National Products BW3 User Manual

Installation, start-up, and operating instructions

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NOTE:

Read the entire instruction manual before starting the installation. These instructions must be affixed on or adjacent to the boiler.

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Index

Page

SAFETY CONSIDERATIONS.....................................................................................................................................................................................2
INTRODUCTION..........................................................................................................................................................................................................3
BOILER RATINGS AND CAPACITIES .................................................................................................................................................................3-4
LOCATING THE BOILER .......................................................................................................................................................................................4-5
FRESH AIR FOR COMBUSTION...........................................................................................................................................................................5-6

Boiler Located in Unconfined Space.......................................................................................................................................................................5
Boiler Located in Confined Space .......................................................................................................................................................................5-6

INSTALLATION—SYSTEM PIPING .....................................................................................................................................................................6-7

For Use with Cooling Units.....................................................................................................................................................................................7
Low Design Water Temperature Systems (Below 140°F) .....................................................................................................................................7

®

CANADIAN GAS ASSOCIATION

A PP R O VED

R

ama

ASME

®

A95465

MODEL BW3

Installation, Start-Up, and Operating Instructions

BW3

Series B

Gas-Fired
Induced-Draft Hot Water Boilers
Sizes 42,500 through 225,000

Form:

IM-BW3A-05

Cancels:

IM-BW3A-04

Printed in U.S.A.

8-99

Catalog No.

63BW-3A1

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