BROAN QTXE110S2 Humidity Sensing Fan Instruction Manual

BROAN QTXE110S2 Humidity Sensing Fan

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.
8. This unit must be grounded.

CAUTION

1. For general ventilating use only. Do not use to exhaust hazardous or explosive materials and vapors.
2. This product is designed 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.
3. Please read specification label on product for further information and requirements.

OPERATION

The humidity control and fan can be operated separately. Use a 1 or 2-function wall control. Do not use a dimmer switch to operate the humidity control or light. See “Connect Wiring” for details.

SENSOR OPERATION
This humidity-sensing fan responds to: (a) rapid to moderate humidity increases and (b) humidity above a 50%-80% relative humidity (RH) set-point. (a) and (b) are set with “HUMIDITY” adjustment. Fan may occasionally turn on when environmental conditions change. If the fan continuously responds to changing environmental conditions, “HUMIDITY” 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 grille 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 “MINUTES” 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.

HUMIDITY ADJUSTMENT
“HUMIDITY” has been factory set for most shower applications. If the fan is in a tub area or is used for dampness control, the “HUMIDITY” may need to be decreased toward 50% RH. If the control is responding too often to changing environmental conditions, adjustment toward 80% RH may be required. To adjust the “HUMIDITY”:

1. Turn power off at electrical service panel.
2. Through the grille, locate the “HUMIDITY” screwdriver slot.
3. Using a small, flat-blade screwdriver, carefully rotate “HUMIDITY” adjustment toward 50 or 80.
4. Turn power on and check operation by turning on shower or other humidity source until fan turns on.
5. 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 “HUMIDITY” setting or after being energized by cycling power switch.
To adjust the timer:

1. Disconnect power at electrical service panel.
2. Through the grille, locate the “MINUTES” screwdriver slot.
3. Using a small, flat-blade screwdriver, carefully rotate “MINUTES” adjustment to desired setting (5 to 60 minutes).
4. 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.
5. Check timer setting with watch or clock after turning humidity source off if it was turned on it Step 4.
6. Repeat above steps if necessary.

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 motor/blower wheel assembly.
SENSOR CLEANING
The humidity sensor is mounted in the grille. 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!

TYPICAL INSTALLATIONS

PLAN THE INSTALLATION

Choose the installation location.

The location of your humidity sensing fan is very important. Use the following guidelines for best operation:

• Locate unit above (GFCI protected circuit required) or within 5 feet of shower head.
• Locate unit away from heating or cooling sources which can affect humidity levels.
• Do not locate near window. Unit may respond to the outdoor humidity level.
• Unit must be installed in ceiling to properly sense moisture.
• Locate unit only on flat ceilings up to 12 feet high for proper sensing.
• 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.

Plan the wiring

• Plan to supply the unit with proper line voltage and appropriate power cable. Power cable should be routed to the switch box first and then to the unit (See “CONNECT WIRING” on page 3).
• Do not operate this unit with a speed control. Damage to the sensor unit will result.

INSTALL HOUSING & DUCT

Mount housing to joist or I-joist.

Use a pliers to bend housing TABS out to 900. Hold housing in place so that the housing tabs contact the bottom of the joist. The housing mounts with four (4) screws or nails. Screw or nail housing to joist through lowest holes in each mounti n g flange, then through highest holes.

NOTE: Mounting to I-JOIST (shown) requires use of SPACERS (included) between the highest hole of each mounting flange and the I-joist.

Mount housing anywhere between trusses, joists, or I-joists using hanger bars.

Sliding hanger bars are provided to allow for accurate positioning of housing anywhere between framing. They can be used on all types of framing (I-joist, standard joist, and truss construction) and span up to 24”

Attach the MOUNTING CHANNELS to the housing using the SCREWS supplied. Make sure TABS face “up” as shown. Use the set of channel mounting holes (marked “STD”) to mount the housing flush with the bottom of the drywall. Use the other set of holes (not marked) to mount the housing flush with the top of the drywall.

• Extend HANGER BARS to the width of the framing.
• Hold ventilator in place with the hanger bar tabs wrapping around the BOTTOM EDGE OF THE FRAMING.
• NAIL ventilator to framing or fasten with screws (not provided) through HOLES near nails.
• To ensure a noise-free mount: Secure hanger bars together with SCREWS or use a pliers to crimp mounting channels tightly around hanger bars.

Attach damper/duct connector

• Snap damper / duct connector onto housing. Make sure connector is flush with top of housing and damper flap falls closed.

Install 6-inch round ductwork.

• Connect 6-inch round ductwork to damper / duct connector. Run ductwork to a roof cap or wall cap. Tape all ductwork connections to make them secure and air tight.

CONNECT WIRING

Connect electrical wiring

Run 120 VAC house wiring to installation location. Use proper UL approved connector to secure house wiring to wiring plate. Connect wires as shown in wiring diagrams.

Finish ceiling.

• Install ceiling material. Cut out around housing.

Plug in wiring.

• Plug wiring into the proper receptacles

Attach grille to housing.

• Squeeze grille springs and insert them into slots on each side of housing.

• Push grille against ceiling.

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References

• Broan-NuTone | Better Air. Better Life.
• Manual-Hub.com – Free PDF manuals!

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