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A.O. Smith Manuals
Water Heater
Water Heater 520 Direct Vent Indoor
Service manual
Wiring Diagram - A.O. Smith Water Heater 520 Direct Vent Indoor Service Manual
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CONFIDENTIAL
520 Indoor / 520 Outdoor Service Manual
Ver. 1.00
6. Wiring diagram
The diagram below refers to both the 520 Indoor and 520 Outdoor.
D2
D1
F
9007603005
H1
H2
E2
E3
J
E1
K1
K2
C
I
B1
B2
C1
G1
A
C2
G2
A2
A1
11
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Chapters
Table of Contents
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Component Specifications
17
12. Controls and Settings
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Table of Contents
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This manual is also suitable for:
Water heater 520 outdoor
520 direct vent indoor
520 outdoor
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