www.DaikinApplied.com 93 IM 1287-6 • REBEL APPLIED ROOFTOP
REFRIGERANTS, ensure that there are labels
on the equipment stating the equipment
contains FLAMMABLE REFRIGERANT.
Recovery
• When removing refrigerant from a system, either for
servicing or decommissioning, the refrigerant must be
removed safely.
• When transferring refrigerant into cylinders, ensure
that only appropriate refrigerant recovery cylinders are
employed. Ensure that the correct number of cylinders for
holding the total system charge is available. All cylinders
to be used are designated for the recovered refrigerant
and labeled for that refrigerant (i. e. special cylinders for
the recovery of refrigerant). Cylinders shall be complete
with pressure-relief valve and associated shut-o valves
in good working order. Empty recovery cylinders are
evacuated and, if possible, cooled before recovery
occurs.
• The recovery equipment shall be in good working order
with a set of instructions concerning the equipmenthat
is at hand and shall be suitable for the recovery of all
appropriate refrigerants including, when applicable,
FLAMMABLE REFRIGERANTS. In addition, a set of
calibrated weighing scales shall be availableand in good
working order. Hoses shall be complete with leak-free
disconnect couplings and in good condition. Before using
the recovery machine, check that it is in satisfactory
working order, has been properly maintained and that any
associated electrical components are sealed to prevent
ignition in the event of a refrigerant release. Consult
manufacturer if in doubt.
• The recovered refrigerant shall be returned to the
refrigerant supplier in the correct recovery cylinder,
and the relevant waste transfer note arranged. Do not
mix refrigerants in recovery units and especially not in
cylinders.
If compressors or compressor oils are
to be removed, ensure that they have
been evacuated to an acceptable level
to make certain that FLAMMABLE
REFRIGERANT does not remain within
the lubricant. The evacuation process
shall be carried out prior to returning
the compressor to the suppliers. Only
electric heating to the compressor body
shall be employed to accelerate this
process. When oil is drained from a
system, it shall be carried out safely.
Lubrication
R-32 should only be used with manufacturer-approved
oil, such as DAPHNE FW68DE. The HFC refrigerant
components in R-32 will not be compatible with mineral
oil or alkylbenzene lubricants. R-32 systems will be
charged with the OEM recommended lubricant, ready for
use with R-32.
Leak Detection
NEVER use the following when attempting to detect
R-32 refrigerant leaks:
• A halide torch (or any other detector using a naked ame)
• Substances containing chlorine
Pressure Testing and Refrigerant
Evacuation
• Make sure that air or any matter other than R-32
refrigerant does not enter the refrigeration cycle.
• If refrigerant gas leaks occur in an enclosed area,
ventilate the space as soon as possible.
• R-32 should always be recovered and never released
directly into the environment.
• Only use tools meant for use on R-32 refrigerant (such
as a gauge manifold, charging hose, or vacuum pump
adapter).
Commissioning
• Ensure proper connection of all piping and carry out a
leak test before charging with refrigerant.
• Check safety equipment before putting into service.
Decommissioning
ALWAYS remove refrigerant charge before decommissioning
the unit.
• Ensure sucient ventilation at the equipment location.
• Be aware that malfunction of the equipment may be
caused by refrigerant loss and a refrigerant leak is
possible.
• Discharge capacitors in a way that won’t cause any
spark.
• R-32 should always be recovered and never released
directly into the environment. Take care that the drained
refrigerant will not cause any danger. In doubt, one
person should guard the outlet. Take special care that
drained refrigerant will not oat back into the building.
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