MINIWONE

Small-capacity water chiller / heat pump

The MINIWONE series consists of high-efficiency units of very compact design. They are developed to meet the heating or cooling requirements of smaller systems. In cooling mode, the controller operates the unit as a liquid chiller, while in heating mode it operates as a heat pump. MINIWONE units are intended for indoor installation. Outdoor installation is possible with certain modifications.

The compressor is semi-hermetic reciprocating, controlled by a high-efficiency frequency inverter that enables soft start and continuous speed variation for precise cooling/heating capacity control. The evaporator and condenser are plate heat exchangers with advanced heat transfer characteristics (SWEP AsyMatrix technology), ensuring maximum heat transfer efficiency and a significantly reduced refrigerant charge.

MINIWONE units can be designed for high-temperature heating. High-temperature heat pumps use the natural refrigerant R600a to heat water up to 90 °C.

Each MINIWONE unit is factory tested and delivered pre-charged with refrigerant and oil. Conformity assessment is carried out in accordance with the European Pressure Equipment Directive (PED) 2014/68/EU. The unit complies with all safety and environmental requirements.

Number of refrigeration circuits*: 1

*Number of refrigeration circuits equals the number of compressors

Unit dimensions:

• Length: 1660 mm
• Width: 850 mm
• Height: 1300 mm

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GENERAL

• Powder-coated galvanized steel housing, corrosion and weather resistant, standard color RAL 7035
• Removable housing panels
• Anti-vibration mounts
• Compressor compartment located in a separate protective enclosure within the housing
• Pipe insulation to prevent condensation
• Safety strategy selection – permanent compressor compartment ventilation or refrigerant leak detector combined with ATEX fan

ELECTRICAL

• Main power switch and phase monitoring relay
• Electrical protection for all components
• Advanced Siemens microprocessor controller supervising full unit operation
• Electronic expansion valve for precise refrigerant flow control
• Communication protocols: Modbus TCP/IP, Modbus RTU or BACnet IP
• Dry contacts for alarms
• Remote unit access

HYDRAULIC CIRCUIT

• Copper pipes of the hydraulic circuit
• Hydraulic connection via copper threaded connection
• Air vent valve
• Safety valve
• Drain valve (for system filling and draining)
• Flow switch
• Thermal insulation of piping

GENERAL

• Custom housing color
• Low-noise version with additional sound insulation

ELECTRICAL

• Cabinet lamp with socket
• Electrical cabinet heater (250 W)
• Remote monitoring (Siemens Cloud)

HYDRAULIC CIRCUIT

• Shut-off valves
• Primary-side circulation pump (cold side)
• Primary-side circulation pump (hot side)
• Self-regulating heating cables for frost protection
• Hydraulic circuit upgrade using hydromodule