Greenheck Vari-Green Control - Constant Pressure Indoor (474766) - Manual

PN 474766
Vari-Green Control
Constant Pressure
1
Installation, Operation and Maintenance Manual
Please read and save these instructions for future reference. Read carefully before attempting to assemble,
install, operate or maintain the product described. Protect yourself and others by observing all safety
information. Failure to comply with instructions could result in personal injury and/or property damage!
Constant Pressure Control
Constant pressure control is a packaged system
specifically designed to control a fan with a Vari-
Green motor. The controller has two major modes;
controlling pressure on the fan inlet, exhaust
control; and controlling pressure on the fan outlet,
pressurization control. Exhaust control has a cutout
feature that shuts off the fan when there is no
demand on the system. In both modes closing an
override input sets the fan to a constant speed.
The system includes a fan with Vari-Green motor,
pressure tap, and controller. The system is designed
with considerations for lint laden air. Performance
ranges from 500-3000 CFM and up to ±1 inch of
pressure. Fan models available are G, CUE, CW,
and SQ. Each system shall bear a manufacturer’s
nameplate.
DANGER
Always disconnect, lock and tag power source before
installing or servicing. Failure to disconnect power
source can result in fire, shock or serious injury.
CAUTION
When servicing the fan, motor may be hot enough
to cause pain or injury. Allow motor to cool before
servicing.
CAUTION
Precaution should be taken in explosive
atmospheres.
General Safety Information
Only qualified personnel should install this product.
Personnel should have a clear understanding of
these instructions and should be aware of general
safety precautions. Improper installation can result
in electric shock, possible injury due to coming in
contact with moving parts, as well as other potential
hazards. Other considerations may be required
if high winds or seismic activity are present. If
more information is needed, contact a licensed
professional engineer before moving forward.
Follow all local electrical and safety codes, as well
as the National Electrical Code (NEC) and the
National Fire Protection Agency (NFPA). Where
applicable, follow the Canadian Electric Code.
1. The rotation of the wheel is critical. It must be
free to rotate without striking or rubbing any
stationary objects.
2. Motor must be securely and adequately
grounded.
3. Do not spin fan wheel faster than maximum
cataloged fan RPM. Adjustment to fan speed
significantly affects motor load. If fan RPM is
changed, motor current should be checked
to make sure it is not exceeding the motor
nameplate amps.
4. Do not allow the power cable to kink or come
in contact with oil, grease, hot surfaces,
or chemicals. Replace cord immediately if
damaged.
5. Verify that the power source is compatible with
the equipment.
6. Never open access doors to a duct while the fan
is running.