Bosch TRONIC 5000C Pro Installation Manual And Operating Instructions page 21

Pro tankless electric water heaters
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Using an ohmmeter to check for premature element failure
On WH17 model, there is no middle element
Fig. 12 Heating elements
Meter probes
Outer to Outer
Middle to Middle
Inner to Inner
Tab. 8
Copyright
Ohm Readings
10.5 ± 0.6 Ohms
11.7 ± 0.8 Ohms
15.1 ± 1 Ohms
Meter probes
Outer to Outer
Middle to Middle
Inner to Inner
Tab. 9
Maintenance | 21
Ohm Readings
10.5 ± 0.6 Ohms
11.7 ± 0.8 Ohms
21.0 ± 1.2 Ohms
6 720 646 951 (2011/09)

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