BELS8 Roomside Series Humidity Sensing Fan/Light

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. This unit must be grounded.
9. Do not use this fan with any solid-state speed control device.
10. Do not use replacement parts that have not been recommended by Broan NuTone LLC.
11. If the fan makes excessive noise or if there is unusual noise or smells of smoke. Disconnect power supply and contact customer service.
12. The wearing of safety glasses and gloves is recommended when installing, maintaining or cleaning the unit to reduce the risk of injury that could be caused by the presence of thin metal and/or moving parts.

CAUTION

1. For general ventilating use only. Do not use to exhaust hazardous or explosive materials and vapors.
2. Install the fan at least 8 feet (2.4 m) above the floor.
3. To avoid motor bearing damage and noisy and/or unbalanced impellers, keep drywall spray, construction dust, etc. off power unit.
4. DO 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

TO CLEAN THE GRILLE:

Remove the grille and grille trim. Plastic parts can be cleaned with mild detergent, such as dishwashing liquid. Dry with a soft cloth. DO NOT USE ABRASIVE CLOTH, STEEL WOOL PADS OR SCOURING POWDERS.

TO CLEAN INTERIOR OF THE UNIT:

Once the grille and grille trim are removed, gently vacuum interior of the unit with the dusting brush attachment.

TO CLEAN THE SENSOR:

Remove the grille and grille trim. 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. DO NOT USE cleaning sprays, solvents or water on or near sensor!

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).

OPERATION

Use an on/off switch to operate the fan, light and sensor. The fan, light and sensor can be operated separately if an appropriate 3-function wall control is used. Refer to Broan-NuTone catalog for a complete line of accessories/controls to effectively adapt these fans to your requirements.

SENSOR OPERATION

To activate the humidity sensor, turn the humidity switch ON. The fan will run automatically when the set Humidity condition is met, and stop automatically when the timer condition is met. The Humidity Sensor may occasionally turn the fan ON when environmental conditions change.

% HUMIDITY ADJUSTMENT

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. If fan is not responding to changing humidity conditions, adjust towards 50%. If fan is responding too often to changing humidity conditions, adjust towards 100%.
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 the humidity in the room returns to the user-adjustable set-point.

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.

If fan is still not responding as desired after making adjustments, contact Broan Technical Support.

MANUAL ON

To manually energize the fan:

• Turn the fan only switch on
• or
• Cycle the Humidity switch on/off/on.

Installation Guidelines

Location Considerations:

COOKING AREA: Do not install above or inside this area. NOT FOR USE IN A COOKING AREA.

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.

Mounting Options:

ROOF CAP* (with built-in damper)

WALL CAP* (with built-in damper)

* Purchase separately.

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.

QUICK START GUIDE

Step 1: Remove from packaging.

Remove blower assembly and wiring panel.

Step 2: Mount housing.

Choose one option to mount housing to ceiling structure:

New Construction:

Mount housing using mounting ears, potentially with wood blocking if required.

Retrofit:

Bend the ears inward and use the mask from packaging to cut the opening to the correct size.

Other options:

• Hanger bars (sold separately Model Number MHB4)
• Flange Install (see Installation video)

Step 3: Choose one option to attach duct connector.

New Construction:

Install duct connector (use screw from parts bag and ensure tabs engage in housing), then attach new construction ductwork with foil tape.

Retrofit:

Pull ductwork into housing and attach to duct connector with foil tape, then install duct connector (use screw from parts bag and ensure tabs engage in housing).

Pro Tip: First and last 18" of the ducting should be rigid or stretched straight for expected performance.

Step 4: Connect wiring.

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 (1) ON/OFF/ON.
• Use second switch (2) to turn light ON/OFF.
• With optional connection shown, fan will always be ON when light is ON.

(Requires 2-FUNCTION CONTROL, purchased separately)

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.

(Requires 3-FUNCTION CONTROL, purchased separately)

Step 5: Attach wire enclosure by tab and screw.

Step 6: Re-install wiring panel and secure with screw from parts bag.

Step 7: Install the blower assembly and sensor with provided screws.

Plug in blower. Plug in sensor. Note: For new construction, use mask to protect blower until ceiling is finished.

Step 8: Install the grille trim with screws from parts bag.

Step 9: Plug in LED module.

Step 10: Install the grille by sliding clips into grille trim.

Note: Depending upon model, your grille may look different.