7
Start and stop of the
KZT Plus
Boiler without electrical connection
Boiler is not connected to the electricity mains
When the electrical or gas connection is interrupted, the antifreeze system does not work. During
long-time interruption of operation, to avoid of damages caused by frost, it is recommended to release
all water from the boiler, DHW and water from supply system, or to release only DHW and fill the
supply system with antifreeze mixture.
Boiler start
Connect boiler to electricity mains.
The „FH“ letters will be displayed within the following 120 seconds, which means, that the air is
being released form the heating device. During the first 5 seconds is displayed also the card software
version. Open the gas valve installed on the connection with boiler.
The „FH“ text expires, the boiler is prepared for automatic operation everytime by DHW consumption
or by requirement from the room thermostat.
Boiler stop
Hold the button for 1 second (see 9 - Pic.2). When the boiler is shut down, the control electronics
remains connected to electricity. Operation of water warming and heating is turned off. The antifreeze
system remains active. To start the boiler again, hold the button for 1 second again (see 9 - Pic.2).
Boiler will be immediately ready for operation by every DHW consumption or by activation through
the room thermostat.
Indication during heating operation of the
KZT Plus
Requirement for heating (activated by room thermostat or remote control) is indicated by flickering of
the warm air over space heater sign (see 24 and 25 - Pic.2).
Display (See 23 - Pic.2) shows actual temperature at the heating device inlet and the „
d2
“ text during
the period of waiting for heating.
Grades of heating (see 26 - Pic.2) light on sequentially, according to achieving of the value set by
thermal probe.
Domestic hot water
Requirement for water heating in the boiler is indicated by flickering of the warm water sign - marked
as water tap (see 12 and 13 - Pic.2). Display (see 14 - Pic.2) shows actual temperature at the DHW
outlet and the „
d1
“ during waiting for DHW. Grades of the DHW (see 11 - Pic.2) light on
sequentially, according to achieving of the temperature set by the heating device sensor.
Shutdown of the water heater (economy)
Water heating, i.e. keeping water temperature in the storage tank can be shut down. When this
function is turned off, no DHW is produced. When the DHW warming is turned on (original setting),
text „COMFORT“ is diplayed (see15-Pic.2). When it is turned off, text ECO is displayed (“See7-
Pic.2"). For activation of the COMFORT mode, press the button again (See 7 -Pic.2).
