Honeywell DR90A3000, DR120A3000 Installation Manual

DR90/DR120A3000

PROFESSIONAL INSTALLATION GUIDE

GUIDE D’INSTALLATION PROFESSIONNELLE

GUÍA DE INSTALACIÓN PROFESIONAL

INCLUDED IN THIS BOX

B C E

A1

A2

(or)

D

	G	OPTIONAL CONTROLS SOLD SEPARATELY
F
	DR90/DR120A3000
	PROFESSIONAL INSTALLATION GUIDE
	GUIDE D’INSTALLATION PROFESSIONNELLE
	GUÍA DE INSTALACIÓN PROFESIONAL
	INCLUDED IN THIS BOX
	G1	G2	G3	G4	G5

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

A1 A2 B C D E F G1 G2 G3 G4

G5

DR90A3000 (1) or DR120A3000 (1) 10” duct collar (2) 6” duct collar (1)

MERV 11 Filter (1) Filter Door (2) Installation Guide Prestige IAQ Kit TruelAQ

H8908 Manual Dehumidistat VisionPRO or Prestige Thermostat

H6062 HumidiPRO Digital Humidity Control

33-00298EFS-01

Installation Checklist

Included in This Box

A1 DR90A3000 (1) or

A2 DR120A3000 (1)

B10” duct collar (2)

C6” duct collar (1)

DMERV 11 Filter (1)

EFilter Door (2)

FInstallation 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

•18-22gauge,5bandthermostat 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)

BCollet de conduite de 10 po [25,4 cm] (2)

CColletdeconduitede6po[15,2cm]

(1)

DFiltre MERV 11 (1)

ETrappe du filtre (2)

FGuide 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 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)

•Adaptateur mâle 3/4 po NPT vers conduite de vidange (diamètre de 1/2 po recommandé)

Options

•Siphon-P de vidange d’1/2 po [1,3 cm] (peut-être requis par le code local)

•Bac de récupération

•Flotteur ou capteur d’eau

Lista de verificación para la instalación

Esta caja incluye

A1 DR90A3000 (1) o

A2 DR120A3000 (1)

BAnillo para conductos de 10 pulgadas [25,4 cm] (2)

CAnillo para conductos de 6 pulgadas [15,2 cm] (1)

DFiltro MERV 11 (1)

EPuerta del filtro (2)

FGuía 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	Advertencia: La instalación la debe realizar
effectuée par un technicien d’entretien	un técnico de reparación calificado y debe
qualifié et conformément aux codes locaux	cumplir con los códigos locales.
en vigueur.	Retire la fuente de energía del dispositivo antes de
Couper l’alimentation vers l’appareil avant	instalar o reparar el dispositivo.
d’installer ou de réparer cet appareil.	Si no conecta el dispositivo según estas
Un raccordement de cet appareil non	instrucciones, el dispositivo o los controles se
conforme à ces instructions peut entraîner	pueden dañar.
des dommages à l’appareil ou aux	LAS INSTRUCCIONES DE INSTALACIÓN
commandes.	COMIENZAN EN LA PÁGINA 38
INSTRUCTIONS D’INSTALLATION
COMMENCENT À LA PAGE 22

DR90/DR120A3000

ABOUT YOUR DEHUMIDIFIER				MAINTENANCE
About the DR90/DR120A3000 Dehumidifier.	.	. . 2		Cleaning .. . . . . . . . . . . . . . . . . . . . . 11
Control Options. . . . . . . . . . . . . . . .	.	.	. 3	Technical Description. .	. . .	. .	. .	. . . . . . 12
DR90 Specifications. . . . . . . . . . . . . .	.	.	4	Troubleshooting . . . . .	. . .	. .	. .	. . . . . .12
DR120 Specifications.. . . . . . . . . . . . .	.	.	5	DR90 Parts List. . . . .	. . . . .		. . . .		. . . . 14
				DR120 Parts List. . . . . . .	. . . . . .	. . .	.		15
INSTALLATION				5-Year Limited Warranty.	. . .	. .	. .	. .	. . . .16
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.

•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.

!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 1-800-468-1502.1. Never operate a unit with a damaged power cord. If the power cord is damaged it must be

Read and save these instructions.

® U.S. Registered Trademark. Patents pending. Copyright © 2017 Honeywell International Inc. All rights reserved.

DR90/DR120A3000 Dehumidification System 33-00298EFS—01

1

About the DR90/DR120A3000 Dehumidifier

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	DR120	DR90
	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.

MCR36852

Ideal humidity is defined by industry experts* as being between 40-60% on an average annual basis.

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)
			5		10		15		20		25		30		35		40		45		50		55		60		65		70		75		80		85		90		95		100
		0
TEMPERATUREAIR FAHRENHEIT)(DEGREES	100	91	93		95		97		99		101		104		107		110		115		120		126		132		138		144
	95	87	88		90		91		93		94		96		98		101		104		107		110		114		118		124		130		136
	90	83	84		85		86		87		88		90		91		93		95		96		98		100		102		106		109		113		117		122
	85	78	79		80		81		82		83		84		85		86		87		88		89		90		91		93		95		97		99		102		105		108
	80	73	74		75		76		77		77		78		79		79		80		81		81		82		83		85		86		86		87		88		89		91
	75	69	69		70		71		72		72		73		73		74		74		75		75		76		76		77		77		78		78		79		79		80
	70	64	64		65		65		66		66		67		67		68		68		69		69		70		70		70		71		71		71		71		71		72

EXTREME DANGER DANGER EXTREME CAUTION CAUTION

SOURCE: TEMPERATURE - HUMIDIY INDEX WAS DERIVED BY R.G. STEADMAN, JOURNAL OF APPLIED METEOROLOGY, JULY 1979.

M27328

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).

ASHRAE RECOMMENDED WINTER DESIGN LEVEL								OPTIMUM
								ZONE
BACTERIA
VIRUSES
FUNGI
MITES
RESPIRATORY
INFECTIONS
ALLERGIC RHINITIS
AND ASTHMA
CHEMICAL
INTERACTIONS
OZONE
PRODUCTION
0	10		20		30		40	50		60		70		80		90		100

MCR24780

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.

•Wi-Fi™ or RedLINK™ Wireless technology

HumidiPRO Digital Control

•Manual dehumidification control

•Dehumidifier compressor protection

•RH% and outdoor temperature calibration

•Adjustable high and low range stops (10-90%)

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

Install DR90A3000 according to National Electric Codes.

Dry-Bulb 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	Dehumidifier Capacity Required to Maintain Desired Indoor RH*
(square ft [m])
		60% RH Indoor			50% RH Indoor		40% RH Indoor
		(pints/day)			(pints/day)		(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.

Dimensions in inches and (mm):

14-3/8	3-3/16			25-13/16	3-3/16
(365)	(81)			(656)	(81)

19-3/8

(492)

M28840A

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: R-410A, 25 oz

Operating Temp Range (outside cabinet):

34ºF to 135ºF (1.1ºC to 57.2ºC)

Operating Humidity Range: 0-99% RH

Airflow versus external static pressure (0–1 in. [0 - 25.4 mm] water pressure) with collars attached

0 in. (0 mm)	320 CFM
0.2 in. (5 mm)	280 CFM
0.4 in. (10 mm)	260 CFM
0.6 in. (15.2 mm)	215 CFM

Input ratings

•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

Install DR120A3000 according to National Electric Codes.

Dry-Bulb 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	Dehumidifier Capacity Required to Maintain Desired Indoor RH*
(square ft [m])
		60% RH Indoor			50% RH Indoor		40% RH Indoor
		(pints/day)			(pints/day)		(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.

Dimensions in inches and (mm):

14-3/8	3-3/16	25-13/16	3-3/16
(365)	(81)	(656)	(81)
19-3/8	21
	(533)
(492)
			M33292

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: R-410A, 30 oz

Operating Temp Range (outside cabinet):

34ºF to 135ºF (1.1ºC to 57.2ºC)

Operating Humidity Range: 0-99% RH

Airflow versus external static pressure (0–1 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
0.6 in. (15.2 mm)	250 CFM

Input ratings

•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

Flex duct is recommended in connecting to the DR90/DR120A3000 collars to reduce vibration noise.

DR120	DR90

MCR36852

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 2-3 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.

Electrical requirements:

115 VAC outlet. Ground fault interrupter (GFI) recommended.

Dedicated Return to Main Supply

A	AIR HANDLER
	RETURN	SUPPLY
	DEHUMIDIFIER
	SEPARATE
	RETURN
		(OPTIONAL)
	BACKDRAFT	GRAVITY DAMPER
	DAMPER	M36843

M24745

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

Main Return to Main Supply
B	AIR HANDLER
RETURN	SUPPLY

DEHUMIDIFIER

BACKDRAFT

DAMPER

M36844

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.

6	DR90/DR120A3000 Dehumidification System 33-00298EFS—01

Install to Fit Your Application (continued)

C

D

Main Return to Main Return

AIR HANDLER

RETURN

SUPPLY

DEHUMIDIFIER

M36845

Dedicated Return to Dedicated Supply

DEHUMIDIFIER

SEPARATE

RETURN

SUPPLY

M36846

Ideal when…

•Running DR90/DR120A3000 with A/C operation.

•Minimizing discharge air temperature (DAT) increase is preferred.

•Access to a dedicated return is not possible.

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 forced air HVAC system.

Plumbing

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

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.

HVAC

R C W Y G

Follow this diagram if using the Prestige thermostat.

W
W2		C
Y		Rc
Y2	THERMOSTAT	R
G		H
		H
K		DH
		DH	DEHUMIDIFIER

+	+
FLOAT DHUM R	FAN C
NOTE: THERMOSTAT MUST BE CONFIGURED TO DRIVE FURNACE FAN
DURING DEHUMIDIFICATION CALL.	M36853

8	DR90/DR120A3000 Dehumidification System 33-00298EFS—01

Wiring (continued)

Follow this diagram if using the HumidiPro Digital Humidity Controller.

	C	24 VAC
		(CONSTANT)
	R
	U
	U
	S
	S

Float DHUM R Fan C

M34595

HVAC

MECHANICAL

DEHUMIDISTAT

R C W Y G

DRY

CONTACTS

Follow this diagram for ducted operation with an external humidity control.

DPDT RELAY, 2.6A

Follow this diagram for ducted operation with external humidity and ventilation control.

R Rc W Y G	+	+
	FLOAT FLOAT DHUM R FAN	C

				THERMOSTAT		DEHUMIDIFIER
						M36854
		HVAC				AT120
						EARD6TZ
R	C	W	Y	G	R	MECHANICAL
						DEHUMIDISTAT
					C	DRY
				G	W8150A
				R	DAMPER	CONTACTS
				C
				C	AUX
				W		DPDT
				G	REMOTE	RELAY,
						2.6A
R	Rc W		Y	G

+

+

FLOAT DHUM R FAN C

THERMOSTAT

DEHUMIDIFIER

M36855

DR90/DR120A3000 Dehumidification System 33-00298EFS—01

9

Wiring (continued)

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.

			THERMOSTAT
			1
			R Rc C		W	Y	G		HVAC
		R							R
	TrueIAQ	C							C
		SENSOR	OUTDOOR						W
		SENSOR	SENSOR						Y
			(PROVIDED)
	In	SWITCH							G
	6840%
	7655%
	Out
2	12:15	W
		G
		VENT							EARD6TZ
		VENT
		DEHUM
		DEHUM
		HUM							DEHUMIDIFIER
		HUM	+					+
			FLOAT	DHUM R			FAN	C

1IF 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.

2PROGRAM ISU SETTING 60 TO Ø TO FORCE SYSTEM FAN ON WITH DEHUMIDIFICATION CALL.

M36856

EQUIPMENT INTERFACE MODULE (EIM)

D-1				FAN
R-2				FURNACE BOARD
C-3	1	CONV.	HP	C
				HEAT 1 RELAY
VISIONPRO IAQ	2	W1	O/B
	3	W2	AUX	HEAT 2 RELAY
	C	W3	AUX2	HEAT 3 RELAY
		Y	Y	COOL 1 RELAY
	RC	Y2	Y2	COOL 2 RELAY
				G
	RH	G	G	FAN RELAY
+
FLOAT	H1
FLOAT	U
	M2
DHUM	D1	OR
R
	M2
FAN	V1
C	N
	T2
+
			EARD6TZ
DEHUMIDIFIER
				M36857

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 holding compressor in place.

This strap is only used for shipping.

If using for ventilation, initiate 3 a call for ventilation. Confirm that the DR90/DR120A3000

fan turned on, but that the compressor remained off.

Apply power to DR90/

2 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 DR120A3000

before beginning service. Remove the magnetic filter door.

Remove cover on output side of dehu- 3 midifier. Using a damp cloth, remove

excess dust and debris from blower and internal cabinet. Reattach cover when finished.

Remove filter 2 and replace

with new filter.

Check the drain connection and drain 4 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 compressor and fan activate. If using the VisionPRO IAQ or TrueIAQ controls, reset

maintenance reminders.

DR90/DR120A3000 Dehumidification System 33-00298EFS—01

11

Technical Description

DR90/DR120A3000 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.

	STRAINER/FILTER	COMPRESSOR
	DRIER

CONDENSER

CAPILLARY

TUBES

EVAPORATOR

ACCUMULATOR

M27404

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.

	Problem	Recommended Troubleshooting Steps
	No dehumidification. Neither	1.	Unit unplugged or no power to outlet.
	fan nor compressor run and the	2.	Humidity control set too high or defective.
	ventilation timer is OFF.	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	1.	Defective compressor run capacitor.
	does not run but fan runs when	2.	Bad connection in compressor circuit.
	there is a call for dehumidification	3.	Defective compressor overload.
	and the ventilation control is OFF.	4.	Defective compressor.
		5.	Defrost thermostat open.
		6.	Optional Condensate Pump Safety Switch open.
	Fan runs when there is a call	1.	Low ambient temperature and/or humidity causing unit to cycle
	for dehumidification and the		through defrost mode.
	ventilation control is OFF, but the	2.	Defective compressor overload.
	compressor cycles on and off too
		3.	Defective compressor.
	frequently.
		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	1.	Loose connection in fan circuit.
	with ventilation	2.	Obstruction prevents fan rotation.
	activated.	3.	Defective fan.
	Compressor runs
		4.	Defective fan relay.
	briefly but cycles on
	& off with humidity	5.	Defective fan capacitor.
	control turned to
	ON.
	Evaporator	1.	Defrost thermostat loose or defective.
	coil frosted	2.	Low refrigerant charge.
	continuously, low	3.	Dirty air filter(s) or airflow restricted.
	de-humidifying
	capacity.
	Unit not providing	1.	Check control wire connections (check connections at fresh air damper also).
	ventilation.	2.	Defective fresh air damper.
		3.	Dirty air intake. Clean outside intake hood.
	Unit removes some	1.	Air temperature and/or humidity have dropped.
	water, but not as	2.	Humidity meter and or thermometer used are out of calibration.
	much as expected.	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	1.	Detach field control wiring connections from main unit.
	determine problem:	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

Figure	Base and Accessory Parts	Part Number
Reference
1	Dehumidifier	DR90A3000/U
2	Motorized Ventilation Damper	EARD6TZ
3	Bypass Damper	CPRD8
4	Filter	50070171-002

1

2 3

4

M36841

For reference only.

14	DR90/DR120A3000 Dehumidification System 33-00298EFS—01