Therma-Stor Products Group UA-135H instruction

FOR HVAC INSTALLER ONLY

Duct Sizing: For total duct lengths up to 25', use a minimum 10" diameter round or equivalent rectangular. For longer lengths, use a minimum 12" diameter or equivalent. Grills or diffusers on the duct ends must not excessively restrict airflow.

Isolated Areas: Effective dehumidification may require that ducting be branched to isolated, stagnant air flow areas. Use 8" or larger diameter branch ducting to each of two or three areas, use 6" or larger to each of four or more areas. Provisions must be made to provide airflow from supply locations to central return location. Proper air distribution is important to ensure even humidity control and heat distribution throughout the structure.

Connecting to existing HVAC systems: An optional 10" check damper is available from the factory to prevent reverse flow through the UA-135H. If the UA-135H is ducted to the supply of a high static air handler the check damper may be placed in the UA-135H supply duct.

Contact the factory when connecting to a static pressure of greater than or equal to +.5" WG.

4.5D Ducting for Fresh Air — Option

Fresh air can be brought into the structure by connecting an insulated duct from outside the structure to the 6" inlet of the optional filter box and by turning on the fan switch or activating the humidity control (on units with the humidity control panel). Activate the ventilation timer on units with the ventilating & humidity control panel to bring in fresh air. Refer to section “Programming Instructions” for the ventilation timer. 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 the UA-135H is running in dehumidification mode.

3.Drawing air from outside and blowing inside aids in slightly pressurizing the structure. This helps prevent dirty and humid air from entering elsewhere. It also reduces the potential for carcinogenic radon gas to enter and provides make-up air for open combustion and exhaust devices like the clothes drier, fireplace, and water heater.

4.Exhaust fans are recommended in the bath rooms and kitchen.

In cold climates or areas where the outdoor dew point is low at times, ventilation can be used to dehumidify the structure. This is accomplished by bringing the dry, low dew point air into

the structure during these times. This approach is often more economical than running the dehumidifier to remove excess moisture from the structure. In cold climates, it is critical to adequately ventilate to reduce the inside moisture content to avoid moisture accumulating in the wall cavities. For example; in a house that experiences condensation on the interior surface of the windows during the winter, increasing the amount of ventilation will often cure the problem.

An insulated 6" diameter duct is generally sufficient to provide up to 125 CFM of outside air. Large quantities of outside air will impact UA-135H performance positively or negatively, depending upon the inside and outside air conditions.

The outside air duct should be connected to the 6" round collar on the filter enclosure of the unit. The amount of fresh air should be based on the size and occupancy of the residence. If you are unsure of your ventilation air requirements or have need for higher air flows, consult the factory by calling 1-800-533-7533 for assistance.

4.5E Installation in a Basement or Crawlspace with an Existing Forced Air HVAC System.

Basement Installation: Install a separate 10" return for the UA-135H in a central area of the structure. Duct the supply of the Ultra-Aire to a 10" x 10" x 10"tee/damper, adjusted to 20% open to the basement. Duct the other side of the tee to the air supply of the existing HVAC system. Connect a duct from outside to the 6" collar of the Ultra-Aire if you wish to provide fresh make-up air. See Figure 6.

Crawlspace Installation: Install a separate return for the UA-135H in a central area of the structure. Duct the supply of the UA-135H to a 10" x 10" x 10" tee/damper that is 20% open to the crawl space if desired. Duct the other side of the tee to the air supply of the existing HVAC system. Connect an insulated duct from outside to the 6" collar of the UA-135H if you wish to provide optional fresh make-up air.

If the existing system has multiple returns, select one to disconnect from the existing forced air system and use it for the dedicated

6	Ultra-Aire 135H Installer’s & Owner’s Manual

UA-135H specifications

The Therma-Stor Products Group UA-135H is a cutting-edge unit designed for efficient humidity control in various settings, especially in residential and commercial environments. This product stands out due to its robust construction and innovative technology, making it a preferred choice for those looking to maintain optimal air quality.

One of the key features of the UA-135H is its high-capacity dehumidification ability. With a removal capacity of up to 135 pints per day, this unit is ideal for tackling dampness in basements, crawl spaces, and larger living areas. This impressive capacity allows for effective moisture management, which is crucial in preventing mold growth and maintaining a healthy indoor environment.

Technologically advanced, the UA-135H incorporates a powerful compressor and a high-efficiency fan that ensures rapid and uniform air circulation. This design not only aids in faster moisture extraction but also enhances the overall energy efficiency of the unit. The built-in hygrometer monitors the humidity levels in real-time, allowing for automatic adjustments to optimize performance and reduce energy consumption.

Ease of use is another highlight of the UA-135H. The unit features a user-friendly digital control panel, enabling users to set their desired humidity levels with precision. Additionally, the product is equipped with a continuous drainage option, allowing for hassle-free operation without the need for frequent emptying of the water tank.

Durability is a hallmark of the UA-135H, featuring a corrosion-resistant housing that ensures longevity even in challenging environments. The unit operates quietly, providing effective humidity control without disturbing the peace of your home or workplace.

Energy efficiency ratings further enhance the appeal of the UA-135H. It not only meets but often exceeds industry standards, translating to cost savings on energy bills. The unit is also designed for easy maintenance, with accessible filters that can be cleaned or replaced with minimal effort, ensuring optimal performance over time.

In conclusion, the Therma-Stor Products Group UA-135H is a reliable and efficient solution for humidity control. Its combination of high-capacity dehumidification, advanced technology, user-friendly features, and durable design makes it an excellent investment for maintaining a healthy indoor environment. Whether for residential or commercial use, the UA-135H promises effective performance and long-lasting reliability.