Therma-Stor Products Group FOCUS 135H - Manual (Page 3)

Ultra-Aire 135H Air Purifying Dehumidifier Owners Manual 3
4.1 Humidity/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.
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.
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.
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.
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
Figure 1: Humidity/Fan
Control Panel
Figure 2: Ventilation Timer
and Humidity Control Panel
Figure 3: Humidity Control
Adjustment Knob
Figure 4: Fan/Filter Switch