A23-1565, A23-1567, A23-1570 | Carrier HFC-134A manual

SHIPPING

BRACKET

a23-1565

Fig. 16 — VFD Shipping Bracket

3.	Remove the nuts that secure the terminal box transition
	piece to the motor housing.
4.	Disconnect the motor leads from the motor terminals
	(Fig. 17). Note the position of the motor terminal cable
	lugs so they can be reinstalled with sufficient clearance
	away from surrounding structure.
5.	Remove the motor temperature sensor leads (Fig. 17), the
	motor ground lead, and the bolts that secure the VFD

a23-1567

Fig. 18 — ICVC Communication Cables

	enclosure to the terminal box transition piece.
6.	Disconnect the communication cables from the back of
	the ICVC (Fig. 18).
7.	Disconnect the high pressure switch leads from terminal
	strip TB1, terminals 15 and 16 (Fig. 19).
8.	Unplug connectors CN1A, CN1B, CN2, and CN3
	(Fig. 19).
9.	Disconnect the control panel ground wire (Fig. 19) that is
	located next to connectors CN1A and CN1B.
10.	Disconnect the VFD cooling lines (Fig. 20) and cover all
	openings.
11.	Remove the 12 screws that secure the control panel to the
	VFD enclosure. Tilt the control panel away from the back
	of the control center.
12.	Position the control panel on top of the condenser and
	secure it in place to prevent damage.

MOTOR TERMINALS

MOTOR TERMINAL

BOX FRAME

MOTOR

TEMPERATURE

SENSOR TERMINAL

BLOCK

MOTOR
TEMPERATURE	a23-1566
CABLE	a23-1566

CONNECTOR CN2

a23-1570

	CONTROL PANEL
CONNECTOR CN1A	GROUND WIRE

CONNECTOR CN1B

HIGH

PRESSURE

SWITCH

CABLE

LOW VOLTAGE FIELD

WIRING TERMINAL STRIP

CONNECTOR CN3

Fig. 17 — Motor Terminals

Fig. 19 — Control Panel Connectors

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.