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                        INSTALLER’S & OWNER’S MANUAL
HVAC INSTALLER: PLEASE LEAVE MANUAL FOR HOMEOWNER
P/N 4025700  •  Serial No.___________________________
The Ultra-Aire 90H dehumidifier performs multiple functions in 
Fresh Air Ventilation (optional) 
a compact enclosure; high-capacity dehumidification, fresh air 
Fresh air may be ducted to the unit and regulated by a variety of 
ventilation, and particulate filtration. 
controls in order to provide desired ventilation rates. 
Dehumidification 
Air Filtration 
The h
                    
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                        TABLE OF CONTENTS Introduction  .............................................................................1 4.9A Setting the Time  ....................................................9 Features & Benefits  .................................................................1 4.9B Ventilation Schedule  ..............................................9 Safety Precautions  ...................................................................3 4.9C Automatic or Manual Mode  .............................
                    
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                        SAFETY PRECAUTIONS 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 Ultra-Aire 90H indoor air quality system.  READ AND SAVE THESE INSTRUCTIONS  •  The device 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. DO N
                    
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                        FOR HVAC INSTALLER ONLY n 4 .1C Low Voltage Wiring  1. I ntended Application for Ultra-Aire 90H  Unit location should be in an area where field wiring the remote  For the ideal installation, draw air from the central part of the home  controls (low voltage) to the unit will be possible.  and return it to isolated areas of the home like the bedrooms, den,  utility room, or family room. The ductwork of the existing heating  n 4 .1D Back-Draft Damper  system can be used to supply air to the home.  
                    
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                        FOR HVAC INSTALLER ONLY remote location when the water level in the pump’s reservoir rises  to close the float switch. The pump also contains a safety float  IMPORTANT  switch. The white leads from this switch extend from beneath the  Do not install the control panel where it may not accurately  pump cover. This switch should be installed in series with the field  sense the relative humidity such as near HVAC supply  wire that connects the blue (#5) lead from the UA-90H to the the  registers, ne
                    
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                        FOR HVAC INSTALLER ONLY Isolated Areas: Effective dehumidification may require that ducting In cold climates or areas where the outdoor dew point is low at  be branched to isolated, stagnant air flow areas. Use 8" or larger times, ventilation can be used to dehumidify the structure, making  diameter branch ducting to each of two or three areas, use 6" or the UA-90H capable of year-round drying. This is accomplished  larger to each of four or more areas. Provisions must be made to by bringing the
                    
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                        FOR HVAC INSTALLER ONLY Crawlspace Installation: Install a separate return for the UA-90H  4.4E Installation in a Structure with No Existing Forced  in a central area of the structure. Optional: Duct the supply of the  Air HVAC System  UA-90H to a 10"  x 10"  x 10" tee/damper that is 20% open to  When installing the UA-90H in a structure that does not have a  the crawlspace if desired. Duct the other side of the tee to the  forced air HVAC system, a single return for the UA-90H should  air suppl
                    
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                        FOR HVAC INSTALLER AND HOMEOWNER To determine how each control operates the UA-90H, it must When the fan/filter switch is in the “ON” position, the motorized  first be determined which control is being used and whether damper will open and the fan will run, introducing outside air. The  or not the 90H is ducted for fresh air ventilation. Refer to unit may or may not be dehumidifying in the ventilation mode,  appropriate section. depending on the humidity control setting. See Section 4.7 for  hum
                    
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                        FOR HVAC INSTALLER AND HOMEOWNER 4.9 Ventilation Timer 4.9B Ventilation Schedule  The ventilation timer controls the fan and the motorized fresh Slide the switch in the upper right hand corner to the program  air damper. When the ventilation timer is activated, the UA-90H symbol P. “ON” will appear to the right of the time and the number  will circulate the indoor air, and bring in fresh air from outside. “1” will appear in the lower right hand corner of the display. The  The ventilation timer s
                    
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                        FOR HVAC INSTALLER ONLY 8. Test connections (see Section 2.6) 5. D EH 3000 Digital Control   Installation Instructions Control Part No. 4026570 5.1 Specifications Part # (P/N) 4026570  Model: DEH 3000 Digital Control Electrical: 24 VAC Humidity Range: 10 – 95% RH Humidity Accuracy: +/- 5% Output: 3 Amps 24 VAC  Relay Capacity 5 Amps  Temp Range/Accuracy 2%  Size 4.95" wide x 4.19" high 5.2B Wiring FOR HVAC INSTALLER ONLY: WARNING: DO NOT ALLOW THE YELLOW LEAD  FROM THE ULTRA-AIRE TO CONTACT THE 
                    
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                        FOR HVAC INSTALLER ONLY Dehumidification    Operation COM/NO COM/NC  UA Base Unit White  ON CLOSED OPEN  OFF OPEN CLOSED  Common uses (assuming standard thermostat wiring color  schemes as noted): Disengage A/C during dehumidification Redirect the yellow thermostat wire to the NC  DEH 3000 Wiring Diagram terminal. Wire the yellow wire from the A/C to the  COM (B) terminal. Engage A/C during dehumidification DMP COMP FAN Connect a wire from the “R” terminal on the the  thermostat to the “com” ter
                    
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                        FOR HVAC INSTALLER ONLY DEHUMIDIFIER DEACTIVATES WHEN THE  motorized damper in series with these connections, or the  AIR-CONDITIONER IS RUNNING white wire must not be connected to the control. Mis-wiring  •  The common wire on the thermostat transformer may result in transformer damage. (black) needs to be wired with the yellow wire from the  After connections have been verified, this short test will  dehumidifier. confirm proper wiring. •  The Red wire on the thermostat needs to be wired with 
                    
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                        FOR HVAC INSTALLER AND HOMEOWNER 8. V erify additional optional control operations such as fan interlock  or lockout. 9. Proceed to operation/setting section.  FOR INSTALLER & HOMEOWNER: 5.3 Operation 5.3A Display • W hen there is power to the control, the control display will  show the time, day, humidity, and temperature.  •  When the control is turned on, the setpoint, fan status,  auto/hold mode, and fresh air vent status is displayed.   • When a key is pressed the display will light. • T he
                    
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                        FOR HVAC INSTALLER ONLY AND HOMEOWNER Operation continuously are filtration and air recirculation. The initial dead band setting (the range that the dehumidifier  “AUTO” – indicates the fan will run when the control calls for  cycles on and off) is 3%. With a setpoint of 50%, the dumidifier  dehumidification or ventilation. If the control has not called for  turns on when the reading reaches 53%. The dehumidifier  dehumidification for 3 hours, the control will automatically run  continues to rem
                    
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                        FOR HVAC INSTALLER ONLY AND HOMEOWNER The ventilation indicator “O” will be displayed whenever the unit There are two programs available for ventilation Monday  through Friday. There are also two programs for Saturday and  is ventilating. The fan operation indicator “O” will also be lit. Sunday.  No other choice of days is available.  There are three damper operation modes, “OPEN –HOLD,”    “CLOSED – HOLD” and “PROGRAM” (denoted by “ON TIME” Each program has:  – “OFF TIME.”  Refer to section 3.8
                    
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                        FOR HVAC INSTALLER AND HOMEOWNER 2.   Press the program enter key to toggle to the “open for” feature will not need to be used. If temperature cutout is desired,  setting.  Using the up/down “RH”  keys, change the program the setpoint by pressing the “PROGRAM ENTER”  duration that the damper will ventilate fresh air. button. Press RH until “TEMP CUTOUT”  is flashing. Use “RH”   up or “RH”  down to adjust setpoints. 3.   Press the program enter key to toggle to the “closed  for” setting.  Using t
                    
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                        ATTENTION INSTALLER WIRE THE UNIT AND CONTROL PACKAGE AS SHOWN IN THE DIAGRAM BELOW Humidity/Fan Control Panel Humidity Control D.BLU-5 YEL-2 Blower Switch GRN-6 GRN-6 PNK WHT-1 RED-3 YEL-2 Dehumidifier D.BLU-5 Control Part No. 4024155 Do not connect these leads  Ventilation Timer/ directly together or damage  Humidity Control Panel Optional to the transformer will result. Damper Humidity Control D.BLU-5 YEL-2 VIO-4 ORG GRN-6 L.BLU PNK REd-3 GRN-6 WHT-1 RED-3 GRY YEL-2 Control Part No. 4024125 D
                    
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                        FOR HVAC INSTALLER AND HOMEOWNER 7. Maintenance  7.1 Standard Air Filter  The UA-90H is equipped with a MERV 11 media filter. This filter  should be checked every three months. Operating the unit with  a dirty filter will reduce dehumidifier capacity and efficiency and  may cause the compressor to cycle off and on unnecessarily on the  defrost control.  DO NOT operate the unit without the standard filter or with a  less effective filter than the standard filter. The heat exchange  coils inside t
                    
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                        ULTRA-AIRE 90H WIRING DIAGRAM 8. Wiring Diagrams UA-90H with Humidity/Fan Control UA-90H with Ventilation Timer/Humidity/  (4024155) Fan Control (4024125)  18 Ultra-Aire 90H Installer’s & Owner’s Manual 19 Ultra-Aire 90H Installer’s & Owner’s Manual                                                                                                                                                                                                                                                           
                    
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                        FOR HVAC INSTALLER ONLY 9. Optional Parts List: UA-90H Indoor Air Quality System  Item  Part No.  Description  1  4024125  Control Panel Assembly, Ventilation Timer & Humidity Control  2  4024155  Control Panel Assembly, Humidity/Fan  3  4026570   DEH 3000 Digital Controller  4  4025287 Filter Box  5  4026151  14"x14"x1" Standard UA 90-H Filter  6  4024369  2"x20"x24" Filter (not shown) Use only with Filter Box  7  4024370  4"x20"x24" Filter (not shown) Use only with Filter Box  8  4026451  Cond