LG LMV1751ST Installation Manual
Website: http://www.lg.com
MICROWAVE OVEN
INSTALLATION INSTRUCTIONS
PLEASE READ AND SAVE THESE INSTALLATION INSTRUCTIONS.
MFL37192908_02
Your Safety First
BEFORE YOU START
• Proper installation is the installer's responsibility!
Proper installation by a qualified technician or installer is recommended.
– Read the entire manual before you begin. The model number label is located on the oven front.
See Figure 1. The mounting plate is located on the upper packing. See Figure 2.
NOTE: Vent grille appearance varies by model.
BE SURE TO READ THE FOLLOWING SAFETY INSTRUCTIONS:
Model Number Plate
Model Number Plate
or
Mounting Plate Mounting Plate
Figure 1
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Figure 2
For Your Safety
• This oven should not be installed or located by anyone except properly qualified service personnel.
• You will need TWO people to install this oven. It is heavy and could cause personal injury if not handled
properly.
• Avoid Electric Shock!
– Before you drill into the wall, note where electrical outlets are and where electrical wires might be concealed
behind the wall. YOU COULD GET AN ELECTRIC SHOCK if you contact electrical wires with your drill bit.
– Locate and disconnect the power to any electrical circuits that could be affected by installing this oven.
IF YOU DO NOT DISCONNECT THE POWER, YOU COULD GET AN ELECTRIC SHOCK.
• ELECTRICAL RATING OF THIS OVEN : 120V AC 60Hz.
– You need a DEDICATED 120V, 60Hz, AC only, 15 or 20A, fused electrical supply (located in the cabinet
above the microwave as close as possible to the microwave) serving only the microwave.
• THIS APPLIANCE MUST BE GROUNDED!
If there is an electrical short circuit, grounding reduces the risk of electric
–
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.
• Place the plug into a properly installed and grounded outlet. See Figure 3.
• Do not use an extension cord.
• Keep the power cord dry and do not pinch or crush it.
Failure to follow this instruction may cause a fire hazard.
• DO NOT, UNDER ANY CIRCUMSTANCES, REMOVE THE
POWER SUPPLY CORD GROUNDING PRONG!
This appliance MUST be grounded!
PROPERLY POLARIZED AND
GROUNDED OUTLET
Three-Pronged (Grounding) Plug
Figure 3
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If you use the grounding plug improperly, you risk electric shock and/or fire!
Check with a qualified electrician if you are not sure whether the oven is properly grounded or if you do not
completely understand the grounding instructions.
DO NOT USE A FUSE IN THE NEUTRAL OR GROUNDING CIRCUIT.
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Improper grounding could result in electric shock, fire or other personal injury.
– 2 –
Your Safety First
SAVE THESE INSTRUCTIONS FOR THE LOCAL ELECTRICAL INSPECTOR'S USE.
• DO NOT EXPOSE YOURSELF TO EXCESSIVE MICROWAVE ENERGY!
– DO NOT try to operate the microwave oven with the door open.
– DO NOT tamper with or defeat the safety interlocks.
– DO NOT place objects between the microwave oven front face and the door.
– DO NOT allow soil or cleaner residue to build up on the flat surfaces around
– DO NOT operate the microwave oven if it is damaged.
– The microwave oven door must close properly to operate safely.
– DO NOT USE THE MICROWAVE OVEN:
• If the door is bent.
• If the hinges or latches are broken or loose.
• If the door seals, sealing surfaces or glass is broken.
– DO NOT ATTEMPT TO ADJUST OR REPAIR THE OVEN YOURSELF!
It should be adjusted and repaired by a qualified technician who can check for microwave leakage after
repairing the oven.
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If you do not use the microwave oven as instructed,
you could be exposed to excessive microwave energy.
• MAKE SURE YOU HAVE ENOUGH SPACE AND SUPPORT.
– Mount the oven against a flat, vertical wall, so it is supported by the wall. The wall should be constructed of
minimum 2" x 4" wood studding and 3/8" thick drywall or plaster/lath.
– ATTACH (See note on page 4) the two lag screws supporting the oven to a vertical, 2" x 4" wall stud.
– DO NOT mount the microwave oven to an island or peninsula cabinet.
– BE SURE the upper cabinet and rear wall structures can support 150 lbs., plus the weight of any
items you place inside the oven or upper cabinet.
– Locate the oven away from strong draft areas, such as windows, doors, and strong heating vents.
– BE SURE you have enough space. See Figure 4 below for minimum vertical and horizontal clearance.
the microwave oven door.
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If you do not mount the oven as instructed,
you risk personal injury and/or property damage.
NOTE: Maximum cabinet depth is 13".
Grounded Outlet
(inside upper cabinet)
Power Supply Cord Hole
30" min. cabinet opening width
30" min. clearance from bottom
of cabinet to cooking surface
or countertop before installation.
(Use templates included
with installation instructions)
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• Before you begin installing the oven, PLACE A PIECE OF THE CARTON OR OTHER HEAVY
MATERIAL (a blanket) over the countertop or cooktop to protect it. Do not use a plastic cover.
Failure to protect these surfaces could result in property damage.
Figure 4
– 3 –
Parts, Tools, Materials
THE FOLLOWING PARTS ARE SUPPLIED WITH THE OVEN:
NOTE: Depending on your ventilation requirements, you may not use all of these parts.
Damper/duct connector
(for roof venting or wall venting installation)
Not Actual Size (2 pieces must be assembled as
shown) Not used if venting into kitchen.
One power cord clamp and
One dark-colored mounting screw
(to hold the power cord)
Actual Size
One power cord clamp bushing - Actual Size (for the cord hole in a metal upper cabinet)
One mounting plate - Not Actual Size (for supporting the Microwave Oven )
WARNING - TO REDUCE THE RISK OF FIRE AND ELECTRIC SHOCK,
INSTALL AT LEAST 13-3/4 INCHES ABOVE A COOKTOP(OR RANGE)
Two
1/4" x 2" lag screws - Actual Size
(for wall stud holes)
SUITABLE FOR USE ABOVE GAS OR ELECTRIC
COOKING EQUIPMENT 36 INCHES OR LESS WIDE.
APTO PARA SU USO SOBRE EQUIPOS ELÉCTRICOS O
A GAS CON ANCHO DE 36 PULGADAS (90CM) O INFERIOR
ADVERTENCIA - PARA REDUCIR EL RIESGO DE INCENDIO Y DE DESCARGA ELÉCTRICA,
INSTALE AL MENOS A 13-3/4 PULGADAS (35CM) SOBRE LA VITROCERÁMICA (O FOGÓN)
Two 1/4" x 3" toggle bolts - Actual Size
(for drywall holes)
Two tapping screws - Actual Size
(for attaching the damper duct connector)
Two 1/4" x 3" bolts - Actual Size
(for securing to the upper cabinet
)
One upper cabinet template- Not Actual Size
Two 1/4" x 3" bolts - Actual Size
(for securing to the upper cabinet)
One rear wall template- Not Actual Size
(1 piece mounting plate only)
NOTE: You need to install at least one lag screws into a 2" x 4" stud and three anchor bolts into the wall.
and the mounting area must meet the 150 lbs. weight requirement.
– 4 –
Parts, Tools, Materials
You will need the following tools and materials for the installation:
Carton or other heavy material such as a blanket for covering the counter top.
Clear Tape
(for taping the templates to the wall)
Saber Saw
(for cutting vent holes for roof
or wall venting)
Phillips Screwdriver
(for the screws)
Pencil
Gloves
Stud Finder or Thin Nail
Keyhole Saw (for the power cord hole)
Electric Drill
3/8" and 3/4" wood drill bits
1/2" and 3/16"
drill bits
Flat Blade Screwdriver
(for the toggle bolts)
Measuring Tape
(metal preferred)
Small Side Cutters(Nipper) or Tin Snips
If you have brick or masonry walls, you will need special hardware and tools.
The ductwork you need for the installation is not included. All wall and roof caps must have a back-draft damper.
(Shown on page 4).
Wear proper gloves to protect your hands from injury.
– 5 –
Plumb Line
Duct Tape
Caulking Gun and Caulk
STEP 1: Prepare The Electrical Connection
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AVOID ELECTRIC SHOCK! THIS APPLIANCE MUST BE GROUNDED!
1. Locate the grounded electric outlet for this oven in the
cabinet above the oven, as shown in Figure 5.
NOTE: The outlet should be on a circuit dedicated to the
microwave oven (120V, 60 Hz., AC only) with a 15 or 20A
fused electrical supply.
Upper
Cabinet
IMPORTANT: If you do not have the proper wall outlet,
you MUST have one installed by a qualified electrician.
2. You will cut the hole for the power supply cord (shown in
Figure 5) later when you prepare the wall and upper cabinet in
Step 4.
NOTE: Do not use an extension cord.
Keep the power cord dry and do not pinch or crush it.
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Improper grounding could result in electric shock or other personal injury.
DO NOT, UNDER ANY CIRCUMSTANCES, REMOVE THE POWER SUPPLY CORD
GROUNDING PRONG!
This appliance MUST be grounded!
Power-Supply-Cord Hole
Figure 5
Grounded Outlet
(Inside Cabinet)
– 6 –
STEP 2: Prepare The Venting System
NOTE: The ductwork you need for outside ventilation is not included with your oven. The standard ductwork
fittings and length are shown in Figure 10, page 8.
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THIS OVEN MUST BE PROPERLY VENTED!
You may vent your oven in one of three ways. However, do NOT vent into a wall cavity, an attic, or an unused
area.
Roof-venting If your oven is located on an outside wall near the roof, as in Figure 7 (3 1/4" x 10" duct) and
Figure 9 (6" round duct.)
Wall-venting If your oven is located on an outside wall of your house, as in Figure 6 (3 1/4" x 10" duct) and
Figure 9 (6" round duct.)
Room-venting If your oven is located on an inside wall of your house, as in Figure 8.
NOTE: If you choose the rear exhaust method (roof or wall-venting), be sure there is enough clearance within the
wall for the exhaust duct.
Wall Venting
Cabinet
Wall Cap
Oven
Wall Mounting
3 1/4"x10"
Duct
Through-the-wall Duct
Figure 6
REMEMBER AS YOU INSTALL THE
VENTING:
Keep the length of the ductwork and the number
of elbows to a minimum to ventilate your oven
efficiently. See examples on page 8.
Keep the size of the ductwork the same.
Do not install two elbows together.
Use duct tape to seal all joints in the duct system.
Use caulking to seal the exterior wall or roof
opening around the cap.
Cabinet
Room Venting
Cabinet
Oven
Figure 8
Oven
Roof Venting
Roof Venting
Roof Cap
3 1/4"x10"
Duct
Through-the-roof
Figure 7
Roof Cap
6"min diameter
Round Duct
3 1/4" to Round
Duct Transition
Elbow
3 1/4" to Round
Ductwork Transition
Figure 9
Wall Cap
After installation, you should check outside hood opening and operation.
When you install the oven, please refer to the Installation Manual.
For the outside hood opening position and size refer to the upper cabinet template or rear wall template.
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STEP 2: Prepare The Venting System
Standard Fittings
NOTE: If the existing duct is round, you must use a rectangular-to-round adapter, with a rectangular 3" extension
duct installed between the damper assembly and the adapter to prevent the exhaust damper’s sticking.
Duct Length
The total length of the duct system, including straight duct, elbows, transitions, and wall or roof caps must not
exceed 140 feet.
For best performance, do not use more than three 90 degree elbows, and keep the length as short as possible.
Below are the standard fittings and their equivalent length in feet.
1 2 3
3 1/4” x 10”
to 6" = 5 ft.
4 5 6 7
90˚elbow
= 10 ft
3 1/4” x 10”
wall cap
= 40 ft
3 1/4” x 10” roof
cap = 24 ft
45˚elbow
= 5 ft
3 1/4” x 10” 90˚
elbow = 25 ft
3 1/4” x 10”
flat elbow
= 10 ft
Figure 10
To calculate the equivalent length of each duct piece used, see the examples below.
For 3 1/4" x 10" SYSTEMS
6ft.
2ft.
wall cap
Examples
For 6" ROUND SYSTEMS
transition
2ft.
6ft.
wall cap
1 3 1/4” x 10” 90° elbow = 25 ft.
1 Wall Cap = 40 ft.
8 feet straight duct = 8 ft.
TOTAL LENGTH = 73 ft.
1 transition = 5 ft.
2 90° elbows = 20 ft.
1 Wall Cap = 40 ft.
8 feet straight = 8 ft.
TOTAL LENGTH = 73 ft.
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STEP 3: Prepare The Venting Blower
Your microwave oven is shipped with the blower assembled fo room-vented. You need to adjust the blower if your
want wall-venting or roof-vented installation.
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ELECTRIC SHOCK HAZARD! UNPLUG UNIT BEFORE WORKING ON IT.
• DO NOT PULL OR STRETCH THE BLOWER WIRING! Pulling and stretching the blower wiring could result in
electric shock.
1. Remove any shipping materials and parts from inside the
microwave oven. Set them aside for later use.
2. Cover the counter top or cooktop with a thick, protective
covering to protect it from damage and dirt. See Figure 11.
NOTE: If you have a free-standing range, disconnect
it, move it onto a piece of cardboard or hardboard and
pull it away from the wall, so that you can get closer to
the upper cabinet and back wall for easier measuring
and drilling.
3. Locate the exhaust adaptor, grease filters and hardware packet.
4. At this point, remove any adhesive tape (if there is any), on the
exhaust adaptor, the grease filters and the power supply cord.
• Do not remove the packing tape on the slide-out vent.
NOTE: Set the product down on a flat surface only.
ROOM-VENTED INSTALLATION:
This oven is shipped assembled for room-vented.
You need togo to STEP 4: PREPARE THE WALL & UPPER CABINET
located on page 13 .
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Control Panel Side
Mounting plate
A thick, protective
covering
Figure 11
Mounting plate
screws
FIRE HAZARD! CORRECTLY INSTALL THE VENT FAN BEFORE USE .
When changing the vent fan position for a rear wall vent or roof vent:
•
1. Properly align the ventilation fan openings and blower plate knockouts.
2. Ventilation fan openings should be completely exposed to the outside.
3. After installation, check the air ventilation path. Refer to page 7 Figures 6-8 for proper vent selection.
Improper installation can cause problems such as:
•
1. Inability to assemble blower plate or ventilation motor correctly.
2. Abnormal noise during product operation.
3. Weak ventilation.
4. Product overheating - possibility of product breakdown or fire.
– 9 –
STEP 3: Prepare The Venting Blower
WALL-VENTING INSTALLATION:
1. Remove one cover plate mounting screw and cover plate
Remove one or several blower plate mounting screw(s) and
the blower plate.
Remove the cover plate and one or two blower unit mounting
screw(s). See Figure12
2. Carefully lift the blower unit out of the microwave oven.
See Figure 13.
3. Use side cutters or tin snips to cut and remove knockouts
B from Back plate. Discard knockouts. Be careful not to
distort the plate. See Figure 14.
4. Reassemble the blower wire. See Figure 15.
5. Rotate and reinstall the blower unit so that the exhaust
ports face the rear of the cabinet and are aligned with the
rear cut-outs. See Figures 16 & 17.
6. Reattach the blower plate to cabinet so the exhaust ports
and blower plate opening are aligned. Attach with one
blower unit mounting screw and then one or several blower
plate mounting screw(s). Reattach the cover plate with screw
on the blower plate, See Figure 18.
7. Insert the tabs on each side of the damper into the holes
at the inside rear of the adaptor.
Attach the exhaust adaptor to the back plate wall side.
Push in securely until it is past the top locking tabs
and in the lower locking tabs. Take care to assure
the damper hinge is installed so that it is at the top
and that the damper swings freely. See Figure 19.
Blower Unit
Parts B
Cover plate
Blower Plate
Mounting Screw
Blower Plate
Back Plate
Blower Unit
Mounting Screw
Cover plate
Figure 1
or
Figure 13
Knockouts Parts B
Blower Unit
Blower Unit
Exhaust Ports
Figure 15
Blower Plate
Mounting Screw
Figure 18
Cover plate
Blower Plate
Back Plate
Blower Unit
Mounting Screw
Figure 16
– 10 –
Parts B
Blower
Unit
Exhaust Ports
Exhaust Adaptor
Slide exhaust
adaptor into
guides on
rear panel.
Figure 14
Exhaust
Ports
Figure 17
Damper
(hinge side up)
Locking
Tabs
Guides
Figure 19
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