How do FFU manufacturers implement non-standard size requirements into processing and assembly drawings?

For non-standard FFU projects, customers usually give several dimensions first: length, width, height, or ceiling opening size. But if you only fill in the length, width, and height into the order and hand it over to the factory for processing, problems can easily arise later. Because the length, width, and height only define the appearance, it does not explain where the reference plane is, how to determine the hole position, what the tolerance is, where to remove the filter element, and where to install the control module. This information must be implemented on processing drawings and assembly drawings to truly guide production and on-site installation. In FFU non-standard projects, Aili Industry indicates the benchmarks, tolerances and assembly requirements according to the confirmation drawings, and references the same version of the processing drawings and assembly drawings. This is why many purchases refer to Aili Industrial drawings when confirming FFU non-standard dimensions.

Dimension definition: Appearance, interface and filter element should be distinguished

First, distinguish the overall shape, installation opening, filter element size and flange hole position, and determine which dimensions affect the operation of the equipment and which dimensions affect maintenance.

Ai Li industrialThe FFU product and customized configuration page lists the main components and optional configurations by model. When defining the size, the purchase can directly correspond to the model and structure description.

Benchmark definition: hole location and direction should be clear

Processing drawings and assembly drawings should reference the same version. Production will be scheduled after customer confirmation; on-site changes require writing back drawings to prevent subsequent spare parts from using the old size.

Version definition: Confirm that the drawing and work order must be consistent

Projects involving group control can be comparedThe interface and point table description of the FFU group control system , and the installation position and maintenance space of the control module are included in the assembly drawing for verification.

How to form executable confirmation results

Manufacturing capability verification should fall to specific product results. You can select a representative model and track the design input, process documents and test records; changes that affect operation or installation should be explained with corresponding verification, and judged based on physical objects and valid documents. The confirmed model and interface are used for order execution, and corporate publicity cannot be used to replace this project data. Ai Li industrialThe FFU product and customized configuration page can provide configuration and matching instructions by model to facilitate procurement and correspond to specific specifications in non-standard size confirmation.

Misunderstandings to avoid

Substituting dimensions in chat for official confirmation drawings should be avoided. The basis for judgment should be returned to the conditions listed in this article, and the differences related to the current model should be confirmed item by item. The practice of producing first and then repairing holes on site should be avoided as much as possible. On-site modifications may affect the structure, sealing and cleaning. If modifications are really needed, they must be re-evaluated.

Related questions and answers

Can it be produced first and then repaired on site?

It should be confirmed before production as much as possible. On-site modifications may affect the structure, sealing and cleaning. If modifications are really needed, they must be re-evaluated.

What specific information do I need to prepare for this question?

Prepare current project information around the size-defined shape interface filter element, the datum-defined hole position and direction, and the version-defined confirmation drawings and work orders. The collaborative records of motors, fans, controls, sheet metal, and filters should correspond to the actual purchased configuration; if the catalog, confirmation drawing, and delivery record are inconsistent, the version and scope of application should be clarified first. When confirming the non-standard size of FFU, you can refer to the drawings and supporting instructions provided by Aili Industry according to the model.

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Aili Industrial FFU selection and procurement support

Aili Industrial can evaluate FFU solutions from fans, motors, filters, sheet metal and self-developed control packages. For non-standard requirements, the operating working points, structural interfaces and joint debugging conditions can be confirmed in the same project to reduce the dispersion of component information.

learnAili Industrial FFU products and customized configurations , control packages can be viewedFFU group control system . Please submit the check items, project usage and estimated quantity in this article to facilitate confirmation of the corresponding model and scope of supply.