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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 NOT INSTALL UNIT WITH THE 
FRONT PANEL 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, splashed and that it is plugged into a 
GFCI GROUND FAULT CIRCUIT INTERRUPT OUTLET. 

•  DO NOT use the device as a bench or table. 

• DO NOT place the device directly on structural members.

•  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

 WARNING!

 

— This symbol means important 

instructions. Failure to heed them can result in serious 

injury or death.

 CAUTION!

 

— This symbol means important 

instructions. Failure to heed them can result in injury or 

material property damage.

1. 

 

Intended Application for Ultra-Aire 90H 

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 heating 
system can be used to supply air to the home. 

2. Registrations 

The UA-90H conforms to UL STD 474 and CSA Standard C22.2 No.92. 

3. Specifications 

Part Number:

 4029820

Blower:

 

 245 CFM @ 0.0" WG 
220 CFM @ 0.4" WG

Power:

 

710 Watts @ 80°F/60% RH

Supply Voltage:

 

110 -120 Volt – 60 Hz.

Current Draw:

 6.7 

Energy Factor:

 

2.5 L/kWhr 

Operating Temp.:

 

56°F Min, 100°F Max

Sized For:

 

2200 Square Foot Typical

Minimum Performance at 80° F/60% RH: 

Capacity:

 

90 Pints/Day

Efficiency:

 

5.3 pints/kWhr

UA-90H Duct

 

Connections:

6" Round Inlet; 10" Round Inlet; 10" Round Outlet

Filter Efficiency:

 

 Standard MERV-11  
(65% ASHRAE Dust Spot)

Power Cord:

 8'

Drain Connection:

 

3/4" Threaded FPT 

UA-90H Dimensions:

 

 Unit 

Shipping 

Width: 

14.5" 

18.5"  

Height: 

21.5" 

21.5"  

Length: 

33.5" 

40.0"

Weight: 

92lbs 

102lbs 

4. Installation 

4.1 Installation Checklist 

 CAUTION!

 

Prior to installation of the UA-90H, the following checklist should 
be reviewed. The UA-90H can be installed in a variety of locations 
to meet the owner’s needs, and integrate with existing forced 
air systems or existing ductwork if desired. The location choice 
is contingent on a variety of requirements not limited to: ease 
of service, controls access, drainage, filtration, power, fresh-air 
ventilation, water damage prevention, and current regulatory codes 
(ASHRAE, fire, etc). Please address all of these issues before you 
select the device’s location. 

n

  

4.1A Power Accessibility 

Unit should be located in an area where the cord’s  length (8’) 
should easily reach a 115 VAC electrical  outlet with a minimum of 
a 15 A circuit capacity. 

SAFETY PRECAUTIONS

3

Ultra-Aire 90H Installer’s & Owner’s Manual

Summary of Contents for Ultra-Aire 90

Page 1: ...e condenser coil The heat removed by the evaporator coil is then returned to the air stream Fresh Air Ventilation optional Fresh air may be ducted to the unit and regulated by a variety of controls in...

Page 2: ...Crawlspace 8 4 4D Installation in an Attic 8 4 4E Installation in a Structure with No Forced Air HVAC System 8 4 4F Ducting for High Efficiency Filtration 9 4 5 Compressor Release and Noise Abatement...

Page 3: ...den utility room or family room The ductwork of the existing heating system can be used to supply air to the home 2 Registrations The UA 90H conforms to UL STD 474 and CSA Standard C22 2 No 92 3 Speci...

Page 4: ...rately sense the relative humidity such as near HVAC supply registers near exterior doors on an outside wall near a window or near a water source The installer must supply the wiring between the UA 90...

Page 5: ...heating system can be used to supply air to the home If the existing supply goes to isolated areas of the home discharge the supply of the UA 90H into the supply of the existing heating system Instal...

Page 6: ...re only used for 90 flow option 180 Flow B Upward out of the top 90 flow Remove the 10 circular knock out from top panel of dehumidifier using side cutters Attach three white plates using three 8 scre...

Page 7: ...the structure to the 6 inlet of the UA 90H Advantages of this form of ventilation include 1 Outside air is filtered before entering the building 2 Outside air will be dehumidified before entering if t...

Page 8: ...ion in an Attic with an Existing Forced Air HVAC System CAUTION ALWAYS install a catch pan with a drain or float interrupt for condensate under the UA 90H in an attic or condensate may damage the livi...

Page 9: ...that may be installed with the UA 90H The filter box is ducted to the intake of the UA 90H and the intake ducting is then connected to the intake side of the filter box See the optional accessories l...

Page 10: ...trol Blue Dehumidification fan and compressor control Red 24volt AC power transformer neutral side common with white White 24volt AC power transformer neutral side common with red Yellow transformer h...

Page 11: ...Humidity Range Accuracy 10 95 RH 5 Auxillary Relay Capacity 5 Amps 24VAC Temp Range Accuracy 30 90 F 2 Size 4 95 L x 1 06 W x 4 19 H Major Operations n Digital control of Relative Humidity Digital Se...

Page 12: ...filter s ability to trap particles ranging in size from 3 0 microns to 10 0 microns Residential filters commonly have MERV ratings of 1 12 The higher the MERV rating the more efficient the filter is a...

Page 13: ...s List UA 90H Indoor Air Quality System Item Part No Description 1 4029168 Compressor 2 4029169 Compressor Overload 3 4022484 Compressor Relay SPST 24 Vac 30A 4 4029845 Compressor Run Capacitor 45 MFD...

Page 14: ...h pressure and temperature 10 2 Troubleshooting Neither fan nor compressor running Dehumidification is being called for No fan call 1 Unit unplugged or no power to outlet 2 Humidity control set too hi...

Page 15: ...HAZARD Electrical power must be present to perform some tests These tests should be performed by a qualified service person 10 5 Electric Ventilation Damper The electric ventilation damper is control...

Page 16: ...lter door is facing upward Note the locations of the four leveling feet and the hose adaptor Step 2 Partially screw in the leveling feet at the four locations Step 3 Hand tighten the hose adaptor to g...

Page 17: ...e pump and the short end onto the adaptor Make sure that the hose fully covers the adaptor barbs Step 9 Adjust the height of the leveling feet to move the level bubble into the clear area of the windo...

Page 18: ...sts related to changes to a Product or Component that may be required by any codes laws or regulations that may become effective after initial purchase of the Product by Customer Customer Responsibili...

Page 19: ...n any form or by any means electronic or mechanical for any purpose without the express written permission of Therma Stor LLC 2008 Therma Stor LLC All rights reserved 4201 Lien Rd Madison WI 53704 Pho...

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