Bedienungsanleitung Atmos A25 (Seite 61 von 96) (Englisch)

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Operation and maintenance manual - EN

www.atmos.cz EN-61

• Parameter S16 - Temperature of the top sensor (TV) at which the burner is started….. (60 °C)

It is the minimum temperature of water that can be reasonably utilized in the heating system.

• Parameter S17 - The temperature of the bottom sensor ((TS, or TK for S15 = 3)) at which the

burner is stopped….. (75 °C)

It is the maximum temperature of water that corresponds to requirements of the heated building

and the designed heat exchangers in the system (radiators and floor heating).

CAUTION – Do not set this value too high to avoid disconnection of the safety thermostat on

the boiler. Always set the control thermostat on the boiler to the maximum value (95 °C). If

the control thermostat on the boiler intervenes before the burner is switched off by the signal of

the TS sensor in the bottom part of the accumulation tank, the system probably finds itself in the

state of hydraulic imbalance and you should check and adjust it. You can e.g. throttle the shortcut

in the boiler circuit or the return line from the heating system towards the accumulation tank.

• Parameter S18 – describes the required temperature of boiler TK, which the burner is switched

off at if S15 = 4… (85 °C)

• Parameter S19

- difference between TK temperature (for re-starting the burner) for S15 = 4…(5 K)

• Parameter S24 – maximum flue gas temperature... (250 °C)

If you connect a flue gas temperature sensor (TS) to the burner and in a mode of the burner this

limit value is exceeded, a warning message will appear on the display. It will notify the operator of the

necessity to clean the heat exchanger of the boiler or the installer of the necessity to reduce the burner

power to avoid unnecessary wasting of fuel. The operation of the burner is not limited by this

message in any way and to clear the message you can just switch off and on the main switch on the

boiler.

•

Parameter S26

– is the function for defining the logic of deactivating the burner based on the TS or

TK sensor, when S15 = 3. Connection of the boiler with a tank equipped with a solar exchanger… (1)

a) S26 = 0…. The burner permanently works based on the upper TV sensor (activation temperature)

and via the TK sensor (deactivation temperature). The lower part of the tank permanently has

enough room for energy from the solar collector (TS sensor)

b) S26=1… the burner permanently works based on the upper TV sensor (activation temperature)

and the configured logic automatically takes care of switching between the middle TK sensor and

lower TS sensor. Whether the burner is deactivated based on TS or TK is decided based on the

temperature on the solar panel (TSV) and the temperature on the lower part of the accumulation

tank (TS), where the solar exchanger is located. If the solar panel can efficiently heat up water in

the accumulation tank, the burner is turned off based on the TK sensor, so that the tank can store

energy from the sun.

• Parameter S17 - activation difference of function S26 = 1… (10 K)

If the temperature on the solar panel (TSV) exceeds the temperature in the lower part of the tank

by the activation difference, the boiler deactivation function will be switched from the bottom TS

sensor to the middle TK sensor.

If a function for solar panel pump control is activated directly from the boiler regulation (S6 = 14

or S14=4), the same logic will be used to activate the solar pump.

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