BROAN 508MX Automatic Wall Fan Instructions

: June 6, 2024
: Broan

Table of Contents

508MX Automatic Wall Fan
WARNING
CAUTION
TOOLS AND MATERIALS REQUIRED
TYPICAL INSTALLATION
PREPARE FAN
INSTALL FAN
USE AND CARE
SERVICE PARTS
References
Read User Manual Online (PDF format)
Download This Manual (PDF format)

508MX Automatic Wall Fan

Instructions Manual

MODELS: 508, 508MX, 509, 509S &509SMX

To register this product visit
www.broan-nutone.com
www.broan-nutone.ca

READ AND SAVE THESE INSTRUCTIONS

WARNING

TO REDUCE THE RISK OF FIRE, ELECTRIC SHOCK, OR INJURY TO PERSONS, OBSERVE THE FOLLOWING:

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.
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.
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.
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 safey 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.
When cutting or drilling into wall or ceiling, do not damage electrical wiring and other hidden utilities.
Ducted fans must always be vented to the outdoors.
If this unit is to be installed over a tub or shower, it must be marked as appro-priate for the application.
Never place a switch where it can be reached from a tub or shower.
This unit must be grounded.

TO REDUCE THE RISK OF A RANGE TOP GREASE FIRE:

Never leave surface units unattended at high settings. Boilovers cause smok-ing and greasy spillovers that may ignite. Heat oils slowly on low or medium settings.
Always turn hood ON when cooking at high heat or when cooking flaming foods.
Clean ventilating fans frequently. Grease should not be allowed to accumulate on fan or filter.
Use proper pan size. Always use cookware appropriate for the size of the surface element.

**TO REDUCE THE RISK OF INJURY TO PERSONS IN THE EVENT OF A RANGE TOP GREASE FIRE, OBSERVE THE FOLLOWING:***

SMOTHER FLAMES with a close-fitting lid, cookie sheet, or metal tray, then turn off the burner. BE CAREFUL TO PREVENT BURNS. If the flames do not go out immediately, EVACUATE AND CALL THE FIRE DEPARTMENT.
NEVER PICK UP A FLAMING PAN – You may be burned.
DO NOT USE WATER, including wet dishcloths or towels – a violent steam explosion will result.
Use an extinguisher ONLY if:
A. You know you have a Class ABC extinguisher and you already know how to operate it.
B. The fire is small and contained in the area where it started.
C. The fire department is being called.
D. You can fight the fire with your back to an exit.

*Based on “Kitchen Firesafety Tips” published by NFPA.

CAUTION

For general ventilating use only. Do not use to exhaust hazadous or explosive materials and vapors.
To avoid motor bearing damage and noisy and/or unbalanced impellers, keep drywall spray, construction dust, etc. off power unit.
Please read specification label on product for further information and require-ments.

TOOLS AND MATERIALS REQUIRED

Straight blade screwdriver
Drill, electric or ratchet drive
Hammer
Pliers
1–1/4” Spade bit
Circular saw
Saber saw
Tape measure or ruler and pencil
Electrical supplies of type needed to comply with local codes
High quality caulking compound

INSTALLER: Leave This Manual With The Homeowner.

HOMEOWNER: Use and Care Information on Page 4.

TYPICAL INSTALLATION

This unit mounts between walls 4-1/2” to 9-1/2” thick. Outside housing flange is fastened to casing strips (1 x 2’s). See Fig. 1. If sheathing behind siding is not wood, provide extra supports between walls (nailed or screwed to siding).

PREPARE FAN

Remove motor assembly by loosening mounting screws, rotating assembly and lifting motor assembly out of inner housing. (FIG. 2)
Use care when handling motor bracket assembly to prevent damage to blade. Do not set down assembly with weight of motor resting on the blade.
Pull inner housing out of outer housing.
Remove wiring knockout from bottom of wiring box (provided in plastic parts bag). (FIG. 2)

NOTE: Remove bottom knockout ONLY!

INSTALL FAN

Choose location on inside wall. Make sure that wall stud does not run through opening. Lay out hole on wall. (FIG. 3)

NOTE: If fan is installed above a cooking surface, grille center must be located at least 58” above floor or at least 22” above heat source.

509S, 509SMX ONLY. Lay out smaller hole for rotary switch as shown in Figure 3.
Transfer center of hole to outside wall.
Cut out hole on inside wall.
Lay out 14-1/2” square around center location transferred from inside room. (FIG. 4)
Cut square hole in SIDING ONLY! DO NOT CUT SHEATHING (FIG. 5)! Nail down all siding ends.
Cut round hole for fan housing in sheathing. (FIG. 6)
Nail or screw 1×2 casing strips inside square opening. (FIG. 7)
Put a large bead of caulk on the inside of flange on outer housing. (FIG. 8)
If wall is less than 8” thick, remove one or more knockouts on outer sleeve. (FIG. 8) Use inner sleeve for test fit.
Insert outer housing through hole on outside wall and nail or screw housing to casing strips. Caulk all around filler strips and flange. (FIG. 9)
Run wiring to fan location. Pull wire through both sleeves. (FIG. 10) Insert inner sleeve into opening and fasten sleeves together with three black sheet metal screws provided in plastic bag.
Attach wiring to wiring box with proper connector for type of wire being used. Drop box into opening in housing.
509S, 509SMX ONLY! Insert switch into wiring box and fasten with nut provided. (FIG. 11)
Make electrical connections as shown in Figures 12 and 12A. Make sure unit is grounded using green ground screw.
Install wiring box cover. Use two screws provided in plastic bag.
Reinstall motor assembly and plug in motor.
Fasten grille to motor bracket with knob and stud from parts bag. 509S, 509SMX ONLY: Attach knob to rotary switch. (FIG. 13)

USE AND CARE

DISCONNECT ELECTRICAL POWER SUPPLY

BEFORE SERVICING FAN.
Always unplug the fan motor before servicing the fan. The motor is permanently lubricated and will never need oiling.
Clean the grill in warm, soapy water. Use a mild detergent, such as a dishwashing liquid. D O NOT USE ABRASIVE CLOTHS, STEEL WOOL OR SCOURING POWDERS.
Clean the fan blade and motor every six months by removing the grille, unplugging the motor, and gently vacuuming the fan blade and motor.