86
Installation and Maintenance
Service Manual
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 labelled
for that refrigerant (i.e. special cylinders for the recovery of
refrigerant). Cylinders shall be complete with pressure-relief
valve and associated shut-off 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 equipment that 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 available and 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.
● General
That the installation of pipe-work shall be kept to a minimum.
That compliance with national gas regulations shall be
observed.
That mechanical connections made in accordance with
22.118 shall be accessible for maintenance purposes.
To Next Page
Loading...
