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Carrier 69NT20-531-300 manual In-lbs #10 Ft-lbs 12.72 17.14, In-lbs Ft-lbs 13.99 18.86

Models: 69NT20-531-300

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6.25COMMUNICATIONS INTERFACE MODULE INSTALLATION

CB1

Communications

interface Module

 

Figure 6-25. Communications Interface

Installation

Units with communication interface module provision have the required wiring installed. The provision wiring kit (part number 76-00685-00), includes three pre-addressed wires installed between the circuit breaker and communication interface module locations. These wires are to be connected to the module and circuit breaker to allow the module to communicate over the power system. To install the module, do the following:

WARNING

The Unit Power Plug Must Be Disconnected

To Remove Power From Circuit Breaker

Cb1

a..CB1 is connected to the power system, see wiring schematic. Ensure that the unit power is off AND that the unit power plug is disconnected.

b..Open control box, see Figure 6-25 and remove low voltage shield. Open high voltage shield.

c..Remove the circuit breaker panel, with circuit breaker, from the control box.

d..Locate, wires CB21/CIA3, CB22/CIA5 and CB23/CIA7 that have been tied back in the wire harness. Remove the protective heat shrink from the ends of the wires.

e..Attach the three wires as addressed to the LOAD side of the circuit breaker.

f..Refit the circuit breaker panel.

g.Fit the new RMU into the unit.

h.Remove plugs CIA, CIB and CID from the wiring harness and attach to the module.

.i. Replace the low voltage shield.

Table 6-6 Recommended Bolt Torque Values

BOLT DIA. THREADS

TORQUE

MKG

 

FREE SPINNING

 

#4

40

5.2 in-lbs

0.05

#6

32

9.6 in-lbs

0.11

#8

32

20 in-lbs

0.23

#10

24

23 in-lbs

0.26

1/4

20

75 in-lbs

0.86

5/16

18

11 ft-lbs

1.52

3/8

16

20 ft-lbs

2.76

7/16

14

31 ft-lbs

4.28

1/2

13

43 ft-lbs

5.94

9/16

12

57 ft-lbs

7.88

5/8

11

92 ft-lbs

12.72

3/4

10

124 ft-lbs

17.14

NONFREE SPINNING (LOCKNUTS ETC.)

1/4

20

82.5 in-lbs

0.95

5/16

18

145.2 in-lbs

1.67

3/8

16

22.0 ft-lbs

3.04

7/16

14

34.1 ft-lbs

4.71

1/2

13

47.3 ft-lbs

6.54

9/16

12

62.7 ft-lbs

8.67

5/8

11

101.2 ft-lbs

13.99

3/4

10

136.4 ft-lbs

18.86

T-309

6-22

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Carrier 69NT20-531-300 manual In-lbs #10 Ft-lbs 12.72 17.14, In-lbs Ft-lbs 13.99 18.86
Page 85 Page 87

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.