Diono Radian 3 RX - User Manual

READ INSTRUCTION MANUAL
before using this child restraint
radian
®
3 RX
car seat
Instruction Manual
from birth up to 120 lbs
All-in-one convertible

Summary

Safe Use Specifications

Rear-Facing Weight and Height Limits

Specifies limits for rear-facing use: 5-45 lbs, 44 inches or less.

Forward-Facing Weight and Height Limits

Specifies limits for forward-facing use: 20-65 lbs, 57 inches or less.

Booster Mode Weight and Height Limits

Specifies limits for booster mode use: 50-120 lbs, 57 inches or less.

Infant Rear-Facing Requirement

Safe Use Checklist and Warnings

Proper Car Seat Installation Checks

Details how to ensure tight installation and secure harness fit.

Frontal Airbag Safety Warning

Warns against placing the restraint rear-facing with an active front airbag.

Critical Safety Warnings

Installation and Use Prohibitions

Lists forbidden installation methods and usage restrictions (e.g., side-facing, unsecured).

Product Integrity and Modifications

Warns against using damaged seats, unapproved accessories, or modifying the restraint.

Product Integrity and Safe Practices

Expiration and Damage Policy

States the restraint is unusable if damaged, expired, or missing parts.

Correct Child Restraint Installation

Airbag Prohibitions for Rear-Facing

Reiterates the warning against rear-facing installation with active front airbags.

Proper Harness Securing Techniques

Details how to adjust harness straps snugly and securely for the child.

Top Tether Installation and Use

Top Tether Attachment Procedures

Initial Setup and Harness Adjustment

Child Harness Setup and Fit

Forward-Facing Harness Positioning

Harness Strap Height for Forward-Facing

Rear-Facing Installation Methods

Rear-Facing LATCH Installation

Instructions for installing the car seat rear-facing using the LATCH system.

Rear-Facing Seat Belt Installation

Instructions for installing the car seat rear-facing using the vehicle's lap/shoulder belt.

Rear-Facing LATCH Installation Steps

Installing the Detachable Base

Extending and Attaching LATCH Straps

Advanced Rear-Facing LATCH Procedures

Routing LATCH Straps for Installation

Tightening and Testing LATCH Installation

Covers tightening the LATCH strap and testing for a secure installation.

Rear-Facing Seat Belt Installation

Routing and Buckling Seat Belt

Tightening and Testing Seat Belt Fit

Explains how to tighten the seat belt and test the installation's tightness.

Rear-Facing Lap Belt Installation

Testing Lap Belt Installation Tightness

Covers tightening the lap belt and testing the installation's security.

Forward-Facing Installation Overview

Forward-Facing Weight and Mode Notes

Forward-Facing LATCH Installation

Forward-Facing Belt Path Routing

Forward-Facing LATCH and Tether Setup

Extending and Routing LATCH Straps

Forward-Facing LATCH Installation Steps

Securing LATCH Connectors and Straps

Covers attaching LATCH connectors, tightening straps, and testing for tightness.

Tightening and Removing Top Tether

Forward-Facing Seat Belt Installation

Routing and Securing Vehicle Seat Belt

Forward-Facing Seat Belt Tightening and Testing

Tightening Vehicle Seat Belt

Testing Forward-Facing Seat Belt Tightness

Explains how to test the tightness of the seat belt installation.

Forward-Facing Lap Belt Installation

Routing and Securing Lap Belt

Top Tether and Lap Belt Tightening

Forward-Facing Lap Belt Tightening and Testing

Tightening Vehicle Lap Belt

Testing Forward-Facing Lap Belt Tightness

Explains how to test the tightness of the lap belt installation.

Booster Mode Installation

Booster Mode Weight and Belt Requirements

Specifies weight limits and mandates using lap and shoulder belts for booster mode.

Child and Belt Placement in Booster Mode

Securing Your Child

Initial Child Placement and Harnessing

Harness Adjustment and Securing

Changing Harness Position

Tightening Harness and Chest Clip

Belt Locking Clip and Safe Stop Usage

Safe Stop Installation and Use

Harness Strap Removal and Replacement

Diono Radian 3 RX Specifications

General

Weight Capacity	5-120 lbs
Rear-Facing Weight Limit	5-50 lbs
Forward-Facing Weight Limit	22-65 lbs
Booster Mode Weight Limit	40-120 lbs
Maximum Height Recommendation	57 inches
Harness Type	5-point
Height Limit (Rear-Facing)	44 inches
Recline Positions	3
Folding	Yes
Installation Type	LATCH or seat belt
Material	Steel and energy-absorbing foam
Safety Features	Side-impact protection, energy-absorbing foam
Car Seat Type	Convertible