Greenheck Fan Centrifugal Roof Downblast Exhaust Fans GB - Manual (Page 47)

47
Specifications
Vari-Green
®
Vari-Green ® Motor
Motor to be an electronic commutation (EC)
motor 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.
LEED information
Greenheck became one of the first manufacturers
in the Air Movement and Control industry to join
the LEED/green movement when they joined the
United States Green Building Council (USGBC) in
2005. Greenheck has been actively researching
qualification requirements for our products to meet
LEED credits and prerequisites.
Vari-Green ® Control - 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.
Vari-Green Control - Two Speed
Two speed control shall be a Vari-Green Control
specifically designed to allow the Vari-Green Motor
to operate at two discrete speeds. Two 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 115/208-240 volt
AC power to 24 volt AC power.
Vari-Green Control – Indoor Air Quality –
Temperature / Humidity
Control to be a packaged indoor air quality control
designed to regulate fan speed based on level of
temperature and/or relative humidity in a space.
Control shall include a Proportional Integral Derivative
(PID) feedback loop and shall have labeled terminal
strips for easy wiring. Fan shall be direct drive
including an electronic commutation (EC) Vari-Green
Motor. Control package shall be Vari-Green Indoor Air
Quality – Temperature / Humidity Control.
Vari-Green Control – Indoor Air Quality –
VOC (Volatile Organic Compound)
Control to be a packaged indoor air quality control
designed to regulate fan speed based on level of
VOC concentration in a space. Control shall include
a Proportional Integral Derivative (PID) feedback loop
and shall have labeled terminal strips for easy wiring.
Fan shall be direct drive including an electronic
commutation (EC) Vari-Green Motor. Control package
shall be Vari-Green Indoor Air Quality – VOC Control.
Vari-Green Control – Constant Pressure
Control to be a packaged constant pressure control
designed to regulate fan speed based on demand.
Control shall include a Proportional Integral Derivative
(PID) feedback loop and shall have all components
prewired to labeled terminal strips for easy wiring.
System shall include the appropriate pressure tap and
preset pressure transducer. Fan shall be direct drive
including an electronic commutation (EC) Vari-Green
Motor. Control package shall be Vari-Green Constant
Pressure Control.
Indoor installations shall include pressure tap
(duct or room) and control box with integral pressure
transducer.
Outdoor installations shall include duct pressure tap,
pressure transducer, and control box. Control box
shall be prewired and in a NEMA-3R weather tight
enclosure for mounting outdoors near the fan location.
The Vari-Green ® motor significantly helps
qualification efforts for the Energy and
Atmosphere credits and prerequisites;
specifically credit one, Optimize Energy
Performance and prerequisite two,
Minimum Energy Performance.