Honeywell DH150 Whole House Dehumidifier Installation Guide

Honeywell DH150 Whole House Dehumidifier

Product Information

Specifications

• Product Name: TrueDRY DH150 Dehumidification System
• Manufacturer: Honeywell

FAQs

• Q: Where can I find assistance with this product?
  • A: For assistance with this product, please visit http://yourhome.honeywell.com or call Honeywell Customer Care toll-free at 1-800-468-1502.
• Q: Can the TrueDRY DH150 be installed by anyone?
  • A: No, the TrueDRY DH150 must be installed by a trained, experienced technician. Failure to follow the installation instructions can result in product damage or hazardous conditions.

About the TrueDRY DH150 Dehumidifier

• The Honeywell TrueDRY DH150 ensures the home is maintained at proper humidity levels through its high performance and efficiency.

Installation Instructions

Introduction

Must be installed by a trained, experienced technician

Read these instructions carefully. Failure to follow these instructions can damage the product or cause a hazardous condition.

• Do not install TrueDRY DH150’s exhaust end without ducting.
• TrueDRY DH150 is designed to be installed indoors in a space that is protected from rain and flooding.
• Install the unit with space to access the back or side panels for maintenance and service. Do not install with service panels inaccessible.
• 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.
• Do not use the device as a bench or table.
• To ensure quiet operation, do not place the device directly on the structural supports of the home. Provide vibration isolation to minimize noise.
• 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.

Read and save these instructions

About the TrueDRY DH150 Dehumidifier

The Honeywell TrueDRY DH150 ensures the home is maintained at proper humidity levels through its high performance and efficiency.

Benefits

• Removes up to 150 pints of water from the indoor air.
• Can be ducted for whole-house humidity control, or operate unducted to address moisture problem areas such as an attic or crawl space.
• Easy access panels makes service quick and simple.

Maintaining Ideal Humidity

Dewpoints 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 TrueDRY is installed properly, your cooling equipment may not run as much because dehumidified air feels cooler than humid air.

WHAT THE AIR FEELS LIKE

HOW HOT THE HEAT-HUMIDITY COMBINATION MAKES IT FEEL.

EXAMPLE: AIR AT 90ºF WITH 50% RH FEELS LIKE 96°F TO THE HUMAN BODY!

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. TrueDRY DH150 safeguards against excessive humidity in the home year-round.

*American Society of Heating, Refrigerating and Air Conditioning Engineers (ASHRAE).

Control Options

The TrueDRY DH150 may be used with one of the following external controls:

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 when you’re ready.

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 when you’re ready.

Manual Dehumidistat (H8908DSPST) and Automatic Ventilation Controls (W8150A1001)

• Manual humidity control with intuitive comfort settings.
• Integrated humidity chart for accurate control in changing outdoor conditions.
• Automatic W8150 ventilation control to ASHRAE industry code, or for continuous operation.

Specifications

Install TrueDRY DH150 according to National Electric Codes.

Dry-Bulb Temp| Wet-Bulb Temp| Intake Humidity| Capacity (Pints/Day)
---|---|---|---
80°F| 70°F| 60% RH| 150
70°F| 61°F| 60% RH| 116
60°F| 52°F| 60% RH| 88

Home Size (square ft)| **Dehumidifier Capacity Required to Maintain Desired Indoor RH*
---|---
60% RH Indoor (pints/day)| 50% RH Indoor (pints/day)| 40% RH Indoor (pints/day)**
2080| 49–54| 55–58| 71–78
2600| 61–68| 65–72| 90–97
3120| 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

• Product weight: 134 lbs
• Shipping weight: 164 lbs
• Shipping dimensions: 28 1/4 in. H x 42 in. W x 24 in. D
• Media Filter: MERV 11, 16 in. H x 16 in. W x 2 in. D
• Drain connection: 3/4-in. threaded female NPT connection, with attached 3/4-in. male connection.
• Duct connections: Round 10 in. and 6 in. inlets. Oval 10 in. x 4 in. outlet.
• Cabinet: 20 gauge galvanized steel powder-coat painted.
• Insulation: R value 1
• Compressor: Rotary-style
• Refrigerant: 2 lb., R-410.A
• Operating Temp Range (outside cabinet): 56ºF-95ºF (13ºC-35ºC)
• Operating Humidity Range: 0-99% RH

Airflow versus external static pressure (0–1 in. water pressure) with collars attached

Input ratings

• Electrical input voltage: 120VAC—1 Phase—60 Hz nominal
• Input current: 6.9 amps

Output ratings

• Power transformer to R/C terminals: 24VAC, 0.85A
• Energy Performance: 3.6 pints per kilowatt hour (KWH).

Standards and approval body requirements

ETL tested per UL standard 474 (ducted dehumidifier.)

Installation Instructions

Installation Checklist

Tools Required

• 3/8-in. hex drive
• Drill or duct-cutting tool
• Wire stripper/cutter
• Standard screwdriver
• Duct tape
• 8-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 (quantity 2)

Materials Provided

• Sheet metal screws (quantity 9)
• 6-in. plastic duct collar
• 10-in. plastic duct collar
• 10-in. oval x 4 in. plastic duct collar

Options

• 1/2-in. drain p-trap (may be required by local code)
• External humidity control
  • Manual deqhumidistat (H8908DSPST), Auto Ventilation (W8150A1001)
  • TrueIAQ (DG115EZIAQ)
  • VisionPRO IAQ (YTH9421C1010)

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.

Intended Application

For the ideal installation, draw air from the central part of the home and return it to isolated areas of the home like the bedrooms, den, utility room, or family room. The ductwork of the existing system can be used to supply air to the home.

Door and Collar Assembly

Door Install

• Insert tab on the bottom of the door between the foam installation and the metal side.
• Push down on the plastic door latch and swing door shut. Once the door is shut release the door latch.

Collar Install

• Remove the 2 round ducts, 1 oval duct, 3 seals and small bag of mounting hardware from inside the rectangle opening.
• Adhere seals onto the back of each duct and mount the ducts to the front of the dehumidifier using screws provided.

Ducting: Install to Fit Your Application

Flex duct is recommended in connecting to the TrueDRY DH150 collars to reduce vibration noise.

Duct Sizing: For total duct lengths, use round or rectangular duct sized accordingly:

• 10-inch for less than 25-ft
• 12-inch for more than 25-ft

For the optional fresh air ventilation port, use round insulated duct sized accordingly:

• 6-inch round for lengths of less than 50-ft.
• 8-inch round for lengths greater than 50-ft, or if more than 100-cfm is required

TrueDRY DH150 can be ducted into the central forced air system, or operate as a stand-alone in designated, high-humidity zones within the home, such as a basement or crawl space.

Electrical requirements

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

Main Return to Main Return

Ideal when…

• Running TrueDRY DH150 with A/C operation.
• Minimizing discharge air temperature (DAT) increase is preferred.
• Space dictates.

Main Return to Main Supply

Ideal when…

• Running TrueDRY DH150 opposite A/C operation. Running with A/C operation requires damper on the exhaust port to minimize backdraft when TrueDRY DH150 is not on but A/C is.
• Minimizing DAT increase is preferred.
• Space dictates.

Dedicated Return to Main Supply

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 TrueDRY DH150 is not on but A/C is.
• Minimizing DAT increase is preferred.

Dedicated Return to Main Return

Ideal when…

• Running TrueDRY DH150 with A/C operation.
• Drying a specific area of the house.
• Minimizing DAT increase is preferred.

Plumbing

• Connect 1/2-in. 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. Route to drain with a trap if possible.
• Place TrueDRY DH150 on supports that raise the base above the top flanges on the drain pan beneath it. Raising it will optimize drain flow by gravity.

Terminal Descriptions

A four-block wiring terminal is located on the sloped end of TrueDRY DH150.

Note: Outer screws secure block to TrueDRY DH150. Not for wiring.

• DHUM: Compressor and fan operation for dehumidification.
• R: 24V hot
• FAN: Fan activation only for ventilation.
• C: 24V common

CAUTION: Low-voltage Hazard.

• Can cause equipment damage.
• Disconnect HVAC equipment before beginning installation.

Ducting to Oval Outlet

• Bend 10 in. round flex duct to fit over the DH150 oval outlet.

Wiring

Wire the TrueDRY DH150 according to the diagram that applies to your desired operation

Follow this diagram for ducted operation with an external humidity control

For ducted operation with external humidity and ventilation control, follow this diagram

Follow this diagram if using TrueDRY DH150 with a powered dehumidistat such as TrueIAQ (DG115EZIAQ)

1. IF A THERMOSTAT OTHER THAN A TH5110, TH5220, TH5320, TH6110, TH6220, TH6320, TH8110, TH8320, OR TH8321 IS USED, A RELAY MAY BE REQUIRED TO ISOLATE THE G WIRE.
2. PROGRAM ISU SETTING 60 TO Ø TO FORCE SYSTEM FAN ON WITH DEHUMIDIFICATION CALL.

Follow this diagram if using TrueDRY DH150 with VisionPRO IAQ

Checkout

Apply power to TrueDRY DH150. Turn the humidity control to a low RH% level to initiate a humidity call. Confirm that the TrueDRY DH150 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 this back down (or off) when checkout is complete. Turning the humidity control to Off will turn TrueDRY DH150 off.

Maintenance

Cleaning

1. Unplug TrueDRY DH150 before beginning service. Push down the door release and pull. The filter can be removed from either side.
2. Grip filter tab at bottom to remove. Replace with new filter.
3. Using a 1/2-in. hex drive or standard screwdriver, remove the eight screws on either side of the TrueDRY DH150. The side and top panels can then be removed. Using a damp cloth, wipe excess dust and debris from blower, refrigerant coils, and compressor  coils. Reattach panels and collars when finished.
4. 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.
5. When service is complete, initiate a call for dehumidification and check that the compressor and fan activate. If using the digital VisionPRO IAQ or TrueIAQ controls, reset maintenance reminders.

Technical Description

TrueDRY DH150 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 strainer 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.

The mixture of gas and liquid refrigerant enter the accumulator after leaving the evaporator coil. The accumulator prevents any liquid refrigerant from reaching the compressor. The compressor evacuates the cool refrigerant gas from the accumulator and compresses it to a high pressure and temperature to repeat the process.

Troubleshooting

CAUTION: Servicing the TrueDRY DH150 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.

No dehumidification, neither impeller fan nor compressor run with fan switch and ventilation timer 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.       Low pressure Control open.

7.       Optional Condensate Pump Safety Switch open.

No dehumidification, compressor does not run but impeller fan runs with fan switch and ventilation timer OFF and humidity control turned to ON.| 1. Defective compressor run capacitor.

2.       Bad connection in compressor circuit.

3.       Defective compressor overload.

4.       Defective compressor.

5.       Defrost thermostat open.

Impeller fan runs with fan switch and ventilation timer OFF, but compressor cycles on & off.| 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.

Impeller fan does not run with fan switch in either position. Impeller fan does not run with ventilation timer activated. Compressor runs briefly but cycles on & off with humidity control turned to ON.| 1.       Loose connection in impeller fan circuit.

2.       Obstruction prevents impeller fan rotation.

3.       Defective impeller fan.

4.       Defective impeller fan relay.

5.       Defective impeller fan capacitor.

---|---
Impeller fan runs with fan switch ON. Impeller fan does not run with ventilation timer activated.| 1.       Defective ventilation timer.

2.       Time not correct on ventilation timer.

3.       Ventilation timer set to manual & switched OFF.

4.       Defective fan switch.

The evaporator coil frosted continuously, low dehumidifying capacity.| 1. Defrost thermostat loose or defective.

2.       Low refrigerant charge.

3.       Dirty air filter(s) or airflow restricted.

4.       Excessively restrictive ducting connected to unit.

Unit not providing ventilation. Ventilation timer not operating correctly.| 1. If timer is not functioning correctly reset timer and reprogram.

2.       Check control wire connections (check connections at fresh air damper also).

3.       Defective fresh air damper.

4.       Defective fan switch.

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.             Air filter dirty.

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.

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.

Impeller Fan Replacement

The motorized impeller fan is a unitary assembly consisting of the motor and impeller fan. If defective, the complete assembly must be replaced.

1. Unplug the power cord.
2. Remove the cabinet access panel.
3. Remove the screw attaching the impeller fan support bracket to the base.
4. Disconnect the impeller fan leads inside the electric box.
5. Remove fan/bracket assembly by removing 3 screws from the bracket and inlet ring assembly.
6. Remove the defective impeller fan from the bracket and replace with it with the new impeller fan.
7. Reassemble the new impeller fan by reversing the above procedure. Note: There are two pins on the backside of the cabinet that must align with the two holes in the impeller fan support bracket.

Compressor/Capacitor Replacement

• This compressor is equipped with a two terminal external overload and a run capacitor, but no start capacitor or relay

Checking Compressor Motor Circuits

Perform the following tests if the impeller fan runs but the compressor does not with the fan switch and ventilation timer OFF and the humidity control ON.

1. Unplug the unit; remove the cabinet side and the electrical connection cover on the compressor top.
2. Plug in the unit and turn the humidity control to ON. Check for 110 volts from compressor terminal R to overload terminal 3 using an AC voltmeter. If voltage is present, go to step 3. If no voltage, there may be a loose connection in the compressor circuit. Test each component for continuity. See the appropriate section if a defect is suspected.
3. Unplug the unit, and then disconnect the red and yellow wires from compressor terminals R & S. Using an ohmmeter check continuity between the points listed below.
4. Compressor terminals C and S: No continuity indicates an open start winding. The compressor must be replaced. Normal start winding resistance is 3 to 7 ohms.
5. Compressor terminals C and R: No continuity indicates an open run winding. The compressor must be replaced. Normal run winding resistance is .5 to 2 ohms.
6. Compressor terminal C and overload terminal 1: No continuity indicates a defective overload lead.
7. Overload terminals 1 and 3: If there is no continuity, the overload may be tripped. Wait 10 minutes and try again. If there is still no continuity, it is defective and must be replaced.
8. Compressor terminal C and compressor case: Continuity indicates a grounded motor. The compressor must be replaced.
9. Disconnect the wires from the run capacitor. Set the ohmmeter to the Rx1 scale. The capacitor is shorted and must be replaced if continuity exists across its terminals. If there is no needle movement with the meter set on the Rx100000 scale, the capacitor is open and must be replaced.
10. Reconnect the wires to the compressor and capacitor. Plug in and turn on the unit. If the compressor fails to start, replace the run capacitor.
11. If the unit still does not start, adding a hard-start kit (relay & capacitor) will provide greater starting torque. If this doesn’t work, the compressor has an internal mechanical defect and must be replaced.

Replacing a Burned Out Compressor

The refrigerant and oil mixture in a compressor is chemically very stable under normal operating conditions. However, when an electrical short occurs in the compressor motor, the resulting high temperature arc causes a portion of the refrigerant oil mixture to break down into carbonaceous sludge, a very corrosive acid, and water. These contaminants must be carefully removed otherwise even small residues will attack replacement compressor motors and cause failures. The following procedure is effective only if the system is monitored after replacing the compressor to insure that the clean up was complete.

1. This procedure assumes that the previously listed compressor motor circuit tests revealed a shorted or open winding.
2. Remove and properly dispose of the system charge. DO NOT vent the refrigerant or allow it to contact your eyes or skin.
3. Remove the burned out compressor. Use rubber gloves if there is any possibility of contacting the oil or sludge.
4. To facilitate subsequent steps, determine the type of burn out that occurred. If the discharge line shows no evidence of sludge and the suction line is also clean or perhaps has some light carbon deposits, the burn out occurred while the compressor was not rotating. Contaminants are therefore largely confined to the compressor housing. A single installation of liquid and suction line filter/driers will probably clean up the system. If sludge is evident in the discharge line, it will likely be found in the suction line. This indicates the compressor burned out will running. Sludge and acid have been pumped throughout the system. Several changes of the liquid and suction filter/driers will probably be necessary to cleanse the system.
5. Correct the system fault that caused the burn out. Consult the factory for advice.
6. Install the replacement compressor with a new capacitor and an oversized liquid line filter. In a running burn out, install an oversized suction line filter/drier between the accumulator and compressor. Thoroughly flush the accumulator with refrigerant to remove all trapped sludge and to prevent the oil hole from becoming plugged. A standing burn out does not require a suction line filter/drier.
7. Evacuate the system with a good vacuum pump and accurate vacuum gauge. Leave the pump on the system for at least an hour.
8. Operate the system for a short period of time, monitoring the suction pressure to determine that the suction filter is not becoming plugged. Replace the suction filter/drier if pressure drop occurs. If a severe running burn out has occurred, several filter/driers may have to be replaced to remove all of the acid and moisture.

NOTE: NEVER use the compressor to evacuate the system or any part of it.

Replacing a Compressor, Non-Burnout

Remove the refrigerant from the system. Replace the compressor and liquid line filter/drier. Charge the system to 50 PSIG and check for leaks. Remove the charge and weigh in the refrigerant quantity listed on the nameplate. Operate the system to verify performance.

Defrost Thermostat

The defrost thermostat is attached to the refrigerant suction tube between the accumulator and the compressor. It will automatically shut the compressor off if the low side refrigerant temperature drops due to excessive frost formation on the evaporator coil. The impeller fan will continue to run, causing air to flow through the evaporator coil and melt the ice. When the ice has melted, the evaporator temperature will rise and the thermostat will restart the compressor.

Parts List

Limited Warranty

5-Year Limited Warranty

Honeywell warrants this product 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

1. return it, with a bill of sale or other dated proof of purchase, to the place from which you purchased it; or
2. 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.

Contact

Automation and Control Solutions

• Honeywell International Inc.
• 1985 Douglas Drive North Golden Valley, MN 55422
• http://yourhome.honeywell.com

Honeywell Limited-Honeywell Limitée

• 35 Dynamic Drive
• Toronto, Ontario M1V 4Z9

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

® U.S. Registered Trademark.
© 2008 Honeywell International Inc.

Printed in U.S.A. on recycled paper containing at least 10% post-consumer paper fibers.

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