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Selection and way of connection of regulation and control elements
Boiler is delivered with basic regulation and control equipment. Connection of these elements is
given on connection scheme. It is recommended to extended boiler regulation for next regulation
elements for more comfortable and economical operation. Every pump in the system must be
controlled by individual thermostat to prevent boiler undercooling at the return water inlet (return
connection) under 65°C.
Connection of these elements is proposed by projectant, following specifical conditions of heating
system. Electrical installation in combination with sufficient boiler equipment must be done by
specialist under the valid norms.
Connection to electricity mains
Boiler is connected to el. mains 230 V / 50 Hz by plug with fork. Plug of M type has to be replaced
by service technician with the same type of plug. Appliance must be placed in the way enabling
attendance to reach the connection fork (under the STN EN 60335-1+A11:1997). Connection of el.
socket must be in conformity with the STN 33 2000-4-46 norm. Socket must be equipped with
middle protection stick, connected to the PE conductor. It is not permitted to use different cable
distributors and extensions. Due to safety, power inlet must be freely accessible, when being
connected to the el. mains.
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