PREVAC
Tried-and-true technology in use for 30 years and installed on 30,000+ low pressure chillers around the world.
PREVAC Stationary System
Extend the lifespan and improve the operation of your low pressure centrifugal chiller with PREVAC. Useful on:
York YZ
Carrier AquaEdge
Trane CenTraVac Series E
Mitsubishi ETI-Z
And every other low pressure centrifugal chiller
The PREVAC System enhances the operation of low-pressure chillers using refrigerants R-1233zd(E), R-123, R-514a and R-11. PREVAC prevents air & moisture infiltration in idle chillers, eliminates surging on start-ups, and prevents acid damage and refrigerant release. It also eliminates electrical code violations during servicing (NFPA 70E, OSHA 1910.132), by eliminating the need for temporary high voltage and temporary water hose connections. The PREVAC system provides 1/100 of 0.0 PSI control for minor repairs and leak checking. High pressure alarm sounds before the bursting disc is activated. This system complies with ASHRAE 147 and ASHRAE 4.4.2 & 4.4.4, and enables safe and efficient chiller servicing.
The stationary PREVAC system provides:
“Pressure Seal” Mode 0.00psig Fixed Set Point
“Leak Test” Mode 0.00 to 6.00psig Adjustable Setting
1/100 psi Accuracy
Proportional Control
Pressure Activated and/or Electrically Interlocked
Water Heating Vessel
Fully Temperature Controlled
20kW 480v or 12kW, 240v Heating Capacity
Stainless Steel Housing for Heaters
350 psi Pressure Rating
30 gpm Pump
High Pressure Warning & Disconnect
30 amp Circuit Breaker
Audible and Visual Alarms
High Pressure Trip
BAS Interface
Purchase Price: $6,699
Looking for the Prevac Portable Pressurizer?
Downloadable PDF Resources
How the Prevac system works - Improved Performance and Servicing for Low-Pressure Chillers using R-1233zd(e), R-11, R-123, R-514A
How the Prevac works
This video goes over the basic operation of the Prevac system and how it works in relation to the low pressure chiller it controls.
Troubleshooting the Prevac system for low pressure centrifugal chillers
Troubleshooting the Prevac
We put together a video to help with troubleshooting the Prevac. There is a table of contents at the beginning of the video to help with navigation. If you are still having trouble, feel free to give us a call and we can walk you through some troubleshooting procedures.
