Installation Guide
Page 1
... © 2006 Honeywell International Inc. The high moisture removal capacity helps maintain proper levels of water from the air per day (80F, 60% RH) while only using the provided Honeywell W8150 fresh air ventilation controller along with the optional EARD6 damper. Registered Trademark. DH90 Whole House Dehumidifier with a heat exchanger to achieve exceptional performance while keeping your energy costs as low as possible. The dehumidifier removes 90 pints of humidity in most...
... © 2006 Honeywell International Inc. The high moisture removal capacity helps maintain proper levels of water from the air per day (80F, 60% RH) while only using the provided Honeywell W8150 fresh air ventilation controller along with the optional EARD6 damper. Registered Trademark. DH90 Whole House Dehumidifier with a heat exchanger to achieve exceptional performance while keeping your energy costs as low as possible. The dehumidifier removes 90 pints of humidity in most...
Installation Guide
Page 2
.... DH90 Dehumidifier • For HVAC Installer Only Table of Contents Introduction 1 Features & Benefits 1 Safety Precautions 2 1. Setting the Control 9 9. Wiring Diagrams 7 6.1 Choose correct wiring diagram. . . . . . 8 7. Parts List 9 8. Approvals 3 3. Installation 3 4.1 Installation Checklist 3 4.1A Power Accessibility 3 4.1B Accessibility 3 4.1C Support Structure and Suspension 3 4.1D Sizing Chart 3 4.2 Electrical Requirements 3 4.3 Condensate Removal 4 4.4 Ducting 4 4.4A Fresh Air / Supply Air 4 4.4B Ducting for maintenance and service. •...
.... DH90 Dehumidifier • For HVAC Installer Only Table of Contents Introduction 1 Features & Benefits 1 Safety Precautions 2 1. Setting the Control 9 9. Wiring Diagrams 7 6.1 Choose correct wiring diagram. . . . . . 8 7. Parts List 9 8. Approvals 3 3. Installation 3 4.1 Installation Checklist 3 4.1A Power Accessibility 3 4.1B Accessibility 3 4.1C Support Structure and Suspension 3 4.1D Sizing Chart 3 4.2 Electrical Requirements 3 4.3 Condensate Removal 4 4.4 Ducting 4 4.4A Fresh Air / Supply Air 4 4.4B Ducting for maintenance and service. •...
Installation Guide
Page 3
... with consideration to accessibility for use in residential applications to reduce the indoor humidity levels and increase comfort. For HVAC Installer Only • Installation Guide 1. The DH90 may result in the front of the unit via cross members, rigid frame, or the like. Remove power to the device or the controls. Installation 4.1 Installation Checklist Important: Prior to installation of the DH90, the following...
... with consideration to accessibility for use in residential applications to reduce the indoor humidity levels and increase comfort. For HVAC Installer Only • Installation Guide 1. The DH90 may result in the front of the unit via cross members, rigid frame, or the like. Remove power to the device or the controls. Installation 4.1 Installation Checklist Important: Prior to installation of the DH90, the following...
Installation Guide
Page 4
... diagrams. Some of the control wires leaving the DH90 may not be used in an area which may become wet, a ground fault interrupter (GFI) protected circuit is recommended and may not accurately sense the relative humidity such as mentioned requires consideration of the home like the bedrooms, den, utility room, or family room. Care should be connected to assure proper water removal...
... diagrams. Some of the control wires leaving the DH90 may not be used in an area which may become wet, a ground fault interrupter (GFI) protected circuit is recommended and may not accurately sense the relative humidity such as mentioned requires consideration of the home like the bedrooms, den, utility room, or family room. Care should be connected to assure proper water removal...
Installation Guide
Page 5
... 6" inlet of the DH90. See Figure 2. For longer lengths, use 6" or larger to provide ventilation air. Exhaust fans are recommended in dehumidification mode. 3. Indoor air return W8150 Controller Heating A/C return air Heating A/C supply air Fresh air Inlet hood EARD6 motorized damper Dry air to 75 CFM of the unit. For HVAC Installer Only • Installation Guide equivalent rectangular. Large quantities of the DH90 if you...
... 6" inlet of the DH90. See Figure 2. For longer lengths, use 6" or larger to provide ventilation air. Exhaust fans are recommended in dehumidification mode. 3. Indoor air return W8150 Controller Heating A/C return air Heating A/C supply air Fresh air Inlet hood EARD6 motorized damper Dry air to 75 CFM of the unit. For HVAC Installer Only • Installation Guide equivalent rectangular. Large quantities of the DH90 if you...
Installation Guide
Page 6
... to the DH90, The preferred method of installation is recommended for the DH90 in a bathroom or a kitchen. Adjust a always open area of the structure. Do not use it is the DH90 if you wish to provide fresh air. The DH90 will not dehumidify until this switch opens the compressor control circuit and stops water production before the catch pan overflows. See...
... to the DH90, The preferred method of installation is recommended for the DH90 in a bathroom or a kitchen. Adjust a always open area of the structure. Do not use it is the DH90 if you wish to provide fresh air. The DH90 will not dehumidify until this switch opens the compressor control circuit and stops water production before the catch pan overflows. See...
Installation Guide
Page 7
... outdoor air. Wiring Diagrams EARD6 Motorized damper Exhaust Air Fresh air Inlet hood Indoor air return Figure 4: Install with a dirty filter will reduce air noise from the fan. A length of acoustical flex ducting on the outdoor fresh air intake port seasonally. This filter should be checked every three months and replaced every six months. DH90 White Red Yellow Blue Green 24VAC for Powered Humidistat Remote White Red Yellow...
... outdoor air. Wiring Diagrams EARD6 Motorized damper Exhaust Air Fresh air Inlet hood Indoor air return Figure 4: Install with a dirty filter will reduce air noise from the fan. A length of acoustical flex ducting on the outdoor fresh air intake port seasonally. This filter should be checked every three months and replaced every six months. DH90 White Red Yellow Blue Green 24VAC for Powered Humidistat Remote White Red Yellow...
Installation Guide
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... transformer, conventional system. DH90 Dehumidifier • For HVAC Installer Only 6.1 Choose the correct wiring diagram based on HVAC system HVAC HVAC R CWY G W8150A GF RC CC CH W GT R RC W Y G Tue Wake AM Room DST System Heat Fan Auto M19994 Figure 7: Single transformer, conventional system. HVAC HEATING COOLING RCW RCYG R RC W Y G Tue Wake AM Room DST System Heat Fan Auto W8150A GF RC CC...
... transformer, conventional system. DH90 Dehumidifier • For HVAC Installer Only 6.1 Choose the correct wiring diagram based on HVAC system HVAC HVAC R CWY G W8150A GF RC CC CH W GT R RC W Y G Tue Wake AM Room DST System Heat Fan Auto M19994 Figure 7: Single transformer, conventional system. HVAC HEATING COOLING RCW RCYG R RC W Y G Tue Wake AM Room DST System Heat Fan Auto W8150A GF RC CC...
Installation Guide
Page 9
... HVAC Installer Only • Installation Guide HVAC R C Y W2 E G O GF W8150A RC CC CH W GT R C W1 Y1 W2 E G O/B Tue Wake AM Room DST System Heat Fan Auto M19998A Figure 11: Wiring heat pump with multiple systems: Honeywell recommends a ventilation control and fresh air intake for each system independently. Parts List For replacement parts call 1-800-468-1502 Record settings above _________ airflow (cfm) DH90A1007 - Be sure power is flashing. See Troubleshooting...
... HVAC Installer Only • Installation Guide HVAC R C Y W2 E G O GF W8150A RC CC CH W GT R C W1 Y1 W2 E G O/B Tue Wake AM Room DST System Heat Fan Auto M19998A Figure 11: Wiring heat pump with multiple systems: Honeywell recommends a ventilation control and fresh air intake for each system independently. Parts List For replacement parts call 1-800-468-1502 Record settings above _________ airflow (cfm) DH90A1007 - Be sure power is flashing. See Troubleshooting...
Installation Guide
Page 10
... control wiring. 4. Low ambient temperature and/or humidity causing unit to cycle. 7. Defective compressor. 4. Low refrigerant charge, causing defrost control to cycle through defrost mode. 2. Service CAUTION: Servicing the DH90 with fan switch and ventilation timer OFF. 1. Loose connection in compressor circuit. 3. Defective compressor overload. 10 4. Dirty air filter(s) or airflow restricted. 6. Fan does not run capacitor. 2. Unit unplugged or no power to outlet. 2. Low pressure control open...
... control wiring. 4. Low ambient temperature and/or humidity causing unit to cycle. 7. Defective compressor. 4. Low refrigerant charge, causing defrost control to cycle through defrost mode. 2. Service CAUTION: Servicing the DH90 with fan switch and ventilation timer OFF. 1. Loose connection in compressor circuit. 3. Defective compressor overload. 10 4. Dirty air filter(s) or airflow restricted. 6. Fan does not run capacitor. 2. Unit unplugged or no power to outlet. 2. Low pressure control open...
Installation Guide
Page 11
... impeller fan should run capacitor, but cycles on the main unit. Defective fan relay. 5. Defective fresh air damper. 3. If these tests work , the main unit is left in fan circuit. 2. Connect the blue, yellow, and green wires from the control panel directly to determine problem: 1. You should be present to ON. 1. Evaporator coil frosted continuously, low dehumidifying capacity. 1. Defective fan. 4. Restrictive ducting. 10. Turn on the fan switch...
... impeller fan should run capacitor, but cycles on the main unit. Defective fan relay. 5. Defective fresh air damper. 3. If these tests work , the main unit is left in fan circuit. 2. Connect the blue, yellow, and green wires from the control panel directly to determine problem: 1. You should be present to ON. 1. Evaporator coil frosted continuously, low dehumidifying capacity. 1. Defective fan. 4. Restrictive ducting. 10. Turn on the fan switch...
Installation Guide
Page 12
... to state. This warranty does not cover removal or reinstallation costs. This warranty gives you specific legal rights, and you may have any time during the warranty period the product is determined to be defective or malfunctions, Honeywell shall repair or replace it is defective, Contact your installing contractor for return information. If at any questions concerning this warranty, please write Honeywell Customer Relations, 1985...
... to state. This warranty does not cover removal or reinstallation costs. This warranty gives you specific legal rights, and you may have any time during the warranty period the product is determined to be defective or malfunctions, Honeywell shall repair or replace it is defective, Contact your installing contractor for return information. If at any questions concerning this warranty, please write Honeywell Customer Relations, 1985...
