Carrier 69NT20-531-300 instruction

LIST OF ILLUSTRATIONS

FIGURE NUMBER	Page
Figure 2-1 Refrigeration Unit - Front Section	2-1
Figure 2-2 Evaporator Section	2-2
Figure 2-3 Compressor Section	2-3
Figure 2-4 Condenser Section	2-4
Figure 2-5 Control Box Section	2-5
Figure 2-6 Refrigeration Circuit Schematic - Standard Operation	2-10
Figure 2-7 Refrigeration Circuit Schematic - Economized Operation	2-11
Figure 2-8 Refrigeration Circuit Schematic - Unloaded Operation	2-11
Figure 3- 1 Temperature Control System	3-1
Figure 3- 2 Key Pad	3-2
Figure 3- 3 Display Module	3-2
Figure 3- 4 Control and Expansion Modules	3-3
Figure 3- 5 Standard Configuration Download Report	3-9
Figure 3- 6 Data Reader	3-11
Figure 4-1 Make Up Air Flow Chart	4-1
Figure 4-2 Controller Operation - Perishable Mode	4-4
Figure 4-3 Controller Operation - Frozen Mode	4-5
Figure 4-4 Perishable Mode	4-5
Figure 4-5 Perishable Mode Heating	4-6
Figure 4-6 Frozen Mode	4-6
Figure 4-7 Defrost	4-7
Figure 6-1 Service Valve	6-1
Figure 6-2 Suction Service Valve	6-1
Figure 6-3 Manifold Gauge Set	6-1
Figure 6-4 R-134a Manifold Gauge/Hose Set	6-2
Figure 6-5. Refrigeration System Service Connections	6-3
Figure 6-6. Compressor Service Connections	6-4
Figure 6-7 Compressor Upper Mounting	6-6
Figure 6-8 Compressor Lower Mounting	6-6
Figure 6-9 High Pressure Switch Testing	6-8
Figure 6-10 Thermostatic Expansion Valve Bulb	6-9
Figure 6-11 Evaporator Expansion Valve	6-9
Figure 6-12 Hermetic Thermostatic Expansion Valve Brazing Procedure	6-10
Figure 6-13 Economizer Expansion Valve	6-10
Figure 6-14. Unloader Solenoid Valve	6-11
Figure 6-15. Oil Return Solenoid Valve (ORV), Economizer Solenoid Valve (ESV),
Liquid Injection Solenoid Valve (LIV)	6-11
Figure 6-16. Evaporator Fan Assembly	6-12
Figure 6-17 Suction Modulation Valve (SMV)	6-13
Figure 6-18 Controller Section of the Control Box	6-15
Figure 6-19 Sensor Types	6-16
Figure 6-20 Typical Sensor and Cable Splice	6-17
Figure 6-21 Supply Sensor Positioning	6-18

T309

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.

FIGURE NUMBER

Figure 2-1 Refrigeration Unit - Front Section

Figure 2-2 Evaporator Section

Figure 2-3 Compressor Section

Figure 2-4 Condenser Section

Figure 2-5 Control Box Section

Figure 2-6 Refrigeration Circuit Schematic - Standard Operation

Figure 2-7 Refrigeration Circuit Schematic - Economized Operation

Figure 2-8 Refrigeration Circuit Schematic - Unloaded Operation

Figure 3- 1 Temperature Control System

Figure 3- 2 Key Pad

Figure 3- 3 Display Module

Figure 3- 4 Control and Expansion Modules

Figure 3- 5 Standard Configuration Download Report

Figure 3- 6 Data Reader

Figure 4-1 Make Up Air Flow Chart

Figure 4-2 Controller Operation - Perishable Mode

Figure 4-3 Controller Operation - Frozen Mode

Figure 4-4 Perishable Mode

Figure 4-5 Perishable Mode Heating

Figure 4-6 Frozen Mode

Figure 4-7 Defrost

Figure 6-1 Service Valve

Figure 6-2 Suction Service Valve

Figure 6-3 Manifold Gauge Set

Figure 6-4 R-134a Manifold Gauge/Hose Set

Figure 6-5. Refrigeration System Service Connections

Figure 6-6. Compressor Service Connections

Figure 6-7 Compressor Upper Mounting

Figure 6-8 Compressor Lower Mounting

Figure 6-9 High Pressure Switch Testing

Figure 6-10 Thermostatic Expansion Valve Bulb

Figure 6-11 Evaporator Expansion Valve

Figure 6-12 Hermetic Thermostatic Expansion Valve Brazing Procedure

Figure 6-13 Economizer Expansion Valve

Figure 6-14. Unloader Solenoid Valve

Figure 6-15. Oil Return Solenoid Valve (ORV), Economizer Solenoid Valve (ESV),

Figure 6-16. Evaporator Fan Assembly

Figure 6-17 Suction Modulation Valve (SMV)

Figure 6-18 Controller Section of the Control Box

Figure 6-19 Sensor Types

Figure 6-20 Typical Sensor and Cable Splice

Figure 6-21 Supply Sensor Positioning

69NT20-531-300 specifications