Instructions
6 | AN405821998738en-000102 - 118A5495A
© Danfoss | Climate Solutions | 2023.02 | LCA012A024
1 – Introduction
These instructions pertain to Optyma
TM
iCO2 condensing units OP-UPAC015COP04E used for refrigeration applications. They provide necessary information regarding
safety and proper usage of this product.
The condensing unit includes following:
• Inverter Compressor ( Rotary)
• 2 parallel gas cooler (Coated fin and tube Heat exchanger)
• Unit controller
• 2 DC fan Assembly
• Receiver
• High pressure switch
• The condensing unit assembly is CE, PED certified CAT II
• This condensing unit controls its capacity by the speed control by means of inverter.
• Compressor is connected to the inverter, and operated at variable speed. The inverter changes the power supply frequency supplied to the compressor of which
speed changes nearly proportional to this frequency. The capacity is controlled in this way.
• Whether the load is high or low it is judged by detecting the low pressure (LP) of compressor. If the low pressure (LP) is high, it is judged that the load is high so that
the output capacity of condensing unit is increased.
• The speed control by inverter features that it allows to change the capacity.
• Since the inverter is in the advancing phase, if an advancing capacitor is installed, the power factor drops in reverse. Never install an advancing capacitor, because it may be
broken.
Caution for avoiding noise problem:
1. Ground equipment always
• Use a dedicated grounding always. Grounding / earthing type TN system.
• Ground as close as possible to the refrigerating machine, with a cable as short as possible.
2. Separate lines of the power supply cable and the power cable of other devices.
3. Where the unit is installed close to a device that emits electromagnetic radiation, install it avoiding the radiating plane from being directed to the
electric equipment box on the unit.
To prevent electromagnetic interference on other device
1. Inverter operation loads noise to the power cable, which could interfere with neighboring devices. Take care of following matters to prevent
complaints on noise.
• Separate the refrigerating machine and power supply wiring from receiving devices more than 3 m.
• Pass the power supply cable through a metal pipe. Make sure to ground the pipe.
• Ground the refrigerating machine and the receiving devices individually and independently.