Amana Bottom Mount Refrigerator Manual De Usuario

November 1996

13

RS1200001

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 considerations for
HFC134A are virtually no different than those for
CFC12.

Allowable overall exposure limit

1,000 ppm

Same

Vapor exposure to skin

No effect

Same

Liquid exposure to skin

Can cause frostbite

Same

Vapor exposure to eye

Very slight irritant

Same

Liquid exposure to eye

Can cause frostbite

Same

Above minimum exposure limit

Can cause Asphyxiation,  

Same

 

Tachycardia, and Cardia 
Arrhythmias

Safety and handling

Wear appropriate skin and eye 

Same

protection.  Use with adequate 
ventilation.

Spill management

Remove or extinguish ignition or 

Same

combustion sources.  Evacuate
or ventilate area.

Fire and explosion hazards

May decompose if contact with 
flames and heating elements.  
Container may explode if heated
due to resulting pressure rise.  
Combustion products are toxic.

Storage conditions

Procedures/rules for CFC12  

Same

also apply for HFC134a

Disposal procedures

Recycle or reclaim

Same

Ozone Depletion Potential (ODP)

1.0*

0.0*

Global Warming Potential (GPW)

3.2*

0.27*

Molecular weight

121

102

Boiling point at 1 atmosphere

-22°F (-30°C)

-15°F (-26°C)

Vapor pressure at 77°F (25°C)

80 psig

82 psig

Liquid density at 77°F (25°C)

82 lb/ft3

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

To minimize contamination, exercise extreme
care when servicing HFC134A sealed systems.

• No trace of other refrigerants is allowed in HFC134a

systems. Chlorinated molecules in other refrigerants
such as CFC12, etc. will lead to capillary tube
plugging.

• Ester oil is used in HFC134a systems. Do not use

mineral oil. HFC134a and mineral oils cannot be
mixed. If mineral oils were used in HFC134a systems,
lubricant would not return to compressor and would
cause early compressor failure. If significant amount
of oil has been lost from compressor, replace oil
rather than adding oil.

• Ester oils used in HFC134a systems are so

hydroscopic that by the time an inadequate system
performance is detected, oil will be saturated with
moisture.

• CFC12 has much higher tolerance to system

processing materials, such as drawing compounds,
rust inhibitors, and cleaning compounds, than
HFC134a. Such materials are not soluble in HFC134a
systems. If materials were to be washed from system
surfaces by ester oils, they could accumulate and
eventually plug capillary tube.

• Care must be taken to minimize moisture from

entering HFC134a system. Do not leave compressor
or system open to atmosphere for more than 10
minutes. Excessive moisture in HFC134a system will
react with compressor oil and generate acid.

• Compressor must be replaced when performing low

side leak repair.

• Drier filter must always be replaced with service drier

filter, part #B2150504.

Important: Unbrazing drier filter from tubing will drive
moisture from desiccant and into system, causing
acids to form. Do not unbraze filter drier from tubing.
If CFC12 service drier was installed in HFC134A
system, drier could overload due to excessive
moisture.

• HFC134a compatible copper tubing,

 part

#R0174075 (1/4" O.D. X 18" length) and part
#R0174076 (5/16" O.D. X 24" length) must be used
when replacing tubing.

• Avoid system contamination by using Towerdraw

E610 evaporating oil, part # R0157532, when flaring,
swaging, or cutting refrigeration tubing.