OPERATING AND MAINTENANCE MANUAL FOR MARINE ELECTRIC WATER HEATER ELECTRIC HEATER COMPANY BASE MODEL “ MSE ”
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 full model number and serial number when calling the factory. WARNING / CAUTION 1. Tank is to be completely filled with water and all air is to be vented before energizing. 2. Due to the rigors of transportation, all connections should be checked for tightness before heater is placed in operation. 3.
TABLE OF CONTENTS SECTION TITLE PAGE # I GENERAL DESCRIPTION AND CONSTRUCTION 5 II INSTALLATION 10 III SCHEDULED MAINTENANCE AND OPERATION 14 IV TROUBLESHOOTING 16 V SERVICING AND REPLACEMENT OF PARTS 18 VI MISCELLANEOUS CHARTS AND FORMULAS 26 ABS TYPE APPROVAL PROGRAM 28 VII 3
SECTION I - GENERAL DESCRIPTION AND CONSTRUCTION GENERAL DESCRIPTION This book describes a packaged electric water heater, approved by ABS Americas (A Division of the American Bureau of Shipping) and the USCG (United States Coast Guard), which is a stationary, self contained unit and is designed and constructed specifically for marine applications on board a surface vessel.
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.
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.
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. Dial Temperature and Pressure Gauge A combination temperature (70° - 250° F) and pressure (0 – 200 psi) gauge with 2½-inch dial may be supplied for in-line installation (shipped loose) or factory installed in the tank.
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 for voltages less than 250volt or type JJS for voltages less than 600-volt.
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.
Mounting Dimensions Tank Diameter “A” 16 16 16 16 18 3/4 22 22 24 24 Overall Diameter “B” 20 20 20 20 22 3/4 26 26 28 28 Bolt Circle “C” 12 12 12 12 16 16 16 18 18 Bulkhead Mounting Dimension “D” None None None 12 12 12 12 12 12 Gallon Capacity 10 20 30 40 50 65 80 100 120 11
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.
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.
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 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.
ANNUAL INSPECTION 1. Flush tank as follows a. b. c. d. Shut off power supply. Close valve on hot water outlet piping. Open valve on drain piping. 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.
SECTION IV – TROUBLESHOOTING Symptom No hot water Probable Cause Circuit breaker tripped at source. On/Off switch in ‘OFF’ position, if installed. Circuit breaker at control cabinet tripped, if installed. Blown fuse in element fuse block, if installed. Blown fuse in transformer, if installed. High limit switch tripped. Corrective Action / Remedy Reset circuit breaker. Loose wires. Tighten wires. Torque screws per torque chart included in Section VI.
Water temperature below settings at all times Faulty thermostat. Blown fuse in element fuse block, if installed. Heating element not working on all phases Heater improperly sized Relief valve discharges continuously Excessive temperature or pressure in tank Check thermostat adjustment. Monitor thermostat as described in Section III, Quarterly Inspection. Replace if necessary. Replace fuse.
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) mounting screws. Mounting Screws 5. Replace control and install new high limit switch by performing above steps in reverse order.
IMMERSION TEMPERATURE HIGH LIMIT CUT-OFF 1. Disconnect power from unit. 2. Remove access cover. 3. Remove high limit cover screw and cover. Cover Cover Screw Reset Switch 4. Disconnect the two (2) 14 gauge wires. 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.
HEATING ELEMENT 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 system or break union on outgoing water line. 5. Drain water from tank. 6. Disconnect the wires from the heating element terminals. 7. Remove the 3/8-16 nuts. Tank Flange Element Terminals Nuts 8. Withdraw element assembly and remove gasket. Gasket Element Assembly 9. Install new gasket and insert new heating element. 10.
SURFACE MOUNTED THERMOSTAT 1. Disconnect power from unit. 2. Remove access cover and locate thermostat. 3. Disconnect the two (2) 14 gauge wires. Control Wires 4. Remove two (2) mounting screws. Mounting Screws 5. Replace thermostat using the reverse procedure.
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 the two (2) 14 gauge wires. Wires Capillary Tube 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.
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.
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 assembly and replace with new one. 6. Connect overflow piping. 7. Turn on incoming water supply and check for leaks. 8. Turn safety switch to ON position.
SECTION VI – MISCELLANEOUS CHARTS AND FORMULAS ELEMENT CHART Element Part # 2-38683N 3-38683N 4-38683N 5-38683N 6-38683N 7-38683N 8-38683N 9-38683N 10-38683N 11-38683N FORMULAS 26 Immersion Length 13" 13" 13" 13" 13" 13" 13" 15" 15" 15" Hairpin 57.6 43.2 34.4 27.9 21.6 17.1 14.4 12.1 9.1 7.5 Resistance (Ohms) 1Φ 3 Φ DELTA 19.2 57.6 14.4 43.2 11.5 34.4 9.3 27.9 7.2 21.6 5.7 17.1 4.8 14.4 4.0 12.1 3.0 9.1 2.5 7.5 3 Φ WYE 38.6 28.9 23.0 18.7 14.5 11.5 9.6 8.1 6.1 5.
TORQUE VALUES BOLT SIZE 18-8 S/S IN.-LBS. BRASS IN.-LBS. 4-40 4-48 5-40 5-44 6-32 6-40 8-32 8-36 10-24 10-32 1/4-20 1/4-28 5/16-18 5/16-24 3/8-16 3/8-24 7/16-14 7/16-20 1/2-13 1/2-20 9/16-12 9/16-18 5/8-11 5/8-18 3/4-10 3/4-16 7/8-9 7/8-14 1-8 1-14 5.2 6.6 7.7 9.4 9.6 12.1 19.8 22.0 22.8 31.7 75.2 94.0 132 142 236 259 376 400 517 541 682 752 1110 1244 1530 1490 2328 2318 3440 3110 4.3 5.4 6.3 7.7 7.9 9.9 16.2 18.0 18.6 25.9 61.5 77.
SECTION VII – ABS TYPE APPROVAL PROGRAM 28
