®
convertible + booster
Instruction Manual
US Version
Please read carefully
Store manual behind cover
Table of Contents
Before You Start
First Steps Summary....................................................................................... 4-6
Registration......................................................................4
Get to Know Your Car Seat.................................... 4-6
Seat Position................................................................. 15
Harness Position.................................................... 21-22
Rear-facing Installation.......................................30-37
Forward-facing Installation............................. 38-47
Booster Installation............................................. 48-49
Unfolding and Folding the Car Seat..........................................................7-9
LATCH vs. Seat Belt Installation..............................................................10-11
Safety
Get to Know the Parts and Features of your diono radian rXT......... 12
®
Warnings........................................................................................................ 14-15
Child Car Seat Safety Information........................................................ 16-17
Seat Belt Information....................................................................................... 18
Locking a Vehicle Lap-Shoulder Belt with a Locking Clip.................. 19
Car Seat Stability Checklist............................................................................. 20
Properly Securing Your Child
Position of the Harness (Rear-facing or Forward-facing)............ 21-22
Side Impact Head Support Adjustment.................................................... 23
Infant Support Cushion Use.......................................................................... 24
Securing the Harness Straps, Harness Buckle, and Harness Pads....... 25-29
Expandable Sides............................................................................................... 29
Rear-Facing Installation
Installing and Removing Detachable Base.............................................. 30
Rear-facing SuperLATCH™ Installation............................................... 31-32
Rear-facing Lap-Shoulder Belt Installation...................................... 33-34
Rear-facing Lap Belt Installation.......................................................... 35-36
Rear-facing Top Tether Installation............................................................. 37
2
Forward-Facing Installation
Safe Stop® Instructions.................................................................................... 38
Forward-facing Adjustable Bottom............................................................ 39
Forward-facing SuperLATCH™ Installation...................................... 40-42
Forward-facing Lap-Shoulder Belt Installation.............................. 43-44
Forward-facing Lap Belt Installation.................................................. 45-46
Forward-facing Top Tether Installation..................................................... 47
Booster Mode Installation
Booster Mode Installation...................................................................... 48-49
Final Checklist
Final Checklist for All Installations..............................................................50
Additional Information
Carrying the Car Seat....................................................................................... 51
Cup Holder........................................................................................................... 52
Car Seat Cover (Removing and Replacing).............................................. 53
Cleaning and Maintenance..................................................................... 54-56
Replacing Harness Straps............................................................................... 57
Aircraft Installation............................................................................................ 58
Warranty Information....................................................................................... 59
3
Before You Start
WARNING:
Failure to follow the warnings on the labels and in the
instruction manual can result in serious injury or
death to your child.
First Steps Summary
Registration
Register your car seat.
• Mail in your registration card or go online to
us.diono.com and register your car seat.
REGISTER your car seat online at us.diono.com or
PLEASE COMPLETE AND MAIL THE OWNER
REGISTRATION CARD THAT CAME WITH YOUR SEAT
WITHIN THIRTY (30) DAYS OF PURCHASE. Any claim or
legal action available to the purchaser under this
Limited Warranty must be filed or brought within one
year from the date of original retail purchase, and
purchaser agrees that in the event of any dispute, all
disputes shall be brought, if at all, in a court located in
Pierce County, Washington to the exclusion of any other
court. The prevailing party shall receive all costs and
reasonable attorneys’ fees, including for any appeal.
Get to Know Your Car Seat
Read all safety warnings on pages 14-15.
4
Upon removing your car seat from the box,
unfold your seat.
(See pages 7-9)
• Check to be sure the area is clear of debris.
• Remove body support and infant head support
cushions.
• Check that your seat is in the unfolded and locked
position.
Get to know the parts, pieces, and accessories
of your car seat.
(See pages 12-13)
Seat Position
Determine the seating position of your child.
(See pages 10-11)
• Will your child be rear-facing or forward-facing?
Determine how you will be installing your seat.
(See pages 10-11)
• LATCH or seat belt installation
• Top Tether
• Booster Mode without harness
• Safe Stop® (Please Note: Do not discard Safe Stop®
as you may need this piece later during your child’s
development)
Harness Position
Be familiar with the steps to properly secure
your child in your car seat.
(See pages 21-29)
• Proper harness height and maximum child weights.
• Harness buckle location and installation.
• Side impact and head support
• Infant support cushions
5
Before You Start
Get to Know Your Car Seat (cont.)
Before You Start
First Steps Summary (cont.)
Installation
Properly secure your car seat in your car.
(See pages 30-37 for rear-facing installation and pages 38-47 for
forward-facing installation)
• Double check your work.
• Did you do a car seat stability check?
Place your child in your installed car seat.
(See pages 21-27)
• Are your harness straps snug?
• Is your child’s harness in the correct position?
• Is your head support at the correct height?
• Double check your work.
Important: It is important to check your car seat in ALL
installation methods right away. Do not wait. Doing so ensures
your seat works when installed with a seat belt, SuperLATCH™
and in booster mode.
6
WARNING:
• Do NOT carry the car seat by harness adjuster strap. This can
damage the mechanism and the webbing.
• Do NOT use the car seat if release levers or locking bolts bind or
do not move freely. When release levers are lifted, release levers
and locking bolts should spring back immediately.
• Do NOT oil or lubricate any part of car seat.
• Always confirm car seat is locked securely in its unfolded position
before each use.
• To avoid risk of injury, keep others at a safe distance during
folding and unfolding.
• Familiarize yourself with car seat unfolding and folding operations
prior to use.
• Foreign objects and debris can interfere with proper operation of
locking mechanism. Before installation, confirm both locking bolt
and release lever areas are free of any debris (See pages 54-57 for
cleaning of mechanisms).
Unfolding the Car Seat
Important: Before unfolding seat, remove body support
cushion, if it is present.
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.
Firmly rotate the bottom
until a ‘click’ confirms the
car seat is locked in the
open position.
CLICK
Folding
release
lever
7
Before You Start
Unfolding and Folding the Car Seat
Before You Start
Unfolding and Folding the Car Seat (cont.)
Pull harness adjusting strap
until harness begins to
tighten. If strap does not
slide freely, fold car seat,
remove harness adjusting
strap from fold joint and
repeat Step 3.
Fasten both fabric side
panels to center panel.
To Store: Tuck the red strap
behind cover through the
slit in the cover between
the top two harness slots.
Important: Confirm release levers are completely recessed
inside their housings. Confirm the car seat is locked in the open
position. If not, repeat Step 2.
Folding the Car Seat
Unbuckle harness and
remove the infant cushions
(if used) and take out the
red carry strap from behind
the cover. Unfasten both
fabric side panels and open
fully.
Loosen harness straps,
pads, and chest clip: lift
silver lever (Camlock)
while pulling the harness
straps all the way forward
towards the top center of
the car seat.
8
Before You Start
)
Raise head support to its
top position. (See Page 23)
Adjust both expandable
sides to their inward
position.
Place car seat on its back,
push either release lever
downward to release
locking bolts.
Keep harness buckle
lifted toward the top of
the car seat while folding
seat bottom up to avoid
pinching the buckle within
the fold.
Fasten red carry strap on
the first metal bar to secure
the bottom of the car seat
in its folded position.
Important: If car seat does not easily fold completely, do NOT
force it closed. Repeat steps 1-8 as needed.
WARNING:
• Car seat can accidentally unfold and cause injury if not properly
secured by carry strap.
9
Before You Start
LATCH vs. Seat Belt Installation
WARNING:
• This car seat should NEVER be installed using both the lower
anchors and the seat belt at the same time. It is not tested this
way. Therefore, we cannot determine if this is a safe way to install
the car seat.
Either installation meets all Federal Motor Vehicle Safety Standards.
In some vehicles one or the other might give you a correct installation.
Rear-Facing Capacity
Child’s Weight: 5-45 lbs.
Child’s Height:
Less than 1.5” from top
of head to top of seat
• SuperLATCH™ only
up to 35 lbs.
• SuperLATCH™ & top tether
up to 35 lbs.
• Seat belt only
up to 45 lbs.
• Seat belt & top tether
up to 45 lbs.
• Lap-shoulder belt over child
• Lap-shoulder belt over child
with SuperLATCH™ & top tether
Got a Question?
Please visit our website us.diono.com for tips and videos on
installations, adjusting the harness and other frequently asked
questions.
Or, you can call our Customer Care Department. We have highly
trained Customer Care Representatives who are also Certified
Child Passenger Safety Technicians (CPST).
Call us Toll-Free at 1-855-463-4666. We are open from 8 a.m. –
5 p.m. Pacific Standard Time, Monday through Friday.
In addition, a certified Child Passenger Safety Technician might
be located near you. To find one you can go to, www.safercar.gov.
These individuals are usually volunteers, dedicated to educating
parents on installations and are willing to help. Please note: These
technicians are NOT employed by Diono, LLC.
10
F
y
LATCH stands for Lower Anchors and Tethers for Children.
SuperLATCH™ is the same as LATCH, but only attaches to the lower
anchors of your vehicle’s seats.
Here are your choices for installation: Diono always recommends
using the Top Tether strap if an appropriate anchor is available.
Forward-Facing Capacity
Booster Mode
Child’s Weight: 20-80 lbs.
Child’s Height:
Up to 57” tall or top
of ears are above top
Child’s Weight: 50-120 lbs
Child’s Height:
Up to 57” or top
of ears are above top
up to 40 lbs.
up to 40 lbs.
up to 80 lbs.
up to 80 lbs.
up to 120 lbs.
up to 120 lbs.
Expiration Date
All car seats have
expiration dates.
This radian rXT car seat
expires 10 years after the date
of purchase (DOP). If the date of
purchase can't be determined,
refer to the date of manufacture
(DOM). The label with this
information is located on the
child's left hand side of the car seat.
®
WRITE YOUR SEAT INFORMATION
HERE:
MODEL #:
DOP:
/
DOM:
/
SERIAL #:
11
Before You Start
In many cases, either one will give you a correct installation.
Get to Know the Parts and Features
of your diono radian rXT
®
5
1
8
6
7
2
9
6
3
4
4
6
6
1 SuperLATCH™ storage
2SuperLATCH™
attachment strap guide
3Forward-facing belt path
4 Folding release levers
5 Safe Stop®
6 Carry strap loops
7 Locking clip
8 Top tether strap
9 Harness straps
10 Chest clip
11 Harness buckle
12 Expandable sides
13 Harness adjuster strap
14 Rear-facing belt path
15Booster mode shoulder
belt guide
16 Buckle pad
17Detachable rear-facing
base
18Rear-facing top tether
connector strap
19 Cup holder
2065 lb+ enhanced
harness pad
21 Infant head pillow
22 Body support
12
15
9
10
11
16
12
13
14
17
18
19
21
20
22
13
Safety
WARNING
DEATH OR SERIOUS INJURY CAN OCCUR
• Follow all instructions labeled on this child car seat and in the
written instruction manual on the lanyard located on back of
car seat. For newborns or children without head control, consult
pediatrician for recommended seat back angle before
installation.
• Failure to follow all instructions and product labels can result in
death or serious injury in a crash. Carefully read and understand this
instruction manual prior to using car seat. If you have any questions,
visit us.diono.com or contact Diono at 1-855-463-4666.
• Use only with children weighing between 5 lbs to 120 lbs
(2.3 to 54 kg).
• With any infant weighing less than 20 lbs (9.1 kg), use only
rear-facing.
• Child weight limits:
Rear-facing:
5-45 lbs (2.3-20.5 kg)
Forward-facing with 5-point harness: 20-80 lbs (9-36 kg)
Booster mode:
50-120 lbs (23-54 kg)
• Maximum heights:
Rear-facing:
Forward-facing:
44" / 112 cm
57"/ 144 cm
• Secure the top tether anchorage strap provided with this child
restraint.
• Always use the Safe Stop® device according to manufacturer’s
instructions.
• Always use a locking clip if it is required for proper car seat
installation. Consult vehicle owner’s manual.
• Always adjust restraint harness for a comfortable and snug fit
around child. A snug harness strap should not allow any slack. It
lies in a relatively straight line without sagging. It does not press on
the child’s flesh or push the child’s body into an unnatural position.
• This car seat is not for use in homes, boats, on a motorcycle or in
any other non-specified applications or environments.
• Always keep this child car seat secured in the vehicle even when
it is unoccupied. In a crash, an unsecured child car seat system
may injure other occupants.
• In the event of an accident, the vehicle body itself provides the
most significant passenger protection. While a properly installed
car seat will improve chances for survival in most accidents, some
crashes are unsurvivable regardless of what car seat is used.
14
DEATH OR SERIOUS INJURY CAN OCCUR
• Based on accident statistics, the National Highway Traffic Safety
Administration recommends the vehicle’s rear seat as the safest
location for all children under age 13.
• Register this car seat with the manufacturer by mailing your
registration card in (See page 4) or registering online at:
us.diono.com
Child Seating Position Information
WARNING:
• Before installing car seat in a vehicle equipped with front
passenger air bags, carefully read the vehicle owner’s manual
for proper car seat installation instructions.
• This child-restraint system must be used only in a forward-facing
seating position equipped with a vehicle seat belt or LATCH
anchors. Some vehicles have no seating positions which are
compatible with this child seat. If in doubt, contact the vehicle
manufacturer for assistance.
Forward-facing vehicle seats MUST be used with this child seat.
Side-facing or rear-facing seats CANNOT be used.
• This car seat meets all applicable U.S. Federal Motor Vehicle Safety
Standards.
WARNING: Only use this child restraint in
forward-facing vehicle seats. DO NOT use this
child restraint in side-facing or rear-facing seats
in vans or station wagons.
Seats which face
sides of vehicle.
Seats which face rear of vehicle.
• This car seat is certified for use in motor vehicles and aircraft.
MISE EN GARDE: Utiliser cet ensemble de retenue
danscar
lesseat
sièges
de véhicule
qui font face
l’avant.
• Register this
with
the manufacturer
byvers
mailing
your
NE PAS utiliser cet ensemble de retenue sur des sièges qui
registration
(See
page dans
4) or les
registering
online
fontcard
faceinvers
l’arrière
fourgonnettes
ouat:
les voitures familiales.
us.diono.com
15
Sièges qui font face
aux côtés du véhicule
Sièges qui font face à l’arrière du véhicule
Safety
WARNING
Safety
Child Car Seat Safety Information
• This restraint meets all applicable U.S. Federal Motor Vehicle
Safety Standards (FMVSS 213).
• This restraint is certified for use in motor vehicles and aircraft.
• Register this restraint with the manufacturer.
Child restraints can be recalled for various reasons. To be reached
directly in the event of a recall, you must register your restraint with
the manufacturer. Fill out the included product registration card
and mail it. You can register online at us.diono.com. You can also
register by sending your name, address, the restraint’s model and
serial numbers to:
Diono LLC
PO BOX 77129
Seattle, WA 98177
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
WARNING: DO NOT place a
child car seat in the front seat of a
vehicle with a passenger air bag
unless the air bag is turned off.
DEATH or SERIOUS INJURY can
occur. The back seat is the safest.
Important:
• Before each use, always confirm car seat is securely installed
and harness is properly adjusted around the child.
Remember: The addition or removal of clothing will change
the fit of the harness, especially bulky winter jackets. Diono
recommends harnessing your child first and placing a
blanket over them or putting their jacket on backwards.
• Always confirm before each use that car seat is securely
locked in its unfolded position.
• If the vehicle seat has an adjustable seat back angle, make
sure seat back is securely locked open in its most upright
position. An incorrect seat back angle or unsecured seat back
will impair the car seat installation and its ability to protect
the child occupant.
• Cover car seat when vehicle is parked in direct sunlight. Parts
of the car seat can become hot and cause injury to a child.
• Do NOT leave any child in a vehicle alone or unattended by
an adult.
16
Safety
Important:
• Secure all personal objects inside the vehicle. In an accident,
loose objects can become flying hazards with the potential
for causing serious injury.
• Except per the instructions in this manual or as instructed by
a representative of the manufacturer, do not disassemble,
attempt to disassemble or tamper with any part of this car
seat or change the way the car seat harness or the vehicle
restraint system is used. Doing so will void the warranty.
• Do NOT use car seat if there is any appearance of rust on any
of the metal surfaces.
• Do NOT oil or lubricate any part of the car seat.
• Release levers and locking bolts should operate smoothly
and freely. When release levers are lifted, the release levers
and locking bolts should spring back immediately and
completely. Do not use car seat if release levers and/or
locking bolts wither bind or do not move freely.
• When not in use, store car seat in a climate-controlled area,
and avoid placing heavy objects on top of it.
To prevent injury to child:
• Do NOT use this car seat if it is older than 10 years from the
original date of purchase. If the original date of purchase cannot
be determined, do NOT use this car seat if it is older than 10 years
from the date of manufacture. The date of manufacture can be
found on the information label permanently affixed to the car
seat.
• If the webbing of the harness system becomes soiled and cannot
be cleaned per the instructions in this manual, the harness
system MUST be replaced. Replacement of the harness system
does NOT extend the life of this car seat beyond 10 years.
• Do NOT use car seat after it has been involved in any crash,
whether the child was present in the car seat or if the car seat was
unoccupied. Damage to the car seat may have occurred which
could impair its ability to adequately protect a child. Please call
our Customer Care team at 1-855-463-4666 so we can help you
determine if your seat needs to be replaced.
• This car seat is not a toy. Do not allow children to play with it.
• Using any non-Diono product with this car seat, or any product
not specifically approved by Diono for use with this car seat, is
not allowed. Use of such products voids manufacturer’s warranty
and may seriously impact this product’s ability to perform
properly in an accident.
17
Safety
Seat Belt Information
The information below applies only to installations using vehicle
seat belts.
Important:
• This car seat can be installed securely in most vehicles using
the seat belt. However, some seat belts have an anchoring
position for the lap belt that may not allow a secure car seat
installation.
• Some vehicles do NOT have any seating positions that are
compatible with a child car seat. Read your vehicle owner’s
manual to determine child-specific seating. Contact the
vehicle manufacturer if you have any doubts or questions.
Vehicle seat belts that are NOT compatible with this car seat are:
• Seat belts with top or bottom anchorage points attached to
the front door.
• Motor driven automatic seat belts.
• Non-locking, Emergency Locking Retractor (ELR) two-point
vehicle seat belts.
If your seat belt is one of the types listed above, choose another
seat within the vehicle or use LATCH connectors and anchorage
points. Information on the types of seat belts in your vehicle are
in the vehicle owner’s manual. See Lower Anchor weight limits for
each mode of installation (See pages 31-32 and 40-42).
Inflatable Seat Belt:
Currently this car seat is not compatible with any inflatable seat
belts. Please choose another seating position in the vehicle without
inflatable seat belts or use the lower anchors in your vehicle to
install the car seat. Consult your vehicle owner’s manual for more
information.
18
WARNING:
• Failure to properly lock the seat belt will result in an unsafe
installation that will greatly increase the potential for injury or death
to the child in an accident.
• If your vehicle lap shoulder seat belt is equipped with ELR
(Emergency Locking Retractor) that does not switch to function as
an ALR (Automatic Locking Retractor), you MUST use a locking
clip to secure lap portion of vehicle seat belt. If you have any
questions about the specific type of seat belt system in your
vehicle and its operation, consult your vehicle owner’s manual or
contact vehicle manufacturer.
For rear-facing (See pages 33-34) and forward-facing (See pages
43-44) on a lap-shoulder belt installation.
Remove locking clip from
storage location on the upper
left side car seat back.
After seat belt is tightened,
hold the lap and shoulder
portions together with one
hand. This determines the
correct seat belt length.
Using your other hand, press
and release the seat belt buckle.
While still holding the lap and
shoulder belts together, slide
the belts into the locking clip.
Re-insert seat belt buckle
tongue into buckle and check
for a tight fit at the correct belt
path for chosen installation.
If seat belt is not tight enough,
re-tighten seat belt and repeat
Steps 2 through 4.
Once seat belt is tight and
locked, follow instructions for
Top Tether Use (See page 37
for rear-facing or page 47 for
forward-facing), if applicable.
Tip: To prevent loss after use, secure locking clip in its storage
location on the back of the car seat.
19
Safety
Locking a Vehicle Lap-Shoulder Belt
with a Locking Clip
Safety
Car Seat Stability Checklist
WARNING:
• An unstable installation is NOT safe and will greatly increase the
potential for injury or death to the child in an accident.
Confirm stability of car seat after installation and before each use.
Here’s how to check:
Grasp car seat near belt path being used. Attempt to move car
seat side-to-side and front-to-back: car seat should not move
more than 1” in any direction. Car seat should stay securely
installed and the securing belt (either LATCH belt or vehicle
seat belt) must remain tightly adjusted.
If car seat does not stay securely installed, car seat installation
is NOT safe. You MUST re-install car seat according to the car
seat instructions and your vehicle owner’s manual. In order to
achieve proper installation you may need to choose an
alternate installation method or seating location within the
vehicle.
n Check for correct belt path use.
Read belt path label.
n Seat belt installed?
Is seat belt in locking mode?
n Lower anchor strap installed?
Be sure the strap is tight and not slipping loose.
n Do not grab top of seat for stability check.
n Attach top tether if appropriate anchor
is available.
n Is the seating position appropriate for
a car seat installation?
Check vehicle manual.
20
WARNING:
•Serious injury or death can result if child is not properly secured
in car seat. Confirm harness is snug before each use and after
making any car seat adjustments. A snug harness strap should not
allow any slack. It lies in a relatively straight line without sagging.
It does not press on the child’s flesh or push the child’s body into
an unnatural position.
Confirm proper car seat
installation.
T o loosen harness: lift silver lever
and pull shoulder straps forward.
Unfasten chest clip and harness
buckle, and move harness straps
to the sides.
Properly position child in car seat:
sitting upright and all the way
back in the car seat.
Position harness straps around
child and fasten harness buckle
with circle buckle pad between
buckle and child.
Confirm harness buckle is
properly fastened by gently
tugging.
Gently pull harness straps
upward to snugly fit lap portion
of harness which should fit low
on child’s body, across the hips.
Slowly pull harness adjuster strap
downward (forward-facing) or
straight up (rear-facing), using a
pull-tug, pull-tug motion, to
tighten harness for a comfortable
and snug fit around child.
21
Properly Securing Your Child
Positioning of the Harness
(Rear-facing or Forward-facing)
Properly Securing Your Child
Positioning of the Harness (cont.)
Confirm harness is not twisted
and lays flat against child.
Properly position harness chest
clip so that it is level with child’s
armpits. Fasten chest clip
together.
Do the Pinch Test
Take the thumb and index finger and ‘glide’ your fingers along
the harness at the collarbone, not necessarily trying to pinch
excess. If you are able to pinch more than half an inch of the
harness strap, the straps should be tightened down more. If you
are getting less than half an inch the harness is secured properly.
22
This car seat features an aluminum reinforced head rest lined with
EPS foam (energy absorbing foam) for advanced side impact safety
and performance.
Important: Head support is not recommended for newborns or
smaller toddlers. When your child fits at the third harness slot,
head support may be used at its lowest position.
To raise head support:
Unfasten the hook and loop located
above and below the head support.
Position hands under the very back of
the head support, tilt the top edge of
the head support slightly away from
the car seat as you raise it up.
Refasten the hook and loops.
To lower head support:
Unfasten the hook and loop located
above and below the head support.
Position hands on the very top of the
head support, tilt the bottom edge of
the head support slightly towards the
car seat as you push it down.
Refasten the hook and loops.
Important: When using the top three harness slots, position
head rest so that bottom edge is above the shoulder and about
level with the jaw. When using the bottom two harness slots,
position head rest at its highest location.
23
Properly Securing Your Child
Side Impact Head Support
Adjustment
Properly Securing Your Child
Infant Support Cushion Use
Infant Head Pillow and Body Support
This car seat features a full infant head and body support. Use of the
support cushions is optional and does not affect the safety of the seat.
Slide crotch buckle through the slot on the bottom cushion
that matches the child’s buckle position. Be sure the buckle
pad is above the bottom cushion.
Infant Head Pillow: Fasten hook and
loop tabs through the harness slots
and position the infant head pillow
in place. Connect the head pillow
hook and loop to the upper portion
of the body support pillow.
Tip: You may use the cushions up to any weight for maximum
comfort and support. Use of the support cushions is optional
and does not affect the safety of the seat.
Body Support
You can use the Body Support by itself to properly position a
toddler in the harness.
emove infant head pillow and place body support in
R
car seat for toddlers.
Slide metal crotch buckle through the slot on the bottom
portion of the cushion that matches the child’s buckle
position. Be sure the buckle pad is above the body
support.
24
WARNING:
• All harness slot positions can be used rear-facing, however, only
use the top three shoulder harness positions for forward-facing.
• When using uppermost harness position, the level of the child’s
shoulders can be above the harness slot as long as the child is the
proper height.
For a step-by-step installation, watch our video here:
www.youtube.com/DionoUSA
Max Child Height
Adjust to correct harness height before installing the car seat:
ear-facing: Straps should be
R
in nearest slot at or below the
level of child’s shoulders.
aximum Height: Rear-facing
M
child is too tall for car seat if
top of head is less than 1½”
from top of car seat or if child is
more than 44” tall (112 cm)
(See Figure 3).
REAR-FACING:
Harness slot
below shoulders
orward-facing:
F
Straps should be in nearest slot
above the level of child’s
shoulders.
FORWARD-FACING:
Harness slot
above shoulders
Maximum Height:
Forward-facing child is too tall
for car seat if tops of the ears
are above the back of the car
seat or if child is more than 57”
tall (144 cm) (See Figure 3).
Important: Child is too tall if the shoulders touch the bottom of
the adjustable head wings when they are set at their highest
position.
25
Properly Securing Your Child
Harness Straps
Properly Securing Your Child
Harness Straps (cont.)
Changing Harness Position
Loosen harness: lift silver
lever Camlock and pull
shoulder straps forward.
F rom back of car seat,
remove shoulder straps
from metal hook.
From front of car seat, pull
shoulder straps out and
re-thread them through
the correct height harness
slots.
From back of car seat,
re-attach shoulder straps
to metal hook (left strap
first).
Confirm harness straps are
not twisted and both
shoulder straps are
threaded through car seat
at the same height.
Important: Make sure loop ends of BOTH straps are threaded
completely onto the arm of the metal hook. Attach left harness
first then right harness, while looking at the back of the car seat.
26
Proper Harness Buckle Position
Confirm location of harness buckle is correct.
To ensure proper harness fit:
Place child in the car seat to determine proper harness buckle
position.
• For rear-facing, any 3 buckle positions are acceptable, as
long as the harness is snug on the child’s shoulders.
• For forward-facing, see Step 2 below.
For children 5–30 lbs: Harness buckle can be directly above its
buckle slot (Fig. A) or forward of its buckle slot (See Figure B).
For forward-facing children over 30 lbs: Always use forwardmost buckle location.
In all cases, be sure the buckle is up against the child’s body.
A
B
C
Change Harness Buckle Position
Tip: If you remove the bottom portion of the cover, the harness
buckle will be easier to adjust.
Locate correct harness buckle slot.
Unbuckle harness.
Push harness buckle strap down 2
inches into rear facing belt path
tunnel.
Guide buckle strap and metal D-ring
upward and rotate it slightly to fit through the rear-facing belt
path in the car seat bottom.
27
Properly Securing Your Child
Harness Buckle
Properly Securing Your Child
Harness Buckle (cont.)
Hold metal D-ring and then
rotate it slightly to slide it
completely through desired
slot in car seat bottom.
Firmly pull buckle upward to
confirm it is secured by car
seat bottom.
Confirm red release button
faces toward front of car seat
and buckle strap is not
twisted.
1
For larger hands or if buckle
is in position closest to child,
partially fold the car seat to
access metal D-ring through bottom of car seat.
Harness Pads
Important:
Two sets of harness pads are included:
• For children under 65 lbs., always utilize the soft harness pads
when forward-facing. Usage for rear-facing is optional.
• For forward-facing children 65 lbs. and over, use the 65 lb. +
Enhanced Harness Pads which are included in the box.
(See instructions for proper use on next page).
28
Installing Harness Pads for Children 65 lbs.
and Over
Important: Before installing these harness pads, please remove
the soft harness pads.
lace pad under harness
P
strap with rubber side
facing child.
F old sides of pad over
harness strap to fasten.
P
lace child in seat, firmly
pull harness pad webbing
forward and then down
to assure webbing and
pad fit smooth and snug
on child. Tighten harness
as per instruction manual
(see pages 21-22). Position
chest clip level with armpits and then fasten.
T hread metal end through
same slot as harness.
T hread completely back
through the slot below.
Expandable Sides
Expanding the sides of the car seat is optional and does not
compromise the safety of the seat.
Sides may be adjusted either inward or outward.
Important: Before folding the car seat, both sides must be
adjusted to their inward position (See pages 8-9 for folding
car seat).
29
Properly Securing Your Child
Harness Pads (cont.)
Rear-Facing Installation
Detachable Base (Rear-facing)
WARNING:
• Detachable base must be used only when the car seat is rear-facing.
• Do NOT use detachable base when the car seat is forward-facing.
• Do NOT use pool noodles or rolled towel in lieu of detachable base,
or to adjust the rear-facing angle of the seat.
Installing base (rear-facing only)
Confirm car sear is locked in its
unfolded position.
Confirm adjustable bottom is
flush with the bottom of the car
seat.
Align posts with holes and insert
base into the bottom of the car
seat.
S lide base back until it reaches
alignment mark on the bottom of
the car seat and secures into place.
ush in the metal tab to lock
P
base.
Removing Base
Pull metal tab out to unlock
base.
Slide base forward (the opposite
direction as shown in picture).
Pull base away from the bottom
of the car seat.
30
Retaining
hooks
WARNING:
• You must use car seat rear-facing if child is less than 1 year and
weighs less than 20 lbs (minimum requirements).
• Diono and the American Academy of Pediatrics recommend
keeping children rear-facing to the maximum rear-facing weight or
height capacities of this car seat (45 lbs. or head is less than 1.5”
from top of shell).
• Consult your pediatrician for the correct angle for newborns and
children without head control.
• You must remove SuperLATCH™ when child exceeds 35 lbs.
Re-install Radian using the vehicle seat belt (See pages 33-36).
• Read vehicle manual regarding air bags, seating positions and
warnings.
• Detachable base MUST be used with this car seat when it is
rear-facing (See page 30 for detachable base installation).
• Make sure the bottom of the seat completely contacts the vehicle
seat with no overhang.
For a step-by-step installation, watch our video
here: www.youtube.com/DionoUSA
NOTE: Detachable base
MUST be used with this car
seat when it is rear-facing
(See page 30 for detachable
base installation).
Check vehicle manual for
correct anchor location.
Confirm vehicle seating
location has its own LATCH
anchors. If it does not, you
must use vehicle seat belt
installation (See pages 33-36).
L ocate SuperLATCH™
connectors secured in storage
compartment on restraint
back. Press red release button
to remove each SuperLATCH™
connector and webbing. Slide
the narrow SuperLATCH™
attachment strap out of plastic
strap guides on side of the seat.
Loosen strap to extend its
length.
31
S lide the SuperLATCH™
through the opening
above the rear-facing
belt path label which is
on the lower portion of
the car seat. Be sure the
SuperLATCH™ strap is
flat and not twisted.
Adjustment strap should
be on the child’s right
side of car seat.
Rear-Facing Installation
Rear-facing SuperLATCH™ Installation
Rear-Facing Installation
Rear-facing SuperLATCH™ Installation
(cont.)
Place car seat so that both
the seat bottom and feet of
the detachable base are flat
on the vehicle seat. Front of
car seat should be up
against back of vehicle seat.
Connect both SuperLATCH™
connectors to the correct
lower anchors in the vehicle
seating position. The red
button will “click” and pop
up to confirm secure
attachment to anchors. Red
buttons should be facing
upward for correct fit and easy
access. To release, press the red
button. Red button will stay
down when not in use.
ush down in the middle
P
where the child sits, while
tightening the SuperLATCH™
strap. To check for a tight fit,
grab the seat near the label
that states “rear-facing belt
path” with one hand and
give it a moderate tug. It
should move less than 1
inch side-to-side, back-tofront.
Tip: If available, add the rear-facing top tether connector strap
to the appropriate anchorage and attach the top tether strap
(See page 37 for installation instructions).
Infant Support Cushion: You may use the cushions up to any
weight for maximum comfort and support.
Important: It may be necessary to move front vehicle seat
slightly forward to properly fit rear-facing car seat. The Diono
Angle Adjuster may be purchased separately to adjust recline, if
child can sit up unassisted and has full head control. Angle
Adjuster is not appropriate for a newborn.
❒ See final checklist on page 50
32
WARNING:
• You must use car seat rear-facing if child is less than 1 year and
weighs less than 20 lbs (minimum requirements).
• Diono and the American Academy of Pediatrics recommend
keeping children rear-facing to the maximum rear-facing weight
or height capacities of this car seat (45 lbs. or head is less than
1.5” from top of shell).
• Consult your pediatrician for the correct angle for newborns and
children without head control.
• Read vehicle manual to learn more about top tether anchors, air
bags, seating positions, warnings, and how a vehicle seat belt
locks.
• Detachable base MUST be used with this car seat when it is
rear-facing (See page 30 for detachable base installation).
• Make sure the bottom of the seat completely contacts the
vehicle seat with no overhang.
For a step-by-step installation, watch our video here:
www.youtube.com/DionoUSA
NOTE: Detachable base MUST be
used with this car seat when it is
rear-facing (See page 30 for
detachable base installation).
Place car seat so that both the seat
bottom and feet of the detachable
base are flat on the vehicle seat.
Front of car seat should be up
against back of vehicle seat.
Slide the seat belt through the
opening above the rear-facing belt
path label which is on the lower
portion of the car seat and insert it
into the buckle. Be sure the belt is
flat and not twisted. Check vehicle
manual on how the seat belt locks.
33
Rear-Facing Installation
Rear-facing Lap-Shoulder Belt
Installation
Rear-Facing Installation
Rear-facing Lap-Shoulder Belt
Installation (cont.)
ush down on the bottom
P
of the car seat while
pulling all the slack out of
the belt. It’s best to do
this close to the buckle.
Be sure belt is locked and
the car seat does not
move more than 1 inch
side-to-side, front-to-back
at the belt path.
Tip: If available, add rear-facing top tether connector strap to
appropriate anchorage and attach top tether strap (See page 37
for installation instructions).
Infant Support Cushion: You may use the cushions up to any
weight for maximum comfort and support.
Important: It may be necessary to move front vehicle seat
slightly forward to properly fit rear-facing car seat. The Diono
Angle Adjuster may be purchased separately to adjust recline, if
child can sit up unassisted and has full head control. Angle
Adjuster is not appropriate for a newborn.
WARNING:
• Make sure vehicle seat belt is properly locked. If your seat belt does
not lock, (See page 19 for instructions on using the locking clip).
• Failure to properly lock seat belt will result in an unsafe installation
that will greatly increase the potential for injury or death to the child
in an accident.
• Carefully read vehicle owner’s manual to determine seat belt locking
requirements or contact vehicle manufacturer.
❒ See final checklist on page 50
34
WARNING:
• You must use car seat rear-facing if child is less than 1 year and
weighs less than 20 lbs (minimum requirements).
• Diono and the American Academy of Pediatrics recommend
keeping children rear-facing to the maximum rear-facing weight or
height capacities of this car seat (45 lbs. or head is less than 1.5”
from top of shell).
• Consult your pediatrician for the correct angle for newborns and
children without head control.
• Read vehicle manual to learn more about top tether anchors, air
bags, seating positions, warnings, and how a vehicle seat belt
locks.
• Detachable base MUST be used with this car seat when it is
rear-facing (See page 30 for detachable base installation).
• Make sure the bottom of the seat completely contacts the vehicle
seat with no overhang.
For a step-by-step installation, watch our video here:
www.youtube.com/DionoUSA
NOTE: Detachable base MUST be used with this car seat when it
is rear-facing (See page 30 for detachable base installation).
Place car seat so that both the seat
bottom and feet of the detachable
base are flat on the vehicle seat.
Front of car seat should be up
against back of vehicle seat.
S lide the seat belt through the
opening above the rear-facing
belt path label which is on the
lower portion of the car seat and
insert it into the buckle. Be sure
the belt is flat and not twisted.
Check vehicle manual on how the
seat belt locks.
35
Rear-Facing Installation
Rear-facing Lap Belt Installation
Rear-Facing Installation
Rear-facing Lap Belt Installation (cont.)
Push down on the bottom
of the car seat while
pulling all the slack out of
the belt. It is best to do
this close to the buckle.
Be sure belt is locked and
the car seat does not
move more than 1 inch
side-to-side, front-to-back
at the belt path.
Tip: If available, add rear-facing top tether connector strap to
appropriate anchorage and attach top tether strap (See page 37
for installation instructions).
Infant Support Cushion: You may use the cushions up to any
weight for maximum comfort and support.
Important: It may be necessary to move front vehicle seat
slightly forward to properly fit rear-facing car seat. The Diono
Angle Adjuster may be purchased separately to adjust recline, if
child can sit up unassisted and has full head control. Angle
Adjuster is not appropriate for a newborn.
WARNING:
• Failure to properly lock seat belt will result in an unsafe installation
that will greatly increase the potential for injury or death to the child
in an accident.
• Carefully read vehicle owner’s manual to determine seat belt locking
requirements or contact vehicle manufacturer.
❒ See final checklist on page 50
36
WARNING:
• Do NOT modify vehicle without approval from vehicle
manufacturer or authorized vehicle dealer.
• Do NOT attach rear-facing top tether connector strap to any
movable mechanism of a vehicle seat. Consult vehicle manual for
recommended rear-facing tether anchor locations.
For a step-by-step installation, watch our video
here: www.youtube.com/DionoUSA
Rear-facing Top Tether Connector Strap
WARNING:
• Rear-facing top tether connector strap is ONLY to be used in
rear-facing installations.
With some vehicle models, the top tether may not fit structural
parts of vehicle seat or there may not be a suitable anchorage
point for top tether hook. It may be necessary to use the tether
connecting strap to create a tether anchorage point:
Locate the track of
vehicle seat that is
bolted directly to
vehicle frame.
rap tether connecting
W
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.
(See Figure 1)
Metal “D” Ring
Tether
hook
Tether
connecting
strap
Leg of
seat track
Now, use metal ‘D’ ring as an anchorage point for top tether
metal hook.
Note: Some vehicles
have a tether anchor
bracket attached to the
vehicle seat frame
which can be used
instead of the tether
connecting strap. If so,
connect top tether
metal hook directly to
bracket. Check your
vehicle manual or call
the manufacturer.
Tether anchor
bracket
Toward front
of vehicle
Back of the
front seat
Vehicle seat
adjustment track
37
Rear-Facing Installation
Rear-facing Top Tether Installation
Forward-Facing Installation
Safe Stop®
WARNING:
• Always use Safe Stop with forward-facing child under 40 lbs.
• Do NOT use with rear-facing child.
• Do NOT use Safe Stop with any other installation configuration.
Safe Stop is a load-limiting device designed to absorb energy and
reduce impact to a smaller, forward-facing child. When not in use,
attach Safe Stop to the fabric label sewn onto the upper back of the
car seat cover.
Remove Safe Stop from the
storage label located on the
upper left back side of the car
seat.
Remove harness straps from
metal hook of harness
adjuster strap.
Thread both harness straps
onto metal hook of Safe Stop.
Connect left harness first then
right.
Thread bottom of Safe Stop
onto metal plate of harness
adjuster.
38
WARNING:
• Adjustable bottom MUST be lowered for children 25 lbs. and over
in a forward-facing installation.
• Do NOT adjust bottom for children under 25lbs.
Important: Car seat must be locked in its unfolded position
before operating adjustable bottom.
For a step-by-step installation, watch our video
here: www.youtube.com/DionoUSA
Lowering adjustable bottom
Lift bottom bar up and over the inside channel towards the
car seat bottom to release.
Confirm adjustable bottom is locked in its lowered position.
Raising adjustable bottom
Lift bottom bar up and over the inside channel (follow the “C”
shape channel) away from the car seat bottom to securely
close.
Confirm adjustable bottom is locked in its closed position.
39
Forward-Facing Installation
Forward-facing Adjustable Bottom
Forward-Facing Installation
Forward-facing SuperLATCH™ Installation
WARNING:
• Do NOT use detachable base when car seat is forward-facing.
• Do NOT place infant in a forward-facing car seat until they are at
least 1 year old and 20 lbs.
• Diono and the American Academy of Pediatrics recommend
keeping children rear-facing to the maximum rear-facing weight
or height capacities of this car seat (45 lbs. or head is less than
1.5” from top of shell).
• ALWAYS use Safe Stop® for a forward-facing child who weighs
below 40 lbs. Do NOT use Safe Stop® for children over 40 lbs
(See page 38).
• Read vehicle manual regarding top tether anchors, air bags,
seating positions and warnings.
• Adjustable bottom MUST be lowered for children 25 lbs. and
over in a forward-facing installation. Do NOT lower bottom for
children under 25 lbs.
For a step-by-step installation, watch our
video here: www.youtube.com/DionoUSA
Check vehicle manual for correct anchor location. Confirm vehicle
seating location has its own LATCH anchors. If it does not, you must
use vehicle seat belt installation (See pages 43-46).
Locate SuperLATCH™
connectors secured in storage
compartment on restraint
back. Press red release button
to remove each SuperLATCH™
connector and webbing. Slide
the narrow SuperLATCH™
attachment strap out of
plastic strap guides on side of
the seat. Loosen strap to
extend its length.
40
If available, route the Top Tether
strap to the appropriate anchor
and connect. Do not tighten until
car seat is installed (See pages 47
for Top Tether installation
instructions).
S lide the SuperLATCH™ through
the opening above the forwardfacing belt path label which is on
the side middle portion of the car
seat. Be sure the SuperLATCH™
strap is flat and not twisted.
Adjustment strap should be on the
child’s left side of the car seat.
Connect both SuperLATCH™
connectors to the correct anchors
in the vehicle seating position.
The red button will “click” and pop
up to confirm secure attachment
to anchors. Red buttons should
be facing upward for correct fit
and easy access. To release, press
the red button. Red button will
stay down when not in use.
41
Forward-Facing Installation
nfasten fabric side panels and
U
reach behind cover for easy
access to belt path. Place car seat
in forward-facing position with
entire bottom flat on the vehicle
seat and back of car seat flat
against vehicle seat back. A gap is
acceptable as long as the top of
the car seat is firmly touching the
vehicle head rest or seat back.
Forward-Facing Installation
Forward-facing SuperLATCH™
Installation (cont.)
Push down on the car seat
(where the child sits), while
tightening the SuperLATCH™
strap. To check for a tight fit, grab
the seat near the label that states
“forward-facing belt path” with
one hand and give it a moderate
tug. It should move less than 1
inch side-to- side, back-to-front.
Remove slack from Top Tether strap if an appropriate anchor
is available (See page 47 for Top Tether installation).
❒ See final checklist on page 50
42
WARNING:
• Do NOT use detachable base when car seat is forward-facing.
• Do NOT place infant in a forward-facing car seat until they are at
least 1 year old and 20 lbs.
• Diono and the American Academy of Pediatrics recommend
keeping children rear-facing to the maximum rear-facing weight
or height capacities of this car seat (45 lbs. or head is less than
1.5” from top of shell).
• ALWAYS use Safe Stop® for a forward-facing child who weighs
below 40 lbs. Do NOT use Safe Stop® for children over 40 lbs (See
page 38).
• Read vehicle manual to learn more about top tether anchors, air
bags, seating positions, warnings, and how a vehicle seat belt
locks.
• Adjustable bottom MUST be used for children 25 lbs. and over in a forward-facing installation. Do NOT adjust bottom for
children under 25 lbs.
For a step-by-step installation, watch our video
here: www.youtube.com/DionoUSA
Unfasten fabric side panels and
reach behind cover for easy
access to belt path. Place car seat
in forward-facing position with
entire bottom flat on the vehicle
seat and back of car seat flat
against vehicle seat back. A gap is
acceptable as long as top of car
seat is firmly touching the vehicle
head rest or seat back.
If available, route the Top Tether
strap to the appropriate anchor
and connect. Do not tighten until
car seat is installed (See pages 47
for Top Tether installation
instructions).
43
Forward-Facing Installation
Forward-facing Lap-Shoulder Belt
Installation
Forward-Facing Installation
Forward-facing Lap-Shoulder Belt
Installation (cont.)
Slide the seat belt through the
forward-facing belt path behind
the fabric and buckle it. Be sure
belt is not twisted. Put seat belt in
locking mode, if necessary.
Pull shoulder portion of seat belt
to remove slack so the lap portion
is tightening down on the car
seat. It is best to do this close to
the buckle.
T o check for a tight fit, grab the
seat near the label that states
“forward- facing belt path” with
one hand and give it a moderate
tug. It should move less than1 inch side-to-side, back-to-front.
Remove slack from Top Tether strap if an appropriate anchor is
available (See page 47 for Top Tether installation).
❒ See final checklist on page 50
44
WARNING:
• Do NOT use detachable base when car seat is forward-facing.
• Do NOT place infant in a forward-facing car seat until they are at
least 1 year old and 20 lbs.
• Diono and the American Academy of Pediatrics recommend
keeping children rear-facing to the maximum rear-facing weight
or height capacities of this car seat (45 lbs. or head is less than
1.5” from top of shell).
• ALWAYS use Safe Stop® for a forward-facing child who weighs
below 40 lbs. Do NOT use Safe Stop® for children over 40 lbs (See
page 38).
• Read vehicle manual to learn more about top tether anchors, air
bags, seating positions, warnings, and how a vehicle seat belt
locks.
• Adjustable bottom MUST be used for children 25 lbs. and over in
a forward-facing installation. Do NOT adjust bottom for children
under 25 lbs.
For a step-by-step installation, watch our video
here: www.youtube.com/DionoUSA
Unfasten fabric side panels and
reach behind cover for easy
access to belt path. Place car seat
in forward-facing position with
entire bottom flat on the vehicle
seat and back of car seat flat
against vehicle seat back. A gap
is acceptable as long as top of car
seat is firmly touching the vehicle
head rest or seat back.
If available, route the Top Tether
strap to the appropriate anchor
and connect. Do not tighten until
car seat is installed (See pages 47
for Top Tether installation
instructions).
45
Forward-Facing Installation
Forward-facing Lap Belt Installation
Forward-Facing Installation
Forward-facing Lap Belt Installation
(cont.)
Slide the seat belt through
the forward-facing belt path
behind the fabric and buckle
it. Be sure belt is not twisted.
Put seat belt in locking
mode, if necessary.
Push down on the bottom of
the car seat while pulling all
the slack out of the belt. It is
best to do this close to the
buckle. Be sure belt is locked
and the car seat does NOT
move more than 1 inch
side-to-side, front-to-back at
the belt path.
T o check for a tight fit, grab at
label that states “forwardfacing belt path” with one hand and give it a moderate tug. It
should move less than 1 inch side-to-side, back-to-front.
Remove slack from Top Tether strap if an appropriate anchor is
available (See page 47 for Top Tether installation).
❒ See final checklist on page 50
46
WARNING:
• In forward-facing installations, attach top tether to approved
vehicle tether anchorage points ONLY, as labeled by vehicle
manufacturer.
• If vehicle does not have tether anchorage points, consult vehicle
owner’s manual or contact vehicle manufacturer. Do NOT modify
vehicle without approval from vehicle manufacturer or
authorized vehicle dealer.
For a step-by-step installation, watch our video here:
www.youtube.com/DionoUSA
Before installing car seat, remove top tether from storage
compartment and fully extend.
Tilt buckle and pull top tether adjuster strap to fully extend.
Loosely attach top tether to an approved anchorage point
in the vehicle using the hook at end of top tether strap.
Install car seat as shown in appropriate installation section.
Be sure installation is tight.
After installing car seat, pull top tether adjuster strap to
remove all slack. Some movement at the top of the car seat
is acceptable as long as the top tether strap remains tight.
Important: Diagram shows a variety of places you might find a
top tether anchor. Consult vehicle manual to locate correct anchor.
47
Forward-Facing Installation
Forward-facing Top Tether Installation
Booster Mode Installation
Booster Mode Installation
WARNING:
• Unsecured objects can become flying hazards and can cause
serious injury in an accident. While not required, it is
recommended to secure the car seat using the SuperLATCH™
connectors and/or the top tether in vehicles equipped with
LATCH anchors. If LATCH anchors are not available use the vehicle
seat belt to secure the car seat when unoccupied.
• Do NOT use SuperLATCH™ if installation interferes with vehicle
seat belt.
• Do NOT use as a booster with child under 50 lbs and under 40"
tall and if child’s shoulders are below the 4th harness position.
• Do NOT use as a booster unless harness straps and buckle are
removed.
• Do NOT use as a booster with only a vehicle lap belt.
• Use as a booster ONLY with lap-shoulder seat belt.
• If lap and shoulder belt portions of seat belt and seat belt buckle
are not all correctly positioned, car seat is NOT properly installed
as a booster.
• While crash testing indicates Belt Position Booster mode meets
all FMVSS213 requirements, all vehicles do NOT simulate the
crash test bench. Therefore, we recommend to use Booster Mode
only if the seat belt retracts freely and fully on its own. If NOT,
continue to use the five point harness system which gives your
child optimum protection.
For a step-by-step installation, watch our video
here: www.youtube.com/DionoUSA
This car seat may also be configured for use as a belt positioning booster.
Remove harness (See page 57, steps 1-5), then remove crotch
buckle (See page 26, steps 1-4).
Place car seat in forward-facing position with entire bottom flat
on the vehicle seat and back of the car seat flat against the vehicle
seat back. A gap is acceptable as long as the top of the car seat is
firmly touching the vehicle head rest or seat back.
If available, secure car seat with SuperLATCH™ and/or top tether.
This provides a secure installation and keeps the seat secure when
not occupied.
Properly position the child in the car seat: sitting upright and all
the way back in the car seat.
Unfasten hook and loop tabs located above and below the head
rest. Adjust head rest to proper height (page 23). Do NOT refasten
the top hook and loop tabs.
48
Place shoulder belt portion so
that belt lays properly across
child’s collarbone, interior to
the shoulder. Use the upper
belt guide on the headrest
to properly position the
shoulder belt.
Check periodically to ensure
your child has not moved out
of position and loosened the shoulder belt.
Make sure seat belt is not twisted and remove slack from
seat belt so it lays flat, smooth and snug across the child in all
locations.
Proper Buckle Position
Seat belt buckle should be correctly positioned on the outside
of the lower belt guide. If seat belt buckle is pulled across lower
belt guide and into the car seat, this is incorrect and another
seating position within the vehicle should be chosen. If child
cannot stay in correct position, we recommend continuing
use in harness mode only.
49
Booster Mode Installation
F asten Lap-Shoulder belt
across child: lap portion of
seat belt should rest within
both lower belt guides and
buckle located on the outside
of the car seat.
Final Checklist
Final Checklist
For correct installation
4 Be familiar with the parts of the car seat.
(See pages 12-13)
4 LATCH Installations: Be sure SuperLATCH™ connectors
are securely attached to correct anchors and strap is pulled
tight (See pages 31-32 for rear-facing and pages 40-41 for
forward-facing).
4 Seat Belt Installation: Be sure the seat belt is LOCKED
and pulled tight (See pages 33-36 for rear-facing and pages
43-46 for forward-facing). If your vehicle was manufactured
before 1996, you may need to use a locking clip to lock the seat
belt (See page 19).
4 DO NOT USE the seat belt and the SuperLATCH™ together
for installation.
4 Rear-facing: Grab at rear-facing belt path label, and give a
tug. If seat moves more than 1 inch side-to-side, front-to-back,
repeat steps for installation or choose another seating position.
Do not grab at top of seat to check for a tight fit.
4 Forward-facing: Grab at forward-facing belt path. If seat
moves more than 1 inch side-to-side, front-to-back, repeat steps
for installation or choose another seating position.
4 Using the Top Tether Strap for rear-facing and
forward-facing if appropriate place is available. This car seat
meets crash test standards with and without Top Tether (See
pages 37 and 47).
4 Always check for a tight installation before each ride.
Check Your Work
There are certified Child Passenger Safety Technicians across
the country available to help you. Go to www.safercar.gov to
locate your nearest technician. Car crashes are the #1 cause of
unintentional death and injuries to children. Please be sure your
child’s car seat is installed properly. Buckle up all other passengers
correctly. Stay safe!
Important: If the car seat does not stay securely installed, it
means that the car seat installation is NOT safe. You MUST
re-install the car seat according to the car seat instructions and
the vehicle owner’s manual. In order to achieve proper
installation you may need to choose an alternate installation
method or seating location within the vehicle.
50
WARNING:
• Do NOT carry the car seat by harness adjuster strap. This can
damage the mechanism and the webbing.
• Only the shoulder carry straps made by Diono are approved for
use with this car seat.
Periodically inspect release levers and locking bolts for cleanliness
and proper functioning: When release levers are lifted, release
levers and locking bolts should spring back immediately and
completely.
There are four ways to carry the car seat:
ackpack (connect
B
shoulder straps* to lower
webbing anchors on both
sides and upper carry strap
loop on back of car seat)
Red carry strap
Plastic side
Shoulder strap* (connect
shoulder strap to carry
strap loop)
*Padded shoulder strap(s) available as a separate accessory, not
included.
51
Additional Information
Carrying the Car Seat
Additional Information
Cup Holder
Cup holders can be purchased as added accessories and
attached to either side.
Each side has one cup holder slot.
Adjust side to its outward position, insert cup holder stem
into receiving slot in top of arm rest and push down until it
is securely engaged and twist to lock in place.
Tip: Before inserting the cup holder, lift the cover from the
expandable side to help you locate the holes that the cup holder
is inserted into.
52
Tip: It is not necessary to remove buckle tongues or chest clip
from harness straps when removing and replacing car seat
cover. If possible, take pictures while you are removing the cover
in order to replace the cover easily.
Removing car seat cover
Remove the harness buckle.
Remove harness shoulder straps from back of car seat, but
leave them attached to the car seat.
Undo buttons securing cover to inside of car seat bottom.
Unhook clips (bottom, side, top) securing cover to front of
car seat.
Carefully remove upper portion of cover from car seat
taking care not to damage the white EPS foam panels, and
then remove cover from bottom portion of the car seat.
Replacing car seat cover
Place cover on top of car seat.
Secure buttons to inside of car seat bottom.
Hook fasteners (bottom, side, top) securing cover to front of
car seat.
Attach harness shoulder straps to back of car seat (see pages
25-26).
Insert harness buckle.
53
Additional Information
Car Seat Cover
Additional Information
Cleaning and Maintenance
Cleaning and maintenance of release
mechanism and locking bolts
Periodically inspect release levers and locking bolts for cleanliness
and proper functioning: When release levers are lifted, release levers
and locking bolts should spring back immediately and completely.
WARNING:
• Do NOT use car seat if release levers and locking bolts do not
function properly. There may be excessive build-up of debris that
cannot be removed or internal damage to the locking mechanisms
that could prevent safe functioning.
• Do NOT oil or lubricate any part of the car seat.
• Do NOT use car seat if there is any appearance of rust on any metal
surface.
Tip: Remove debris from
release mechanism areas
with soft bristled brush.
Locking
bolts
Folding
release
lever
Removing dried liquids or food requires more
thorough cleaning
Secure car seat in its folded position (see pages 7-9, folding/
unfolding car seat).
Clean with damp cloth only. Wet cloth with warm water and
wring thoroughly so it is NOT dripping water.
Towel dry.
Confirm areas are free of debris and release mechanisms
function properly.
Important: ONLY use water to clean. Do NOT use solvents,
bleach, soap, abrasive cleaners or any detergents.
54
Clean with damp cloth only. Wet cloth with warm water
and mild soap. Wring cloth thoroughly so it is NOT dripping
water.
Towel dry.
Confirm areas are free of debris and release mechanisms
function properly.
Important: Do NOT use solvents, bleach, or abrasive cleaners.
Cleaning the cover
Remove the memory foam, do NOT machine wash.
Hand wash or machine wash cover only in front loading
machine or top loader with no agitator.
Line or air dry.
Important: Do NOT bleach. Do NOT wash cover in hot water
(See page 54 for cover removal and replacement).
Cleaning harness adjuster
Periodically inspect harness adjuster for cleanliness and proper
functioning. When lifted, harness adjuster should spring back
immediately.
Tip: Remove debris from release mechanism areas with soft
bristled brush.
C
lean with damp cloth only. Wet cloth with warm water
and wring thoroughly so it is NOT dripping water.
Towel dry.
Confirm areas are free of debris and release mechanisms
function properly.
Important: ONLY use water to clean. Do NOT use solvents,
bleach, soap, abrasive cleaners or any detergents. Do NOT
attempt to disassemble the harness or un-thread adjuster
mechanism.
55
Additional Information
Cleaning the plastic shell
Additional Information
Cleaning and Maintenance (cont.)
Cleaning harness straps
Clean with damp cloth only. Wet cloth with warm water and
mild soap. Wring cloth thoroughly so it is NOT dripping water.
Towel dry.
Important: Do NOT use solvents, bleach, or abrasive cleaners.
Do NOT soak or submerge the harness webbing.
Cleaning harness buckle
If child eats or drinks in car seat, periodically clean harness buckle
to ensure proper functioning.
Tip: Remove debris from release mechanism areas with soft
bristled brush.
Remove center buckle from car seat (See pages 27-28).
Carefully rinse ONLY the buckle mechanism in mildly hot
water or soak overnight to loosen dried liquid or hardened
food debris. Do NOT get the buckle strap wet.
Towel dry.
Confirm proper buckle functioning: repeatedly fasten and
un-fasten buckle with both tongues. If no ‘click’ is heard
confirming proper engagement after inserting each buckle
tongue, repeat cleaning procedure.
Important: ONLY use water to clean buckle. Do NOT use
solvents, bleach, soap, abrasive cleaners or any detergents. Do
NOT soak or submerge the buckle webbing.
56
Secure metal tongues into
the buckle. Remove harness
straps from the metal hook on
the back of the seat.
Pull the straps out from the
back of the seat. Remove the
harness pads and chest clip
from each side.
Slide the harness strap out of
the metal tongues.
Using a Phillips head
screwdriver, take out screws
and remove access panels on
both sides of car seat bottom.
(Figure 4).
Remove old harness straps
from seat.
Insert new harness strap
through slot in metal frame
(Figure 6a), pull strap until
metal D-ring is inside the
cavity (Figure 6b).
Re-fasten access panels in
place with screws.
Slide shoulder harness straps
through the metal tongues.
Attach chest clip and harness
pads to each harness strap.
Slide the harness straps into
the back of the car seat and
attach to the metal hook.
57
Additional Information
Replacing Harness Straps
Additional Information
Aircraft Installation
Important: This seat is certified by the Federal Aviation
Administration (FAA) for use ONLY as a harnessed restraint.
This restraint is NOT certified for use in an aircraft as a beltpositioning booster. Call airline to confirm the car seat will fit
your specific aircraft. Diono’s Angle Adjuster (sold separately)
may be beneficial. Seat belt extender will be necessary for
rear-facing installation.
For a step-by-step airplane installation, watch
our video here: www.youtube.com/DionoUSA
Rear-facing aircraft
installation (Figure 1)
• A
djust seat belt buckle to its
shortest length to ensure
buckle is accessible for release.
• Ask flight attendant for ‘seat
belt extender,’ and then use this
extender to adjust seat belt
length.
• Follow remaining installation
instructions on page 35.
Forward-facing aircraft
installation (Figure 2)
• Follow installation instructions
on page 45. Do NOT use top
tether for aircraft installation.
58
Important: If you purchased your seat online, check with your
retailer on their return policies and keep the original box and
packaging and save purchase receipt for your records.
Diono, LLC. warrants its proprietary products to the
original end-user retail purchaser as follows:
LIMITED ONE-YEAR WARRANTY This product is
warranted against physical defects in materials or
workmanship as a result of normal use for one year
from the date of original retail purchase. Proof of
purchase is required. The exclusive remedy for this
warranty is that Diono will upon return of the product
to Diono and determination of any such defect, at its
sole option replace, repair or provide replacement
components for this product. Diono reserves the right
to discontinue or change fabrics, parts, models or
products, or to make substitutions. To make a claim
under this warranty, contact Diono Customer Care at
1-855-463-4666.
Visit us.diono.com for complete warranty information
and details.
Revised 3/2016
59
Additional Information
Warranty Information
®
convertible + booster
product:
radian ® rXT
convertible + booster
model series:16000
mfg. by:
Diono US
14810 Puyallup Street E
Suite 200
Sumner, WA 98390
Customer Care
Tel: 1 855 463 4666
us.diono.com
@dionoUSA
© 2016 Diono LLC. All rights reserved. radian rXT US Eng 07152016