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14 START-UP
14.1
PRELIMINARY CONTROLS
Before starting up the equipment it is very important to check that all the operations described in
the paragraph “CHECK LIST – MANDATORY OPERATION CONTROL BEFORE START UP”
have been carried out correctly.
Moreover check that all the mechanical and electric equipment has been tightened
perfectly. Particular attention should be paid to the main components (compressor,
exchangers, ventilators, electrical motors, and pump) if loose fastenings are found, tighten
them well before starting up the machine.
The oil heaters have to be inserted at least 8 hours before starting up. Ensure that the
compressors’ carter is hot. Open the compressor valve and the cooling circuit one, which may
have been shut for charging. Control all the machinery connected to the unit.
DANGER: The chilled water circuit may be under pressure. Bring down this pressure before
opening up the system to rinse out or fill up the water circuit. Failure to comply with this instruction
may cause accidental injury to maintenance personnel. If a cleaning solution is used in the chilled
water circuit, the chiller must be isolated from the water circuit to avoid all the damage risks of the
chiller and evaporator water pipes.
14.2
STARTING UP
Start up the unit by pressing the ON/OFF button. About 20 seconds pass from the moment in
which the start-up request of the unit is given to the moment in which the (first) compressor starts.
Three hundred and sixty seconds will pass from the last shut down to the next start-up of the
same compressor.
Check the rotation direction of the compressors. If it is not the right one, invert two supply phases.
Ensure that all the safety and control equipment is functioning correctly. Control the temperature
of the water coming out of the evaporator and regulate the control setting if necessary. Control the
oil level.
The oil type is POE.
14.3
WARM UP OF THE PLANT
In order to keep all the machine components in good condition and to optimise their use, during the
warm up it is necessary to bring the circuit to the right temperature before releasing cooling or
heating energy to the utilities.
The following steps must be followed for this to be carried out:
*
start up the machine
*
wait for the water temperature to reach the running temperature
*
start up the consumers
Follow the above mentioned procedure every time the plant is stopped long enough for the water
temperature contained in it to vary considerably.
14.4
CONTROL OF THE OIL CHARGE
All the compressors mounted on Trane CCUF units are factory charged with oil whose chemical
characteristic of stability are very good, so it is not necessary to change frequently the lubricant oil.
The scroll compressors are equipped with an oil sight glass from which you can control the level.
In tandem or trio performances, pay particular attention to oil level. Not perfectly leveled sight
glasses between compressors in parallel, but falling in the upper and lower limits, are considered
normal.
In case of burns for the electrical motor or fault of the compressor, it is necessary to make a test to
check the acidity of the lubricant oil and, eventually, clean the circuit to reduce the acidity to
correct values, mounting for instance an anti-acid filter and changing the oil in the circuit.
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