Facility Management (FM) is a strategic discipline that combines maintenance, engineering, energy management, financial control, safety, service quality, and customer satisfaction. For a complex facility such as a hospital, the dashboard must also measure clinical-service continuity, critical utility reliability, and patient safety. The objective is to move from simply reporting completed work orders to measuring whether the facility is safe, reliable, efficient, and delivering value. 1. What is a Facility Management Master Dashboard? A Facility Management Master Dashboard is a centralized reporting system that consolidates operational data from the Computerized Maintenance Management System (CMMS), Building Management System (BMS), energy meters, finance records, safety inspections, and customer feedback. 12 It allows senior management, facility managers, maintenance managers, and engineering teams to answer questions such as: Are critical assets available when required? Are prev...
Allowable
TSS in Chilled Water Closed Loop
A professional
explanation of the allowable
Total Suspended Solids (TSS) in a chilled water closed‑loop system, written in an engineering tone
suitable for technical documentation or maintenance standards:
💧 Allowable TSS in
Chilled Water Closed Loop
🔹 Definition
Total Suspended Solids (TSS) represent fine
particulate matter—such as rust, scale, silt, or biological debris—suspended in
the chilled water circuit. High TSS levels can cause erosion, fouling, and
reduced heat‑transfer efficiency in chillers, coils, and pumps.
🔹 Recommended Limits
|
Parameter |
Recommended Value |
Remarks |
|
TSS (Total Suspended Solids) |
≤ 10 mg/L (ideal) |
For clean, well‑maintained closed loops |
|
Acceptable Range |
10–25 mg/L |
Requires filtration and periodic flushing |
|
Critical Limit |
> 25 mg/L |
Risk of fouling, corrosion, and pump seal wear |
These values align with ASHRAE Guideline 12, BS RIA 2000,
and HVAC water treatment best practices.
🔹 Control Measures
- Side‑stream
filtration: 5–10 micron filters to continuously remove particulates.
- Chemical
treatment: Corrosion inhibitors and dispersants to prevent deposition.
- Periodic
sampling: Monthly analysis for TSS, conductivity, and pH.
- Flushing
and cleaning: During commissioning and annual maintenance.
- Magnetic
filters: For systems with steel piping to capture ferrous particles.
🔹 Impact of High TSS
- Reduced
heat‑transfer efficiency in coils and heat exchangers.
- Accelerated
corrosion and erosion of pump impellers and valves.
- Increased
maintenance frequency and chemical consumption.
- Potential
sensors malfunction due to particulate deposition.
✅ Conclusion
Maintaining TSS below 10 mg/L ensures optimal
performance, energy efficiency, and long‑term reliability of the chilled water
closed‑loop system. Regular monitoring and filtration are essential to sustain system
cleanliness and operational integrity.
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