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    AHU CHW Coil Connection

    Uploaded by

    MULTIKARTHI07
    The document provides assembly instructions for unit component sections. It outlines the following general procedure: 1) Prepare all mounting accessories and identify unit sections and mounting sequence. 2) Clean surfaces to be fastened and apply self-adhesive seals. Position sections ensuring parallel frames and add shims if needed. 3) Assemble sections from inside if possible, or use external fasteners like clips or brackets. Provide flexible couplings to allow for component removal.

    Copyright:

    Attribution Non-Commercial (BY-NC)
    Download as PDF, TXT or read online from Scribd

    AHU CHW Coil Connection

    Uploaded by

    MULTIKARTHI07
    4K views1 page
    The document provides assembly instructions for unit component sections. It outlines the following general procedure: 1) Prepare all mounting accessories and identify unit sections and mounting sequence. 2) Clean surfaces to be fastened and apply self-adhesive seals. Position sections ensuring parallel frames and add shims if needed. 3) Assemble sections from inside if possible, or use external fasteners like clips or brackets. Provide flexible couplings to allow for component removal.

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    AHU Chw Coil Connection

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    © Attribution Non-Commercial (BY-NC)

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    The document provides assembly instructions for unit component sections. It outlines the following general procedure: 1) Prepare all mounting accessories and identify unit sections and mounting sequence. 2) Clean surfaces to be fastened and apply self-adhesive seals. Position sections ensuring parallel frames and add shims if needed. 3) Assemble sections from inside if possible, or use external fasteners like clips or brackets. Provide flexible couplings to allow for component removal.

    Copyright:

    Attribution Non-Commercial (BY-NC)
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    4K views1 page

    AHU CHW Coil Connection

    Uploaded by

    MULTIKARTHI07
    The document provides assembly instructions for unit component sections. It outlines the following general procedure: 1) Prepare all mounting accessories and identify unit sections and mounting sequence. 2) Clean surfaces to be fastened and apply self-adhesive seals. Position sections ensuring parallel frames and add shims if needed. 3) Assemble sections from inside if possible, or use external fasteners like clips or brackets. Provide flexible couplings to allow for component removal.

    Copyright:

    Attribution Non-Commercial (BY-NC)
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
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    The following general procedure and sequence should be ■ All connections should be provided with flare or flanged

    followed for assembly of unit component sections. couplings to allow future easy removal and withdraw of
    ■ Remove and prepare all mounting accessories, usually coils.
    shipped inside fan section.
    ■ Identify all unit sections and their mounting sequence ■ All circuiting should be provided with air vent valves and
    according to the unit name plate indicated in Fig. 2. drain valves.
    ■ Carefully clean the frame surfaces of the elements that
    must be fastened together and place on one face the ■ Headers should not be subjected to any torsions during
    self-adhesive seal provided. (see Fig. 3) connecting works.

    ■ Always observe correct water flow to ensure counterflow


    type heat exchange.
    During fan stops no circulation of hot (or superheated)
    water should occur in the coils.
    This can be achieved either by interlocking water pump
    operation to the fan switch or by installing a bypass val-
    Self-adhesive seal ve to divert hot water circulation from coil. This is meant
    to prevent overheated stationary air in the fan section
    which will damage fan and motor bearings as well as the
    unit lining.

    Fig. 5 and 6 show some typical heat transfer coil connection


    Fig. 3 arrangements.
    Illustrated diagrams are offered as examples for general
    explication only. Pipe sizing should be calculated according
    to current codes and installation practice.

    Fig. 4

    Self-tapping
    screw

    ■ Position and pull the two sections close ensuring facing


    frames are fully parallel; add shims under base, if
    necessary.
    ■ Assemble sections. When frames of two adjacent sections
    are accessible from inside through panel doors or
    Fig. 5
    openings situated up or downstream, their fastening is
    Vertical coil
    made from inside the unit with bolts at the four corners Horizontal air
    and in additional intermediate positions according to unit flow
    dimensions. When frames are not accessible from inside,
    they are externally fastened with the insertion of clips or
    brackets.
    ■ Where this type of connection is not feasible, black nylon
    brackets are available on assembling ends for size 1
    through 21.
    All other sizes (22 through 35) have Kandar type joints.
    ■ No resilient material is needed between floor and unit
    base as the fan-motor group, assembled in the fan section,
    is mounted on antivibration pads. Also, fan discharge is
    internally connected to the section air outlet by means
    of a canvas sleeve coupling. Fig. 6
    Horizontal coil
    Vertical air flow
    Coils
    LEGEND
    1. Water inlet
    Water coils 2. Water outlet
    3. Shut-off valve
    ■ Remove plastic caps from pipe ends only immediately 4. Water flow calibration valve (optional)
    before hydronic connections are made. 5. Three-way valve (optional)
    Connecting piping should not force on the coils either 6. Water circuit bypass (optional, with 3-way valve)
    7. Compensation (expansion) joint
    with its own weight or for thermal expansion. Appropriate 8. Drain valves or drain plugs
    expansion joints with relevant supports must be provided. 9. Air vent
    10. Air flow

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