Indoor Unit

Appearance

Figure 2-3 Dimensions (unit: mm)

(1) Cabinet connecting kit	(2) Display module	(3) Door lock	(4) Front door
(5) Mounting hole	(6) Side panel	(7) Rear door	(8) Anchor

Figure 2-4 Holes

(1) Power cable hole (Φ28 mm) on the top	(2) Humidifier water inlet pipe hole (Φ43 mm) on the top
(3) Skylight signal cable hole (Φ28 mm) on the top	(4) Refrigerant gas pipe hole (Φ43 mm) on the top
(5) Refrigerant liquid pipe hole (Φ43 mm) on the top	(6) Drainpipe hole (Φ43 mm) on the top
(7) Signal cable holes (Φ28 mm) on the top	(8) Power cable hole (Φ28 mm) at the bottom
(9) Humidifier water inlet pipe hole (Φ43 mm) at the bottom	(10) Refrigerant gas pipe hole (Φ60 mm) at the bottom
(11) Drainpipe hole (Φ60 mm) at the bottom	(12) Refrigerant liquid pipe hole (Φ60 mm) at the bottom
(13) Signal cable hole (Φ28 mm) at the bottom

Interior Components

The NetCol5000-A mainly consists of a DC variable-frequency compressor, EC fan, evaporator, electronic expansion valve (EEV), oil separator, sight glass, filter dryer, air filter, electric heater (optional), wet film humidifier (optional), condensate pump (optional), differential pressure switch, and temperature and humidity sensor (T/H sensor).

Figure 2-5 Components

(1) Fan	(2) Condensate pump
(3) Drainage check valve	(4) Electric heater
(5) Electrical box	(6) Evaporator
(7) Wet film humidifier	(8) Compressor
(9) Filter dryer	(10) Oil separator
(11) EEV	(12) Drive
(13) T/H sensor	(14) Extra-low voltage (ELV) box
(15) Signal cable terminal block	(16) Differential pressure switch

• Compressor

  • The smart cooling product uses a DC variable-frequency compressor that features compact size, light weight, a long service life, low noise, easy installation, high reliability, stability, and energy efficiency.
  • The high-precision drive automatically adapts to the system pressure fluctuations.
  • The drive conducts precision self-check. Compressor and drive faults are separated.

• EC fan

  • The energy-efficient EC fan that supports stepless speed adjustment is used to reduce the fan energy consumption.
  • There are 10 EC fans in total. The smart cooling product will not shut down if a single fan fails.
  • Fans can be maintained with power-on. You can replace one faulty fan without shutting down the smart cooling product.

• Evaporator

  • The evaporator adopts the inner threaded copper pipe and blue hydrophilic aluminum foil to prevent water blowing due to condensate water accumulation and improve heat exchange performance. The V-shaped evaporator optimizes the airflow organization and reduces the air resistance.
  • The finned-tube evaporator with a high cooling efficiency adopts the synergy field principle and computational fluid dynamics (CFD) to optimize the flow path design, which greatly improves the heat exchange efficiency.
  • The small-diameter tubes are adopted to enhance the heat exchange performance, increasing the heat exchange efficiency by more than 10% when compared with a traditional solution.
  • The designed pressure bearing capacity of the heat exchange coil is 4.35 MPa, providing excellent pressure resistance capability.

• EEV

  • The throttling device uses a miniature controller to control the operation of the step motor, thereby changing the pass-through area of the EEV to regulate the flow of refrigerant.
  • The main control module contains an EEV energy storage unit to prevent slugging due to refrigerant migration after an unexpected power-off.

• Oil separator

  The oil separator separates the lubricant brought out due to discharge of the compressor and brings back the separated lubricant to the compressor.

• Sight glass

  The sight glass allows users to observe the refrigerant flow and the content of gas and liquid for easy maintenance and optimization.

• Filter dryer

  The filter dryer absorbs water from the refrigerant pipes and filters out the foreign matter, which reduces component damage rates and improves operating efficiency and reliability.

• Air filter

  The G4 air filter is used.

• Electric heater

  • The positive temperature coefficient (PTC) electric heater automatically adjusts heating capacity and provides multiple protection measures to ensure safe and reliable operation.
  • The heater features quick start, large heating capacity, and even heating.

• Wet film humidifier

  • The wet film humidifier has low water quality requirements and high environment adaptability.
  • Uses a simple structure and is easy to remove, clean, and maintain.
  • Quickly starts and generates huge humidification capacity.
  • Consumes low power, saving more than 95% energy compared with a traditional electrode humidifier.
  • Provides a longer service life and maintenance interval than a traditional electrode humidifier.

• Condensate pump

  The water pump provides power for top drainage with a maximum lift of 4 m.

• Check valve

  The check valve effectively prevents gas or liquid backflow.

• Differential pressure switch

  When the air filter is dirty or blocked, the differential pressure switch triggers an alarm, prompting for air filter replacement.

• T/H sensor

  The smart cooling product contains the negative temperature coefficient (NTC) temperature sensor and the return air T/H sensor.