Hubbell Electric Heater Company V20 manuale d’uso

OPERATING AND MAINTENANCE MANUAL FOR ELECTRIC INDUSTRIAL PROCESS WATER HEATER ELECTRIC HEATER COMPANY BASE MODEL “ V10 and V20 ”[...]

2 HUBBELL ELECTRIC HEATER COMPANY P.O. BOX 288 STRATFORD, CT 06615 PHONE: (203) 378-2659 FAX: (203) 378-3593 INTERNET: http://www.hubbellheaters.com/ -- IMPORTANT -- Always reference the f ull model number and serial num ber when calling the factory. WARNING / CAUTION 1. Tank is to be complete ly filled with water and all a ir is to be vented befor[...]

3 TABLE OF CONTENTS SECTION TITLE PAG E # I GENERAL DESCRI PTION AND CONSTRUCTION 5 II I NSTALL ATI ON 10 III S C H E D U LE D M A IN T E NANCE AND OPERATION 16 I V TROUBLESHOOTI NG 18 V S E R V I C I N G & R E P L A C E M E N T O F P A R T S 2 0 VI MI SCELLANEOUS CHARTS AND FORMULAS 26[...]

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5 SECTION I - GENERAL DESCRIPTION AND CONST RUCTION GENERAL DESCRIPTION This booklet describes an electric water heater designed for use in an industrial or commercial application. The complete assembly consists of the storage tank, immersion electric heating element(s), thermostat, safety relief valve, safety high temperature cut out, ma gnetic co[...]

6 CONTROL THERMOS TAT The water heater is supplied with a single stage immersion the rmostatic switch that i s install ed and wired at the factory. The thermostat can be adjusted through a range of 100° - 195° F, (an optional low range, 30° - 110° F, is available), and is adjustable with a flat tip screwdriver. Other thermostati c controls are [...]

7 OUTER SHELL, INSULATION, AND SUPP ORTS The tank is encapsulated in 2-inches of high-density fiberg lass insulation. The protective shell is constructed of galvaneel and is coated with a durable silver hammertone finish. Heavy gaug e steel support legs are provided. OPTIONS The following optional features may be included in y our water heater. Ref[...]

8 Dial Temperature an d Pressure Gauge A combination temperature (70° - 250° F) and pressure (0 – 200 psi) gaug e with 2½-inch dial may be supplied for in- line installation (shipped loose). Vacuum Relief Valve A vacuum relief valve may be provided with the unit to reduce the risk of back siphonage and back pressure of the sy stem. The valve w[...]

9 Building Management System (BMS) A Building Manag ement Sy stem control package may be supplied for remote operation and alarm capabilitie s. Pump Interlock Term inal Block An optional pump interlock terminal block may be installed to prevent energizing when the pump is not running. Silicon Control Re ctifier A silicon control rectifier (SCR) “[...]

10 SECTION II – INSTALLATION WARNING / CAUTION DO NOT TURN ON THE ELECTRI C POWER SUPPLY to this equipment until he ater is completely fille d with water and all air has been relea sed. If the heater is NOT fille d with water when the power is turned on, the heating elements will burn out. For protection against excessive pressures and temperatur[...]

11 4. I nstall the combination temperature and pressure safety relief valve in the tapping provided. Note that this is required by law for safety considerations. Outlet to floor drain I nstall into provided tapping Manual Release Lev e r Temperature Probe Temperature and Pressure Relief Valve 5. I nstall a relief valve overflow pipe to a nearby flo[...]

12 FINAL CHECKS 1. Check all connections for tightness. 2. Ensure that all the above steps are completed 3. After the wa ter is heated for the first time, monitor the water te mperature as de scribed in S e c t i o n III, Q u a r t e r l y In s p e c t i on. Outgoing Hot Water I ncoming Cold Wate r 1 – V Model Water Heater 2 – Pressure and Temp[...]

13 1 – Terminal Block 2 – Magnetic Contactor 3 – Heating Element 4 – Low Water Cut-Off, if supplied 5 – Transformer, 480-Volt/240-Volt, installed on 480-Volt models with low water cut-off only 6 – High-Te mperature L imit Switch 7 – Control Thermostat[...]

14 1 – Terminal Block 2 – Magnetic Contactor 3 – Heating Element 4 – Low Water Cut-Off, if supplied 5 – Transformer, 480-Volt/240-Volt, installed on 480-Volt models with low water cut-off only 6 – High-Te mperature L imit Switch 7 – Control Thermostat[...]

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16 SECTION III - SCHEDULED MAINTE NANCE AND OPERATION WARNING / CAUTION Before performing any maintenance procedure, make certain power supply is OFF and cannot accidentally be turned on. MAINTENANCE AND OPERATION The water heater is automatic in its operation. I t will maintain a full tank of water at the temperature setting of the thermostat. The[...]

17 ANNUAL INSPECTION 1. Flush tank as follows a. Shut off power supply . b. Close valve on hot water outlet piping. c. Open valve on drain piping. d. Cold water inlet line pressure will be strong enough to flush sediment from the bottom of the tank out through the drain. L et water run for 3-4 minutes. e. Close drain valve. f. Open hot water valve.[...]

18 SECTION IV – TROUBLESHOOTING Symptom Probable Cause Corrective Action / Remedy Circuit breaker tripped at source. Reset circuit breaker. Blown fuse in transformer, if installed. Replace fuse. Circuit breaker at control cabinet tripped, if installe d. Reset circ uit breaker. Blown fuse in element fuse block, if installed. Replace fuse. High lim[...]

19 Faulty thermosta t. Check thermostat adjustment. Monitor thermostat as described i n S e c t i o n III, Q u a r t e r l y I nspection. Replace if necessary. Heating e lement not working on all phases Check to see that heating element is working on all phases, by checking the resistance (ohms) value for each element and c omparing with the chart [...]

20 SECTION V - SERVICING & REPLACEMENT OF PARTS WARNING / CAUTION Before servicing or replacing any part make sure to turn the power supply switch to the OFF position. SURFACE TEMPERATURE HIGH LIMIT CUT -OFF 1. Disconnect power from unit. 2. Remove access cover. 3. Disconnect the four (4) 14 gauge wires. Control Wires 4. Remove the two (2) moun[...]

21 IMMERSION TEMPERATURE HIGH L IMIT CUT-OFF 1. Disconnect power from unit. 2. Remove access cover. 3. Remove high limit c over screw and c over. Cover Cover Screw Reset Switch 4. Disconnect the two (2) 14 gauge wires. Wires Capillary Tube 5. Remove capilla ry tube and bulb from ther mowell 6. Remove two (2) mounting screws. Mounting Screws 7. Remo[...]

22 HEATING ELEM ENT 1. Disconnect power from unit. 2. Shut off incoming water supply . 3. Attach hose to drain connection. 4. Lift manual release lever on relief valve to let air into sy stem or break union on outg oing water line. 5. Drain water from tank. 6. Disconnect the wires from the heatin g element terminal s. 7. Remove the 3/8-16 nuts. Tan[...]

23 IMMERSION THE RMOSTAT 1. Disconnect power from unit. 2. Remove access cover and locate t hermostat. 3. Remove high limit c over screw and c over. Cover Cover Screw 4. Disconnect the two (2) 14 gauge wires. Wires Capillary Tube 5. Remove capilla ry tube and bulb from thermowe ll. 6. Remove two (2) mounting screws. Mounting Screws 7. Replace therm[...]

24 MAGNETIC CONTACTOR 1. Disconnect power from unit. 2. Disconnect line and load wires to contactor. 3. Disconnect two (2) 14 gaug e control circuit wires. Control Wires Line Wires Load Wires 4. Loosen two (2) holding screws and remove contactor. Mounting Screws (Bottom screw not shown) 5. Replace with new cont actor using reverse procedure.[...]

25 RELIEF VALVE 1. Disconnect power from unit. 2. Shut off incoming water supply . 3. Lift test lever on relief valve to relieve pressure in tank. 4. Disconnect overflow piping. 5. Unscrew relief valve, remove assemb ly and replace with new one. 6. Connect overflow piping. 7. Turn on incoming water supply and check for leaks. 8. Turn safety switch [...]

26 SECTION VI – MISCELL ANEOUS CHARTS AND FORMULAS ELEMENT CHA RT Power (kW) Resistance (Ohms) Element Part # 208V 240V 480V I mmersion L ength Hairpin 1 Φ 3 Φ DELTA 3 Φ WYE CH-FO 608 6 ---- ---- 13 3/8" 7.2 7.2 ---- ---- CH-FO 604 4.5 6 ---- 13 3/8" 9.6 9.6 ---- ---- 4-38683N 4 5 6 13" 34.4 11.5 34.4 23.0 5-38683N 5 6 8 13"[...]

27 TORQUE VALUE S BOLT SIZE 18-8 S/S IN. - LB S . BRASS IN. - LB S . SI LI CON BRONZE IN. - LB S . ALUMI NUM 2024-T4 IN. - LB S . 316 S/S IN. - LB S . MONEL IN. - LB S . 4-40 5.2 4.3 4.8 2.9 5.5 5.3 4-48 6.6 5.4 6.1 3.6 6.9 6.7 5-40 7.7 6.3 7.1 4.2 8.1 7.8 5-44 9.4 7.7 8.7 5.1 9.8 9.6 6-32 9.6 7.9 8.9 5.3 10.1 9.8 6-40 12.1 9.9 11.2 6.6 12.7 12.3 8[...]