Service Information
To avoid risk of electrical shock, personal injury or death,
always disconnect electrical power source to the freezer
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.
WARNING
©2004 Maytag Services 16023585 43
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.
Health, Safety, and Handling CFC12 HFC134a
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,
Tachycardis, and Cardia
Arrhythmias
Same
Safety and handling Wear appropriate skin
and eye protection. Use
with adequate
ventilation.
Same
Spill management Remove or extinguish
ignition or combustion
sources. Evacuate or
ventilate area.
Same
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 also apply for
HFC134a.
Same
Disposal procedures Recycle or reclaim Same
Comparison of CFC12 and HFC134a:
Properties/Characteristics CFC12 HFC134a
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 Next Page