Flex AE80SL - Fan BROAN - Free user manual and instructions

Product Type	Ceiling fan with humidity sensor and LED light
Brand	Broan
Model	Flex AE80SL
Housing dimensions (cutout)	24.8 × 26.7 cm (parallel and perpendicular to joists)
Power supply	120 VAC, 60 Hz, circuit protected by GFCI breaker
Power (CFM)	50, 80 or 110 CFM (selectable depending on model)
Main functions	Humidity detection, adjustable timer (1-60 min), LED light, manual control
Installation	Flat ceiling only (not wall), round duct 10 cm (4 in) required
Use	General ventilation only, do not use to exhaust hazardous materials
Maintenance and cleaning	Clean the grille and interior with a brush vacuum; clean humidity sensor with a soft cloth or toothbrush without chemicals
Spare parts and repairability	Fan assembly (motor + wheel), light module, grille, control box
Safety	Grounding mandatory; install by qualified person; cut power before maintenance
Warranty	See Broan.com or NuTone.com, technical support in USA (800-637-1453) and Canada (877-896-1119)

Frequently Asked Questions - Flex AE80SL BROAN

How to adjust the humidity threshold on the Flex AE80SL fan?

The factory setting is 80% humidity. To change it, cut power at the electrical panel, then turn the "%HUMIDITY" control with a small screwdriver. Choose 50% for higher sensitivity or 80% to reduce false triggers. If the problem persists, contact Broan technical support.

How to manually turn on the fan in case of odors?

Turn the power switch to the on position for at least 1 second, then turn it off for less than a second, and finally turn it back on. The fan will run for the duration set by the timer (adjustable via the "MINUTES" control).

How to clean the fan humidity sensor?

First cut the power. Remove the grille and gently clean the sensor and grille with a clean dusting cloth, a toothbrush, or a vacuum. Never use abrasive products, steel wool, spray cleaners, solvents, or water on or near the sensor.

What to do if the fan makes abnormal noise?

First check that the installation is correct and that the blades are not obstructed. If the noise comes from the motor, it is lubricated for life and does not require oil. If the bearings are noisy, replace the fan assembly (motor + impeller wheel).

What are the wiring options for this fan?

Two options are possible: Option 1: one switch for automatic fan (humidity) and a second for light (fan on with light optional). Option 2: three switches: one for automatic fan, one for manual override (odors), and one for light. Refer to the wiring diagrams in the manual.

Can I install this fan in a wall or above a cooktop?

No, this product is designed only for installation in a flat ceiling. It must not be installed above a cooking area (keep a 45° angle from the cooking appliance).

How to select the airflow (CFM) on the AE80SL model?

Some models allow you to choose between 50, 80, or 110 CFM using a selector on the housing. Adapt the airflow to the room size and desired ventilation level. A shorter and straighter duct improves efficiency.

What is the timer for on the Flex AE80SL fan?

The timer determines how long the fan runs after a humidity rise or after manual activation. It is adjustable via the "MINUTES" control (usually 1 to 60 minutes). Cut power to adjust the potentiometer.

How does the humidity sensor work?

The sensor reacts to a rapid or moderate rise in humidity (e.g., shower) or to a relative humidity level above the set threshold (50-80%). It can also trigger due to ambient changes. The fan automatically stops when humidity drops.

Where to find spare parts and technical support?

Check Broan.com or NuTone.com for parts and product registration. Phone support: USA 800-637-1453, Canada 877-896-1119. For parts, look for the fan assembly, grille, light module, or control box.

USER MANUAL Flex AE80SL BROAN

Roomside / Flex™ Series Humidity Sensing Fan/Light READ AND SAVE THESE INSTRUCTIONS

WARNING

TO REDUCE THE RISK OF FIRE, ELECTRIC SHOCK, OR INJURY TO PERSONS, OBSERVE THE 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 Protection Association (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. Acceptable for use over a tub or shower when connected to a GFCI (Ground Fault Circuit Interrupter) - protected branch circuit (ceiling installation only).
8. It is recommended to wear safety glasses and gloves during installation.
9. This unit must be grounded.
10. Monitor your fan for unusual sounds, smells and smoke. If any appear, turn off the fan immediately and replace it.

CAUTION

1. For general ventilating use only. Do not use to exhaust hazardous or explosive materials and vapors.
2. For installation in flat ceilings only. Do not mount this product in a wall.
3. To avoid motor bearing damage and noisy and/or unbalanced impellers, keep drywall spray, construction dust, etc. off power unit.
4. DÓ NOT TOUCH THE HUMIDITY-SENSING CIRCUIT BOARD. Electrostatic discharge may damage the circuit board.
5. Please read specification label on product for further information and requirements.

CLEANING & MAINTENANCE

For quiet and efficient operation, long life, and attractive appearance - lower or remove grille and vacuum interior of unit with the dusting brush attachment.

The motor is permanently lubricated and never needs oiling. If the motor bearings are making excessive or unusual noises, replace the blower assembly (includes motor and impeller).

SENSOR CLEANING

The humidity sensor is mounted in the control housing. The sensor will operate most reliably when cleaned occasionally as follows:

1. Disconnect power at service entrance.
2. Remove the grille. 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!

For Warranty Statement, Service Parts, Technical Support, or to Register your product, please visit our website or call: In the United States - Broan.com 800-637-1453 or NuTone.com 888-336-6151. In Canada - Broan.ca or NuTone.ca 877-896-1119

OPERATION

The humidity sensor, fan and light can be operated separately. Use a 2- or 3-function wall control.

Flex™ Series Humidity Sensing Fan/Light ONLY: Do not use a speed control to operate the humidity sensor or the fan.

SENSOR OPERATION

This humidity-sensing fan uses a sophisticated humidity sensor that responds to: (a) rapid to moderate increases in humidity or (b) humidity above a set-point. The humidity sensor may occasionally turn the fan ON when environmental conditions change.

MANUAL ON WITH TIMED OFF

This humidity sensing fan has an additional operation feature. For odor or vapor control, the fan can be energized by cycling the power switch. Once the fan has been energized in this manner, it will remain on for the set timer period.

To manually energize the fan:

1. If fan power switch is already ON, proceed to Step 2; otherwise, turn power switch ON for more than 1 second.
2. Turn fan power switch OFF for less than 1 second.
3. Turn fan power switch back ON and fan will turn ON.

% HUMIDITY ADJUSTMENT

%HUMIDITY has been factory set at 80% for most shower applications. If fan is not responding to changing humidity conditions, adjust toward 50%. If fan is responding too often to changing humidity conditions, adjust toward 80%. If fan is still responding too often at 80%, contact Broan Technical Support.

To adjust the %HUMIDITY:

1. Turn power off at electrical service panel.
2. Use a small screwdriver to carefully rotate %HUMIDITY control to desired level.
3. Turn power on.
4. Repeat above steps if necessary.

MINUTES ADJUSTMENT (TIMER)

This humidity-sensing fan has a timer that controls how long the fan remains on after (a) rise in humidity and (b) humidity level are both below the user-adjustable %HUMIDITY setting, or after being energized by cycling power switch.

To adjust the timer:

1. Disconnect power at electrical service panel.
2. Use a small screwdriver to carefully rotate MINUTES control to increase or decrease time.
3. Turn power on.
4. Repeat above steps if necessary.

IMPORTANT - The ducting from this fan to the outside of the building has a strong effect on the air flow, noise and energy use of the fan. Use the shortest, straightest duct routing possible for best performance, and avoid installing the fan with smaller ducts than recommended. Insulation around the ducts can reduce energy loss and inhibit mold growth. Fans installed with existing ducts may not achieve their rated airflow.

OPTION - To mount housing anywhere between ceiling framing: Use optional Hanger Bar Kit (sold separately from local distributors or website). Follow mounting instructions included with kit.

ALL INSTALLATIONS

1 Remove all packing material, unplug and remove blower from fan housing.

Two technical diagrams showing mechanical assembly and tool insertion, no text or symbols present

2 Remove wiring panel from fan housing (if already installed).

Illustration of hands installing or adjusting a mechanical component with an upward arrow (no text or symbols)

1. The models only: Select 50, 80 or 110 CFM based on your room size and desired air flow.
   

4 Some models only: A pair of flanges may be attached to housing if desired or required.

Snap both flange pieces under rolled-over edge of housing (all four sides).

Technical line drawing of a mechanical housing or enclosure with mounting brackets and internal components (no text or symbols)

For Retrofit Installation - Skip to Page 3.

NEW INSTALLATION

5 Attach damper/duct connector to fan housing.

Push connector through opening from inside of housing.

Engage tabs and secure with screw from parts bag.

6 Mount housing to ceiling structure.

Make sure bottom of housing will be flush with finished ceiling.

For proper location using 12 " ceiling material: Bend out housing tabs (on outside of housing) to fit against bottom of joist.

Secure housing through mounting ears with appropriate fasteners. If mounting housing to I-joist, use wood blocking as shown.

7 Connect 4-in. round duct.

8 Connect wiring.

Connect power cable to wiring plate (from parts bag) using UL approved connector. Connect house wiring to fan wiring. Refer to wiring diagrams for connection details.

Use screw (from parts bag) to secure wiring plate to fan housing. Re-install wiring panel and secure with screw from parts bag.

Illustration of a hand using a tool to cut or inspect a small electronic component (no text or symbols visible)

9 Install housing mask.

Place mask into housing opening to prevent drywall spr and constr damaging

10 Finish ceiling. Then continue with Step 11.

RETROFIT INSTALLATION

5 Remove old fan and prepare ceiling.

Enlarge ceiling opening (if necessary) to 9 ^3/4 " parallel to joist) by 10 ^1/2 " (perpendicular to joist). (Some models have a cut-out template on side of carton.)

Diagram of a mechanical assembly with a tool and component, no visible text or symbols

6 Fold mounting ears flat against housing.

Hand inserting a component into a 3D box with arrows indicating rotation (no text or symbols)

Existing fan housings are typically attached to the structure:

• with screws, nails, or staples, which must be removed.
• with hangers or rails which are fastened to joists and must be removed along with housing.
  A pry bar may be needed to remove the old housing.
  Leave ductwork and wiring in place.

7 Connect wiring.

Connect power cable to wiring plate (from parts bag) using UL approved connector. Connect house wiring to fan wiring. Refer to wiring diagrams for connection details. Use screw (from parts bag) to secure wiring plate to fan housing. Re-install wiring panel and secure with screw from parts bag.

Technical diagram of a mechanical or electrical component with wires and connectors (no text or symbols visible)

Hand holding a tool interacting with a device inside a box (no visible text or symbols)

8 Mount fan to ceiling structure.

Mount housing to ceiling structure with appropriate fasteners in locations shown.

Hand holding a handheld device with arrows indicating motion or force (no text or symbols visible)

9

Connect 4-in. round duct.

① Pull existing ducting through housing discharge opening and ② tape ducting to duct connector. ③ Push connector/ducting back through opening. Engage tabs and ④ secure with screw from parts bag.

Continue with Step 11.

ALL INSTALLATIONS

11

Install blower.

Re-install blower removed in Step 1. Secure blower with 2 screws from parts bag. Plug blower into black receptacle. Flex™ Series Humidity Sensing Fan/ Light ONLY: Plug 5-wire plug into controller module.

Illustration of a hand holding a tool interacting with a mechanical component (no text or symbols visible)

Illustration of a hand holding a small object, possibly a tool or device, with no visible text or symbols.

Technical diagram of a mechanical component with internal gear and housing (no text or symbols)

12

Install grille.

Humidity Sensing LED Fan/Light ONLY: Snap light module into inside of grille. Plug in light module and sensor wires. Squeeze grille springs and insert into slots in blower. Push grille up against ceiling.

Depending upon model - your grille may look different.

Diagram of a mechanical device with a central component and cable, showing no text or symbols

Diagram of a mechanical device with a handle and internal components, no visible text or symbols

Illustration of two hands holding a fan or panel with a grid pattern (no text or symbols)

Technical line drawing of a roof structure with a hook and pipe connection (no text or symbols)

If grille spring becomes dislodged from grille - snap it back into place as shown.

WIRING DIAGRAMS

WIRING OPTION #1

• When first switch (1) is ON, fan will operate automatically, based on room humidity conditions.
• Turn fan ON immediately for the set timer period (to control odors), by cycling first switch.
• Use second switch (2) to turn light ON/OFF.
• With optional connection shown, fan will always be ON when light is ON.

graph TD
    A["1) FAN (AUTO/OFF)"] --> B["COM"]
    B --> C["RED"]
    C --> D["BLK"]
    D --> E["Light"]
    E --> F["Optional"]
    F --> G["BRN"]
    G --> H["HUMIDITY CONTROL"]
    H --> I["WHT"]
    I --> J["WHTWHT"]
    J --> K["WHT"]
    K --> L["WHTWHT"]
    L --> M["SWITCH UNIT"]
    N["120 VAC LINE"] --> O["BLK GRD"]
    O --> P["GRD"]
    P --> Q["BRN"]
    Q --> R["HUMIDITY CONTROL"]
    R --> S["WHT"]
    S --> T["WHTWHT"]
    U["2) LIGHT (ON/OFF)"] --> V["COM"]
    W["SWITCH UNIT"] --> X["BRDN"]

WIRING OPTION #2

• When first switch (1) is ON, fan will operate automatically based on room humidity conditions.
• Turn fan ON immediately (to control odors) by using second switch (2).
• Use third switch (3) to turn light ON/OFF.

graph TD
    A["3-FUNCTION CONTROL (PURCHASE SEPARATELY)"] --> B["(1) FAN AUTO (AUTO/OFF)"]
    A --> C["(2) FAN (ON/OFF)"]
    A --> D["(3) LIGHT (ON/OFF)"]
    B --> E["BRN"]
    C --> F["BRN"]
    D --> G["BRN"]
    E --> H["SWITCH"]
    F --> I["SWITCH"]
    G --> J["SWITCH"]
    H --> K["UNIT"]
    I --> L["UNIT"]
    J --> M["UNIT"]
    K --> N["UNIT"]
    style A fill:#f9f,stroke:#333
    style B fill:#ccf,stroke:#333
    style C fill:#ccf,stroke:#333
    style D fill:#ccf,stroke:#333
    style E fill:#cfc,stroke:#333
    style F fill:#cfc,stroke:#333
    style G fill:#cfc,stroke:#333
    style H fill:#fcc,stroke:#333
    style I fill:#fcc,stroke:#333
    style J fill:#fcc,stroke:#333
    style K fill:#fcc,stroke:#333
    style L fill:#fcc,stroke:#333
    style M fill:#fcc,stroke:#333

1100264E

MISE EN MARCHE MANUELLE AVEC ARRÊT DIFFÉRÉ

Technical line drawing of a mechanical assembly with a central circular component and mounting bracket (no text or symbols)

Two technical diagrams showing a hand operating a mechanical device with a tool, no text or symbols present.

Illustration of hands installing or adjusting a mechanical component with an upward arrow (no text or symbols)

Technical line drawing of a mechanical housing or enclosure with mounting brackets and internal components (no text or symbols)

Technical line drawing of a mechanical or electrical component with wires and connectors (no text or symbols)

Illustration of a hand holding a tool interacting with a small electronic device inside a box (no text or symbols visible)

9

10

Diagram of a mechanical assembly with a tool and component, no visible text or symbols

6

Illustration of a hand using a tool to adjust or install a small electronic component (no text or symbols visible)

8

Illustration of a hand holding a handheld device with arrows indicating motion or force (no text or symbols)

9

Raccordez un conduit rond de 10 cm (4 po).

Illustration of a hand using a tool to adjust or install a mechanical component (no text or symbols visible)

Illustration of a hand holding a small mechanical component (no text or symbols visible)

Diagram of a mechanical device with a central component and cable, showing no text or symbols

Diagram of a robotic arm operating a mechanical device with a mesh chamber (no text or symbols visible)

Illustration of two hands holding a fan or grille device (no text or symbols visible)

Technical line drawing of a roof structure with diagonal bracing and support beams (no text or symbols)

Technical line drawing of a mechanical assembly with a circular component and internal components (no text or symbols)

%HUMEDAD

Two technical diagrams showing mechanical assembly steps: one with tool and rotation, the other with hand and upward arrow (no text or symbols)

Illustration of hands installing or adjusting a mechanical component with an upward arrow (no text or symbols)

Technical line drawing of a mechanical housing or enclosure with mounting brackets and internal components (no text or symbols)

Technical line drawing of an electrical enclosure with wiring and components (no text or symbols)

Illustration of a hand holding a tool interacting with an open electronic device (no text or symbols visible)

9

Technical line drawing of a mechanical assembly with no visible text or symbols

6

Hand inserting a component into a device housing (no text or symbols visible)

Illustration of a hand holding a tool interacting with an open electrical box (no text or symbols visible)

8

Illustration of a hand using a tool to adjust or install a mechanical component (no text or symbols visible)

Illustration of a hand holding a small mechanical component (no text or symbols visible)

12

Instale la rejilla.

Diagram of a mechanical device with a central component and cable, showing no text or symbols

Diagram of a mechanical device with a handle and meshed base, no visible text or symbols

Illustration of two hands holding a fan or panel with a grid pattern (no text or symbols)

Diagram of a roof structure with a chimney and curved roof elements (no text or symbols)