Technicians servicing small appliances
except motor vehicle air conditioning must
be certified in refrigerant recovery if...
they perform sealed
system service.
The EPA definition of a small appliance
includes products (3) ----- in a factory
with ----- pounds of refrigerant or less
manufactured,
charged, and
hermetically sealed
5
Persons handling refrigerant during maintenance,
service or repair of small appliances must be
certified as either a ----- or as a -----.
Type I Technician
Universal Technician
If EPA regulations change after a technician
becomes certified, it will be the responsibility of
the ----- to comply with any future changes.
technician
The sale of CFC's and
HCFC's is restricted to -----.
certified technicians
Recovery equipment manufactured before
November 15, 1993 must be capable of removing --
--- of the refrigerant whether or not the compressor
is operating or...
80%
acheive 4 inch vacuum under the conditions of ARI
740
Recovery equipment manufactured after -----
must be certified by an EPA approved testing
laboratory as capable or recovering (3) -----
November 15, 1993
90% if compressor operating
80% no compressor operating
4 inch vacuum under ARI 740
List 2 examples of EPA
certified testing laboratories.
UL (underwriters laboratories)
ETL (edison testing laboratories)
All equipment must be equipped with ----- fittings that
can be -----, or close -----, when hoses are
disconnected to minimize the refrigerant loss
low loss
manually closed
automatically
Does the EPA require leaks for
small appliances be repaired?
No, but leaks should be
repaired whenever possible
Before beginning a refrigerant
recovery procedure, it is necessary
to know...
the type of refrigerant that
is in the system
If a reclamation facility receives a
tank of mixed refrigerant, they may -
---- and -----.
refuse to process the refrigerant
return it at the owner's expense
If a reclamation facility agrees to
destroy a tank of mixed refrigerant,
usually there will be a -----.
substantial fee.
Do not mix ----- in a
recovery tank.
refrigerants
Self-contained (active) recovery equipment has -----
means of removing refrigerant from appliances and
is capable of ----- whether or not the compressor is
operable
it's own
reaching the required recovery rates
Self Contained recovery equipment
stores refrigerant in a -----.
pressurized recovery tank
Before operating a self-contained recovery
machine, make sure that the -----, and that
the recovery tank does not -----.
tank inlet valve is open
contain excessive non-condensibles (air)
Obtaining accurate ----- of refrigerant
inside a recovery cylinders is necessary
to detect excessive non-condensibles.
pressure readings
The only way to read refrigerant
pressure accurately is at a -----.
stable, known
temperature.
Air in a refrigeration system will
cause ----- discharge pressures.
higher
Regarding purging of non-condensables,
follow -----
the operating instructions supplied
by the recovery equipment
manufacturer
All refrigerant recovery equipment
should be check for (2)----- on a daily
basis.
oil level and
refrigerant leaks
A system-dependent (passive)
recovery process for small appliances
captures refrigerant in a -----.
non-pressurized container.
A non-pressurized container
is a container with -----
a special charcoal
activated plastic "bag
System-dependent equipment
captures refrigerant with the
assistance of (3) ----.
the appliance compressor,
an external heat source, or
a vacuum pump.
A standard vacuum pump can only
be used as a recovery device in
combination with a -----.
non-pressurized container
With system-dependent recovery
equipment, some ----- may be necessary,
depending on the ----- of the appliance..
special procedures
condition
When using a system dependent recovery process
on an appliance with an operating compressor, run
the compressor and recover from -----.
the high side of the
system
(operating compressor) Usually one access
fitting on the high side will be sufficient to reach
the required recovery rate, because -----
the appliance compressor should be
capable of pushing the refrigerant to
the high side
If the appliance has a non-operating
compressor, access to ----- may be
necessary
both the high side and the
low side
(non-operating compressor) In order to achieve the
required recovery efficiency, it will be necessary to --
--- to help release trapped refrigerant from the oil.
take measures such as heating and
tapping the compressor several
times and/or use a vacuum pump
Because appliances with non- operating compressors can
not always achieve desired evacuation rates utilizing
system- dependent recovery equipment, the EPA requires
technicians to have - - - - - to recover refrigerant from non-operating
compressors .
at least one self-contained recovery
device available at the shop
The exception to the EPA requiring
technicians to have a recovery device to
for non-operating compressors is -----
if you are a technician that only
works on small appliances.
System dependent devices may only
be used on appliances containing ----
- of refrigerant or less.
15 pounds
Small appliances are equipped with a
straight piece of tubing that can be
used to -----.
install a piercing type
access fitting
When installing an access fitting onto
a sealed system, the fitting should be
----- before proceeding with recovery
leak tested
It is generally recommended that
solderless piercing type valves only be
used on ----- or ----- tubing material.
copper
aluminum
Solderless piercing type valves tend
to ----- and should not be left on an
appliance as a ----- service fixture.
leak over time
permanent
After installing an access fitting, if
you find that the system pressure is
0 psig, do not -----
begin the recovery
process.
If the appliance is equipped with a defrost heater,
such as in a domestic frost-free refrigerator,
operating the defrost heater will (2)-----
help to vaporize any trapped liquid
refrigerant and will speed up the
recovery process.
If a strong odor is detected during
the recovery process, a ----- has
likely occurred.
compressor burn-out
When recovering refrigerant from a
system that experienced a
compressor burn-out, watch for -----
signs of contamination in
the oil.
After recovering refrigerant, if
nitrogen is used to flush debris out of
the system, the nitrogen may be -----.
legally vented.
Refrigerators built before 1950 may have
used (3) ----- as refrigerant and ----- be
recovered with current recovery devices.
Methyl formate, Methyl Chloride, or Sulfer Dioxide
should not
When filling a graduated charging cylinder with
a regulated refrigerant , the refrigerant vapor
that is ----- of the cylinder must be recovered.
vented off the top