Honeywell DG115EZIAQ - TrueIAQ Digital IAQ Control User manual

Owner’s Guide
TrueIAQ®
Digital IAQ Control
69-2072-09

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
Read and save these instructions.
Need Help?
For assistance with this product please visit http://yourhome.honeywell.com
or call Honeywell Customer Care toll-free at 1-800-468-1502
Table of contents
® U.S. Registered Trademark. Patents pending. Part number DG115EZIAQ.
Copyright © 2011 Honeywell International Inc. All rights reserved.

1 69-2072—09
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®

69-2072—09 2
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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M24932
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.

69-2072—09 4
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
%
35
M24831
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).

5 69-2072—09
2. Press “More” to enter Window Frost Protection. Use the UP/DOWN
arrows to set frost protection level.
Changing humidifier settings
M24830
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
7
M24832
Humidify
Auto Off
M24833

69-2072—09 6
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
%
60
M24834
DeHumidify
Auto Off
M24835
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
M24836
Ventilate
Auto On Off
M24837

7 69-2072—09
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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M24934
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M24935
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.
M24787
ELECTRONICAIRCLEANER

9 69-2072—09
Installation
3. Loosen the cover screw.
4. Separate the front housing from the base.
M24814
5. For wall mounting, run wires through
the back hole to the terminals. Wire
size for all connectors:
2 x 18 AWG to 1 X 22 AWG.
Install the mounting plate using two
screws.
M24818
6. For duct mounting, (A) snap out side wall clip and attach
as shown. Run wires through the side wall hole, under
the clip, to the terminals. (B) Snap in sensor cap.
7. Reinstall the front housing on the power base, and
secure with screw.
Note: If duct mounted, ensure sensor cap tip aligns with
air flow in duct.
8. Apply power to the system.
M24854
A
B

69-2072—09 10
Pin Pin description Pin capacity
R24V supply. Must be common to G output. 24Vac±20% 1.5
amp max
C24V supply common. 24Vac±20%
Sensor Communication and supply bus to remote
sensors (sensor pins not polarized).
24Vdc 64mA max
out
Sensor
Switch Override switch input. Active when R is
applied
24Vac±20%,
10mA max in
WW input to sense when the thermostat is
calling for heat. Active when R is applied.
24Vac±20%,
10mA max in
GG input to sense fan calls. Active when R is
applied. Fan output to activate system fan.
R8222 Isolation Relay may be required if G
is not isolated through the thermostat.
24Vac±20%,
10mA max in
24Vac from R,
1Amp max out
Vent 1 Dry contact output. Opens the vent
damper of an HRV or the bathroom fan
and Damper.
24Vac from R,
1Amp max out
Vent 2
Dehum 1 Dry contact output. Starts the
Dehumidifier or an alternate fan speed.
24Vac from R,
1Amp max out
Dehum 2
Hum 1 Dry contact output. Starts the Humidifier. 24Vac from R,
1Amp max out
Hum 2
Wiring
M24819

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Wiring
Wiring TrueIAQ®with a non-powered humidifier.
HVAC
M32534
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R
C
W
Y
G
R
C
SENSOR
SENSOR
SWITCH
W
G
VENT
VENT
DEHUM
DEHUM
HUM
HUM
24V
TRANSFORMER
HE100, HE200
BYPASS
HUMIDIFIER
TrueIAQ
+
–
OUTDOOR
SENSOR
THERMOSTAT

69-2072—09 12
Wiring
Wiring TrueIAQ®with a powered humidifier.
HVAC
THERMOSTAT
M32535
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R
C
W
Y
G
R
C
SENSOR
SENSOR
SWITCH
W
G
VENT
VENT
DEHUM
DEHUM
HUM
HUM
HE150, HE250,
HE300, BYPASS
HUMIDIFIER
TrueIAQ
OUTDOOR
SENSOR
HUM
HUM

13 69-2072—09
About your new thermostatWiring
Wiring TrueIAQ®with
TrueSTEAM.
THERMOSTAT
HUM
HUM
R
C
GYWRRc
GYWRC
24V
24V
HUM
HUM
C
GT
R
RT
GF
EXT
RECOMMENDED
PRESSURE
SWITCH
SENSOR
SENSOR
HVAC
M29761
TrueSTEAM - INTERNAL
NOTE: IF PRESSURE SWITCH IS USED, ENSURE DIP 5 IS IN ON POSITION.
FACTORY
INSTALLED
JUMPER
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TrueIAQ
OUTDOOR SENSOR

69-2072—09 14
About your new thermostatWiring
M27390
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R
C
SENSOR
SENSOR
SWITCH
W
G
VENT
VENT
DEHUM
DEHUM
HUM
HUM
TrueIAQ
EARD-6
TH8110U
YWRRc
OUTDOOR
SENSOR
(PROVIDED)
HVAC
R
C
W
Y
G
CG
DH90 DEHUMIDIFIER
GRAY DAMPER CONTROL
(NOT USED)
RED +24VAC POWER
YELLOW
COMPRESSOR
CONTROL COMM.
BLUE FAN AND
COMPRESSOR CONTROL
GREEN FAN ONLY
CONTROL
1
IF A THERMOSTAT OTHER THAN A TH5110, TH5220, TH5320, TH6110,
TH6220, TH6320, TH8110, TH8320 OR TH8321 IS USED, A RELAY MAY BE
REQUIRED TO ISOLATE THE G WIRE.
1
Wiring TrueIAQ®with a
dehumidifier and ventilation
damper.

15 69-2072—09
About your new thermostatWiring
Wiring TrueIAQ®with a
humidifier and HRV/ERV
ventilator.
M32536
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R
C
SENSOR
SENSOR
SWITCH
W
G
VENT
VENT
DEHUM
DEHUM
HUM
HUM
TrueIAQ
TH8110U
YWRRc
OUTDOOR
SENSOR
(PROVIDED)
HVAC
R
C
W
Y
G
CG
RED
BLACK
GREEN
2
IF A THERMOSTAT OTHER THAN A TH5110, TH5220, TH5320, TH6110, TH6220,
TH6320, TH8110, TH8320 OR TH8321 IS USED, A RELAY MAY BE REQUIRED TO
ISOLATE THE G WIRE.
FOR WIRING OF HUMIDIFIER OTHER THAN THE HE100 OR HE200 READ THE
INSTALLATION INSTRUCTIONS.
1
2
HE100
HE200
RC
L1 L2
24 VOLT/40VA
TRANSFORMER
ERV/HRV
1

69-2072—09 16
About your new thermostatWiring
Wiring TrueIAQ®with a non-
powered humidifier, ventila-
tion damper, and an auxiliary
exhaust fan.
2
IF A THERMOSTAT OTHER THAN A TH5110, TH5220, TH5320, TH6110, TH6220, TH6320, TH8110, TH8320
OR TH8321 IS USED, A RELAY MAY BE REQUIRED TO ISOLATE THE G WIRE.
FOR WIRING OF HUMIDIFIER OTHER THAN THE HE100 OR HE200 READ THE INSTALLATION
INSTRUCTIONS.
IF A RELAY OTHER THAN THE R8239 IS USED, A DEDICATED TRANSFORMER WITH AT LEAST 40 VA IS
REQURED TO POWER THE HE265 AND EARD. IF AN R8239 IS USED (AS SHOWN IN THIS DIAGRAM) NO
ADDITIONAL TRANSFORMER IS REQURED.
1
M32537
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R
C
SENSOR
SENSOR
SWITCH
W
G
VENT
VENT
DEHUM
DEHUM
HUM
HUM
TrueIAQ
EARD-6
TH8110U
YWRRc
OUTDOOR
SENSOR
(PROVIDED)
HVAC
R
C
W
Y
G
CG
1
2
HE100
HE200
RW
CY
GYELLOW
BLACK
BLACK
WHITE
120 VOLT POWER
L1
L2
R8239 FAN CENTER RELAY
EXHAUST FAN
3
3

17 69-2072—09
Mounting the outdoor sensor
1. Do not mount on the south side of the house or in direct exposure to sunlight.
2. Keep at least 4 feet away from exhaust
vents.
3. If in an air intake, place 1 foot closer to
outside wall.
4. Place at least 6 inches higher than
possible snow buildup.
5. Do not route sensor wire near high
voltage wires.
Note: The sensor can be extended using
18-gauge wire.
M24821
M24822

69-2072—09 18
Advanced HVAC installer setup instructions
1. Press and hold the UP/
DOWN arrows for 3 seconds.
M24823
2. Press “More” to advance to the
next setup option. See table on
next page.
3. Use the UP/DOWN arrows to
select options. See table on next
page.
4. Press “Done” at any time to save and
return to the home screen.
M24825
M24824