19XR (PIC II) Hermetic Centrifugal Liquid Chillers 50 Hz - Carrier

4 - BEFORE INITIAL START-UP
4.1 - Necessary checks
4.1.1 - Job Data Required
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.
During the installation test national regulations must be
followed. If no national regulation exists, paragraph 9-5 of
standard EN 378-2 can be used as a guide.
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 safety documents and equipments that are
required by current European standards are present.
Verify that all safety and environmental protection
devices and arrangements are in place and comply with
the current European standard.
Verify that all document for pressure containers,
certificates, name plates, files, instruction manuals that are
required documents required by the current European
standards 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
deliberate 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.
4.1.2 - Equipment Required
mechanic’s tools (refrigeration)
digital volt-ohmmeter (DVM)
clamp-on ammeter
electronic leak detector
absolute pressure manometer or wet-bulb vacuum
indicator
500-V insulation tester (megohmmeter) for compressor
motors with nameplate voltage of 600 V or less, or a 5000-V
insulation tester for compressor motor rated above 600 V.
4.1.3 - Using the Optional Storage Tank and Pumpout
System
Refer to Pumpout and Refrigerant Transfer Procedures section,
for: pumpout system preparation, refrigerant transfer, and
chiller evacuation.
4.1.4 - Remove Shipping Packaging
Remove any packaging material from the control centre,
control box, guide vane actuator, motor cooling and oil reclaim
solenoids, motor and bearing temperature sensor covers, and
the factory-mounted starter.
4.1.5 - Open Oil Circuit Valves
Check that the oil filter isolation valves (Fig. 4) are open by
removing the valve cap and checking the valve stem.
4.1.6 - Tighten All Gasketed Joints and Guide Vane Shaft
Packing (torque depends on screw diameter)
Gaskets and packing normally relax by the time the chiller
arrives at the jobsite. Tighten all gasketed joints and the guide
vane shaft packing to ensure a leak tight chiller.
4.1.7 - Inspect Water Piping
Refer to piping diagrams provided in the certified drawings, and
the piping instructions in the 19XR Installation Instructions
manual. Inspect the piping to the cooler and condenser. Be sure
that flow directions are correct and that all piping specifications
have been met.
Do not introduce any significant static or dynamic pressure
into the heat exchange circuit (with regard to the design
operating pressures).
Before any start-up verify that the heat exchange fluid is
compatible with the materials and the water circuit coating.
In case additives or other fluids than those recommended by
Carrier s.a are used, ensure that the fluids are not considered as
a gas, and that they belong to class 2, as defined in directive
97/23/EC.
Carrier s.a. recommendations on heat exchange fluids:
1. No NH4+ ammonium ions in the water, they are very
detrimental for copper. This is one of the most important
factors for the operating life of copper piping. A content
of several tenths of mg/l will badly corrode the copper
over time.
2. Cl- Chloride ions are detrimental for copper with a risk of
perforations by corrosion by puncture. If possible keep
below 10 mg/l.
2- 3. SO sulphate ions can cause perforating corrosion, if
4
their content is above 30 mg/l.
4. No fluoride ions (2.8 K. Values between 10 and 25
can be recommended. This will facilitate scale deposit that
can limit corrosion of copper. TH values that are too high
can cause piping blockage over time. A total alkalimetric
titre (TAC) below 100 is desirable.
39