HFC134a Service Information. Maytag MQU1556AEW, AFU2067BW, MQU1554AEW, AQU1525AEW, AFU1505BW, AFU1767BW, MQU2056ARW, AFU1567BW, AFU1705BW, AFU2005BW

Service Information

!

WARNING before attempting to service unless test procedures require power to be connected. When removing any wiring from terminals, replace on the same terminals. Ensure all ground wires are connected before certifying unit as repaired and/or operational.

To avoid risk of electrical shock, personal injury or death, always disconnect electrical power source to the freezer

HFC134a Service Information

HFC134a Refrigerant

HFC134a is alternative refrigerant for CFC12. HFC134a has an ozone depletion potential (ODP) factor of 0.0 and a global warming potential (GWP) factor of 0.27.

HFC134a is not flammable and has acceptable toxicity levels. HFC134a is not interchangeable with CFC12.

There are significant differences between HFC134a and

CFC12 which must be considered when handling and processing refrigeration system.

Health, Safety, and Handling

Health, safety and handling considerations for HFC134a are virtually no different than those for CFC12.

Comparison of CFC12 and HFC134a:

Properties/Characteristics

Ozone Depletion Potential (ODP)

Global Warming Potential (GPW)

Molecular weight

Boiling point at 1 atmosphere

CFC12

1.0*

HFC134a

0.0*

3.2*

121

0.27*

102

-22°F (-30°C) -15°F (-26°C)

Vapor pressure at 77°F (25°C)

Liquid density at 77°F (25°C)

80 psig

82 lb/ft3

82 psig

75 lb/ft3

Flammability No No

High-side system operating HFC134a approximately 3 psig

Pressure at 65°F (18°C) ambient higher than CFC12

Low-side system operating HFC134a approximately 2 psig

Pressure at 65°F (18°C) ambient lower than CFC12

* Compared to CFC 11 = 1

Health, Safety, and Handling

Allowable overall exposure limit

Vapor exposure to skin

Liquid exposure to skin

Vapor exposure to eye

Liquid exposure to eye

Above minimum exposure limit

Safety and handling

Spill management

Fire and explosion hazards

Storage conditions

Disposal procedures

CFC12

1,000 ppm

No effect

Can cause frostbite

Very slight irritant

Can cause frostbite

Can cause Asphyxiation,

Tachycardis, and Cardia

Arrhythmias

Wear appropriate skin and eye protection. Use with adequate ventilation.

Remove or extinguish ignition or combustion sources. Evacuate or ventilate area.

May decompose if contact with flames and heating elements.

Container may explode if heated due to resulting pressure rise.

Combustion products are toxic.

Procedures/rules for

CFC12 also apply for

HFC134a.

Recycle or reclaim

Same

Same

Same

Same

Same

Same

Same

Same

Same

Same

HFC134a

©2004 Maytag Services 16023585 43