Component Resistance Characteristics; 13.2.1 Sensor Values; Heating Curve - Bosch Worcester 2000 Series Installation And Maintenance Instructions Manual

Worcester 2000
Description
Lift weight (without front panel)
SEDBUK 2009
1) For minimum and maximum permissable pressure refer to "Gas pressure within the system", section 6.6.
2) The Gas Rate provided assumes the accepted NG averaged calorific value of 34-9 MJ/m
3) Appliances are fitted with a flow regulator set to achieve a 35°C temperature rise. A 40°C temperature rise is possible at lower flow rates.
4) Protection rating may change depending on the control unit/s used on this appliance.
Table 34 Technical data Worcester 2000
13.2

Component resistance characteristics

13.2.1 Sensor values

Temperature [°C ± 10%]
0
5
10
15
20
25
30
35
40
45
50
55
60
65
70
75
80
85
90
95
100
Table 35 Flow temperature sensor
Temperature [°C]
0
10
20
30
40
50
60
70
80
90
Table 36 DHW temperature sensor
Worcester 2000 – 6 721 814 551 (2019/09)
Resistance []
33 404
25 902
20 247
15 950
12 657
10 115
8 138
6 589
5 367
4 398
3 624
3 002
2 500
2 092
1 759
1 486
1 260
1 074
918
788
680
Resistance []
33 242
19 947
12 394
7 947
5 242
3 548
2 459
1 740
1 256
923
Unit
kg
%
3
net.
Temperature [°C]
-40
-30
-20
-10
0
10
20
30
40
50
Table 37 Outside temperature sensor (for weather-compensated
controllers, accessory)
13.3

Heating curve

VT/°C
max
pA
S
B
pB
+20
Fig. 94 Heating curve
A End point (at the outside temperature – 10 °C)
AT Outdoor ambient temperature
B Base point (at the outside temperature + 20 °C)
max Maximum flow temperature
pA Flow temperature at the end point of the heating curve
pB Flow temperature at the foot point of the heating curve
S Automatic heating switch-off (summer mode)
VT Supply temperature
Technical Specifications/Logs
7 736 902 027 7 736 902 028
25kW N.G. 30kW N.G.
33.4 33.4
89.1 89.1
Resistance []
≥ 4 111
3 218
2 360
1 650
1 122
759
515
354
247
≤ 174
A
-10
AT/°C
0 010 005 905-001
75