- 13 -
KALVIS-4 (N) EN 2019.01.14
5.3. Connection to the heating system
Requirements for connection (see fig. 6a, 6b):
Recommended connection design options:
Fig. 6a: open type heating system; fig. 6b: closed type heating system.
1. Boiler. 2. Thermomanometer *. 3. Open expansion vessel. 4. Protective valve.
5. Thermometer. 6. Expansion vessel. 7. Boiler. 8. Coils 9. Quadruple mixing valve. 10. Water
filter. 11. Pump. 12. Emergency cooling valve. 13. Filling-discharge pipe.
* Boiler is completed with thermomanometer, with accurateness and response time in line with
its measuring functions.
Requirements for connection:
• The boiler must be connected to the heating system according to a project
prepared by the heat engineering technicians or the work can be carried out
independently by a highly skilled plumber, experienced in the work and
well-familiar with this description.
• Connect the boiler to heating and return pipes with a diameter of at least
1½ in.
• When connecting the boiler to an enclosed heating system with a
membrane expansion vessel, its permissible pressure can be up to 10 bar,
the air pressure must be equal to the pressure in the system, e.g. 0.6 bar.
An open-ended expansion tank can be fitted in place of the membrane
expansion vessel when developing an open-type heating system.
• A safety valve (G½B) must be fitted into the system as close to the boiler
as possible, protecting the boiler housing from pressures greater than
1.5 bar (0.15 MPa). There must be no closing valves between the boiler
and the safety valve.
• If the system has valves disconnecting the boiler from heating
system installed, they must be fully open. On order to avoid a mishap,
after opening the valves, remove their handles to safe place.
To Next Page
Loading...