Sterling Saw A0544325 Benutzerhandbuch

Process Water Bypass
All SMC chillers have an internal bypass device (patent pending). If the process flow becomes
blocked during chiller operation, this component allows water to flow through the chiller. This
protects the chiller from freeze-up, excessive pressures, and pump damage, and allows other
safety features to remain effective.

SMC chillers use the surrounding air to cool the condenser.

;

  Condenser air entering the SMC unit should be at least 65

°F (18°C). Operation with air

below 65

°F (18°C) can cause the low pressure cutout to shut down the chiller due to the low

refrigerant pressure.

;

  Install the chiller in an area where there is free passage of air for condensing.

;

  Provide 18” (46 cm) or more clearance for the chiller’s air intake.

;

  Make provisions to exhaust the heated air discharged from the chiller.

;

  Do not put the SMC unit where steam, hot air or fume exhausts will be drawn into the

condenser.

;

  Air-cooled condensers must be cleaned frequently. Neglect reduces capacity, increases

operating costs, and leads to possible chiller failure. See Chapter 7 on Page 31 for cleaning
instructions.

;

  Normal condensing pressure with 95

°F (35°C) air is approximately 180 psi (1,241 kPa) for

the SMC050A and SMC100A; 275 psi (1,897 kPa) for the SMC150A.

Operation

65°F (18°C)

100°F (38°C)

Storage

40°F (4°C)

120°F (49°C)

During startup and when additional solution is required, see Figure 5 on Page 17 for the
recommended ethylene glycol/water solution. This chart shows the proportions needed to
provide freeze protection to 20

°F/°C below the desired process setpoint.

;

  Add a pre-mixed solution to provide freeze protection to a temperature 20

°F/°C below the

normal operating temperature of the chiller.

;

  Use industrial quality (not automotive) ethylene glycol.