3
INTRODUCTION
This instruction serves mainly for the user of this storage tank. It contains basic technical
information and steps necessary for putting the boiler into operation, for its smooth
attendance and basic rules of maintenance. Some chapters and information written in this
instruction are also meant as an informative guide for specialised organisations which will
carry out assembly of the appliance at user's.
WARNING!
To ensure the operation of the appliance without failures and because of own safety, it is
necessary to study this manual thoroughly and follow the steps and instructions included. The
part of the manual is also a record on putting the appliance to operation that will be made by
an authorised company. The list of authorised service organisations and the letter of
guarantee is a part of this manual. If the record is not filled properly, it can be a reason for not
acknowledging the reclamation.
All this manual together with the letter of guarantee and record on putting to operation must
be therefore kept carefully.
GENERAL TECHNICAL DESCRIPTION
The appliance works as a gas storage heater of water with waste gas exhaust to the flue. It
operates on natural gas. The appliance consists of a steel tank with a ceramic layer, outside
cover with thermal insulation of high quality, combined gas fitting, gas burner and
accessories.
PRINCIPLE OF WORKING
When putting the heater into operation, the ignition flame is burned with the help of a
piezoelectric lighter that burns the flame of the main burner. Heat arising from gas burning is
transferred through the bottom of the steel tank and smoke tube in the storage tank. After
reaching the temperature set by a thermostat (40-72), position 4: (about 55°C), the main
burner goes off automatically and only the ignition flame stays burning which is working non-
stop. The output of ignition burner is very low (about 100 W) and heat arising from burning is
used for further keeping the water temperature in the storage tank. Possible loses are
therefore minimalized.
The storage tank is equipped by a waste-gas thermostat that serves against back passage of
waste gas. When there is a failure in the waste gas exhaust, the operation of the heater is
stopped and gas supply into gas fitting is broken. Cutting out the sensor from the thermal fuse
circuit is inadmissible.
Polyurethane insulation keeps the reached water temperature with high effectivity (decrease
of water temperature is about 0.8 1°C/h). When the temperature in the storage tank decreases
in 5-6°C or when higher amount of hot water is taken off and cold water flows after, the
regulation thermostat enables reignition of the main burner and water is heated to the
temperature adjusted by a regulation button of gas fitting.
A combined safety valve (0,6 MPa) with a non-return flap valve that is activated for pressure
higher than 0,6 MPa is a part of the appliance. The valve opens when the pressure in hot water
distribution overcomes the critical value. After pressure decreasing the valve will close
automatically.
