Honeywell DG115EZIAQ - TrueIAQ Digital IAQ Control User manual

Owner’s Guide
TrueIAQ®
Digital IAQ Control
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User Information
About TrueIAQ®.............................. 1
Operation .................................... 2
Display screen reference ........... 3
Adjusting IAQ settings
Changing humidifier settings..... 4
Changing dehumidifier settings... 6
Changing ventilation settings ...... 6
Changing time of day................. 7
Service timers............................. 7
Installer Information
Installation .................................. 8
Wiring........................................ 10
Mounting the outdoor sensor..... 17
Advanced programming .......... 18
Appendices
Standards ................................. 22
Warranty information................ 23
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Table of contents
® U.S. Registered Trademark. Patents pending. Part number DG115EZIAQ.
Copyright © 2011 Honeywell International Inc. All rights reserved.

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The TrueIAQ®monitors and automatically adjusts operation of your whole-house humid-
ifier, dehumidifier, ventilator, or bath fan.
Maintaining proper indoor humidity minimizes the potential for unhealthy airborne pol-
lutants to grow. Having too little humidity can leave you vulnerable to infections and
uncomfortable dry skin. Too much humidity creates ideal breeding grounds for mold,
mildew and dust mites. Humidified air also feels warmer in the winter, and dry air feels
cooler in the summer.
TrueIAQ can adjust humidity with or without dependency on HVAC equipment opera-
tion. If you have both a humidifier and dehumidifier installed, the TrueIAQ can automati-
cally change over to the appropriate equipment based on your comfort settings and the
changing outdoor conditions.
TrueIAQ can also deliver fresh air with or without dependency on HVAC equipment
operation. Today’s building codes require homes to be built more tightly for energy effi-
ciency, but that tightness can also trap indoor air pollutants, such as cooking odors,
cleaning agents, radon, and carbon dioxide/monoxide. TrueIAQ provides cost-effective
ventilation in accordance to industry standards. In addition, the TrueIAQ can be pro-
grammed to deliver ventilation during set times of the day or night.
About TrueIAQ®

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TrueIAQ®can be used to control the humidity levels in your home, and control fresh air
intake in accordance to industry recommendations (ASHRAE 62.2-2010).
Operation
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Comfort Settings: Feedback
on your indoor IAQ conditions.
Outdoor Conditions1: Actual
outdoor temperature and
humidity.
Equipment Operation:
Displays what equipment is
operating at a given time.
1 Actual outdoor temperature and humidity will only be displayed if the outdoor sensor is installed.
Maintenance Reminders:
Notifies you when your equip-
ment needs service.
Programmable Clock:
Displays time and allows
IAQ equipment programming
based on time.
More: Advances between
installed IAQ equipment control
options.
Done: Saves changes.
Toggle Arrows: Changes the
comfort levels of your IAQ
equipment operation.
Indoor Conditions: Actual
indoor temperature and
humidity.

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Dry: Indoor humidity levels
are below 20% relative
humidity (RH.)
Display screen reference
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Wet: Indoor
humidity levels are
above 60% RH.
Window Frost: The control is
protecting your home against too
much humidity based on outdoor
conditions. Humidity levels in your
home may not reach your desired
RH% setting as a result.
Indoor temperature
and humidity.
Outdoor temperature
and humidity.
De Humidify: If “Humidify” is dis-
played, the control is calling for
more humidity. If “DeHumidify” is
displayed, the control is calling for
humidity removal.
Ventilate: Fresh air ventilation
is on.
Service Reminders: All are timer-based
and will be displayed to indicate what
service is needed.

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Outdoor Temp. Setting
-20°F (-29°C) 15%
0°F (-18°C) 25%
20°F (-7°C) 35%
Changing humidifier settings
Note: These items will appear only if a humidifier is installed on your system.
1. Set humidifier by pressing UP/DOWN arrows.
Tables below are recommended initial humidity settings based on
outdoor temperature. If window frost setting (see next page) is not
being used, the humidity setting should be adjusted manually when
outdoor conditions change.
Set
Humidify
%
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Red font is
blinking on
screen.
If both humidifier (hum) and dehumidifier (dehum) are installed:
Dehum setpoint can only be equal to or higher than Hum setpoint. If equal, equipment
changeover will be at least 5% higher (dehum) or lower (hum).
If not equal, changeover occurs at setpoint plus 2% RH (control’s deadband).

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2. Press “More” to enter Window Frost Protection. Use the UP/DOWN
arrows to set frost protection level.
Changing humidifier settings
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123456789
LESS HUMIDITY
LOOSE HOME/SINGLE-PANE WINDOWS
MORE HUMIDIT
Y
TIGHT HOME/TRIPLE-PANE WINDOWS
On the first cold day after TrueIAQ®is installed, look for condensation
on windows. If present, lower Frost Protection by one. Once set for your
home, Frost Protection does not need to be changed again.
3. Press “More” again to enter operation style. Press the UP/DOWN
arrows to set.
• “Auto”runshumidifierautomaticallyaccordingtosettings.
• “Off”turnsthehumidifieroff.
4. Press “Done” to save settings, or “More” to enter dehumidifier
settings.
Humidify
Window Frost
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Humidify
Auto Off
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Note: These items will appear only if a dehumidifier is installed. If both a humidifier
and dehumidifier are installed, these settings will appear after pushing “More” from the
humidifier operation style screen.
Changing dehumidifier and ventilation settings
1. Set dehumidifier by pressing the UP/DOWN arrows. RH% will change
in increments of five.
2. Press “More” to enter operation style. Press the UP/DOWN arrows to
set.
• “Auto”runsdehumidifierautomaticallyaccordingtoyourRH%
settings.
• “Off”turnsthedehumidifieroff.
3. Press “Done” to save settings, or “More” to enter ventilation settings.
Set
DeHumidify
%
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DeHumidify
Auto Off
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Note: These items will appear only if a ventilator is installed.
1. Use the UP/DOWN arrows to run ventilation temporarily. Range is
from 20 to 480 minutes, in 20-minute increments.
2. Press “More” again to enter operation style.
• “Auto”runsventilationaccordingtoinstallersettings.
• “ON”runsventilationcontinuously.
• “OFF”turnsventilationoff.Inthismode,ventilationwillonly
run if turned on by a remote switch.
3. Press “Done” to save settings, or “More” to enter time settings.
Ventilate
Time On
2000
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Ventilate
Auto On Off
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1. Press “More.” Adjust hour using the the UP/DOWN
arrows.
2. Press “More.” Adjust minutes using the UP/DOWN
arrows.
3. Press “Done” to save settings.
Changing time of day and service timers
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Service Timers
Service timers appear when the humidifier, dehumidifier,
ventilator, air filter, and/or UV bulbs need service. Your HVAC
technician will set these timers during installation.
Resetting Service Timers
Press and hold the DOWN arrow for 5 seconds to reset your
service timers.
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Installation
1. Turn system power off.
2. Choose a location. TrueIAQ®can be mounted to a wall or directly to the return duct.
CAUTION: ELECTRICAL HAZARD. Can cause electrical shock or
equipment damage. Disconnect power before beginning installation.
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ELECTRONICAIRCLEANER