Trane CGA Series, Установка, эксплуатация и обслуживание, Страница: 6 / 24

• wear a protective helmet before entering inside the unit
• before opening a machine panel make sure that it is firmly connected by means of a hinge
• do not touch the air condensation coils without having first put on protective gloves
• do not remove the protections to the moving parts while the unit is running
• before restarting the unit make sure that the moving part protections are in the correct position
Prevention against residual electrical risks
• connect the unit to the mains in accordance with the provisions of this manual
• carry out all maintenance operations regularly
• before opening the control panel disconnect the unit from the mains by means of the external knife switch
• check that the unit has been earthen correctly before starting it up
• control all the electrical connections, the connection cables paying particular attention to the state of isolation; replace
the cables which are clearly worn or damaged
• carry out periodic checks of the wiring inside the panel
• do not use cables with an inappropriate section or flying connections not even for a limited period or in an emergency
Prevention against residual risks of a different nature
• Residual risks due to pressure are mainly coming from non-functioning of the safety devices. To prevent them it is
necessary to follow checks and replacements as following (§12.1 and 13)
• To protect from safety devices exhaust it is not allowed to remove the protections while the unit is in operation and to
approach the unit without wearing the right protections. In case of accidental contact with refrigerant due to the safety
valves exhaust it is necessary to follow the above (§2.5)
• carry out the plant connections to the unit by following the indications reported on the following manual and on the
panels of the unit itself
• if a part is disassembled, make sure that it is correctly reassembled before restarting the unit
• do not touch the discharge line of the compressor, the compressor itself or any other tube or component which is inside
the machine without putting on protective gloves
• keep a fire extinguisher which is able to put out fires on electrical equipment near the machine
• on units installed inside, connect the refrigerant circuit shut off valve to a network of tubes which are able to lead the
possible spillage of refrigerating fluid outside
• eliminate any fluid loss inside or outside the unit
• collect the discharge liquid and clean up any possible oil leakage
• periodically clean the compressor casing of the accumulated dirt deposits
• do not keep inflammable liquids near the unit
• do not dispose of the refrigerant fluid and the lubricating oil in the environment
• welding should only be carried out on empty tubes; do not approach the tubes containing refrigerant fluid with flames or
other sources of heat
• do not bend or strike tubes containing pressurised fluids
Precautions to be observed during maintenance operations
Authorised technicians may only carry out maintenance operations. Before carrying out any maintenance the following
must be performed:
• isolate the unit from the mains electricity by using the external knife switch
• place a notice on the external knife switch which says
“
do not use -
maintenance in progress”
• make sure that any possible on-off commands are disabled
• use appropriate safety equipment (helmet, isolating gloves, protective glasses, safety shoes etc.)
If measurements or controls must be carried out which require the machine to be running the following observations must
be followed:
• operate with the electrical panel open for as short a time as is possible
• close the electrical panel as soon as the individual measurement or control has been carried out
• for units which are located outside, do not carry out interventions in dangerous atmospheric conditions such as rain,
snow, fog etc.
The following precautions should also be taken at all times:
• never dispose of fluids contained in the refrigerant circuit into the environment
• when replacing an EPROM or electronic card always use appropriate equipment (extractor, anti-static bracelet, etc.)
• if a compressor, the evaporator, the condensation coils or any other heavy part is to be replaced, make sure that the
lifting equipment matches the weight to be lifted
• in the air cooled units with an independent compressor compartment, do not open the ventilator compartment without
having first isolated the machine using the knife switch on the side of the panel and only after having placed a sign which
says “do not use - maintenance in progress”
• if modifications must be carried out to the cooling, hydraulic or electrical circuit of the unit, as well as to its command
logic, contact Trane
• if particularly complicated assembly or disassembly operations are to be carried out contact Trane