Gas Control And Thermal Well Testing And Replacement - Bradford White TTW ECO-DEFENDER U1TW40S*FRN Service Manual

Component Disassembly
°F 0
40 26109
50 19906
60 15314
70 11884
80 9299
90 7333
100 5827
110 4663
120 3758
130 3048
140 2488
150 2043
160 1688
170 1402
180 1170
190 982
200 828
Gas Control & Thermal Well Removal From Water Heater
Step 1. Move the gas control power switch to the "OFF" po-
sition.
Step 2. Unplug the water heater from the wall outlet.
Step 3. Drain the water heater to a point below the gas
control level.
Step 4. Turn off the gas supply to the water heater and disconnect the gas piping
from the gas control.
Page 36
36
Sensor Resistance at Various Temperatures
1 2 3
25400 24712 24045
19383 18876 18383
14925 14548 14180
11592 11308 11032
9078 8862 8653
7165 7000 6839
5697 5570 5446
4562 4464 4368
3679 3602 3527
2986 2925 2866
2439 2391 2344
2004 1966 1928
1656 1625 1595
1376 1351 1327
1150 1129 1110
965 949 933
814 801 788
In Degrees F
4 5 6
23399 22771 22163
17905 17440 16990
13823 13477 13140
10763 10502 10248
8449 8250 8057
6683 6531 6383
5326 5208 5094
4274 4183 4094
3453 3382 3312
2808 2752 2697
2298 2253 2209
1891 1856 1820
1566 1537 1509
1303 1280 1257
1090 1071 1053
917 901 886
775 762 749
Gas control power
switch
TTW (water heater)
power cord
7 8 9
21573 21000 20445
16553 16128 15715
12812 12494 12185
10000 9760 9526
7869 7685 7507
6238 6098 5961
4982 4873 4767
4006 3922 3839
3244 3177 3112
2643 2590 2538
2166 2124 2083
1786 1753 1720
1481 1454 1427
1235 1213 1191
1035 1017 999
871 857 842
737 725 713