State Water Heaters ASME SW 37-670, Instruction Manual

Page 1: ...for future reference COMMERCIAL ELECTRIC BOILERS Thank you for buying this energy efficient boiler from us We appreciate your confidence in our products MODELS SW 37 670 INSTALLATION OPERATION SERVICE MAINTENANCE LIMITED WARRANTY A DIVISION OF A O SMITH CORPORATION RENTON WASHINGTON www statewaterheaters com ASME ...

Page 2: ...t the type of hazard what can happen if you do not follow the safety message and how to avoid the risk of injury The California Safe Drinking Water and Toxic Enforcement Act requires the Governor of California to publish a list of substances known to the State of California to cause cancer birth defects or other reproductive harm and requires businesses to warn of potential exposure to such substa...

Page 3: ...may also cause erratic control system operation on ELECTRONIC CONTROL models This boiler must be connected to a grounded metal permanent wiring system or an equipment grounding conductor must be run with the circuit conductors and connected to the equipment grounding terminal or lead on the boiler HYDROGEN GAS FLAMMABLE Hydrogen gas can be produced in a hot water system served by this boiler that ...

Page 4: ...when standing in water When replacing fuses always use the correct size for the circuit See page 12 through 14 The principal components of the heater are identified on page 8 The model and rating plate on page 9 interprets certain markings into useful information Both of these references should be used to identify the heater its components and optional equipment 2 The installation must conform wit...

Page 5: ... 4 4 4 3 3 3 3 1 1 1 1 SW SW SW SW SW 96 96 96 96 96 330K 390K 420K 450K 480K 36 36 36 36 36 38 38 38 38 38 16 16 16 16 16 69 1 2 69 1 2 69 1 2 69 1 2 69 1 2 17 17 17 17 17 1 1 2 1 1 2 1 1 2 1 1 2 1 1 2 17 17 17 17 17 22 22 22 22 22 5 5 5 5 5 4 4 4 4 4 1 1 4 1 1 4 1 1 4 1 1 4 1 1 4 SW SW SW SW 150 150 150 150 540K 600K 660K 720K 46 46 46 46 44 44 44 44 19 19 19 19 69 1 2 69 1 2 69 1 2 69 1 2 20 20...

Page 6: ...0 1800K 1860K 1980K 2100K 66 66 66 66 56 56 56 56 28 28 28 28 90 1 2 90 1 2 90 1 2 90 1 2 25 1 2 25 1 2 25 1 2 25 1 2 2 1 2 2 1 2 2 1 2 2 1 2 30 30 30 30 33 33 33 33 7 3 4 7 3 4 7 3 4 7 3 4 8 8 8 8 2 2 2 2 SW SW SW SW 500 500 500 500 2200K 2340K 2460K 2580K 72 72 72 72 62 62 62 62 31 31 31 31 90 1 2 90 1 2 90 1 2 90 1 2 26 1 2 26 1 2 26 1 2 26 1 2 2 1 2 2 1 2 2 1 2 2 1 2 34 34 34 34 36 36 36 36 7 ...

Page 7: ... 60 2 90 4 90 6 60 1501 1668 1299 1443 648 720 792 864 542 602 663 723 SW SW SW SW SW SW SW 220 220 220 220 220 220 220 780K 840K 900K 960K 1020K 1080K 1140K 2 662 140 2 866 920 3 071 700 3 276 480 3 481 260 3 636 040 3 890 820 3198 3444 3690 3936 4182 4428 4674 52 56 60 64 68 72 76 10 10 10 10 10 10 10 6 90 4 60 9 90 1 30 10 90 8 90 2 120 6 90 4 120 4 90 6 120 2 90 8 120 936 1008 1080 1152 1224 1...

Page 8: ...8 FEATURES AND COMPONENTS ACTUAL CONFIGURATION MAY VARY ...

Page 9: ...o the area adjacent to the boiler or to lower floors of the structure 3 The discharge opening of the temperature and pressure relief valve should always be piped to an open drain 4 Close to the point of major hot water usage and the power supply Hot water piping and branch circuit wiring should be as short as possible Insulate hot and cold water piping where heat loss and condensation may be a pro...

Page 10: ...out being certain the boiler is filled with water and a properly sized pressure relief valve is installed in the relief valve opening provided The pressure rating of the relief valve should be equal to or less than the rated pressure capacity of any component in the system including the boiler Should the valve need to be replaced call the toll free phone number listed on the back of this manual fo...

Page 11: ...ing increase in water pressure due to thermal expansion Thermal expansion can cause premature tank failure leakage This type of failure is not covered under the limited warranty Thermal expansion can also cause intermittent pressure relief valve operation water discharged from the valve due to excessive pressure build up This condition is not covered under the limited warranty The pressure relief ...

Page 12: ...ith this computation the next higher standard rating or setting should be selected Boiler Circuits The boiler s electrical components are pictured and identified on page 8 The model and rating plate illustration on page 9 identifies the electrical characteristics Basically there are two electrical circuits The control circuit where the temperature control directly or indirectly operates the contac...

Page 13: ...ITH THERMOSTAT NOTE S 1 IF A MANUAL RESET HLMT IS USED THE SECOND AUTO RESET HLMT SWITCH IS NOT USED STD WIRING OPTIONAL OR FIELD WIRING AS REQ D NOTE S 1 IF A MANUAL RESET HLMT IS USED THE SECOND AUTO RESET HLMT SWITCH IS NOT USED STD WIRING OPTIONAL OR FIELD WIRING AS REQ D CONTACTOR COIL INDICATION LIGHT ...

Page 14: ...ION LIGHT 1 OFF ON 2200 2 OFF ON 135 3 OFF ON 4 20MA 4 OFF ON 0 10VDC 5 DS PROP 6 PROG UN 7 OFF VER 8 SEC MN 1 DELAY 1 2 DELAY 2 3 DELAY 3 4 1 5 2 6 4 7 5 8 16 THE ABOVE DIP SWITCH SETTINGS ARE AN EXAMPLE FOR THE FOLLOWING 2200 OHM PROPORTIONAL PROGRESSIVE VERNER OFF SECONDS 10 SECOND 3 STAGE INPUTS DELAY STAGES 1 OFF ON 2200 2 OFF ON 135 3 OFF ON 4 20MA 4 OFF ON 0 10VDC 5 DS PROP 6 PROG UN 7 OFF ...

Page 15: ...ay be in the control circuit in addition to the automatic high limit previously described The control has an adjustable range of 110 F to 290 F and activates and locks on a temperature increase When the temperature declines the manual reset high limit can be reset A manual reset high limit is an optional substitution for one of the automatic high limits mentioned above The manual reset button is l...

Page 16: ...pproximate time to burn relationship for normal adult skin Water Temperature Time to Produce 2nd 3rd Degree Burns on Adult Skin 180 F 82 C 160 F 82 C 150 F 82 C 140 F 82 C 130 F 82 C 120 F 82 C 80 F 82 C Nearly Instantaneous About 1 2 second About 1 1 2 seconds Less than 5 seconds About 30 seconds More than 5 minutes FIGURE 1 Additional instructional literature is provided with the boiler for adju...

Page 17: ...idential pipe dope thread cutting oil solder flux dirt and other foreign materials breakdown to form gas This is indicated by a continuing need for purging even through the system is closed 2 Pump seal leakage Acidic water low pH and contamination such as soil and sand result in premature or recurring pump seal failures 3 Automatic air valve leakage Contaminants cause sticky sealing surfaces and r...

Page 18: ... switch serving the boiler is in the ON position The pilot switch es on the cabinet front should be on In some installations the boiler electrical service may be limited by the power company or boiler controls If the boiler operates on a controlled circuit heat may be effected 2 Check the fuses The electrical disconnect switch usually contains fuses The boiler has fuses located behind the cabinet ...

Page 19: ...tive charges for forwarding the new tank or replacement part from the nearest distributor and returning the claimed defective tank or part to such distributor c All cost necessary or incidental for any materials and or permits required for installation of the replacement tank or part 5 LIMITATION ON IMPLIED WARRANTIES Implied warranties including any warranty of merchantability imposed on the sale...

Page 20: ...A DIVISION OF A O SMITH CORPORATION RENTON WASHINGTON Technical Support 800 527 1953 Parts Department 800 433 2515 www statewaterheaters com ...