Air PreciseAIR PCA Series, Инструкция по установке, эксплуатации и обслуживанию

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IOM-PreciseAIR
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Series PHW chilled water units are equipped with a single chilled water cooling coil. Furnishing
coils with a corrosion resistance coating is an option.
Compressors
DX systems are provided with scroll compressors with R-410a refrigerant. The lead compressor is
provided with a VFD for capacity modulation.
Condensers
Series PPW units will be equipped with water cooled shell and tube condenser(s).
Series PCA and PPA units will be equipped with an air cooled condenser with vertical air flow.
Expansion Valves
DX units are equipped with one externally adjustable thermostatic expansion valve per refrigerant
circuit. The expansion valve controls the flow of liquid refrigerant entering the coil by maintaining
a constant superheat of the refrigerant vapor at the outlet of the coil.
Filter Driers
Each refrigeration circuit is equipped with a filter drier with replaceable drier core for durability
in the most aggressive environmental applications.
High and Low Pressure Cutout Switches
Each refrigerant circuit is equipped with a high and low pressure cutout switch for safety control.
The compressor motor is de-energized when the discharge or suction pressure of the compressor
becomes excessive. This prevents possible compressor damage.
Relief Valves
Each refrigerant circuit is equipped with a pressure relief valve to limit the pressure in the circuit
to a safe level. The pressure is relieved by allowing the refrigerant to flow through an auxiliary
passage out of the system.
Sight Glasses
Each refrigerant circuit is equipped with a sight glass to provide accurate identification and better
visibility of system conditions through a large viewing window with indicator.
Water Regulating Valves
Each water cooled condenser is equipped with a pressure actuated valve, which is used for
regulating the flow of water in the condenser. The water regulating valves modulate to maintain
constant condensing pressure during operation.