General.

Unpack the heater carefully and retain the packaging for 

possible future use, in the event of moving or returning 

the fire to your supplier. The  Remote Control and batteries 

are packed separately in the carton.   

The fire incorporates a flame effect, which can be used 

with or without heating, so that the comforting effect may 

be enjoyed at any time of the year. Using the flame effect 

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 fireplace 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 flame effect. 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 filled or a lamp needs to be changed otherwise 

you will inadvertently alter the water level and the 

flame effect operation.

Only use filtered tap water in this appliance.

Always ensure that the appliance is sitting on a level 

floor.

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 filters 

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 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 the Warning symbol 
indicating that it must not be covered.

Dimplex Opti-myst Inset Fires

UK