Confirm the exact EDI module model and applicable manual before selection or commissioning. Feedwater tables, rated flows and water-quality figures for another model cannot be copied into Gudian equipment specifications.
Evidence in the 2026 module manual
Revision 8 of the IONPURE VNX manual, dated May 2026, lists model-specific feedwater requirements involving factors such as conductivity, hardness, silica and carbon dioxide. It requires confirmation of flow and pressure before electrical power is applied. Whether RO permeate can feed an EDI module must still be checked against the selected model.
A suggested handover sheet
| Item | Record to retain | Confirmation needed |
|---|---|---|
| Module identity | Model, serial number, manual revision and purchasing documents | Does the installed module match the design? |
| Feedwater | Analysis at the relevant sampling point, sampling conditions and date | Do the parameters and units cover this model’s requirements? |
| Permission to start | Confirmed water flow, conditions for energizing and commissioning records | Do the interlocks and operating procedure agree? |
| Abnormal states | Responses to loss of flow, instrument faults and power faults | How is the system stopped, reported and restored, and who confirms recovery? |
| Water-use duty | Point-of-use requirements, sampling position, repeat tests and acceptance agreement | Does the result represent the actual point of use? |
Separate equipment configuration from use requirements
“EDI included” describes a process and configuration. Suitability for a production task depends on its water-quality requirements, operating conditions and acceptance results. Without a model and reports, a webpage should not promise ultrapure quality, continuous stability or maintenance-free operation.
Frequently asked questions
Does EDI mean the entire system uses no chemicals? That is too broad. Module operation, upstream treatment, cleaning and maintenance are separate matters to check.
Can this webpage be used to commission equipment directly? It gives no electrical wiring, chemical-cleaning or interlock-bypass instructions. Suitably qualified personnel should use the actual equipment documents.
References and scope
References checked on 9 October 2026. These are public reference materials. Gudian prepared the information checklists for project enquiries. A supplier manual does not establish a brand authorization for this website, and a paper does not show that Gudian equipment has achieved its research results.
- IONPURE VNX CEDI Modules Operation and Maintenance Manual; Rev. 8, May 2026. For the VNX models listed in the manual; not a claim about Gudian’s supplied models or output purity.
Further preparation
Equipment and consumable requirements can first be discussed remotely. Supply, installation and site visits are confirmed for each project. Send only the equipment and water-quality information needed for the enquiry, and conceal personal contact details and sensitive third-party information in photographs.