Component Resistance Characteristics; 13.3.1 Sensor Values - Flow Temperature Sensor; 13.3.2 Sensor Values - Dhw Temperature Sensor; 13.3.3 Sensor Values - Flue Overheat Thermostat - Worcester Greenstar 4000 Installation And Maintenance Instructions Manual

Technical Specifications/Logs
13.3

Component resistance characteristics

The supply sensors (flow temperature sensor at heat exchanger
assembly and flow temperature sensor at flow pipe) share the same
resistance values.
▶ Refer to table 37.

13.3.1 Sensor values - Flow temperature sensor

Temperature [°C ± 10 %]
0
5
10
15
20
25
30
35
40
45
50
55
60
65
70
75
80
85
90
95
Table 37 Flow temperature sensor

13.3.2 Sensor values - DHW temperature sensor

Temperature [°C ± 10 %]
0
5
10
15
20
25
30
35
40
45
50
55
60
65
70
75
80
85
90
95
Table 38 DHW temperature sensor
88
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
918.3
788.5
Resistance [k]
30 400
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
866
741

13.3.3 Sensor values - Flue overheat thermostat

Normally closed thermostat
Opening temperature
Close temperature
Table 39 Flue overheat thermostat

13.3.4 Sensor values - Heat exchanger assembly temperate limiter

Normally closed thermostat
Opening temperature
Close temperature
Table 40 Heat exchanger assembly temperate limiter

13.3.5 Sensor values - Outside temperature sensor

Temperature [°C ± 10 %]
-20
-16
-12
-8
-4
0
4
8
12
16
20
24
Table 41 Outside temperature sensor (for weather-compensated control
units, accessory)
13.4

Code plug

Type Gas type
GR4700iW 30 C Natural gas
GR4700iW 30 C Liquid propane (LPG) 20135
GR4700iW 25 C Natural gas
GR4700iW 25 C Liquid propane (LPG) 30137
Table 42 Code plug
Greenstar 4000 – 6 720 891 161 (2020/09)
Temperature ( °C) Resistance ( )
≥ 112 3500
≤ 111 6500
Temperature ( °C)
≥ 120
≤ 80
Resistance []
2 392
2 088
1 811
1 562
1 342
1 149
984
842
720
616
528
454
Number
20024
20136