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Nortek VM Operations Manual

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NORTEK VM Operations
Installation Manual Bottom Penetration - Single Bottom
PRODUCT:
Nortek VM Operations
-
333 kHz Sensor Head with Single Bottom Penetration Assembly
Owner Company Name / Logo
Originator/Contractor/Supplier Company Name
Nortek Netherlands B.V.
www.nortekgroup.com
Project No.:
Contract / P.O. No.:
Originator/Contractor/Supplier Document
Number
2043-NSO-Z-MB-001

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  • Page 1 NORTEK VM Operations Installation Manual Bottom Penetration - Single Bottom www.nortekgroup.com PRODUCT: Nortek VM Operations 333 kHz Sensor Head with Single Bottom Penetration Assembly Owner Company Name / Logo Project No.: Contract / P.O. No.: Originator/Contractor/Supplier Company Name Originator/Contractor/Supplier Document Number Nortek Netherlands B.V.
  • Page 2 Document History 23.03.2023 Various product updates 10.02.2023 Update with new PU dimensions 19.01.2023 Update to Nortek NL and Sign VM Ops 30.10.2019 Issued for DnV-GL Approval ØDA 26.04.2019 Issued for DnV-GL Pre-Approval ØDA 15.10.2018 Issued for Approval 27.08.2018 Issued for Review Rev.

  • Page 3: Table Of Contents

    Table of Contents Table of Contents ..........................3 Technical specifications ......................4 DNV Type Approval Bottom Penetration Unit ................4 Installation Guide ........................5 Placement of Bottom Penetration & general instructions ........... 11 NSO SB Flange welding ......................13 Assembling ..........................14 Subassembly ........................

  • Page 4: Technical Specifications

    1. Technical specifications The VM Operations package with a 333 kHz sensor head is an Acoustic Doppler Current Profiler [ADCP] for use on operational offshore vessels. The modern, directly applicable software allows easy operation. It comes with a junction-box and a processing unit to display data in real time.

  • Page 5: Installation Guide

    Figure 1. N2043-053 NSO SB Assembly Figure 2. N2043-065 NSO Bell Housing Assembly (JB1, 100 – 240V AC) Figure 3. N2043-040 NSO Pipe Assembly for SB Figure 4. N2043-053 NSO Maintenance space for SB Figure 5. 4430-6010.01 Junction Box VM Operations www.nortekgroup.com...
  • Page 6 Figure 1. N2043-053 NSO SB Assembly (NSO:Nortek Signature Operations) www.nortekgroup.com...
  • Page 7 Figure 2. N2043-065 NSO Bell Housing Assembly (100 – 240V AC) www.nortekgroup.com...
  • Page 8 Figure 3. N2043-040 NSO Pipe Assembly for SB www.nortekgroup.com...
  • Page 9 Figure 4. N2043-053 NSO Maintenance space for SB www.nortekgroup.com...
  • Page 10 Figure 5. 4430-6010.01 Junction Box VM Operations www.nortekgroup.com...

  • Page 11: Placement Of Bottom Penetration & General Instructions

    3.1 Placement of Bottom Penetration & general instructions The Nortek VM Operations is based on the Doppler principle and must be completely submerged in water and should be installed in an area with minimal acoustic noise. The sensor head should not be installed close to the bow thruster propeller outlets, or other hull installations (outlets, vents or other protruding details), this to avoid unnecessary aeration or even cavitation and turbulence.
  • Page 12 Nortek will deliver a DNV class approved Bottom Penetration. See enclosed data sheet and GA for details of the Bottom Penetration. When handling the Bottom Penetration assembly, all lifting devices must be attached on the outside of the valve. The Bottom Penetration assembly should be placed in a service accessible place, large enough for installation/ disassembly/maintenance of the sensor head and the gate valve.

  • Page 13: Nso Sb Flange Welding

    4. NSO SB Flange welding • Cover the threaded holes and protect the inside the NSO SB Flange (item 2, drawing no. 2043-053) before welding. Handle with care! • Cut a hole with a diameter of Ø 342mm in the ship’s hull. •...

  • Page 14: Assembling

    5. Assembling This chapter provides instructions for assembly. It first introduces the breakdown of subassemblies and then gives instructions on how to install each subassembly. www.nortekgroup.com...

  • Page 15: Subassembly

    5.1 Subassembly There are 3 main subassemblies: • NSO SB Flange and Gate Valve • NSO Assembly for SB (Drawing no. N2043-040) • NSO Bell Housing Assembly (Drawing no. N2043-065) Otherwise see the main drawing (Drawing no. N2043-053) for item numbers / inventory numbers.

  • Page 16: Nso Sb Flange And Gate Valve

    N2043-053 • Glue the threaded rods into the bottom flange by using Loctite (strong, green 270), that is included in the Nortek shipment. • The top of the treaded rods should protrude 58,0mm - 59,5mm when measured from the surface of the flange area (NOT from the top of the Gasket surface area).

  • Page 17: Mounting Gate Valve To Nso Sb Flange

    5.2.1 Mounting Gate Valve to NSO SB Flange See drawing no. N2043-053 for relevant item numbers. • Place the Gasket on the top of the bottom flange, then lower the Gate Valve (approx. 85 kg) (with open gate) using appropriate lifting gear. •...

  • Page 18: Preparing The Sensor Head For Use

    5.3 Preparing the Sensor Head for use If the unit was not filled on arrival, the transducer chamber should be filled with distilled water, leaving a minimal amount of air in the transducer chamber. It can help to rotate the sensor to allow the larges air bubbles to escape and to allow the tiny air bubbles flow upwards to the filling hole overnight.
  • Page 19 Use a funnel and a small bottle or a syringe or a laboratory wash bottle. Fill till the camber completely without injecting any air. Keep the transducer opening open to allow air to escape. When the chamber is clos to full keep injecting water into the water of the transducer chamber while carefully retrieving the outlet.

  • Page 20: Replacing The Polycarbonate Front Window

    Remove the plastic protection foil in case this is still present on the front window. 5.3.2 Replacing the Polycarbonate Front Window Tighten and untighten the 8 screws using the star method as 5.4. Clean the surface and check the status of the O-ring. Outside Replace the window and mount it with the small surface...

  • Page 21: Combine The Subassemblies

    5.4 Combine the Subassemblies NSO Bell Housing Assembly drawing no. N2043-065 Please note that the dimensions of the junction box differ and do not comply with drawing N2043- 065, see chapter JB Cable connections. NSO Assembly for SB drawing no. N2043-040 Please note that the sensor head requires to be filled with distilled...
  • Page 22 N2043-065 carefully! Only loosen the top nut and avoid rotating the whole Skindicht. Please use the Nortek supplied thin wrench for this. See the arrows in the illustration. Loosen the top nut enough to allow the extension pipe to pass through the Bell Housing.
  • Page 23 Thread and pull the extension pipe all the way through, so that the transducer window is flush with the flange of the bell housing. If possible, pull the instrument so that the transducer window is just inside the bell housing. Ensure that cable is protruding from top of extension pipe.

  • Page 24: Install The Bell Housing Including The Nso Assembly For Of The Sb On The Gate Valve

    5.5 Install the Bell Housing including the NSO assembly for of the SB on the Gate Valve The Gate Valve must be closed! Place the gasket, item 3, in drawing no. N2043-053 on the Gate Valve. Place the arrangement assemblies on top of the Gasket. Use proper lifting gear to position the arrangement without damage.
  • Page 25 Align parts before tightening the nuts! Use the (star) method of tightening the nuts as shown in the figure. For each torque setting, repeat the star method until all nuts are tightened to that torque. Only then go to the next torque setting, and again, repeat the star method until all nuts are tightened to that torque.
  • Page 26 Loosen the Skindicht (item 8) drawing no. N2043-065 to allow the extension pipe to pass through the Bell Housing Using the extension pipe, lower the pipe (instrument arrangement) carefully all the way until the transducer lands on the bottom of the flange edge. It must be flush with the ship’s bottom hull! Check and verify that the...
  • Page 27 Take a picture of the completed installation showing the top part of the extension pipe in the Bell Housing and a picture from below the vessel, showing the transducer window being flush with the hull. Please send the pictures to Nortek Netherlands B.V. for documentation of the completed installation.

  • Page 28: Jb Cable Connections

    The dimensions of the junction box (JB) do not correspondent to those in drawing N2043-065. The correct design and dimensions of Nortek junction box model 4430 are noted in the figure to the right. The cabinet is in accordance to...
  • Page 29 The bottom plate is fitted with three cable glands and one connector. A cable gland for a yard standard power cable towards the yard power supply (100-240V AC / 70W) M20x1.5, cable diameter 6-13mm A cable gland for serial output M16x1.5 with a cable diameter 5-10mm A cable gland is fitted for the cable to the sensor...

  • Page 30: Processing Unit

    5.7 Processing Unit Version 4420 of the Nortek Vessel Mounted processing unit is designed to be fitted in a 19” survey rack inside a conditioned room. Housing 19” rack-mountable 2HE Dimensions 482x88x400 mm 100-240 V AC, 100 W Input Max.

  • Page 31: Disassembly

    6. Disassembly To disassemble the NSO SB assembly follow the steps bellow: Disconnect the cable between the sensor head and the junction box (item 10) drawing no. N2043- 065. Unscrew the screws on top of the Roxtec Seal (item 8, drawing N2043-040), to allow the cable and seal to move relative to the extension pipe.
  • Page 32 065) that hold the clamp (item 4, drawing N2043-065) in place. Loosen the Skindicht carefully! Loosen the top nut of the Skindicht with the Nortek supplied wrench without moving the Skindicht itself. See the arrows in the illustration. The seawater will flow up in...
  • Page 33 Close the Gate Valve by turning the wheel. This should stop the seawater from flowing Unscrew the two M8 bolts (item 5, drawing N2043-065). Put them into the two holes further from the centre of the clamp (item 4, drawing N2043-065). Tightening them in the outer threaded holes will force open the clamp.
  • Page 34 Remove the bolts (item 10), washers (item 9), nuts (item 5) and lock washers (item 6) drawing no. N2043-053. The seawater inside instrument housing will flow out on deck. After the gate valve is closed, the flow of seawater should stop before you loosen the bolts completely.
  • Page 35 Lay the Bell Housing on its side for easier (dis)assembly. Unscrew the two M8 bolts (item 5, drawing N2043-065). Put them into the two holes further from the centre of the clamp (item 4, drawing N2043-065). Tightening them in the outer threaded holes will force open the clamp.
  • Page 36 Loosen the Skindicht carefully! Loosen the top nut of the Skindicht with the Nortek supplied wrench without moving the Skindicht itself. See the arrows in the illustration to allow the extension pipe to pass through the Bell Housing. Separate N2043-040 from N2043-065.

  • Page 37: Assembling The Nso Bell Housing

    Mount the Skindicht sealing gland (item 8) carefully and ensure the hole and O-ring are clean and in proper state! Use the Nortek supplied (70mm) wrench to tighten the Skindicht on the Bell Housing Thread the two M16 thread rods...
  • Page 38 Mount the top clamp (item 4) onto the threaded rods (item 2). Thread the two hex nuts M16 (item 3) onto each rod and use these to secure the clamp in place Mount the bracket (item 6) for the Junction Box onto the top of the Bell Housing (item 1) with three spring washers M6 (item 9) and three machine screws M6...

  • Page 39: Assembling The Sensor Head For The Sb Penetration Unit

    (item 2) and the sensor head adapter pipe (item 3). Lubricate the O-ring with Molykote silicone, supplied in the Nortek toolbox. Place the O-ring (item 2) in the groove on the sensor head. Align the sensor head and pipe adapter. Make sure the “X”-...
  • Page 40 End extension pipe (item 6). Lubricate O-ring with Molykote silicone, supplied in the Nortek toolbox Mount the two O-rings (item 5) on the End extension pipe. Thread the cable through the End extension pipe. Align the pipes. Use the markings for the alignment.
  • Page 41 Thread the cable through the Roxtec RS31 seal (item 8) and mount it on the top. Tighten the top screws on the Roxtec seal. www.nortekgroup.com...

  • Page 42: Maintenance Of The Sensor Head

    7. Maintenance of the Sensor Head We recommend a regularly scheduled procedure which will act as a preventative measure to ensure your installed NSO assembly continues functioning as intended. The following sections can be used as a maintenance guideline for the components that may be exposed to wear and tear.
  • Page 43 The grounding point should always be free from biofouling. It is important to keep connectors clean and well lubricated. Before plugging in connectors, we recommend to always blast the pins with compressed air, inspect them for cleanliness and then protect the cable connector by applying a thin layer of silicone lubricating spray on the pins before you plug it into the instrument.
  • Page 44 Instrument cable care • Do not pull on the cable to disconnect connectors. • Avoid sharp bends at cable entry to connector. • Ensure that the cable is fixed to the mounting fixture to avoid mechanical stress to the connection. O-rings are the critical component that keeps water out of the housing and thus the instrument dry and functioning.

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