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person who might be near the unit at that moment is moved to a secure location.
•
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 pressurized fluids.
2.8 PRECAUTIONS TO BE OBSERVED DURING MAINTENANCE OPERATIONS
Only authorised technicians may 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 the electronic card always use appropriate equipment (extractor, anti-static bracelet, etc.).
•
if a compressor, the condensation batteries or any other heavy part is to be replaced, make sure that the lifting
equipment matches the weight to be lifted.
•
if the unit has 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.
•
always use original spare parts bought directly from TRANE or from official dealers of the companies reported in the list
of recommended spare parts.
•
if the unit is to be moved after a year of being in the site or if it has to be dismantled contact TRANE.
IMPORTANT! No refrigerant high pressure safety valve is installed on RAUS / RAUX units.
The unit fail safe is assured by the cut-out of the electrical power supply to the coils of the compressors contactors.
The cut-out action is carried out by the electrical contact of the unit high pressure switch (regarding its position in the
refrigerant circuit of RAUX refer to the par INSTALLATION DIAGRAM AND PLACING OF THE LIQUID RECEIVER).
No Schrader valve is installed in the port the unit high pressure switch is plugged into.
This implies that following instruction must be observed:
DO NOT PULL OUT THE HIGH PRESSURE SWITCHES HP IF THE UNIT IS NOT COMPLETELY VOID OF
REFRIGERANT. FAILURE TO FOLLOW THIS INSTRUCTION COULD RESULT IN DEATH OR SERIOUS
INJURY
2.9 MANUAL ALARM RESET
If there is an alarm the unit must not be manually reset before having located and eliminated the cause of the fault.
Repeated manual resets may cause the warranty to be void.
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