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Dehumidification

The highly efficient Ultra-Aire XT150H dehumidifier utilizes 
refrigeration to cool the incoming air stream below its dew point. 
This cooled and drier air is used to pre-cool the incoming air stream 
resulting in a significant increase in overall efficiency. After the pre-
cooling stage, the processed air is reheated by passing through the 
condenser coil. The heat removed by the evaporator coil is returned 
to the air stream, resulting in an overall temperature increase of the 
air leaving the unit.

The Ultra-Aire XT150H is controlled by 24 volt remote wired controls. 
A variety of controls are available suitable to various applications.

Fresh Air Ventilation 

Optional fresh outdoor air may be ducted to the unit via a six inch 
round duct. This provides fresh air to dilute pollutants and maintain 
high oxygen content in the air. The amount of fresh air ventilation 
can be regulated by a variety of dampers and controls.

Air Filtration

The Ultra-Aire XT150H includes air filtration to improve indoor air 
quality. A MERV-11 media filter is standard. An optional external 
MERV-14 deep pleated 95% media filter is available for optimum air 
filtration and to reduce potentially harmful airborne particles. If the 
optional filter is chosen, a standard filter operates as a prefilter.

© 2007 Therma-Stor LLC • Manual P/N TS-372, 8/07

P.O. Box 8680 Madison, WI 53708 

 TOLL-FREE 1-800-533-7533 

 www.thermastor.com 

 sales@thermastor.com

INSTALLER’S & OWNER’S MANUAL

HVAC INSTALLER: PLEASE LEAVE MANUAL FOR HOMEOWNER

P/N 4026480  •  Serial No.________________________ Install Date:___________ 
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Summary of Contents for Ultra-Aire XT150H

Page 1: ...tdoor air may be ducted to the unit via a six inch round duct This provides fresh air to dilute pollutants and maintain high oxygen content in the air The amount of fresh air ventilation can be regula...

Page 2: ...igital Control WITHOUT Fresh Air 9 4 2 Humidity Control Adjustment 8 4 3 Fan Filter Switch 8 4 4 Ventilation Timer 8 4 4A Setting the Time 9 4 4B Ventilation Schedule 9 4 4C Automatic or Manual Mode 9...

Page 3: ...th space to access the back or side panels for maintenance and service DO NOT INSTALL UNIT WITH THE SERVICE PANELS INACCESSIBLE Avoid directing the discharge air at people or over the water in pool ar...

Page 4: ...l vibration and or noise 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 Place the Ultra Aire XT150H on supports that...

Page 5: ...ating 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 Ultra Aire XT150H into the supply of the existing heating syste...

Page 6: ...lter enclosure of the unit The 6 round collar includes a manual damper Adjust the manual damper to provide the desired amount of fresh air for ventilation The amount of fresh air should be based on th...

Page 7: ...edrooms den etc By ducting this way the air inside the structure will circulate through the Ultra Aire XT150H to be filtered and dehumidified Avoid discharging all the air from the dehumidifier in one...

Page 8: ...ir Refer to Section 5 4 2 Humidity Control Adjustment Set the humidity control to the desired humidity level for the home Turning the knob clockwise results in a drier setting See the back of the cont...

Page 9: ...the week for this program You can choose Mon Sun Mon Fri Sat Sun or any single day of the week The days chosen are shown along the top of the display on the ventilation timer Next press the h button...

Page 10: ...e lead from the unit or damage to the transformers will result Do not direct connect the white lead on the unit to the violet lead on the ventilation control or damage to the transformer will result H...

Page 11: ...ty 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 Set Point...

Page 12: ...heck and clean the screen on the outdoor fresh air return seasonally The screen may become plugged during the seasons when there are many particles in the outdoor air 7 Service 7 1 Warranty A warranty...

Page 13: ...uch as expected 1 Air temperature and or humidity have dropped 2 Humidity meter and or thermometer used are out of calibration 3 Unit has entered defrost cycle Sec 5 8 4 Air filter dirty Sec 4 1 4 2 5...

Page 14: ...capacitor Plug in and turn on the unit If the compressor fails to start replace the run capacitor 11 If the unit still does not start adding a hard start kit relay capacitor will provide greater start...

Page 15: ...and bring in fresh air from outside The ventilation timer should be set for the required ventilation of the residence The home should be ventilated with fresh air as suggested by applicable codes and...

Page 16: ...Aire XT150H to the blue 5 lead on the control panel If the pump fails this switch opens the compressor control circuit and stops water production before the reservoir overflows The Ultra Aire XT150H...

Page 17: ...FOR HVAC INSTALLER ONLY 17 Pictorial Electrical Diagrams of Ultra Aire XT150H Ultra Aire XT150H Installer s Owner s Manual...

Page 18: ...t No Qty Description 12 4026687 1 45mFd CAPACITOR COMPRESSOR 13 4022487 1 TRANSFORMER 14 4022484 1 RELAY COMPRESSOR 15 4017021 1 15mFd CAPACITOR IMPELLER 16 4026932 1 COLLAR 10 INCH 17 4026947 1 COLLA...

Page 19: ...Electrically Actuated not shown 32 4024153 1 Cover for Items 28 29 not shown 33 4021495 1 Knob Black 25 shaft 34 4024150 1 Instructions Humidity Fan not shown 35 4024122 1 Instructions Ventilation Ti...

Page 20: ...ng door shut Once the door is shut release the door latch Collar Install Remove the 2 round ducts 3 seals and small bag of mounting hardware from inside the rectangle opening Adhere seals onto the bac...

Page 21: ...costs 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 Responsib...

Page 22: ...any form or by any means electronic or mechanical for any purpose without the express written permission of Therma Stor LLC 2007 Therma Stor LLC All rights reserved PO Box 8680 Madison WI 53708 Phone...

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