prevention, of, PREVAC

The PREVAC system improves low pressure chillers performance and assures personnel safety for years of chiller operation by:

1)Maintaining your chiller's refrigerant pressure the same as the atmospheric pressure whenever the chiller is off line.

2)Enabling you to pressurize the chiller for leak testing safely at a push of a button.

3)Warning of high refrigerant pressure 5psi before the bursting disc ruptures.

4)Enableing you to perform minor repairs at zero.

The Benefits of a Chiller Kept at Amospheric Pressure:
-Chiller starts cooling imediately when started no matter how long the chiller has been idle.
-No surging at start-ups preventing damage to internal parts.
-Keeps moisture out of refigerant preventing acid formation in the refrigerant.
-No need to transfer refigerant to a separate vessel.

The Benefit of a High Pressure Warning
-Prevents refigerant loss before refigerant pressure reachs the bursting disc or relief valve pressure settings.
-Alarms are audible, visual, and BAS interface.

The Benefit of having a Permanent Pressurization System for Leak Testing
-Enables anyone at anytime to pressurize for leak testing.
-Reduces labor hours.
-Pressure raised the same way everytime, no concern about to hot of water warping tubes.
-Eliminates the risks of the temporary electrical code violations.
1)Connections made by non-license personnel.
2)Equipment being connect without UL,ETL or CSA approvals.
3)Equipment being connected without the proper fusing.
4)Eliminates exposed high voltage connections around temporary water connections.
-Prevents anyone from bringing in open flame propane devices into an equipment room violating fire codes and air safety.

The Illustration Below Depicts Some of the Unsafe Leak Testing Practices.

PREVAC SYSTEMS INCLUDES

Refrigerant Pressure Controller
-"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
-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