A.O. Smith Boiler NW 37-670 User Manual

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5
APPROVALS
These designs comply with requirements of Underwriters Laboratories
and bear the U.L. label on the cabinet.
All models are built to the standards of Section lV of the American
Society of Mechanical Engineers. Boiler and Pressure Code,
inspected and identified by this symbol.
The ASME plate is located on the tank above the cleanout opening.
When specified, the National Board of Boiler and Pressure Vessel
Inspectors listing will be furnished and identified by an NB number on
the ASME plate.
INSTALLATION CODE REQUIREMENTS
In addition to these instructions, the equipment shall be installed in
accordance with those installation regulations in force in the local
area where the installation is to be made. These shall be carefully
followed in all cases. Authorities having jurisdiction should be
consulted before installations are made.
In absence of local codes the installation must comply with the latest
edition of the National Electrical Code, NFPA 70. Copies of this
document are available from the National Fire Protection Association,
1 Batterymarch Park, Quincy, MA 02269.
GROUNDING
Grounding and electrical wiring connected to the boiler must conform
to the latest edition of the National Electric Code, NFPA 70.
Figure 1, below, is an illustration of a typical model NW/Commercial
Electric Hot Water Boiler with the features called out.
FEATURES
FIGURE 1
FOREWORD

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