Honeywell TrueIAQ User Manual

Owner’s Guide

TrueIAQ

Digital IAQ Control

®

69-2072-09

Table of contents

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

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

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.

® U.S. Re gistered Trademark. Pa tents pendi ng. Part nu mber DG115EZIAQ.

Copyr ight © 2011 Honey well Intern ational In c. All right s reserve d.

About TrueIAQ

The TrueIAQ® monitors and automatically adjusts operation of your whole-house humid­ifier, dehumidifier, ventilator, or bath fan.

Maintaining proper indoor humidity minimizes the potential for unhealthy airborne pol­lutants 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 opera­tion. If you have both a humidifier and dehumidifier installed, the TrueIAQ can automati­cally 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 effi­ciency, 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 pro­grammed to deliver ventilation during set times of the day or night.

1 69-2072—09

®

Operation

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).

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.

More: Advances between
installed IAQ equipment control
options.

1

Actual outdoor temperature and humidity will only be displayed if the outdoor sensor is installed.

69-2072—09 2

68

76

PM

12 15

In

%

40

Out

%

55

:

Indoor Conditions: Actual
indoor temperature and
humidity.

Programmable Clock:
Displays time and allows
IAQ equipment programming
based on time.

Maintenance Reminders:
Notifies you when your equip­ment needs service.

Done: Saves changes.

Toggle Arrows: Changes the

comfort levels of your IAQ
equipment operation.

M24931

Display screen reference

Wet: Indoor

humidity levels are

Dry: Indoor humidity levels
are below 20% relative
humidity (RH.)

De Humidify: If “Humidify” is dis­played, the control is calling for
more humidity. If “DeHumidify” is
displayed, the control is calling for
humidity removal.

3 69-2072—09

above 60% RH.

40

68

76

55

PM

:

12 15

Service Reminders: All are timer-based
and will be displayed to indicate what
service is needed.

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.

In

%

Indoor temperature

Out

and humidity.

%

Outdoor temperature
and humidity.

Ventilate: Fresh air ventilation

is on.

M24932

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.

Outdoor Temp. Setting

-20°F (-29°C) 15%

35

Humidify

Set

M24831

Red font is
blinking on
screen.

0°F (-18°C) 25%

20°F (-7°C) 35%

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).

69-2072—09 4

%

Changing humidifier settings

LESS HUMIDITY

MORE HUMIDIT

Y

M24832

2. Press “More” to enter Window Frost Protection. Use the UP/DOWN
arrows to set frost protection level.

Window Frost

LOOSE HOME/SINGLE-PANE WINDOWS

123456789

TIGHT HOME/TRIPLE-PANE WINDOWS

M24830

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.

5 69-2072—09

7

Humidify

Auto Off

Humidify

M24833

Changing dehumidifier and ventilation settings

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.

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.

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.

69-2072—09 6

60

DeHumidify

Set

Auto Off

DeHumidify

Time On

2000

Auto On Off

M24834

M24835

Ventilate

M24836

Ventilate

M24837

%

Changing time of day and service timers

68

40
55

:

76

%

%

In

Out

68

40
55

12 00

:

76

%

%

In

Out

68

40
55

12 15

:

76

%

%

In

Out

PM

12 00

Set

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.

M24934

Set

M24935

M24933

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.

7 69-2072—09

Installation

CAUTION : ELECTRICAL HAZARD. Can cause electrical shock or

equipment damage. Disconnect power before beginning installation.

1. Turn system power off.

2. Choose a location. TrueIAQ® can be mounted to a wall or directly to the return duct.

E
L
E
C
T
R

O
N
I
C
A
I

R
C
L
E
A
N

E
R

M24787

69-2072—09 8

Installation

3. Loosen the cover screw.

4. Separate the front housing from the base.

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.

A

B

9 69-2072—09

M24814

M24854

Wiring

Pin Pin description Pin capacity

R 24V supply. Must be common to G output. 24Vac±20% 1.5

C 24V supply common. 24Vac±20%
Sensor Communication and supply bus to remote
Sensor
Switch Override switch input. Active when R is

W W input to sense when the thermostat is

G G input to sense fan calls. Active when R is

Vent 1 Dry contact output. Opens the vent
Vent 2

Dehum 1 Dry contact output. Starts the
Dehum 2
Hum 1 Dry contact output. Starts the Humidifier. 24Vac from R,
Hum 2

M24819

69-2072—09 10

sensors (sensor pins not polarized).

applied

calling for heat. Active when R is applied.

applied. Fan output to activate system fan.
R8222 Isolation Relay may be required if G
is not isolated through the thermostat.

damper of an HRV or the bathroom fan
and Damper.

Dehumidifier or an alternate fan speed.

amp max

24Vdc 64mA max
out

24Vac±20%,
10mA max in
24Vac±20%,
10mA max in
24Vac±20%,
10mA max in

24Vac from R,
1Amp max out
24Vac from R,
1Amp max out

24Vac from R,
1Amp max out

1Amp max out

Wiring

OUTDOOR

Wiring TrueIAQ® with a non-powered humidifier.

SENSOR

TrueIAQ

68
76

PM

:

1215

R

HVAC

C

SENSOR

SENSOR

In

SWITCH

%

40

Out

%

55

W

G

R

C

W

Y

G

THERMOSTAT

VENT

VENT

+

24V

TRANSFORMER

–

HE100, HE200

BYPASS

HUMIDIFIER

DEHUM

DEHUM

HUM

HUM

M32534

11 69-2072—09

Wiring

OUTDOOR

Wiring TrueIAQ® with a powered humidifier.

SENSOR

R

C

SENSOR

In

SWITCH

%

40

68

Out

%

76

55

PM

:

1215

W

G

SENSOR

TrueIAQ

VENT

VENT

DEHUM

DEHUM

HUM

HUM

69-2072—09 12

R

C

W

Y

G

HVAC

THERMOSTAT

HE150, HE250,
HE300, BYPASS

HUMIDIFIER

HUM

HUM

M32535

About your new thermostatWiring

OUTDOOR SENSOR

Wiring TrueIAQ® with
TrueSTEAM.

HVAC

GYWRC

GYWRRc

THERMOSTAT

NOTE: IF PRESSURE SWITCH IS USED, ENSURE DIP 5 IS IN ON POSITION.

13 69-2072—09

TrueIAQ

SENSOR

In

%

40

68

SENSOR

Out

%

76

55

PM

:

1215

RECOMMENDED

PRESSURE

SWITCH

FACTORY

INSTALLED

JUMPER

HUM

HUM

R

C

24V

24V

HUM

HUM

C

GT

R

RT

GF

EXT

TrueSTEAM - INTERNAL

M29761

About your new thermostatWiring

TH8110U

Wiring TrueIAQ® with a
dehumidifier and ventilation
damper.

69-2072—09 14

TrueIAQ

In

%

40

68

Out

%

SENSOR

76

55

PM

:

1215

SENSOR

SWITCH

IF A THERMOSTAT OTHER THAN A TH5110, TH5220, TH5320, TH6110,

1

TH6220, TH6320, TH8110, TH8320 OR TH8321 IS USED, A RELAY MAY BE
REQUIRED TO ISOLATE THE G WIRE.

VENT

VENT
DEHUM
DEHUM

HUM
HUM

1

R
C

OUTDOOR

(PROVIDED)

W

G

CG

SENSOR

YWRRc

R

C

W

HVAC
Y

G

EARD-6

DH90 DEHUMIDIFIER

GRAY DAMPER CONTROL
(NOT USED)

RED +24VAC POWER
YELLOW

COMPRESSOR
CONTROL COMM.

BLUE FAN AND
COMPRESSOR CONTROL

GREEN FAN ONLY
CONTROL

M27390

About your new thermostatWiring

TH8110U

Wiring TrueIAQ® with a
humidifier and HRV/ERV
ventilator.

TrueIAQ

In

%

40

68

Out

%

76

55

PM

:

1215

IF A THERMOSTAT OTHER THAN A TH5110, TH5220, TH5320, TH6110, TH6220,

1

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

2

INSTALLATION INSTRUCTIONS.

SENSOR
SENSOR

SWITCH

VENT

VENT
DEHUM
DEHUM

HUM
HUM

1

R
C

OUTDOOR

SENSOR

(PROVIDED)

W

G

R

L1

15 69-2072—09

YWRRc

CG

HE100
HE200

C

24 VOLT/40VA
TRANSFORMER

L2

R
C
W

HVAC
Y
G

ERV/HRV

RED

BLACK
GREEN

2

M32536

About your new thermostatWiring

TH8110U

Wiring TrueIAQ® with a non­powered humidifier, ventila­tion damper, and an auxiliary
exhaust fan.

69-2072—09 16

TrueIAQ

In

%

40

68

Out

%

SENSOR

76

55

PM

:

1215

SENSOR

SWITCH

VENT

VENT
DEHUM
DEHUM

HUM
HUM

L1

120 VOLT POWER

L2

IF A THERMOSTAT OTHER THAN A TH5110, TH5220, TH5320, TH6110, TH6220, TH6320, TH8110, TH8320

1

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

2

INSTRUCTIONS.

3

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.

YWRRc

CG

1

R
C

OUTDOOR

SENSOR

(PROVIDED)

W

G

R

C

W

HVAC
Y

G

EARD-6

HE100

2

HE200

BLACK

WHITE

R8239 FAN CENTER RELAY

W

R

G

3

Y

C

EXHAUST FAN

YELLOW

BLACK

M32537

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

17 69-2072—09

M24822

Advanced HVAC installer setup instructions

M24823

1. Press and hold the UP/
DOWN arrows for 3 seconds.

2. Press “More” to advance to the
next setup option. See table on
next page.

M24824

3. Use the UP/DOWN arrows to
select options. See table on next
page.

69-2072—09 18

4. Press “Done” at any time to save and
return to the home screen.

M24825

About your new thermostatAdvanced programming

To be used by qualified HVAC technician.

Setup functions Settings & Options (factory default in bold)

10 Temperature Display
11 Indoor Temperature Offset Set between -5 and 5 °F (-3 and 3 °C) to recalibrate tem-

12 Outdoor Temperature

Offset

15 Frost Protection 0=Not installed

20 Humidity High Limit
25 Humidifier Operation 0=Hum only while heat on

30 Programmed Humidity
35 Program Start Time

(appears only if ISU30=1)

40 Program End Time

(appears only if ISU30=1)

45 DEHUM Terminal

Equipment Type
50 High Dehum Limit
55 Low Dehum Limit

19 69-2072—09

1=Fahrenheit; 2=Celcius

perature
Set between -5 and 5 °F (-3 and 3 °C) to recalibrate tem­perature

1=Frost Protection OFF

2=Frost Protection ON
5%-80% in 5% increments; 40%

1=Hum only while fan on

0=OFF; 1=ON

15 min increments

11:00 PM

15 min increments

7:00 AM

0=No Dehum (low speed vent)

1=Dehum only
35%-80%, in 5% increments
35%-80% in 5% increments

2=Hum forces fan on
3=Hum operates indepen­dent of fan

Advanced programming

Setup functions Settings & Options (factory default in bold)

60 Dehumidifier Operation 0=Dehum forces fan on

65 Humidity Display Offset

80 Hum Service Timer
85 Hum Service Timer
90 Hum Water Filter Service
95 Air Filter Service Timer
100 Vent Filter Service Timer
105 Vent Service Type

110 UV Bulb Service Reminder
115 Vent Options

120 Vent Operation 0=Vent forces HVAC fan on

125 Programmed Vent

69-2072—09 20

1=Dehum operates independent of fan
Set between -5% to 5% to recalibrate humidity sensing
0=OFF (no offset)
0,1,3,6,12 (months continuous)
0,1,3,6,12 (months intermittent)
0,1,3,6,12 (months intermittent)
0,1,3,6,12 (months continuous)
0,1,3,6,12 (months continuous)
0=Clean ventilation filter

1=Change ventilation filter

0,6,12,24 (months continuous)
0=No vent installed

1=Ventilation using VENT contacts
2=Ventilation using VENT contacts for high speed and
DEHUM contacts for low speed (only if dehum not
installed)
3=Ventilation using VENT contacts and DEHUM contacts
activated together (auxiliary ventilation device such as
exhaust fan)

1=Vent operates independent of HVAC fan
0=OFF; 1=ON

Advanced programming

Setup functions Settings & Options (factory default in bold)

130 Program Start Time

(appears only if ISU125=1)
135 Program End Time

(appears only if ISU125=1)
140 ASHRAE: # of Bedrooms
145 ASHRAE: Home’s Sq Ft
150 ASHRAE: CFM Setting
155 Maximum Vent
160 Vent Shut-offs

165 Dehumidification Via

Fresh Air Ventilator

21 69-2072—09

15 min increments

5:00 PM

15 min increments

9:00 AM
1-6 bedrooms; 2
10=1,000 Sq Ft; up to 50=5,000 Sq Ft
3=30 CFM; 4=40 CFM, up to 20=200 CFM
00; 30%–95%. (00 setting runs to ASHRAE 100%)
0=Auto vent regardless of outdoor conditions

1=Off at 75°F dew point or 99°F air temp
2=Low speed at 65°F dew point or 85°F air temp. Off at
75°F dew point or 99°F air temp

Note: If option 1 or 2 is selected, then ASHRAE 62.2
Standard will not be met.
0=Do not use ventilation for dehum

1=Allow vent for dehum per outdoor conditions.
With dehum installed, control to setpoint. Without
dehum installed, control to the Hum setpoint +10%
(max 60%).

Environmental standards/life expectancy

Tru eI AQ® Contr ol and Outdoor Sensor

• Operating/Storagetemp:-40°Fto

120°F (-40°C to 50°C)

• CondensationProtection:0-100%

• OperatingRH%:0%to99%non-

condensing (TrueIAQ). Outdoor sensor
protected from condensation.

• Tempreadingrange:-40°Cto50°C
(-40°F to 122°F)

• Tempaccuracywithinrange:0.4°C

(0.72°F)

• Humidityreadingrange:5%to95%

• Humiditytempaccuratereadingrange:

-20°C to 50°C (-17°F to 122°F)

• Humidityaccuracyoverthatrange:

±4.5%

• Maximumrealtimeclockdriftover1

year: 7 minutes

• Verticalmounttocoveronegangbox

• FlameRating:UL94V-0

• RoHScompliant

• Relaylife:100,000cyclesat1A24Vac

69-2072—09 22

Power Supply

• 24Vac±20%50,60Hz(TrueIAQ

control)

• 24Vdc2-wireovercommunicationbus,

not polarized (outdoor sensor)

• Protectedagainstvoltagespikes

• Notprotectedagainstovervoltage

connection (ex 120 or 240V)

• Allsetupparametersarestored

indefinitely

In the Event of Power Failur e

• Real-timeclockismaintainedfor4

hours

• Alloutputsaredeactivated

• Allsetupparametersarestored

indefinitely

Mechanical Design

Dimensions: 2-3/4” W x 4-3/4” H x 7/8” D
(TrueIAQ control); 2-3/4” W x 3-3/4” H x 7/8”
D (Outdoor sensor)

Weight: .35 lbs (TrueIAQ control); .15 lbs
(Outdoor sensor)

Temperature Unit Display: °C/°F

5-year limited warranty

Honeywell warrants this product, excluding battery, to be free from defects in the workmanship or materials,
under normal use and service, for a period of five (5) years from the date of purchase by the consumer. If at
any time during the warranty period the product is determined to be defective or malfunctions, Honeywell
shall repair or replace it (at Honeywell’s option).
If the product is defective,
(i) return it, with a bill of sale or other dated proof of purchase, to the place from which you purchased it; or
(ii) call Honeywell Customer Care at 1-800-468-1502. Customer Care will make the determination whether
the product should be returned to the following address: Honeywell Return Goods, Dock 4 MN10-3860, 1885
Douglas Dr. N., Golden Valley, MN 55422, or whether a replacement product can be sent to you.
This warranty does not cover removal or reinstallation costs. This warranty shall not apply if it is shown by
Honeywell that the defect or malfunction was caused by damage which occurred while the product was in
the possession of a consumer.
Honeywell’s sole responsibility shall be to repair or replace the product within the terms stated above.
HONEYWELL SHALL NOT BE LIABLE FOR ANY LOSS OR DAMAGE OF ANY KIND, INCLUDING ANY
INCIDENTAL OR CONSEQUENTIAL DAMAGES RESULTING, DIRECTLY OR INDIRECTLY, FROM ANY BREACH
OF ANY WARRANTY, EXPRESS OR IMPLIED, OR ANY OTHER FAILURE OF THIS PRODUCT. Some states do
not allow the exclusion or limitation of incidental or consequential damages, so this limitation may not apply
to you.
THIS WARRANTY IS THE ONLY EXPRESS WARRANTY HONEYWELL MAKES ON THIS PRODUCT. THE
DURATION OF ANY IMPLIED WARRANTIES, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND
FITNESS FOR A PARTICULAR PURPOSE, IS HEREBY LIMITED TO THE FIVE-YEAR DURATION OF THIS
WARRANTY. Some states do not allow limitations on how long an implied warranty lasts, so the above limita­tion may not apply to you.
This warranty gives you specific legal rights, and you may have other rights which vary from state to state.
If you have any questions concerning this warranty, please write Honeywell Customer Relations, 1985
Douglas Dr, Golden Valley, MN 55422 or call 1-800-468-1502. In Canada, write Retail Products ON15-02H,
Honeywell Limited/Honeywell Limitée, 35 Dynamic Drive, Toronto, Ontario M1V4Z9.

23 69-2072—09

69-2072—09 24

25 69-2072—09

Automation and Control Solutions

Honeywell International Inc.
1985 Douglas Drive North
Golden Valley, MN 55422

Honeywell Limited-Honeywell Limitée
35 Dynamic Drive
Toronto, Ontario M1V 4Z9

http://yourhome.honeywell.com

® U.S. Registered Trademark.
© 2011 Honeywell International Inc.
Patents pending.
69-2072—09 M.S . Rev. 03-11
Printed in U.S.A.