
temperature: 
Cooling: delta = Tfwo-INP8 to compare to 
proportional band INP10; 
Heating: delta = INP9-Tfwo to compare to 
proportional band INP11. 
 
 
When unit switch between cooling and 
heating mode, compressor must stop for 3 
minutes (if in former mode compressor 
has started to run), fresh water pump 
keeping running and sea water pump 
start to run before compressor.  
 
 
 
 

 

5.0 WORKING LIMITS 

 
The unit operates correctly within the following ranges: 

 

 

Summer cooling mode:  

15°C < sea water temperature < 40°C 

 

Winter heating mode: 

  5°C < sea water temperature < 20°C 

 

Should working conditions be out of these ranges, in your particular application, please contact 
Frigomar before installation in order to find a suitable solution. 
 

 

Localized situations:

 in some regions, it is common to experience a tremendous 

presence of jellyfish or seaweed concentrated in back bay marinas for some periods 
of time. This can clog strainers, water pumps and heat exchangers in a little while, 
causing shut-down faults and sometimes equipment damage. In such particular 
conditions, please seek the advice of a local Frigomar service representative. Any 
possible modification to the overall system (chiller, pumps, strainers, etc) that could 
overtake the problem must be approved by Frigomar, otherwise warranty coverage 
will decline. 

 

The pump is not self-priming:

 any damage incurred due to a pump running dry is not 

covered under warranty. Air conditioning system must be switched off, as well as 
pumps, whenever there is a risk of pump unpriming, due to particular seawater 
conditions related to the boat type and its speed. The compressor could be 
damaged if the seawater flow through the heat exchanger is considerably reduced. 

 

This air conditioning system is designed to work under normal operation conditions.

 

Where failure or malfunctions could lead to an abnormal operating condition that 
could cause injury or damage to any equipment or other property, additional 
precautions must be designed into the control system. Other devices (limit or safety 
control) or systems intended to warn of, or protect against failure or malfunction, must 
be incorporated into and maintained as part of the system. 

 
 
 
 
 

Summary of Contents for CU50VFD

Page 1: ...Rivarola 16042 CARASCO GE Italia Phone 39 0 185 384888 Fax 39 0 185 384788 Web site www frigomar com eMail frigomar frigomar com USER INSTRUCTION Air Conditioning System Air Conditioning Modular Unit CU50VFD CU70VFD INVERTER DC chiller heat pump ...

Page 2: ...echnicians can perform maintenance 10 3 8 FAN COIL SAFETY RULES 11 4 0 OPERATING 11 4 1 ELECTRONIC CONTROL 11 4 2 DIGITAL DISPLAY CONTROL PANEL 13 4 3 PAGE MENU SETTINGS 1 2 14 4 3 1 Running status 15 4 3 2 T status 16 4 3 3 C F unit measurement selection 17 4 3 4 Saved alarm shows 17 4 4 PAGE MENU SETTINGS 2 2 18 4 4 1 Clock set Date 18 4 4 2 Chiller operation logic 19 5 0 WORKING LIMITS 19 6 0 W...

Page 3: ...breaks The presence of refrigerant oil usually indicates a rupture in the refrigerant circuit WARNING The chiller heat pump unit is factory charged with refrigerant fluid R410A having ODP 0 and GWP 1890 kg The circuit is completely sealed by soldering therefore a gas leakage is very unlikely to happen However the R410A hazard identification is the following Colourless volatile liquid with ethereal...

Page 4: ...ation of the machine before installation it is possible to replace the 4 M6 screws of the upper aesthetic panel with 4 M6 eyebolts WARNING During the transportation use all individual protection to operate in total safety Once placed the unit is recommended to replace the eyebolts with the M6 screws 3 0 INSTALLATION AND MAINTENANCE ATTENTION Do not stress hydraulic connections To lift or move the ...

Page 5: ...6 of rated voltage with proper phase and frequency WARNING The unit must be properly grounded to reduce the risk of shock or electrocution WARNING The electrical connections must be made to the switchboard located inside the unit and proper external electrical circuit breaker must be used 3 1 UNIT FIXING For fixing the machine there are 4 holes 9x20mm 0 35x0 78 inch on the lower fold of the base T...

Page 6: ...U70VFD 20190108 doc81218 Page 6 of 24 3 2 WIRING DIAGRAMS Fixing holes side accessibility Warning Never remove PCB cover adversely warranty coverage will decline Terminal board To enable Fixing holes accessibility from above ...

Page 7: ...CU70VFD 20190108 doc81218 Page 7 of 24 3 3 TERMINAL BLOCK CONNECTION 18 Max input power Circuit pump fuse Sea water pump fuse CU50VFD 2 2 kW 5 A 5 A CU70VFD 3 8 kW 5 A 5 A Serial number Chiller Power supply 220V 1ph 50 60Hz ...

Page 8: ...the ship s bonding system A zinc anode is mounted at the inlet of cupronickel heat exchanger it must be replaced periodically depending on the degree of wearing Failure to properly ground and bond the system will void the warranty 5 The axial fan help the system to cool the inverter drive during operation Be careful the air intake is not covered or obstructed during operation 3 5 REMOTE CONTROL DI...

Page 9: ...lows Chiller Heat Fresh water flow m3 h Pipe inner Sea water flow m3 h Pipe inner Pump unit min MAX Ø mm min MAX Ø mm CU50VFD 1 5 2 5 25 1 2 1 8 20 CU70VFD 2 2 2 5 25 3 3 4 0 25 Chiller Heat Fresh water flow Pressure drop Sea water flow Pressure drop m3 h Fresh water kPa m3 h Sea water kPa CU50VFD 1 5 30 1 3 60 CU70VFD 2 2 45 3 3 56 Fresh water INLET Fresh water Filter Sea water Zinc anod Sea wate...

Page 10: ...ing dry is not covered under warranty 3 Sea water pump must be sized so that medium water velocity inside the coil is between 2 m s and 3 m s Higher velocity may cause metal erosion while lower velocity may cause coil clogging WARNING Air conditioning unit must be overseen also through suitable protection devices as any eventual breaking of fittings or pipes carrying seawater may have disastrous e...

Page 11: ...y bilge and any other toxic or harmful substance could be introduced in occupied areas 2 Do not install fan coil in rooms where there are flammable fluids 3 The condensate drain pipe must end in an environment free from any toxic or harmful substance 4 Keep the condensate drain pipe end at least 3 m away from the engines exhausts 5 Do not install the fan coil above any electrical and electronic eq...

Page 12: ...FRIGOMAR ENG CU50VFD CU70VFD 20190108 doc81218 Page 12 of 24 ...

Page 13: ...s suction pressure digital input DI 2 Driver SSPM temperature analogical input SSPM Through the parameters analysis and by algorithms the controller manages the operation in cooling and heating mode Abnormal operations values out from the defined ranges are immediately detected and displayed and the unit modifies the operation or stops working under defined conditions It is possible to verify and ...

Page 14: ...eating or vice versa the compressor must stop for 3 min before restarting while the fresh water pump keeps running and the seawater pump stops as the compressor stops and restarts slightly before the compressor restarts as usual 3 SET by touching the symbol SET we get access to the page MENU and SETTINGS 4 ALARM by touching the symbol we get access to Saved Alarm Show page Alarm reset by pressing ...

Page 15: ...mbol we get access to a page where the following parameters are listed SSPM temperature accuracy 0 1 C SSPM EEV steps range 0 480 steps Frequency set range 0 100 Hz Frequency real range 0 100Hz Gas superheating calculation as a difference between Suction Gas Temperature and Evaporation Gas Temperature ...

Page 16: ...r temp outlet accuracy 0 1 C Tswi Sea water temperature inlet accuracy 0 1 C Tswo Sea water temperature outlet accuracy 0 1 C Tgd discharge gas temperature accuracy 0 1 C Tgs Suction gas temperature accuracy 0 1 C Tge Evaporation gas temperature from pressure transducer R410A or other future refrigerants 0 20 bar Tgc Condensing gas temperature from pressure transducer if available for R410A or oth...

Page 17: ...nd time There is a maximum number e g 20 of saved alarms so that once the memory saturated the new alarm will enter at the top of the list while the alarm at the bottom will be delated in order to create the new space The possible alarms are the following Chiller Alarms are displayed with the complete description Txx description probe unreliable to be included also the pressure transducers failure...

Page 18: ... discharge temperature Fresh water flow alarm Seawater low temperature Fresh water low temperature 4 4 PAGE MENU SETTINGS 2 2 To input the number when touching any input number area a simple calculator input window will be showed Once finish the input and press OK the number will be changed This can be suitable for date hour setting and password input 4 4 1 Clock set Date hour 0 24 min date year m...

Page 19: ... time This can clog strainers water pumps and heat exchangers in a little while causing shut down faults and sometimes equipment damage In such particular conditions please seek the advice of a local Frigomar service representative Any possible modification to the overall system chiller pumps strainers etc that could overtake the problem must be approved by Frigomar otherwise warranty coverage wil...

Page 20: ...ranty Coverage Period begins from the date of possession of the boat by the original owner if OEM installed or from the date of installation if the Frigomar product is installed by a dealer However the Warranty Coverage Period will not exceed 3 years from date of manufacture The Warranty is transferable and will carry any remaining Warranty Coverage Period The Warranty Coverage Period does not res...

Page 21: ...nd liability of the owner 6 3 WARRANTY CONDITIONS The intervention must be prior authorized by Frigomar Customer Service tecnico frigomar com All the parts delivered by Frigomar bear a data plate reporting model and serial number the owner shall give to Frigomar Customer Service all this information related to the faulty parts Normally the preferred way is to e mail the data plate photos Frigomar ...

Page 22: ...sters flooding fire submerge any water leakage or use contrary to instructions Items not manufactured by Frigomar Transport product damage as a result of improper return packaging or other freight damage Negligent servicing Wrong electrical and hydraulic connections Power supply not in according to manufacturer s specifications Fresh water frosting chilled water circuit Exterior corrosion electrol...

Page 23: ... prevent the presence of residual amounts of refrigerant in the lubricating oil Complete emptying before returning the compressor to the manufacturer Pay attention to safety when draining the oil from the system NOTE _________________________________________________________________________________________________ _____________________________________________________________________________________...

Page 24: ...4788 Web site www frigomar com eMail frigomar frigomar com FRIGOMAR S r l we reserve the right to make changes to products as it deems necessary or useful without affecting Their main features The technical data presented in this document are not binding FRIGOMAR S r l we reserve the right to make any changes at any time deemed necessary to the improvement of the product ...

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