Therma-Stor Products Group 135H owner manual 4.1E DEH 2000 Digital Controller WITHOUT Fresh Air

4.1Humidity/Fan Control Panel WITHOUT Fresh Air Ventilation or Damper

The humidity/fan control panel automatically controls the humidity of the living space. The humidity/fan control panel contains an adjustable humidity control and a fan switch. The panel has a cover that must remain open to the air within the living space for accurate humidity sensing. Position the fan switch ON when the home is occupied. This filters and circulates air throughout the home. For humidity control operation refer to section 4.2.

Figure 1: Humidity/Fan

Control Panel

4.1A Humidity/Fan Control Panel WITH Fresh Air Ventilation and WITHOUT Damper

The humidity/fan control panel automatically controls the humidity of the living space. The humidity/fan control panel contains an adjustable humidity control and a fan switch. The panel has a cover that must remain open to the air within the living space for accurate humidity sensing. Position the fan switch “ON” when the home is occupied. This filters and circulates air throughout the home. Outside air is introduced whenever fan is “ON.” Manual operation of fan filter switch controls outside air and ventilation. Since the fan operates whenever the UA-135H is dehumidifying outside air will be introduced. For humidity control operation refer to section 4.2.

4.1B Humidity/Fan Control Panel WITH Fresh Air Ventilation AND Damper

MIn this configuration, a motorized damper has been installed in the fresh air duct. When the fan/filter switch is in the “OFF” position, the damper is closed. The UA-135H will then circulate and dehumidify air to provide humidity control.

When the fan/filter switch is in the “ON” position, the motorized damper will open and the fan will run, introducing outside air. The unit may or may not be dehumidifying in the ventilation mode, depending on the humidity control setting. See Section 4.2 for humidity control operation.

4.1C Ventilation Timer and Humidity Control WITH Fresh Air AND Motorized Damper

Refer to sections 4.2 through 4.7.

Figure 2: Ventilation Timer

and Humidity Control Panel

4.1D DEH 2000 Digital Controller WITH Fresh Air AND Damper

Refer to Section 5.

4.1E DEH 2000 Digital Controller WITHOUT Fresh Air

Refer to Sections 5 through Section 5.2G only.

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 control panel cover for set points. The dehumidifier will run continuously until the relative humidity (RH) is reduced to the humidity control dial setting. Setting the humidity control to lower RH levels will NOT increase the unit's dehumidification rate; the unit will simply run longer to reduce the area's RH to the setting. The UA-135H unit (and refrigerant-based dehumidifiers in general) will reduce a warm space's RH to a lower level than that of a cool space. It is therefore pointless to set the humidity control to exces- sively low levels in cool rooms; doing so will result in long periods of ineffective dehumidifier run time. Settings below 45% are not recommended.

Figure 3: Humidity Control

Adjustment Knob

4.3 Fan/Filter Switch

Turning ON the fan/filter switch will cause the UA-135H impeller fan to run continuously, whether the UA-135H is dehumidifying or not. This function is desirable if the unit is used for air circulation and filtration to achieve maximum indoor air quality. When the switch is ON; air will be constant- ly filtered through the UA-135H and circulated throughout the house. When the switch is OFF the impeller fan will operate only when the humidity control calls for dehumidification or when the ventilation timer calls for ventilation.

Figure 4: Fan/Filter Switch

4.4 Ventilation Timer

The ventilation timer controls the impeller fan and the motor- ized fresh air damper. When the ventilation timer is activated, the UA-135H will circulate the indoor air, 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 standards.The ventilation timer is an electronic timer that displays the current time. This timer has battery backup, so it will not require resetting after a power outage. Following a prolonged power outage the display of the timer will flash on and off indicating a power outage has occurred. The

Ultra-Aire 135H Air Purifying Dehumidifier Owners Manual 3