FOREWORD

This manual is intended to be used in conjunction with other literature provided with the heater. This includes power burner and related gas control information. It is important that this manual and the additional publications be reviewed in their entirety before beginning any work.

The installation should be made in accordance with the regulations of the local code authorities and utility companies, which pertain to this type of water heating equipment.

MAKE SURE the fuel on which the heater will operate is the same as that specified on the heater model and rating plate.

THESE HEATERS MUST NOT BE INSTALLED ON COMBUSTIBLE FLOORS.

Instructions for periodic testing of various water heater safety devices are included in section titled COMBUSTION

ARRANGEMENT REQUIREMENTS AND SERVICE RECOMMENDATIONS.

In the absence of local codes, the installation must comply with the instruction as outlined in the latest publication of ANSI booklet NFPA-54/ANSI Z223.1 “NATIONAL FUEL GAS CODE”, NFPA No. 70 “NATIONAL ELECTRICAL CODE”, or Canadian Gas Association booklet CAN 1-B149.1 or CAN 1-B149.2 for Canadian Installations also be followed.

These manuals can be purchased from the American Gas Association Laboratories, 8501 East Pleasant Valley Road, Cleveland, OH 44131 or the National Fire Protection Association, 1 Batterymarch Park, Quincy, MA 02269-9101, or Canadian Gas Association Labortories, 55 Scarsdale Road, Don Mills, Ontario, Canada M3B 2R3.

TABLE OF CONTENTS

 

PAGE

 

PAGE

FOREWORD

2

Gas Piping

7-8

IDENTIFICATION

2

Purging

8

GENERAL SAFETY INFORMATION

3

Gas Meter Size (City Gases Only)

8

Precautions

3

Gas Pressure Regulator

8

Grounding Instructions

3

Wiring

8-11

Improper Combustion

3

TWO UNIT MANIFOLD INSTALLATION

11

Liquid Petroleum Models

3

OPERATION

11

Extended Non-Use Periods (BTP Models Only)

3

Important

11

Insulation Blankets

3

General

11

High Altitude Installations

3-4

Filling

11

FEATURES

4

Combustion Arrangement Requirements

 

Water Temperature Control

4

And Service Recommendations

11-12

INSTALLATION INSTRUCTIONS

4

MAINTENANCE

12

Required Ability

4

General

12

Uncrating

4-5

Flushing

12

Locating the Heater

5

Draining

12

Leveling

5

Sediment Removal

12

Clearances

5

Lime Scale Removal

12-13

Air Requirements

5-6

Relief Valve

13

Thermal Expansion (Closed System)

6

Power Burner

13-14

Venting

6

Cleaning Flues - COF & COBT Only

14

Vent Connector

6

Vent Systems

14

Barometric Draft Control Assembly

6-7

Barometric Draft Control

14

Water Line Connections

7

TROUBLESHOOTING

14-15

Thermometers (Not Supplied)

7

Replacement Parts

15

Relief Valve

7

LIMITED WARRANTY

16

This manual is supplemented by the power burner manual. All information, including start-up and

maintenance relating to the burner, can be found in that manual.

IDENTIFICATION

The heater and burner mounted identification plates provide valuable information. When ordering parts or inquiring about a unit, be sure to include serial number, model number and type of fuel.

2

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A.O. Smith BTPN, COF, COBT, BTP-140-140 thru 600-2500 warranty Foreword, Table of Contents, Identification

BTP-140-140, BTPN, BTP-140-140 thru 600-2500, COF, COBT specifications

A.O. Smith, a renowned leader in water heating technology, offers a range of high-efficiency commercial boilers, including the COBT, BTP-140-140 through BTP-600-2500, BTPN, and COF models. Designed to cater to diverse heating needs, these systems are engineered for optimal performance, reliability, and efficiency, making them ideal for various applications, from hospitality to industrial processes.

The A.O. Smith COBT model stands out for its innovative features, such as a fully modulating burner that adjusts output based on demand, enhancing energy efficiency and ensuring consistent comfort. Its compact design allows for easy installation in limited spaces, while robust construction materials ensure longevity. The integrated controls offer real-time monitoring and diagnostics, allowing operators to maintain peak performance and reduce maintenance costs.

The BTP series, particularly the BTP-140-140 through BTP-600-2500, delivers high heating capabilities with a range of output options. These models feature a sophisticated heat exchanger design that maximizes heat transfer efficiency while minimizing energy consumption. The use of dual-fuel capability provides flexibility, allowing users to switch between natural gas and propane, thus enhancing operational resilience. The BTP units are also equipped with advanced modulating burners that adapt to varying load conditions, further optimizing fuel usage.

For applications requiring enhanced performance, the BTPN models offer additional features like integrated pumps and a larger footprint for increased capacity. This makes them ideally suited for high-demand environments where consistent hot water supply is critical. The COF model complements this lineup, focusing on oil-fired applications and delivering reliability across diverse operating conditions.

In terms of technology, A.O. Smith utilizes cutting-edge combustion systems and advanced control technologies that not only enhance efficiency but also meet stringent emission standards. The incorporation of condensing technology in many models enables users to harness latent heat from flue gases, significantly improving overall system efficiency.

Overall, A.O. Smith's COBT, BTP, BTPN, and COF models are engineered with a commitment to quality, efficiency, and user-friendliness. Their reliability, advanced technologies, and versatile applications make them a preferred choice for businesses looking for durable and efficient heating solutions. Whether for commercial or industrial needs, A.O. Smith continues to set the standard for water heating systems.