Dimplex DNV20AB User manual

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A division of GDC Group Ltd
Millbrook House Grange Drive Hedge End Southampton SO30 2DF
www.dimplex.co.uk
Re
g
istered No: 1313016 En
g
land
VAT GB 287 1315 50004
EEE Producer Registration Number –
WEE/GE0057TS
Paper from sustainable sources

DANVILLE
DNV20AB, DNV20BR, DNV20BL & DNV20CH
The product complies with the European Safety Standards EN60335-2-30 and the European Standard Electromagnetic Compatibility (EMC)
EN55014, EN60555-2 and EN60555-3 These cover the essential requirements of EEC Directives 2006/95/EC and 2004/108/EC
08/51445/0 Issue 3

Fig.1
Fig.2 Fig.3
Fig.4 Fig.4a

Fig.5
Fig.6
Fig.6a Fig.7
Fig.8 Fig.9

Fig.10
Fig.11
Fig.12

Dimplex Opti-myst Inset Fires
Model: DNV20AB, DNV20BR, DNV20BL, DNV20CH
IMPORTANT: THESE INSTRUCTIONS SHOULD BE READ CAREFULLY AND RETAINED FOR FUTURE REFERENCE
Important Safety Advice:
When using electrical appliances, basic precautions should always be followed to reduce the risk of fire,
electrical shock and injury to persons, including the following:
If the appliance is damaged, check with the supplier before installation and operation.
Do not use outdoors.
Do not use in the immediate surroundings of a bath, shower or swimming pool.
Do not locate the heater immediately below a fixed socket outlet or connection box.
This appliance is not intended for use by children or other persons without assistance or supervision if their
physical, sensory or mental capabilities prevent them from using it safely. Children should be supervised to
ensure that they do not play with the appliance.
Do not use this heater in series with a thermal control, a program controller, a timer or any other device that
switches on the heat automatically, since a fire risk exists when the heater is accidentally covered or displaced.
Ensure that furniture, curtains or other combustible material are positioned no closer than 1 metre from the
heater.
In the event of a fault unplug the heater.
Unplug the heater when not required for long periods.
Although this heater complies with safety standards, we do not recommend its use on deep pile carpets or on
long hair type of rugs.
The appliance must be positioned so that the plug is accessible.
If the supply cord is damaged it must be replaced by the manufacturer or service agent or a similarly qualified
person in order to avoid a hazard.
Keep the supply cord away from the front of the heater.
WARNING: In order to avoid overheating, do not cover the heater. Do not place material or garments on the
heater, or obstruct the air circulation around the heater.
The heater carries a DO NOT COVER warning.
General.
Unpack the heater carefully and retain the packaging for possible future use, in the event of moving or returning the re to
your supplier.
The re incorporates a ame eect, which can be used with or without heating, so that the comforting eect may be enjoyed
at any time of the year. Using the ame eect on its own only requires little electricity.
The heater is designed for use inset into a 407mm (16”) or 457mm (18”) wide by 559mm (22”) high replace opening or
freestanding - see also section ‘Installation Instructions’.
A 2kw fan heater is discreetly positioned in the canopy of the re provides heating in cold weather. Switching allows half
or full heat. A distance of 1 metre (39”) must be maintained between the front of the heater and any surrounding furniture,
overhanging curtains or other obstrustions.
To reduce heat loss and to prevent any chimney up draft aecting the operation of your inset re we recommend they the
chimney ue is sealed o.
Before connecting the heater check that the supply voltage is the same as that stated on the heater.
Please note: Used in an environment where background noise is very low, it may be possible to hear a sound which is related
to the operation of the ame eect. This is normal and should not be a cause for concern.
Electrical connection.
WARNING – THIS APPLIANCE MUST BE EARTHED.
This heater must be used on an AC ~ supply only and the voltage marked on the heater must correspond to the supply voltage.
Before switching on, please read the safety warnings and operating instructions.
PLEASE RETAIN THIS USER’S GUIDE FOR FUTURE REFERENCE
Only use ltered tap water in this appliance.
Always ensure that the appliance is sitting on a level surface.
If you intend not using the appliance for longer than 2 weeks, drain the water from sump and water tank and dry the
sump.
Once installed, never move this appliance or lay on its back, without draining the water from sump and water tank.
The water tank, sump, sump lid, tank cap and air lters must be cleaned once every two weeks, particularly in hard
water areas.
The appliance should never be operated if the lamps are not working.
The lamps should be regularly inspected as described under ‘Maintenance’ and ‘Changing lamps’.

Installation Instructions
Before installing this appliance in an existing chimnney, we recommend that;
1. You have your chimney cleaned by a competent chimney sweep.
2. You block o the chimney ue.
This procedure is important for the ecient operation of the heating unit and will also reduce heat loss up the chimney.
Installation.
Ensure that all packing items are removed (read any warning labels carefully).
Retain all packing for possible future use e.g. in the event of moving or returning the appliance to your supplier.
To install the appliance;
1. Clean the area where the re will be installed e.g remove ash residue from an existing replace.
2. Use the two adjustable supports at the rear of the appliance to ensure that the re is level.
3. Make sure the unit is switched OFF.
4. Hold the re by the sides of surround and gently manoeuvre into position. Plug the re into a 13amp/240 volt outlet. Ensure
that the supply cable is not trapped under the re such that it might cause it to be damaged.
Before using the manual controls rstly ll the water tank (See‘Maintenance’, ‘Filling the water tank’).
Manual Controls.
The Opti-myst manual controls are located beneath the hinged canopy. Raise the canopy to access the controls. (See Fig.2 for
Manual Control lay out)
Switch‘A’:- Controls the electricity supply to the Fire.
Note: This switch must be in the ‘ON’( I ) position for the Fire to operate either with or without heat.
Switch ‘B’:- Press once to turn on the ame eect. This will be indicated by an audible beep. Although the main lights
operate immediately it will take a further 30 seconds before the ame eect starts.
Press again to give ame eect and half heat. This will be indicated by two beeps.
Press again to give ame eect and full heat. This will be indicated by three beeps.
Press again to return to ame eect only. This will be indicated by one beep.
Press to put re in to standby mode. This will be indicated by one beep.
Control Knob ‘C’:- Controls the Thermostat setting.
Turning the control knob Anti Clockwise will decrease the temperature setting, turning the control knob Clockwise
will increase the temperature setting.
Control Knob ‘D’:- Controls the intensity of the ame eect.
Turning the control knob Anti Clockwise increases the ame eect, turning the control knob Clockwise will decrease
the ame eect.
When the water in the tank and in the sump runs out the main lamps will go out. See instructions under ‘Maintenance’, ‘Filling
the water tank’. When this procedure is complete, the main lamps will illuminate but it will take 30 seconds before the ames
return.
Setting the Thermostat
Plug in and switch on the re to the full heat setting. Turn the Control Knob ‘C’ fully clockwise (max temperature setting) to
warm the room rapidly. When the room temperature has reached the desired level, turn the thermostat knob back slowly until
you hear the thermostat just click o. The heater will then maintain the room temperature at the chosen level.
Note: Should your heater fail to come on when the thermostat is at a low setting, this may be due to the room temperature
being higher then the thermostat setting
Thermal safety cut-out
A thermal safety cut-out is incorporated in the fan heater to prevent damage due to overheating. This can happen if the heat
outlet was restricted in any way or if the chimney ue has not been blocked o eectively. If the cut-out operates, unplug the
heater from the socket outlet and allow approximately 10 minutes before reconnecting. Before switching the heater back on
remove any obstruction that may be restricting the heat outlet, then continue normal operation.
Caution: In order to avoid a hazard due to inadvertent resetting of the thermal cutout, this appliance must not be supplied
through an external switching device, such as a timer, or connected to a switch that is regularly switched on and o by the
utility.

Tips for using your appliance.
1. With the ame setting on minimum the unit will use approximately 40ml of water per hour and will last 3 times as long than
when it is at maximum ame setting.
2. Do not tilt or move the re while there is water in the tank or sump.
3. Make sure that the re is on a level oor.
4. The ame control knob ‘D’ Fig.2 may be turned up or down to give a more realistic eect.
5. Sometimes the ames appear more real when the ame control knob is turned down.
6. Give the ame generator some time to react to changes you may make on the ame control knob.
Maintenance
WARNING: ALWAYS DISCONNECT FROM THE POWER SUPPLY BEFORE BEGINNING ANY MAINTENANCE
Changing lamps.
If the smoke appears grey or colourless it may be that one or more lamps have failed.
You can check for lamp failure as follows.
1. Leaving the ame eect on, lift out the fuelbed and water tank. (See Fig.3)
2. It should be possible to view the lamps with the nozzle (See Fig.4) in place and observe which one needs to be changed.
3. Put Switch ‘A’ in the ‘OFF’ position, and unplug the re from the mains.
4. Leave the appliance for 20 minutes to allow the lamps to cool down before removing them.
5. Remove the sump as described in the Cleaning Section.
6. Remove the defective lamp, by gently lifting vertically and disengaging the pins from the lamp holder, (See Fig.4 and 4a).
Replace with a Dimplex Opti-myst, 12V, 50W, Gu5.3 base, 8º beam angle, coloured lamp. (Purchased from www.dimplex.co.uk
under the section ‘After Sales Service’, details of how to purchase the lamps are contained therein.)
7. Carefully insert the two pins of the new lamp into the two holes in the lamp holder. Push rmly in place. (See Fig.4 and 4a).
8. Replace the sump, nozzle, water tank and fuelbed.
9. Switch on.
Filling the water tank.
When the water tank is empty, the ame and smoke eect shuts o and you will hear 2 audible beeps, follow these steps.
1. Press Switch ‘A’ to (0) (See Fig.2)
2. Gently lift out the fuelbed and set aside carefully. (See Fig.3)
3. Remove the water tank by lifting upwards and outwards.
4. Place the water tank in sink and remove cap, Anti-clockwise to open. (See Fig.5)
5. Fill tank with ltered tap water only.This is necessary to prolong the life of the ame and smoke producing unit.
The water should be ltered through a conventional domestic water lter unit and the lter should be replaced regularly.
6. Screw the cap back on, do not overtighten.
7. Return the tank to the sump, with the tank cap facing down and the at side of the tank facing outward.
8. Gently place the fuelbed back into position.
9. Press Switch ‘A’ to ‘ON’ ( I ) position (See Fig.2)
Cleaning.
WARNING – ALWAYS DISCONNECT FROM THE POWER SUPPLY BEFORE CLEANING THE HEATER.
We recommend cleaning the following components once every 2 weeks, particularly in hard water areas:-
Water Tank, Sump, Nozzle, Tank cap and seal, Air lter.
For general cleaning use a soft clean duster – never use abrasive cleaners. To remove any accumulation of dust or u the soft
brush attachment of a vacuum cleaner should occasionally be used to clean the outlet grille of the fan heater.
Water tank
1. Remove water tank, as described earlier, put into sink and empty water.
2. Using the supplied brush gently rub the inside surfaces of the cap paying particular attention to the rubber ring in the outer
groove and the centre rubber seal.
3. Put a small quantity of washing up liquid into the tank, ret the cap and shake well, rinse out until all traces of washing up
liquid are gone.
4. Rell with ltered tap water only, replace the cap, do not overtighten.
Sump
1. Press Switch ‘A’ to the ‘OFF’ (0) position
2. Gently lift out the fuelbed and place carefully on the ground. (See Fig.3)
3. Remove the water tank by lifting upwards.
4. Disconnect the electrical connector, located on the right side of the sump. (See Fig.6) .
5. Release the right sump locking tabs by turning 90º, this allows the sump to be lifted completely from its location. (See Fig.6a)
6. Gently lift up the sump, taking care to keep level so as not to spill any water. Sit the assembly in the sink.
7. Release the left sump locking tabs by turning 90º, then lift o the Nozzle. (See Fig.4)
8. Lift out the transducer and carefully tilt, as shown, so that the liquid drains out of the sump. (See Fig.8)

9. Put a small amount of washing up liquid into the sump, and using the supplied brush, gently clean all surfaces in the sump
and gently clean the transducer including the metal discs located in the top grooved surface. (See Fig.9)
10. When cleaned, thoroughly rinse the sump with clean water to remove all traces of washing up liquid.
11. Clean the outlet surface of the sump lid with the brush and ush out thoroughly with water. (See Fig.10)
12. Reverse the above steps to reassemble.
Air lter.
1. Press Switch ‘A’ to the ‘OFF’ (0) position (See Fig.2)
2. Gently lift out the fuelbed and place carefully on the ground. (See Fig.3)
3. Gently slide the air lter upwards out of its plastic holder. (See Fig.11)
4. Gently rinse with water in the sink and dry with fabric towel before returning.
5. Replace the lter making sure that the coarse black lter is facing the front of the re.
6. Replace the fuelbed.
7. Press Switch ‘A’ to the ‘ON’ ( I ) position (See Fig.2)
Remote Control Operation
On the control panel, Switch A (see Fig.2) must be in the ‘ON’ ( I ) position in order for the remote control to operate. There are 3
buttons on the remote control. (See Fig.7) To operate correctly the remote must be pointed towards the front of the grate. (See
Fig 12). The remote control functions are as follows:
Press once to turn on Flame eect only.
This will be indicated by one beep.
Press once to turn on Half Heat and Flame Eect.
This will be indicated by two beeps.
Press again to turn on Full Heat and Flame Eect.
This will be indicated by three beeps.
Standby
This will be indicated by one beep.
Recycling.
For electrical products sold within the European Community. At the end of the electrical products useful life it should
not be disposed of with household waste. Please recycle where facilities exist. Check with your Local Authority or
retailer for recycling advice in your country.
After Sales Service.
Your product is guaranteed for one year from the date of purchase. Within this period, we undertake to repair or exchange this
product free of charge (excluding lamps & subject to availability) provided it has been installed and operated in accordance
with these instructions. Your rights under this guarantee are additional to your statutory rights, which in turn are not aected
by this guarantee.
Should you require after sales information or assistance with this product please go to www.dimplex.co.uk where you will
nd our self help guide by clicking on “After Sales” or ring our help desk on 0845 600 5111 (UK) or 01 842 4833 (R. O. I.). Spare
parts are also available on the web site. Please retain your receipt as proof of purchase.
Patent / Patent Application
Products within the Optimyst range are protected by one or more of the following patents and patent applications:
Great Britain GB 2402206, GB 2460259, GB 2460453 , GB 2418014, GB 2465738, GB 2449925, GB 2465537 , GB 2455277 ,
GB1020534.2, GB1020537.5, GB1110987.3
United States US 7967690, US 2010299980, US 2011062250, US 2008028648, US 13/167,042
Russia RU2008140317
European EP 2029941, EP 2201301, EP 2315976, EP 1787063, EP07723217.1 , EP11170434.2, EP 11170435.9
China CN 101883953, CN 200980128666.2, CN 101057105, CN 101438104
Australia AU 2009248743, AU 2007224634
Canada CA 2725214, CA 2579444, CA 2645939
International Patent Application WO 2006027272
South Africa ZA 200808702
Mexico MX 2008011712
Korea KR 20080113235
Japan JP 2009529649
Brasil BR P10708894-9
India IN 4122/KOLNP/2008
New Zealand NZ 571900

Troubleshooting
Symptom Cause Corrective Action
The ame eect will
not start.
Mains plug is not plugged in.
Low water level.
Low voltage connector not connected properly.
(See Fig.6)
The Transducer Unit is not sitting correctly in
the sump
Check plug is connected to wall socket correctly.
Check that the water tank is full and there is
water in the sump.
Check that the connector is inserted correctly.
(See Fig.6)
Ensure the Transducer in sitting down into the
moulded recess in the sump
The ame eect is too
low.
Flame eect control knob is set too low.
(See Fig.2)
The Metal Disc in the transducer might be dirty
(See Fig.12)
The wire from the Transducer Unit is sitting over
the metal disc
Increase level of ame by turning Control knob
‘D’ anti clockwise slowly. (See Fig.2)
Clean the Metal Disc with soft brush supplied.
(See Fig.12) See ‘Maintenance.’ for a step by step
procedure.
Direct the wire to the back of the sump and
make sure it sits into the side slot exiting the
sump.
Unpleasant smell when
unit is used.
Dirty or stale water.
Using unltered tap water.
Clean the unit as described under maintenance.
Use only ltered tap water.
The ame eect has
too much smoke.
Flame eect setting is too high. Turn the ame eect Control knob C clockwise,
about ¼ a turn, at a time. Give the ame
generator some time to adjust to the new
setting. (See Fig.2)
Main lamps are not
working and there are
no ames or smoke.
There is no water in the water tank Follow instructions under
Maintenance, ‘Filling the water tank’.
Check the plug is connected to the wall socket
correctly and that Switch‘A’ Fig. 2 is in the
‘ON’ ( I ) position.

Opti-myst is a trade mark of GDC Group Ltd.
DIMPLEX
MILLBROOK HOUSE
GRANGE DRIVE
HEDGE END
SOUTHAMPTON
SO30 2DF
TEL: [phone]
FAX: [phone]
WEBSITE: www.dimplex.co.uk
Republic of Ireland Tel. [phone]
[c] GDC Group Ltd,
All rights reserved. Material contained in this publication may not be reproduced in whole or in part, without prior permission in writing of
Dimplex.
A division of GDC Group Ltd,