1. Important Safety Information
Please read this manual thoroughly before operating the Rinnai RDT-31S gas clothes dryer. Keep this manual for future reference.
WARNING: Do not dry towels or clothing with oil stains (e.g., beauty oils) even after washing, as there is a risk of spontaneous combustion. Ensure all items are thoroughly cleaned and free of flammable substances before drying.
This appliance must be installed by a qualified professional in accordance with local regulations and the manufacturer's instructions.
2. Product Overview
The Rinnai RDT-31S is a compact gas clothes dryer designed for efficient and convenient laundry drying. It features multiple drying courses and user-friendly controls.
Key Features
- Compact design: Width 55cm x Depth 50.6cm x Height 60.9cm
- Drying Capacity: Up to 3.0 kg
- Gas cord connection type
- Multiple drying courses including Standard, Eco, and Thick Clothes
- Digital display for remaining drying time
- Adjustable drying timer
Drying Courses

Image: Overview of the various drying courses available on the Rinnai RDT-31S dryer, showing different types of laundry.
- Standard Course: Ideal for everyday laundry such as underwear and shirts. Dries quickly and finishes fluffy.
- Thick Clothes Course: Designed for items like jeans and thick bath towels. Ensures thorough drying without leaving any dampness.
- Delicate Course: For heat-sensitive items like nylon stockings and frills. Dries gently to protect delicate fabrics.
- Shoe Drying: The RDT-31S series supports drying small items like shoes using optional accessories.
Eco Course for Economical Operation

Image: Comparison of the Eco Course and Standard Course, highlighting reduced cost and drying time for the Eco Course.
The Eco Course operates economically by automatically switching between hot air and cool air drying. This intelligent control helps reduce running costs while effectively drying your clothes. For example, it can reduce gas costs and drying time compared to the standard course.
3. Setup and Installation
Proper installation is crucial for the safe and efficient operation of your Rinnai RDT-31S gas clothes dryer. This appliance requires professional installation.
Door Opening Direction

Image: Illustration demonstrating how the dryer door can be configured for left or right opening, depending on installation needs.
The door opening direction is set to left-opening by default at the time of shipment. However, it can be changed to right-opening at the installation site to suit your specific layout. Consult your installer for this adjustment.
Gas Connection
The RDT-31S uses a gas cord connection. Ensure that the gas supply line is correctly installed and connected by a certified technician. Refer to the detailed installation manual provided with the product for specific requirements.
4. Operating Instructions
The Rinnai RDT-31S is designed for simple, fully automatic operation.
Basic Operation
- Load laundry into the dryer.
- Select the desired drying course (Standard, Eco, Thick Clothes, Delicate).
- Press the Start button. The dryer will operate automatically until drying is complete.
- Upon completion, the dryer will automatically stop and notify you with a buzzer.
Digital Display and Timer Function

Image: Digital display indicating the remaining drying time and timer settings.
The digital display shows the estimated remaining drying time, allowing you to manage your time effectively. You can set the drying time from 5 to 90 minutes in 5-minute increments (for times over 30 minutes, increments are 10 minutes). This is convenient for quick drying or warming up items like towels and pajamas.
Control Panel Layout

Image: The control panel of the Rinnai RDT-31S, showing the digital display, course selection buttons, timer, and power switch.
The control panel is designed for clear visibility and ease of use. It includes a digital display, filter lamp, power switch, start/stop switch, course selection buttons, and timer switch. Refer to the image for the exact layout and function of each control.
5. Maintenance
Regular maintenance ensures the longevity and optimal performance of your Rinnai RDT-31S gas clothes dryer.
Lint Filter Cleaning
- Clean the lint filter after every use to maintain drying efficiency and prevent fire hazards.
- Locate the lint filter, typically inside the dryer door opening.
- Remove accumulated lint by hand or with a soft brush.
- Reinsert the filter securely before the next use.
Exterior Cleaning
- Wipe the exterior surfaces with a soft, damp cloth.
- Do not use abrasive cleaners or solvents, as they may damage the finish.
6. Troubleshooting
If you encounter issues with your Rinnai RDT-31S dryer, refer to the following common problems and solutions. For complex issues, contact a qualified service technician.
Common Issues
- Dryer does not start:
- Check if the power cord is securely plugged in.
- Ensure the gas supply valve is open.
- Verify the door is fully closed.
- Check if a circuit breaker has tripped.
- Clothes are not drying properly:
- Clean the lint filter.
- Do not overload the dryer; ensure proper air circulation.
- Select an appropriate drying course for the fabric type and load size.
- Check the exhaust vent for blockages.
- Unusual noises or vibrations:
- Ensure the dryer is level and stable.
- Check for foreign objects in the drum.
7. Specifications
Technical specifications for the Rinnai RDT-31S Gas Clothes Dryer.
| Feature | Specification |
|---|---|
| Brand | Rinnai |
| Model | RDT-31S |
| Capacity | 3 kg |
| Color | White |
| Product Dimensions (D x W x H) | 50.6 cm x 55 cm x 60.9 cm |
| Product Weight | 24.5 kg |
| Product Type | Clothes Dryer |
| Door Opening | Left (changeable) |
| Gas Connection | Gas cord connection |
| Power Source | AC100V (50/60Hz shared) |
| Gas Consumption (LPG) | 2.91kW (0.208kg/h) ~ 1.40kW (0.100kg/h), OFF |
| Gas Consumption (13A) | 2.91kW (2,500kcal/h) ~ 1.40kW (1,200kcal/h), OFF |
| Gas Consumption (12A) | 2.71kW (2,330kcal/h) ~ 1.30kW (1,120kcal/h), OFF |
| Power Consumption (50Hz) | 160W |
| Power Consumption (60Hz) | 190W |
| Standby Power Consumption (50/60Hz) | 0.8W |
| Ignition Method | High voltage continuous discharge ignition |
| Safety Devices | Flame failure safety device, leakage safety device, clothes thermistor, exhaust temperature thermistor, overheat prevention device, door switch, drum rotation detection, fan rotation detection |
| ASIN | B07JGJFRTF |
8. Warranty and Support
The Rinnai RDT-31S gas clothes dryer comes with a 1-year warranty from the date of purchase. Please retain your proof of purchase for warranty claims.
For technical support, service, or warranty inquiries, please contact Rinnai customer service or your authorized dealer. Refer to the contact information provided in your product packaging or on the official Rinnai website.