Samsung MOS-P1050 Differential Pressure Switch Installation Manual

Introduction

This installation guide explains how to install a differential pressure switch onto the ventilation system. Please read this manual thoroughly before installing the product.

Thank you for purchasing this Samsung product.

Before operating this unit, please read this Installation manual carefully and retain it for future reference.

Safety Information

This section provides important safety precautions to prevent personal injury or property damage during installation and operation.

General Safety Precautions

• WARNING: Hazards or unsafe practices that may result in severe personal injury or death.
• CAUTION: Hazards or unsafe practices that may result in minor personal injury or property damage.

Installation Safety

• Must follow directions.
• Do NOT attempt to disassemble the unit.
• Make sure the machine is grounded to prevent electric shock.
• Unplug the power plug from the wall socket before any work.
• WARNING: Contact a service center for installation. Failure to do so may result in product malfunction, water leakage, electric shock, and fire.
• You must use wires that meet specifications for installation. Failure to do so may result in fire or damage to the differential pressure switch.
• All electrical works should comply with local regulations and be carried out by a qualified technician. Installation by an unqualified technician may result in product malfunction, electric shock, and fire.
• Check whether the installation work is performed in accordance with the installation instructions. Incorrect installation may result in electric shock or fire.

Installation Precautions

• CAUTION: When connecting a wire, do not tighten it too much. Failure to do so may result in breakage of the wire.
• Make sure the differential pressure switch installation does not cause interference with other electrical appliances, particularly in sensitive environments like hospitals.
• Do not install the product in an area where combustible gas leaks or possible gas leakage is expected. Failure to do so may result in abnormal operation or wire breakage.
• Do not install the product in conditions where it is exposed to oil, steam, sulfuric acid gas, etc., as this may result in component damage or product malfunction.
• Do not install the product in a place where acid or alkali liquid or special sprays are used. Failure to do so may result in electric shock or abnormal operation.

Operation Safety

• WARNING: Do not remodel or repair the differential pressure switch yourself. Failure to do so may result in product malfunction, electric shock, and fire. Contact a service center for repair.
• When disposing of a differential pressure switch, contact a service center.
• Do not move or reinstall an installed differential pressure switch yourself. Failure to do so may result in electric shock or fire.

Installing the Differential Pressure Switch

Product and Components

The following components are included with the differential pressure switch:

Component Description

The differential pressure switch unit has the following features:

• Dimensions: Approximately 65.0mm in diameter, 57.5mm height. Rated IP54.
• Connection Sockets:
  • High pressure tube connection socket (P1)
  • Low pressure tube connection socket (P2)
• Electrical Connections: Pin-terminals labeled No. 1, No. 2, and No. 3.
• Pressure Adjustment: Features a "Pressure adjustment dial".
• Cable Entry: Equipped with a "Screw type cable connection part" and a "Cover".

Installing the differential pressure switch onto the ERV

1. Connect Tubes: Connect the PVC tubes to the two sockets on the side of the differential pressure switch. Connect the plastic tubes to the opposite side as shown in the figure.
   • Connect the low pressure side PVC tube to the socket P2 (upper socket).
   • Connect the high pressure side PVC tube to the socket P1 (lower socket).
   • Cut the PVC tube to fit the size required for the product.

   Diagram Description: Shows the differential pressure switch with two sockets, P1 and P2. A "Low pressure tube (P2)" is connected to the upper socket, and a "High pressure tube (P1)" is connected to the lower socket.

2. Mount Switch to ERV: Untighten the screws on the ERV, as marked in the figure, and then assemble the differential pressure switch using screws (PH, M4, and L10).

   Diagram Description: Shows the ERV unit with designated "Fixing position of the differential pressure switch" and "Assembly position of the low pressure tube". The screws are indicated to be covered with insulation at specific cutting positions marked with '+' symbols.

   Applicable Models: AN026**, AN035**, AN050**, AN080**, AN100**.

3. Assemble Low Pressure Tube: Disassemble the circular cover next to the electrical control part of the ERV. Assemble the low pressure plastic tube connected to the differential pressure switch socket P2. Then, fix the low pressure PVC tube to the product using the holder wire as shown in the figure.

   Diagram Description: Illustrates disassembling a cover and connecting a plastic tube to a socket. An arrow indicates the "plastic tube direction". Another diagram shows a holder wire being used to secure the plastic tube to a component, with "Screw (PH, M3, L10)" used for attachment.

   Ensure the direction of the plastic tube matches the airflow direction as indicated by the arrow in the figure.

   Applicable Models: AN026**, AN035**, AN050**, AN080**, AN100**.

   CAUTION: Be careful not to twist or press the PVC tube. Failure to do so may cause errors in pressure measurement, leading to product malfunction.

   If the direction of the plastic tube is not identical with the air flow direction, errors may occur in pressure measurement, leading to product malfunction.

4. Assemble High Pressure Tube to OA Duct: Assemble the high pressure plastic tube (P1) to the OA duct installed on site, and then fix the high pressure PVC tube using the holder wire.
   • Assemble the plastic tube to a side of the OA duct.
   • Assemble the plastic tube so that its direction is identical with the air flow direction in the OA duct.
   • Assemble the plastic tube at a position which is 300 to 500 mm away from the product.
   • Assemble the holder wire to the inspection cover assembly screw on the top of the product, and then fix the PVC tube.
   • Assemble the plastic tube to the external OA duct, and then fix the PVC tube using the holder wire.

   Diagram Description: Shows the connection of a plastic tube to an external OA duct, with an arrow indicating the "plastic tube direction". Another diagram shows the tube being secured with a holder wire. A separate diagram illustrates hole drilling on the duct with dimensions (8.0mm, Ø2.5, Ø75) for assembly.

   NOTE: To assemble the plastic tube to the OA duct, it is required to drill holes on the duct. For the hole sizes, refer to the figure.

   Applicable Models: AN035**, AN050**, AN080**, AN100**.

   CAUTION: In any case, be careful not to twist or press the PVC tube. Failure to do so may cause errors in pressure measurement, leading to product malfunction.

   If the direction of the plastic tube is not identical with the air flow direction, errors may occur in pressure measurement, leading to product malfunction.

   If the plastic tube is assembled below the OA duct, the plastic tube can be blocked by dirt or dust. Be careful not to assemble the plastic tube below the OA duct.

Connecting the connecting wires between the differential pressure switch and the ERV PBA

1. Untighten the screw (1 EA) of the differential pressure switch, disassemble the cover, and then pass the cable through the screw type cable connection part.

   Diagram Description: Shows the differential pressure switch cover being removed and a cable being passed through a connection port.

2. Apply a crimp type ring connector to each connecting wire located at the body side of the differential pressure switch, and then connect a pin-terminal connector, as shown in the figure.

   The cable and the crimp type ring connector do not come with the product and must be purchased on site.

   Diagram Description: Shows wires being fitted with crimp connectors and then connected to pin-terminal connectors.

3. Connect the connecting wires to the pin-terminals No. 2 and No. 3 located on both sides to the differential pressure switch dial, and then connect the opposite ends of the connecting wires to the HOOD terminals on the ERV PBA.

   Diagram Description: Shows a schematic of the ERV PBA with terminals labeled, and the connection of wires from the differential pressure switch to these terminals.

4. Rotate the screw type connection part clockwise to seal the opening appropriately in accordance with the thickness of the connecting wires.

   Diagram Description: Shows the screw type connection part being rotated to secure the cable.

   CAUTION: Be sure to switch off the power supply before installation. (Failure to do so may cause electrical problems, leading to abnormal operation of the product.)

   The wiring must be installed in compliance with electrical wiring regulations.

   If the diameter of the connecting wire is less than 5mm, the sealing of the screw type cable connection part may not be complete.

Setting using the differential pressure switch

1. Rotate the dial located at the center of the differential pressure switch until the number pointed by the yellow arrow becomes equal to the differential pressure setting value of the product.

   NOTE: When rotating the dial to set the differential pressure, be sure to rotate it in the direction that the number increases from the minimum value to the setting value. If you rotate the dial in the direction that the number decreases to the setting value, errors may occur in differential pressure measurement.

   WARNING: Be sure to set the differential pressure while the product is turned off. If it is not turned off, an electric shock may occur due to your contact with a peripheral wire.

   Differential Pressure Setting Values by Model

   Model	Differential pressure setting
   AN026JSKLKN/EU	220
   AN035JSKLKN/EU	200
   AN050JSKLKN/EU	250
   AN080JSKLKN/EU	280
   AN100JSKLKN/EU	310

2. Close the cover of the differential pressure switch, and then tighten the screw.
3. Set SEG17 of the installation option 1 (02 mode) of the product to 1. (The ANxxxJSKLKN/EU models ship with being set to the factory default 1.)