Main Water Circuit; Sensors; Expansion Vessel - Sime BRAVA ONE HE 25 Manual De Instalación Y Mantenimiento

EN
1.6

Main water circuit

1
2
3
4
6
5
11
12
13
19
20
Sc 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
Sc Condensate outlet
Condensing heat exchanger
1
Combustion chamber
2
Ventilator
3
4 Thermal safety thermostat
Delivery sensor
5
Domestic hot water heat exchanger
6
Water pressure switch
7
Automatic bleed valve
8
Pump
9
System expansion vessel
10
Diverter valve
11
12 Automatic by-pass
Domestic hot water sensor
13
Gas valve
14
Domestic hot water flow meter
15
Domestic hot water filter
16
Boiler drain
17
System relief valve
18
System filling
19
20 Condensate siphon outlet
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10
8 9
7
17
15
14
18
16
G E R S
Fig. 3
1.7

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 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 3°C 4°C
0°C 27279 26135 25044 24004 23014
10°C 17959 17245 16563 15912 15289
20°C 12090 11634 11199 10781 10382
30°C 8313 8016 7731 7458 7196
5828 5630 5440 5258 5082
40°C
4161 4026 3897 3773 3653
50°C
60°C 3021 2928 2839 2753 2669
70°C 2229 2164 2101 2040 1982
80°C 1669 1622 1577 1534 1491
90°C 1266 1232 1199 1168 1137
100°C 973
1.8

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 maximum temperature of the system 85°C
Start temperature at system filling 10°C.
m
CAUTION
– For systems with water content exceeding the ma-
ximum system content (as indicated in the table)
an additional expansion vessel must be prearran-
ged.
– 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 me-
tres, increase the prefilling pressure of the expan-
sion vessel and the system when cold by 0.1 bar
for each meter increase.
5°C 6°C 7°C 8°C 9°C
22069 21168 20309 19489 18706
14694 14126 13582 13062 12565
9999 9633 9281 8945 8622
6944 6702 6470 6247 6033
4913 4751 4595 4444 4300
3538 3426 3319 3216 3116
2589 2512 2437 2365 2296
1925 1870 1817 1766 1717
1451 1411 1373 1336 1300
1108 1079 1051 1024 998
Brava One HE
U/M
25 30
l 9,0
kPa 100
bar 1,0
l 5,0
l 124
59