NuTone ZN110 Instruction Manual download pdf (Page 12)

ZN80

ZN110 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

To Turn Fan ON

Turn the master switch ON.

It is normal for this ventilation fan to take approximately 5

seconds to start running after it is turned on.

• Fan will run at the certified airflow rate if the mode

select switch is ON.

• Fan will run at the user-adjustable airflow rate if the

mode select switch is OFF.

To Use Fan Time Delay Airflow Rate Change

1. Turn the master switch ON.

2. Turn the mode select switch ON - fan will run at the

certified airflow rate.

3. When the mode select switch is turned OFF, fan will

continue to run at the certified airflow rate until the

user-adjustable time delay has elapsed, and then will

automatically change to the user-adjustable airflow rate.

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 the arrow points to the desired time

delay, shown in minutes.

* 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.

The Motor is permanently lubricated and never needs

oiling. If the motor bearings are making excessive or

unusual noises, replace the Control Assembly and Motor.

Troubleshooting

Symptom: The fan does not run.

• Check for an open fuse or circuit breaker in the

building’s service panel.

• Check that the two (2) plug-in connections for the Motor

and the Control are seated firmly in place.

• Check that the Blower Wheel spins freely.

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

Connector 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.

Symptom: The fan does not properly ventilate the room.

• For spot ventilation, turn both the master switch and the

mode select switch ON to enable the fan to run at the

certified airflow rate.

• For spot ventilation followed by continuous ventilation,

increase the “TIME” setting of the user-adjustable time

delay.

• For continuous ventilation, increase the “CFM” setting of

the user-adjustable airflow rate.

ZN80 User-adjustable controls

ZN110 User-adjustable controls

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.

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NuTone ZN110 Instruction Manual Page 12

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