How to write FFU purchase list? To what extent should the model, quantity and configuration be clear?

Direct answer: The FFU purchase list should itemize the model, overall dimensions, quantity, air volume and static pressure under design conditions, filters, power supply, control method and installation requirements by application area. Quantities of prototypes, spare parts and subsequent expansions should be noted separately. Simply writing 'FFU, several units' or 'HEPA FFU of a certain size' is not sufficient as a basis for quotation, production and acceptance.

Batch cleanroom projects often use FFUs with the same dimensions and different performance or control configurations in different areas. If only one product name is written in the purchase list, it is easy to find that the filter model, operating gear, communication interface or maintenance method are inconsistent with the on-site requirements. The list should beThe model of the FFU fan filter unit corresponds to the actual project configuration.

A one-line list, at least clarify this information

Among them, the product model is used to identify the device, and the configuration field is used to lock the project delivery content . If the same model is allowed to be equipped with different filters or control components, the list should indicate the final version selected.

Quantities should be filled in by area to avoid totals covering up differences.

Purchase quantities should correspond to floor plans, ceiling plans and control zones. Each area first calculates the number of units based on the target air supply volume and the effective air volume of a single FFU under project conditions, and then checks the air supply coverage, beam positions, lamps, return air paths and maintenance spaces.

If the project is constructed in phases, the number of installations in each batch and the number of reserved expansions should be stated. Prototypes, spare filters and spare parts should not be mixed with the number of units installed on site, otherwise the total number of purchases and the actual layout may not be reconciled.

Air volume and static pressure should not be written as two isolated maximum values.

The air performance in the inventory should refer to the operating conditions agreed upon in the technical agreement, such as specified filters, operating gears, test positions and resistance conditions. The maximum air volume and maximum static pressure may correspond to different working points respectively and cannot be directly used as project acceptance indicators.

When multiple FFUs need to be uniformly adjusted or monitored, the partitions and communication requirements to which they belong should also be marked in the list and communicated with them.the FFU group control system correspond to each other. The controller, address and expansion plan of In this way, the equipment quantity and control configuration can be consistent during the procurement stage.

Ai Li Industrial Batch Project List Package

Aili Industry can combine the cleanliness target, target air volume, installation size, filtration requirements and control zones to match the fan, motor, filter, box and complete machine configuration. For standard suspended ceilings and equipment-side non-standard projects, configuration lines can be established separately, and the size, performance and interfaces can be checked through prototypes first, and then the confirmation results can be used for batch lists and technical agreements.

An executable FFU procurement list should enable the purchaser, manufacturer and on-site acceptance party to answer the same question: **Which unit should be installed at each location, what configuration should be used, and what performance should be achieved under what working conditions. **Specific parameters and delivery requirements are subject to the project technical agreement and test results.