Dimplex Cavendish CSH20, Chesford CSD20, Opti-mystCavendish CSH20, Opti-mystChesford CSD20 User Instructions

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

Cavendish CSH20, Chesford CSD20

08/50756/1 Issue 1

Fig.1

Fig.2

Fig.3

300

657

160

310

310

405

310 350

Min.

590

Fig.4

Fig.5

Fig.6

Fig.7

Fig.8

Fig.9

Fig.10

Fig.11

Fig.12

Fig.13

Fig.14

Fig.15

Fig.16

Fig.17

Fig.18

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 Remote Control and batteries
are packed separately in the carton.
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’.
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
Do not put Opti-myst plastic components into a
dishwasher.
Only slide out the drawer when the water tank needs
to be  lled or a lamp needs to be changed otherwise
you will inadvertently alter the water level and the
 ame e ect operation.
Only use  ltered tap water in this appliance.
Always ensure that the appliance is sitting on a level
 oor.
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’.

Model: Cavendish CSH20 (Brass Inset), Chesford CSD20 (Titanium Inset)

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  re, 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  xed
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  re 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
quali ed 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 the Warning symbol
indicating that it must not be covered.

Dimplex Opti-myst Inset Fires

Installation Instructions
Before installing this appliance, 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, in the event
of moving or returning the appliance to your supplier.

To install the appliance;

1. Remove the  replace grate, ashpan etc.

2. The ashbed grate should be stored away for possible
future use.

3. Clean the hearth of any ash residue or dust etc.
At the rear of the appliance, two adjustable supports are
provided for levelling, where the base of the  replace
opening is raised above the level of the hearth.
You are now ready to install the electric  re into your
 replace.
Make sure the unit is switched OFF.
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 exits at the front
of the  re, at the right or left hand corner to suit your
supply socket location and 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 cover. Raise the canopy cover to access the
controls. (See Fig.2 for Manual Control lay out)
Switch ‘A’:- Controls the electricity supply to the heater.
Note: This switch must be in the ‘ON’ ( I ) position for the
heater to operate with or without heat.

Switch ‘B’:- Controls the function of the  re.

Press

once to turn on  ame e ect. This will be

indicated by one 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 intensity of the  ame

e ect.

Turning the control knob Clockwise increases
the  ame e ect, turning the control knob Anti

Clockwise will decrease the  ame e ect.

Control Knob ‘D’:- Controls the Electronic Thermostat
setting.

Turning the control knob Clockwise will decrease
the temperature setting, turning the control knob
Anti Clockwise will increase the temperature setting.

LED ‘E’:- When this is illuminated it indicates that the water
tank is empty. You will hear two beeps.
When the water is empty the main lamps 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.

Electronic Thermostat
The thermostat controls the heat output according to the
room temperature. This ensures that the heater will not
produce heat unnecessarily when the room is warm.
To set the temperature you require, turn the thermostat
control knob ‘D’ (See Fig.2) Anti-Clockwise until the
desired temperature is reached. Alternatively to heat
a cold room quickly, turn the thermostat control knob
‘D’ (See  g.2) up fully. When the room has reached the
desired temperature, turn the thermostat control knob
‘D’ (See Fig.2) clockwise until the desired heat setting is
achieved.
The heater will now automatically operate at this
temperature.

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 fuel e ect.
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.

Battery Information.

1. Unclip the battery cover on the back of the remote
control. (See Fig.7)

2. Install AAA batteries into the remote control.

3. Replace the battery cover.

Discard leaky batteries.
Dispose of batteries in the proper manner according to
provincial and local regulations.
Any battery may leak electrolyte if mixed with a di erent
battery type, if inserted incorrectly, if all the batteries are
not replaced at the same time, if disposed of in a  re, or if
an attempt is made to charge a battery not intended to be
recharged.

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.

Tips for using your appliance.

1. Only pull out the drawer when its time to re ll the
water tank or change a lamp, otherwise it may lead to
excess water in the sump and reduced  ame e ect. If this
happens empty the water from the sump as instructed
under ‘Maintenance’.

2. 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.

3. Do not tilt or move the  re while there is water in the
tank or sump.

4. Make sure that the  re is on a level  oor.

5. The  ame control knob ‘C’ Fig.2 may be turned up or
down to give a more realistic e ect.

6. Sometimes the  ames appear more real when the  ame
control knob is turned down.

7. 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 ATTEMPTING ANY MAINTENANCE

Changing lamps.

If a large amount of 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, gently pull the drawer fully
out by the tab. (See Fig.3)

2. View the lamps from a distance in front of the  re and
observe which lamp 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 water tank by lifting upwards and place in
a sink.

6. Remove the sump as described in the Cleaning Section.

7. Remove the defective lamp, by gently lifting vertically
and disengaging the pins from the lamp holder, (See Fig.4
and 5). 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.)

8. 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 5).

9. Replace the Sump and water tank and carefully close
the drawer.

10. Switch on.

Filling the water tank.

When using the appliance for the  rst time or when the
water level warning light comes on, you will hear 2 audible
‘beeps’ when the water is empty and the tank needs
re lling, follow these steps.

1. Press Switch ‘A’ to (0) (See Fig.2)

2. Gently pull out the drawer as far as possible by the tab.
(See Fig.3)

3. Remove the water tank by lifting upwards and
outwards.

4. Place the water tank in sink and remove cap, Anti­clockwise to open. (See Fig.6)

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 push the drawer back in as far as it will go.

9. Press Switch ‘A’ to ‘ON’ ( I ) position (See Fig.2)

10.Press Switch ‘B’ once to turn on  ame e ect. (See
manual control section and Fig.2)

Air  lter.

1. Press Switch ‘A’ to the ‘OFF’ (0) position (See Fig.2)

2. Gently pull the drawer out as far as possible. (See Fig.3)

3. Remove the tank and place in a sink with the cap facing
upwards.

4. Gently slide upwards the air  lter plastic holder. (See
Fig.17)

5. Remove the  lter combination from the plastic holder.

6. Gently rinse with water in the sink and dry with fabric
towel before returning.

7. Replace the  lter combination making sure that the
course black  lter is in contact with the plastic holder. (See
Fig.18)

8. Replace the tank.

9. Close the drawer fully.

10. Press Switch ‘A’ to the ‘ON’ ( I ) position (See Fig.2)

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.

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 and Seal, Sump lid, 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 pull the drawer out as far as possible. (See Fig.3)

3. Remove the water tank by lifting upwards.

4. Disconnect the electrical connector, located on the
left side of the sump, by  rst loosening the two retaining
screws and gently withdrawing the connector. (See Fig.8)

5. Release the lower sump locking tabs by turning 90º, this
allows the sump to be lifted completely from its location.
(See Fig.9)

6. Gently lift up the sump assembly, taking care to keep
level so as not to spill any water. Sit the assembly in the
sink. (See Fig.10)

7. Release the two upper sump locking tabs by turning
90º, then lift o the sump lid. (See Fig.11)

8. Carefully tilt, as shown, so that the liquid drains out of
the sump. (See Fig.12)

9. Put a small amount of washing up liquid into the sump,
and using the supplied brush, gently clean all surfaces
including the metal discs and the rubber seal located
in the top grooved surface. Do not remove the rubber
seals. (See Fig.13 and 14)

10. When cleaned, thoroughly rinse the sump with clean
water.

11. Clean the outlet surface of the sump lid with the brush
and  ush out thoroughly with water. (See Fig.15 & 16)

12. Reverse the above steps to reassemble.

Symptom Cause Corrective Action

The  ame e ect will
not start.

Mains plug is not plugged in.

Switch A is in the ‘ON’ (I) position, but
mode Switch B has not been pressed. (See
Fig.2)
Low water level.

Low voltage connector not connected
properly. (See Fig.8)

Check plug is connected to wall socket
correctly.

Press Switch B once for  ame e ect.(See
Fig.2)
Check ‘Low water level’ warning LED ‘E’
under canopy hood. (See Fig.2). If ‘ON’  ll
water tank.

Check that the connector is inserted
correctly. (See Fig.8)

The  ame e ect is
too low.

Flame e ect control knob is set too low.
(See Fig.2)
The water in the sump may be too high
due to the drawer being opened and
closed a number of times, water tank
removed a number of times, or the  re has
been moved.

Metal Disc at the base of Sump might be
dirty (See Fig.13)

Increase level of  ame by turning Control
knob C clockwise slowly. (See Fig.2)
If water level in the sump is more than
40mm, the sump should be removed and
emptied in the sink.

Clean Metal Discs with soft brush supplied.
(See Fig.13) See ‘Maintenance.’ for a step by
step procedure.

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

anticlockwise to minimum and slowly turn
clockwise, about ¼ a turn, at a time. Give
the  ame generator some time to adjust
before increasing. (See Fig.2)

Main lamps are not
working and there
are no  ames or
smoke.

LED ‘E’ Fig.2 is Lit.

LED ‘E’ Fig.2 is not Lit.

Follow instructions under Mainte-
nance, ‘Filling the water tank’.

Check the plug is connected to wall
socket correctly.
Switch ‘A’ Fig. 2 is in the ‘ON’ ( I ) posi­tion.
Press switch ‘B’ Fig.2 until you can hear
one beep only, for  ame e ect.

Troubleshooting

.

Opti-myst is a trade mark of Dimplex UK Ltd
This product is protected by one or more of the following patents : PCT/ EP2005/009774, PCT/ EP2007/002207, GB0717773.6, GB0717772.8,

GB0717770.2, GB0809322.1The design of this product is protected by EU Design Rights

Dimplex UK Limited
Millbrook House
Grange Drive
Hedge End
Southampton
Hampshire. SO30 2DF

www.dimplex.co.uk

Republic of Ireland Tel. [phone]

[c]Dimplex UK Limited
All rights reserved. Material contained in this publication may not be reproduced in whole or in part, without prior permission in writing of
Dimplex UK Limited.