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SSC Series Central Chilling Stations Page 31 of 86
4-11 Control Nipple
All SSC Series chilling station evaporators have two control
nipples. The flow switch, freezestat, and flush port are located in
the control nipple. Optional pressure gages can be mounted in the
control nipples to aid in achieving proper flow through the
evaporator and balancing flows.
Coupling mounts for customer-installed pressure gauges are
included on both control nipples. Pressure drop between
evaporator entering water pressure and evaporator leaving water
pressure can be converted to gallons per minute using the pressure
drop charts provided.
4-12 Control Probe
Two control probes 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.
4-13 Chilled Water Manifold
The chilled water manifold allows one-point connections of TO
PROCESS piping. The Sch. 40 steel piping includes butterfly
valves at each evaporator for flow balancing and circuit isolation;
optional pressure gauges can be installed.
4-14 Condenser Water Manifold
The condenser water manifold allows one-point connection of TO
TOWER (drain) and FROM TOWER (city water) piping. Sch. 40
steel include butterfly valves for each condenser. Drain points are
at the bottom of the header.