Therma-Stor Products Group UA-135H - Manual (Page 8)

4.7A 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 4.8.
4.7B 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 4.8.
4.7C Humidity/Fan Control Panel
WITH Fresh Air Ventilation AND Damper
In 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
4.7D Ventilation Timer and Humidity Control
WITH Fresh Air AND Motorized Damper
Refer to sections 4.8 through 4.13.
4.7E DEH 2000 Digital Controller
WITH Fresh Air AND Damper
Refer to Section 5.
4.7F DEH 2000 Digital Controller WITHOUT Fresh Air
Refer to Sections 5 through Section 5.2G only.
4.8 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. Therefore there is no benefit to set the humidity control to
excessively low levels in cool rooms; doing so will result in long
periods of ineffective dehumidifier run time. Settings below 45% are
not recommended.
4.9 Fan/Filter Switch
Turning ON the fan/filter switch to FAN ON”
position 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 “FAN ON” position, air will be constantly
filtered through the UA-135H and circulated
throughout the house. When the switch is “FAN AUTO” position the
impeller fan will operate only when the humidity control calls for
dehumidification or when the ventilation timer calls for ventilation.
4.10 Ventilation Timer
The ventilation timer controls the impeller fan and the motorized
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 one-
minute time increments of the ventilation timer allow you to program
the ventilation of your home to fit your schedule.
The ventilation timer allows six programs with each program having
one "on" and one "off" event. A program allows the user to turn the
ventilation on at a certain day and time, then it allows them to turn
the ventilation off at a certain day and time. Each of these programs
can be repeated daily or weekly or during a specified block of days.
All six of the programs operate independently of each other. If the
timer fails to operate or operates erratically, check that the control
FOR HVAC INSTALLER ONLY
8
Figure 12
Humidity Control
Adjustment Knob
Figure 13
Fan/Filter Switch
Ultra-Aire 135H Installer’s & Owner’s Manual