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This document describes the scope and methodology of the Minimum System Safety Requirements Gap Analysis conducted at your facility. The analysis evaluates your ammonia refrigeration system against ANSI/IIAR 9-2020 with Addendum A-2024 ("IIAR 9"), the industry standard that establishes minimum safety requirements for existing closed-circuit ammonia refrigeration systems.
IIAR 9 requires that an initial evaluation of this kind be conducted for each ammonia refrigeration system no later than January 1, 2026, with revalidation at least every five years thereafter. This report is structured to satisfy that requirement, whether as your facility's initial evaluation or as a scheduled revalidation.
This analysis applies to existing stationary closed-circuit vapor compression refrigeration systems using ammonia as a refrigerant, consistent with IIAR 9's own scope. The evaluation covers four areas of the standard, summarized below.
| Chapter | Area Evaluated | Approach |
|---|---|---|
| 4 | Equipment and System Component Documentation | Verification that required manufacturer and materials documentation is on file |
| 5 | Inspection, Testing & Maintenance | Review of ITM records and program documentation for completeness against ANSI/IIAR 6 |
| 6 | System and Equipment Operation | Review of Standard Operating Procedures for completeness and content against ANSI/IIAR 7 |
| 7 | Minimum System Safety Requirements | Direct field observation and documentation review against IIAR 9's specific technical and physical requirements |
IIAR 9 recognizes that many existing systems were originally designed and installed under earlier codes and standards. Where those original requirements are more restrictive than IIAR 9, the original requirements continue to apply. Where IIAR 9 is more restrictive than the original requirements, or where the original governing code cannot be identified, IIAR 9 itself establishes the minimum requirement.
This means a finding in this report reflects a comparison against whichever requirement actually governs your system — not necessarily IIAR 9 in isolation. Where relevant, this report notes which standard governed a particular finding.
Chapters 4 through 7 of IIAR 9 are structured differently from one another, and this analysis follows that structure:
Each item evaluated is recorded as Compliant, Gap Identified, or Not Applicable, and is cross-referenced to the specific section of the governing standard so the finding can be independently verified.
Accompanying this report is a corrective action tracker, which lists each identified gap alongside a recommended corrective action, the party responsible for addressing it, and target/actual completion dates. The tracker is intended as a working document to help your team plan and document remediation — the report itself remains the complete and authoritative record of every finding.
IIAR 9 permits two ways to address an identified gap: closing the gap to meet the minimum requirement, or documenting a justification for declining to close it, using a recognized risk-ranking technique, an analytical tool, a quantitative risk analysis, or a variance obtained from your Authority Having Jurisdiction (AHJ). If your facility intends to pursue the latter path for any finding in this report, RCP can assist in documenting that justification appropriately — please contact your RCP representative to discuss.
Per IIAR 9, this evaluation should be revalidated at least every five years. Many facilities incorporate this revalidation into their existing Process Hazard Analysis (PHA) revalidation cycle where one is already in place. Your RCP representative can help align the timing of your next revalidation with your facility's existing compliance schedule.
If you have questions about this report, a specific finding, or how to plan corrective action, please contact your RCP representative at [Contact Name / Phone / Email].
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