40
4.5.9
Loading the system
Once all boiler connections have been completed, CH system can be filled.
This procedure is to be cautiously carried out, following each below indicated step:
- Open the air purging valves on all radiators and verify the boiler automatic valve operation.
- Gradually open the filling loop to fill the system up, checking that all automatic air purging valves installed in the system properly work.
- Close all radiator air purging valves as soon as water starts coming out.
- Check boiler water pressure gauge for pressure to reach 1-1.3 bars reading.
- Shut the filling loop and bleed any air out again by opening all air purging valves on radiators.
- Start the boiler and, as soon as the system reaches working temperature, stop the boiler and pump and repeat the air purging procedures.
- Allow the system to cool and restore water pressure to 1-1.3 bars.
WARNING
As far as domestic heating systems treatment of water is concerned, in order to optimize performance and safety, to preserve
these conditions over time, to ensure long-lasting regular operation of auxiliary equipment as well, and to minimize energy
consumption, thereby integrating current local laws and standards it is advisable to use specific products that are suitable for
multi-metal plants.
WARNING
The safety fluid flow meter will not allow the burner to be started when CH water flow is too low. CH system water pressure is
not to be below 1 bar; restore proper value as needed via the filling loop. The procedure is to be carried out while water in the
system is cold.
Boiler pressure gauge displays water pressure in the CH system.
WARNING
After long boiler inactivity, its pump may be stuck. Before operating the boiler, follow the below indicated pump clearing proce-
dure:
- unscrew the protective bolt, located in the center front section of pump motor;
- put a screwdriver into the opening and manually rotate the circulation unit shaft clockwise;
- once the pump is reliased, screw back on the protection bolt and check for water leaks.
When the pump protective bolt is removed, some water may flow out. Before re-installing the boiler external housing, verify all
internal surfaces to be dry.
pic. 28
100
90
80
70
60
50
40
30
20
10
0
20
16
12
8
4
0
-4
-8
-12
-16
-20
-24
-28
-32
-36
-40
3.0 2.5
2.0
1.5
1.0
0.8
0.6
0.4
0,2
Outdoor temperature [ °C]
Flow temperature [ °C]
Summary of Contents for Tahiti Condensing 24 kW Combi (KC)
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