NuTone warranty Humidity Sensing Recessed, Fluorescent Fan / Light, MODEL 744SFLNT, Page

MODEL 744SFLNT

HUMIDITY SENSING RECESSED	Page 1
FLUORESCENT FAN / LIGHT

READ AND SAVE THESE INSTRUCTIONS

WARNING

TO REDUCE THE RISK OF FIRE, ELECTRIC SHOCK,OR INJURYTO PERSONS,OBSERVETHE FOLLOWING:

1.Use this unit only in the manner intended by the manufacturer. If you have questions, contact the manufacturer at the address or telephone number listed in the warranty.

2.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.

3.Installation work and electrical wiring must be done by a qualified person(s) in accordance with all applicable codes and standards, including fire-rated construction codes and standards.

4.Sufficient air is needed for proper combustion and exhausting of gases through the flue (chimney) of fuel burning equipment to prevent backdrafting. Follow the heating equipment manufacturer’s guideline and safety standards such as those published by the National Fire ProtectionAssociation (NFPA), and the American Society for Heating, Refrigeration and Air Conditioning Engineers (ASHRAE), and the local code authorities.

5.When cutting or drilling into wall or ceiling, do not damage electrical wiring and other hidden utilities.

6.Ducted fans must always be vented to the outdoors.

7.Never place a switch where it can be reached from a tub or shower.

8.Do not use a dimmer switch to operate the light in this unit.

9.Install this unit in a flat ceiling only.

10.For use in non fire rated installations only.

11.Not for use in environmental air handling spaces.

12.If this unit is to be installed over a tub or shower, it must be marked as appropriate for the application and be connected to a GFCI (Ground Fault Circuit Interrupter) - protected branch circuit.

13.Do not install in a ceiling thermally insulated to a value greater than R40.

14.This unit must be grounded.

CAUTION !

1.For general ventilating use only. Do not use to exhaust hazardous or explosive materials and vapors.

2.To avoid motor bearing damage and noisy and/ or unbalanced impellers, use the cardboard protector (provided) to keep drywall spray, construction dust, etc. off power unit.

3.The fluorescent bulb used with this product inserts straight into the bulb socket. Do not attempt to insert or remove bulb by twisting it.

4.Please read specification label on product for further information and requirements.

OPERATION

The light, fan and humidity control can be operated together or independently using multi-function switch wall controls.

•Use a 3-function control to independently operate light, fan and humidity control.

•Use a 2-function control to independently operate light and humidity control. For fan operation see MANUAL ON WITH TIMED OFF section below.

•Use a 2-function control to independently operate light and fan. Wire humidity control direct to insure humidity control is always on.

See “Connect Wiring” section for various wiring options.

Do not use a dimmer switch control to operate light, fan or humidity control.

SENSOR OPERATION

This humidity-sensing fan responds to: (a) rapid to moderate humidity increases and (b) humidity above a 50%-100% relative humidity set-point. (a) and (b) are set with “SENSITIVITY” adjustment. Fan may occasionally turn on when environmental conditions change. If the fan continuously responds to changing environmental conditions, “SENSITIVITY”adjustment may be required (see section below).

STATUS INDICATOR

This indicator can only be seen by looking directly at it. Normal mode is 5-seconds on and off. If it blinks rapidly for 5-seconds and then off, check sensor connections on trim ring/baffle and fan housing.

MANUAL ON WITH TIMED OFF

For odor or vapor control, the fan can be energized by cycling its wall-mounted switch if one is installed. Once the fan has been turned on in this manner, it will remain on for the set “TIMER” period.

To manually energize the fan:

1.Go to Step 2 if switch is already on; otherwise, turn switch on for more than 1 second.

2.Switch off for less than 1 second.

3.Switch back on and fan will turn on.

SENSITIVITY ADJUSTMENT

“SENSITIVITY” has been factory set for most shower applications. If the fan is in a tub area or is used for dampness control, the “SENSITIVITY” may need to be increased toward maximum (“MAX.”). If the control is responding too often to changing environmental conditions, adjustment toward less (“MIN.”) “SENSITIVITY” may be required. To adjust the “SENSITIVITY”:

1.Turn power off at electrical service panel.

2.Remove bulb.

3.Through trim ring/baffle, locate the“SENSITIVITY” screwdriver slot.

4.Using a small, flat-blade screwdriver, carefully rotate “SENSITIVITY” adjustment clockwise toward “MAX.”or counterclockwise toward “MIN.”

5.Re-install bulb.

6.Turn power on and check operation by turning on shower or other humidity source until fan turns on.

7.Repeat above steps if necessary.

TIMER ADJUSTMENT

This humidity-sensing fan has a “TIMER”.It is user- adjustable from 5 to 60 minutes and is factory-set at 20 minutes.The “TIMER” controls how long the fan remains on (a) after rise in humidity and (b) humidity level are both below the user-adjustable “SENSITIVITY” setting or after being energized by cycling power switch.

To adjust the “TIMER”:

1.Disconnect power at electrical service panel.

2.Remove bulb.

3.Through the trim ring/baffle, locate the “TIMER” screwdriver slot.

4.Using a small, flat-blade screwdriver, carefully rotate “TIMER” adjustment clockwise to increase time or counterclockwise to decrease time.

5.Re-install bulb.

6.Turn power on and check operation by cycling power switch as instructed under “MANUAL ON WITH TIMED OFF” or by turning on a humidity source until fan turns on.

7.Check “TIMER” setting with watch or clock after turning humidity source off if it was turned on it Step 6.

8.Repeat above steps if necessary.

CLEANING & MAINTENANCE

To clean trim ring / baffle: Vacuum with a soft brush attachment or remove trim ring / baffle and clean with a soft cloth.

SENSOR CLEANING

The humidity sensor is mounted in the trim ring/baffle. The sensor will operate most reliably when cleaned occasionally as follows:

1.Disconnect power at service entrance.

2.Remove the trim ring/baffle. Use a dry dustcloth, clean toothbrush, or lightly vacuum to clean sensor and grille.

DO NOT USE ABRASIVE CLOTH, STEEL WOOL PADS, OR SCOURING POWDERS.

3.DO NOT USE cleaning sprays, solvents, or water on or near the sensor!

To clean inside of housing: Remove trim ring / baffle and vacuum inside of housing with a soft brush attachment.

Motor is permanently lubricated. Do not oil or disassemble motor.

See “Service Parts” section for a list and illustrations of service parts.

Installer: Leave this manual

with the homeowner.