A.O. Smith 200M - Manuals

5 AUTOMATIC GAS SHUTOFF CONTROL The automatic gas shutoff control, fig. 1, is an automatic safetydevice which activates at a water temperature of approximately195 0 F (90.5°C). This limits the water outlet temperature to a maximum of 200 0 F (87.7°C). The device is wired in series with the gas valve...

6 4. Discontinues ignition spark when the pilot flame is established. The S-8600 control used on propane gas models providessafety lockout if the pilot fails to ignite within the pilot flameestablishing period. The S-8600 control used on natural gasmodels continues trial for ignition until pilot fla...

7 CAUTION Any part of the paddle must not touch the pipe or any restrictionsin the pipe. Screw the flow switch in position so the flat of thepaddle is at right angles to the flow. The arrow on the side casemust point in the direction of the flow. The safety flow switch may be field adjusted to obtai...

8 INSTALLATION INSTRUCTIONS IMPORTANT Strict adherence to installation wiring diagrams shown in thismanual is required to prevent constant pump operation when thesystem temperature control is satisfied, otherwise the warranty isvoid as stipulated under item 2a (6) of the LIMITED WARRANTY. REQUIRED A...

9 CONFINED SPACE W h e n d r a w i n g c o m b u s t i o n a n d d i l u t i o n a i r f r o m i n s i d e aconventionally constructed building to a confined space, such aspace shall be provided with two permanent openings, ONE INOR WITHIN 12 INCHES (30.5cm) OF THE ENCLOSUREBOTTOM. Each opening shal...

10 Your local code authority may have other specific relief valverequirements not covered in this section. THE PURPOSE OF A RELIEF VALVE IS TO AVOID EXCESSIVEPRESSURE OR TEMPERATURE INTO THE STEAM RANGE,W H I C H M AY C A U S E S C A L D I N G AT F I X T U R E S , TA N KEXPLOSION, SYSTEM OR HEATER D...

11 PIPING DIAGRAMS ( U S E T H I S D I A G R A M F O R S T R A I G H T R E C O V E R YS Y S T E M S S U P P LY I N G H O T WAT E R AT O N ETEMPERATURE ONLY) FIGURE 7 DANGER TEMPERATURE SETTING SHOULD NOT EXCEED SAFE USE TEMPERATURE ATFIXTURES. SEE WATER TEMPERATURE CONTROL WARNING ON PAGE 19. IF HIG...

12 FIGURE 8 DANGER T E M P E R AT U R E S E T T I N G S H O U L D N O T E X C E E D S A F E U S ETEMPERATURE AT FIXTURES. SEE WATER TEMPERATURE CONTROLWARNING ON PAGE 19. IF HIGHER PREHEAT TEMPERATURES ARENECESSARY TO OBTAIN ADEQUATE BOOSTER OUTPUT, ADD ANANTI-SCALD VALVE FOR HOT WATER SUPPLIED TO F...

13 FIGURE 9 FIGURE 10 DANGER TEMPERATURE SETTING SHOULD NOT EXCEED SAFE USE TEMPERATUREAT FIXTURES. SEE WATER TEMPERATURE CONTROL WARNING ONPAGE 19. IF HIGHER PREHEAT TEMPERATURES ARE NECESSARY TOOBTAIN ADEQUATE BOOSTER OUTPUT, ADD AN ANTI-SCALD VALVE FORHOT WATER SUPPLIED TO FIXTURES.

14 GAS CONNECTIONS WARNING THE INLET GAS PRESSURE MUST NOT EXCEED THE VALUESPECIFIED BY THE MANUFACTURER ON THE RATING PLATE(10.5" W.C. - NATURAL GAS, 13.0" W.C. - PROPANE GAS).EXPOSURE TO HIGHER GAS SUPPLY PRESSURE MAY CAUSEDAMAGE TO THE GAS VALVE WHICH COULD RESULT IN FIREOR EXPLOSION. IF ...

15 ELECTRICAL WIRING DIAGRAMS FOR THE HW-120M, 160M, 200M AND 225M WATER HEATERS I.I.D. SYSTEM (NATURAL) FIGURE 11 A minimum gas supply pressure of 4.5" W.C. (1.12kPa) for naturalgas and 11" W.C. (1.74kPa) for propane gas is required forpurposes of input adjustment. ELECTRICAL INFORMATION A ...

17 OPERATION IMPORTANT Only qualified personnel shall perform the initial firing of the heater.At this time the user should not hesitate to ask the start-upt e c h n i c i a n a n y q u e s t i o n s r e g a r d i n g t h e o p e r a t i o n a n dmaintenance of the unit. Lighting and Operating instr...

19 DANGER HOT WATER TEMPERATURES REQUIRED FOR AUTOMATICDISHWASHER AND LAUNDRY USE CAN CAUSE SCALDBURNS RESULTING IN SERIOUS PERSONAL INJURY AND/OR DEATH. THE TEMPERATURE AT WHICH INJURY OCCURSVARIES WITH THE PERSON’S AGE AND TIME OF EXPOSURE.THE SLOWER RESPONSE TIME OF CHILDREN, AGED ORDISABLED PERS...

20 SERVICE INFORMATION The installer may be able to observe and correct certain problemswhich may arise when the unit is put into operation. HOWEVER,it is recommended that only qualified service personnel, usingappropriate test equipment, be allowed to service the heater. Any safety devices used in ...

22 PREVENTIVE MAINTENANCE RECOMMENDED PROCEDURE FOR PERIODIC REMOVAL OF LIME DEPOSITS FROM COIL TYPE COMMERCIAL WATER HEATERS The amount of calcium carbonate (lime) released from water is indirect proportion to water temperature and usage, see fig. 17. CAUTION DO NOT USE A NYLON BRUSH OR OTHER STATI...

23 The usage of water softening equipment greatly reduces thehardness of the water. However, this equipment does not alwaysr e m o v e a l l o f t h e h a r d n e s s ( l i m e ) . F o r t h i s r e a s o n i t i srecommended that a regular schedule for deliming be maintained. The time between clean...

24 CHART 1 - CER-TEMP 80 RECOVERY SYSTEM CHECKOUT PROCEDURE (Use this checkout for Cer-Temp 80 Recovery Systems) CHECKOUT The checkout sequence should be used as an on-the-job trouble-shooting guide to identify the cause of incorrect system operationand suggest a remedy for its correction. Because i...

28 MODEL HW LIMITED WARRANTY A. O. Smith Corporation, the warrantor, extends the following LIMITED WARRANTY to the owner of this water heater. 1. If within FIVE years after initial installation of this water heater, a heat exchanger, coil or gas burner shall prove upon examination by the warrantor t...