Sterling Power Products 30F to 65F 3-3High Pressure Cutout, 3-4Low Pressure Cutout

3-3 High Pressure Cutout

The high pressure cutout is an electro-mechanical safety feature that opens the control circuit if the system condensing pressure exceeds a safe level. The chiller will automatically restart when the pressure drops back to an acceptable level.

Model	Cuts out if condensing pressure exceeds:
SMC050	275 psi (1,897 kPa)
SMC100	275 psi (1,897 kPa)
SMC150	400 psi (2,759 kPa)

IMPORTANT!

Call a refrigeration service technician to analyze

the problem if high pressure recurs.

3-4 Low Pressure Cutout

The low pressure cutout is an electro-mechanical safety feature that prevents compressor suction pressure from dropping below a preset point.

It is factory set to open the control circuit when pressure drops below a safe level. The chiller will automatically restart when the suction pressure reaches an acceptable level.

Model	Cuts out if suction pressure falls below:
SMC050	15 psi (103 kPa)
SMC100	15 psi (103 kPa)
SMC150	35 psi (241 kPa)

3-5 Remote Start/Stop Interlock

A contact is provided to allow interlocking of the SMC Series Chiller with process controls. To use this feature, remove the jumper between Terminals X1 and 1 on Terminal Block 1. Supply a switch or dry contact interlock connected in series between these two terminals. See Figure 15 and Figure 16 on pages 34 and 35 for more information.

SMC Series Chillers Page 19