Sterlco S Series Central Chilling Stations - Manual (Page 25)

SCW Series Central Chilling Stations Page 25 of 77
Two connections are made to each SCW Series unit:
Condenser Water In
The city or tower water supply inlet is located at the side or rear of
the chiller.
• Water pressure ≥ 25 psi (≥ 172.4 kPa/≥ 1.72 bars)
• Water temperature ≤ 85°F (≤ 29ºC)
Condenser Water Out
The return outlet, located at the chiller side or rear is connected to
a cooling tower inlet, a sewer or other approved discharge receiver.
• A water regulating valve is an optional feature in the
condenser water out line.
• Adjust the butterfly valve for the pressure drop that
corresponds to the model number of the chiller. Pressure drop
is equal to supply pressure minus return pressure. (If a water
regulating valve has been supplied, adjustment is not required.)
Water Side Pressure Drop
Condenser (each) Evaporator (each)
Model
Number
Flow (gpm) PD (psi) Flow (gpm) PD (psi)
SCWW/R60 91 4.0 72 5.3
SCWW/R75 102 4.7 90 4.5
SCWW/R90 117 4.4 107 5.6
SCWW/R100 150 5.5 123 3.9
SCWWR115 166 4.3 140 3.0
SCWW/R145 196 4.1 175 4.8
SCWW/R165 219 4.1 200 4.6
SCWW/R195 278 4.7 232 6.0
3-10 Installing the Remote Air-Cooled Condenser
SCW Series models use the surrounding air to cool the remote
condenser. All models have variable speed fans and low ambient
controls to allow proper operation down to -20°F (-29ºC) outdoor
air temperature.
Install the remote air cooled condenser where there is:
• Greater than or equal to -20°F (-29ºC) air temperature.
• Free passage of air for condensing.
• Adequate structural support.
• Protection from strong winds and drifting snow.
• Provisions for removal of heated air from the area.