Component Disassembly - Bradford White D4403S*F(BN Service Manual

Residential flue damper
Table of Contents

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Sensor Resistance at Various Temperatures
°F
0
1
40
26109
25400
50
19906
19383
60
15314
14925
70
11884
11592
80
9299
9078
90
7333
7165
100
5827
5697
110
4663
4562
120
3758
3679
130
3048
2986
140
2488
2439
150
2043
2004
160
1688
1656
170
1402
1376
180
1170
1150
190
982
965
200
828
814
Gas Control & Thermal Well Removal From Water Heater
Step 1.
Move the gas control power switch to the "OFF"
position.
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.
In Degrees F
2
3
4
24712
24045
23399
18876
18383
17905
14548
14180
13823
11308
11032
10763
8862
8653
8449
7000
6839
6683
5570
5446
5326
4464
4368
4274
3602
3527
3453
2925
2866
2808
2391
2344
2298
1966
1928
1891
1625
1595
1566
1351
1327
1303
1129
1110
1090
949
933
917
801
788
775
Gas control power
switch
Damper (water
heater) power cord

Component Disassembly

5
6
7
22771
22163
21573
17440
16990
16553
13477
13140
12812
10502
10248
10000
8250
8057
7869
6531
6383
6238
5208
5094
4982
4183
4094
4006
3382
3312
3244
2752
2697
2643
2253
2209
2166
1856
1820
1786
1537
1509
1481
1280
1257
1235
1071
1053
1035
901
886
871
762
749
737
8
9
21000
20445
16128
15715
12494
12185
9760
9526
7685
7507
6098
5961
4873
4767
3922
3839
3177
3112
2590
2538
2124
2083
1753
1720
1454
1427
1213
1191
1017
999
857
842
725
713
Page 23
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