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H4EKO-D
The flue path piping mounted on the boiler must be firmly assembled and mounted to prevent accidental or spontaneous release.
We recommend that the flue from the boiler to the chimney is no longer than 1 m and that it rises towards the chimney;
recommended slope of at least 5% (3°). The connection is recommended to be direct – no more than one bend.
The boiler and flue must comply with the fire regulations ČSN 06 1008:1997 (Fire safety of heating equipment), ČSN EN 13501-
1:2007 (Fire classification of construction products and building elements – Part 1: Classification using data from reaction to fire
tests) and may be installed at a safe distance of 400 mm from flammable materials. The safe distance must also be observed when
the flammability class of a flammable substance is not proved.
8. COOLING LOOP ASSEMBLY
The H4xx EKO-D boiler is in accordance with the requirements of ČSN EN 303-5:2013 and Government Decree No 26/2003 Coll.,
equipped with a safety heat exchanger to remove excess heat, which must ensure that the maximum water temperature in the
boiler, i.e., 110 °C, is not exceeded. This safety heat exchanger is designed to be controlled at the inlet by a safety drain valve. This
valve can be ordered from us at any time so that the installation on the cooling loop is as simple as possible.
Operation principle
Insert the safety valve sensor into the sink on the upper side of the boiler. The sensor reads the boiler water temperature. If the
boiler water temperature increases to 95°C (TS 130), the boiler automatically opens and discharges water into the built-in heat
exchanger to remove heat and prevent the boiler from overheating. After the boiler's water has cooled down, the valve
automatically closes until it stops the cold water inflow to the safety heat exchanger. This activity can be repeated several times,
depending on the amount of fuel in the filling shaft or on the duration of reduced heat consumption through the heating system.
•
The drain relief valve must always be connected to the water inlet to the
cooling loop so that the cooling loop is not under constant service water
pressure
•
If the recommended cooling loop connection to the boiler in accordance
with the operating instructions is not adhered to, the cooling loop may be
pressurised and consequently cause leaks.
•
For the valve's correct operation, it must be ensured that the valve is
connected to a permanent cooling water source of at least 2 bar
(preferably a public water supply) at a temperature of around 15°C
•
Check the correct valve function annually at minimum
10. ELECTRICAL DIAGRAM
9
Instructions
Valve temperature
sensor
Input
Output
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