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Sirijus 20, 30
Sirijus 20, 30
Sirijus 20, 30 (13.05) V1 LT Sirijus 20, 30 (13.05) V1 LT
5.4. CONNECTION TO THE BOILER COOLING SYSTEM
For protection of the boiler against overheating, the system must be equipped with a
thermostatic cooling valve. We recommend to install the thermostatic cooling valve "Regulus"
DBV-1 (Czech Republic). The valve must be installed in accordance with the manufacturer's
description.
Technical data of the valve “Regulus” DBV-1:
Opening temperature:
100 °C (+0°C -5 °C)
Maximal temperature:
120 °C
Maximal pressure of the boiler
4bar
Maximal pressure of the cold water system
6bar
Nominal water discharge
at the pressure difference of 1 bar
1,8m3 /hr at 110°C
This valve should be installed as close to the boiler water conduit pos. 20 as possible
(see Picture 1). It can be mounted in a vertical or horizontal position. The valve must not be
mounted with a valve head downward (see Picture 3).
Forbidden Position
Picture 3
Mounting positions of the thermostatic cooling valve “Regulus” DBV-1
A valve tube “A” (see Picture 4) is connected to the cold water conduit; pressure in the
system should not exceed 6 bar, though, pressure in the cold water system should be
approximately 2 times greater than in the heating system, but at least 2 bar. A val
ve tube “B” must
be connected to the return water pipe of the boiler pos. 19 (see Picture 1). This way of the cold
water supply into the system will cool the boiler and avoid overheating of the boiler. Excessive
system pressure is removed through the valve
tube “C”, so, that the tube must be connected to
the drainage. Minimal diameter of connecting valve pipes is DN16.