Chiller glycol coolant and coolant inhibitors are among the most important preventive-maintenance fluids for any central cooling system in Saudi Arabia, they protect the loop from freezing in winter and from corrosion and scale year-round, whether that’s the main chiller loop or the VSD (variable speed drive) and SSS (solid-state starter) cooling loops. The most common mistake technicians make is using the same fluid for both loops, when in fact they need two completely different products. Al Madina Cool (Cool.sa) stocks both types genuine from YORK: standard 40% propylene glycol coolant in a 20-liter container for the main loop, and a dedicated blue coolant/inhibitor in a 4-liter container for VSD/SSS loops, each listed with its exact concentration and OEM part number.
Which Product Do You Need?
| Criteria | Chiller Glycol Coolant (20L) | VSD/SSS Coolant Inhibitor (4L) |
| Part Number | 013-03344-000 | 013-04129-000 |
| Application | Main chiller cooling loop | VSD & SSS cooling loops only |
| Color | Clear / colorless | Blue |
| Concentration | 40% propylene glycol | Ready-to-use inhibitor blend |
| Freeze Protection | Approx. -24°C | Not intended for general freeze protection |
| Size | 20 Liters (5 Gallons) | 4 Liters (1 Gallon) |
Simple rule: If you're servicing the chiller's main cooling loop (evaporator, coils, main piping) → use the 20L glycol coolant. If you're servicing the VSD drive or SSS starter cooling loop → use only the blue 4L inhibitor. Don't substitute one for the other, using the wrong fluid can reduce electronics cooling efficiency or weaken freeze protection on the main loop.
FAQ
Q1. What's the difference between chiller glycol coolant and VSD/SSS coolant inhibitor?
Chiller glycol coolant (40% propylene glycol) protects the main cooling loop from freezing and corrosion. VSD/SSS coolant inhibitor is a separate blue fluid specifically formulated to protect variable-speed drive (VSD) and solid-state starter (SSS) cooling circuits.
Q2. Can I use VSD inhibitor instead of general glycol coolant?
No. Each product is engineered for a different cooling loop, and substituting one for the other can reduce cooling performance or void the manufacturer's warranty.
Q3. How do I know which loop needs checking?
Check your chiller's service manual to identify the cooling loop, or contact us and our technical team will confirm the correct product and compatibility before you order.
English 
العربية