Honeywell Home DR90A1000 User manual

D
C
A
B
F
G1
G2
G3
G4
E
DR90 (1)
10-in. duct collar (1)
6-in. duct collar (1)
MERV 11 Filter (1)
Filter Door (1)
Installation Guide
Prestige Comfort System (wireless)
TruelAQ
H8908 Manual Dehumidistat
VisionPRO IAQ control (included with
DR90VPIAQ)
Tools required to install DR90
3/8-in. hex drive
Drill or duct cutting tool
Wire stripper/cutter
Standard screwdriver
Duct tape
10-in. round duct and starter collar
18-22 gauge, 5 band thermostat wire
1/2-in. diameter drain line (8 ft.)
1/2-in. drain clamps (2)
Options
1/2-in. drain p-trap (may be required by local code)
Drain pan
PROFESSIONAL INSTALLATION GUIDE.
GUIDE D’INSTALLATION PROFESSIONNELLE.
GUÍA DE INSTALACIÓN PROFESIONAL.
OPTIONAL CONTROLS SOLD SEPARATELY
DR90A1000
INCLUDED IN THIS BOX
G3G2G4
G
F
G1
D
C
A
B
F
G 1
G 2
G 3
G 4
E
DR90 (1)
10-in. duct collar (1)
6-in. duct collar (1)
MERV 11 Filter (1)
Filter Door (1)
Installation Guide
Prestige Comfort System (wireless)
TruelAQ
H8908 Manual Dehumidistat
VisionPRO IAQ control (included with
DR90VPIAQ)
Toolsrequired to install DR90
3/8-in. hex drive
Drill or duct cutting tool
Wire stripper/cutter
Standard screwdriver
Duct tape
10-in. round duct and starter collar
18-22 gauge, 5 band thermostat wire
1/2-in. diameter drain line (8 ft.)
1/2-in. drain clamps (2)
Options
1/2-in. drain p-trap (may be required by local code)
Drain pan
PROFESSIONAL INSTALLATIONGUIDE.
GUIDE D’INSTALLATIONPROFESSIONNELLE.
GUÍA DE INSTALACIÓN PROFESIONAL.
OPTIONAL CONTROLS SOLD SEPARATELY
DR90A1000
INCLUDED IN THIS BOX
G 3 G 2 G 4
G
F
G 1
E
A
BC D
69-2407EFS-02
NOTE: The DR90A1000 and DR90VPIAQ models are obsolete.
E
A
BC D
69-2407EFS-02
NOTE: The DR90A1000 and DR90VPIAQ models are obsolete.

Liste de vérification
pour l’installation
Inclus dans cette boîte
A Unité DR90A1000 (1)
BCollet de conduite de 10 po
[25,4 cm] (2)
CCollet de conduite de 6 po
[15,2 cm] (1)
D Filtre MERV 11 (1)
E Trappe du filtre (1)
F Guide d’installation
Options de régulateurs (vendus
séparément)
G1 Système de confort Prestige
G2 True IAQ
G3 Déshumidistat manuel H8908
G4 Régulateur VisionPRO IAQ
(inclus avec le DR90VPIAQ)
Outils requis (non fournis)
• Tournevis cruciforme 3/8 po
• Outil de perçage ou de coupe
de conduit
• Dénudeur/coupe-fils
• Tournevis normal
• Ruban adhésif
•Collet de conduit et de départ
rond de 10 po (25,4 cm)
• Fil de thermostat 5 bandes
calibre 18-22
•Tuyau de vidange de 1/2 po de
dia. (8 pieds [2,4 m])
•Attaches de tuyau de vidange
de 1/2 po [1,3 cm] (2)
Options
• Siphon-P de vidange d’1/2 po
[1,3 cm] (peut-être requis par
le code local)
• Bac de récupération
Avertissement : L’installation
doit être effectuée par un
technicien d’entretien qualifié et
conformément aux codes locaux
en vigueur.
Couper l’alimentation vers
l’appareil avant d’installer ou de
réparer cet appareil.
Un raccordement de cet appareil
non conforme à ces instructions
peut entraîner des dommages à
l’appareil ou aux commandes.
INSTRUCTIONS D’INSTALLATION
COMMENCENT À LA PAGE 15
Lista de verificación para
la instalación
Esta caja incluye
A DR90A1000 (1)
BAnillo para conductos de
10 pulgadas [25,4 cm] (2)
C Anillo para conductos de
6 pulgadas [15,2 cm] (1)
D Filtro MERV 11 (1)
E Puerta del filtro (1)
F Guía de instalación
Opciones de control (se venden por
separado)
G1 Sistema de confort Prestige
G2 True IAQ
G3 Deshumidistato manual H8908
G4 Control VisionPRO IAQ
(incluido con DR90VPIAQ)
Herramientas necesarias (no se
suministran)
• Impulsor de cabeza hexagonal
de 3/8 pulgadas
• Taladro o herramienta cortante
para conductos
• Alicates o cortadores de cables
• Destornillador estándar
• Cinta para conductos
•Conducto redondo de 10 pulgadas
(25,4 cm) y collar de arranque
• Cable de termostato calibre
18 a 22, de 5 bandas
• Línea de desagüe de 1/2 pulgada
(1,3 cm) de diámetro (8 pies [2,4 m])
• Abrazaderas de desagüe de 1/2
pulgada [1,3 cm] (2)
Opciones
•Trampa en P para desagüe de 1/2
pulgada [1,3 cm] (es posible que el
código local la exija)
• Bandeja para drenaje
Advertencia: La instalación la debe
realizar un técnico de reparación
calificado y debe cumplir con los
códigos locales
Retire la fuente de energía del
dispositivo antes de instalar o
reparar el dispositivo.
Si no conecta el dispositivo según
estas instrucciones, el dispositivo o
los controles se pueden dañar.
LAS INSTRUCCIONES DE INSTALACIÓN
COMIENZAN EN LA PÁGINA 29
Installation Checklist
Included in This Box
A DR90A1000 (1)
B10-in. duct collar (2)
C6-in. duct collar (1)
DMERV 11 Filter (1)
E Filter Door (1)
F Installation Guide
Control Options (Sold separately)
G1 Prestige Comfort System
G2 True IAQ
G3 H8908 Manual Dehumidistat
G4 VisionPro IAQ Control
(included with DR90VPIAQ)
Tools Required (Not Supplied)
• 3/8-in. hex drive
•Drill or duct cutting tool
•Wire stripper/cutter
• Standard screwdriver
• Duct tape
•10-in. round duct and starter
collar
• 18-22 gauge, 5 band
thermostat wire
•1/2-in. diameter drain line (8 ft.)
• 1/2-in. drain clamps (2)
Options
•1/2-in. drain p-trap (may be
required by local code)
• Drain pan
Warning: Installation must be
performed by a qualified service
technician and must comply
with local codes.
Remove power to the device
before installing or servicing the
device.
Failure to connect the device
according to these instructions
may result in damage to the
device or the controls.
INSTALLATION INSTRUCTIONS
BEGIN ON PAGE 1

DR90
NEED HELP? For assistance with this product please visit http://customer.resideo.com
or call Customer Care toll-free at 1-800-468-1502.
Read and save these instructions.
® U.S. Registered Trademark. Patents pending. Copyright © 2021 All rights reserved.
?
DR90 Dehumidification System 69-2407EFS—02 1
ABOUT YOUR NEW DEHUMIDIFIER
Benefits .................................. 2
Maintaining Ideal Humidity ................... 2
Control Options ............................ 3
Specifications.............................. 4
INSTALLATION
Install to Fit Your Application.................. 5
Plumbing.................................. 6
Terminal Description......................... 7
Wiring .................................. 7
Checkout................................. 10
MAINTENANCE
Cleaning ................................. 10
Technical Description....................... 11
Troubleshooting ........................... 11
Refrigerant Charging ....................... 12
Compressor/Capacitor Replacement .......... 12
Parts List................................. 13
5-Year Limited Warranty..................... 14
• The DR90 is designed to be installed indoors in a space that is protected from rain and flooding.
•Install the unit with space to access the front panel for maintenance and service.
•Avoid directing the discharge air at people, or over the water in pool areas.
•If used near a pool or spa, be certain there is no chance the unit could fall into the water or be splashed,
and that it is plugged into a ground fault interrupt (GFI) outlet.
•To ensure quiet operation, do not place the device directly on the structural supports of the home.
•A drain pan must be placed under the unit if installed above a living area or above an area where water
leakage could cause damage.

About the DR90 Dehumidifier
The DR90 ensures the home is maintained at proper humidity levels through its high performance and
efficiency.
Benefits
• Removes up to 90 pints of water per day from the indoor air
• Built-in fresh air supply
• Energy Star Rated
Maintaining Ideal Humidity
Dew points and relative humidity (RH) affect the way your
body senses heat. Higher humidity levels cause the air to feel
much hotter than the actual temperature. When maintained
properly, your cooling equipment may not run as much because
dehumidified air feels cooler.
Ideal humidity is defined by industry experts* as being between
40-60% on an average annual basis.
When indoor humidity exceeds
60%, the home is more susceptible
to mold and mildew growth. DR90
safeguards against excessive
humidity in the home year-round.
*American Society of Heating, Refrigerating
and Air Conditioning Engineers (ASHRAE).
M24780
010203040506070809
0100
OPTIMUM
ZONE
BACTERIA
VIRUSES
FUNGI
MITES
RESPIRATORY
INFECTIONS
ALLERGIC RHINITIS
AND ASTHMA
CHEMICAL
INTERACTIONS
OZONE
PRODUCTION
ASHRAE RECOMMENDED WINTER DESIGN LEVEL
00159095808570756065505540453035202510150
001 4418312316210215110117014011019979593919
59 631031421811411
0117014011018969493919098878
09 221711311901601201001896959391909887868584838
58 801501201997959391909988
878685848382818089787
08 199888786868583828181808979787777767574737
57 0897978787777767675757474737372727
17079696
07 271717171717070707969686867676666656564646
WHAT THE AIR FEELS LIKE
HOW HOT THE HEAT-HUMIDITY COMBINATION MAKES IT FEEL.
EXAMPLE: AIR AT 90ºF WITH 50% RH FEELS LIKE 96ºF TO THE HUMAN BODY!
RELATIVE HUMIDITY (PERCENTAGE)
EXTREME DANGER
EXTREME CAUTION
CAUTION
M27328
DANGER
AIR TEMPERATURE
(DEGREES FAHRENHEIT)
SOURCE: TEMPERATURE - HUMIDIY INDEX WAS DERIVED BY R.G. STEADMAN, JOURNAL OF APPLIED METEOROLOGY, JULY 1979.
DR90 Dehumidification System 69-2407EFS—02
2

VisionPRO IAQ Total Comfort System (YTH9421C1010)
• Controls both heating/cooling and dehumidification.
• Sensor included for displaying outdoor temperature.
• Intuitive user interface for easy 7-day temperature programming.
• Easy-to-read backlit digital display.
• Maintenance and service reminders.
• Controls other indoor air quality equipment.
TrueIAQ Digital Control (DG115EZIAQ)
• Automatic adjustments maintain ideal humidity.
• Sensor for displaying outdoor temperature and humidity.
• Shows actual and desired humidity settings.
• Advanced ventilation programming includes economizing and extreme
condition shutdown.
• Maintenance and service reminders.
• Controls other indoor air quality equipment.
Manual Dehumidistat (H8908DSPST) and Automatic Ventilation
Controls (W8150A1000)
• Manual humidity control with intuitive comfort settings.
• Integrated humidity chart for accurate control in changing outdoor
conditions.
• Automatic W8150 ventilation control to ASHRAE standard, or for
continuous operation.
Control Options
The DR90 may be used with one of the following external controls:
Prestige™ Comfort System
• Controls both heating/cooling and dehumidification.
• Shows actual and desired humidity on an intuitive digital display.
• Wireless sensor for displaying outdoor temperature and humidity.
• Maintenance and service reminders.
• High definition color display.
DR90 Dehumidification System 69-2407EFS—02 3

Specifications
Install DR90 according to National Electric Codes.
Dimensions in inches and (mm):
Product weight: 92.2 lbs. (41.8 kg)
Shipping weight: 102 lbs. (46.3 kg)
Shipping dimensions: 21.5 in. H x 18.5 in. W x 40.2 in. L
Media Filter: MERV 11, 13.75 in. H x 13.75 in. W x .75 in. D
Drain connection: 3/4-in. threaded female NPT connection,
with attached 3/4-in. male connection.
Duct connections: 10-in. round inlet and outlet. 6-in. supply
inlet. ABS plastic, compatible for connection to rigid or
flexible ducting with sheet metal screws and/or tape.
Cabinet: 20 gauge galvanized steel powder-coat painted.
Insulation: R value 1
Compressor: Rotary-style, 6.8 KBTU
Refrigerant: R-410A, 1.0 lbs.
Operating Temp Range (outside cabinet):
34ºF to 135ºF (1.1ºC to 57.2ºC)
Operating Humidity Range: 0-99% RH
Input ratings
• Electrical input voltage: 120 VAC,
60 Hz nominal
• Input current: 6.7 amps
Output ratings
• Power transformer to R/C
terminals: 24 VAC, 0.85 A
• Energy Performance: 2.5 liters
(5.3 pints) per kilowatt hour (KWH)
Standards and approval body
requirements
ETL Tested per standard UL 474 ducted
dehumidifier.
ENERGY STAR rated.
Dry-Bulb Temp Intake Humidity Capacity (Pints/Day)
80°F (26.7°C) 60% RH 90
70°F (21.1°C) 60% RH 77
60°F (15.6°C) 60% RH 47
Home Size
(square ft [m]) Dehumidifier Capacity Required to Maintain Desired Indoor RH*
60% RH Indoor
(pints/day) 50% RH Indoor (pints/day) 40% RH Indoor (pints/day)
2080 (193.2) 49–54 55–58 71–78
2600 (241.5) 61–68 65–72 90–97
3120 (289.9) 75–82 79–86 95–110
* Based on extreme climates where outdoor humidity is 70-90% RH. For less extreme climates, larger
homes can be adequately served with less capacity. Actual requirements may vary.
Airflow versus external static
pressure (0–1 in. [0 - 25.4 mm] water
pressure) with collars attached
0 in. (0 mm) 235 CFM
0.2 in. (5 mm) 210 CFM
0.4 in. (10 mm) 195 CFM
0.6 in. (15.2 mm) 175 CFM
3 3/16
(81) 33 7/16 (849)
3 3/16
(81)
21 9/32
(541)
14 3/8 (365)
M28840
DR90 Dehumidification System 69-2407EFS—02
4

Install to Fit Your Application
DR90 Dehumidification System 69-2407EFS—02 5
Flex duct is recommended in connecting to the DR90 collars to reduce vibration noise.
M24745
Electrical requirements:
115 VAC outlet. Ground fault
interrupter (GFI) recommended.
Duct Sizing: Use minimum 10-in. diameter round for
duct lengths up to 25 ft. Minimum 12-in. required for
lengths longer than 25 ft. Duct branches from the
main inlet/exhaust should be minimum 10-in. round
for 2-3 branches, and 12-in. round or larger for 4
branches or more.
For the optional fresh air ventilator port, use 6-in.
round, insulated duct for lengths up to 50 ft.
Use 8-in. round duct for more than 50 ft. of if more
than 100 CFM is required.
Isolated Areas: Effective dehumidification may require
ducting to isolated or stagnant air flow areas.
SUPPLY
RETURN
AIR HANDLER
DR90
M27325
AMain Return to Main Return
Ideal when…
• Running DR90 with A/C operation.
• Minimizing discharge air temperature
(DAT) increase is preferred.
• Space dictates.
SUPPLY
RETURN
AIR HANDLER
DR90
M27324
BACKDRAFT
DAMPER
BMain Return to Main Supply
Ideal when…
• Running DR90 opposite A/C operation.
Running with A/C operation requires
damper on the exhaust port to
minimize backdraft when DR90 is not
on but A/C is.
• Space dictates.

Ideal when…
• Drying a specific area of the house.
• Running with A/C operation requires
backdraft damper on the exhaust port
to minimize backdraft when DR90 is
not on but A/C is.
SUPPLY
RETURN
AIR HANDLER
DR90
M27326
SEPARATE
RETURN
BACKDRAFT
DAMPER
C
Dedicated Return to Main Supply
Ideal when…
• Drying a specific conditioned or
unconditioned area, such as attic,
basement, or crawl space.
• Running with A/C operation.
• Minimizing DAT is preferred.
Connect 1/2-in. drain tube to male connection drain out-
let. Secure drain tube to connector with hose clamp.
Run drain hose continuously downhill to an approved
drain or condensate pump.
Plumbing
Install to Fit Your Application (continued)
DR90 Dehumidification System 69-2407EFS—02
6
SUPPLY
RETURN
AIR HANDLER
M27601
DR90
SEPARATE
RETURN
D
Dedicated Return to Main Return

Terminal Description
*NOTE: The outer screws on the terminal block
secure the block to the chassis. They are not
used for wiring.
A wiring terminal block is located on the side
panel of the unit.
The four terminals for the terminal block (reading
from left to right in the photo) are:
DHUM: Compressor and fan operation for
dehumidification
R: DR90 24V output
FAN: Fan activation only for ventilation
C: DR90 24V output
External 24V devices can be powered from R and
C terminals (20VA max.).
Wiring
Wire the DR90 according to the diagram that applies to your desired operation.
DR90 Dehumidification System 69-2407EFS—02 7
DR90
HVAC
THERMOSTAT
GYWR C
M29839
DHUM
+
+
RFANC
C
Rc
R
H
H
DH
DH
W
W2
Y
Y2
G
K
NOTE:
THERMOSTAT MUST BE CONFIGURED TO DRIVE FURNACE FAN
DURING DEHUMIDIFICATION CALL.
Follow this diagram if using the
Prestige™ thermostat.
CAUTION: Low voltage hazard.
Can cause equipment damage.
Disconnect HVAC equipment before beginning installation.

Wiring (continued)
DR90 Dehumidification System 69-2407EFS—02
8
Follow this diagram for
ducted operation with an
external humidity control.
HVAC
MECHANICAL
DEHUMIDISTAT
THERMOSTAT
GYWRRc
GYWR C
M29840
DRY
CONTACTS
+
+
FANC
DPDT RELAY,
2.6A
DHUM R
DR90
Follow this
diagram for
ducted operation
with external
humidity and
ventilation
control.
DR90
HVAC
MECHANICAL
DEHUMIDISTAT
THERMOSTAT
GY
W
RRc
GYWR C
M29841
DRY
CONTACTS
DHUM
+
+
RFANC
DPDT
RELAY,
2.6A
EARD-6
AT120
R
C
DAMPER
AUX
REMOTE
W8150A
G
R
C
C
W
G

Wiring (continued)
Follow this diagram if using DR90 with a
powered dehumidistat such as TrueIAQ
(DG115EZIQ).
HVAC
THERMOSTAT
GYWRRc
M29842
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.
PROGRAM ISU SETTING 60 TO Ø TO FORCE SYSTEM FAN ON WITH DEHUMIDIFICA
TION CALL.
DHUM
R
FAN
C
+
+
C
68 40
55
1215
:
76 %
%
In
Out
PM
R
C
W
Y
G
R
C
SENSOR
SENSOR
SWITCH
W
G
VENT
VENT
DEHUM
DEHUM
HUM
HUM
OUTDOOR
SENSOR
(PROVIDED)
EARD-6
TrueIAQ
1
1
2
2
DR90
DR90 Dehumidification System 69-2407EFS—02 9
Follow this diagram if using DR90 with
a VisionPRO IAQ.
M29843
FAN
FURNACE BOARD
EQUIPMENT INTERFACE MODULE (EIM)
G
C
CONV.HP
1
2
3
C
R
RC
RH
W1
W2
W3
Y
Y2
G
O/B
AUX
AUX2
Y
Y2
G
H1
U
M2
D1
H
M2
V1
N
T2
HEAT 1 RELAY
HEAT 2 RELAY
HEAT 3 RELAY
COOL 1 RELAY
COOL 2 RELAY
FAN RELAY
VISIONPRO IAQ
D-1
R-2
C-3
DHUM
R
FAN
C
+
+
OR
EARD-6
DR90

Cleaning
Apply power to DR90. Turn the humidity control to a low RH% level to initiate a dehumidification call.
Confirm that the DR90 compressor and fan turn on. The furnace blower will also turn on to circulate air. This
will take up to two minutes. Be sure to turn the control to the desired RH% or to Off when checkout is com-
plete.
Checkout
DR90 Dehumidification System 69-2407EFS—02
10
On an annual basis, maintenance is required to ensure DR90 runs at peak efficiency.
1 2
3 4
Unplug DR90 before beginning service.
Remove the magnetic filter door.
Remove filter (50049536-003) and
replace with new filter.
Remove the panels on each side of the
DR90. Using a damp cloth, wipe excess
dust and debris from blower, refrigerant
coils, and compressor coils. Reattach
cabinet panels when finished.
5
When service is complete, initiate
a call for dehumidification and
check that the compressor and fan
activate. If using the VisionPRO IAQ or
TrueIAQ controls, reset maintenance
reminders.
Check the drain connection and drain
line to ensure it is clear of debris and
sludge. Ensure all hose connections
are secure once maintenance of the
drain lines is complete.

DR90 Dehumidification System 69-2407EFS—02 11
On an annual basis, maintenance is required to ensure DR90 runs at peak efficiency.
Technical Description
DR90 uses a refrigeration system similar to an air
conditioner to remove heat and moisture from incoming
air and add heat to the air that is discharged. Hot, high-
pressure refrigerant gas is routed from the compressor
to the condenser coil. The refrigerant is cooled and
condensed by giving up its heat to the air that is about
to be discharged from the unit. The refrigerant liquid
then passes through a filter drier and capillary tubing
which causes the refrigerant pressure and temperature
to drop. It next enters the evaporator coil where it
absorbs heat from the incoming air and evaporates.
The evaporator operates in a flooded condition,
which means that all the evaporator tubes contain
liquid refrigerant during normal operation. A flooded
evaporator should maintain nearly constant pressure
and temperature across the entire coil, from inlet to
outlet.
Problem Recommended Troubleshooting Steps
No dehumidification. Neither
fan nor compressor run and the
ventilation timer is OFF.
1. Unit unplugged or no power to outlet.
2. Humidity control set too high or defective.
3. Loose connection in internal or control wiring.
4. Defective Compressor relay.
5. Defective control transformer.
6. Optional Condensate Pump Safety Switch open.
No dehumidification. Compressor
does not run but fan runs when
there is a call for dehumidification
and the ventilation control is OFF.
1. Defective compressor run capacitor.
2. Bad connection in compressor circuit.
3. Defective compressor overload.
4. Defective compressor.
5. Defrost thermostat open.
6. Optional Condensate Pump Safety Switch open.
Fan runs when there is a call
for dehumidification and the
ventilation control is OFF, but the
compressor cycles on and off too
frequently.
1. Low ambient temperature and/or humidity causing unit to cycle
through defrost mode.
2. Defective compressor overload.
3. Defective compressor.
4. Defrost thermostat defective.
5. Dirty air filter(s) or airflow restricted.
6. Low refrigerant charge, causing defrost control to cycle.
7. Bad connection in compressor circuit.
CONDENSER
EVAPORATOR
CAPILLARY
TUBES
ACCUMULATOR
COMPRESSOR
STRAINER/FILTER
DRIER
M27404
Troubleshooting
CAUTION: Servicing the DR90 with its high pressure refrigerant system and high voltage
circuitry presents a health hazard which could result in death, serious bodily injury, and/or
property damage. Service should only be performed by a qualified service technician.

Troubleshooting (continued)
Problem Recommended Troubleshooting Steps
Fan does not run with
ventilation activated.
Compressor runs briefly
but cycles on & off with
humidity control turned to
ON.
1. Loose connection in fan circuit.
2. Obstruction prevents fan rotation.
3. Defective fan.
4. Defective fan relay.
5. Defective fan capacitor.
Evaporator coil frosted
continuously, low
de-humidifying capacity.
1. Defrost thermostat loose or defective.
2. Low refrigerant charge.
3. Dirty air filter(s) or airflow restricted.
Unit not providing
ventilation. 1. Check control wire connections (check connections at fresh air damper
also).
2. Defective fresh air damper.
3. Dirty air intake. Clean outside intake hood.
Unit removes some
water, but not as much as
expected.
1. Air temperature and/or humidity have dropped.
2. Humidity meter and or thermometer used are out of calibration.
3. Unit has entered defrost cycle.
4. Dirty air filter.
5. Defective defrost thermostat.
6. Low refrigerant charge.
7. Air leak such as loose cover or ducting leaks.
8. Defective compressor.
9. Restrictive ducting.
10. Optional Condensate Pump Safety Switch open.
Unit Test to determine
problem: 1. Detach field control wiring connections from main unit.
2. Connect the R and FAN contacts from the main unit together; only the
impeller fan should run. Disconnect the wires.
3. Connect the R and DHUM contacts from the main unit together; the
compressor and impeller fan should run.
4. If these tests work, the main unit is working properly. You should check
the control panel and field control wiring for problems next.
5. Remove the control panel from the mounting box and detach it from the
field installed control wiring. Connect the blue, yellow, and green wires
from the control panel directly to the corresponding colored pigtails on
the main unit. Leave the violet, white, and red wires disconnected!
6. Turn on the humidity control. The compressor and impeller fan should
run.
7. If these tests work, the problem is most likely in the field control wiring.
Refrigerant Charging
If the refrigerant charge is lost due to service or a leak, a new charge must be accurately weighed in. If any
of the old charge is left in the system, it must be recovered before weighing in the new charge. Refer to the
unit nameplate for the correct charge weight and refrigerant type.
Compressor/Capacitor Replacement
This compressor is equipped with a two terminal external overload and a run capacitor, but no start
capacitor or relay.
DR90 Dehumidification System 69-2407EFS—02
12

Parts List
12 3
4
9
86 7
10
M28837
5
11 12
Figure
Reference Description Part Number
1 DR90 with no controls DR90A1000
2 DR90 with VisionPRO IAQ Control DR90VPIAQ
3Prestige Comfort System YTHX9321R5003
4VisionPRO IAQ Total Comfort Control YTH9421C1010
5TrueIAQ Digital IAQ Control DG115EZIAQ
6H8908D Manual Dehumidistat H8908DSPST
7Automatic ventilation control W8150A1001
8Motorized ventilation damper EARD 6
Compressor run capacitor 50049536-001
Blower assembly 50027976-001
9 Filter 50049536-003
10 6-in. Duct collar 50049536-004
11 10-in. Duct collar 50049536-005
12 Magnetic door 50049536-006
Compressor relay, SPST, 24 Vac, 30A 50035445-014
Fan relay, SPDT, 24 Vac, 15A 50035445-011
Transformer 120/24 Vac, 40 VA 50035445-013
DR90 Dehumidification System 69-2407EFS—02 13

www.resideo.com
© 2021 Resideo Technologies, Inc. All rights reserved.
The Honeywell Home trademark is used under license from Honeywell International, Inc. This product is manufactured by Resideo Technologies, Inc. and its affiliates.
Tous droits réservés. La marque de commerce Honeywell Home est utilisée avec l’autorisation d’Honeywell International, Inc. Ce produit est fabriqué par Resideo Technologies, Inc. et ses sociétés affiliées.
Todos los derechos reservados. La marca comercial Honeywell Home se utiliza bajo licencia de Honeywell International, Inc. Este producto es fabricado por Resideo Technologies, Inc. y sus afiliados.
Resideo Technologies, Inc.
1985 Douglas Drive North, Golden Valley, MN 55422
https://customer.resideo.com
69-2407EFS—02 M.S. Rev. 07-21 | Printed in United States
Resideo warrants this product to be free from defects in workmanship or materials, under normal use and
service, for a period of five (5) years from the date of first purchase by the original purchaser. If at any time
during the warranty period the product is determined to be defective due to workmanship or materials,
Resideo shall repair or replace it (at Resideo’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 Resideo Customer Care at 1-800-468-1502. Customer Care will make the determination whether the
product should be returned to the following address: Resideo Return Goods, 1985 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
Resideo that the defect was caused by damage which occurred while the product was in the possession of
a consumer.
Resideo’s sole responsibility shall be to repair or replace the product within the terms stated above.
RESIDEO 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 limita-
tion may not apply to you.
THIS WARRANTY IS THE ONLY EXPRESS WARRANTY RESIDEO 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 lim-
itation 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 Resideo Customer Care, 1985 Douglas Dr,
Golden Valley, MN 55422 or call 1-800-468-1502.
5-Year Limited Warranty

DR90
BESOIN D’AIDE? Pour obtenir de l’aide sur ce produit, prière de visiter le site
http://customer.resideo.com ou d’appeler le service d’assistance à la clientèle
au 1-800-468-1502.
Lire et conserver ces instructions.
® Marque déposée américaine. Brevets en instance. Copyright © 2021 Tous droits réservés.
?
Système de déshumidification DR90 69-2407EFS—02 15
À PROPOS DU NOUVEAU DÉSHUMIDIFICATEUR
Avantages ................................ 16
Maintien d’une humidité idéale ............... 16
Options de régulateurs...................... 17
Spécifications............................. 18
INSTALLATION
Installation en fonction de l’application ........ 19
Raccordement ............................ 20
Description des bornes ..................... 21
Câblage ................................. 21
Vérification ............................... 24
ENTRETIEN
Nettoyage ............................... 24
Description technique ...................... 25
Dépannage ............................... 25
Charge de fluide frigorigène ................. 26
Remplacement du compresseur/condensateur . 26
Liste des pièces ........................... 27
Garantie limitée de 5 ans .................... 28
• Le modèle DR90 est destiné à être installé à l’intérieur dans un lieu protégé de la pluie et des
inondations.
•Installer l’unité en assurant le dégagement nécessaire pour l’accès au panneau pour la maintenance et
l’entretien.
•Éviter de diriger l’air d’évacuation vers les personnes ou sur l’eau des piscines.
•Si le produit est utilisé près d’une piscine ou d’un spa, veiller à garantir que l’unité ne peut pas tomber
dans l’eau ou être éclaboussée, et qu’elle est raccordée à un disjoncteur de fuite à la terre.
•Pour garantir un fonctionnement silencieux, ne pas placer l’unité directement sur les supports de
structure du bâtiment.
• Un bac de récupération doit être placé sous l’unité si elle est installée au-dessus d’une zone habitée ou
d’une zone où une fuite d’eau pourrait causer des dommages.

À propos du déshumidificateur DR90
Le DR90 permet de maintenir les niveaux d’humidité adéquats dans toute la maison grâce à sa haute
performance et son efficacité.
Avantages
• Retire jusqu’à 90 chopines (43 l) d’eau par jour de l’air
intérieur
• Alimentation en air frais intégrée
• Certifié Energy Star
Maintien d’une humidité idéale
Les points de rosée et d’humidité relative (HR) affectent la
manière dont le corps ressent la chaleur. Des niveaux d’humidité
élevés causent une perception de chaleur accrue par rapport à
la température réelle. Lorsqu’il est bien entretenu, l’équipement
de refroidissement peut ne pas tourner autant car l’air
déshumidifié semble plus frais.
L’humidité idéale est définie par les experts de l’industrie*
comme se situant entre 40 et 60 % sur une base annuelle
moyenne.
Lorsque l’humidité intérieure
dépasse 60%, l’habitation est plus
susceptible à la moisissure. L’unité
DR90 protège de l’humidité exces-
sive dans la maison tout au long de
l’année.
* Société américaine des ingénieurs en
chauffage, refroidissement et climatisation
(ASHRAE).
M24780
010203040506070809
0100
OPTIMUM
ZONE
BACTERIA
VIRUSES
FUNGI
MITES
RESPIRATORY
INFECTIONS
ALLERGIC RHINITIS
AND ASTHMA
CHEMICAL
INTERACTIONS
OZONE
PRODUCTION
ASHRAE RECOMMENDED WINTER DESIGN LEVEL
00159095808570756065505540453035202510150
001 4418312316210215110117014011019979593919
59 631031421811411
0117014011018969493919098878
09 221711311901601201001896959391909887868584838
58 801501201997959391909988
878685848382818089787
08 199888786868583828181808979787777767574737
57 0897978787777767675757474737372727
17079696
07 271717171717070707969686867676666656564646
NOTRE PERCEPTION DE LA TEMPÉRATURE DE L’AIR
NOTRE PERCEPTION DE LA CHALEUR COMBINÉE À L’HUMIDITÉ
EXEMPLE : À 90 °F ET 50 % D’HUMIDITÉ RELATIVE, LA TEMPÉRATURE PERÇUE PAR NOTRE CORPS ATTEINT 96 °F!
HUMIDITÉ RELATIVE (POURCENTAGE)
DANGER EXTRÊME
PRUDENCE EXTRÊM
E
PRUDENCE
MF27328
DANGER
TEMPÉRATURE DE L’AIR
(DEGRÉ FAHRENHEIT)
SOURCE : INDICE DE TEMPÉRATURE-HUMIDITÉ DÉRIVÉ PAR R.G. STEADMAN, JOURNAL OF APPLIED METEOROLOGY, JUILLET 1979.
Système d’humidification DR90 69-2407EFS—02
16

Système confort total VisionPRO IAQ (YTH9421C1010)
• Régule le chauffage/refroidissement ainsi que la déshumidification.
• Capteur inclus pour l’affichage de la température extérieure.
• Interface utilisateur intuitive pour une programmation facile de la
température sur 7 jours.
• Afficheur numérique rétroéclairé facile à lire.
• Rappel pour la maintenance et l’entretien.
• Régule l’autre équipement de qualité de l’air intérieur.
Régulateur numérique TrueIAQ (DG115EZIAQ)
• Les réglages automatiques maintiennent une humidité idéale.
• Capteur pour afficher la température et l’humidité extérieures.
• Indique les réglages d’humidité réel et désiré.
• La programmation de ventilation avancée inclut un programme
économique et l’arrêt en cas de condition extrême.
• Rappel pour la maintenance et l’entretien.
• Régule l’autre équipement de qualité de l’air intérieur.
Déshumidistat manuel (H8908DSPST) et commandes de
ventilation automatiques (W8150A1000)
• Régulateur d’humidité manuel avec réglages de confort intuitifs.
• Tableau d’humidité intégré pour une régulation précise même avec des
conditions extérieures changeantes.
• Régulateur de ventilation W8150 automatique conforme aux normes
ASHRAE ou pour fonctionnement en continu.
.
Options de régulateurs
Le DR90 peut être utilisé avec l’un des régulateurs externes suivants :
Système de confort Prestige™
• Régule le chauffage/refroidissement ainsi que la déshumidification.
• Indique l’humidité réelle et désirée sur l’afficheur numérique intuitif.
• Capteur sans fil pour afficher la température et l’humidité extérieures.
• Rappel pour la maintenance et l’entretien.
• Afficheur couleur haute définition.
Système d’humidification DR90 69-2407EFS—02 17

Spécifications
Installer le DR90 conformément au code électrique local en vigueur.
Dimensions en pouces et (mm) :
Poids du produit : 92.2 livres (41,8 kg)
Poids d’expédition : 102 livres (46,3 kg)
Dimensions d’expédition : 21,5 po (H) x 18,5 po (I) x
40,2 po (L)
Filtre à fibres : MERV 11, 13,75 po (H) x 13,75 po I) x
0,75 po (P)
Raccord d’évacuation : Raccord NPT femelle fileté de
3/4 po avec raccord mâle de 3/4 po attaché.
Raccords de conduit : Entrée et sortie rondes de 10 po.
Entrée de 6 po. Plastique ABS compatible pour un
raccordement à des conduits rigides ou flexibles avec
vis à tôle et/ou ruban adhésif.
Armoire : Acier galvanisé calibre 20 à revêtement de
peinture par pulvérisation.
Isolation : R valeur 1
Compresseur : rotatif, 6,8 KBtu
Fluide frigorigène : R-410A, 1,0 livres
Plage de température de fonctionnement
(armoire externe) : 34 ºF à 135 ºF (1.1 ºC à 57,2 ºC)
Plage d’humidité de fonctionnement : 0-99 % d’HR
Caractéristiques d’entrée
• Tension d’entrée électrique :
120 V c.a., 60 Hz nominaux
• Courant d’entrée : 6,7 A
Caractéristiques de sortie
• Transformateur de puissance aux
bornes R/C : 24 V c.a., 0,85 A
• Performance énergétique : 2,5 litres
(5,3 chopines) par kilowattheure (KWH)
Normes et exigences réglementaires
Testé ETL selon la norme UL 474 pour les
déshumidificateurs à conduit.
Certifié ENERGY STAR.
Dimensions de
l’habitation
(pieds [m] carrés)
Capacité requise du déshumidificateur pour maintenir l’HR intérieure désirée*
60% d’HR intérieure
(chopines/jour) 50% d’HR intérieure (chopines/jour) 40% d’HR intérieure (chopines/jour)
2080 (193,2) 49–54 55–58 71–78
2600 (241,5) 61–68 65–72 90–97
3120 (289,9) 75–82 79–86 95–110
* Basée sur des climats extrêmes avec une humidité relative extérieure de 70-90 %. Pour les climats moins extrêmes,
une capacité moindre peut servir des habitations plus grandes. Les exigences réelles peuvent varier.
Rapport débit d’air-pression statique
externe (pression d’eau 0-1 po
[0 a 25,4 mm]) avec collets attachés
0 po (0 mm) 235 CFM (pi3/min)
0,2 po (5 mm) 210 CFM (pi3/min)
0,4 po (10 mm) 195 CFM (pi3/min)
0,6 po (15,2 mm) 175 CFM (pi3/min)
3 3/16
(81) 33 7/16 (849)
3 3/16
(81)
21 9/32
(541)
14 3/8 (365)
M28840
Temp. de bulbe sec Humidité de l’air d’admission Capacité (chopines par jour)
80°F (26,7°C) 60% RH* 90
70°F (21,1°C) 60% RH 77
60°F (15,6°C) 60% RH 47
* RH = HUMIDITÉ RELATIVE
Système d’humidification DR90 69-2407EFS—02
18