Diono Radian 3 R User manual

radian®3 R
car seat
Instruction Manual
from birth up to 120 lb / 54 kg
all-in-one convertible
silla de carro para infantes
manual de instrucciones
desde el nacimiento hasta las
120 lb / 54 kg
convertible todo en uno
READ INSTRUCTION MANUAL
before using this child restraint
LEA LAS INSTRUCCIONES
antes de usar este asiento de seguridad para niños

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REGISTER THIS CAR SEAT
Certification
Safe Use Guide
Safe Use Checklist
Warnings & Safe Practices
Car Seat Use After a Crash
Parts Listing
Vehicle Seating Locations
LATCH
Top Tether
First Setup
REAR-FACING INSTALLATION
Rear-Facing Checklist
LATCH installation
Lap/Shoulder Belt installation
Lap Belt Installation
FORWARD-FACING INSTALLATION
Forward-Facing Checklist
LATCH installation
Lap/Shoulder Belt installation
Lap Belt Installation
BOOSTER MODE INSTALLATION
Securing Your Child, Changing Harness Position
Belt Locking Clip and SafeStop
Lap Belt Cushion
Aircraft Installation
Harness Removal & Replacement
Expandable Side Wings
Care and Maintenance
WARRANTY
CONTENTS BEFORE YOU BEGIN
4
6
7–8
9–10
11–15
16
18–19
20–22
23
24–25
26–28
29–39
30–31
32–35
36–37
38–39
40–51
41–42
43–46
47–49
50–51
52–53
54–57
58–59
60
61
62–63
64–65
66–67
70–71
Para instrucciones en español, refiérase a la página 72
WE LOVE TO HELP
Hello there, Welcome to the Diono family!
We’ve created this lovingly engineered car seat
to help keep your child comfortable and safe
with all of the goods and none of the gimmicks.
We look forward to lending a helping hand each
and every day :)
Any questions? 1-855-463-4666

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REGISTER THIS CAR SEAT OUR STORY
Please take a moment to fill out the prepaid registration
card attached to the harness of the seat and mail it in today
or register online at: us.diono.com/register
Child restraints could be recalled for safety reasons. You must
register this restraint to be reached in a recall. Send your
name, address, e-mail address if available, and the restraint’s
model number and manufacturing date to:
Diono
PO Box 77129
Seattle, WA 98177
or call 1-855-463-4666 or
register online at: us.diono.com/register
For recall information, call the U.S. Government’s Vehicle
Safety Hotline at 1-888-327-4236 (TTY: 1-800-424-9153), or
go to http://www.NHTSA.gov.
For future reference, in the case of a change of address.
Please take a moment to fill out the following information:
This information can be found either on the registration card
or on the manufacturing label located on the seat.
Model Number :
Serial Number :
Manufactured in (date) :
Purchase date:
Time. It goes so fast... Who would have thought that nearly
two decades have passed since we first stepped out into the
world and started a business dedicated to family travel.
Well the world has changed a lot, but we’re proud to say
that we haven’t, (sure we’ve grown up), but we’re still as
passionate about what we do today as we were back then.
Our story is ‘made of Seattle’, a city like no other. This is a
place where creative minds & innovators rub shoulders within a
landscape of adventure; a place, where being ‘a little dierent’, is
the everyday norm.
With a love for design and an understanding of modern
parenting, we strive to create amazing products, so that you
and your little ones can celebrate the joy in every journey.
People who own Diono products can be found in all four
corners of the big blue green ball, we all call home. Some are
fans & followers, some are supporters, tweeters, social media
magicians, miracle moms and devoted dads.
Without your passion, pictures, words and stories, we would
never hear your voice. So tell us about your patch of grass,
and join in the hustle and bustle at www.diono.com.
share your journey @diono social or find the latest news.

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SAFE USE GUIDE
This child restraint system conforms to all
applicable Federal Motor Vehicle Safety
Standards (FMVSS 213).
CERTIFICATION
This child restraint is certified for use in aircraft
only when in harness mode.
This child restraint is not certified for use in
aircraft when used in booster mode. Aircraft
seats do not have shoulder belts which are
required for use with this booster.
Diono and the Federal Aviation Administration (FAA)
strongly urge you to secure your child in a child restraint
system (CRS) or device for the duration of your flight.
Please contact the airline for their specific policies.
YOUR CHILD’S SAFETY DEPENDS ON YOU. DEATH OR
SERIOUS INJURY CAN OCCUR.
No child restraint can guarantee protection from injury
in every situation, but proper use helps to reduce the
risk of serious injury or death.
Carefully read and understand all instructions and
warnings in this manual. Your child’s safety depends
on you knowing how to setup, install and use this child
restraint properly.
Choose the correct mode of use for your child,
depending on their weight.
This child restraint is designed for use only with children
who weigh 5–120 lb (2.3–54 kg) and whose height is
57 in. (145 cm) or less in the following modes.
WARNING – FAILURE TO FOLLOW THESE
INSTRUCTIONS AND THE PRODUCT LABELS
CAN RESULT IN SERIOUS INJURY OR DEATH
TO YOUR CHILD.

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SAFE USE GUIDE
DO NOT place this child restraint rear-facing in
a vehicle seating location with an active front air
bag.
Choose the proper child restraint belt path
1. REAR-FACING SECTION
2. FORWARD-FACING SECTION
3. BOOSTER MODE SECTION
• Rear-Facing: 5–50 lb (2.3–22.7 kg) and whose height
is 44 in. (112 cm) or less.
• Forward-Facing: 22–65 lb (10–29.5 kg) and whose
height is 57 in. (145 cm) or less.
• Booster: 40–120 lb (18–54 kg) and whose height is
57 in. (145 cm) or less.
• Infants who weigh less than 22 lb (10 kg) and are under
1 year old, MUST use this child restraint rear-facing.
For newborn infants, you must consult the infant’s
doctor before using this child restraint. A newborn
infant may have diculty breathing or have other
medical problems when placed in a seated position.
Before installing this child restraint in a vehicle, be
sure to also check the vehicle owner’s manual for
information on proper installation.
Check all installation configurations before discarding the
box. Diono cannot guarantee proper fit in all vehicles.
SAFE USE CHECKLIST
Booster Mode with Lap/Shoulder ONLY
40–120 lb (18–54 kg)
Forward-Facing with 5-Point Harness
22–40 lb (10–18 kg) WITH SafeStop Only
40–65 lb (18–29.5 kg) WITHOUT SafeStop
Rear-Facing with 5-Point Harness
5–22 lb (2.3–10 kg) MUST be Rear-Facing
22–50 lb (10–22.7 kg) CAN be Rear-Facing
RADIAN 3 RXT
US ENGLISH
5 lb
(2.3 kg)
22 lb
(10 kg)
40 lb
(18 kg)
50 lb
(22.7 kg)
65 lb
(29.5 kg)
120 lb
(54 kg)

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ALWAYS install this child restraint in the back seat.
The back seat is the safest place for children 12 and
under. See your vehicle owner’s manual for child
restraint installations and instructions.
NEVER leave child restraint unsecured in your vehicle
even when it is unoccupied. It could injure other
occupants in a sudden stop or crash.
Rear-Facing: Harness straps MUST be at or just below
the child’s shoulders. Top of head must be 1.5 in. below
the top of the car seat shell.
Forward-Facing: Harness straps MUST be just above
the child’s shoulders. Top of child’s ears MUST be
below top of car seat shell.
Booster Mode: Child MUST be secured using ONLY
the vehicle lap/shoulder belt. Child MUST weigh at least
40 lb (18 kg), with shoulders positioned at the 4th slot
and remain properly seated for the entire ride.
SAFE USE CHECKLIST
Choose a suitable location for this child restraint in
your vehicle. REVIEW VEHICLE SEATING LOCATIONS.
Install this child restraint tightly in your vehicle.
Grab the sides of the seat where the vehicle seat
belt or LATCH strap is and slide the child restraint
side-to-side and front-to-back. If the seat moves
less than 1 in. (2.5 cm), it is tight enough.
Secure harness snug and flat on your child.
US EN
NEVER PLACE THIS CHILD RESTRAINT
REAR-FACING IN A VEHICLE SEATING
LOCATION WITH AN ACTIVE FRONT
AIR BAG.
If an air bag inates, it can hit the child or child restraint
with enough force to cause serious injury or death to
your child.
For vehicles with side passenger air bags, refer to your
vehicle owner’s manual for information on your child
restraint installation.

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• DO NOT use any accessories, inserts or products
not included with this child restraint, unless
approved by Diono. Items not tested with this child
restraint could injure your child.
• DO NOT modify your child restraint.
• NEVER remove harness from child restraint without
following the proper removal and installation
instructions available from Diono.
• DO NOT use child restraint without seat cover installed.
• ALWAYS check to ensure buckle is securely latched.
• NEVER leave child unattended. Do not allow
children to play in or around the child restraint.
Child may become tangled in harness straps and
suocate or strangle.
• ALWAYS keep child properly secured in harness
whenever child is in child restraint.
• DO NOT use child restraint in any configuration not
shown in the instructions.
• NEVER install in rear-facing, side-facing or on the
back of a folded down vehicle seat.
• ALWAYS secure this child restraint with the
vehicle’s child restraint anchorage system (LATCH)
if available OR the vehicle seat belt.
• DO NOT use the LATCH system to attach this child
restraint rear-facing when restraining a child weighing
more than 35 lb (15.8 kg) or forward-facing when
restraining a child weighing more than 40 lb (18 kg).
• ALWAYS use the top tether strap on this child
restraint when installed forward-facing, if a tether
anchor is available.
• NEVER use child restraint in a vehicle seating
position where it cannot be secured tightly.
WARNING!
DEATH or SERIOUS INJURY can occur. WARNING! DEATH or SERIOUS INJURY can occur.

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• Take care to secure the child properly. Snugly adjust
the harness straps provided with this child restraint
around your child. A snug strap should not allow
any slack. It lies in a relatively straight line without
sagging. It does not press on the child’s skin or
push the child’s body into an unnatural position.
• Contact us by visiting the Diono website at
diono.com or call 1-855-463-4666.
EXPIRATION
• DO NOT use the child restraint if any part is
damaged or broken, expired (over 10 years from
date of purchase), missing instructions, missing
parts, or if the straps are cut, frayed, or damaged
in any way. Call 1-855-463-4666 to find out if the
damaged part or parts can be replaced.
SAFE PRACTICES
• DO NOT leave loose objects, such as books, bags,
etc., in the back of the vehicle. In the event of a
sharp turn, sudden stop, or crash, loose objects
can be thrown around and possibly cause serious
injury to vehicle occupants.
• ALWAYS check all surfaces of restraint before
securing your child. In warm weather, child
restraints can become very hot. Do not allow
children to play with vehicle seat belts.
WARNING!
DEATH or SERIOUS INJURY can occur. WARNING! DEATH or SERIOUS INJURY can occur.

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CAR SEAT USE AFTER A CRASH NOTES
The US National Highway Trac Safety Administration
(NHTSA) recommends that car seats be replaced
following a MODERATE or SEVERE crash in order to
ensure a continued high level of crash protection for
child passengers.
Car seats do not automatically need to be replaced
following a MINOR crash. NHTSA defines a MINOR
crash as ALL of the following:
• The vehicle was able to be driven away from the
crash site; AND
• The vehicle door nearest the car seat was not
damaged; AND
• No vehicle occupants were injured; AND
• There is no visible damage to the car seat; AND
• The airbags (if present) did not deploy.
NEVER use a car seat that has been involved in a
MODERATE or SEVERE crash.

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PARTS LISTING
1. LATCH Storage
2. Top Tether
3. SafeStop
4. Belt Locking Clip
5. Instruction Manual
Storage
6. Harness Straps
7. Harness Strap Hook
8. Forward-Facing Belt Path
9. Chest Clip
10. Harness Pads
11. Buckle
12. Buckle Pad
PARTS & FEATURES
RADIAN 3 RX
US
i
12
3
4
5
6
7
88
9
10
11
12
13
14
15 16
19
19
20
21
18 18
13. Harness Release
14. Harness Adjuster Strap
15. Expandable Side Wings
16. Rear-Facing Belt Path
17. Upper Booster Belt
Guides
18. Booster Belt Guide
Side Nubs
19. Detachable Rear-Facing
Base
20. Rear-Facing Top Tether
Connecting Strap
21. Lap Belt Cushion

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The safest seating position is one that works best for
your specific child restraint, family and vehicle model.
Before installing this child restraint you must determine
the method of installation and the best vehicle seating
position for that method. This child restraint can be
installed either using LATCH or the Vehicle Seat Belt.
DO NOT install using both methods at the same time.
When determining whether the child restraint can be
used with vehicle LATCH anchors in the rear center
seating position, it is critical that you refer to your
vehicle owner’s instruction book. If the child restraint
does not install best in the rear center seating location,
it is recommended to move to one of the outboard
seating positions.
VEHICLE SEATING LOCATIONS VEHICLE SEATING LOCATIONS
!
INSTALL CHILD RESTRAINT CORRECTLY
NEVER PLACE THIS CHILD RESTRAINT REAR-FACING
IN A VEHICLE SEATING LOCATION WITH AN ACTIVE
FRONTAL AIR BAG. If the airbag inflates, it can cause
serious injury or death to your child. For vehicles with
side air bags, refer to your vehicle owner’s manual for
information on your child restraint installation.
Vehicle
LATCH
Anchors

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The following types of vehicle belts
CANNOT BE USED with your child restraint.
If any of the belt types listed below
are in the chosen seating position, you
MUST choose another seating position
or use LATCH if available.
Please refer to your vehicle owners manual
for specific information about seat belts
and their use with child restraints.
1. Motorized (Automatic) Vehicle Belts
2. Dual Retractor Lap/Shoulder Belts
3. Non-Locking (ELR) Lap Belts
4. Inflatable Seat Belts *
5. Door Mounted Vehicle Belts
* Ford Inflatable seat belts are permitted
to be used for installation of this child
restraint in all configurations. No other
inflatable seat belts have been tested
with this child restraint.
VEHICLE SEATING LOCATIONS LATCH
WHAT IS LATCH?
Most vehicles manufactured after
September 1, 2002 are equipped
with LATCH (Lower Anchors and
Tethers for CHildren). Check your
vehicle owner’s instruction manual
to determine LATCH lower anchor compatible seating
positions. Some vehicles owner’s manuals use the term
“ISOFIX” instead; LATCH can also be used in vehicle
seating positions that are equipped with ISOFIX. Look
for the LATCH symbol that may be visible by the crease
of the rear seat.
WARNING: DO NOT USE the LATCH strap to attach
this child restraint rear-facing when restraining a child
weighing over 35 lb (15.8 kg) or forward-facing when
restraining a child weighing over 40 lb (18 kg).
DO NOT install using both LATCH connectors and the
vehicle seat belt at the same time.
1
2
3
4
5

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REAR-FACING TOP TETHER INSTALLATION
FORWARD-FACING TOP TETHER INSTALLATION
WHAT IS TOP TETHER?
A tether is designed to reduce
movement of a rear-facing and
forward-facing child restraint in a
crash.
Vehicle tether locations can be
found in many locations within the vehicle. Some
of the typical locations are shown here. Please refer
to your vehicle owner’s manual for exact locations,
requirements, and anchor identification points.
WARNING: Rear-facing top tether connector strap is
ONLY to be used in rear-facing installations.
1. Locate the track of vehicle seat that is bolted
directly to vehicle frame.
2. Wrap tether connecting strap around the track, and
thread metal “D” ring through the loop at the end of
the tether connecting strap. Pull strap to form a knot.
3. Now, use metal “D” ring as an anchorage point for
top tether metal hook.
TOP TETHER TOP TETHER
LEG OF SEAT TRACK
FLOOR
OF VEHICLE
BACK OF
SEAT
BACK
WALL
REAR SHELF

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UNFOLDING AND FOLDING
1. Place car seat on its back on a flat surface and
unfasten red carry strap from the bottom. Be sure
the harness adjuster moves freely and is not locked
within the bottom of the seat.
2. Rotate bottom until your hear
it “click”, this confirms the car
seat is locked for use.
3. Check proper operation — Pull
harness adjusting strap until
harness begins to tighten. If it
does not tighten freely, check the belt path on the
back of the seat bottom is clear from obstruction. To
fold seat, release the levers as shown and repeat
the above steps in reverse.
4. Tuck the red strap through the harness slot and
store behind the cover.
5. To fold, push lever shown and secure with red strap.
FIRST SETUP HARNESS SETUP
1. Place your child in the seat. Make sure their back
is flat against the car seat back (this can be done
in or out of the car). Avoid bulky or heavy clothing
because they will prevent the harness straps from
being tightened properly at first fitment.
2. Place harness straps over child’s shoulders and
legs and buckle. You will hear a “click” when
buckle tongues are securely attached. Pull up on
each buckle tongue to make sure it is securely
attached.
3. Be sure the harness straps are at the proper
height. Rear-Facing: Harness straps MUST be at or
just below the child’s shoulders. Top of head must
be 1.5 in. below the top of the car seat shell.
REAR-FACING
Rear-Facing
(harness AT or just below shoulders)
US & CA EN
CLICK!
folding/
release
lever

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REAR-FACING FORWARD-FACING BOOSTER MODE
INITIAL SETUP
1
REARFACING
installation instructions
Forward-Facing: Harness straps MUST be just above
the child’s shoulders. Top of child’s ears MUST be
below top of car seat shell.
Children 22–30 lb
(10–13.6 kg)
MUST use the middle
buckle slot ONLY!
Children above 30 lb
(13.6 kg) MUST use the
forward most buckle
slot ONLY!
MIDDLE SLOT
FORWARD MOST SLOT
Forward-Facing
(Harness just above shoulders)
FORWARD-FACING

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REAR–FACING REAR–FACING
REAR-FACING INSTALLATIONS:
5–50 lb (2.3–22.7 kg)
Infants who weigh less than 22 lb (10 kg) and are under
1 year old, MUST use this car seat rear-facing.
Place car seat rear-facing in the vehicle back seat.
Make sure LATCH strap or vehicle seat belt is routed
through the rear-facing belt path marked with the
blue text and rear-facing illustrations.
Install this car seat tightly in your vehicle. The car
seat should not move at the rear-facing belt path
location by more than 1 in. (2.5 cm) from side-to-
side, front-to-back. If using a lap belt only, refer to
your vehicles owners manual for installation advice.
Harness straps MUST be at or just below the top of your
child’s shoulders. Place the chest clip at armpit level.
The American Academy of Pediatrics (AAP) and NHTSA
recommend that children be rear-facing until they reach
the maximum rear-facing height and weight. This
car seat can remain rear-facing up to 50 lb (22.7 kg).
Rear-facing top tether is available. For rear-facing top
tether installation instructions, refer to pages 24–25.
REAR-FACING BELT PATH
LATCH Strap
Vehicle Lap/Shoulder Belt
Vehicle Lap Belt

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REAR–FACING REAR–FACING
INSTALL USING LATCH: 5–35 lb (2.3–15.8 kg)
DO NOT install by this method for a child weighing
more than 35 lb (15.8 kg). Reinstall with vehicle belt
for weights between 35–50 lb (15.8–22.7 kg).
1. Install detachable rear-facing base. Align posts
as shown in GREY by aligning the color coded
dots. Slide the base into place to align the dots
blue-to-blue, yellow-to-yellow. Once aligned,
press the lever shown into the seat base to engage.
Confirm base is locked and does not move.
2. Remove LATCH strap from
storage location 1 on back of
seat. Use LATCH release on
LATCH connectors and pull
up to remove.
3. Extend the LATCH strap. For
easier installation, extend the
LATCH strap to its maximum
length by pressing the grey
button and pulling on the strap.
4. Place LATCH strap for access
to rear-facing belt path.
From back of seat, unfasten
the right side of the cover
from seat shell. Feed LATCH
connectors down, keeping
under the cover and out the
bottom. Once completed,
refasten the cover to seat
shell.
3
1
2
4

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REAR–FACING REAR–FACING
5. Place car seat rear-facing
in back seat of the vehicle.
Center the car seat between
the vehicle LATCH anchors.
The entire seat bottom should
sit flat on the vehicle seat.
6. Slide the LATCH strap through
the rear-facing belt path and
out the other side.
The LATCH strap should lie flat
and not be twisted.
7. Attach LATCH connectors
to vehicle LATCH anchors
and listen for audible click to
confirm engagement.
8. Tighten the LATCH strap.
Press down firmly in the center
of the car seat while tightening
the LATCH strap. You may
need to tighten further by
pulling upwards in-line with
the belt path as shown.
9. Test for tightness.
Grab the side of the seat with
one hand where the LATCH
strap is and slide the car
seat side-to-side and front-
to-back. If the seat moves
less than 1 in. (2.5 cm), it is
tight enough. Do not test by
grasping the top or back of the
seat.
10. To remove LATCH strap from
vehicle — Use LATCH release
on the LATCH connectors and
pull them o the anchor bars.
5
6
7
10
8
9

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REAR–FACING REAR–FACING
INSTALL USING LAP/SHOULDER BELT WITH
5-POINT HARNESS : 5–50 lb (2.3–22.7 kg)
1. Place car seat rear-facing in
back seat of the vehicle with
detachable rear-facing base
installed (page 32).
The entire seat bottom should
sit flat on the vehicle seat.
2. Slide the vehicle seat belt
through the rear-facing belt
path and out the other side.
Buckle it. The seat belt should
lie flat and not be twisted.
3. IMPORTANT! Tighten the
vehicle seat belt.
Press down firmly in the
center of the car seat. To
tighten, pull on the loose end
of the vehicle lap/shoulder
belt.
4. Test for tightness.
Grab the side of the seat
where the vehicle seat belt is
and slide the car seat side-
to-side and front-to-back. If
the seat moves less than 1 in.
(2.5 cm), it is tight enough. Do
not test by grasping the top or
back of the seat.
1
2
3
4

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REAR–FACING REAR–FACING
INSTALL USING 5-POINT HARNESS WITH:
LAP BELT: 5–50 lb (2.3–22.7 kg)
1. Place car seat rear-facing in
back seat of the vehicle with
detachable rear-facing base
installed (page 32). The entire
seat bottom should sit flat on
the vehicle seat.
2. Slide the vehicle seat belt
through the rear-facing belt
path and out the other side.
Buckle it. The seat belt should
lie flat and not be twisted.
3. Tighten the vehicle seat belt.
Press down firmly in the center
of the car seat. To tighten, pull
on the loose end of the vehicle
lap belt to tighten it.
4. Test for tightness.
Grab the side of the seat where
the vehicle seat belt is and
slide the car seat side-to-side
and front-to-back. If the seat
moves less than 1 in. (2.5 cm),
it is tight enough. Do not test
by grasping the top or back of
the seat.
1
2
3
4