NuTone ZN80ML Installation Manual

Also see for ZN110ML: Installation guide

Contents

NuTone ZN80ML Installation Manual Manual pdf 13 page image

ZN80ML n ZN110ML Installation GuidePage 13TroubleshootingBefore continuing, turn off power as previously noted inWARNING section on the previous page and CAUTIONsection at the top of this page.Symptom: Fan does not run.• Check for an open fuse or circuit breaker in building’sservice panel.• Check two (2) plug-in connections for Motor and itsControl are seated firmly in place.• Check two (2) plug-in connections for Sensor and itsControl are seated firmly in place.• Check that Blower Wheel spins freely.Symptom: Motion mode does not operate fan atcertified air flow rate.• Check two (2) plug-in connections for Sensor and itsControl are seated firmly in place.Symptom: Fan runs erratically.• Check that Blower Wheel is firmly attached to Motor shaftand both spin freely.Symptom: Fan seems noisy.• Check that back draft damper in fan’s Duct Connectorpivots freely. Screws used to attach duct to Duct Connectormay prevent damper from opening.• Check that back draft damper in wall or roof cap pivotsfreely. Dampers are sometimes mistakenly painted shut orobstructed by bird or insect debris.Symptom: Fan does not properly ventilate room.• For spot ventilation, turn both master switch and sensor/control wall switch ON, so sensor/control operates fan atcertified airflow rate.• For spot ventilation followed by continuous ventilation,increase the “TIME” setting of user-adjustable time delay.• For continuous ventilation, increase “CFM” setting of user-adjustable airflow rate.Cleaning and MaintenanceTo CleanFor quiet and efficient operation, long life and attractive ap-pearance, remove Grille and vacuum interior of unit with adusting 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, replaceControl Assembly and Motor.To Change BulbsRefer to Retrofit Installation Step14 (page 11).1. Carefully insert a smallflathead screwdriver betweenthe Grille and Lens, then twistto remove Lens.2. Purchase two (2) 18W (max.)type GU24 fluorescent lampswith Maximum Overall Length(MOL) of 3.9” (100 mm).Purchase a 4W (max.) C7-type incandescent night light bulb.3. Insert bulbs into their sockets. Replace Lens.M.O.L.3.9" (100 mm)CAUTIONIN ORDER TO PREVENT MOTOR/CONTROL DAMAGE:DO NOT remove motor plug to stop spinning motor.Power must be disconnected (see WARNING on previouspage) before motor plug is removed or inserted into controlassembly.

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