The MCH Series - For HVAC Professionals

Designed for HVAC Professionals, the MCH Series is an ideal solution for flow and volume control of fans, pumps and cooling towers. Variable frequency drives not only provide better regulation of the system (and thereby greater comfort), but save significant energy compared with classical damper and valve systems.

These NEMA 1 controls are available from 1/4 hp to 250 hp. "Contractor Ready" assemblies feature a hinged cover and installed options that can include a disconnect, fuses, line reactor or 3-contactor bypass.

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Designed for centrifugal loads as found in fan, pump and cooling tower applications. The MCH Series is designed to control these applications by the most energy efficient means: direct motor control.

Whether you specify, install or operate HVAC systems, you can rely on the drive built specifically for HVAC Professionals.

Whether you specify, install or operate HVAC systems, you can rely on the drive built specifically for HVAC Professionals.

The User Manual and Data Sheets for the MCH Series Drive are available in the AC Tech Library on our website.

General Specifications
Horsepower: 1 to 250 HP (0.75 to 185kW)

Supply Power:
Three Phase: 208, 240, 400, 480 or 590VAC
50 or 60 Hz (+10/-15%)

Motors: The MCH is designed to operate standard
polyphase induction motors rated for
200, 230, 400, 460 or 575VAC from 0 to 120Hz.

Enclosure: NEMA 1 is standard for drive & options
NEMA 12 available for drive only.

Standard Features
Easy set-up and operation: The MCH offers intuitive operator interface using plain English programming and operational information.

• 2-line, 32 character backlit display
  
• Keypad with H-O-A operation
  •
• Personal computer interface using

AC Tech's free TechLink Software

PID set point control: Let the drive software adjust the motor speed to maintain a preset pressure, flow, temperature or other independent variable.

• Remote enable/disable
  
• Direct or reverse acting
  
• Transducer calibration
  
• High/Low level alarm

Motor Thermal Overload: The MCH includes UL and cUL approved motor protection device for single motor applications.

MCH Installed Options
Pre-Engineered and factory installed, MCH options are "Contractor Ready" providing the following benefits:

• Rugged steel enclosure with hinged cover.
  
• Plenty of knockouts that allow for top or bottom conduit runs.
  
• Generous wire ways.
  
• Oversized terminal strip duplicates all the VFD terminals with plug connections that allow easy removal of the MCH Series without disturbing any field wiring.

Branch Circuit Protection:
Choose either a Circuit Breaker or Disconnect with fusing, both offer door interlocked rotary handle. If branch circuit protection is located elsewhere, door interlocked disconnect switch is available without fusing.

Input Line Reactor:
The most recommended complement to a good drive installation. The input reactor adds protection for the drive against common electrical noise and line spikes while reducing noise and harmonics back to the supply mains.

Drive Bypass:
Three-contactor drive bypass completely isolates the drive when operating the motor at full speed directly across the line. Contactor logic and controls are operated at 115VAC and include pilot light operators and door mounted controls.

AC Technology Corporation, Inc., 660 Douglas Street, Uxbridge, MA 01569. Tel: 508-278-9100; Fax: 508-278-7873.