Sinclair SDV 6 Service Manual page 9

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 are 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 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.
Warning: disconnect the appliance from its power source during service and when replacing parts.
These units are partial unit air conditioners, complying with partial unit requirements of this International Standard,
and must only be connected to other units that have been confirmed as complying to corresponding partial unit
requirements of this International Standard.
2.2 Qualification requirements for maintenance personnel
The following information indicates a hazard with a high level of risk which, if not avoided, will result
in death or serious injury.
These instructions are exclusively intended for qualified contractors and authorised installers
Work on the refrigerant circuit with flammable refrigerant in safety group A2L may only be carried out by authorised
heating contractors. These heating contractors must be trained in accordance with EN 378 Part 4 or IEC 60335-2-40,
Section HH. The certificate of competence from an industry accredited body.
Brazing/soldering work on the refrigerant circuit may only be carried out by contractors certified in accordance with ISO
13585 and AD 2000, Datasheet HP 100R. And only by contractors qualified and certified for the processes to be carried out.
The work must fall within the range of applications purchased and be carried out in accordance with the prescribed
procedures. Soldering/brazing work on accumulator connections requires certification of personnel and processes by a
notified body according to the Pressure Equipment Directive (2014/68/EU).
Work on electrical equipment may only be carried out by a qualified electrician.
Before initial commissioning, all safety relevant points must be checked by the particular certified heating contractors. The
system must be commissioned by the system installer or a qualified person authorised by the installer.
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