Screw Compressor Central Chiller
Chapter 3: Installation
18
Making Process Water Connections
All Models
All central chilling stations have two chilled water connections per unit, and on water-cooled
models, one more set of water connections for condenser water:
The chilled water manifold allows one-point connections of Chilled Water piping. The Sch.
40 steel piping includes butterfly valves at each evaporator for flow balancing and circuit
isolation; optional pressure gauges can be installed.
To Process
The chilled water supply outlet should be piped to the cold side of the pump tank.
From Process
The chilled water return for water returning back to the chiller from the process to be cooled
and recirculated from the hot side of the pump tank.
Control Probe
This central chilling station is equipped with two control probes which sense temperatures.
One probe measures the temperature of the hot well and the other does the same for the cold
well of the reservoir. These temperatures are used by the PLC controller to sequence the
compressors, based on load.
