Table of Contents
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Model DH70, DH90 & DH125
Dehumidifier Installation, Operation
and Maintenance Instructions
INSTALLATION BY A HVAC PROFESSIONAL IS RECOMMENDED
This whole house dehumidifier can be used to control humidity in a
single area (standalone) or integrated into the heating and cooling
system to provide comfort, health and property protection.
READ AND SAVE THESE IMPORTANT
SAFETY INSTRUCTIONS
HVAC Installer: Please Leave Manual for Homeowner
Serial No:
Install Date:
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Table of Contents
Summary of Contents for Williams DH70
- Page 1 Model DH70, DH90 & DH125 Dehumidifier Installation, Operation and Maintenance Instructions INSTALLATION BY A HVAC PROFESSIONAL IS RECOMMENDED This whole house dehumidifier can be used to control humidity in a single area (standalone) or integrated into the heating and cooling system to provide comfort, health and property protection.
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Page 2: Table Of Contents
TABLE OF CONTENTS Safety Instructions ..............3 - 4 Specifications . -
Page 3: Safety Instructions
SAFETY INSTRUCTIONS READ INSTALLATION, OPERATION MAINTENANCE INSTRUCTIONS CAREFULLY BEFORE INSTALLING OPERATING THIS DEVICE. PROPER ADHERENCE TO THESE INSTRUCTIONS IS ESSENTIAL TO OBTAIN MAXIMUM BENEFIT FROM YOUR WHOLE HOUSE DEHUMIDIFIER. WARNING THIS SYMBOL MEANS IMPORTANT INSTRUCTIONS. FAILURE TO HEED THEM CAN RESULT IN SERIOUS INJURY OR DEATH. -
Page 4: Specifications
CONCERNING THE 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. SPECIFICATIONS DH70 DH90 DH125 Capacity: Pints per day @ 80° F DBT / 60% RH... -
Page 5: General Operation
GENERAL OPERATION The function of your dehumidifier is to reduce the indoor humidity levels and increase comfort. It is a high capacity dehumidifier able to remove up to 125 pints of water per day (80° F DBT / 60% RH). An internal humidity sensor (dehumidistat) senses when the relative humidity (RH) is above the set point (example: 50% RH) and signals the dehumidifier to operate until the relative humidity level has been lowered to the set point. -
Page 6: Location Considerations
Make certain that the unit is sitting on all four mounting feet. • To suspend the unit, a separate hanger kit (HD18 for the DH70 or DH90 models, HD19 for the DH125 model, or suitable alternative) is required. This kit consists of two brackets and four rubber isolators. -
Page 7: Set Up Dehumidifier For Installation
If necessary, the outlet duct collar may be moved to the top of the unit for vertical discharge of the airflow. For the DH70 & DH90, remove the screws and swap the top panel with the outlet duct collar panel, the panels are interchangeable. -
Page 8: Frost Control
DRAIN INSTALLATION The DH70, DH90 and DH125 units use an internal condensate pump to drain the water that is removed from the air. The pump will operate as needed, which may be frequently if the air is more humid than normal or less frequently if drier. -
Page 9: Electrical
Canada Installations: Make all electrical connections in accordance with the current edition of the Canadian Electrical Code CSA C22 .1 and any local codes or ordinances that may apply. ELECTRICAL SPECIFICATIONS Model DH70 & DH90 Model DH125 Voltage / Freq. / Phase... -
Page 10: Installation Options
Installation Options STAND ALONE OR NOT DUCTED TO HVAC SYSTEMS In this installation the dehumidifier is not ducted to the HVAC system and is used to dehumidify a specific area. This installation is typically used in basements, attics or crawl spaces. Optional Components 8”... -
Page 11: Wiring The Dehumidifier To The Hvac System Independent Mode
DUCTED TO HVAC SYSTEMS - Independent Operation The dehumidifier is installed so that the dehumidifier and the central heating or air conditioning system fans operate separately of each other (Independent Operation) Duct Connections. In this arrangement, the dehumidifier is connected across or in parallel with the heating or air conditioning system. -
Page 12: Dependent Mode
DUCTED TO HVAC SYSTEMS - Dependent Operation Duct Connections. In this arrangement, the dehumidifier is connected either upstream or downstream of the heating or air conditioning system. Both the discharge and the return of the dehumidifier are connected to the same side of the system. -
Page 13: Independent Operation Mode
DUCTING TO HVAC SYSTEM – BASEMENT OR ATTIC INSTALLATIONS Independent Operation Mode In cool damp climates, where the HVAC system runs infrequently or for short periods, Independent Operation mode is the preferred mode of operation. The short cycle times of the HVAC system, while keeping the temperature in control, does not effectively control the humidity level (not enough time to remove the excess humidity from the dwelling). -
Page 14: Closet Installations
DUCTING TO HVAC SYSTEM – CLOSET INSTALLATIONS The dehumidifier in these applications is typically installed under or next to the HVAC equipment. In both types of installation, the dehumidifier inlet is not ducted and pulls air from the living space through a grille or louvers in the HVAC closet door. -
Page 15: Troubleshooting Guide
TROUBLESHOOTING Troubleshooting Guide Symptom Possible Reason Possible Solution (some solutions may require professional service) Verify there is power to the receptacle (plug in another device, i.e., lamp). No power to unit Check that the circuit breaker has not tripped / fuse has blown. Dehumidifier does ... -
Page 16: Service Parts
SERVICE PARTS DH70/DH90 Part Description Part Part Description Part No. Control System - DH70, DH90 DHCS Compressor Rubber Grommet (3) DHCR Motor Capacitor 250V, 8µF, 50/60 Hz DHMC 61/62 Motor Assembly DHMT Compressor Capacitor 250V, 35µF, 50/60Hz DHCC Humidity Probe... - Page 17 SERVICE PARTS DH125 Part Description Part Part Description Part No. Rubber Feet (4) DHFR 46/47 Motor Assembly DHMR Filtration Net DHFL Compressor DH125 DHCE Water Pump 115V, 60Hz DHWP Compressor Rubber Grommet (3) DHCB Water Level Sensor DHWT Filter DHFI Humidity Probe DHHP Capillary...
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Page 18: Wiring Diagram
WIRING DIAGRAM... - Page 19 SERVICE RECORD Date Maintenance Performed Components Required...
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Page 20: Warranty
Warranty Full (One Year) Parts Warranty. All parts of the dehumidifier are warranted to be free from defects for one year from the date of purchase by the original consumer when installed per the installation instructions and in accordance with all local, state, and national codes for normal residential use. Transportation, handling, and labor costs to diagnose, repair or replace such defective parts are not covered by this limited parts warranty and are the owner's responsibility.
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