Page 36 - Climate Control News Magazine April 2021

Chillers
Plug and play solution saves time
THE FRIGOPACK BLU kompakt from KIMO, the control technology specialist, is a plug-and- play system solution which saves refrigeration technicians a lot of time.
With the new plug-and-play standard switch cabinet, up to two compressors can be operated efficiently with a maximum refrigerating capac- ity of 50 kW.
To commission the FrigoPack BLU kompakt, refrigeration technicians simply connect the power cables to the mains and motor as well as the pressure transmitter and safety circuits and the new standard switch cabinet from KIMO is ready for operation.
Ahmet Kitap, head of applications at KIMO, said the FrigoPack has a wide range of features and an extremely compact design.
“We developed it to help refrigeration techni- cians with their work because a lot more is ex- pected of them these days,” he said.
At the heart of the switch cabinet is the preset FrigoPackE FU+ frequency inverter with smart refrigeration software which controls an entire system with one or two compressors.
“This makes it possible to create systems with a refrigerating capacity of up to 50 kW in no time,” Kitap said.
“Another advantage of the installed frequency inverter is its full text display. It makes the sys- tem easier to operate and key parameters are clearer to read out.
‘Maximising operating reliability is just as in- valuable in the eyes of our customers which is why we designed the FrigoPack so that the switch cabinet initiates emergency service as
soon as a component fails. The result is guaran- teed refrigerating capacity at all times.”
When it comes to system monitoring, the inte- grated FrigoComp control module carries out lots of important tasks. For example, it controls the system status and displays with green and red LEDs. It also monitors the individual compo- nents of the safety circuit separately so problems can be identified and fixed quickly.
‘Our switch cabinet lets users choose between different control types. They can choose be- tween control of a single compressor and cou- pled control of two compressors,” he said.
In the simplest version, when a single com- pressor is frequency-regulated, the maximum rated current of the compressor motor is 45 A. With the dual-compressor solution, the maxi- mum rated current of the compressor motor is 30 A and the contractor can choose between classic control and sequence changing.
With classic control, one compressor is con- trolled by the frequency inverter and the second compressor is supplied directly from the electri- cal supply with on/off control. In contrast, with sequence changing, two identical compressors are speed-controlled alternately, with the other one being set at a fixed speed.
Kitap said this shares the load evenly between the compressors and extends the service life of the system.
As part of the coupled control of the FrigoPackE FU+, the condenser fan is controlled by a 00.10 V signal.
The engineers at KIMO added a motor protection switch for 1 and 3-phase EC motors for this reason.
Inside the FrigoPack.
Smardt’s oil free chiller range
Chiller range gets smart
SMARDT HAS EXPANDED its global oil-free chiller range to 3600TR.
The first Smardt VX water-cooled machine is set to be installed in China and has
demonstrated a COP of 6.83 and an IPLV of 11.86.
The installation is expected to save some 260,000kWh and 259 tonnes of CO2 annu-
ally compared with traditional lubricated centrifugal machines.
Smardt’s V-Class oil-free chiller range is now available from 350 to 3600TR with very
small footprints. Smardt offers R134a and R1234ze refrigerants as standard, with others available as options.
The range offers integrated redundancy and extremely flexible turn-down to five per cent of full-load. Other options include modular and series counter-flow configurations. Smardt systems-integrated design allows continuous chiller operation during com- pressor maintenance – a crucial feature in mission-critical applications like data cen-
tres, pharma manufacturing and district cooling.
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