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Manual A.O. Smith COBT

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  • A.O. Smith COBT - page 1

    1 W ARNING – PROP ANE MODEL W ater heaters for propane gas are different from natural gas models. A natural gas heater will not function safely on propane gas and no attempt should be made to convert a heater from natural gas to propane gas. Propane gas must be used with great caution. It is highly explosive and heavier than air . It collects fir ...

  • A.O. Smith COBT - page 2

    2 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 ...

  • A.O. Smith COBT - page 3

    3 GENERAL SAFETY INFORMA TION PRECAUTIONS DO NOT USE THIS APPLIANCE IF ANY P ART HAS BEEN UNDERW A TER. Immediately call a qualified service technician to inspect the appliance and to replace any part of the control system and any gas control which has been under water . IF THE UNIT IS EXPOSED TO THE FOLLOWING , DO NOT OPERA TE HEA TER UNTIL ALL CO ...

  • A.O. Smith COBT - page 4

    4 The water temperature is controlled by two thermostats. One thermostat is located near the top of the tank and the other is in the lower part of the tank. The upper thermostat must be set at least 5°F higher than the lower thermostat. In the case where the water heater has electronic thermosta t s, this differential has been factory set and cann ...

  • A.O. Smith COBT - page 5

    5 The latest version of the National Electrical Code, NFP A No. 70. In Canada refer to Canadian Electrical Code C 22.1, from National Fire Protection Association, 1 Batterymarch Park, Quicy , MA 02269-9101. LOCA TING THE HEA TER When inst alling the heater, consideration must be given to proper location. Location selected should be as close to the ...

  • A.O. Smith COBT - page 6

    6 UNDESIRABLE OPENINGS, CAUSING POOR COMBUSTION. SOOTING MA Y RESUL T WITH AN INCREASED RISK OF ASPHYXIA TION. THERMAL EXP ANSION (CLOSED SYSTEM) Thermal expansion occurs in any hot water system when system water is heated or “recovered” during periods of non-use. If the system is operated in an “open” condition such as being connected dire ...

  • A.O. Smith COBT - page 7

    7 Where an existing chimney or vent is to be used, be sure that the chimney or vent has adequate capacity for the number and sizes of gas appliances being vented through it. Inspect the chimney or vent and remove all soot or other obstructions, which will retard free draft. V ent piping making horizontal runs must have a minimum upward slope toward ...

  • A.O. Smith COBT - page 8

    8 T ABLE 3 EQUIV ALENT LENGTH OF FITTINGS IN FEET Pipe Size (IPS) 1 1.25 1.5 2 2. 5 3 4 S td. T ee through side 5.5 7.5 9 .0 12.0 14.0 17.0 22.0 S td. E1 1 2.7 3 .7 4.3 5.5 6.5 8.0 12.0 45°F E1 1 1.2 1.6 2.0 2.5 3.0 3.7 5.0 Plug Cock 3.0 4.0 5.5 7.5 9.0 12.0 16.0 W ARNING THE HEA TER IS NOT INTENDED FOR OPERA TION A T HIGHER THAN 13.8” W A TER C ...

  • A.O. Smith COBT - page 9

    9 TYPICAL WIRE DIAGRAM BTP , 270 - 2,500 KBTUH COF , 800 - 2,500 KBTUH COBT , 400 - 2,500 KBTUH TYPICAL WIRE DIAGRAM BTP , 140 - 255 KBTUH ...

  • A.O. Smith COBT - page 10

    10 TYPICAL WIRE DIAGRAM COF , 140 - 720 KBTUH TYPICAL WIRE DIAGRAM COBT , 140 - 300 KBTUH ...

  • A.O. Smith COBT - page 11

    11 OF ELECTRICAL SHOCK. DO NOT ENERGIZE THE BRANCH CIRCUIT BEFORE THE HEA TER T ANK IS FILLED WITH W A TER. TWO UNIT MANIFOLD INST ALLA TION Assure water flow balance of all units. Without this balance, the full water heating and storage potential of the system cannot be achieved. Otherwise, the units with the higher water flow may have a shortened ...

  • A.O. Smith COBT - page 12

    12 3. The correct test instruments are: •C O 2 indicator or 0 2 analyzer • CO indicator • Stack thermometer • Draft gauge or inclined manometer • U-tube manometer or calibrated 0-10” and 0-35” w . c. pressure gauge • Combination volt/ammeter . Suggested safety device test procedures are: A. While heater is operating, turn valve, mai ...

  • A.O. Smith COBT - page 13

    13 Lime accumulation not only reduces the life of the equipment but also reduces efficiency of the heater and increases fuel consumption. The usage of water softening equipment greatly reduces the hardness of the water . However , this equipment does not always remove all of the hardness (lime). For this reason it is recommended that a regular sche ...

  • A.O. Smith COBT - page 14

    14 BURNER AIR OPENINGS OR VENTILA TION GRILLES FOR COMBUSTION AIR. REMOVE LINT ACCUMULA TION FROM AIR INT AKE GRILL. At least annually , contact a qualified service agency for burner cleaning and other routine maintenance. CLEANING FLUES-COF & COBT ONL Y The following describes how to gain access to the tank flues for cleaning if necessary . 1. ...

  • A.O. Smith COBT - page 15

    15 W A TER HEA TER MAKES NOISE 1. Sediment or lime scale accumulations cause noises when the heater is operating. • The sounds are normal, however , the tank bottom should be cleaned. Refer to MAINTENANCE for details. 2. Some of the electrical components of the water heater make sounds, which are normal. • Contacts click or snap as the heater s ...

  • A.O. Smith COBT - page 16

    16 CERTIFIED F ACTOR Y ST ART - UP REQUIRED T o activate your warranty , contact your local sales represent ative or Authorized S tart-up Agent to arrange for a FREE Certified S tart-up. A.O. Smith Corporation, the warrantor, extends the following LIMITED W ARRANTY to the owner of this water heater. 1. THE T ANK If the glass lined tank in this wate ...

Manufacturer A.O. Smith Category Water Heater

Documents that we receive from a manufacturer of a A.O. Smith COBT can be divided into several groups. They are, among others:
- A.O. Smith technical drawings
- COBT manuals
- A.O. Smith product data sheets
- information booklets
- or energy labels A.O. Smith COBT
All of them are important, but the most important information from the point of view of use of the device are in the user manual A.O. Smith COBT.

A group of documents referred to as user manuals is also divided into more specific types, such as: Installation manuals A.O. Smith COBT, service manual, brief instructions and user manuals A.O. Smith COBT. Depending on your needs, you should look for the document you need. In our website you can view the most popular manual of the product A.O. Smith COBT.

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A complete manual for the device A.O. Smith COBT, how should it look like?
A manual, also referred to as a user manual, or simply "instructions" is a technical document designed to assist in the use A.O. Smith COBT by users. Manuals are usually written by a technical writer, but in a language understandable to all users of A.O. Smith COBT.

A complete A.O. Smith manual, should contain several basic components. Some of them are less important, such as: cover / title page or copyright page. However, the remaining part should provide us with information that is important from the point of view of the user.

1. Preface and tips on how to use the manual A.O. Smith COBT - At the beginning of each manual we should find clues about how to use the guidelines. It should include information about the location of the Contents of the A.O. Smith COBT, FAQ or common problems, i.e. places that are most often searched by users in each manual
2. Contents - index of all tips concerning the A.O. Smith COBT, that we can find in the current document
3. Tips how to use the basic functions of the device A.O. Smith COBT - which should help us in our first steps of using A.O. Smith COBT
4. Troubleshooting - systematic sequence of activities that will help us diagnose and subsequently solve the most important problems with A.O. Smith COBT
5. FAQ - Frequently Asked Questions
6. Contact detailsInformation about where to look for contact to the manufacturer/service of A.O. Smith COBT in a specific country, if it was not possible to solve the problem on our own.

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