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4 Supplemental Installation Information for APC Chillers
Typical Piping — Redundant Chillers
Note
Components inside dashed lines are included with the chillers and CRACs. All other
items (valves, piping, etc.) are customer-supplied.
Storage tank — optional*
Expansion tank****
Isolation valves
Heat exchanger
Flex connections
Pressure gauges/petcocks
Check valves
Air vent connection port
Chilled water temperature sensor**
Dual pump
Strainer/blow-down valve
Electric heater
Pressure reducing/fill valve
Balance valve/drain plug
Air separator and vent***
Flow switch
* To provide the coldest possible water to the load, install the optional storage
tank on the leaving side of the chiller
** Chilled water temperature sensor should be wired to both chillers.
*** Install at the highest point in the system.
**** When applied in redundant chillers, disconnect the expansion tank and install
a single expansion tank in the common header.
CHILLER 1
CHILLER 2
CRACs