Bradford-White Corp TTW ECO-DEFENDER UTW450S60FR*N Manual De Usuario
Page 36
Sensor Resistance at Various Temperatures
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.
Step 4.
Turn off the gas supply to the water heater and disconnect the gas piping
from the gas control.
Component Disassembly
°F
0
1
2
3
4
5
6
7
8
9
40
26109
25400
24712
24045
23399
22771
22163
21573
21000
20445
50
19906
19383
18876
18383
17905
17440
16990
16553
16128
15715
60
15314
14925
14548
14180
13823
13477
13140
12812
12494
12185
70
11884
11592
11308
11032
10763
10502
10248
10000
9760
9526
80
9299
9078
8862
8653
8449
8250
8057
7869
7685
7507
90
7333
7165
7000
6839
6683
6531
6383
6238
6098
5961
100
5827
5697
5570
5446
5326
5208
5094
4982
4873
4767
110
4663
4562
4464
4368
4274
4183
4094
4006
3922
3839
120
3758
3679
3602
3527
3453
3382
3312
3244
3177
3112
130
3048
2986
2925
2866
2808
2752
2697
2643
2590
2538
140
2488
2439
2391
2344
2298
2253
2209
2166
2124
2083
150
2043
2004
1966
1928
1891
1856
1820
1786
1753
1720
160
1688
1656
1625
1595
1566
1537
1509
1481
1454
1427
170
1402
1376
1351
1327
1303
1280
1257
1235
1213
1191
180
1170
1150
1129
1110
1090
1071
1053
1035
1017
999
190
982
965
949
933
917
901
886
871
857
842
200
828
814
801
788
775
762
749
737
725
713
In Degrees F
Gas control power
switch
TTW (water heater)
power cord
36