Refrigerant Charging | Therma-Stor Products Group 135H guide

7.3 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.

7.4 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 posi- tions.

7.5 Compressor/Capacitor Replacement

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

CAUTION

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

7.6Replacing 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.

7.7Electric 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.

7.8Condensate 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 venti- late or circulate air as normal, but will not dehumidify until this switch closes.

Figure 2: Condensate pump.

Ultra-Aire 135H Air Purifying Dehumidifier Owners Manual

135H specifications

Therma-Stor Products Group has introduced the innovative 135H, a high-performance dehumidifier designed to meet the needs of various applications, including residential and commercial spaces. The 135H stands out for its advanced technology and several features that improve efficiency and user-friendliness.

One of the key features of the 135H is its energy-efficient design. Utilizing a robust refrigerant system, this model ensures optimal moisture removal while maintaining low energy consumption, resulting in significant cost savings for users. The 135H is engineered to operate effectively in various humidity conditions, making it suitable for use in basements, crawl spaces, and other high-humidity environments.

The unit boasts a high-capacity water removal capability, making it one of the most effective dehumidifiers in its class. With a maximum extraction rate of up to 135 pints per day, it can tackle even the most humid situations, helping prevent mold growth, protect valuable electronics, and preserve structural integrity in homes and businesses.

In terms of user interface, the 135H features an intuitive digital control panel, allowing users to easily set their desired humidity levels. The integrated hygrometer keeps track of the current humidity, providing real-time feedback and enabling effortless adjustments. Additionally, the unit is equipped with a continuous drainage option, allowing for hassle-free operation without the need to frequently empty the water reservoir.

Durability is another hallmark of the 135H, as it is constructed from high-quality materials designed to withstand demanding environments. Its compact design allows for easy installation and portability, making it user-friendly for both residential and commercial applications.

Further enhancing the user experience, the 135H is designed with noise reduction technologies, ensuring quiet operation while maintaining high-performance levels. This feature makes it an ideal choice for living spaces, offices, or environments where minimal disruption is essential.

In conclusion, the Therma-Stor Products Group 135H dehumidifier represents a perfect blend of efficiency, technology, and user-centric design. Its powerful moisture removal capabilities, combined with energy efficiency and smart features, make it an excellent investment for anyone looking to maintain optimal humidity levels and improve indoor air quality. This model highlights Therma-Stor's commitment to providing high-quality solutions for environmental control, addressing the diverse needs of modern users.