Johnson Controls YEWS Series, Installation, Operation And Maintanance Instructions

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12 DECOMMISSIONING,DISMANTLING AND DISPOSAL
12.1 General description
Never release refrigerant to the atmosphere when
emptying the refrigerating circuits. Suitable
retrieval equipment must be used. If reclaimed
refrigerant cannot be reused. It must be
Enteringed to the manufacturer.
Never discard used compressor oil, as it contains
refrigerant in solution. Entering used oil to the
oil manufacturer.
Unless otherwise indicated, the operations described bel-
ow can be performed by any properly trained mainten-
ance technician.
Isolate all sources of electrical supply to the unit including
any control system supplies switched by the unit. Ensure
that all points of isolation are secured in the 'OFF'
position. The supply cables may then be disconnected and
removed. For connection points refer to Section 4.
Remove all refrigerant from each system of the unit into a
suitable container using a refrigerant reclaim or recovery
unit.This refrigenmt may then be re-used, if appropriate,
or Enteringed to the manufacturer for disposal. Under NO
circumstances should refrigerant be vented to atmosphere.
Drain the oil from each system into a suitable container
and dispose of according to local laws and regulations
governing the disposal of oily wastes. Any spill oil should
be mopped up and similarly disposed of.
Isolate the unit heat exchangers from the external water
systems and drain the heat exchanger section of the
systems. If no isolation valves are installed it may be
necessary to drain the complete system.
After draining, the water pipework can be disconnected
and removed.
Units can generally be removed in one piece after
disconnection as above. Any mounting bolts should be
removed and then the unit should be lifted from position
using the points provided and equipment of adequate
lifting capacity.
Reference should be made to Section 4 for unit
installation instructions, Section 9 for unit weights and
Section 3 for handling.
Units which cannot be removed in one piece after
disconnection as above must be dismantled in position.
Special care should be taken regarding the weight and
handling of each component.Where possible units should
be dismantled in the reverse order of installation.
Residual refrigerant oil and glycol or similar
solutions may remain in some parts of the
system. These should be mopped up and
disposed of as described above.
It is important to ensure that whilst components are being
removed the remaining parts are supported in a safe
manner.
Only use lifting equipment of a dequate capacity.
After removal from position the unit parts may be
disposed of according to local laws and regulations.
WARNING
WARNING
WARNING
WARNING
YEWS-E Water Cooling Screw Chiller/Heat Pump
71