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A.O. Smith BTR 500 Instruction Manual

Manual is about: SERIES 120/121 commercial gas water heaters

Summary of BTR 500

  • Page 1

    Commercial gas water heaters instruction manual printed 0111 318230-001 place these instructions adjacent to heater and notify owner to keep for future reference. Thank you for buying this energy efficient water heater. We appreciate your confidence in our products. Read and understand this instruct...

  • Page 2: Table Of Contents

    2 outdoor air through two vertical ducts ........................................17 air from other indoor spaces .......................................................17 technical data venting ..................................................................18 water heater installation ..............

  • Page 3: Asme Crn

    3 safe installation, use and service the proper installation, use and servicing of this water heater is extremely important to your safety and the safety of others. Many safety-related messages and instructions have been provided in this manual and on your own water heater to warn you and others of ...

  • Page 4: General Safety Information

    4 general safety information fire hazard do not install water heater on carpeted floor. Do not operate water heater if flood damaged. For continued protection against risk of fire: fire or explosion hazard read instruction manual before installing, using or servicing water heater. Avoid all ignition...

  • Page 5: General Safety Information

    5 precautions do not use this appliance if any part has been under water. Immediately call a qualified service agency to inspect the appliance and to make a determination on what steps should be taken next. If the unit is exposed to the following, do not operate heater until all corrective steps hav...

  • Page 6: Introduction

    6 thank you for purchasing this water heater. Properly installed and maintained, it should give you years of trouble free service. Abbreviations used abbreviations found in this instruction manual include : • ansi - american national standards institute • asme - american society of mechanical engine...

  • Page 7: Features And Components

    7 the eliminator (self-cleaning system) these units include the eliminator (self-cleaning system) installed in the front water inlet, see figure 1. The eliminator inlet tube can only be used in the front water inlet connection. Do not install the eliminator inlet tube in either the top or back inlet...

  • Page 8: Installation Considerations

    8 rough in dimensions recovery capacities gas and electrical characteristics front view top view back view table 2. Recovery capacities, based on 80% efficiency f top outlet 1 1/2” npt top inlet 1 1/2” npt table 3. Gas and electrical characteristics table 1. Rough-in-dimensions model input rate btu/...

  • Page 9: Caution

    9 is not subject to physical damage by a moving vehicle. Flammable items, pressurized containers or any other potential fire hazardous articles must never be placed on or adjacent to the heater. Open containers or flammable material should not be stored or used in the same room with the heater. The ...

  • Page 10

    10 insulation blanket do not obstruct water heater air intake with insulating blanket. Gas and carbon monoxide detectors are available. Install water heater in accordance with the instruction manual. Breathing carbon monoxide can cause brain damage or death. Always read and understand instruction ma...

  • Page 11

    11 breathing hazard - carbon monoxide gas breathing carbon monoxide can cause brain damage or death. Always read and understand instruction manual. Under no circumstances should the input exceed the rate shown on the water heater’s rating label. Overfiring could result in damage to the water heater ...

  • Page 12: Installation Requirements

    12 water temperature control and mixing valves water temperature over 125°f (52°c) can cause severe burns instantly resulting in severe injury or death. Children, the elderly and the physically or mentally disabled are at highest risk for scald injury. Feel water before bathing or showering. Tempera...

  • Page 13

    13 hot water outlet to tank inlet check valve mixing valve cold water inlet tempered water outlet 12” to 15” (30-38 cm) check valve figure 10 dishwashing machines all dishwashing machines meeting the national sanitation foundation requirements are designed to operate with water flow pressures betwee...

  • Page 14: Caution

    14 no valve or other obstruction is to be placed between the temperature-pressure relief valve and the tank. Do not connect discharge piping directly to the drain unless a 6” (15.2 cm) air gap is provided. To prevent bodily injury, hazard to life, or property damage, the relief valve must be allowed...

  • Page 15: Venting Installation

    15 through the water heater’s vent system causing poor combustion. Sooting, serious damage to the water heater and the risk of fire or explosion may result. It can also create a risk of asphyxiation. Louvers and grilles the free areas of the fresh air openings in the instructions that follow do not ...

  • Page 16

    16 vent with an oil burning furnace, the vent pipe should enter the smaller common vent or chimney at a point above the large vent pipe. Multiple heater manifold figure 13 and table 7 should be used for horizontally manifolding two or more heaters. Figure 13 fresh air openings for confined spaces th...

  • Page 17

    17 when ducts are used, they shall be of the same cross sectional area as the free area of the openings to which they connect. The minimum dimension of rectangular air ducts shall be not less than 3 inches. Air from other indoor spaces figure 18 the confined space shall be provided with two permanen...

  • Page 18

    18 type b gas vent multiple gas fired tank-type heaters when venting multiple tank type heaters using type b vent pipe, follow the installation diagram (figure 13) and tables below which give sizing and data based upon nfpa 54/ansi z223. 2006. Table 7. Technical data venting model 500 input: 500,000...

  • Page 19: Water Heater Installation

    19 water heater installation this water heater is provided with a properly rated/sized and certified combination temperature - pressure (t&p) relief valve by the manufacturer. See temperature-pressure relief valve on pages 13-14 for information on replacement and other requirements. Water damage haz...

  • Page 20

    20 installation diagrams - top inlet/outlet usage use of the top inlet water connection requires installation of an inlet dip tube (refer to figure 19). The tube is supplied in the heater. Follow caution labels if applying heat to this fitting. Do not allow pipe dope to contact the plastic tube duri...

  • Page 21

    21 heater wiring all electrical work must be installed in accordance with the latest version of the national electrical code ansi/nfpa no. 70 and must conform to all local code authority having jurisdiction. An electrical ground is required to reduce risk of electrical shock or possible electrocutio...

  • Page 22

    22 gas piping contact your local gas service company to ensure that adequate gas service is available and to review applicable installation codes for your area. Size the main gas line in accordance with table 9. The figures shown are for straight lengths of pipe at 0.5 in. W.C. Pressure drop, which ...

  • Page 23: Operation

    23 board waits 3 seconds and then shuts off power to the silicon nitride ignitor. 11. From the time the silicon nitride ignitor’s power is shut off, the ignition control board waits 3 more seconds to monitor the flame sensor. 12. If the flame sensor does not detect a strong enough flame, the ignitio...

  • Page 24

    24 lighting & operation label flammable if you do not follow these instructions exactly, a fire or explosion may result causing property damage, personal injury, or loss of life. Warning operating instructions for your safety read before operating a. 1. 6. 2. C. D. B. This appliance does not have a ...

  • Page 25

    25 check venting the following steps shall be followed with each appliance connected to the venting system placed in operation, while any other appliances connected to the venting system are not in operation. 1. Seal any unused openings in the venting system. 2. Inspect the venting system for proper...

  • Page 26: Maintenance

    26 when checking the temperature-pressure relief valve operation, make sure that (1) no one is in front of or around the outlet of the temperature-pressure relief valve discharge line, and (2) that the water discharge will not cause any property damage, as the water may be extremely hot. Use care wh...

  • Page 27: Caution

    27 draining and flushing burn harzard. Hot water discharge. Keep hands clear of drain valve discharge. It is recommended that the water heater storage tank be drained and flushed every 6 months to reduce sediment buildup. The water heater should be drained if being shut down during freezing temperat...

  • Page 28

    28 note: un•lime is not available for use in canada. Hydrochloric base acids are not recommended for use on glass lined tanks. Observe handling instructions on label of product being used. Tank cleanout procedure the following practices will ensure longer life and enable the unit to operate at its d...

  • Page 29

    29 prepare the up-n-down transfer kit the next step is the preparation of the up-n-down transfer kit, if you have not already done so: 1. With the 5 gallon up-n-down container in the vertical position, unscrew the plastic vent cap in the handle and pierce the plastic membrane over the vent boss unde...

  • Page 30: For Your Information

    30 system diagnostics your water heater is equipped with an ignition module that incorporates a diagnostic system to assist in troubleshooting the appliance. The indicator codes on the ignition module are as follows: table 11: 1 flash system lockout (retries or cycles exceeded) 2 flashes pressure sw...

  • Page 31

    31 system are used (such as a dishwasher or washing machine). If hydrogen gas is present, there will probably be an unusual sound similar to air escaping through the pipe as the hot water faucet is opened. There must be no smoking or open flame near the faucet at the time it is open. High water temp...

  • Page 32

    32 sequence of operation flow chart description of this flow chart can be found in the “sequence of operation” section found on page 23. Figure 29.

  • Page 33: Operational Checklist

    33 operational checklist complaint cause remedy user service agent *water not hot enough thermostat set too low. Set thermostat dial to a higher temperature upper and/or lower temperature probe out of calibration. Call service agent check continuity and resistance (ohms) of upper and lower temperatu...

  • Page 34: Water Piping Diagrams

    34 water piping diagrams n otes : 1. P re ferred piping diagram . 2. The tempera ture and pre ss ure relie f valve se tting shall no t exceed pressure ra ting o f any componen t in the sys tem . 3. S ervi ce v al ves are s hown for ser vicing uni t. Howeve r, local codes shall govern their usage . 4...

  • Page 35

    35 n otes : 1. P re ferred piping diagram . 2. The tempera ture and pre ss ure relie f valve se tting shall no t exceed pressure ra ting o f any componen t in the sys tem . 3. S ervi ce v al ves are s hown for ser vicing uni t. Howeve r, local codes shall govern their usage . 4. The t ank t empera t...

  • Page 36

    36 n otes : 1. P re ferred piping diagram . 2. The tempera ture and pre ss ure relie f valve se tting shall no t exceed pressure ra ting o f any componen t in the sys tem . 3. S ervi ce v al ves are s hown for ser vicing uni t. Howeve r, local codes shall govern their usage . 4. The t ank t empera t...

  • Page 37

    37 n otes : 1. P re ferred piping diagram . 2. The tempera ture and pre ss ure relie f valve se tting shall no t exceed pressure ra ting o f any componen t in the sys tem . 3. S ervi ce v al ves are s hown for ser vicing uni t. Howeve r, local codes shall govern their usage . 4. The t ank t empera t...

  • Page 38

    38 n otes : 1. P re ferred piping diagram . 2. The tempera ture and pre ss ure relie f valve se tting shall no t exceed pressure ra ting o f any componen t in the sys tem . 3. S ervi ce v al ves are s hown for ser vicing uni t. Howeve r, local codes shall govern their usage . 4. The t ank t empera t...

  • Page 39

    39 n otes : 1. P re ferred piping diagram . 2. The tempera ture and pre ss ure relie f valve se tting shall no t exceed pressure ra ting o f any componen t in the sys tem . 3. S ervi ce v al ves are s hown for ser vicing uni t. Howeve r, local codes shall govern their usage . 4. The t ank t empera t...

  • Page 40

    40 n otes : 1. P re ferred piping diagram . 2. The tempera ture and pre ss ure relie f valve se tting shall no t exceed pressure ra ting o f any componen t in the sys tem . 3. S ervi ce v al ves are s hown for ser vicing uni t. Howeve r, local codes shall govern their usage . 4. The t ank t empera t...

  • Page 41

    41 n otes : 1. P re ferred piping diagram . 2. The tempera ture and pre ss ure relie f valve se tting shall no t exceed pressure ra ting o f any componen t in the sys tem . 3. S ervi ce v al ves are s hown for ser vicing uni t. Howeve r, local codes shall govern their usage . Mu lti flue (2 units) t...

  • Page 42

    42 n otes : 1. P re ferred piping diagram . 2. The tempera ture and pre ss ure relie f valve se tting shall no t exceed pressure ra ting o f any componen t in the sys tem . 3. S ervi ce v al ves are s hown for ser vicing uni t. Howeve r, local codes shall govern their usage . Mu lti f lue (2 units) ...

  • Page 43

    43 n otes : 1. P re ferred piping diagram . 2. The tempera ture and pre ss ure relie f valve se tting shall no t exceed pressure ra ting o f any componen t in the sys tem . 3. S ervi ce v al ves are s hown for ser vicing uni t. Howeve r, local codes shall govern their usage . Mu lti-f lue (3 units) ...

  • Page 44

    44 n otes : 1. P re ferred piping diagram . 2. The tempera ture and pre ss ure relie f valve se tting shall no t exceed pressure ra ting o f any componen t in the sys tem . 3. S ervi ce v al ves are s hown for ser vicing uni t. Howeve r, local codes shall govern their usage . 4. The t ank t empera t...

  • Page 45

    45 n otes : 1. P re ferred piping diagram . 2. The tempera ture and pre ss ure relie f valve se tting shall no t exceed pressure ra ting o f any componen t in the sys tem . 3. S ervi ce v al ves are s hown for ser vicing uni t. Howeve r, local codes shall govern their usage . 4. The t ank t empera t...

  • Page 46

    46 n otes : 1. P re ferred piping diagram . 2. The tempera ture and pre ss ure relie f valve se tting shall no t exceed pressure ra ting o f any componen t in the sys tem . 3. S ervi ce v al ves are s hown for ser vicing uni t. Howeve r, local codes shall govern their usage . Mu lti f lue f lue (4 u...

  • Page 47

    47 n otes : 1. P re ferred piping diagram . 2. The tempera ture and pre ss ure relie f valve se tting shall no t exceed pressure ra ting o f any componen t in the sys tem . 3. S ervi ce v al ves are s hown for ser vicing uni t. Howeve r, local codes shall govern their usage . 4. The t ank t empera t...

  • Page 48

    48 n otes : 1. P re ferred piping diagram . 2. The tempera ture and pre ss ure relie f valve se tting shall no t exceed pressure ra ting o f any componen t in the sys tem . 3. S ervi ce v al ves are s hown for ser vicing uni t. Howeve r, local codes shall govern their usage . 4. The t ank t empera t...

  • Page 49: Manifold Kits

    49 manifold kits manifold kits two unit manifold kit (part no. 9003426205) three unit manifold kit (part no. 9003427205) four unit manifold kit (part no. 9003428205) model dimension "a" btr-500 81.5".

  • Page 50: Limited Warranty

    50 limited warranty.

  • Page 51: Notes

    Notes.

  • Page 52

    500 tennessee waltz pkwy., ashland city, tn 37015 technical support: 800-527-1953 • parts: 800-433-2545 • fax: 800-644-9306 www.Hotwater.Com copyright © 2010 a.O. Smith corporation, all rights reserved..