English dropdown-ico

Manual A.O. Smith 750 SERIES

24 pages 0.32 mb
Download

Go to site of 24

Summary
  • A.O. Smith 750 SERIES - page 1

    1 A DIVISION OF A. O. SMITH CORPORA TION MC BEE, SC., RENTON, WA., STRA TFORD-ONT ARIO, VELDHOVEN-THE NETHERLANDS w w w .hotwater .com GAS-FIRED COMMERCIAL COPPER BOILERS FOR HYDRONIC HEA TING AND HOT W A TER SUPPL Y USER'S INFORMA TION MANUAL GB/GW-300, 400, 500, 650, 750 SERIES 400, 401, 402, 403, 404, 405, 2-ST AGE UNITS W ARNING Should ove ...

  • A.O. Smith 750 SERIES - page 2

    2 Lighting Instructions for the G(B/W) 300 through 750 models THE UNIT SHOULD NOT BE INST ALLED DIRECTLY ON A CARPETED FLOOR. A FIRE HAZARD MA Y RESUL T . Instead, the boiler must be installed on the A. O. Smith Combustible Floor Kit Base or concrete blocks extending beyond the full width and depth of the boiler by at least 3 (76.2mm) inches. If th ...

  • A.O. Smith 750 SERIES - page 3

    3 LIGHTING INSTRUCTIONS These models have an automatic hot surface ignition system mounted on the combustion chamber panel inside the front jacket. This hot surface igniter ignites the main burner gas whenever the system control calls for heat. Before proceeding with operation of the unit, make sure the boiler and system are filled with water and a ...

  • A.O. Smith 750 SERIES - page 4

    4 the surrounding air pressure. Inspection of the boiler and vent system is necessary to insure that flue gas leakage to the surrounding area does not occur . Inspect the external surfaces of the vent system every 3 months for corrosion and leakage. Inspect the vent terminations for corrosion and foreign matter which may be blocking the exhausting ...

  • A.O. Smith 750 SERIES - page 5

    5 Figure 1A. CCB (Drawing #211758) ...

  • A.O. Smith 750 SERIES - page 6

    6 Figure 1B. FCB (Drawing #211759) ...

  • A.O. Smith 750 SERIES - page 7

    7 Figure 1C. PDB (Drawing #211760) ...

  • A.O. Smith 750 SERIES - page 8

    8 closed and everything else is in the proper state, a "call for heat" condition will be initiated. These leads should be shorted together, when a thermostat is not being used. If it is desired that the thermostat control the temperature of the boiler , the operating setpoint of the system should be set higher than the temperature that th ...

  • A.O. Smith 750 SERIES - page 9

    9 CCB - Three position Dipswitch (Flame Control Section): This dipswitch is similar to the FCB dipswitches described below , but with only three switches being used: the number of blower speeds (switch #3), Hi Gas option (switch #2) and a spare (switch #1). Only the blower speed selection and Hi Gas are required because FCB1 always has a blower , i ...

  • A.O. Smith 750 SERIES - page 10

    10 • S tored values are recalled from memory . • Configuration dipswitches are read. • Pending faults are recalled • Micros on all boards start running (indicated by a flashing Y ellow LED near each micro) • Input sensors are read • Communications between micros and boards is established • FCB's are configurated with the number o ...

  • A.O. Smith 750 SERIES - page 11

    11 The operation of these parts is described below: UIM Screens: On all screens a double vertical bar appears on the right side of the display each time a key is touched to indicate that a key has been activated. On several screens an indicator ">" appears on the left side of the display to indicate the active line. The "Up/ Down& ...

  • A.O. Smith 750 SERIES - page 12

    12 except the fault states. If enabled the powered vent and the IRI gas valve are turned on. A command is sent to all active stages to cold purge the system. Cold purging clears out any combustion gas that may be in the combustion chamber . When purging is complete the system moves to the Heat S tate. • Heat St ages 1-4: The system will command t ...

  • A.O. Smith 750 SERIES - page 13

    13 • User Settings Screen: Each setpoint or user setting has either a limited selection of values, or a limited range of values. The Up/Down keys are used to change values. After changing an item, the Select key is pressed to accept the change, or the Menu key is pressed to reject the change and restore the item to its original value. The followi ...

  • A.O. Smith 750 SERIES - page 14

    14 CONNECTION DIAGRAM (Drawing #21 1769) FIGURE 4. ...

  • A.O. Smith 750 SERIES - page 15

    15 ...

  • A.O. Smith 750 SERIES - page 16

    16 Number of cycles for each stage (Number of times stage has been in heat mode). Kbtu rating of the boiler (0 to 5750Kbtu in 10Kbtu increments) The software revision level of the CCB, and FCB micro- controllers. Current Error Screen: • Displays the last error that the system has detected plus a timestamp of when the error occurred. (The timestam ...

  • A.O. Smith 750 SERIES - page 17

    17 TROUBLESHOOTING IGNITION SYSTEM Fault Messages and Lockout S tatus (* = stage number: 1 or 2) Fault Displayed Description Red LED Lockout “Display Fail” Communications with UIM interrupted Continuous Auto Reset • Check communication cable to UIM. T ry moving to other Internal Communications connector on CCB. Also check the connectors where ...

  • A.O. Smith 750 SERIES - page 18

    “Blocked Flue” Flue is Blocked Continuous SOFT • Caused by the blocked flue switch contacts being open when they should have been closed. Check for flue blockage, switch contacts, wiring. “High Limit” Outlet temp. exceeded high limit setpoint Continuous Auto Reset • Caused when the temperature of the outlet probe exceeds the high limit ...

  • A.O. Smith 750 SERIES - page 19

    Other troubleshooting hints: 1. Input switches can be easily checked by observing their activation on the UIM System S tatus screen. Force the boiler to remain in the S t andby mode by opening the Thermost at input or by setting the operating setpoint to the minimum so that the system does not request heat. Then short out the contacts on the switch ...

  • A.O. Smith 750 SERIES - page 20

    20 NOTES ...

  • A.O. Smith 750 SERIES - page 21

    21 NOTES ...

  • A.O. Smith 750 SERIES - page 22

    22 NOTES ...

  • A.O. Smith 750 SERIES - page 23

    23 NEW BOILER LIMITED W ARRANTY A. O. Smith Corporation, the warrantor , extends the following LIMITED W ARRANTY to the owner of this hydronic boiler: 1. If within TEN years after initial installation of the boiler , the heat exchanger shall prove upon examination by the warrantor to be defective in material or workmanship, the warrantor , at his o ...

  • A.O. Smith 750 SERIES - page 24

    24 A DIVISION OF A. O. SMITH CORPORA TION MC BEE, SC., RENTON, WA., STRA TFORD-ONT ARIO, VELDHOVEN-THE NETHERLANDS w w w .hotwater .com ...

Manufacturer A.O. Smith Category Water Heater

Documents that we receive from a manufacturer of a A.O. Smith 750 SERIES can be divided into several groups. They are, among others:
- A.O. Smith technical drawings
- 750 SERIES manuals
- A.O. Smith product data sheets
- information booklets
- or energy labels A.O. Smith 750 SERIES
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 750 SERIES.

A group of documents referred to as user manuals is also divided into more specific types, such as: Installation manuals A.O. Smith 750 SERIES, service manual, brief instructions and user manuals A.O. Smith 750 SERIES. 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 750 SERIES.

Similar manuals

A complete manual for the device A.O. Smith 750 SERIES, 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 750 SERIES by users. Manuals are usually written by a technical writer, but in a language understandable to all users of A.O. Smith 750 SERIES.

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 750 SERIES - 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 750 SERIES, 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 750 SERIES, that we can find in the current document
3. Tips how to use the basic functions of the device A.O. Smith 750 SERIES - which should help us in our first steps of using A.O. Smith 750 SERIES
4. Troubleshooting - systematic sequence of activities that will help us diagnose and subsequently solve the most important problems with A.O. Smith 750 SERIES
5. FAQ - Frequently Asked Questions
6. Contact detailsInformation about where to look for contact to the manufacturer/service of A.O. Smith 750 SERIES in a specific country, if it was not possible to solve the problem on our own.

Do you have a question concerning A.O. Smith 750 SERIES?

Use the form below

If you did not solve your problem by using a manual A.O. Smith 750 SERIES, ask a question using the form below. If a user had a similar problem with A.O. Smith 750 SERIES it is likely that he will want to share the way to solve it.

Copy the text from the picture

Captcha
New picture

Comments (0)