Industrial VFD-Controlled Pump System with Dual Danfoss Drives

Overview

This Professional Industrial Pump System features dual Danfoss VLT 6000 HVAC Variable Frequency Drives controlling high-capacity pumps for critical HVAC applications. The system includes complete motor control, safety disconnects, pressure monitoring, and professional piping assembly. With redundant VFD control and heavy-duty pump construction, this system ensures reliable, energy-efficient operation for commercial and industrial water circulation applications.

Design and Performance

VFD Control System

• Manufacturer: Danfoss
• Model: VLT 6000 HVAC Series
• Quantity: Two (2) VFD units
• Application: HVAC-specific programming
• Interface: Digital display with keypad
• Configuration: Lead/lag capability
• Disconnect: Individual safety disconnects

Motor Specifications

• Manufacturer: U.S. Electrical Motors
• Power: Multi-HP capacity
• Voltage: 208-230/460V
• Type: NEMA Premium Efficiency
• Inverter Suitable: Yes
• Service Factor: 1.15
• Enclosure: TEFC

Complete System Package

Main Components

• Two (2) industrial centrifugal pumps
• Two (2) Danfoss VLT 6000 HVAC VFDs
• Complete motor control panel
• Safety disconnect switches
• Pressure gauge (0-150 PSI)
• ASME relief valve (30 PSI set)
• Professional piping assembly
• Honeywell valve actuators
• Complete mounting framework

Control Features

• VFD Benefits: Variable speed control
• Energy Savings: Optimized pump operation
• Soft Start: Reduced mechanical stress
• Monitoring: Real-time performance data
• Protection: Built-in motor protection
• Communication: BACnet/Modbus capable

Key Specifications

Pump Details

• Type: End suction centrifugal
• Configuration: Dual pump system
• Pressure Rating: 150 PSI system
• Relief Valve: 30 PSI ASME certified
• Capacity: 3,300,000 BTU/HR
• Connection: Flanged inlet/outlet

VFD Specifications

• Series: VLT 6000 HVAC
• Control: Closed-loop PID
• Display: LCD with multi-language
• Programming: HVAC-optimized
• Protection: IP20 enclosure
• Compliance: UL/CSA certified

System Features

Advanced Control

• Variable speed operation
• Automatic lead/lag alternation
• Pressure-based control
• Flow optimization
• Energy monitoring
• Fault diagnostics

Safety Systems

• Individual disconnects with lockout
• ASME relief valve protection
• Emergency stop capability
• Overload protection
• Phase loss protection
• Dry run protection

Automation Integration

• Actuators: Honeywell ML6425/ML7425
• Control: 0-10 VDC or 2-10 VDC
• Feedback: Position feedback available
• Spring Return: Yes
• Torque: 35 lb-in (ML6425), 70 lb-in (ML7425)

Ideal Applications

• Commercial HVAC Systems
• Chilled Water Plants
• Condenser Water Systems
• Campus Distribution
• High-Rise Buildings
• Industrial Process Cooling
• Data Center Cooling
• Hospital Critical Systems
• Variable Flow Systems
• Energy-Efficient Retrofits

Technical Advantages

VFD Benefits

• Energy Savings: Up to 50% reduction
• Soft Starting: Eliminates water hammer
• Speed Control: Matches system demand
• Extended Life: Reduced mechanical wear
• Diagnostics: Built-in troubleshooting
• Communication: Building automation ready

System Benefits

• Redundant pump configuration
• Individual pump control
• Automatic backup operation
• Pressure-based optimization
• Remote monitoring capability
• Maintenance mode operation

Installation Requirements

• Three-phase electrical supply
• Adequate ventilation for VFDs
• EMC-compliant wiring practices
• Proper grounding system
• Line reactors if required
• Control wiring separation
• BMS integration planning

Control Capabilities

VFD Functions

• PID control loops
• Sleep mode function
• Cascade pump control
• Constant pressure mode
• Flow compensation
• Schedule operation
• Alarm management

Monitoring Features

• Real-time speed display
• Power consumption
• Operating hours
• Fault history
• Pressure monitoring
• Temperature monitoring
• Maintenance alerts

Safety & Compliance

• VFDs: UL Listed
• Relief Valve: ASME Section VIII
• Motors: NEMA Premium Efficiency
• Installation: NEC compliant
• Disconnects: Lockout/tagout capable
• System: Industrial safety standards

Package Includes

✓ Two (2) industrial pumps

✓ Two (2) Danfoss VLT 6000 HVAC VFDs

✓ Control panel with disconnects

✓ Pressure gauge (0-150 PSI)

✓ ASME relief valve (30 PSI)

✓ Honeywell valve actuators

✓ Professional piping assembly

✓ Mounting framework

✓ System identification tags

Component Details

Bell & Gossett Components

• Triple Duty Valve: Combination shut-off, check, and balancing
• Relief Valve: Model 3301, 30 PSI set point
• Capacity: 3,300,000 BTU/HR
• Inlet: 1-1/2 inch
• Certification: ASME/HV rated

System Identification

• Tag: NJ162112-12U
• Location: Mechanical room installation
• Configuration: Parallel pump arrangement

Energy Efficiency

• VFD control reduces energy consumption
• Matches pump speed to system demand
• Eliminates throttling losses
• Reduces peak demand charges
• Extends equipment life
• ROI typically 1-3 years

Maintenance Features

• Front-access VFD panels
• Individual pump isolation
• Diagnostic displays
• Runtime balancing
• Predictive maintenance alerts
• Easy filter access
• Standard replacement parts