Hubbell Electric Heater Company " SE " User's Manual
Contents
1. 17 HEATING ELEMENT 1 2 3 4 Lift manual release lever on relief valve to let air into system break union on outgoing ON 8 9 Disconnect power from unit Shut off incoming water supply Attach hose to drain connection water line Drain water from tank Disconnect the wires from the heating element terminals Remove the 3 8 16 nuts Tank Flange Nuts Withdraw element assembly and remove gasket Gasket Element Assembly Install new gasket and insert new heating element 10 Rewire element according to the voltage and phase rating of the unit as shown below 11 Fill tank and check around gasket for any leaks 18 JUMPER CONFIGURATION PHASE 208 OR 240 VOLT or 2 5 Ri l 3 PHASE WYE 380 575 VOLT 3 PHASE DELTA 208 OR 240 VOLT 2 Se SURFACE MOUNTED THERMOSTAT 1 Disconnect power from unit 2 Remove access cover and locate thermostat 3 Disconnect the two 2 14 gauge wires 4 Remove two 2 mounting screws Mounting Screws 5 Replace thermostat using the reverse procedure 20 IMMERSION THERMOSTAT 1 Disconnect power from unit 2 Remove access cover and locate thermostat 3 Remove high limit cover screw and cover Cover Cover Screw 4 Disconnect two 2 14 gauge wires Wires2. TANK CONNECTIONS The heater is supplied with separate cold water and hot water connections Water entering the cold water inlet is deflected by means of a baffle within the tank The hot water outlet includes a built in heat trap to prevent hot water from radiating out from the heater A 7 inch FNPT connection is located on the side of the heater for mounting a combination safety temperature and pressure relief valve An overflow line should be installed from the relief valve outlet a floor drain GHT connection is supplied for draining See drawing for locations and sizes HEATING ELEMENT The water heater is supplied with an electric immersion heating element assembly s composed of incoloy sheathed elements that are brazed into a brass flange Each assembly is fastened to a corresponding tank flange using a gasket and four 4 3 8 16 x 1 inch long hex head steel bolts and nuts See drawing for voltage and power ratings CONTROL THERMOSTAT The water heater is supplied with either a surface mounted or immersion thermostatic switch that is installed and wired at the factory See drawing for specific details The surface mounted thermostat can be adjusted through a range of 110 170 F The immersion thermostat can be adjusted through a range of 100 190 F Both thermostats are adjustable with a flat tip screwdriver Surface Mounted Thermostat Immersion Thermostat TEMPERATURE HIGH LIMIT SWITCH As a safet
3. 5 Remove capillary tube and bulb from thermowell 6 Remove two 2 mounting screws Mounting Screws 7 Replace thermostat using reverse procedure Note Be sure to place capillary tube into slot in base prior to installing cover Capillary Tube 21 MAGNETIC CONTACTOR 1 Disconnect power from unit 2 Disconnect line and load wires to contactor 3 Disconnect two 2 14 gauge 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 contactor using reverse procedure 22 RELIEF VALVE 1 00 Overflow Piping Outlet Disconnect power from unit Shut off incoming water supply Lift test lever on relief valve to relieve pressure in tank Disconnect overflow piping Unscrew relief valve remove assembly and replace with new one Connect overflow piping Turn on incoming water supply and check for leaks Turn safety switch to ON position Test Tank Connection Temperature Probe 23 SECTION MISCELLANEOUS CHARTS AND FORMULAS ELEMENT CHART Element Immersion Resistance Ohms Part Length 216 72 216 145 1794 57 171 15 13 14 48 96 _5 91 30 91 61 FORMULAS RECOVERY METRIC CONVERSION GPH x FAT x 0 00244 KW Liters x 0 2641 Gallons
4. KW x 410 GPH OF AT Gallons x 3 79 Liters Kw 446 k AT Gallons x 0 003785 ms ms x 264 2 Gallons Note 1 KW will heat 4 1 GPH at 100 F AT 1 C AT 1 8 F AT oP 18 82 ELECTRICAL C F 32 x 0 556 KW x 1000 psi x 0 06896 Bar X 1 73 Volts 3 Amps Bar x 14 5 psi psi x 6 86 kPa KW x 1000 eS Amps 1 0 1456 Lbs x 0 4536 Kg Kg x 2 2 Lbs Watts Sq Cm x 6 4 Watts Sq In Watts Sq In x 0 155 Watts Sq Cm 24 TORQUE VALUES SILICON ALUMINU 18 8 S S BRASS S S BOLT SIZE BRONZE 2024 or HR Se JG 2435 ripe ao mo so so 18 132 107 13 516 24 142 16 131 _ 86 5818 3110 2545 2885 195 3250 370 23
5. OPERATING AND MAINTENANCE MANUAL FOR COMMERCIAL ELECTRIC WATER HEATER Fuel ELECTRIC HEATER COMPANY BASE MODEL SE HUBBELL ELECTRIC HEATER COMPANY P O BOX 288 STRATFORD CT 06615 PHONE 203 378 2659 FAX 203 378 3593 INTERNET l http www hubbellheaters com IMPORTANT Always reference the full model number and serial number when calling the factory WARNING CAUTION Tank is to be completely filled with water and all air is to be vented before energizing Due to the rigors of transportation all connections should be checked for tightness before heater is placed in operation Safety relief valve must be installed in tapping provided The refractory material used in heating elements may absorb some moisture during transit periods of storage or when subjected to a humid environment This moisture absorption results in a cold insulation resistance of less than twenty 20 megohms If this heater has been subjected to the above condition each heating element must be checked for insulation resistance before energizing A low megohm condition can be corrected by removing the terminal hardware and baking the element in an oven at 350 F 700 F for several hours or until the proper megohm reading is obtained KEEP AWAY FROM LIVE ELECTRICAL CIRCUITS Do not perform any maintenance make any adjustments or replace any components inside the control panel with the high voltage power supply turned on Und
6. OPERATION The water heater is automatic in its operation It will maintain a full tank of water at the temperature setting of the thermostat The water heater should not be turned on without first making sure that the tank is full of water and that all air has been released FREEZING The tank should be fully drained in the event the electricity has been turned off and if there is danger of freezing QUARTERLY INSPECTION 1 Monitor thermostat Let water heater completely heat to a designated thermostat setting After thermostat satisfies that is when the thermostat actually clicks off draw water from heater Compare water temperature of drawn water to the temperature setting of the thermostat when it satisfies Normal variation between the two points is approximately 5 F If these two readings do not coincide within acceptable tolerances and verification has been made of the accuracy of the temperature reading gauge replace the thermostat 2 Lift test lever on relief valve and let water run through valve for a period of approximately 10 seconds This will help flush away any sediment that might build up in water passageways 3 Inspect element flange for leakage as follows ao Shut off Power Supply Remove element housing cover Visually inspect heating element gasket for evidence of leaks Rub finger around gasket that is between the heating element and tank flange for any evidence of moisture If moisture is pres
7. a low water situation and disengage the operating coils in the magnetic contactor s Once the condition is remedied the low water cut off switch is automatically reset Low Water Cut Off Probe Low Water Cut Off Relay Fused Low Voltage Transformer A fused low voltage transformer may be supplied This option is used to step down higher voltages to 120 volt for the control circuit Latha SUOT Bos rear cu 105 C m 2 mews S BOSOBTZ13JK 704 47 0908 is 20 0 24552 2 Dial Temperature and Pressure Gauge A combination temperature 70 250 and pressure 0 200 psi gauge with 2 inch dial may be supplied for in line installation shipped loose or factory installed in the tank 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 system The valve will be shipped loose for in line installation Instructions for installation are provided with the valve On Off Switch A built in non fused On Off disconnect switch may be supplied with the control panel to disconnect power to the control panel control and power circuit wiring Individually Fused Elements To prevent the possibility of damage to circuits and elements in case of electrical overloads fuses may be supplied for each circuit Two types of fuses may be used a type NON f
8. ent or a water drip is observed follow procedure outlined in Section V 4 Check for loose electrical connections Tighten as necessary 12 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 Let water run for 3 4 minutes e Close drain valve f Open hot water valve g Turn power supply ON 13 SECTION IV TROUBLESHOOTING Symptom Probable Cause Corrective Action Remedy No hot water Circuit breaker tripped at source Reset circuit breaker On Off switch in OFF position if installed Turn switch to ON position Circuit breaker at control cabinet tripped if installed Reset circuit breaker Blown fuse in element fuse Replace fuse block if installed Blown fuse in transformer if Replace fuse installed High limit switch tripped Reset high limit switch Loose wires Tighten wires Torque screws per torque chart included in Section VI Heating element inoperable Check heating element operation by clamping an Amprobe around each wire to the element The ampere reading should agree with the nameplate AMP figure Low line voltage Have source electrical system checked by an electrician Faulty ther
9. er certain circumstances dangerous potentials may exist even when the power supply is off To avoid casualties always turn the power supply safety switch to off turn the charge or ground the circuit before performing any maintenance or adjustment procedure The unit is designed to operate at pressure not more than 150 psi Generalized instructions and procedures cannot anticipate all situations For this reason only qualified installers should perform the installations A qualified installer is a person who has licensed training and a working knowledge of the applicable codes regulation tools equipment and methods necessary for safe installation of an electric resistance water heater If questions regarding installation arise check your local plumbing and electrical inspectors for proper procedures and codes If you cannot obtain the required information contact the company TABLE CONTENTS SECTION TITLE GENERAL DESCRIPTION AND CONSTRUCTION INSTALLATION SCHEDULED MAINTENANCE AND OPERATION TROUBLESHOOTING SERVICING AND REPLACEMENT OF PARTS MISCELLANEOUS CHARTS AND FORMULAS PAGE 10 12 14 10 24 MODEL SE DIMENSIONAL DATA T amp P Relief Valve Hot Water Inlet and Drain Outlet Top View 8 Hot Water Outlet d T amp P Relief Valve e Tank Cross Electrical Section Control Panel 2 Insulation Protective Jacket Thermostat Sensor Heatin
10. g Elements one two or three Withdrawal Space Combination Cold Water Inlet And Drain With Diffuser Front View Side View SECTION I GENERAL DESCRIPTION AND CONSTRUCTION GENERAL DESCRIPTION This book describes a packaged electric water heater that is a stationary self contained unit The complete assembly consists of the storage tank immersion electric heating element s thermostat safety relief valve safety high temperature cut out magnetic contactor s and any other required electrical operating control Optional equipment may be supplied with your unit Please consult the product drawing for details specific to your assembly The unit is factory assembled insulated jacketed wired tested and ready for electrical and plumbing service connections CONSTRUCTION TANK Standard Tank Construction The standard storage tank is constructed of steel and internally lined with specially formulated Hydrastone cement to a 7 inch minimum thickness The tank is designed for a maximum allowable working pressure of 150 psi 300 psi TP Optional Tank Construction Optionally the storage tank may be constructed of all welded solid copper silicon alloy ASTM B 96 or type 316L stainless steel for maximum tank longevity For these options no internal lining is required due to the non ferrous materials used in the construction of the pressure vessel The tank is designed for a maximum allowable working pressure of 150 psi 300psi TP
11. mostat Move thermostat dial through full range A definite click should be heard If not replace thermostat Faulty low water cut off if installed Check to see if tank is full of water If not fill tank If problem continues and tank is full check for continuity between the common and normally open contact of the relay board If continuity is not observed replace low water cut off Magnetic contactor does not energize Replace complete magnetic contactor Because of the design of this particular contactor it is more desirable to replace complete control rather than rebuilding coil contacts and springs etc 14 Water temperature below settings at all times Faulty thermostat Check thermostat adjustment Monitor thermostat as described in Section Quarterly Inspection Replace if necessary Blown fuse in element fuse block if installed Replace fuse Heating element 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 comparing with the chart included in Section VI Heater improperly sized Verify heater is properly sized for the flow rate and temperature rise of your system See formulas included in Section VI Replace elements with proper size as necessary Relief valve discharges continuously Excessive temperature or pressure in tank Tem
12. or voltages less than 250 volt or type JJS for voltages less than 600 volt Built in Circuit Breaker A built in circuit breaker may be provided with or without shunt trip protection for protection from circuit overload Horizontal Construction The unit can be designed for horizontal installation either ceiling hung or base mounted Building Management System BMS Building Management System control package may be supplied for remote operation and alarm capabilities Electro Mechanical Timer An electro mechanical 7 day time clock with battery back up may be supplied for specific timing operations set of instructions will be supplied with the timer SECTION II INSTALLATION WARNING CAUTION DO NOT TURN ON THE ELECTRIC POWER SUPPLY to this equipment until heater is completely filled with water and all air has been released If the heater is NOT filled with water when the power is turned on the heating elements will burn out For protection against excessive pressures and temperatures local codes require the installation of a temperature and pressure T amp P relief valve certified by a nationally recognized laboratory that maintains periodic inspection of production of listed equipment of materials as meeting the requirements for Relief Valves and Automatic Gas Shutoff for Hot Water Supply Systems ANSI Z21 22 1971 THE CUSTOMER IS RESPONSIBLE TO PROTECT PROPERTY AND PERSONNEL FROM HARM WHEN THE VALVE FUNCTIONS All
13. perature and pressure relief valves are made to operate if the water temperature exceeds 210 F or water pressure exceeds the pressure rating of the safety relief valve If trouble is excessive temperature then thermostat is not shutting off at the right setting and thermostat must be replaced 15 SECTION SERVICING amp 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 mounting screws Mounting Screws 5 Replace control and install new high limit switch by performing above steps in reverse order See wiring diagram included with drawing for assistance 16 IMMERSION TEMPERATURE HIGH LIMIT CUT OFF 1 Disconnect power from unit 2 Remove access cover 3 Remove high limit cover screw and cover Cover Screw gt Reset Switch ___ St 4 Disconnect the two 2 14 gauge wires Capillary Tube 5 Remove capillary tube and bulb from thermowell 6 Remove two 2 mounting screws Mounting Screws 7 Remove control and install new high limit switch by performing above steps in reverse order Note Be sure to place capillary tube into slot in base prior to installing cover
14. t to floor drain I Install into provided tapping Manual Release Lever Temperature and Pressure Relief Valve Temperature Probe 5 Install a relief valve overflow pipe to a nearby floor drain CAUTION No valve of any type should be installed between the relief valve and tank or in the drain line FILLING THE HEATER 1 Completely close the drain valve 2 Open the highest hot water faucet to allow all air to escape from piping 3 Open the valve to the cold water inlet and allow the heater and piping system to completely fill as indicated by a steady flow of water from the open faucet ELECTRICAL INSTALLATION 1 Enter electric enclosure with properly sized feeder leads Be sure to properly ground the water heater 2 Install these power leads into the box lugs on the terminal block or magnetic contactor 3 Torque screws per torque chart included in Section VI 4 All other electrical connections are made at the factory therefore no other electrical connections are necessary FINAL CHECKS 1 Check all connections for tightness 2 Ensure that all the above steps are completed 3 After the water is heated for the first time monitor the water temperature as described in Section III Quarterly Inspection 11 SECTION III SCHEDULED MAINTENANCE AND OPERATION WARNING CAUTION Before performing any maintenance procedure make certain power supply is OFF and cannot accidentally be turned on MAINTENANCE AND
15. water heaters have a risk of leakage at some unpredictable time IT IS THE CUSTOMER S RESPONSIBILITY TO PROVIDE A CATCH PAN OR OTHER ADEQUATE MEANS SO THAT THE RESULTANT FLOW OF WATER WILL NOT DAMAGE FURNISHINGS OR PROPERTY WATER HEATER PLACEMENT 1 Place the heater on a solid foundation in a clean dry location nearest to the point of most frequent hot water use If the heater is to be raised off the floor the entire bottom of the heater should be supported by a solid surface 2 The water heater should be protected from freezing and waterlines insulated to reduce energy and water waste 3 Leave a minimum of 18 clearance for element withdrawal if necessary 4 Do not install in an area where flammable liquids or combustible vapors are present PIPING INSTALLATION NOTE The most effective means for preventing deterioration from accelerated corrosion due to galvanic and stray current is the installation of dielectric fittings unions The installation of these fittings is the responsibility of the installing contractor 1 Connect the cold water inlet and hot water outlet to the appropriate connections as shown refer to the drawing for location and sizes 2 Install in line vacuum breaker if supplied 3 Install in line pressure and temperature gauge if supplied 4 Install the combination temperature and pressure safety relief valve in the tapping provided Note that this is required by law for safety considerations 10 Outle
16. y device either a surface mounted high 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 is provided In the event of an over temperature condition the thermostat will disengage the operating coils in the magnetic contactor s The high limit must be manually reset thereafter to restart the heater Surface Mounted High Temperature Cut Off Switch Immersion High Temperature Cut Off Switch MAGNETIC CONTACTOR The magnetic contactor s is a heavy duty resistive load type rated for 100 000 cycles The contactor supplies power to the heating element s and is sized based on the resistive load non inductive rating of the circuit The contactor supplies power only when the thermostatic switch is engaged thereby pulling in the contacts until the desired temperature is reached At this point the contacts will drop out which in turn disconnects power from the elements Cutler Hammer 25 50 OUTER SHELL AND INSULATION The tank is encapsulated in 2 inch thick polyurethane foam insulation The insulation is protected by a high impact non corroding colorized composite protective jacket OPTIONS The following optional features may be included in your water heater Reference included drawing specific to your heater for further details Low Water Cut Off Used as a safety device the electronic low water cut off is used to detect
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