Greenheck Fan Specifications, Vari-Green Motor Specification, Constant Pressure, Remote Dial

Specifications

Vari-Green™Motor

Specification

Motor to be a DC electronic commutation type motor (ECM) specifically designed for fan applications.. AC induction type motors are not acceptable.. Examples of unacceptable motors are: Shaded Pole, Permanent Split Capacitor (PSC), Split Phase, Capacitor Start and 3 phase induction type motors.. Motors shall be permanently lubricated with heavy-duty ball bearings to match the fan load and prewired to the specific voltage and phase.. Internal motor circuitry shall convert AC power supplied to the fan to DC power to operate the motor. Motor shall be speed controllable down to 20% of full speed (80% turndown). Speed shall be controlled by either a potentiometer dial mounted on the motor or by a 0-10 VDC signal.. Motor shall be a minimum of 85% efficient at all speeds.

Vari-Green™Controls

Specification

Constant Pressure

Greenheck’s Constant Pressure system shall be a complete package designed to regulate fan speed based on demand while maintaining a constant static pressure.. System shall include fan with Vari-Green™ Motor, Vari-Green Constant Pressure control, transformer, and pressure tap.. Vari-Green Constant Pressure control shall have the transducer integrated with a touch button control panel.. Control shall have a run mode and a program mode preventing unwanted changes when in run mode. Transformer shall be factory supplied to provide power to the Vari-Green Constant Pressure controller.. System shall include a self-sealing aluminum pressure tube with ¼-inch connection.. Fan shall be centrifugal direct drive type in upblast, downblast, or inline configuration with controllable EC Vari-Green motor.

Remote Dial

Remote Dial shall be a Vari-Green™ control specifically designed to provide 0-10 volt DC signal to Greenheck’s Vari-Green Motor..

2-Speed

2-Speed control shall be a Vari-Green™ Control specifically designed to allow the Vari-Green Motor to operate at two distinct speeds. 2-Speed control shall include two dials that may be set at any point between 0 and 10 volts DC and an integral transformer capable of reducing 115/230 volt AC power to 24 volt AC power.

47