Compact condensing units are characterized by small size, simplicity and convenience. They consist of a hermetic compressor and a condenser and on site they are connected to the evaporator. They are designed for small refrigeration capacities and use traditional refrigerants (HFC).
In the offer is a large selection of hermetic compressors for various manufacturers. Also, there are available the various dimensions of the condenser assembly. For condenser are used air copper tube exchangers with aluminum fins.
Condensing units are assembled devices which are composed of the compressor and condenser. The condenser can be air or water-cooled, which greatly affects on the dimensions of the unit and unit look. Condensing units are manufactured in a wide range of cooling capacity and are characterized by their reliability and ease of use.
Air cooled condensing units
Air-cooled condensing units are primarily intended for outdoor use. Can be connected to one or more evaporators. Mostly they are intended for synthetic refrigerant (HFC), but also may use a natural refrigerant such as propane.
Offered compressors are hermetic scroll and semi-hermetic reciprocating compressors from reputable manufacturers. May be incorporated one or more compressors (up to 4) and can be connected in series or parallel depending on the installation site of the device. Condensers are the aluminum micro-channel condensers which reduces weight and refrigerant charge.
Offered fans are axial fans from renowned manufacturer Ziehl Abegg. It is recommended to use fans of the last ZAplus generation, which are characterized by high efficiency, high air flow and low noise, but also are availavle other series of axial fans of the same manufacturer, depending on customer needs.
Water cooled condensing units
Water-cooled condensing units are assemble of compressor and a water condenser. Units can be for outdoor and indoor installation. The most commonly are used synthetic refrigerants (HFC). Units can be also made for for natural refrigerants such as propane.
A wide range of compressors is available, as well as at the air-cooled condensing units. Water condensers are plate heat exchangers which are characterized by compact dimensions, high heat transfer coefficient and low pressure drop. in the unit can be installed a three-way valve on the water side ensuring safe and proper operation of the device.
RACKS or multicompressor sets usually consist of multiple compressors connected in parallel operation. They are equipped with a suction collectors and systems for active oil return in the compressor and the necessary electronics for operation of the device. RACKS are attractive devices, because condensers and evaporators are not installed on the set. This design allows that the RACKS is installed in a place where it does not take useful space and on the device can be connected more evaporators which are located in separate rooms.
RACKS cover a wide range of refrigeration capacity. A large number of possibilities for performance of these devices make them attractive for commercial refrigeration.
RACKS can be made without regulation capacity (on / off operation) and with the control capacity. For the step capacity control are used capacity control valves on the compressor head. Built-in electronics determines the mode of the device. For more precise capacity control is mounted frequency converter.
To easy start of the device it can be installed unloaded start valves. They not only make it easier to start the compressor, but also significantly reduce the start current of the compressor.
Chillers are part of Frigo Plus production program “Smart & Natural Cooling”. The units are used for indirect cooling, which means that the building is cooled with heat transfer fluid. Heat transfer fluid can be water or a mixture of water and ethylene glycol or propylene glycol.
As the unit is intended for indirect cooling, all the components of the refrigerant circuit are built into the unit. Thus, chillers is compact and easy to install on the site. Refrigerant is propane (R290), which due to its excellent thermodynamic properties allows the use of the chiller in the temeprature range from -35 to 20 °C. A microprocessor controls the operation of the unit and optimized parameters in order to achieve as higher efficiency.
Air cooled chillers
Air cooled chillers have air microchannel aluminum condensers paired with axial fans.
Air cooled chillers are divided into 3 subgroups according to the cooling capacity that cover:
- MINI LINE – up to100 kW
- MODULAR – up to 200 kW
- V-LINE – from 100 to 1000 kW
- MINI LINE is the smallest subgroup and only have one compressor. It is suitable for small refrigeration capacities and is characterized by small size, quiet operation, simplicity and reliability.
- MODULAR subgroup is larger in size which allows the installation of special equipment such as an integrated heat exchanger for free cooling, 100% recovery of waste heat and the desuperheater.
- V-LINE subgroup is known for its V design of condenser battery. Wide range of models can cover all the needs of customers. Models with semi-hermetic reciprocating compressors can have up to 4 compressors and models with efficient screw compressors up to 2 compressors. Also, units can have special equipment for the return of waste heat recovery or free cooling module. Advanced microprocessor control automatically manages and controls the unit operation and with the additional equipment it is possible to remote monitor and control the unit operation.
Water cooled chillers
Water cooled chillers have water condensers and simply design, because water condensers are inside the unit. Condensers are plate heat exchangers, with compact size and high heat transfer coefficient. Condensers, as well as evaporators, are connected to a collector which reduces the number of ports on 2 pairs of connections.
Water cooled chillers are intended for indoor installation in the engine room. They cover a wide range of refrigeration capacity, up to 800 kW for standard working conditions. Model of the units can have up to 4 semi-hermetic compressor and a microprocessor controls the operation of devices.