diono radian rxt manual 2014

The Diono Radian RXT is a premium 3-in-1 convertible car seat designed for children from 5 to 120 pounds. It features steel alloy frame construction, superior side impact protection, fold-flat design for travel, adjustable head support, and multiple recline positions. Below are key sections for safety, features, installation, setup, operation, and troubleshooting.

1. Features at a Glance 2. Installation 3. First-Time Setup 4. Specifications 5. Controls and Settings 6. Harness Adjustment 7. Convertible Modes 8. Safety Features 9. Care & Cleaning 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: Steel alloy frame, adjustable headrest, 5-point harness system, foldable design, multiple recline positions.

Feature	Description
Steel alloy frame	Provides superior strength and durability
Adjustable headrest	12-position headrest with SafeStop technology
5-point harness system	Quick-adjust harness with chest clip
Foldable design	Folds flat for easy storage and travel
Multiple recline positions	3 recline positions for comfort
Side impact protection	Energy-absorbing foam and deep wings
Infant insert	Removable for smaller children
Cup holders	Two removable cup holders
LATCH system	Easy vehicle installation
Seat belt installation	Alternative installation method

Installation

Unpack and inspect contents. Read all instructions before installation.

Choose vehicle seating position: Use rear seat only, away from airbags.
Select installation method: LATCH system or vehicle seat belt.
Adjust recline angle: Use recline knob for proper angle (45° for rear-facing).
Secure car seat: Tighten LATCH straps or seat belt until secure.
Check installation: Seat should not move more than 1 inch side-to-side.

WARNING! Always install in vehicle rear seat. Never place in front of active airbags.

First-Time Setup

Prepare car seat for first use with proper configuration.

Remove packaging: Remove all plastic wraps and tags.
Install infant insert: For children under 1 year or under 20 lbs.
Adjust harness height: Position harness at or below shoulders for rear-facing.
Set recline angle: Use angle indicator for proper positioning.
Install cup holders: Attach to sides of seat base.

CAUTION! Ensure harness is properly adjusted and secure before each use.

Specifications

Weight Capacity: 5-120 pounds
Height Limit: Up to 57 inches
Modes: Rear-facing (5-45 lbs), Forward-facing (20-80 lbs), Booster (50-120 lbs)
Dimensions: 28" H x 17" W x 16.5" D
Weight: 26.5 pounds
Materials: Steel frame with energy-absorbing foam

Harness Slots: 12 adjustable positions

Recline Positions: 3 positions

Certifications: FMVSS 213 compliant

Controls and Settings

Access adjustments via harness adjuster, recline knob, and headrest controls.

Harness System: Quick-adjust harness, chest clip, buckle release.

Headrest: 12-position adjustment with SafeStop technology. Recline: 3-position recline knob with angle indicator. Installation: LATCH connectors, seat belt path guides. Accessories: Cup holders, infant insert, travel bag compatible.

Harness Adjustment

Proper harness fitting is essential for safety.

Adjust harness height: Move headrest to proper slot position.

Tighten harness: Pull adjuster strap until snug.

Check fit: Harness should be tight, chest clip at armpit level.

Rear-facing: Harness at or below shoulder level.

Forward-facing: Harness at or above shoulder level.

Tip: You should not be able to pinch any harness webbing at the shoulder.

Convertible Modes

Three modes accommodate growing children.

Rear-facing mode: 5-45 pounds, harness at or below shoulders.

Forward-facing mode: 20-80 pounds, harness at or above shoulders.

Booster mode: 50-120 pounds, uses vehicle seat belt.

Transition between modes: Follow specific instructions for each conversion.

Proper positioning: Ensure correct recline angle for each mode.

WARNING! Keep children rear-facing as long as possible, at least until age 2.

Safety Features

Advanced safety technologies for maximum protection.

SuperLATCH system: Easy installation with 65 lb weight limit. SafeStop harness: Energy-absorbing technology for forward-facing mode. Side impact protection: Deep wings with energy-absorbing foam. Steel frame: Aircraft-grade aluminum and steel alloy construction. Quick-adjust harness: One-pull tightening system.

Care & Cleaning

Remove covers and harness for cleaning according to instructions.

CAUTION! Do not machine wash harness straps. Use mild soap and water only. Air dry covers completely before reassembly.

Regulatory Information

FMVSS 213 compliant. Meets or exceeds all federal safety standards. Copyright © 2014 Diono; all rights reserved. For support, visit www.diono.com or contact 1-855-463-4666.

Troubleshooting

Symptom Possible Cause Corrective Action

Seat moves excessively Loose installation Retighten LATCH or seat belt; check vehicle seat compatibility.

Harness difficult to adjust Twisted straps Straighten harness straps; check for obstructions.

Child uncomfortable Improper recline Adjust recline angle; check harness height position.

LATCH connectors hard to attach Vehicle seat design Try seat belt installation; ensure proper LATCH anchor access.

Headrest won't adjust Obstruction Check for twisted harness; press both adjustment buttons simultaneously.

Service: 1-855-463-4666; www.diono.com

diono radian rxt manual 2014 © - All Rights Reserved 2025

Symptom	Possible Cause	Corrective Action
Seat moves excessively	Loose installation	Retighten LATCH or seat belt; check vehicle seat compatibility.
Harness difficult to adjust	Twisted straps	Straighten harness straps; check for obstructions.
Child uncomfortable	Improper recline	Adjust recline angle; check harness height position.
LATCH connectors hard to attach	Vehicle seat design	Try seat belt installation; ensure proper LATCH anchor access.
Headrest won't adjust	Obstruction	Check for twisted harness; press both adjustment buttons simultaneously.