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Page 12
WARNING
Before servicing or cleaning unit,
switch power off at service panel and lock the service
disconnecting means to prevent power from being
switched on accidentally. When the service disconnecting
means cannot be locked, securely fasten a prominent
warning device, such as a tag, to the service panel.
Operation
It is normal for this ventilation fan to take approximately 5
seconds to start running after it is turned on.
Modes
(For reference, wiring diagrams are on pages 5 and 10.)
Humidity sensing:
1. Turn sensor/control wall switch on (make sure manual-
on wall switch is off if it is installed).
2. Sensor monitors humidity level for (a) moderate to rapid
rise or (b) above set-point.
3. Fan operates at certified airflow rate to reduce humidity.
4. When humidity decreases, fan enters time delay mode.
(See below.)
Manual-on (optional manual-on wall switch must be
installed):
1. Turn manual-on wall switch on (sensor/control wall
switch can be on or off).
2. Fan operates at certified airflow rate.
3. Fan turns off when manual-on wall switch is turned off.
Toggle (for manual operation when optional manual-on
wall switch is not installed or manually activated timed-
off is desired):
1. Turn sensor/control wall switch on (make sure manual-
on wall switch is off if it is installed).
2. Wait at least one-second.
3. Turn switch off for less than one-second.
4. Turn switch back on.
5. Fan will operate at certified airflow rate and enter time
delay mode. (See next.)
Time Delay:
Fan continues to run until user-adjustable TIME delay has
passed, then fan turns off.
To Set User-Adjustable Humidity Sensitivity**
Using a small, flat-blade screwdriver, carefully rotate HU-
MIDITY adjustment until arrow points to desired humidity
level shown in percent relative humidity (%RH).
To Set User-Adjustable Time Delay**
Using a small, flat-blade screwdriver, carefully rotate TIME
adjustment until the arrow points to the desired minutes of
time delay.
** User-adjustable controls are located in corner of Fan
Housing behind Grille.
XB110HL1 Installation Guide
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