Alco PS1-W5U high pressure switch, 6-31 bar, automatic reset

The Alco Controls PS1-W5U (order no. 4713439) is an adjustable high pressure switch for refrigeration and air conditioning systems. It monitors the high-pressure circuit and switches off the compressor or the system when the set pressure is reached. It resets automatically as soon as the pressure falls below the switch-on pressure again.

The PS1 series offers adjustable pressure setpoints, robust contact technology with high switching capacity and is suitable for a wide range of refrigerants and system configurations.

Technical data

• Manufacturer / type: Alco Controls PS1-W5U
• Article number: 4713439
• Function: High pressure switch (High Pressure Control)
• Design: adjustable pressure regulator with automatic reset (Auto Reset)
• Adjustment range: 6-31 bar
• Differential pressure: 2-15 bar
• Lowest adjustable pressure: 3 bar
• Mill setting: approx. 16-20 bar
• Pressure connection: 6 mm connection (flared or soldered version, depending on version)

Properties

• Adjustable pressure setpoints: flexible use in different systems
• Automatic reset: the switch resets automatically as soon as the pressure is back within the permissible range
• Rattle-free contacts: bounce-free switching contacts for reliable signalling and reduced contact wear
• High switching capacity: for high starting currents (locked rotor, suitable for LRA up to 144 A)
• Standard SPDT: changeover contact (single pole double throw) with the same rated operating current for both contacts
• Pluggable blocking plate: incl. blocking plate and fastening screws to secure the setting

Conditions of use and approvals

• Medium/ambient temperature (TS): -50...+70 °C
• Protection class: IP44 (with flush wall installation of the control unit)
• Approvals / labelling: CE, UL, EAC

The Alco PS1-W5U high-pressure switch is suitable for use in commercial and industrial refrigeration and air conditioning systems where reliable high-pressure protection with automatic reset and high switching capacity is required. The adjustable pressure range and robust design make it versatile for use in new and existing systems.