Greenheck Vari-Green Air Quality VOC User manual

PN 475407
Vari-Green® Control
Indoor Air Quality–VOC
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!
The Air Quality Controller – VOC is specically
designed to control a fan with a Vari-Green® motor.
The controller senses the level of Volatile Organic
Compounds (VOCs) in the space and automatically
adjusts the ventilation rate to the space by
increasing or decreasing the speed of the supply or
exhaust fan based on the level of VOCs.
Applications for this controller include bathrooms,
conference rooms, cafeterias, or any other space
where air quality is of concern. Ventilating based
on the VOC concentration assures that the space
will not be over or under ventilated while using the
Vari-Green motor technology to operate quietly and
efciently.
The VOC controller has adjustments for air quality
setpoint, and minimum and maximum fan speed.
The fan speed and VOC level are available as
analog outputs to be read by a building automation
system or a secondary device.
DANGER
Always disconnect, lock and tag power source before
installing or servicing. Failure to disconnect power
source can result in re, 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.
Only qualied 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.
Indoor Air Quality – VOC
(Volatile Organic Compounds)
General Safety Information

2
Receiving
Upon receiving the product check to make sure all
items are accounted for by referencing the bill of
lading to ensure all items were received. Inspect
each crate for shipping damage before accepting
delivery. Notify the carrier if any damage is noticed.
The carrier will make notication on the delivery
receipt acknowledging any damage to the product.
All damage should be noted on all the copies of the
bill of lading which is countersigned by the delivering
carrier. A Carrier Inspection Report should be lled
out by the carrier upon arrival and reported to the
Trafc Department. If damaged upon arrival, le
a claim with carrier. Any physical damage to the
unit after acceptance is not the responsibility of
Greenheck Fan Corporation.
Unpacking
Verify that all required parts and the correct quantity
of each item have been received. If any items are
missing, report shortages to your local representative
to arrange for obtaining missing parts. Sometimes it
is not possible that all items for the unit be shipped
together due to availability of transportation and truck
space. Conrmation of shipment(s) must be limited to
only items on the bill of lading.
Electrical
The motor amperage and voltage ratings must be
checked for compatibility to supply voltage prior
to nal electrical connection. Wiring must conform
to local and national codes. Consult local code
authorities for specic requirements.
Storage
Product is protected against damage during
shipment. If the product cannot be installed and
operated immediately, precautions need to be
taken to prevent deterioration of the product during
storage. The user assumes responsibility of the
product and accessories while in storage. The
manufacturer will not be responsible for damage
during storage. These suggestions are provided
solely as a convenience to the user.
Indoor Only
Do not store this product outdoors. The ideal
environment for the storage of this product is
indoors, above grade, in a low humidity atmosphere
which is sealed to prevent the entry of blowing
dust, rain or snow. Temperatures should be evenly
maintained between 30° to 110°F (-1° to 43°C) (wide
temperature swings may cause condensation and
“sweating” of metal parts). All accessories must be
stored indoors in a clean, dry atmosphere.
Remove any accumulations of dirt, water, ice, or
snow and wipe dry before moving to indoor storage.
Allow cold parts to reach room temperature to avoid
“sweating” of metal parts. To dry parts and packages,
use a portable electric heater to get rid of any moisture
buildup. Leave coverings loose to permit air circulation
and to allow for periodic inspection. The unit should
not be stored on the oor.
Inspection and Maintenance
During Storage
While in storage, inspect product once per month.
Keep a record of inspection and maintenance
performed. If moisture or dirt accumulations are found
on parts, the source should be located and eliminated.
Installation and Setup Guide
This guide provides instructions for how to
install, wire and program the control system for
use when constant pressure in a duct or room
system is required. This does not cover ductwork
recommendations or other considerations.
Electrical Safety Information
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
signicantly 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.

3
Mounting
Mount the controller in the space to be controlled.
Keep wire lengths between the controller and the fan
to 200 feet or less.
1. Separate the unit from the back plate by driving
in the Allen screw until the two pieces come free.
2. Pull the wire through the wall and out of the
junction box, leaving about six inches free.
3. Pull the wire through the hole in the base plate.
4. Secure the plate to the box using the #6-32 x 5/8
inch mounting screws provided.
5. Terminate the unit wiring.
6. Mold the foam on the unit’s base to the wire
bundle to prevent drafts. (see note below)
7. Attach Cover by latching it to the top of the base,
rotating the cover down and snapping it into place.
8. Secure the cover by backing out the lock-down
screw using a 1/16 inch Allen wrench until it is
ush with the bottom of the cover.
1. Separate the unit from the back plate by driving
in the Allen screw until the two pieces come free.
2. Place the base plate against the wall where you
want to mount the sensor.
3. Using a pencil mark out the two mounting holes
and the area where the wires will come through
the wall.
4. Drill two 3/16 inch holes in the center of each
marked mounting hole, DO NOT punch the
holes or the drywall anchors will not hold. Insert
a drywall anchor into each hole.
5. Drill one 1/2 inch hole in the middle of the
marked wiring area.
6. Pull the wire through the wall and out of the 1/2
Inch hole, leaving about six inches free.
7. Pull the wire through the hole in the base plate.
8. Secure the base to the drywall anchors using the
#6 x 1 inch mounting screws provided.
9. Terminate the unit wiring.
10. Mold the foam on the unit’s base to the wire
bundle to prevent drafts. (see note below)
11. Attach cover by latching it to the top of the base,
rotating the cover down and snapping it into place.
12. Secure the cover by backing out the lock-down
screw using a 1/16 inch Allen wrench until it is
ush with the bottom of the cover.
NOTE: In any wall-mount application, the air
within the wall cavity can cause erroneous
readings. The mixing of room air and air from
within the wall cavity can lead to condensation,
erroneous readings and sensor failure.
To prevent these conditions, Greenheck
recommends sealing the conduit leading to
the junction box, lling the junction box with
berglass insulation or sealing the wall cavity.
Electrical Box
Mounting Plate
Cover
Junction Box Mounting
Mounting Plate
Cover
Drywall Mounting

4
Display
On the front of the controller is a two-line display.
The Minor Display describes the units or variable
that is being displayed. The Main Display shows the
numeric value. The Fan Icon is illuminated whenever
the Fan Speed Output voltage is at or above the
Output Minimum (as specied in parameter P7).
The dot in the lower left is used to signal Fan Cutout
Mode.
Normal Operation (J19 = RUN)
The Air Quality Controller ships from the factory set
to control VOCs to 40% contamination – the display
indicates the measured VOC Level (%VOC), the
Fan Speed Output spans 2 to 10 Volts and the Fan
Cutout Mode is disabled.
Scroll Button and Display Mode
The controller ships from the factory with the display
set to indicate the measured VOC Level (%VOC).
Pressing the scroll button at any time switches the
display to the Air Quality Setpoint (%SET). A second
push of the scroll button switches the display to the
Fan Speed in percent (%SPD), and a third push
returns the display to the VOC Level (%VOC).
Minor Display
0.34 inch 3-digit
Alpha-Numeric
Main Display
0.76 inch 4-digit
Numeric
Dot for Cutout Mode
Controller
Terminal
Transformer
Control Terminal
J15-FAN 0 to 10V
J15-GND COM
J15-24V 24V
Wiring
All wiring for the Greenheck Air Quality Controller is
Class II low-voltage control wiring. See the Wiring
Diagram on Page 7 for the wiring overview.
Optional Remote Override
To add a Remote Override, connect a normally-open
switch between terminals J17-OVR and J15-GND
on the controller. (See Wiring Diagram on pg. 7.)
Closing this switch will activate the Remote Override
feature. Opening the switch will deactivate the
override.
Optional VOC Level Output
Reference
The VOC level is available an output signal of 0 to
10VDC from J15-VOC to J15-GND. (See Wiring
Diagram on pg. 7.) The signal is the 0 to 100% VOC
level.
Control box to factory mounted
transformer control input.
J15
Scroll
Button
Programming
Jumper in
RUN Mode
Fan Icon

5
Programming (J19 = PRG)
The unit ships with factory default parameter
setpoints. Parameter setpoints may be edited in
the eld by an HVAC technician. During parameter
editing, the output voltage is set to zero.
General Programming
• Enter the edit mode by removing the unit from its
base and placing jumper J19 on the PRG pins.
The minor display will show the parameter name
and the major display will show the parameter
number.
• Press the UP or DN programming switch to select
the parameter you wish to edit.
• Press the ENT program switch to select the
parameter and enter the parameter edit mode.
The minor display shall show the parameter
name and the major display shall show the
parameter value.
• Press the UP or DN programming switch to
change the parameter value.
• Press the ENT program switch to store the
parameter value and return to the parameter
selection mode.
• Return to normal operation by placing the J19
jumper on a single pin.
Parameter
Display Description Default Setting
Air Quality
Setpoint 40%
Factory
Defaults
0
(See Below)
Display Units
2
Air Quality in %
VOCs
Fan Cutout
Enable
0
Fan Cutout
Disabled
Fan Cutout
Timer 30 Seconds
Output
Override
Percent
100%
Output State 1
Automatic
Output
Minimum 20%
Output
Maximum 100%
Parameter Descriptions
Air Quality Setpoint, Parameter P0
Factory Default = 40% VOC Level
Adjustable from 27 to 100% VOC Level in
increments of 1%
Factory Defaults, Parameter P1
Factory Default = 0
0 = Entry Condition
1 = Set all parameters to the factory default setting
Display Units, Parameter P2
Factory Default = 2
0 – Display OFF
1 – Fan Speed Output in Percent
2 – Air Quality in % VOCs (Factory Default)
Note: If P2 is set to zero, the Dot and Fan Icon will
still display normally, but the main and minor display
will be off. If a Remote Override is used and the
override switch is closed, the main and minor display
will become active for as long as the contacts are
closed. Pushing the scroll button will activate the
main and minor for a few seconds.
Programming
Switches
Programming
Jumper in
PRG Mode

6
Fan Cutout, Parameter P3
Factory Default = 0
0 – Fan Cutout Disabled
1 – Fan Cutout Enabled
The Fan Cutout is designed to shut off the exhaust
fan when the VOC level falls below the Air Quality
Setpoint.
With the Fan Cutout Enabled, when the %VOC
measurement is 2% below the Air Quality Setpoint
(as set by Parameter P0), the Fan Cutout timer is
activated and the dot on the display will ash. After
the Cutout Time has elapsed (as set by Parameter
P4), the Fan Speed Output on the controller will go
to 0 Volts, shutting off the exhaust fan. The Fan Icon
on the display will extinguish and the Dot will be on
steady.
When the %VOC measurement rises 5% above the
Air Quality Setpoint, the controller leaves Fan Cutout
mode and returns to normal operation. The Dot will
extinguish and the Fan Icon will turn on.
Fan Cutout Timer, Parameter P4
Factory Default = 30 Seconds
0 to 300 seconds in 1 second increments
See Parameter P3 for operational details
Output Override Percent, Parameter P5
Factory Default = 100%
20% to 100% in 1% increments
During normal operation, when the remote override
switch is closed, the Fan Speed Output on the
controller will immediately ramp to the P5 Output
Override Percent and stay there until the remote
override switch is opened. The remote override
can be activated by any normally-open voltage-free
contact. (See Wiring Diagram on pg. 7.) Closing the
contact will activate the override.
When the override is activated, the Fan Icon on the
display will turn on and the
minor display will show %OVR
and the main display will show
the Fan Speed Output percent
value.
Output State, Parameter P6
Factory Default = 1
0 – Manual Control
1 – Normal Operation
The Output State allows manual control of the Fan
Speed for system setup and commissioning tests.
Exiting this parameter returns the controller to
normal operation.
When entering this parameter, the value will be 1
(normal operation). Press the Down program switch
to set the parameter value to 0 and then press the
Enter program switch. The unit is now in Manual
Control.
The major display will read 50 for
50% output (5 VDC output). The
minor display will show %SPD.
Pressing the Up program switch
increases the displayed value
and proportionally increases the
Fan Speed Output from the controller. Pressing the
Down program switch decreases the displayed value
and proportionally decreases the Fan Speed Output.
The Fan Speed can be set to any value from 20% to
100% (for 2 to 10 VDC Fan Speed Output) or it can
be set to 0 for 0 VDC Fan Speed Output.
The Fan Speed will remain at the displayed value
until the Output State Parameter is returned to
Normal Operation mode.
Output Minimum, Parameter P7
Factory Default = 20%
20 to 100% in 1% increments
Sets the controller’s minimum Fan Speed Output
level.
Note: the controller will not allow the output minimum
to be set higher than the output maximum.
Output Maximum, Parameter P8
Factory Default = 100%
20 to 100% in 1% increments
Sets the controller’s maximum Fan Speed Output
level.
Note: the controller will not allow the output
maximum to be set lower than the output minimum.

7
Wiring Diagram
Problem
Fan always at minimum speed 
Place an opened permanent or white board marker underneath the controller. The
fan should increase speed within a few minutes.

Check that the air quality measurement is decreasing. If there is a large
contamination it may take a while to exhaust the VOCs.

Setpoint may be too low for persistent background VOCs.

Check the space for a spill.

Setpoint may be too low for persistent background VOCs.

If the controller will not turn the fan off, verify that the measured %VOC is at least
2% below set point. Verify that the cutout timer has started by looking for the
flashing dot.

If the controller will not restart the fan, verify that the measured %VOC is at least
5% above the setpoint.
Fan always at high speed
Fan Cutout not working properly
Potential Solution
Troubleshooting

8
AMCA Publication 410-96, Safety Practices for Users and
Installers of Industrial and Commercial Fans, provides ad-
ditional safety information. This publication can be obtained
from AMCA International, Inc. at: www.amca.org.
Greenheck Vari-Green® Motor catalog provides additional
information describing the equipment, fan performance,
available accessories, and specication data.
Phone: [phone] • Fax: [phone] • E-mail: [email protected] • Web site: www.greenheck.com
Greenheck warrants this equipment to be free from defects in material and workmanship for a period of
one year from the shipment date. Any units or parts which prove defective during the warranty period will
be replaced at our option when returned to our factory, transportation prepaid. Motors are warranted by
the motor manufacturer for a period of one year. Should motors furnished by Greenheck prove defective
during this period, they should be returned to the nearest authorized motor service station. Greenheck
will not be responsible for any removal or installation costs.
As a result of our commitment to continuous improvement, Greenheck reserves the right to change
specications without notice.
Warranty
475407 • Indoor Air Quality - VOC, Rev. 1, March. 2012 Copyright 2012 © Greenheck Fan Corporation