ZN110H 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
It is normal for this ventilation fan to take approximately 5 sec-
onds to start running after it is turned on.
Modes
(For reference, wiring diagrams are on pages 5 and 10.)
Continuous ventilation:
1. Turn master wall switch on (make sure any other wall
switches are off).
2. Fan operates at user-adjustable airflow rate.
Humidity sensing:
1. If master wall switch is not already on, turn it on.
2. Turn sensor/control wall switch on (make sure any other wall
switches are off). Some installations may not have a separate
sensor/control wall switch; where it is combined with master
wall switch.
3. Sensor monitors humidity level for (a) moderate to rapid rise
or (b) above set-point.
4. Fan operates at certified airflow rate to reduce humidity.
5. When humidity decreases, fan enters time delay mode. (See
below.)
Manual-on
(optional manual-on wall switch must be installed):
1. Turn master and manual-on wall switches on (sensor/control
wall switch can be on or off).
2. Fan operates at certified airflow rate.
3. When manual-on wall switch is turned off, fan enters timed-
off mode. (See below.)
Toggle
(for manual operation when optional manual-on wall
switch is not installed):
1. If master wall switch is not already on, turn it on.
2. Turn sensor/control wall switch on (make sure any other wall
switches are off). Some installations may not have a separate
sensor/control wall switch; where it is combined with master
wall switch then turn master wall switch on and off using
following instructions.
3. Wait at least one-second.
4. Turn switch off for less than one-second.
5. Turn switch back on.
6. Fan will operate at certified airflow rate and enter time delay
mode. (See next.)
Time Delay:
Fan operates at certified airflow rate until user-adjustable TIME
delay has passed, then fan reverts to user-adjustable airflow rate.
To Set User-Adjustable
Humidity Sensitivity**
Using a small, flat-blade
screwdriver, carefully rotate
HUMIDITY adjustment until
arrow points to desired
humidity level shown in
percent relative humidity (%RH).
** User-adjustable humidity sensitivity is located in corner of
Fan Housing behind Grille.
To Set the User-Adjustable Airflow Rate*
Using a small, flat-blade screwdriver, carefully rotate the CFM
adjustment until the arrow points to the desired airflow rate.
To Set the User-Adjustable Time Delay*
Using a small, flat-blade screwdriver, carefully rotate the TIME
adjustment until arrow points to the desired minutes of time
delay.
* The user-adjustable controls are located in one corner of the
Fan Housing, behind the Grille.
To Turn Fan OFF
Turn the master switch OFF.
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.
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.
