BTA User Guide
Topling Prnjavor
Page 17
cold cooling water
to heating system
from heating system
1. boiler
2. three way mixing valve
3. circulation pump
4. shut off valve
5. safety valve
6. ball check valve
7. expansion vesel
8. pipe for charging and discharging
9. thermometer
10.manometer
11.boiler thermal protection
drain
Figure 2a.
(scheme of connecting boiler to the system)
The central heating system, in the vicinity of boiler, must be equipped with
pressure gauge to show the pressure of water in the boiler. (Fig.2a, poz.10)
The central heating system, in the vicinity of boiler, must be equipped with
thermometer to show the temperature of boiler water. (Fig.2a, poz.9)
Softened water is recommended for filling the boiler from the system.
Circulation pump is put into operation only when the heating system is filled with water. What
must be taken into account is that the system is vented.
The central heating system, in the vicinity of boiler, must be equipped with safety
valve to prevent the increasing of water pressure . (Fig.2a, poz.5) . The safety valve must
be set to 2.5 bar.
The safety valve is not supply with the boiler and must be installed in the central
heating system.
Safety valves are used for controlling pressure on boilers in heating systems and generaly
in all systems feeded by water or mixtures of water and vector liquids (glycol, for example). When
calibrated pressure is reached, the valve opens and, by means of the discharge to atmosphere,
prevents the pressure of the system from reaching levels which would be dengerous for the boiler
Summary of Contents for BTA1000
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