A.O. Smith 52 Instruction Manual Download

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Instruction Manual

PRINTED 0917

100293658 2000548791 (Rev. A)

PLACE THESE INSTRUCTIONS ADJACENT TO HEATER AND NOTIFY OWNER TO KEEP FOR FUTURE REFERENCE.

COMMERCIAL ELECTRIC WATER HEATERS

(OPTIONAL)

Thank you for buying this energy efficient water

heater. We appreciate your confidence in our

products.

MODELS 52/80/120 SERIES 100

INSTALLATION - OPERATION - SERVICE

MAINTENANCE - LIMITED WARRANTY

Printed on 2/8/2018 9:05 AM CT

Summary of Contents for 52

Page 1: ...D NOTIFY OWNER TO KEEP FOR FUTURE REFERENCE COMMERCIAL ELECTRIC WATER HEATERS OPTIONAL Thank you for buying this energy efficient water heater We appreciate your confidence in our products MODELS 52 8...

Page 2: ...death WARNING indicates a potentially hazardous situation which if not avoided could result in injury or death CAUTION indicates a potentially hazardous situation which if not avoided could result in...

Page 3: ...pe as the water begins to flow THERE SHOULD BE NO SMOKING OR OPEN FLAME NEAR THE FAUCET AT THE TIME IT IS OPEN Water temperature over 125 F 52 C can cause severe burns instantly resulting in severe in...

Page 4: ...ONVERSION TO SINGLE PHASE 20 CONVERSION TO THREE PHASE 20 OPERATION 21 GENERAL 21 FILLING THE WATER HEATER 21 INITIAL START UP 21 Draining the Water Heater 21 TEMPERATURE REGULATION 22 High Temperatur...

Page 5: ...he electrical system of the heater Never touch electrical components with wet hands or when standing in water When replacing fuses always use the correct size for the circuit see page 13 The principal...

Page 6: ...390 410 307 246 205 176 154 137 123 112 102 95 88 36 122 868 492 369 295 246 211 184 164 148 134 123 113 105 40 5 138 226 554 418 3332 277 237 208 1185 166 151 138 128 119 45 153 585 615 461 369 307 2...

Page 7: ...E VOLTS AC ELEMENTS EACH RATED MEASURED WATTS COMMERCIAL STORAGE TANK WATER HEATER MODEL NUMBER SERIAL NUMBER ITEM ID PART NUMBER WATTS TOTAL CAPACITY US GAL STANDBY LOSS MAX WORKING PRESSURE Low Lead...

Page 8: ...8 FEATURES AND COMPONENTS Figure 2 Electronic Control Modules Printed on 2 8 2018 9 05 AM CT...

Page 9: ...9 FEATURES AND COMPONENTS Figure 3 Surface Mount Control Models Printed on 2 8 2018 9 05 AM CT...

Page 10: ...ions will not result in damage to the area adjacent to the heater or to lower floors of the structure Close to the point of major hot water usage and the power supply Hot water piping and branch circu...

Page 11: ...ature are available Consult a qualified installer or service agency Follow all manufacturer s Instructions for installation of these valves Before changing the factory setting on the thermostat read t...

Page 12: ...ature pressure relief valve discharge line and 2 the water manually discharged will not cause any bodily injury or property damage because the water may be extremely hot If after manually operating th...

Page 13: ...shall not exceed 15 amperes for 14 AWG 20 amperes for 12 AWG and 30 amperes for 10 AWG copper or 15 amperes for 12 AWG and 25 amperes for 10 AWG aluminum and copper clad aluminum For dry locations onl...

Page 14: ...es control circuit fusing using two 3 amp class G fuses with 600 volt rating Do not substitute fuses of a different rating SEQUENCE OF OPERATION 1 When the control is powered the UIM should display mo...

Page 15: ...his table is to be used for 8 tap and 5 tap transformers Figure 4 Secondary Transformer Coil Table 5 Secondary Transformer Coil Configuration Volts Line On Load On 208 COMMON 208 SECONDARY 120V 240 CO...

Page 16: ...16 Figure 5 CCB Control Circuit Diagram Electronic Control Models WIRING DIAGRAMS Printed on 2 8 2018 9 05 AM CT...

Page 17: ...ing diagrams All heater circuits are designed for 60 50 hertz alternating current The water heater circuit wiring is 12 AWG AWM or TEW type rated 600 volts 105 C Fusing consists of three 30 amp fuses...

Page 18: ...llow wires to terminal L2 with red wires 4 Connect incoming power to terminals L1 and L2 CONVERSION TO THREE PHASE When heater is shipped for connection to a single phase electrical service it may be...

Page 19: ...ring diagrams All heater circuits are designed for 60 50 hertz alternating current The water heater circuit wiring is 12 AWG AWM or TEW type rated 600 volts 105 C Fusing consists of two 30 amp fuses f...

Page 20: ...res to terminal L2 with yellow wires 5 Connect incoming power to terminals L1 and L2 CONVERSION TO THREE PHASE When heater is shipped for connection to a single phase electrical service it may be conn...

Page 21: ...urn on the electrical disconnect switch 5 Observe the operation of the electrical components during the first heating cycle Use care as the electrical circuits are energized 6 Close the front panel Te...

Page 22: ...ECO activate the water temperature must drop below 140 F 60 C before the control system can be reset Once the water temperature has cooled below this point the power supply to the water heater must be...

Page 23: ...nt is adjusted to control water temperature This is an adjustable user setting in the control system s Temperatures Menu This and all control system menus are accessed through the UIM User Interface M...

Page 24: ...rmation Screen below shows the control system Desktop Screen This is the default screen If there are no active Fault or Alert conditions and no user input for approximately 10 minutes the control syst...

Page 25: ...sent heating elements the control system has not energized and is not sensing electrical current from Heating elements icon for a water heater equipped with 3 Banks of heating elements Each circle rep...

Page 26: ...rmit tent operational problems or when the customer has reset the control system prior to a service agent s arrival Fault Occurrence Running total of all Fault and Alert Conditions that have occurred...

Page 27: ...additional Bank of 3 heating elements OPERATING SEQUENCE With an Operating Set Point of 120 F and all Differential settings at 2 F the On Off sequencing of heating element Banks would be as follows B...

Page 28: ...current state of the ECO high temperature limit switch contacts The ECO switch is located inside the immersion Temperature Probe two red wires Enable Disable 1 2 Displays the current state open or clo...

Page 29: ...er In Economy Mode Displays whether the control system is currently operating in Economy Mode or not Daily Operating Mode Sun Mon Tue Wed Thu Fri Sat Seven daily sub menus are listed at the bottom of...

Page 30: ...nal Button underneath CHANGE to activate the adjustment mode for the Setpoint Adjustment value Use the Up Down buttons to change the Setpoint Adjustment to the desired value The SetpointAdjustment val...

Page 31: ...ANCEL when the adjustment mode is activated and how the current setting is outlined rather than highlighted in black Press the Operational Button underneath ACCEPT to enter and confirm the new setting...

Page 32: ...NGE buttons to enter the Mon sub menu Use the Up Down buttons to select highlight in black the Normal Operation Between setting Press the Operational Button underneath SELECT to change the operating m...

Page 33: ...current tank temperature drops below programmable Alarm SP Fault or Alert Used for external notification whenever a Fault or Alert condition is active Fault Used for notification whenever a Fault cond...

Page 34: ...story Menu This menu displays non adjustable operational information The control system records and stores the last 9 Fault and Alert messages in chronological order in this menu The most recent will...

Page 35: ...ment The heater tank is equipped with an anode rod to aid in corrosion control and should be inspected periodically see Anode Rod Inspection ANODE ROD INSPECTION Each water heater contains at least on...

Page 36: ...in operation Allow the water heater to complete several heating cycles to ensure it is operating properly SEDIMENT REMOVAL Water borne impurities consist of fine particles of soil and sand which settl...

Page 37: ...en the time required to heat water to the desired temperature 6 Look for hot water leakage 7 Sediment or pipe scale may be affecting water heater operation ABNORMAL SOUNDS 1 Sediment or lime scale acc...

Page 38: ...ening and valve to swab spud area Remove valve if leak is indicated and repair with pipe joint compound Water on the side of the tank may be condensation due to the panel or insulation not being in pl...

Page 39: ...n the system 3 Service valves are shown for servicing unit However local codes shall govern their usage COMMERCIAL ELECTRIC 1 UNIT LEGEND TEMPERATURE PRESSURE RELIEF VALVE PRESSURE RELIEF VALVE CIRCUL...

Page 40: ...be wired to and control the pump between the water heater s and the storage tank s 5 The water heater s operating thermostat should be set 5 degrees F higher than the Tank Temperature Control COMMERCI...

Page 41: ...ld be wired to and control the pump between the water heater s and the storage tank s 5 The water heater s operating thermostat should be set 5 degrees F higher than the Tank Temperature Control COMME...

Page 42: ...rvice valves are shown for servicing unit However local codes shall govern their usage COMMERCIAL ELECTRIC 2 UNITS LEGEND TEMPERATURE PRESSURE RELIEF VALVE PRESSURE RELIEF VALVE CIRCULATING PUMP TANK...

Page 43: ...the pump between the water heater s and the storage tank s 5 The water heater s operating thermostat should be set 5 degrees F higher than the Tank Temperature Control COMMERCIAL ELECTRIC 2 UNITS WITH...

Page 44: ...ol the pump between the water heater s and the storage tank s 5 The water heater s operating thermostat should be set 5 degrees F higher than the Tank Temperature Control COMMERCIAL ELECTRIC 2 UNITS W...

Page 45: ...for servicing unit However local codes shall govern their usage COMMERCIAL ELECTRIC 3 UNITS LEGEND TEMPERATURE PRESSURE RELIEF VALVE PRESSURE RELIEF VALVE CIRCULATING PUMP TANK TEMPERATURE CONTROL DRA...

Page 46: ...ter heater s and the storage tank s 5 The water heater s operating thermostat should be set 5 degrees F higher than the Tank Temperature Control COMMERCIAL ELECTRIC 3 UNITS WITH VERTICAL STORAGE TANK...

Page 47: ...water heater s and the storage tank s 5 The water heater s operating thermostat should be set 5 degrees F higher than the Tank Temperature Control COMMERCIAL ELECTRIC 3 UNITS WITH HORIZONTAL STORAGE T...

Page 48: ...er local codes shall govern their usage COMMERCIAL ELECTRIC 4 UNITS LEGEND TEMPERATURE PRESSURE RELIEF VALVE PRESSURE RELIEF VALVE CIRCULATING PUMP TANK TEMPERATURE CONTROL DRAIN FULL PORT BALL VALVE...

Page 49: ...rage tank s 5 The water heater s operating thermostat should be set 5 degrees F higher than the Tank Temperature Control COMMERCIAL ELECTRIC 4 UNITS WITH VERTICAL STORAGE TANK LEGEND TEMPERATURE PRESS...

Page 50: ...storage tank s 5 The water heater s operating thermostat should be set 5 degrees F higher than the Tank Temperature Control COMMERCIAL ELECTRIC 4 UNITS WITH HORIZONTAL STORAGE TANK LEGEND TEMPERATURE...

Page 51: ...fold Kits with Three Heaters Tank Capacity Gallons Part Number H W D A 52 100109232 66 1 4 91 3 4 27 1 4 13 1 4 80 100109232 70 1 2 95 1 4 31 1 4 9 3 4 120 100109232 73 1 4 99 1 2 35 3 4 5 1 2 Inlet a...

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A.O. Smith 52, Instruction Manual

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