Our goal is to provide you with a quick access to the content of the user manual for A.O. Smith 200M. Using the online preview, you can quickly view the contents and go to the page where you will find the solution to your problem with A.O. Smith 200M.
If looking through the A.O. Smith 200M user manual directly on this website is not convenient for you, there are two possible solutions:
Many people prefer to read the documents not on the screen, but in the printed version. The option to print the manual has also been provided, and you can use it by clicking the link above - Print the manual. You do not have to print the entire manual A.O. Smith 200M but the selected pages only. paper.
Below you will find previews of the content of the user manuals presented on the following pages to A.O. Smith 200M. If you want to quickly view the content of pages found on the following pages of the manual, you can use them.
MODELS HW-120M, 160M, 200M, 225M
COMMERCIAL GAS COPPER HEAT EXCHANGER WATER HEATER
BURKAY UP-FLOW MODELS
Including Models with Intermittent Pilot Ignition (I.I.D.)
• Installation • Operation • Maintenance • Limited Warranty
WARNING: If the information in these
instructions are not followed exactly, a fire
or explosion may result causing property
damage, personal injury or death.
—Do not store or use gasoline or other
flammable vapors and liquids in the
vicinity of this or any other appliance.
ROUGH-IN-DIMENSIONS TABLE 1 - ROUGH-IN DIMENSIONS Models HW-120M HW-160M HW-200M HW-200M Dimensions Inches mm Inches mm Inches mm Inches mm A 49 3/8 1254 50 1/8 1273 53 1/4 1353 60 1524 B 30 3/8 772 30 3/8 772 33 1/8 841 33 1/8 841 C 23 5/8 600 23 5/8 600 27 1/8 689 27 1/8 689 D 20 3/4 527 20 3/4 527 20 3/4 527 20 3/4 527 E 5 1/2 140 5 1/2 140 5 1/2 140 5 1/2 140 F 10 254 10 254 10 254 10 254 G 11 13/16 300 11 13/16 300 11 13/16 300 11 13/16 300 H 6
FOREWORD The factory warranty will be void if the unit(s) have been improperly This design complies with the latest edition of the ANSI Standard Z21.10.3 for gas water heaters Vol. III Storage Water Heaters installed or operated. with input ratings above 75,000 BTU per hour Circulating and In addition to these instructions, the boiler(s) shall be installed in Instantaneous. accordance with those installation regulations in force in the local area where the installation is to be made. These shal
SHOULD OVERHEATING OCCUR OR THE GAS SUPPLY FAIL HIGH ALTITUDE INSTALLATIONS TO SHUT OFF, TURN OFF THE MANUAL GAS CONTROL VALVE TO THE APPLIANCE. WARNING INSTALLATIONS ABOVE 2000 FEET REQUIRE REPLACEMENT Heater must be protected from freezing downdrafts during OF THE BURNER ORIFICE IN ACCORDANCE WITH SECTION shutdown periods. 8.1.2 OF THE NATIONAL FUEL GAS CODE (ANSI Z223.1). FOR CANADIAN INSTALLATIONS CONSULT CANADIAN GROUNDING INSTRUCTIONS INSTALLATION CODES AND CAN/CGA B149. FAILURE TO REP
FEATURES TABLE 4. Control Device Factory Setting Field Adjustment 0 195 F (90.5°C) cut out temp. 0 Heater Automatic Gas Shutoff Control Fixed 190 F (87.7°C) cut in temp. Non-adjustable 0 250 F (121°C) cut out temp. 0 Heater Protector Switch Fixed 200 F (93.3°C) cut in temp. Non-adjustable Tank Temperature Control Field Supplied and Installed Adjust to Requirements Safety Flow Switch See Table 1 Field Adjustable AUTOMATIC GAS SHUTOFF CONTROL The automatic gas shutoff con
4. Discontinues ignition spark when the pilot flame is established. Follow the same oiling procedure if a replacement circulator is The S-8600 control used on propane gas models provides installed into the system. safety lockout if the pilot fails to ignite within the pilot flame establishing period. The S-8600 control used on natural gas TANK TEMPERATURE CONTROL models continues trial for ignition until pilot flame is established. (Not Supplied) 5. After proof-of-pilot flame, opens the main va
CAUTION: The paddle must be trimmed at the dotted arc. It must not touch the pipe or any restrictions when installed. FIGURE 5 The installer is cautioned to follow the manufacturer’s instructions CAUTION exactly when inserting this switch into a pipe tee. This is necessary Any part of the paddle must not touch the pipe or any restrictions in order to assure positive action of the switch with water flow. in the pipe. Screw the flow switch in position so the flat of the Once the minimum flow r
INSTALLATION INSTRUCTIONS For appliance installation in locations with elevations above 2,000 IMPORTANT feet (600M), refer to HIGH ALTITUDE INSTALLATIONS section of this manual for input reduction procedure. Strict adherence to installation wiring diagrams shown in this manual is required to prevent constant pump operation when the system temperature control is satisfied, otherwise the warranty is INSTALLATION CLEARANCES void as stipulated under item 2a (6) of the LIMITED WARRANTY. These units a
CONFINED SPACE Do not install without draft hood and do not install any damper in flueway. Be sure that the vent pipe does not extend beyond When drawing combustion and dilution air from inside a the inside wall of the chimney. conventionally constructed building to a confined space, such a 2. Where a continuous or intermittent back draft is found to exist, space shall be provided with two permanent openings, ONE IN OR WITHIN 12 INCHES (30.5cm) OF THE ENCLOSURE the cause must be determined and
Your local code authority may have other specific relief valve WATER LINE CONNECTIONS requirements not covered in this section. This manual provides detailed installation diagrams for typical THE PURPOSE OF A RELIEF VALVE IS TO AVOID EXCESSIVE methods of application. See piping diagrams. PRESSURE OR TEMPERATURE INTO THE STEAM RANGE, WHICH MAY CAUSE SCALDING AT FIXTURES, TANK • Cer-Temp 80 Recovery System (for one temperature water). EXPLOSION, SYSTEM OR HEATER DAMAGE. These diagrams will serve
PIPING DIAGRAMS DANGER TEMPERATURE SETTING SHOULD NOT EXCEED SAFE USE TEMPERATURE AT FIXTURES. SEE WATER TEMPERATURE CONTROL WARNING ON PAGE 19. IF HIGHER PREHEAT TEMPERATURES ARE NECESSARY TO OBTAIN ADEQUATE BOOSTER OUTPUT, ADD AN ANTI-SCALD VALVE FOR HOT WATER SUPPLIED TO FIXTURES. (USE THIS DIAGRAM FOR STRAIGHT RECOVERY SYSTEMS SUPPLYING HOT WATER AT ONE TEMPERATURE ONLY) FIGURE 7 11
DANGER TEMPERATURE SETTING SHOULD NOT EXCEED SAFE USE TEMPERATURE AT FIXTURES. SEE WATER TEMPERATURE CONTROL WARNING ON PAGE 19. IF HIGHER PREHEAT TEMPERATURES ARE NECESSARY TO OBTAIN ADEQUATE BOOSTER OUTPUT, ADD AN ANTI-SCALD VALVE FOR HOT WATER SUPPLIED TO FIXTURES. FIGURE 8 12
DANGER TEMPERATURE SETTING SHOULD NOT EXCEED SAFE USE TEMPERATURE AT FIXTURES. SEE WATER TEMPERATURE CONTROL WARNING ON PAGE 19. IF HIGHER PREHEAT TEMPERATURES ARE NECESSARY TO OBTAIN ADEQUATE BOOSTER OUTPUT, ADD AN ANTI-SCALD VALVE FOR HOT WATER SUPPLIED TO FIXTURES. FIGURE 9 FIGURE 10 13
acceptable for the purpose in locating gas leaks. DO NOT USE GAS CONNECTIONS MATCHES, CANDLES, FLAME OR OTHER SOURCES OF IGNITION FOR THIS PURPOSE. WARNING THE INLET GAS PRESSURE MUST NOT EXCEED THE VALUE DISCONNECT THE HEATER AND ITS MANUAL GAS SHUTOFF SPECIFIED BY THE MANUFACTURER ON THE RATING PLATE VALVE FROM THE GAS SUPPLY PIPING SYSTEM DURING (10.5" W.C. - NATURAL GAS, 13.0" W.C. - PROPANE GAS). ANY PRESSURE TESTING OF THAT SYSTEM AT TEST EXPOSURE TO HIGHER GAS SUPPLY PRESSURE MAY CAUSE
A minimum gas supply pressure of 4.5" W.C. (1.12kPa) for natural Figures 11 and 12 show the heater mounted controls as they are gas and 11" W.C. (1.74kPa) for propane gas is required for wired when the heater leaves the factory. Using the individual purposes of input adjustment. wiring diagrams on the installation diagrams, the installer connects his wiring to terminals in the heater(s) mounted junction box as shown. ELECTRICAL INFORMATION All wiring should be done such that the heater(s) will
ELECTRICAL WIRING DIAGRAMS FOR THE HW-120M, 160M, AND 200M WATER HEATERS I.I.D. SYSTEM (PROPANE) FIGURE 12 NOTES: 16
OPERATION CAUTION PURGING SHOULD BE PERFORMED BY PERSONS IMPORTANT EXPERIENCED IN THIS TYPE GAS SERVICE. TO AVOID RISK OF FIRE OR EXPLOSION, PURGE DISCHARGE MUST NOT Only qualified personnel shall perform the initial firing of the heater. ENTER CONFINED AREAS OR SPACES WHERE IGNITION At this time the user should not hesitate to ask the start-up CAN OCCUR. THE AREA MUST BE WELL VENTILATED AND technician any questions regarding the operation and ALL SOURCES OF IGNITION MUST BE INACTIVATED OR ma
OPERATING INSTRUCTIONS FOR I.I.D. MODELS The I.I.D. models have an automatic intermittent spark ignition system, figure 3, mounted on the jacket at the front of the heater which ignites the pilot gas whenever system controls call for heat. Start the unit in accordance with the instructions on the operating label attached to the heater. These instructions are repeated in the following. FOR YOUR SAFETY READ BEFORE OPERATING WARNING: IF YOU DO NOT FOLLOW THESE INSTRUCTIONS EXACTLY A FIRE OR EXPLO
2. Attach a pressure gauge or a manometer to the outlet pressure DANGER tap, figure 14 and refer to table 3 for correct manifold pressure. HOT WATER TEMPERATURES REQUIRED FOR AUTOMATIC 3. Fire the heater by turning the gas valve control knob to “ON”. DISHWASHER AND LAUNDRY USE CAN CAUSE SCALD 4. Use this formula to “clock” the meter. Be sure that other gas BURNS RESULTING IN SERIOUS PERSONAL INJURY AND/ consuming appliances are not operating during this interval. OR DEATH. THE TEMPERATURE AT
SERVICE INFORMATION The installer may be able to observe and correct certain problems 5. Restore electrical power and gas supply to heater. which may arise when the unit is put into operation. HOWEVER, • Check for gas leaks and proper heater and vent operation. it is recommended that only qualified service personnel, using appropriate test equipment, be allowed to service the heater. I.I.D. PILOT BURNER Any safety devices used in conjunction with this appliance should receive periodic (at least
|1||A.O. Smith 160M||Fan||17|
|2||A.O. Smith HW-120M||Fan||39|
|3||A.O. Smith 225M||Fan||27|