Separate Machine Components — The design of the 23XRV allows for disassembly at the job site so that individual components may be moved through existing door- ways. Use the following procedures to separate the machine components.

Suggested locations to cut piping will minimize the width of the condenser/economizer assembly.

SEPARATE COOLER AND CONDENSER

IMPORTANT: If the cooler and condenser vessels must be separated, the heat exchangers should be kept level by placing a support plate under the tube sheets. The support plate will also help to keep the vessels level and aligned when the vessels are bolted back together.

NOTE: For steps 1 through 13 refer to Fig. 12. The cooler has been removed from the picture to show the pipes and lines that must be cut.

Check that the holding charge has been removed from the chiller.

1.Place a support plate under each tube sheet to keep each vessel level.

2.Remove cooler relief valve and relief valve vent piping.

3.Cut the motor cooling refrigerant drain line.

4.Rig the suction elbow and disconnect the compressor suction line at the cooler and compressor. Remove bolts from the vaporizer vent line flange.

5.Cut the VFD cooling drain line.

6.Cut the oil reclaim line(s).

7.Cut the hot gas bypass line between the HGBP (hot gas bypass) solenoid valve and the cooler feed line.

8.Unbolt the cooler liquid feed line near the economizer or condenser float chamber at the flanged connection. Temporarily secure the in-line economizer orifice plate (economized chillers only) to the economizer flange (see Fig. 12).

 

17

19

 

 

 

 

18

 

1

 

 

16

 

 

 

 

 

 

 

2

 

 

15

 

 

 

3

 

 

 

 

 

 

14

 

 

 

4

 

 

 

 

 

5

 

5

 

 

 

 

 

 

 

 

 

6

 

 

 

 

 

5

 

13

12

 

 

 

 

 

 

 

 

 

 

11

 

10

7

 

 

 

 

9

 

a23-1560

 

 

 

 

 

 

8

 

1

— Suction Elbow (Unbolt)

 

11

— VFD Cooling Drain Line

 

2

— Vaporizer Vent Line (Unbolt)

 

12

— Oil Reclaim Line (Cut)

 

3

— Motor Cooling Line (Unbolt)

 

13

— Vaporizer Hot Gas Return Line (Cut)

4

— Motor Cooling Drain Line (Cut)

14

— Discharge Isolation Valve (Optional)

5

— Tubesheet Mounting Bracket

 

15

— Condenser Relief Valves (Unscrew)

6

— Bearing Oil Drain Line

 

16

— Discharge Temperature Sensor

7

— Support Plate

 

17

— Discharge Pipe Assembly Relief Valve (Unscrew)

8

— In-Line Economizer Orifice Plate

18

— Discharge Pressure Sensor

 

9

— Cooler Liquid Feed LIne (Unbolt)

19

— Discharge Pressure Switch

 

10— Hot Gas Bypass Line (Cut)

Fig. 12 — Cooler/Discharge Pipe Assembly Removal

13

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Image 13
Carrier HFC-134A installation instructions Cooler/Discharge Pipe Assembly Removal
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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.
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