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DH70

Williams DH70, DH90, DH125 Installation, Operation And Maintenance Instructions

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Model DH70, DH90 & DH125
Dehumidifier Installation, Operation
and Maintenance Instructions
INSTALLATION BY A HVAC PROFESSIONAL IS RECOMMENDED
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: Sold by:
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TABLE OF CONTENTS
Safety Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 - 4
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
General Operation
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Unpacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Location considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Set Up Dehumidifier for Installation
Ducting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . 7
Dampers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Unit mounted Dehumidistat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Optional remote Dehumidistat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Frost Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Drain Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Float Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Leveling . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Condensate Pan, Condensate Pump and Float Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . 8
Electrical
Circuit Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Installation Options
Ducting for Stand Alone Installations or Non-Ducted Installations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Wiring the Dehumidifier to the HVAC System
Independent mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . 11
Dependent mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Ducting to HVAC System
Independent Operation mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Dependent Operation mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Basement or Attic installations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Closet installations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Start Up and Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Troubleshooting Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Service Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
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SAFETY INSTRUCTIONS READ THE INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS
CAREFULLY BEFORE INSTALLING AND 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.
CAUTION
READ ALL INSTRUCTIONS BEFORE BEGINNING INSTALLATION. USE CAUTION AND WEAR CUT RESISTANT GLOVES WHEN HANDLING SHEET METAL, CUTTING
PLENUM OPENINGS AND HANDLING DUCT WORK. SHARP EDGES MAY CAUSE SERIOUS INJURY FROM CUTS.
DEHUMIDIFIER IS HEAVY, DROPPING UNIT MAY CAUSE PERSONAL INJURY OR EQUIPMENT
DAMAGE. HANDLE WITH CARE AND FOLLOW INSTALLATION INSTRUCTIONS.
THIS UNIT IS TO BE INSTALLED INDOORS IN AN AREA PROTECTED FROM RAIN OR MOISTURE. INSTALLATION, SERVICE, AND MAINTENANCE MUST BE PERFORMED BY A QUALIFIED
SERVICE TECHNICIAN IN COMPLIANCE TO ALL LOCAL AND NATIONAL CODES. IMPROPER INSTALLATION, ADJUSTMENT, ALTERATION, SERVICE OR MAINTENANCE MAY CAUSE PROPERTY DAMAGE OR INJURY.
DO NOT USE IN OR AROUND POOL OR SPA APPLICATIONS. POOL CHEMICALS CAN DAMAGE
THE DEHUMIDIFIER.
DO NOT USE SOLVENTS OR CLEANERS ON OR NEAR THE CIRCUIT BOARD. CHEMICALS CAN
DAMAGE CIRCUIT BOARD COMPONENTS AND CAN CAUSE PROPERTY DAMAGE OR PERSONAL INJURY.
CAUTION
THIS SYMBOL MEANS IMPORTANT INSTRUCTIONS. FAILURE TO HEED THEM CAN RESULT IN INJURY OR MATERIAL PROPERTY DAMAGE.
WARNING
120 VOLTS MAY CAUSE SERIOUS INJURY FROM ELE
CTRIC SHOCK. DISC
ONNE
CT
ELE
CTRICAL POWER BEFORE STARTING INSTALLATION OR SERVICI
NG, AND LEAVE
POWER DISCONNECTED UN
TIL INSTALLATION OR SERVICE IS COMPLETED.
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CAUTION
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 A SIMILARLY QUALIFIED PERSON IN ORDER TO AVOID A HAZARD.
FOR PROTECTION OF THE COMPRESSOR, IT MUST BE TRANSPORTED AND INSTALLED IN AN
UPRIGHT POSITION. IF THE UNIT WAS SHIPPED OR STORED ON ITS SIDE, A 24-HOUR SETTLING PERIOD IN THE UPRIGHT POSITION IS REQUIRED BEFORE RUNNING THE UNIT FOR THE FIRST TIME. TEMPORARY STORAGE MUST BE INDOORS, UPRIGHT IN THE ORIGINAL CARTON, AND COMPLETELY SHIELDED FROM PRECIPITATION.
THIS APPLIANCE IS NOT INTENDED FOR USE BY PERSONS (INCLUDING CHILDREN) WITH
REDUCED PHYSICAL, SENSORY OR MENTAL CAPABILITIES, OR LACK OF EXPERIENCE OR KNOWLEDGE, UNLESS THEY HAVE BEEN GIVEN SUPERVISION OR INSTRUCTION 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
70
90
125
Unit Power Supply
120 Volts / Single Phase / 60 Hz
Minimum Branch Circuit / Max Fuse size
15 Amp
15 Amp (Single Outlet)
or 20 Amp
Rated Total Current
6.5
7.0
10.0
Dimensions
Cabinet Length:
25.25”
25.25”
24”
(includes duct collars)
31.38”
31.38”
30.25”
Cabinet Width:
14”
14”
25.25”
Cabinet Height:
15.62”
15.62”
20.75”
Weight: Pounds
81
82
128
Compressor:
Rotary Type
Watts
730
790
1190
RLA / LRA
6.7 / 42
7.15 / 32.5
10.5 / 55
Refrigerant
R410A - Oz
23
27
40.6
Fan Motor
HP / RLA
.08 HP / .60 RLA
.08 HP / .60 RLA
.12 HP / .85 RLA
Air Flow: CFM vs ESp
0” ESp (w.c.)
245
245
450
.5” ESP (w.c)
120
120
275
Filter
Washable Nylon
10.25” x 13.75”
10.25” x 13.75”
16” x 25”
Inlet Air Conditions
Dehumidification
50°F – 104°F, 40°F dew point minimum
Duct Connections
8” diameter
Drain Connection
1/2” Vinyl tubing to 3/4” MPT
Max condensate pumping height
42”
* All specifications and performance data are subject to change without notice
.
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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.
If the dehumidifier is located outside of the area where humidity control is desired, the unit can be configured to use a remote dehumidistat (purchased separately) that is located in the area where humidity control is desired. Locate the sensor where it can accurately sense the humidity of the area where control is desired.
The dehumidifier can be set up as a stand-alone unit that operates separately from the dwelling’s HVAC system. In this type of installation the dehumidifier is not ducted to the HVAC system and is used to dehumidify a specific area. This installation is typically used for basements/ crawl spaces, attics or rooms with high moisture problems.
The dehumidifier can also be set up to be inter-connected into the dwelling’s HVAC system. In this type of installation the dehumidifier is ducted to the HVAC system and used to dehumidify the area served by the dwelling’s HVAC system. When connected to the HVAC system, the dehumidifier can be configured so that the dehumidifier and the HVAC system fans will operate separately of each other (Independent Operation mode) or may be configured to require that the dehumidifier and HVAC fans operate at the same time (Dependent 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). Independent Operation mode will allow the dehumidifier to continually monitor the humidity level and operate as needed whenever the HVAC system is not running, working with the HVAC system to maintain temperature and humidity control.
In warm/hot humid climates where the HVAC runs frequently or for long periods, Dependent Operation mode is the preferred mode of operation. The long run time of the HVAC system will remove / control some of the excess humidity with the dehumidifier removing the rest. In the Dependent Operation mode, the dehumidifier will monitor the humidity level when the HVAC system fan is running and will turn on whenever the humidity level exceeds the set point, removing the excess humidity as needed.
Standalone mode: See page 10 for details.
Independent mode: See page 11 for details.
Dependent mode: See page 12 for details.
UNPACKING AND CONTENTS
Do not tip unit to remove from carton.
Open carton completely using cut line marked along bottom perimeter of carton. Remove all cardboard and inner pack from top edges and duct collars. Carefully remove unit from carton bottom and inspect for any shipping damage.
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LOCATION CONSIDERATIONS
IMPORTANT PRECAUTIONS Install Unit Indoors: The device is designed to be installed indoors in a space that is protected from rain
and flooding. Do not expose to elements. Do not use in pool or spa areas.
Location. When choosing an installation location, consider the accessibility for service, condensate drain
availability and power connection.
• When used as a stand-alone unit, avoid directing the discharge air at people.
• When the unit is to be inter-connected in the HVAC system, proper location is very important as it
will determine the overall length of the connection ducts. Locate the unit as close as possible to the indoor portion of the heating or air conditioning system. The dehumidifier may be placed above, below or level with the heating or air conditioning system.
• Allow sufficient clearance to handle the unit’s overall dimensions, with enough space to access all sides for maintenance and service, as well as the necessary return and supply ductwork to the unit.
• Allow sufficient clearance for filter removal and to prevent airflow obstruction.
• Locate the unit in an area where field wiring the control (low voltage) to the unit will be possible.
DO NOT use the dehumidifier as a bench or table. Mounting: DO NOT place the dehumidifier directly on structural building members without vibration
absorbers or unwanted noise may result. The dehumidifier may be mounted on a flat surface or suspended.
• If mounted on a flat surface, use the four rubber mounting feet provided. To minimize unwanted vibration, select a level mounting surface. Adjust the mounting feet to compensate for any surface irregularities. 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. Threaded rods or other means of suspension must be provided by the installer and must be selected based on the unit weight and in compliance with local codes.
Drain Accessibility: If a floor level drain is not located in the installation area, the condensate pump in the
unit can drain water up to 42” above the base of the unit. Limit total length of drain line to 20’ from unit.
Power: Locate the dehumidifier in an area where the cord’s length (9') easily reaches a 120 VAC electrical
outlet with a minimum of a 15 Amp circuit capacity.
Filter Access: Allow for 22” clearance for removal of filter. Filter is removable from either side of unit.  Inlet: If the air inlet is not ducted, a minimum of 6” of open space is required from the inlet opening to an
adjacent surface.
Allow for proper drainage and routing of any needed drain pipes.  It is recommended a drain pan be placed under the unit if installed above a living area or above an area
where water leakage could cause damage.
It is recommended that a backdraft damper be used in the discharge duct of the dehumidifier, especially when
connecting to the supply ducting system. The backdraft damper prevents supply air from counter flowing
through the unit when it is not operating. The dehumidifier’s location should be chosen to allow installation of
this accessory if necessary.
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