FOR HVAC INSTALLER AND HOMEOWNER

only the impeller fan should run. Disconnect the wires.

3.Connect the yellow and blue pigtails from the main unit together; the compressor and impeller fan should run.

4.If these tests work, the main unit is working properly. You should check the control panel and field control wiring for problems next.

5.Remove the control panel from the mounting box and detach it from the field installed control wiring. Connect the blue, yellow, and green wires from the control panel directly to the corresponding colored pigtails on the main unit. Leave the violet, white and red wires disconnected!

6.Turn on the fan switch; the impeller fan should run. Turn off the fan switch.

7.Turn on the humidity control; the compressor and impeller fan should run.

8.If these tests work, the problem is most likely in the field control wiring.

6.3 Refrigerant Charging

If the refrigerant charge is lost due to service or a leak, a new charge must be accurately weighed in. If any of the old charge is left in the system, it must be recovered before weighing in the new charge. Refer to the unit nameplate for the correct charge weight and refrigerant type.

6.4 Impeller Fan Replacement

The motorized impeller fan is a unitary assembly consisting of the motor and impeller fan. If defective, the complete assembly must be replaced.

1.Unplug the power cord

2.Remove the cabinet access panel

3.Disconnect the impeller's blue, black, brown leads, which are attached to the capacitors as well as the green/yellow ground lead.

4.Remove the impeller access plate, which is the D-shaped plate mounted to the supply/exhaust panel of the UA-135H. The impeller should be attached to this D-shaped plate. Pull the leads through the black plastic scroll housing inside, as you remove the impeller access plate.

5.Remove the two cable clamps securing the impeller cord to the access plate.

6.Remove the defective impeller from the access plate

7.Reassemble the new impeller fan by reversing the above procedure. Note: Make sure that the new impeller cord is secured tightly to the impeller access plate utilizing the two cable clamps given with the unit. Make sure to reconnect all leads in their correct positions.

6.5 Compressor/Capacitor Replacement

This compressor is equipped with a two terminal external overload and a run capacitor, but no start capacitor or relay.

CAUTION-ELECTRICAL SHOCK HAZARD: Electrical power must be present to perform some tests. These tests should be performed by a qualified service person.

6.6 Replacing a Compressor, Nonburn Out

Remove the refrigerant from the system. Replace the compressor and liquid line filter/drier. Charge the system to 50 PSIG and check for leaks. Remove the charge and weigh in the refrigerant quantity listed on the nameplate. Operate the system to verify performance.

6.7 Electric Ventilation Damper

The electric ventilation damper is controlled by the ventilation timer. The damper will open when the ventilation timer is activated to allow fresh air into the structure through the 6" diameter fresh air inlet duct. The electric ventilation damper will remain closed when the ventilation timer is not activated to prevent over-ventilating the structure when the unit is dehumidifying or recirculating the indoor air. The electric ventilation timer operates on 24 Vac from the control circuit. DO NOT connect high voltage to the damper motor or damage to the motor may result. DO NOT force the blade of the damper by hand or damage to the damper motor may result.

The damper opens in one direction only. The damper rotates very slowly, allow sufficient time for the damper to cycle. The damper will take approximately 1 minute to cycle from closed to open or from open to closed.

If the electric ventilation damper fails to operate:

1.Check that the wiring is correct and that voltage is present at the damper motor.

2.Check for any obstruction inside the damper. If the electric ventilation damper fails to operate after performing these checks, it must be replaced.

6.8 Condensate Pump Kit

An optional condensate pump kit is available from the factory for use with the UA-135H. Condensate is automatically pumped to a remote

location when the water level in the pump's reservoir rises to close the float switch. The pump also contains a safety float switch. The white leads from this switch extend from beneath the pump cover. This switch should be installed in series with the field

wire that connects the blue (#5) lead from the UA-135H 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 UA-135H will continue to ventilate or circulate air as normal, but will not dehumidify until this switch closes.

16

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

Page 15 Page 17
Page 16
Image 16
Therma-Stor Products Group UA-135H Refrigerant Charging, Impeller Fan Replacement, Compressor/Capacitor Replacement
Page 15 Page 17

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.
Top Page Image Contents