Variable Primary Flow Systems (VPF)

Chilled Water Packaged Pumping System Variable Primary Flow

EnviroSep Model #VPF, Variable Primary Flow, Chilled Water Packaged Pumping System is a UL-Listed, factory manufactured system utilized in conventional building cooling systems which uses Chilled Water as the cooling medium. The Model VPF provides energy savings by automatically controlling the speed of the System Chilled Water Pumps, while maintaining Minimum Acceptable Chiller Evaporator Flow. Based on the actual building system demand, Differential Pressure Transmitters (or alternate sensors) signal the Non-proprietary PLC-based, Variable Speed Controller to operate the pumps at the appropriate conditions to meet demand. Chilled Water Return is supplied to the System Chiller(s) and the Chilled Water Supply is automatically, decoupled through a common header by using a Modulating Chiller Bypass Control Valve and Chiller Flowmeter or Differential Pressure Transmitter.

The Model VPF may be controlled by other system variables, such as Total System Load (BTU/hr), System Pressure, Zone Differential Pressure, or System Temperature via a customized Controller. Variable Frequency Drives may be incorporated with Manual or Automatic Bypasses. A User-friendly, Color Touch Screen Operator Interface is utilized for simple operation. The Model VPF Controller may be furnished with Interface to any Building Management System.

Standard Features:

• Base-mounted, End-suction Pumps or Split-coupled Vertical Inline Pumps
• Variable Frequency Drives & Controller
• Differential Pressure Transmitters
• Modulating Bypass Control Valve
• Vortex Air Separator, with Auto Air Vent
• Bladder Expansion/Compression Tank
• Triple Duty Valves & Suction Diffusers
• UL Listed NEMA 12 Industrial Variable Speed System
• Control Panel, with Siemens S7-300 or Allen Bradley ControLogix PLC
• Make-up Water Assembly, with Safety Relief Valve
• Chemical Bypass Feeder
• System Temperature Transmitters
• Chilled Water Supply Flow Meter

Options:

• Internet Connectivity for Remote System Monitoring
• Interface w/ Building Management System
• Chiller Staging Capability
• NEMA 3R/4/4X Rating
• Seismic or Vibration Isolators
• Combination Air & Dirt Separator
• Flexible Pump Connectors
• Specific Performance Criteria (Upon Request)