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.)

Model

 

Water Side Pressure Drop

 

Condenser (each)

Evaporator (each)

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.

SCW Series Central Chilling Stations

Page 25 of 77

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Image 25
Sterling SCW Series installation manual Installing the Remote Air-Cooled Condenser, Condenser Water Out