OKT20 - Electric fireplace DIMPLEX - Free user manual and instructions

Product Type	Electric Fireplace
Model	OKT20
Brand	Dimplex
Dimensions (H x W x D)	1050 x 450 x 250 mm
Weight	20 kg
Power Supply	220-240V ~ 50Hz
Power Consumption	2000 W (max)
Heat Output	2000 / 1000 W (high/low)
Heating Coverage	Up to 40 m²
Flame Effect	3D LED flame with adjustable brightness
Thermostat	Adjustable thermostat (5-30°C)
Remote Control	Yes, included
Timer	1-8 hours
Installation	Wall-mounted or freestanding
Safety Features	Overheat protection, tip-over switch, cool-touch glass
Certifications	CE, UKCA
Material	Steel, glass, plastic
Color	Black / Dark grey
Cleaning	Use dry cloth; do not use abrasive cleaners
Warranty	2 years

Frequently Asked Questions - OKT20 DIMPLEX

How to install the Dimplex OKT20?

The OKT20 can be installed as freestanding or wall-mounted. For wall mounting, use the included bracket and ensure it is securely attached to a wall stud. Keep a clearance of at least 0.5 m from furniture and curtains. Refer to the manual for exact dimensions.

Can I use the fireplace without heat?

Yes, the flame effect can be used independently of the heater. Press the flame button on the remote or control panel to turn on the LED flames without activating the heating element.

How to clean the glass?

Always unplug the unit and let it cool before cleaning. Use a soft, dry cloth to wipe the glass. For stubborn marks, lightly dampen the cloth with water and a mild detergent. Avoid abrasive cleaners or sharp objects.

Is it safe for pets and children?

The unit features a cool-touch glass front and a tip-over switch that automatically shuts off the heater if it is knocked over. However, always supervise children and pets near the fireplace.

How to reset after overheating?

If the fireplace overheats, it will automatically shut off. Unplug the unit, wait 10-15 minutes for it to cool down, then plug it back in. If the issue persists, check for obstructions in the air vents and contact support.

Can I mount it on a wall?

Yes, the OKT20 is suitable for wall mounting. Use the provided bracket and screws. Ensure the wall is load-bearing and the bracket is level. Follow the installation diagram in the manual.

How to replace the LED bulb?

The LED lights are integrated and not user-serviceable. If the flame effect fails, contact Dimplex customer service for assistance. Do not attempt to open the unit yourself.

What is the recommended room size?

The heater can effectively warm a room up to 40 m² (approx. 430 sq ft) when used as a supplementary heat source. Larger rooms may require additional heating.

How to use the remote control?

Insert two AAA batteries (not included) into the remote. Point it at the fireplace receiver (front panel) and press the desired button: Power, Flame, Heater, Timer, etc. Range is about 6 meters.

Does it have a timer?

Yes, the timer can be set from 1 to 8 hours in 1-hour increments. After the set time, the heater and flame effect will turn off automatically.

USER MANUAL OKT20 DIMPLEX

Modern gas stove burner with visible flames and white gravel on a dark wall (no text or symbols)

opti-myst

Contents

03 What should Opti-myst look like?
04 Opti-myst Components
05 What do I need to do?
08 Do's and Don'ts
09 Troubleshooter
10 Q+A
11 Important Contacts

What should an Opti-myst look like?

Interior scene of a Gosford gas stove with wooden flooring and a black oven, no visible text or symbols on the main subject.

Interior living room scene featuring a black wall-mounted gas stove with flames and a white armchair, next to a black cushion with 'L' and 'VE' text (no signage on main objects)

Modern home furn with a black and white fire extinguisher, placed in a glossy room with greenery and a window (no text or symbols visible)

Opti-myst components

Water Tank:
Ensure that the water tank is filled with filtered water. See 'Filling the water tank' in your instructions

Transducer Unit

Nozzle

Air Filter

THE MAGIC OF AN OPTI-MYST FIRE

There's nothing quite like the effect of a fire. It creates a wonderful feeling of comfort and cosiness. Looking deceptively real, an Opti-myst fire will capitivate you from the moment you see it. The fully 3-dimensional effect creates authentic looking 'flames' and 'smoke' delivering a warm and cosy atmosphere to any room.

Revolutionary technology

The flame and smoke effect is created using ultrasonic waves which atomise water to create an extremely fine mist. This is not steam since the water is at room temperature and, therefore, the "flames" are safe to touch.

As the mist is so fine it does not add significantly to the humidity of the room.

Realistic fire effect

After much testing, Dimplex has fine-tuned the ultrasonic transducer to produce the most realistic flame and smoke effect possible.

Special effect lighting

The light bulbs have two functions in an Opti-myst fire. The heat produced enables the water mist to rise up through gaps in the log fuel bed in a flame-like manner. They also illuminate the water mist with the orange glow of a real fire. These bulbs are dichroic, enabling an accurate representation of flame-like colour.

Silhouette of a mountainous landscape with no text or symbols

3D diagram of a battery pack with internal components and labeled parts (no text or symbols)

"The Opti-myst effect is just great. It's the only product out there that can give this level of realism." A satisfied customer.

Anti-microbial additives

For added peace of mind, an anti-microbial substance has been added into the plastic material used in Opti-myst fires.

Also, a study at the Microbiology Department, University College Cork concluded that the unit offers no risks to use from a microbiological perspective.

Easy to clean

It is recommended to use filtered water Opti-myst fires. If tap water is used, a build up of limescale can seriously hinder the production of flame and smoke effect.

However, if a build up of limescale does occur, the plastic materials used have a highly polished finish to ensure easier cleaning and removal of limescale.

The sump can even be placed in a dishwasher.

Flickering flames

A small fan blows the water mist out of the sump and over the light bulbs. Adjustments of this fan enable the user to control the size of flame arising from their fire.

What do I need to do?

Stoves / Suites

Hand placing a dark, textured object into a black oven (no visible text or symbols)

1. Turn off and remove fuel bed 2. Lift water tank out of stove 3. Check wires are still secure
   

Hand placing a brown object into an orange container on a black tray (no visible text or symbols)

Close-up of a hand holding an orange electronic device with a red flame, next to a black electronic device (no visible text or symbols)

Close-up of a hand holding an open brass cylindrical device mounted on a stand, with no visible text or symbols.

1. Fill water tank with filtered water and place back into stove

Person cleaning a car trunk with a blue cloth (no visible text or symbols)

1. Replace fuel bed back into stove

1. Heating setting and flame only option

1. Control height of flame

When turning on the fire please do the following:

• Switch fire on (0-1).
• Press the flame button.
• Fire will beep to confirm.
• Wait for 30 seconds until you hear a click.
• Flame effect will begin.

What do I need to do?

Wall Fires

Close-up of white, irregularly shaped objects against a dark background, possibly biological or mechanical components (no text or symbols visible)

1. Turn off and remove pebbles or logs

Hand pouring yellow granular substance into a dark container with orange liquid (no text or symbols visible)

1. Lift water tank out of wallhung

Close-up of a hand holding an orange electronic device with a red LED, next to a black tray (no visible text or symbols)

1. Check wires are still secure

Hand holding a golden cylindrical object with a small protrusion, possibly a mechanical part or component (no visible text or symbols)

1. Fill water tank with filtered water and replace in wallhung

Close-up of hands arranging white oval-shaped objects on a dark surface (no text or symbols visible)

1. Replace pebbles or logs back into wallhung

Close-up of a black keyboard key with a white power button (no text or symbols visible)

1. Turn on using switch

1. Heating setting and flame only option

Black and white photo of a flame with a vertical strip of rectangular shapes on a dark textured background (no text or symbols)

1. Control height of flame

When turning on the fire please do the following:

• Switch fire on (0-1).
• Press the flame button.
• Fire will beep to confirm.
• Wait for 30 seconds until you hear a click.
• Flame effect will begin.

What do I need to do?

Insets

Hand placing a dark object into a curved metal frame (no visible text or symbols)

1. Turn off and remove log bed 2. Lift water tank out of inset 3. Check wires are still secure
   

Hand pouring yellow liquid into a dark container with orange contents (no text or symbols visible)

Close-up of a hand using a handheld device to press or install a red object on an orange surface (no visible text or symbols)

Hand holding a golden glass bottle with a small cylindrical object inserted (no visible text or symbols)

1. Fill water tank with filtered water

1. Make sure the water bottle is securely fitted

Close-up of a hand placing coal into a dark container with metal grilles (no visible text or symbols)

1. Place log bed back into the fire

Close-up of a hand holding a black electronic device with control knobs and a small display (no visible text or symbols)

1. On and off switch

1. Heating setting and flame only option and height of flame

When turning on the fire please do the following:

• Switch fire on (0-1).
• Press the flame button.
• Fire will beep to confirm.
• Wait for 30 seconds until you hear a click.
• Flame effect will begin.

Do's and dont's

Remember to carry out regular maintenance on the Opti-myst by cleaning the transducer

Don't allow the water to stand for more than two weeks.

Don't use de-ionised water. The auto shut off needs the minerals in the water to detect water level in the sump.

Do use filtered water wherever possible.

Only use the water tank to refill the sump unit.

Remind the customer to register for the second year of the warranty.

Abstract fiery flame with orange and yellow hues against a dark background (no text or symbols)

Troubleshooter

Abstract fiery flame with orange and dark tones, no text or symbols visible

Q. How can I stop the stove door from misting up?

A. Sometimes on start up the stove door can mist up. This will stop when the temperature of the stove equates. You can easily resolve this by opening the stove door slightly and ensuring that the flame effect is turned right down.

Q. Why are the lamps on but there is no flame effect?

A. This is the fan unit which may need to be replaced, a short term solution is to remove the air filter (see pg. 4) and turn the flame effect to maximum.

Q. The Lights are coming on but the unit is not starting?

A. Take out the log set and double check the transducer is working properly. If the transducer is okay check the transducer wire is secure.

Q. Why is the flame effect beginning to look dull?

A. Check that all lamps are illuminated and clean. If the lamp is off ensure it is securely fitted properly, if the lamp stays off the lamps will need to be changed.

(For replacement bulbs please contact Operational Queries.)

Q+A

Q. What is the power consumption when fire is flame only?

A. The Opti-myst fire uses 212 watts when operating in flame only mode.

Q. Will the Opti-myst add to the humidity of the room?

A. No - it is equivalent to having someone else with you in the same room breathing normally.

Q. What lamp does the Opti-myst use?

A. The lamps are 12V,50W, Gus.3 base" beam angle coloured lamps.

Q. Is the Opti-myst easy to clean?

A. Yes - the sump unit, nozzle and water tank can be cleaned with washing up liquid or even go in the dish-washer!

Abstract fiery flame with orange and dark tones, no text or symbols visible

Important contacts

Abstract fiery flame with orange and dark tones, no text or symbols visible

Any queries please contact:

08448 793588

And select option 2

Or

Email us at:

[e-mail]

DCDimplex®