TERMINAL

TERMINAL ENCLOSURE FRAME

 

 

ENCLOSURE

 

 

 

FRAME

 

MOTOR

 

 

MOTOR LEADS

 

 

 

TEMPERATURE

T1

T2

 

SENSOR TERMINAL

 

 

 

BLOCK

 

PROTECTIVE

 

 

 

 

 

T3

EARTH (PE)

 

 

GROUND

CONTROL CENTER

 

 

CONNECTION

THERMAL

INSULATOR INSULATION

FRAME

ASSEMBLY

COMPRESSOR

FOAM

INSULATIONTERMINAL

BOX FRAME

 

 

TERMINAL BOX MOUNTING

a23-1576

SECTION E-E

STUD - DO NOT EXCEED

120 FT-LB TORQUE

 

Fig. 27 — Motor Terminal Box

TERMINAL

TERMINAL

 

 

ENCLOSURE

 

 

BOX

 

 

FRAME

CENTER TERMINAL ENCLOSURE

FRAME

 

 

 

FRAME OVER TERMINAL BOX

WASHER

 

FRAME ASSEMBLY

 

 

 

 

T2

 

 

 

T3

 

 

 

 

 

 

0.38 APPROX.

MOTOR

 

FOAM

 

TERMINAL

 

INSULATION

 

STUD NUTS

 

 

 

 

 

WIRE

MOTOR POWER CABLES

 

 

TIES

(MAY BE 1 OR 2 PER

SECTION C-C

 

 

TERMINAL)

 

 

 

FROM FIG. 27

VIEW LOOKING DOWN

 

 

INTERNAL/EXTERNAL TOOTH

 

LOCK WASHER

 

BETWEEN TERMINAL

 

BOX FRAME AND

 

PE/GROUND CABLE LUG

 

Fig. 28 — Motor Terminal Insulation

21

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Image 21
Carrier HFC-134A installation instructions Motor Terminal Box, A23-1576

HFC-134A specifications

Carrier HFC-134A, also known as tetrafluoroethane, is a hydrofluorocarbon (HFC) refrigerant widely used in a variety of cooling and heating applications. It is recognized for its role in refrigeration and air conditioning systems, making it a crucial component in many modern HVAC units. One of the key features of HFC-134A is its zero ozone depletion potential, which makes it an environmentally friendly alternative to older refrigerants like CFCs and HCFCs.

The characteristics of HFC-134A include its stability, non-corrosiveness, and effectiveness at low temperatures. These properties allow it to perform efficiently in both residential and commercial refrigeration systems. The refrigerant operates within a temperature range that is ideal for many applications, including food preservation and air conditioning. HFC-134A's thermodynamic properties enable it to absorb and release heat effectively, making it suitable for both vapor-compression and absorption refrigeration cycles.

From a technological perspective, the use of HFC-134A aligned with the transition to more sustainable refrigerants. As global environmental regulations have tightened, manufacturers have shifted towards refrigerants with lower global warming potential (GWP). HFC-134A has a GWP of approximately 1,430, which is lower than many of its predecessors but still higher than some newer alternatives. This aspect drives ongoing research and development in the industry, aiming to create even more environmentally sound refrigerants.

Carrier HFC-134A is compatible with various lubricants and can be integrated into systems designed for other refrigerants with minimal modifications. This flexibility allows for a smoother transition within existing installations as businesses and homeowners upgrade their HVAC systems to comply with environmental regulations.

In summary, Carrier HFC-134A plays a significant role in modern refrigeration and air conditioning technology. Its main features, including zero ozone depletion potential, stability, and efficiency, contribute to its widespread use in various applications. As the industry continues to evolve, the focus on reducing the environmental impact of refrigerants will undoubtedly influence the future direction of HFC-134A usage and the development of new alternatives.