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Hubbell Electric Heater Company T manual

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Table of contents for the manual

  • Page 1

    OPERATING AND MAINTENANCE MANUAL FOR COMMERCIAL INDIRECT POWERED WATER HEATER ELECTRIC HEATER COMPANY BASE MODEL “ T ”[...]

  • Page 2

    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 num ber and serial number when calling the factory. WARNING / CAUTION 1. Tank is to be complete ly fille d with water and a ll air is to be vente d bef[...]

  • Page 3

    3 TABLE OF C ONTENTS SECTION TITLE PAG E # I GENERAL DESCRI P TION AND CONSTRUCTI ON 5 I I INSTAL LATI ON 8 III S C H E D U LE D M A IN TE NANC E AND OPERATION 12 I V TROUBL ES HOOTING 15 V SERVICI NG AND REPLACEMENT OF PARTS 16 VI MI SCELL ANEOUS C HARTS AND FORMULAS 25[...]

  • Page 4

    4[...]

  • Page 5

    5 SECTION I - GENERAL DESCRIPTION AND CONST RUCTION GENERAL DESCRIPTION This book describes a packaged boiler water powered indirect water heater that is a stationary , self- contained unit. The complete assembly on a standard unit consists of the storage tank, immersion heating c oil, and an ASME rated combination tempe rature a nd pressure safety[...]

  • Page 6

    6 CONTROL THERMOS TAT The water heater is supplied with an immer sion thermostatic switch. The thermostat can be adjusted through a range of 120° - 140° F. OPTIONA L BACK- UP ELECTRIC HEATING SYSTEM Back-u p Electri c Heating E lement The water he ater may be supplied with an e lectric imme rsion heating element assembly( s). Ea ch assembly is fa[...]

  • Page 7

    7 Temperature Hig h Limit S witch As a safety device, either a surface mounted hig h temperature cut-off switch with manual reset, factory set at 190° F, or an immersion high temperature cut-off switch with manual reset, factory set at 180° F, may be provided. In the event of an over-temperature condition, the thermostat will diseng age the power[...]

  • Page 8

    8 SECTION II – INSTALLATION WARNING / CAUTION DO NOT TURN ON THE BOI LER WATER SUPPL Y to this equipment until heater is completely filled with water and all air has be en rele ased. If the heate r is NOT filled with water when the power is turned on, damage to the heating coil may result. For protection against excessive pressures and temperatur[...]

  • Page 9

    9 PIP ING INSTALLATION NOTE: The most effect ive means for preventing deteriorat ion from accelerated corrosi on due to galva nic and stray curre nt is the installation of dielectric fittings/unions. The installation of these fittings is the responsibility of the installing contractor. 1. All integral components have been properly sized to meet des[...]

  • Page 10

    10 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 Install 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 floo[...]

  • Page 11

    11 ELECTRICAL IN STALLATION 1. Connect electr ical wiring from boiler c ontrols and circ ulator pump to immersion ther mostat. 2. If supplied with a back-up el ectric heating elem ent; enter electri c enclosure with properl y sized feeder leads. Be sure to properly ground the water heater. I nstall these power leads into the box lugs on the termina[...]

  • Page 12

    12 SECTION III - SCHEDULED MAINTE NANCE AND OPERATION WARNING / CAUTION Before performing any maintenance procedure, make certain boiler water and electric supply is OF F 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 o[...]

  • Page 13

    13 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.[...]

  • Page 14

    14 SECTION IV – TROUBLESHOOTING Symptom Probable Cause Corrective Action / Remedy T u b es a r e f o u l e d . C l e a n t u b e s p er S e c t i o n III, a nnual scheduled maintenance. Gradual loss of heating capacity. Excess silt in bottom of tank. Drain and flush tank per Section III , annual scheduled maintenance. Ruptured tube(s) in heating [...]

  • Page 15

    15 BACK -UP ELECTRCIAL HEATER SYSTEM (if supplied) Symptom Probable Cause Corrective Action / Remedy Circuit breaker tripped at source. Reset circuit breaker. High limit switch tr ipped. Reset hig h limit switch. Loose wires. Tighten wires. Torque screws per torque chart included in Section VI . Heating element inoperable. Ch eck he ati ng e le men[...]

  • Page 16

    16 SECTION V - SERVICING & REPLACEMENT OF PARTS WARNING / CAUTION Before servicing or replacing any part make sure to turn the power supply switch to the OF F position. RELIEF VALVE 1. Disconnect power from unit. 2. Shut off incoming water and boiler water supply . 3. Lift test lever on relief valve to relieve pressure in tank. 4. Disconnect ov[...]

  • Page 17

    17 HEATING COIL 1. Disconnect power from unit. 2. Shut off incoming cold and boiler 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 outgoing water line. 5. Drain water from tank. 6. Disconnect supply and return lines from heating coil. 7. Remove bolts secur in[...]

  • Page 18

    18 SURFACE TEMPERATURE HIGH LIMIT CUT-OFF (if supp lied) 1. Disconnect power from unit. 2. Remove access cover. 3. Disconnect the four (4) 14 gauge wires or three (3) 14 g auge wires and a jumper, as required. Control Wires 4. Remove the two (2) mounting screws or disconnect from thermostat, as required. 5. Replace control and install new high limi[...]

  • Page 19

    19 IMMERSION TEMPERATURE HIGH LIMIT CUT-OFF (if supplied) 1. Disconnect power from unit. 2. Remove access cover. 3. Remove high limit c over screw and cover. Cover Cover Screw Reset Tab 4. Disconnect the two (2) 14 gauge wires. Wires Capillary Tube 5. Remove capilla ry tube a nd bulb from thermowell 6. Remove two (2) mounting screws. Mounting Screw[...]

  • Page 20

    20 HEATING ELEMENT (if supplie d) 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 outgoing water line. 5. Drain water from tank. 6. Disconnect the wires from the heating elem ent terminal s. Tank Flange Wires[...]

  • Page 21

    21 2 L 1 L 2 L 3 L 1 L 2 Single Element Operation 3 Ø O p e n D e l t a W i r i n g f o r S i m u l t a n e o u s O p e r a t i o n 4 3 2 1 1 2 1 2 3 4 1 1 3 4 2 1 2[...]

  • Page 22

    22 L 1 L 2 L 1 L 2 I nterlocked for Non-Simultaneous Operation Non-I nterlocked for Simultaneous Operation 1 1 1 1 2 2 2 2 3 3 4 4 4 4 1 1 2 2[...]

  • Page 23

    23 SURFACE MOUNTED THERMOS TAT (if sup plied) 1. Disconnect power from unit. 2. Remove access cover and locate t hermostat. 3. Disconnect the two (2) or three (3) 14 gauge wires and jumpers, as required. Control Wires 4. Remove two (2) mounting screws and disconnect fr om high limit cut- off, if re quired. Mounting Screws 5. Replace thermost at usi[...]

  • Page 24

    24 IMMERSION THERMOSTAT ( if supplied) 1. Disconnect power from unit. 2. Remove access cover and locate t hermostat. 3. Remove high limit c over screw and cover. Cover Cover Screw 4. Disconnect the two (2) or three (3) 14 gauge wires, as required. Wires Capillary Tube 5. Remove capilla ry tube a nd bulb from thermowell. 6. Remove two (2) mounting s[...]

  • Page 25

    25 SECTION VI – MISCELL ANEOUS CHARTS AND FORMULAS FORMULAS[...]

  • Page 26

    26 T Model – Coil Curves[...]