CONTROL SETTINGS

DIAL

 

 

RELATIVE

 

CONTROL

 

HUMIDITY (%)

 

SETTING

 

 

CURVE

20

 

50

 

80

 

 

 

 

A

78 F

 

73 F

 

68 F

A

(26 C)

 

(23 C)

 

(20 C)

 

 

 

 

B

73 F

 

68 F

 

63 F

B

(23 C)

 

(20 C)

 

(17 C)

 

 

 

 

C

68 F

 

63 F

 

59 F

C

(20 C)

 

(17 C)

 

(15 C)

 

 

 

 

D

62 F

 

58 F

 

53 F

D

(17 C)

 

(14 C)

 

(12 C)

 

 

 

 

Fig. 24 Ð Enthalpy Control Settings

Supply-Air Temperature Sensor (Fig. 25) Ð The supply-air temperature sensor (SAT) measures the tempera- ture of the air as it leaves the supply fan. The sensor is factory- installed on the fan scroll.

Return-Air Temperature Sensor (Fig. 25) Ð The return-air temperature sensor (RAT) is shipped inside the fan section. It measures the temperature in the return air duct. Mount the sensor in the middle of the return air duct ap- proximately 4 to 5 ft from the return air damper. The sen- sor's probe tip must be within a straight length of duct.

Mount the sensor as follows:

1.Remove the cover of the sensor junction box.

2.Drill or punch a 5¤16-in. hole on the centerline of the re- turn air duct as indicated in Fig. 26.

3.Drill or punch 2 holes through the sensor gasket into the fan scroll.

4.Remove the adhesive backing from the gasket; attach the gasket to the outside of the junction box, aligning the holes in the gasket with the holes in the box.

5.Attach the junction box to the duct with the 2 screws provided.

6.Insert the probe assembly through the compression ®t- ting and into the duct. Tighten screws one half-turn past ®nger tight. Do not overtighten.

For distances up to 500 ft, use 2-conductor 20 AWG cable to connect the sensor to the PIC control box terminals. Refer to Field Wiring Connections section, page 32 for further de- tails. See Table 3 for thermistor resistance vs. temperature values.

Fig. 25 Ð Supply/Return Air Temperature Sensor

(P/N HH79NZ019)

Fig. 26 Ð Return-Air Temperature Sensor

Installation

44

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Carrier 39L specifications Enthalpy Control Settings, Supply/Return Air Temperature Sensor HH79NZ019

39L specifications

The Carrier 39L is a cutting-edge air conditioning unit designed for both residential and commercial applications, providing exceptional cooling and heating performance. Equipped with advanced technologies, this system ensures optimal climate control while maintaining energy efficiency.

One of the standout features of the Carrier 39L is its inverter technology. This innovation allows the system to adjust its compressor speed based on the ambient temperature, which results in a significant reduction in energy consumption. By operating at varying capacities rather than a fixed output, the 39L can maintain a consistent temperature, enhancing comfort while lowering electricity bills.

The Carrier 39L also includes a high-efficiency air filtration system, designed to capture dust, allergens, and other airborne particles. This not only improves indoor air quality but also promotes a healthier living environment. The filtration system is complemented by anti-bacterial treatment, ensuring that the air circulated within your space is both clean and refreshing.

In terms of design, the Carrier 39L boasts a sleek and compact form factor, making it easy to integrate into various settings, from homes to offices. Its quiet operation is another notable feature, as it minimizes noise levels, allowing occupants to enjoy a serene atmosphere without disruptive sound.

Further enhancing convenience, the Carrier 39L comes equipped with smart connectivity options. Users can control the unit remotely via a smartphone app, making it easy to adjust settings, program schedules, and monitor energy usage from anywhere. This feature not only improves user experience but also supports energy-saving practices.

Durability is also a key characteristic of the Carrier 39L. Constructed with high-quality materials and coated with corrosion-resistant treatments, the unit is built to withstand various environmental conditions. This ensures long-lasting performance and reduces the need for frequent maintenance.

Overall, the Carrier 39L is a versatile, efficient, and user-friendly air conditioning solution. Its blend of advanced technologies, energy-saving capabilities, and robust design makes it an ideal choice for those seeking reliable climate control in their spaces. Whether for residential comfort or commercial necessity, the Carrier 39L stands out as a leader in modern air conditioning.