1. Introduction
Thank you for choosing the Dimplex Opti-Myst Pro 500 20-Inch Built-in Electric Cassette. This electric cassette is designed to provide a realistic flame and smoke effect, enhancing the ambiance of your living space. This manual provides essential information for the safe installation, operation, and maintenance of your unit. Please read it thoroughly before installation and retain it for future reference.
Image 1.1: The Dimplex Opti-Myst Pro 500 20-Inch Built-in Electric Cassette. This image shows the front view of the black metal cassette unit, designed for built-in installation, featuring the opening where the flame and smoke effect will be visible.
2. Important Safety Information
Read all instructions and warnings carefully before installation or use to reduce the risk of fire, electric shock, or injury to persons.
- Ensure the power supply voltage matches the rating label on the appliance.
- Do not operate any unit with a damaged cord or plug, or if the heater has malfunctioned or been dropped or damaged in any manner.
- Always disconnect power before cleaning or performing any maintenance.
- Do not immerse the unit in water.
- Keep combustible materials, such as furniture, pillows, bedding, papers, clothes, and curtains at least 3 feet (0.9 m) from the front of the unit.
- This appliance is for indoor use only. Do not use outdoors.
- Do not block air openings or exhaust vents.
- Use only distilled water in the water reservoir to prevent mineral buildup and ensure optimal performance.
3. Package Contents
Carefully remove all components from the packaging and check against the list below. Ensure all items are present and undamaged. If any items are missing or damaged, contact your retailer.
- Dimplex Opti-Myst Pro 500 20-Inch Built-in Electric Cassette (CDFI500-PRO)
- Remote Control
- User Manual (this document)
- Note: A power cord is required for operation and may need to be purchased separately. Consult your electrician for appropriate wiring.
4. Setup and Installation
4.1. Unpacking
- Remove the unit from its packaging. Retain packaging for future transport or storage.
- Inspect the unit for any shipping damage. Do not install if damaged.
4.2. Placement and Clearances
- The Opti-Myst Pro 500 is designed for built-in installation. Ensure the opening dimensions are suitable for the unit's dimensions: 12"D x 20"W x 9.5"H.
- Maintain a minimum clearance of 3 feet (0.9 m) from the front of the unit to any combustible materials.
- Ensure the installation location is level and stable.
4.3. Electrical Connection
- This unit requires a corded electric connection. Consult a qualified electrician to ensure proper wiring and to install an appropriate power cord if one is not supplied.
- Ensure the electrical supply meets the unit's requirements (refer to specifications section).
- Do not use extension cords.
4.4. Water Reservoir Filling
- Locate the water reservoir within the unit.
- Carefully remove the reservoir and fill it with distilled water only. Do not use tap water, as mineral deposits can affect performance.
- Replace the reservoir securely in its position.
5. Operating Instructions
5.1. Basic Operation
- Ensure the unit is properly installed and connected to power.
- Press the main power button on the unit or the remote control to turn on the flame and smoke effect.
- The unit will begin to produce the Opti-Myst flame and smoke effect.
5.2. Remote Control Functions
The included remote control allows for convenient operation of your Opti-Myst Pro 500.
- Power On/Off: Activates or deactivates the flame and smoke effect.
- Heat Control: Adjusts the heat output. Options include full-heat and half-heat settings.
- Flame/Smoke Effect On/Off: Toggles the visual effect independently of the heat.
6. Maintenance
Regular maintenance ensures the longevity and optimal performance of your Dimplex Opti-Myst Pro 500.
6.1. Cleaning
- Always disconnect power before cleaning.
- Wipe the exterior surfaces with a soft, damp cloth. Do not use abrasive cleaners or sprays.
- Periodically clean the water reservoir and transducer assembly to prevent mineral buildup.
6.2. Transducer Maintenance
The transducer is crucial for producing the mist effect. Mineral buildup on the ceramic disk can reduce performance.
- Carefully remove the transducer unit from the water reservoir.
- Open the transducer housing and gently clean the ceramic disk with a soft brush or cloth. Do not use harsh chemicals.
- Rinse with distilled water and reassemble.
- Note: If the ceramic disk is heavily scaled or damaged, it may require replacement. Contact Dimplex customer support for replacement parts.
7. Troubleshooting
Refer to the table below for common issues and their solutions.
| Problem | Possible Cause | Solution |
|---|---|---|
| Unit does not turn on. | No power supply; power cord not connected; main switch off. | Check power connection; ensure power cord is securely plugged in; verify main power switch is on. |
| No flame or smoke effect. | Water reservoir empty; transducer dirty or faulty; effect switch off. | Fill water reservoir with distilled water; clean transducer (see Maintenance); ensure flame/smoke effect is enabled via remote or unit controls. |
| Reduced mist production. | Mineral buildup on transducer ceramic disk; low water level. | Clean transducer ceramic disk thoroughly; ensure water reservoir is adequately filled with distilled water. |
| Remote control not working. | Dead batteries; remote out of range; obstruction. | Replace batteries; ensure remote is pointed at the unit within range; remove any obstructions. |
If the problem persists after attempting these solutions, contact Dimplex customer support.
8. Specifications
| Feature | Detail |
|---|---|
| Model Number | CDFI500-PRO |
| Brand | DIMPLEX |
| Product Dimensions (D x W x H) | 12" x 20" x 9.5" (30.5 cm x 50.8 cm x 24.1 cm) |
| Item Weight | 22 Pounds (10 kg) |
| Material | Metal |
| Color | Black |
| Power Source | Corded Electric |
| Installation Type | Built In |
| Heat Output | 785 British Thermal Units |
| Special Feature | Corded, Remote Control |
| UPC | 781052113053 |
9. Warranty and Support
9.1. Limited Warranty
The Dimplex Opti-Myst Pro 500 is covered by a Limited Warranty. Please refer to the warranty card included with your product or visit the official Dimplex website for detailed terms and conditions. This warranty typically covers defects in materials and workmanship under normal use.
9.2. Customer Support
For technical assistance, replacement parts, or warranty inquiries, please contact Dimplex customer support. Have your model number (CDFI500-PRO) and purchase date available when contacting support.
You can find contact information on the official Dimplex website or through your product retailer.





