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A and B. Heating circuit supply connections (optional). Hot water outlet.
C. Exhaust output.
D. Drain hole.
E. Return water connection. Cold/cooling water inflow.
DANGER: Injury and/or damage to the system due to overheating!
The boiler can operate only with an active thermal outflow protection and/or safety heat
exchanger.
Always ensure that cooling water is supplied to the thermal outflow protection and safety heat
exchanger to maintain the required water pressure.
Inform the user about the operation of the thermal outflow protection and safety heat
exchanger.
DANGER: Danger to health due to contamination of usable water!
Ensure compliance with national regulations and standards on the prevention of usable water
contamination (e.g. water from heating systems).
Ensure compliance with EN 1717.
Put a filter in the cooling water inlet, in front of the thermostatic valve.
Do not place mountings allowing for the total or partial closure of the flow or devices and
mountings reducing the internal cross-section on safety pipes, expansion pipe, overflow pipe and
venting pipe.
INFO: The minimum capacity of the expansion vessel is calculated according to the formula [1] - PN-91/B-
02413 p. 2.5.1.
INFO: Equipment and placement of the expansion vessel is determined by PN-91/B-02413 p. 2.5.2.÷2.5.4.
Expansion vessel, safety pipes, expansion pipe, signal pipe and overflow pipe must be at a place where the
air temperature is not lower than 0 ° C.
INFO: If the expansion vessel is at a place where the air temperature drops below 0°C, use circulation
pipes and safety pipes connecting the expansion vessel with the boiler, as well as thermal insulation
according to PN-91/B-02413 p. 2.11. Thermal insulation of safety devices is to protect them against
freezing only during short interruptions of heating.
NOTE! – The lack of thermal insulation and placing the expansion vessel not in accordance with PN-91/B-
02413 identified during warranty claims for leaks during temperature drops below 0°C
can be grounds for not accepting the complaint and refusing to repair or replace the boiler.
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