Product description
Before operating the unit, refer to Chiller A2L Refrigerant Application Data, Form 160.00-AD10.
Introduction
YMAE Air-Cooled Modular Chillers and Heat Pumps provide chilled water or hot water for all air
conditioning applications and industrial processes using central station air handling or terminal
units. They are completely self-contained and are designed for outdoor installation, either at
roof or ground level. Each complete packaged unit includes hermetic scroll compressors, plate
heat exchanger, air-cooled ambient coils, R-454B refrigerant charge, and a weather resistant
microprocessor control center, with all these components mounted on a rugged steel base.
The units are completely factory-assembled with all interconnecting refrigerant piping and wiring
ready for field installation. The unit is pressure tested, evacuated, and, in most cases, fully factory-
charged with refrigerant and oil in each of the independent refrigerant circuits. After assembly, an
operational test is performed with water flowing through the heat exchanger to ensure that each
refrigerant circuit operates correctly.
The unit structure is manufactured from heavy-gauge, galvanized steel coated with baked-on
powder paint. Units are designed in accordance with NFPA 70 (National Electric Code), ASHRAE/
ANSI 15 Safety code for mechanical refrigeration, ASME, and rated in accordance with ARI Standard
550/590.
Optional corrosion-resistant wire mesh grills or special quote offering hail guards protect the
condenser coils from external damage and restrict unauthorized access.
General system description
Compressors
YMAE is a direct current (DC) inverter scroll compressors that is driven directly by an external driver.
An acoustic blanket comes as standard on compressors to improve sound levels. Compressor
crankcase heaters are included for extra protection against liquid migration. The inverter scroll
compressors is UL certified.
Refrigerant circuits
Each single module has a dual circuits design.
Each circuit incorporates the following components:
• A suction accumulator.
• A liquid receiver.
• Discharge and suction service ball valves.
• Discharge and suction dual safety relief valves.
• An oil separator, fitted on each of the inverter compressor circuits.
• Electronic expansion valve (EEV).
• Economizer plate heat exchanger (PHE) and enhanced vapor injection (EVI) EEV for enhanced
vapor injection and performance improvement.
• A four-way reversing valve.
The EEV works as the throttle device and supports automatic adjustment of refrigerant flowrate
under optimized conditions to ensure fast cooling or heating, precise temperature control,
and energy saving. It permits operation for both air conditioning, seasonal cooling or heating
applications, and full-year industrial processes at high efficiency, with the benefit of an inverter
compressor and EC fan system.
17YMAE Air-Cooled Inverter Scroll Chiller and Heat Pump
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