9
experienced.
•
Baffles may be necessary to deflect strong winds. They
must not restrict air flow into the unit.
CAUTION: Before lifting the unit, check that all casing
panels are securely fixed in place. Lift and set down the unit
with great care. Tilting and jarring can damage the unit and
impair unit operation.
If 30XAV units are hoisted with rigging, it is advisable to
protect coils against crushing while a unit is being moved.
Use struts or spreader bar to spread the slings above the unit.
Do not tilt a unit more than 15°.
WARNING: Never push or lever on any of the enclosure
panels of the unit. Only the base of the unit frame is designed
to withstand such stresses.
No force or effort must be applied to pressurised parts,
especially via pipes connected to the evaporator.
2.2.3 - Checks before system start-up
Before the start-up of the refrigeration system, the complete
installation, including the refrigeration system must be
verified against the installation drawings, dimensional
drawings, system piping and instrumentation diagrams and
the wiring diagrams.
Heat exchange fluid temperatures above the maximum
recommended can lead to an increase in the refrigerant
pressure and can cause a loss of refrigerant due to the relief
valve discharge.
For these checks national regulations must be followed. If
the national regulation does not specify any details, refer to
standard EN 378 as follows:
External visual installation checks:
•
Compare the complete installation with the refrigeration
system and power circuit diagrams.
•
Check that all components comply with the design
specifications.
•
Check that all protection documents and equipment
provided by the manufacturer (dimensional drawings,
P&ID, declarations, etc.) to comply with the regulations
are present.
•
Verify that the environmental safety and protection
devices and arrangements provided by the manufacturer
to comply with the regulations are in place.
•
Verify that all documents for pressure containers, certificates,
name plates, files, instruction manuals provided by the
manufacturer to comply with the regulations are present.
•
Verify the free passage of access and safety routes.
•
Check that ventilation in the plant room is adequate.
•
Check that refrigerant detectors are present.
•
Verify the instructions and directives to prevent the
venting removal of refrigerant gases that are harmful to
the environment.
•
Verify the installation of connections.
•
Verify the supports and fixing elements (materials,
routing and connection).
•
Verify the quality of welds and other joints.
•
Check the protection against mechanical damage.
•
Check the protection against heat.
•
Check the protection of moving parts.
•
Verify the accessibility for maintenance or repair and
to check the piping.
•
Verify the status of the valves.
•
Verify the quality of the thermal insulation and of the
vapour barriers.
2.3 - Actual start-up
Never be tempted to start the chiller without reading fully,
and understanding, the operating instructions and without
having carried out the following pre-start checks:
•
Check the chilled water circulation pumps, the air
handling equipment and any other device connected to
the evaporator.
•
Refer to the manufacturer instructions.
•
Refer to the electrical diagram delivered with the unit.
•
Ensure that there is no refrigerant leak.
•
Check the tightening of fixing clamps of all pipes.
•
Check the power supply at the main connection point
and the order of phases.
•
Check the correct operation of the heaters and check
that they are correctly energised.
WARNING: Commissioning and start-up of the chiller must
be supervised by a qualified refrigeration engineer.
•
Start-up and operating tests must be carried out with
a thermal load applied and water circulation in the
evaporator.
•
All set-point adjustments and control tests must be
carried out before the unit is started up.
•
Refer to the Service guide 30XAV.
Proceed with the unit commissioning.
Ensure that all safety devices are operational, especially
that the high pressure switches are functioning and that any
alarms have been acknowledged and corrected.
NOTE: If the Carrier instructions (power and water
connections and installation) are not observed, the Carrier
warranty becomes invalid.
Summary of Contents for AquaForce 30XAV 1050
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