Best IM42I50B Installation

Models IM42I50B & IM42I50W

ENGLISH.................................... 2

FRANÇAIS.................................17

ESPAÑOL.................................. 33

In USA - BEST Hartford, Wisconsin
In CANADA - BEST Drummondville, QC, Canada

REGISTER YOUR PRODUCT ONLINE AT : www.BestRangeHoods.com/register

For additional Information visit www.BestRangeHoods.com

READ AND SAVE THESE INSTRUCTIONS

!

!

INTENDED FOR DOMESTIC COOKING ONLY

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 service panel 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
guidelines 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. Do not use this unit with any separate solid-state speed control device.

8. To reduce the risk of fire, use only metal ductwork.

GROUNDING INSTRUCTIONS

This appliance must be grounded. In the event of an electrical short circuit, grounding reduces the
risk of electrical shock by providing an escape wire for the electric current. This appliance is equipped
with a cord having a grounding wire with a grounding plug. The plug must be plugged into an outlet
that is properly installed and grounded.

WARNING - Improper grounding can result in a risk of electric shock.
Consult a qualified electrician if the grounding instructions are not completely understood, or if doubt

exists as to whether the appliance is properly grounded.
Do not use an extension cord. If the power supply cord is too short, have a qualified electrician install

an outlet near the appliance.

- 2 -

!

WARNING

TO REDUCE THE RISK OF A RANGE TOP GREASE FIRE:

A. Never leave surface units unattended at high settings. Boilovers cause smoking and greasy

spillovers that may ignite. Heat oils slowly on low or medium settings.

B. Always turn hood ON when cooking at high heat or when flambeing food (i.e. Crepes Suzette,

Cherries Jubilee, Peppercorn Beef Flambe’).

C. Clean ventilating fans frequently. Grease should not be allowed to accumulate on fan or filter.
D. 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:*

1. 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.

2. NEVER PICK UP A FLAMING PAN - You may be burned.

3. DO NOT USE WATER, including wet dishcloths or towels - violent steam explosion will result.

4. 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 Fire Safety Tips” published by NFPA.

CAUTION

1. For indoor use only.

2. To reduce risk of fire and to properly exhaust air, be sure to duct air outside. Do not vent exhaust

air into spaces within walls or ceilings or into attics, crawl spaces, or garages.

3. Take care when using cleaning agents or detergents.

4. Avoid using food products that produce flames under the Range Hood.

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

vapors.

6. To avoid motor bearing damage and noisy and/or unbalanced impellers, keep drywall spray,

construction dust, etc. off power unit.

7. Your hood motor has a thermal overload which will automatically shut off the motor if it becomes

overheated. The motor will restart when it cools down. If the motor continues to shut off and
restart, have the hood serviced.

8. For best capture of cooking impurities, the bottom of the hood should be a minimum of 23½”

and a maximum of 30½” above the cooking surface. See “Install Mounting Bracket” section for
mounting restrictions.

9. Two installers are recommended because of the large size and weight of this hood.

10. This product is equipped with a thermostat which may start blower automatically. To reduce

the risk of injury and to prevent power from being switched on accidentally, switch power off at
service panel and lock or tag service panel.

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

- 3 -

OPERATION

Hood Controls

The lights and blower are operated using the (5) push buttons located on the underside of the

hood. Fig. 1. It can also be controlled with an optional remote control (Model ACR1).

Ten Minute Delay

Press Speed 1, Speed 2, or Speed 3 for two (2) seconds when the blower is running at the
selected speed. The LED below the button will start blinking to display the delay function. After
ten (10) minutes, the blower will automatically turn off. If you change the speed while the timer
is running, the function will not deactivate. To deactivate the function, press the button with the
blinking LED for two (2) seconds. Note: The delay is not available for Speed 4.

Filter Alarm

After 30 hours of blower operation, the filter alarm is activated and all of the LED indicators
will turn on. The alarm is activated when the motor is off and the LED’s will remain on for 30
minutes. To deactivate the alarm, press any of the control buttons for two (2) seconds while
the LED’s are on.

After 120 hours of blower operation, the charcoal filter alarm is activated and all of the LED
indicators will blink. The alarm is activated when the motor is off and the LED’s will remain
on for 30 minutes. To deactivate the alarm, press any of the control buttons for two seconds
while the LED’s are on.

On / Off

Lights

Blower

Speed 1

Blower

Speed 2

Blower

Speed 3

Blower

Speed 4

FIG. 1

HEAT SENTRY™

Your hood is equipped with a HEAT SENTRY™ thermostat. This thermostat is a
device that will turn on or speed up the blower if it senses excessive heat above
the cooking surface.

1) If blower is OFF - it turns blower ON to HIGH speed.

2) If blower is ON at a lower speed setting - it turns blower up to HIGH speed.

When the temperature level drops to normal, the blower will return to its original setting.

WARNING
The HEAT SENTRY thermostat can start the blower even if the hood is turned OFF. When
this occurs, it is impossible to turn the blower OFF with its switch. If you must stop the
blower, do it from the main electrical panel.

- 4 -

HALOGEN BULBS

!

This range hood requires two halogen bulbs
(Type MR11, 12 Volt, 20 Watt Max, G4 2-pin
Base).

WARNING: Always switch off the

electrical supply before carrying out any
operation on the appliance.

To remove old bulbs:
Pull downward (DO NOT ROTATE). Fig. 2.

CAUTION: Bulbs may be hot.

To install new bulbs:
Align pins with holes in lamp socket. Push bulb up until securely seated. Use only Type MR11,
12 Volt, 20 Watt Max., G4 2-pin base replacement bulbs.

FIG. 2

CLEANING AND MAINTENANCE

Proper maintenance of the Range Hood will assure proper performance of the unit.

Motor

The motor is permanently lubricated and never needs oiling. If the motor bearings make excessive or
unusual noise, replace the motor with the exact service motor. The impeller should also be replaced.

Grease Filter

The grease filter should be cleaned frequently. Use a warm detergent solution. Grease filter is dishwasher
safe.

Clean all-metal filters in the dishwasher using a non-phosphate detergent. Discoloration of the filter may
occur if using phosphate detergents, or as a result of local water conditions - but this will not affect filter
performance. This discoloration is not covered by the warranty.

See “INSTALL FILTERS” section for removal and installation instructions.

Non-ducted Recirculation Filter

The non-ducted recirculation filter should be changed every 6 months. Replace more often if your
cooking style generates extra grease, such as frying and wok cooking. See “INSTALL FILTERS” section
for removal and installation instructions.

Stainless Steel Cleaning

DO:

• Regularly wash with clean cloth or rag soaked
with warm water and mild soap or liquid dish
detergent.

• Always clean in the direction of original polish
lines.

• Always rinse well with clear water (2 or 3 times)
after cleaning. Wipe dry completely.

• You may also use a specialized household
stainless steel cleaner.

DON’T:

•

Use any steel or stainless steel wool or any
other scrapers to remove stubborn dirt.

• Use any harsh or abrasive cleansers.

• Allow dirt to accumulate.

• Let plaster dust or any other construction
residues reach the hood. During construction/
renovation, cover the range hood to make sure
no dust sticks to the stainless steel surface.

Avoid: When choosing a detergent

• Any cleaners that contain bleach will attack stainless steel

• Any products containing: chloride, fluoride, iodide, bromide will deteriorate surfaces rapidly.

• Any combustible products used for cleaning such as acetone, alcohol, ether, benzol, etc., are highly
explosive and should never be used close to a range.

- 5 -

PREPARE THE HOOD

Unpack hood and check contents. Fig. 3.
You should receive:
1 - Hood Body
1 - Filter Assembly
1 - Installation Template
1 - Downrod Assembly
1 - Installation Instructions
1 - Parts Bag containing:
6 - Hex Head Lag Bolt, M6 x 60 mm
6 - Flat Washers, 6 mm
6 - Hex Head Screws, M5 x 15 mm

3 - Socket Head Set Screw
1 - Hex Key
1 - Wire Guard

WASHER 6 MM

(6)

DOWNROD ASSEMBLY

HOOD BODY

FILTER ASSEMBLY

SET SCREW

(3)

WIRE GUARD

- 6 -

LAG

BOLTS

(6)

HEX HEAD

SCREW

M5 X 15 MM

(6)

HEX KEY

FIG. 3

STRUCTURAL
REQUIREMENTS

1. Install a 2-in. x 8-in. wooden support
directly above and centered over the
cooktop. Securely fasten this support to
ceiling joists or second story floor joists. It
must be capable of supporting the weight
of the hood. Fig. 4.

2. After the ceiling is finished, center the
mounting template over the cooktop with
“FRONT” toward the user. Fig. 5.

3. Mark and drill (6) 1/8-in. diameter holes
through the ceiling material and into the
support frame.

3. Mark and drill a hole through the finished
ceiling material (and support frame as
necessary) for the electrical supply cable.

INSTALL DOWNROD
ASSEMBLY

CEILING JOISTS OR

2nd STORY FLOOR JOISTS

2-IN. X 8-IN. SUPPORT
(centered over cooktop)

1/8-IN. DIA.

MOUNTING HOLES (6)

ELECTRICAL SUPPLY

CABLE HOLE

FIG. 4

FIG. 5

1. Remove (2) screws from the decorative
ceiling cover and lower the cover to gain
access to the wiring box and mounting
bolts. Fig. 6.

2. Use (6) hex head lag bolts and (6) wash­ers (provided) to fasten the downrod as­sembly to the ceiling. Fig. 7.

FIG. 6

(6)

HEX HEAD

LAG BOLTS

& WASHERS

FIG. 7

- 7 -

NOTE: For optimal performance, the hood
must be mounted no less than 23½” and no
more than 30½” above the cooktop.

3. Adjust height of downrod according
ceiling height and desired distance above
cooktop. See chart and Fig. 8

4. Install and tighten (3) set screws with hex

key provided in parts bag. Fig.9

t

C

o

B

A

CEILING

HEIGHT “A”

8 FOOT

9 FOOT

5. Secure safety cable as shown. Fig 10.

HEX NUT

CABLE CLAMP

DISTANCE

ABOVE

COOKTOP

“B”

23-1/2” 21-1/8”

24-1/2” 20-1/8”

25-1/2” 19-1/8”

28-1/2” 28-1/8”

29-1/2” 27-1/8”

30-1/2” 26-1/8”

BARREL

NUT

DOWNROD

LENGTH

“C”

36”

FIG. 8

C

FIG. 9

To secure safety cable:

A. Pull cable through cable clamp until slack

is removed from cable.
Pushing-in on barrel nut will release spring
and ease insertion of cable.

B. Trim off excess length of cable.

Note:

FIG. 10

- 8 -

INSTALL ELECTRICAL

WARNING : Electrical wiring must

be done by a qualified person(s) in ac­cordance with all applicable codes and
standards. This range hood must be prop­erly grounded. Turn off electrical power at
service entrance before wiring.

1. Run 2-wire-plus-ground 120 VAC power
cable to downrod mounting bracket.

2. Remove (2) screws from wiring box cover
and remove cover. Fig 11.

3. Remove 7/8” diameter knockout from
end of wiring box.

Run range hood wires from downrod

4.
through grommet and into wiring box.

5. Run 120 VAC power cable into opposite
side of wiring box. Secure cable to box
with an appropriate cable clamp.

6. Make wire connections using appropri­ately sized wire connectors. Connect
white-to-white, black-to-black and green-to
ground.

Push wiring inside wiring box.

7.
Replace wiring box cover and fasten

8.
with (2) screws. Make sure wires are not
pinched.

9. Slide decorative ceiling cover up until
holes align with (2) holes in downrod
mounting bracket. Fig. 12.

10. Replace & tighten (2) screws.

GROMMET

RANGE

HOOD
WIRES

(from

downrod)

120 VAC POWER CABLE

WIRING

BOX

GREEN TO GROUND

BLACK

TO

BLACK

WIRING BOX

COVER

WHITE

WHITE

TO

FIG. 11

- 9 -

FIG. 12

INSTALL RANGE HOOD
BODY

1. Thread (3) M5 x 15 mm screws into range

hood body, but do not tighten. Fig.13.

2. Leave a 5/16” gap between underside of

washers and mounting surface.

3. Lift range hood body into position under

downrod bracket.

4. Turn body until (3) M5 screws engage

with slots in mounting bracket. Tighten
screws. Fig.14.
CAUTION: To ensure that range hood body
is secure, make sure this screw is installed
and securely fastened!

5. Install and fasten (1) M5 x 15 mm screw

through the hole provided in one leg of the
mounting bracket and into the range hood
body.

6. Connect male and female electrical

connectors together.

7. Tuck excess wire under mounting

bracket.

8. Align wiring cover with holes on downrod

mounting bracket. Fig.15.

9. Fasten with (2) M5 x 15 mm screws.

10.Install filter assembly.

11.Turn on power at service entrance and

check operation of range hood.

M5 x 15 mm

SCREWS

(3)

FIG. 13

M5 x 15 mm

SCREW

(1)

- 10 -

FIG. 14

M5 x 15 mm

SCREWS

(2)

WIRING

COVER

FIG. 15

INSTALL FILTER

NOTE: Prior to use, remove protective plastic
film from both filter frames.

GREASE FILTER

To remove grease filter: (Fig. 16)
Pull down on latch tab to disengage filter from
hood. Tilt filter downward and remove.

To install grease filter:
Align rear filter tabs with slots in hood. Pull
latch tab down. Push filter into place and
release latch tab. Make sure filter is securely
engaged after installation.

CHARCOAL FILTER

The charcoal filter is located behind the
grease filter.

To remove charcoal filter: (Fig. 17)
Pull in center of each wire retainer and
disengage from holes in grease filter.

To install charcoal filter: (Fig. 18)
Place charcoal filter onto grease filter. Engage
wire retainers into holes in grease filter.

2

1

FIG. 16

FIG. 17

- 11 -

FIG. 18

WARRANTY

Broan-NuTone LLC (Broan-NuTone) warrants to the original consumer purchaser of Best products that such products
will be free from defects in materials or workmanship for a period of one year from the date of original purchase. THERE
ARE NO OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRAN­TIES OR MERCHANT ABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
During this one-year period, Broan-NuTone will, at its option, repair or replace, without charge, any product or part which
is found to be defective under normal use and service.
THIS WARRANTY DOES NOT EXTEND TO FLUORESCENT LAMP STARTERS, TUBES, HALOGEN AND INCANDES­CENT BULBS, FUSE, FILTERS, DUCTS, ROOF CAPS, WALL CAPS AND OTHER ACCESSORIES FOR DUCTING.
This warranty does not cover (a) normal maintenance and service or (b) any products or parts which have been subject
to misuse, negligence, accident, improper maintenance or repair (other than by Broan-NuTone), faulty installation or
installation contrary to recommended installation instructions.
The duration of any implied warranty is limited to the one-year period as specified for the express warranty. Some states
do not allow limitation on how long an implied warranty lasts, so the above limitation may not apply to you.
BROAN-NUTONE’S OBLIGATION TO REPAIR OR REPLACE, AT BROAN-NUTONE’S OPTION, SHALL BE THE
PURCHASER’S SOLE AND EXCLUSIVE REMEDY UNDER THIS WARRANTY. BROAN-NUTONE SHALL NOT BE LI­ABLE FOR INCIDENTAL, CONSEQUENTIAL OR SPECIAL DAMAGES ARISING OUT OF OR IN CONNECTION WITH
PRODUCT USE OR PERFORMANCE. Some states do not allow the exclusion or limitation of incidental or consequential
damages, so the above limitation or exclusion may not apply to you.
This warranty gives you specific legal rights, and you may also have other rights, which vary from state to state. This
warranty supersedes all prior warranties.
To qualify for warranty service, you must (a) notify Broan-NuTone at the address stated below or telephone number stated
below, (b) give the model number and part identification and (c) describe the nature of any defect in the product or part.
At the time of requesting warranty service, you must present evidence of the original purchase date.

In USA - Best®, 926 W. State Street, Hartford, WI 53027 (800-558-1711)
In Canada - Best®, 550 Lemire Blvd., Drummondville, QC J2C 7W9 (866-737-7770)
www.BestRangeHoods.com

ONE YEAR LIMITED WARRANTY FOR BEST PRODUCTS

- 12 -

SERVICE PARTS

KEY NO. PART NO. DESCRIPTION

1
1
9
14
26
37
38
45
48
49
53
67
115
116
117
117
118
119
147
165
166
167
199
202
208
329
332
415
415
998
999
ACF

AQI
AQI
CAS
IME

-

- B04302135

B03102790
B03102797
B08087696
B02300985
B02300882
B02300804
B03295595
BW0000019
B02310219
B03295076
B03204177
B02301006
B08093102
BE3351530
B03145784
B03145785
B08093038
B08093285
BR2300132
B03295008
B08080865
B03293185
B02300883
B03292063
B02300861
BE3351055
B08093286
B03202288
B03292596
B080810974
B080813595
B06102235

B06103984
B06103891
B06002013
B06145193

B08087829

FRAME (WHITE)
FRAME (BLACK)
GREASE FILTER
CAPACITOR
LAMP BULB
THERMOSTAT
ELECTRICAL PRINTED CIRCUIT BOARD BOX
BLOWER
MOTOR (CLOCK WISE)
FAN (CLOCK WISE)
RUBBER WASHER
WIRES
FEEDER CABLE CONNECTION BOX
FEEDER CABLE CONNECTION BOX COVER
CASING (WHITE)
CASING (BLACK)
BOTTOM DUCT EXTENSION
UPPER DUCT EXTENSION
JUNCTION CLAMP
ELECTRICAL BOX
ELECTRICAL PRINTED CIRCUIT BOARD
ELECTRICAL BOX COVER
CERAMIC INSULATOR BASE
REFLECTOR STOP
TRANSFORMER
BRACKET SUPPORT
COVER
FAIRLEAD
FAIRLEAD
FITTING SET
INSTALLATION INSTRUCTIONS SET
CONDENSER ASSEMBLY WITH WIRES
(includes key No.: 14)
SWITCH BOX ASSEMBLY (WHITE)
SWITCH BOX ASSEMBLY (BLACK)
BLOWER ASSEMBLY (includes key No.: 45, 48, 49, 53)
ELECTRICAL INSTALLATION ASSEMBLY (including key
No.: ACF, 38, 67, 147, 165, 166, 167, 208)
CHARCOAL FILTER

MOUNTING TEMPLATE

- 13 -

SERVICE PARTS

CAS

117

119

415

(03292596)

115

45

49

48

53

202

118

116

332

208

166

147

167

38

CHARCOAL FILTER

37

AQI

415

(03202288)

- 14 -

14

329

ACF

165

1

199

26

67

9

- 15 -