Carrier PIC 5+, Installation, Operation And Maintenance Instructions

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CAUTION: When flushing the water systems, isolate the chiller from the water circuits to prevent damage to the
heat exchanger tubes.
1 - Offset pipe flanges to permit removal of waterbox cover for maintenance and to provide clearance for pipe
cleaning. No flanges are necessary with marine waterbox option; however, water piping should not cross in front
of the waterbox or compressor because service access will be blocked.
2 - Provide openings in water piping for required pressure gages and thermometers. For thorough mixing and
temperature stabilization, wells in the leaving water pipe should extend inside pipe at least 2 in. (50 mm).
3. Install air vents at all high points in piping to remove air and prevent water hammer.
4. Field-installed piping must be arranged and supported to avoid stress on the equipment and transmission of
vibration from the equipment. Piping must be installed to prevent interference with routine access for the reading,
adjusting, and servicing of the equipment. Provisions should be made for adjusting the piping in each plane for
periodic and major servicing of the equipment.
5. Water flow direction must be as specified in Fig. 23.
NOTE: Entering water is always the lower of the 2 nozzles. Leaving water is always the upper nozzle for evaporator
or condenser for two and three pass arrangements.
1 : Air vent
2 : Pressure gages
3 : Leaving chilled water
4 : Entering chilled water
5 : Isolation valves
6 : Leaving condenser water
7 : Entering condenser water
Note:
It is also strongly recommended to install 1-inch diameter connection points with valves on each
customer side water pipe. These connection points are used to connect an heating device (water heatpump)
on closed loop to warm the water inside the cooler or condenser in case of refrigerant retrieving.
Fig 23
– Typical nozzle piping (not supplied by Carrier)
6. Install waterbox vent and drain piping in accordance with individual job data. Consult certified drawings for
connection size.
7. Install waterbox drain plugs in the unused waterbox and vent openings..
8. Isolation valves are recommended on the cooler and condenser piping to each chiller for service. The isolation
valves should allow for piping between the valves and chiller to be removed without draining the system fluid.
9. Apply appropriate torque on the retaining bolts in a crisscross pattern for the water box covers before insulating
the water box cover. The gasket can relax during transportation and storage and the water box cover requires
retightening of the bolts during installation.