2.1.3 Evaporator Section

The evaporator section (Figure 2-2) contains the return recorder sensor, return temperature sensor, evaporator expansion valve, unloader valve, suction modulation valve, dual-speed evaporator fans (EM1 and EM2), evaporator coil and heater, defrost heaters, defrost temperature sensor, heat termination thermostat and suction temperature sensor.

The evaporator fans circulate air through the container by pulling it in the top of the unit, directing it through the evaporator coil, where it is heated or cooled, and discharging it at the bottom.

The evaporator components are accessible by removing the upper rear panel (as shown in the illustration) or by removing the front access panels.

3

 

5

 

 

 

 

 

 

 

7

 

 

 

 

 

4

 

 

 

 

 

2

 

 

 

 

 

1

 

 

 

 

 

8

 

 

 

 

 

 

 

 

11

12

6

 

10

17

 

9

 

 

 

 

 

 

 

15

 

 

 

 

 

14

 

 

 

 

 

16

 

 

 

 

 

 

 

13

 

 

 

1.

Evaporator Fan Motor #1

10.

Evaporator Expansion Valve

2.

Return Recorder/Temperature Sensor

11.

Low Side Access Valve

3.

Humidity Sensor

12.

Suction Modulating Valve

4.

Evaporator Fan Motor #2

13.

Suction Temperature Sensor

5.

Defrost Temperature Sensor

14.

To Compressor

6.

Heater Termination Thermostat

15.

From Coil

7.

Evaporator Coil

16.

To Coil

8.

Evaporator Coil Heaters

17.

Unloader Solenoid Valve

9.Evaporator Expansion Valve Bulb

Figure 2-2 Evaporator Section

T-309

2-2

Page 16
Image 16
Carrier 69NT20-531-300 manual Evaporator Section

69NT20-531-300 specifications

The Carrier 69NT20-531-300 is a cutting-edge rooftop unit designed to meet the demanding requirements of commercial heating and cooling applications. This model embodies Carrier’s commitment to energy efficiency, reliability, and advanced technological features that enhance indoor comfort while minimizing operational costs.

One of the standout features of the Carrier 69NT20-531-300 is its high energy efficiency. It is equipped with advanced compressor technology that optimizes performance while reducing energy consumption. This ensures that businesses can maintain a comfortable indoor climate without incurring exorbitant utility bills. With a high Seasonal Energy Efficiency Ratio (SEER) and Energy Efficiency Ratio (EER), users can expect not only enhanced comfort but also significant cost savings over time.

The cooling capabilities of the 69NT20-531-300 are complemented by its robust heating options. This unit utilizes a gas heat exchanger, ensuring quick and even heating throughout the space. The combination of cooling and heating capabilities in one compact unit makes it a versatile choice for various applications, including retail spaces, offices, and warehouses.

In addition to its impressive performance specifications, the Carrier 69NT20-531-300 incorporates innovative technologies that further enhance its functionality. The unit comes with advanced controls, allowing for precise temperature regulation and zoning capabilities. This ensures that different areas of a building can maintain their desired temperatures based on usage, improving overall energy efficiency.

Durability is another hallmark of the Carrier 69NT20-531-300. The unit is constructed with high-quality materials and features a weather-proof cabinet that protects it from the elements, ensuring long-term reliability even in harsh conditions. Furthermore, its modular design simplifies maintenance, making it easy for technicians to access critical components.

The 69NT20-531-300 is also designed with low noise operation in mind. It employs sound-dampening technology to ensure that operations are quiet, making it an ideal choice for locations where noise reduction is a priority, such as schools or healthcare facilities.

Overall, the Carrier 69NT20-531-300 stands out as a premier choice for businesses looking for an efficient, reliable, and feature-rich rooftop HVAC unit. Its blend of energy efficiency, advanced technology, and durability positions it as a leader in commercial heating and cooling solutions, making it a valuable investment for any commercial property.