Honeywell DR90A3000, DR120A3000 Installation Manual
DR90/DR120A3000
33-00298EFS-01
TrueDRY™ DR90 (1) or
TrueDRY™ DR120 (1)
10-in. duct collar (2)
6-in. duct collar (1)
MERV 11 Filter (1)
Filter Door (2)
Installation Guide
Prestige Comfort System (RedLINK
TruelAQ
H8908 Manual Dehumidistat
VisionPRO IAQ control
3/8-in. hex drive
Drill or duct cutting tool
Wire stripper/cutter
Scissors or utility knife
Standard screwdriver
T25 Torx screwdriver
Duct tape
10-in. round duct and starter collar
3/4-in. male NPT to drain line adaptor (1/2-in. Dia.
recommended)
1/2-in. diameter drain line (8 ft.)
1/2-in. drain clamps (2)
1/2-in. drain p-trap (may be required by local code)
Drain pan
Float switch or water sensor
69-2690EFS-02
DR90/DR120A3000
D
C
A
1
A
2
B
F
G
1
G
2
G
3
G
4
E
™ Wireless)
Tools required to install TrueDRY DR90/DR120
Options
PROFESSIONAL INSTALLATION GUIDE
GUIDE D’INSTALLATION PROFESSIONNELLE
GUÍA DE INSTALACIÓN PROFESIONAL
OPTIONAL CONTROLS SOLD SEPARATELY
INCLUDED IN THIS BOX
G
F
E
A1A
2
B C
D
G4G3G2G
1
INCLUDED IN THIS BOX
PROFESSIONAL INSTALLATION GUIDE
GUIDE D’INSTALLATION PROFESSIONNELLE
GUÍA DE INSTALACIÓN PROFESIONAL
A1 A2
(or)
F
G
Tools required to install DR90/DR120A3000
Dehumidifier
3/8” hex drive
Drill or duct cutting tool
Wire stripper/cutter
Scissors or utility knife
Standard screwdriver
T25 Torx screwdriver
Duct tape
10” round duct and starter collar
3/4” male NPT to drain line adaptor (1/2” Dia.
recommended)
1/2” diameter drain line (8’)
1/2” drain clamps (2)
Options
1/2” drain p-trap (may be required by local code)
Drain pan
Float switch or water sensor
B
C
D
OPTIONAL CONTROLS SOLD SEPARATELY
G3G2 G4G1
DR90A3000 (1) or
A1
DR120A3000 (1)
A2
10” duct collar (2)
B
6” duct collar (1)
C
MERV 11 Filter (1)
D
Filter Door (2)
E
Installation Guide
F
G1
Prestige IAQ Kit
G2
TruelAQ
G3
H8908 Manual Dehumidistat
G4
VisionPRO or Prestige Thermostat
G5
H6062 HumidiPRO Digital Humidity Control
E
G5
Installation Checklist
Included in This Box
A1 DR90A3000 (1) or
A2 DR120A3000 (1)
B 10” duct collar (2)
C 6” duct collar (1)
D MERV 11 Filter (1)
E Filter Door (2)
F Installation Guide
Control Options (Sold separately)
G1 Prestige IAQ Kit
G2 TrueIAQ
G3 H8908 Manual Dehumidistat
G4 VisionPRO or Prestige
Thermostat
G5 H6062 HumidiPRO Digital
Humidity Control
Tools Required (Not Supplied)
• 3/8” hex drive
• Drill or duct cutting tool
• Wire stripper/cutter
• Scissors or utility knife
• Standard screwdriver
• T25 Torx screwdriver
• Duct tape
• 10” round duct and starter collar
• 1822 gauge, 5 band thermostat
wire
• 1/2” diameter drain line (8’)
• 1/2” drain clamps (2)
• 3/4” male NPT to drain
line adaptor (1/2” Dia.
recommended)
Options
•
1/2” drain p-trap (may be
required by local code)
•
Drain pan
• Float switch or water sensor
Liste de vérification
pour l’installation
Inclus dans cette boîte
A1 Unité DR90A3000 (1) ou
A2 Unité DR120A3000 (1)
B Collet de conduite de 10 po
[25,4 cm] (2)
C Collet de conduite de 6 po [15,2 cm]
(1)
D Filtre MERV 11 (1)
E Trappe du filtre (2)
F Guide d’installation
Options de régulateurs (vendus
séparément)
G1 Nécessaire Prestige IAQ
G2 True IAQ
G3 Déshumidistat manuel H8908
G4 Thermostat VisionPRO ou
Prestige
G5 Régulateur d’humidité
numérique HumidiPRO H6062
Outils requis (non fournis)
• Tournevis cruciforme 3/8 po
• Outil de perçage ou de coupe
de conduit
• Dénudeur/coupe-fils
• Ciseaux ou couteau à lame
rétractable
• Tournevis normal
• Tournevis Torx T25
• Ruban adhésif
• Collet de conduit et de départ
rond de 10 po (25,4 cm)
• Fil de thermostat 5 bandes
calibre 1822
• 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)
• Adaptateur mâle 3/4 po
NPT vers conduite de
vidange (diamètre de 1/2 po
recommandé)
Options
•
SiphonP de vidange d’1/2 po
[1,3 cm]
le code local)
•
Bac de récupération
• Flotteur ou capteur d’eau
(peut-être requis par
Lista de verificación para
la instalación
Esta caja incluye
A1 DR90A3000 (1) o
A2 DR120A3000 (1)
B Anillo 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 (2)
F Guía de instalación
Opciones de control (se venden por
separado)
G1 Kit Prestige IAQ
G2 True IAQ
G3 Deshumidistato manual H8908
G4 Termostato VisionPRO o Prestige
G5 Control de humedad digital
HumidiPRO H6062
Herramientas necesarias (no se
suministran)
• Impulsor de cabeza hexagonal
de 3/8 pulgadas
• Taladro o herramienta cortante
para conductos
• Alicates o cortadores de cables
• Tijera o navaja
• Destornillador estándar
• Destornillador Torx T25
• 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)
• NPT macho de 3/4 in para drenar el
adaptador de tubería (se recomienda
un diámetro de 1/2 in)
Opciones
• Trampa en P para desagüe de 1/2
pulgada [1,3 cm] (es posible que el
código local la exija)
• Bandeja para drenaje
• Interruptor del flotador o sensor de
agua
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 6
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 22
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 38
DR90/DR120A3000
!
ABOUT YOUR DEHUMIDIFIER
About the DR90/DR120A3000 Dehumidifier ......2
Control Options ....................................3
DR90 Specifications ...............................4
DR120 Specifications ..............................5
INSTALLATION
Install to Fit Your Application .......................6
Install to Fit Your Application (continued) ..........7
Plumbing ..........................................7
Terminal Description ...............................8
Wiring ...........................................8
Checkout .........................................11
• The DR90/DR120A3000 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.
MAINTENANCE
Cleaning ..........................................11
Technical Description .............................12
Troubleshooting ..................................12
DR90 Parts List ...................................14
DR120 Parts List ..................................15
5Year Limited Warranty ..........................16
• 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.
1. Never operate a unit with a damaged power cord. If the power cord is damaged it must be
replaced by the manufacturer, its service agent, or similarly qualified person in order to
avoid a hazard.
2. The appliance is not intended for use by persons (including children) with reduced
physical, sensory, or mental capabilities, or lack of experience and knowledge, unless they
have been given supervision or instruction concerning use of the appliance by a person
responsible for their safety. Children should be supervised to ensure that they do not play
with the appliance.
NEED HELP? For assistance with this product please visit http://forwardthinking.honeywell.com
or call Honeywell Customer Care toll-free at 18004681502.
?
Read and save these instructions.
® U.S. Registered Trademark. Patents pending. Copyright © 2017 Honeywell International Inc. All rights reser ved.
DR90/DR120A3000 Dehumidification System 3300298EFS01
1
About the DR90/DR120A3000 Dehumidifier
MCR24780
0100
WHAT THE AIR FEELS LIKE
EXTREME CAUTION
M27328
AIR TEMPERATURE
(DEGREES FAHRENHEIT)
SOURCE: TEMPERATURE - HUMIDIY INDEX WAS DERIVED BY R.G. STEADMAN, JOURNAL OF APPLIED METEOROLOGY, JULY 1979.
DR120
The Honeywell DR90/DR120A3000 ensures the home is maintained at proper humidity levels through its high
performance and efficiency.
Benefits
• Removes up to 90 (DR90) or 120 (DR120) pints of water
per day from the indoor air
• Built-in fresh air supply
• Energy Star Rated
• Built-in transformer circuit breaker
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 4060% on an average annual basis.
DR90
MCR36852
When indoor humidity exceeds
60%, the home is more susceptible
to mold and mildew growth. DR90/
DR120A3000 safeguards against
excessive humidity in the home yearround.
*American Society of Heating, Refrigerating
and Air Conditioning Engineers (ASHRAE).
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)
001 4418312316210215110117014011019979593919
59 631031421811411
09 221711311901601201001896959391909887868584838
58 801501201997959391909988
08 199888786868583828181808979787777767574737
57 0897978787777767675757474737372727
07 271717171717070707969686867676666656564646
17079696
ASHRAE RECOMMENDED WINTER DESIGN LEVEL
BACTERIA
VIRUSES
FUNGI
MITES
RESPIRATORY
INFECTIONS
ALLERGIC RHINITIS
AND ASTHMA
CHEMICAL
INTERACTIONS
OZONE
PRODUCTION
0117014011018969493919098878
878685848382818089787
010203040506070809
00159095808570756065505540453035202510150
EXTREME DANGER
DANGER
CAUTION
OPTIMUM
ZONE
2
DR90/DR120A3000 Dehumidification System 33-00298EFS—01
Control Options
The DR90/DR120A3000 may be used with one of the following external controls:
Prestige™ IAQ Kit
• Controls both heating/cooling and ventilation.
• Wireless sensor for displaying outdoor temperature and humidity.
• Advanced ventilation programming includes economizing and extreme
condition shutdown.
• Maintenance and service reminders.
• High definition color display.
• RedLINK™ Wireless technology
VisionPRO™ or Prestige™
• Controls both heating/cooling and ventilation.
• Wireless sensor for displaying outdoor temperature and humidity.
• Ventilation programming for time of day or Ashrae standards.
• Optional ventilation lockouts for high/low temp or humidity conditions
when C7089R1013 wireless outdoor sensor is used.
• WiFi™ or RedLINK™ Wireless technology
HumidiPRO Digital Control
• Manual dehumidification control
• Dehumidifier compressor protection
• RH% and outdoor temperature calibration
• Adjustable high and low range stops (1090%)
TrueIAQ Digital Control
• Automatic adjustments maintain fresh air in home.
• Sensor for displaying outdoor temperature and humidity.
• Advanced ventilation programming includes economizing and extreme
condition shutdown.
• Maintenance and service reminders.
• Controls other indoor air quality equipment.
Manual Dehumidistat and Automatic Ventilation Controls
• Manual humidity control with intuitive comfort settings.
• Automatic W8150 ventilation control to ASHRAE standard, or for
continuous operation.
DR90/DR120A3000 Dehumidification System 33-00298EFS—01 3
DR90 Specifications
3-3/16
3-3/16
19-3/8
14-3/8
25-13/16
M28840A
Install DR90A3000 according to National Electric Codes.
DryBulb Temp Intake Humidity Capacity (Pints/Day)
80°F (26.7°C) 60% RH 90
70°F (21.1°C) 60% RH 65
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) 4954 5558 7178
2600 (241.5) 6168 6572 9097
3120 (289.9) 7582 7986 95110
* Based on extreme climates where outdoor humidity is 7090% RH. For less extreme climates, larger
homes can be adequately served with less capacity. Actual requirements may vary.
Dimensions in inches and (mm):
(365)
(81)
(656)
(81)
Airflow versus external static pressure (01 in. [0 - 25.4 mm] water
pressure) with collars attached
0 in. (0 mm) 320 CFM
(492)
0.2 in. (5 mm) 280 CFM
0.4 in. (10 mm) 260 CFM
0.6 in. (15.2 mm) 215 CFM
Input ratings
Product weight: 86 lbs.
Shipping weight: 95 lbs.
Shipping dimensions: 25.2” H × 19.3” W × 35.8” L
Media Filter: MERV 11, 14” H × 17.5” W × 1.75” L
Drain connection: 3/4” threaded female NPT connection.
Duct connections: 10” round inlet and outlet. 6” supply inlet.
ABS plastic, compatible for connection to rigid or flexible
ducting with sheet metal screws and/or tape.
Cabinet: 20 ga
Insulation: R value 1
Compressor: Rotary, 7.3k BTU
Refrigerant: R410A, 25 oz
Operating Temp Range (outside cabinet):
34ºF to 135ºF (1.1ºC to 57.2ºC)
Operating Humidity Range: 099% RH
• Electrical input voltage: 120 VAC,
60 Hz nominal
• Input current: 5.3 A
Output ratings
• Power transformer to R/C
terminals: 24 VAC, 0.85 A
• Energy Performance: 2.9 liters
(6.1 pints) per kilowatt hour (KWH)
Standards and approval body
requirements
• ETL Listed per UL 474 and
CSA C22.2 No 92
• ENERGY STAR rated.
4
DR90/DR120A3000 Dehumidification System 33-00298EFS—01
DR120 Specifications
19-3/8
M33292
14-3/8
Install DR120A3000 according to National Electric Codes.
DryBulb Temp Intake Humidity Capacity (Pints/Day)
80°F (26.7°C) 60% RH 120
70°F (21.1°C) 60% RH 88
60°F (15.6°C) 60% RH 63
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) 4954 5558 7178
2600 (241.5) 6168 6572 9097
3120 (289.9) 7582 7986 95110
* Based on extreme climates where outdoor humidity is 7090% RH. For less extreme climates, larger
homes can be adequately served with less capacity. Actual requirements may vary.
Dimensions in inches and (mm):
(365)
3-3/16
(81)
25-13/16
(656)
3-3/16
(81)
Airflow versus external static pressure (01 in. [0 - 25.4 mm] water
pressure) with collars attached
0 in. (0 mm) 400 CFM
0.2 in. (5 mm) 345 CFM
0.4 in. (10 mm) 295 CFM
(492)
21
(533)
0.6 in. (15.2 mm) 250 CFM
Input ratings
Product weight: 95 lbs.
Shipping weight: 104 lbs.
Shipping dimensions: 26” H × 19.3” W × 35.8” L
Media Filter: MERV 11, 14” H ×17.5” W ×1.75” L
Drain connection: 3/4” threaded female NPT connection.
Duct connections: 10” round inlet and outlet. 6” supply inlet.
ABS plastic, compatible for connection to rigid or flexible
ducting with sheet metal screws and/or tape.
Cabinet: 20 ga
Insulation: R value 1
Compressor: Rotary, 9.4k BTU
Refrigerant: R410A, 30 oz
Operating Temp Range (outside cabinet):
34ºF to 135ºF (1.1ºC to 57.2ºC)
Operating Humidity Range: 099% RH
• Electrical input voltage: 120 VAC,
60 Hz nominal
• Input current: 7.3 A
Output ratings
• Power transformer to R/C
terminals: 24 VAC, 0.85 A
• Energy Performance: 2.9 liters
(6.1 pints) per kilowatt hour (KWH)
Standards and approval body
requirements
• ETL Listed per UL 474 and
CSA C22.2 No 92
• ENERGY STAR rated.
DR90/DR120A3000 Dehumidification System 33-00298EFS—01 5
Install to Fit Your Application
MCR36852
DR120
AIR HANDLER
M36843
DAMPER
M24745
AIR HANDLER
M36844
Flex duct is recommended in connecting to the DR90/DR120A3000 collars to reduce vibration noise.
A
DR90
Duct Sizing: Use minimum 10” diameter round for
duct lengths up to 25’ Minimum 12” required for
lengths longer than 25’ Duct branches from the main
inlet/exhaust should be minimum 10” round for 23
branches, and 12” round or larger for 4 branches or
more.
For the optional fresh air ventilator port, use 6” round,
insulated duct for lengths up to 50’
Use 8” round duct for more than 50’ of if more than
100 CFM is required.
Isolated Areas: Effective dehumidification may
require ducting to isolated or stagnant air flow areas.
Dedicated Return to Main Supply
RETURN
SEPARATE
RETURN
DEHUMIDIFIER
BACKDRAFT
SUPPLY
(OPTIONAL)
GRAVITY DAMPER
Electrical requirements:
115 VAC outlet. Ground fault
interrupter (GFI) recommended.
Ideal when…
• Access to dedicated central return for
dehumidifier is available.
• Requires backdraft damper on the
exhaust port to minimize backdraft
when dehumidifier is not on but A/C is.
• (optional) Duct humidifier supply with
20% open gravity damper to provide
dry air to a specific area
6
B
Main Return to Main Supply
RETURN
DEHUMIDIFIER
SUPPLY
BACKDRAFT
DAMPER
Ideal when…
• Running dehumidifier when not
running A/C.
• Requires damper on the exhaust port
to minimize backdraft when DR90/
DR120A3000 is not on but A/C is.
• Access to a dedicated central return is
not possible.
DR90/DR120A3000 Dehumidification System 33-00298EFS—01
Install to Fit Your Application (continued)
AIR HANDLER
M36845
M36846
SEPARATE
Main Return to Main Return
C
D
RETURN
DEHUMIDIFIER
SUPPLY
Dedicated Return to Dedicated Supply
DEHUMIDIFIER
RETURN
Ideal when…
• Running DR90/DR120A3000 with A/C
• Minimizing discharge air temperature
• Access to a dedicated return is not
NOTE: Running dehumidifier after A/C
shutoff may cause excess water on A/C
evaporator coil to re-humidify air for a
short amount of time.
Ideal when…
• The dehumidifier will not be ducted to a
operation.
(DAT) increase is preferred.
possible.
forced air HVAC system.
Plumbing
SUPPLY
Attach 3/4” male NPT drain nozzle.
Connect 1/2” drain tube to male connection drain outlet.
Secure drain tube to connector with hose clamp.
Run drain hose continuously downhill to an approved drain
or condensate pump.
The drain line must include a water trap to prevent air from
entering or exiting the dehumidifier.
DR90/DR120A3000 Dehumidification System 33-00298EFS—01 7
Terminal Description
HVAC
3
NOTE:
CAUTION: Low voltage hazard.
Can cause equipment damage.
Disconnect HVAC equipment before beginning installation.
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 dehumidifier unit.
The six terminals for the terminal block (reading
from left to right in the photo) are:
FLOAT: External low voltage float switch or
water sensor (two terminals). Use
normally closed switch.
DHUM: Compressor and fan operation for
dehumidification
R: DR90/DR120 24V output
FAN: Fan activation only for ventilation
C: DR90/DR120 24V output
External 24V devices can be powered from R and C
terminals (20VA max.).
Wiring
Wire the DR90/DR120A3000 according to the diagram that applies to your desired operation.
GYWR C
W
DHUM
C
Rc
R
H
H
DH
DH
R
FAN
DEHUMIDIFIER
+
C
M3685
Follow this diagram if using
the Prestige thermostat.
W2
Y
Y2
THERMOSTAT
G
K
+
FLOAT
THERMOSTAT MUST BE CONFIGURED TO DRIVE FURNACE FA N
DURING DEHUMIDIFICATION CALL.
8
DR90/DR120A3000 Dehumidification System 33-00298EFS—01
Wiring (continued)
M34595
HVAC
THERMOSTAT
M36854
DEHUMIDIFIER
Follow this diagram if
using the HumidiPro Digital
Humidity Controller.
Follow this diagram for
ducted operation with an
external humidity control.
RFloat DHUMFan C
GYWR C
C
R
U
U
S
S
DPDT RELAY,
2.6A
24 VAC
(CONSTANT)
CONTACTS
DRY
MECHANICAL
DEHUMIDISTAT
Follow this diagram for
ducted operation with
external humidity and
ventilation control.
HVAC
W
Rc
R
THERMOSTAT
FAN
C
DPDT
RELAY,
2.6A
+
C
+
DRY
CONTACTS
MECHANICAL
DEHUMIDISTAT
+
GYWRRc
FLOAT FLOAT
AT120
GYWR C
W8150A
G
R
C
C
W
G
GY
R
C
DAMPER
AUX
REMOTE
DHUM
+
FAN
R
DEHUMIDIFIER
EARD6TZ
DHUM
R
FLOAT
M36855
DR90/DR120A3000 Dehumidification System 33-00298EFS—01 9
Wiring (continued)
THERMOSTAT
M36856
M36857
EQUIPMENT INTERFACE MODULE (EIM)
1
Follow this diagram if using DR90/
DR120A3000 with a powered
dehumidistat such as TrueIAQ
(DG115EZIQ).
Follow this diagram if using DR90/
DR120A3000 with a VisionPRO IAQ.
2
1
2
VISIONPRO IAQ
FLOAT
FLOAT
DHUM
R
FAN
C
HVAC
R
C
W
Y
G
EARD6TZ
TrueIAQ
40
68
76
55
PM
:
12 15
GYWRRc
C
R
C
SENSOR
SENSOR
In
%
SWITCH
Out
%
OUTDOOR
SENSOR
(PROVIDED)
W
G
VENT
VENT
DEHUM
DEHUM
HUM
HUM
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.
+
FLOAT
DHUM
+
DEHUMIDIFIER
R
C
FAN
PROGRAM ISU SETTING 60 TO Ø TO FORCE SYSTEM FAN ON WITH DEHUMIDIFICATION CALL.
D-1
R-2
C-3
+
+
1
2
3
C
R
RC
RH
H1
U
M2
D1
H
M2
V1
N
T2
CONV.HP
O/B
W1
AUX
W2
AUX2
W3
Y
Y
Y2
Y2
G
G
OR
FAN
FURNACE BOARD
C
HEAT 1 RELAY
HEAT 2 RELAY
HEAT 3 RELAY
COOL 1 RELAY
COOL 2 RELAY
G
FAN RELAY
EARD6TZ
DEHUMIDIFIER
10
DR90/DR120A3000 Dehumidification System 33-00298EFS—01
Checkout
Apply power to DR90/DR120A3000. Turn the humidity control to a low RH% level to initiate a dehumidification call. Confirm that the DR90/DR120A3000 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 complete.
Cut and remove plastic strap
1 2
3
holding compressor in place.
This strap is only used for
shipping.
If using for ventilation, initiate
a call for ventilation. Confirm
that the DR90/DR120A3000
fan turned on, but that the
compressor remained off.
Apply power to DR90/
DR120A3000. Turn humidity
control to a low RH% to initiate a dehumidification call.
Confirm that the compressor
and fan turn on. The furnace
blower will also turn on to circulate air. Be sure to turn the
control to the desired RH% or
to Off when the checkout is
complete.
Cleaning
On an annual basis, perform the following maintenance requirement to ensure the dehumidifier runs at peak
efficiency.
Unplug DR90/
1 2
3 4
DR120A3000
before beginning
service. Remove
the magnetic
filter door.
Remove cover on output side of dehumidifier. Using a damp cloth, remove
excess dust and debris from blower and
internal cabinet. Reattach cover when
finished.
Remove filter
and replace
with new filter.
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.
When service is complete, initiate a call for dehumidification and check that the
5
DR90/DR120A3000 Dehumidification System 33-00298EFS—01 11
compressor and fan activate. If using the VisionPRO IAQ or TrueIAQ controls, reset
maintenance reminders.
Technical Description
COMPRESSOR
STRAINER/FILTER
M27404
DR90/DR120A3000 uses a refrigeration system similar
to an air conditioner to remove heat and moisture from
DRIER
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
CONDENSER
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
EVAPORATOR
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.
Troubleshooting
Troubleshooting videos are available on Honeywell’s CPRO YouTube channel playlist.
CAUTION: Servicing the DR65A3000 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.
CAPILLARY
TUBES
ACCUMULATOR
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. Fan does not run with
fan switch in either position.
12
DR90/DR120A3000 Dehumidification System 33-00298EFS—01
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.
Evaporator
coil frosted
continuously, low
de-humidifying
capacity.
Unit not providing
ventilation.
Unit removes some
water, but not as
much as expected.
Unit Test to
determine problem:
1. Loose connection in fan circuit.
2. Obstruction prevents fan rotation.
3. Defective fan.
4. Defective fan relay.
5. Defective fan capacitor.
1. Defrost thermostat loose or defective.
2. Low refrigerant charge.
3. Dirty air filter(s) or airflow restricted.
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.
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.
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.
DR90/DR120A3000 Dehumidification System 33-00298EFS—01 13
DR90 Parts List
M36841
Figure
Reference
1 Dehumidifier DR90A3000/U
2 Motorized Ventilation Damper EARD6TZ
3 Bypass Damper CPRD8
4 Filter 50070171002
Base and Accessory Parts Part Number
1
2
4
3
14
For reference only.
DR90/DR120A3000 Dehumidification System 33-00298EFS—01
Loading...