Quick Start Manual

XN110H Installation Guide
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
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.
Cleaning and Maintenance
To Clean
For quiet and efficient operation, long life and attractive
appearance, remove Grille and vacuum interior of unit with a
dusting brush attachment.
Do not use cleaning sprays, solvents or water on, or near, the
sensor.
Motor is permanently lubricated and never needs oiling. If
motor is making excessive or unusual noises, replace Control
Assembly and Motor.
Troubleshooting
Before continuing, turn off power as previously noted in
WARNING and CAUTION sections at the top of this page.
Symptom: Fan does not run.
• Checkforanopenfuseorcircuitbreakerinthebuild-
ing’s service panel.
• Checkthatthetwo(2)plug-inconnectionsfortheMotor
and the Control are seated firmly in place.
• Checktwo(2)plug-inconnectionsforSensorandits
Control are seated firmly in place.
• CheckthattheBlowerWheelspinsfreely.
Symptom: Humidity mode does not operate fan.
• Checktwo(2)plug-inconnectionsforSensorandits
Control are seated firmly in place.
Symptom: The fan runs erratically.
• CheckthattheBlowerWheelisfirmlyattachedtothe
Motor shaft and both spin freely.
Symptom: The fan seems noisy.
• Checkthatthebackdraftdamperinthefan’sDuctCon-
nector pivots freely. Screws used to attach the duct to
the Duct Connector may be preventing the damper from
opening.
• Checkthatthebackdraftdamperinthewallorroofcap
pivots freely. These dampers are sometimes mistakenly
painted shut or obstructed by bird and insect debris.
CAUTION
IN ORDER TO PREVENT MOTOR/CONTROL DAMAGE:
DO NOT remove motor plug to stop spinning motor.
Power must be disconnected (see WARNING at top left of
this page) before motor plug is removed or inserted into
control assembly.