12
Antifrost system, frost-free liquids, additional mixtures or inhibitors
Boiler is equipped with antifrost system that activates boiler for heating, when the temperature of water at
the inlet into the heating system decreases under 6°C. Mechanism is not active, if appliance is
disconnected from electricity or gas. If it is necessary, it is possible to use frost-free liquids, additional
mixtures or inhibitors, but exclusively in case, that producer of the liquids or additional mixtures
guarantees, that his products are suitable for use and do not cause damage of the boiler exchanger or other
boiler parts and heating system. It is forbidden to use routine frost-free substances, additional mixtures or
inhibitors which are not exclusively intended for use in appliances producing heat and which are not
suitable for materials of boiler and distribution system.
Gas connection
Before boiler connecting, the gas connection has to be tested and revised. After boiler connection, all the
gas connections have to be tested for tightness, including pipes and armatures in boiler. Gas distribution
pipes in hte building must be done in conformity with valid norms STN EN 1775. Dismantable
connections of the gas pipes and D.H.W. pipes must not be strained by any other additional powers.
Connection to electricity mains
Boiler is intended for connection to electrical socket of 230V/50Hz placed near boiler by movable inlet
cable. Connection to electricity has to be in conformity with norm STN 33 2000-4-46, where the socket
has to be equipped with middle safety bar connected to the PE conductor.It is not allowed to use different
distributors and extension cords. Electrical voltage has to be 230V/50Hz. Plug installation, room
thermostat connection and service of electrical parts must be performed by person with special
electrotechnical qualification under the ordinance 50/1978 Zb.
Boiler is equipped with inlet electrical cable without plug. Connection to mains must be done tightly and
they must be equipped with bipolar switch with minimum contact distance of 3mm, with integrated fuse of
3A max between boiler and mais. By electrical connections it is necessary to keep polarity (PHASE:
brown conductor / ZERO: blue conductor / PROTECTION: yellow-green conductor).
Boiler is equipped with inlet electrical cable without plug. Connection to mains must be done stationary,
accessorized with bipole switch, with minimum 3mm distance of contacts, max 3A fuse engaged between
boiler and mains. It is important to keep polarity by electrical connections (PHASE:brown conductor /
ZERO: blue conductor / PROTECTION:yellow-green conductor). By installation or exchange of
electrical cable it is necessary to let grounding wire longer for 2cm than other wires. Inlet electrical cable
of device must not be exchanged by user. In case of cable damage, turn device off and call qualified
workers of authorized service. For the case of exchange of electrical inlet cable, use only the
“HAR H05
VV-F”
3x0,75 mm2 cable with maximum external diameter of 8mm.
Room htermostat a Opentherm (boiler accessory)
ATTENTION: ROOM THERMOSTAT MUST HAVE CLEAN CONTACTS. BY 230V
CONNECTION 230 V TO THERMOSTAT TERMINAL IS ELECTRONICS IRREVERSIBLY
DAMAGED.
It is necessary to connect room thermostat by copper conductor of 1-1,5mm
2
diameter. For the
Opentherm´s contacts it is possible to use copper conductor with diameter of 1-1,5 mm
2
.
Conductors of external temperature sensor must not be lead parallely with conductors of the room
thermostat and mains connection.
External sensor (boiler accessory)
Connect sensor to appropriate terminals.Use casual 2-wire cable. It is necessary to connect room temperature sensor by
copper conductor of
diameter.Maximum ohm resistance of conduction is
0,75 mm2
10k
Ω
, complete length is 30cm.
External probe should be rather installed on northern, north-western side or on side, where the living room is generally
placed. Probe must never be exposed to morning sun. Generally, it must not be exposed to direct sun radiance. If it is
necessary, protect it by cover.
Probe must not be installed near windows, door, ventilation openings, chimneys, nor heat
sources, which could influence measured values.
Summary of Contents for KST
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