Danfoss KP 35 Low Current Pressure Switch Instruction Manual

1. Pengenalan

This manual provides essential information for the safe and effective installation, operation, and maintenance of the Danfoss KP 35 Low Current Pressure Switch. The KP 35 is designed for use in various applications including refrigeration, air conditioning, and general industrial systems, monitoring and controlling pressure within a specified range.

2. Maklumat Keselamatan

AMARAN: Improper installation, operation, or maintenance can result in serious injury or equipment damage. Always follow these safety guidelines:

• Ensure power supply is disconnected before installation or servicing.
• Pemasangan dan servis hendaklah dilakukan oleh kakitangan yang berkelayakan sahaja.
• Verify that the pressure switch specifications match the system requirements.
• Do not exceed the maximum rated pressure or temperature.
• Protect the switch from physical damage and environmental extremes.

3. Produk Lebihview

The Danfoss KP 35 pressure switch is a compact, robust control device featuring a single-pole double-throw (SPDT) contact system. It is designed for regulating, monitoring, and alarm systems in industrial applications. The switch is equipped with a pressure connection and electrical terminals for easy integration into control circuits.

Rajah 3.1: Depan view of the Danfoss KP 35 pressure switch, displaying the adjustable range and differential scales, along with the Danfoss logo and "INSTRUKART" branding.

Rajah 3.2: Sisi view of the Danfoss KP 35 pressure switch, highlighting the pressure connection port at the bottom and the electrical conduit entry on the side.

4. Spesifikasi

Figure 4.1: Danfoss KP 35 pressure switch shown alongside a ruler, providing a visual reference for its physical dimensions. Mounting screws and washers are also visible.

Figure 4.2: Technical drawing illustrating the dimensions of the Danfoss KP 35 pressure switch, including height, width, and depth, along with connection details.

5. Pemasangan

5.1 Pemasangan

1. Select a suitable location free from excessive vibration, moisture, and extreme temperatures.
2. Mount the switch using the provided mounting holes. Ensure it is securely fastened.
3. The switch can be mounted in any position, but vertical mounting with the pressure connection downwards is generally recommended to prevent accumulation of liquids in the pressure connection.

5.2 Sambungan Tekanan

1. Connect the pressure switch to the system's pressure line using the 1/2 inch connection.
2. Use appropriate sealing material (e.g., PTFE tape) to ensure a leak-free connection.
3. Avoid overtightening the connection to prevent damage to the switch or piping.

5.3 Pendawaian Elektrik

PERHATIAN: Disconnect all power before performing electrical wiring.

1. Remove the cover of the switch to access the electrical terminals.
2. Connect the electrical wires according to the system's wiring diagram and local electrical codes. The KP 35 features SPDT contacts.
3. Pastikan semua sambungan selamat dan terlindung dengan betul.
4. Replace the cover securely after wiring.

Gambar 5.1: Dalaman view of the Danfoss KP 35 pressure switch with the cover removed, revealing the electrical terminals and contact mechanism. This view is crucial for wiring connections.

6. Persediaan dan Pelarasan

The KP 35 pressure switch allows for independent adjustment of the cut-in pressure (range) and the differential pressure.

1. Adjusting the Range (Cut-in Pressure): Use the larger adjustment screw or knob (typically marked "RANGE") to set the desired cut-in pressure. This is the pressure at which the switch will activate or deactivate.
2. Adjusting the Differential: Use the smaller adjustment screw or knob (typically marked "DIFF") to set the differential pressure. This is the difference between the cut-in and cut-out pressures. For example, if the range is set to 5 bar and the differential to 1 bar, the switch will cut in at 5 bar and cut out at 4 bar (for a decreasing pressure application).
3. Refer to the scales on the front of the switch for precise settings.
4. After adjustment, verify the settings by observing the system's pressure and the switch's operation.

7. Arahan Operasi

Once installed and adjusted, the Danfoss KP 35 pressure switch operates automatically based on the system pressure. When the pressure reaches the set cut-in point, the SPDT contacts will switch position. When the pressure changes by the set differential, the contacts will switch back.

• Monitor system pressure to ensure it remains within the safe operating limits of both the switch and the overall system.
• Observe the electrical load connected to the switch to ensure it does not exceed the switch's rated capacity.

8. Penyelenggaraan

The Danfoss KP 35 pressure switch is designed for long-term, reliable operation with minimal maintenance. However, periodic checks are recommended:

• Pemeriksaan Visual: Regularly inspect the switch for any signs of physical damage, corrosion, or loose connections.
• Pemeriksaan Kebocoran: Periodically check the pressure connection for any leaks.
• Ujian Fungsian: If possible and safe, periodically test the switch's operation by simulating pressure changes to ensure it activates and deactivates at the set points.
• Pembersihan: Keep the exterior of the switch clean and free from dust and debris. Do not use harsh chemicals.

9. Penyelesaian masalah

If the pressure switch is not functioning as expected, consider the following common issues:

10. Waranti dan Sokongan

For specific warranty information and technical support, please refer to the official Danfoss website or contact your authorized Danfoss distributor. Keep your purchase receipt for warranty claims.

Official Danfoss Webtapak: www.danfoss.com