Main Water Circuit; Sensors; Expansion Vessel - Sime Brava One 25 OF Manuel Pour L'utilisation, L'installation Et L'entretien

EN
5.6

Main water circuit

1
2
3
4
5
6
8
7
13
M U
KEY:
M System delivery
R System return
U Domestic hot water outlet
E Domesti hot water inlet
S Safety valve outlet
G Gas supply
Smoke thermostat
1
2 Heat exchanger (mono-thermal)
Dual sensor (thermal safety/delivery)
3
Combustion chamber
4
Gas valve
5
Domestic hot water heat exchanger
6
Domestic hot water sensor
7
Diverter valve
8
Automatic bleed valve
9
Pump
10
Domestic hot water flow meter
11
Domestic hot water filter
12
System filling
13
System relief valve
14
Water pressure switch
15
Boiler drain
16
System expansion vessel
17
Water pressure gauge
18
Smoke chamber
19
19
17
18
9 10
15
14 S
11
12
G E R
Fig. 12
5.7

Sensors

The sensors installed have the following characteristics:
– Dual sensor (thermal safety/output) NTC R25°C; 10kΩ β25°-
85°C: 3435
– domestic hot water sensor NTC R25°C; 10kΩ β25°-85°C: 3435
– External temperature sensor NTC R25°C; 10kΩ β25°-85°C:
3435
Correspondence of Temperature Detected/Resistance
Examples of reading:
TR=75°C → R=1925Ω
TR=80°C → R=1669Ω.
TR
0°C 1°C 2°C
0°C 27279 26135 25044
10°C 17959 17245 16563
20°C 12090 11634 11199
30°C 8313 8016 7731
40°C 5828 5630 5440
4161 4026 3897
50°C
60°C 3021 2928 2839
70°C 2229 2164 2101
1669 1622 1577
80°C
90°C 1266 1232 1199
973
100°C
16
5.8

Expansion vessel

The expansion vessel installed on the boilers has the following
characteristics:
Description
Total capacity
Prefilling pressure
Useful capacity
Maximum system content (*)
(*) Conditions of:
Average operating temperature 70°C (with high tempera-
ture system 80/60°C)
Start temperature at system filling 10°C.
m
CAUTION
– For systems with water content exceeding the max-
imum system content (as indicated in the table) an
additional expansion vessel must be prearranged.
– The difference in height between the relief valve
and the highest point of the system cannot exceed
6 metres. If the difference is greater than 6 metres,
increase the prefilling pressure of the expansion
vessel and the system when cold by 0.1 bar for each
meter increase.
3°C 4°C 5°C 6°C 7°C 8°C
24004 23014 22069 21168 20309 19489
15912 15289 14694 14126 13582 13062
10781 10382 9999 9633 9281 8945
7458 7196 6944 6702 6470 6247
5258 5082 4913 4751 4595 4444
3773 3653 3538 3426 3319 3216
2753 2669 2589 2512 2437 2365
2040 1982 1925 1870 1817 1766
1534 1491 1451 1411 1373 1336
1168 1137 1108 1079 1051 1024
Brava One OF
U/M
25
l 8,0
kPa 100
bar 1,0
l 4,0
l 109
9°C
18706
12565
8622
6033
4300
3116
2296
1717
1300
998
53