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Hubbell JSK Series Operating And Maintenance Manual

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OPERATING AND MAINTENANCE
MANUAL FOR
ELECTRIC HEATER
ELECTRIC HEATER COMPANY
BASE MODEL "JSK/JFR"
2019 Edition
1

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Summary of Contents for Hubbell JSK Series

  • Page 1 OPERATING AND MAINTENANCE MANUAL FOR ELECTRIC HEATER ELECTRIC HEATER COMPANY BASE MODEL “JSK/JFR” 2019 Edition...
  • Page 2 HUBBELL ELECTRIC HEATER COMPANY 45 SEYMOUR STREET 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.
  • Page 3 The JFR Series heating unit is specifically made for food rethermalizing, however, the heating unit is designed to be incorporated into a hot water bath rethermalizer. Hubbell does not supply the vessel that contains the water, nor the sytem which determines how food is placed and held in the vessel.

  • Page 4: Table Of Contents

    TABLE OF CONTENTS SECTION TITLE PAGE No. GENERAL DESCRIPTION AND CONSTRUCTION INSTALLATION AND START-UP SCHEDULED MAINTENANCE AND OPERATION TROUBLESHOOTING SERVICING AND REPLACEMENT OF PARTS SERVICE PARTS LIST TORQUE VALUES VIII WARRANTY INFORMATION...

  • Page 5: General Description And Construction

    180°F sanitizing rinse water and Food Rethermalizing/Bain Marie heater (Hubbell Model JFR) that is used to heat foods to temperatures of between 140°F and 190°F. The complete assembly is designed to directly mount under a sink or holding vessel and consists of the storage tank, immersion electric heating element(s), electronic control module, enclosure, magnetic contactor(s), and any other required electrical operating control.
  • Page 6 SIZING INFORMATION BOTTOM VIEW RIGHT SIDE VIEW 1) For JSK models in a sink heater application use a minimum of 2000 watts per square foot of vessel top. 2) For JFR models in a food rethermalizer application use a minimum of 2000 watts per square foot of vessel top.
  • Page 7 TANK CONNECTIONS The heater is supplied with two standard 1 ½” sink connections intended to be connected to the bottom of a sanitation sink or holding vessel. See drawing for locations and sizes. HEATING ELEMENT The water heater is supplied with an electric immersion heating element composed of corrosion resistant sheathed elements that are fitted into a 1”...

  • Page 8: Installation And Start-Up

    SECTION II – INSTALLATION AND START-UP 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.
  • Page 9 Wiring Chart. Single-phase installations require two (2) leads plus ground. All Hubbell 3-phase heaters are intended for use with a 3-wire delta system plus ground. No neutral is required. For a 4-wire plus ground system, install 3 legs of power plus the ground and terminate the neutral leg.
  • Page 10 START-UP 1. Check that the fused disconnect switch or circuit breaker is on, or if equipped with power cord and plug make sure the unit is plugged into a properly grounded receptacle of the correct voltage, size, and plug configuration. 2.
  • Page 11 JSK and JFR Wiring Charts Phase- Internal Copper Unit Min. Feed Phase Power Power Conduit Wiring Volts Breaker or Resistance Wire Feed Wire Size Diagram Draw Fuse Size (Ohms) Size Size 14.4 14.4 ¾” 1(NT) 28.8 ¾” 3(NT) 11.5 19.1 ¾”...
  • Page 12 JSK and JFR Wiring Chart Notes: 1. Power feed wire sizing is based on using 75°C Cu THHN wire with feeder branch protection rated at 125%. 2. Internal wire sizing is based on using 90°C Cu THHN wiring in a raceway with an ambient temperature up to 60°C.
  • Page 13 1(WT) 1(NT) HEATING HEATING HEATING HEATING BLANK HEATING HEATING HEATING HEATING BLANK COVER ELEMENT ELEMENT ELEMENT ELEMENT COVER ELEMENT ELEMENT ELEMENT ELEMENT PROBE TRANSFORMER TRANSFORMER PROBE CONTACTOR CONTACTOR T1250 T1250 T1250 T1250 CONTROL CONTROL CONTROL CONTROL BOARD BOARD BOARD BOARD J1 J1 LEAK LEAK...
  • Page 14 3(NT) 3(WT) HEATING HEATING HEATING HEATING HEATING HEATING HEATING HEATING HEATING HEATING HEATING HEATING ELEMENT ELEMENT ELEMENT ELEMENT ELEMENT ELEMENT ELEMENT ELEMENT ELEMENT ELEMENT ELEMENT ELEMENT PROBE PROBE TRANSFORMER TRANSFORMER CONTACTOR CONTACTOR T1250 T1250 T1250 T1250 CONTROL CONTROL CONTROL CONTROL BOARD BOARD BOARD...
  • Page 15 5(NT) 5(WT) HEATING HEATING HEATING HEATING HEATING HEATING HEATING HEATING HEATING HEATING HEATING HEATING ELEMENT ELEMENT ELEMENT ELEMENT ELEMENT ELEMENT ELEMENT ELEMENT ELEMENT ELEMENT ELEMENT ELEMENT PROBE PROBE CONTACTOR TRANSFORMER TRANSFORMER CONTACTOR T1250 T1250 CONTROL CONTROL T1250 T1250 BOARD BOARD CONTROL CONTROL BOARD...

  • Page 16: Scheduled Maintenance And Operation

    SECTION III – SCHEDULED MAINTENANCE AND OPERATION WARNING / CAUTION Before performing any maintenance procedure, make certain the power supply is turned 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 controller.
  • Page 17 1. L O n , for low water on. (Factory Default) 2. L O F , for low water off. iii. Low water reset – sets the low water reset for either automatic or manual 1. L A U , for low water automatic reset. (Factory Default) 2.
  • Page 18 5. Attach the flush hose with adapter that is connected to a fresh water supply and place the adapter in the outlet strainer connection. Flush until the sump drain is clear. 6. Close the sump drain valve by moving the handle into the vertical position. 7.
  • Page 19 i. Place limed ends of the heating element in a de-limer solution, designed for potable water applications, and allow lime to dissolve. Do not allow de-limer to contact heating element terminals. g. Other scale removal i. Silicates, sulfates, and aluminates must be removed by scraping or other mechanical means.

  • Page 20: Troubleshooting

    SECTION IV – TROUBLESHOOTING ERROR MESSAGES 1 . E r r , N o , P r b a. This message will flash when the controller does not detect that the P65 probe or control thermistor is connected to the control board. To clear this error reinsert the probe connector and press RESET.
  • Page 21 MISCELLANEOUS 2. If the display flashes when the unit is first turned on or turned on after maintenance, check that the J5 terminal on the controller is engaging all four pins on the board. 3. Note that before replacing the control board, display, or probe, it is recommended that the power supply to the heater be turned off at the main circuit breaker disconnect to the heater to reset and clear the electronic controller.
  • Page 22 GENERAL TROUBLESHOOTING Symptom Probable Cause Corrective Action Heater does not heat at Main supply circuit Check and/or reset the circuit breaker. all. breaker tripped. Heater circuit breaker If unit is supplied with a circuit breaker, tripped. check and/or reset the circuit breaker. Heater in high limit.
  • Page 23 CONTROL BOARD (T1250) / DISPLAY (TD1000) TROUBLESHOOTING 1. Verify proper power supply voltage between each phase (L1 to L2, L2 to L3, and L1 to L3). The power supply voltage should match the voltage listed on the nameplate. If voltage is incorrect, check main supply wiring or replace unit with proper heater. 2.
  • Page 24 1. Unplug and reseat the P65 probe wire in the jack on the T1250 control board. Note that the error message “ E r r , N o , P r b ” will be displayed and the reset button must be pressed to clear the message.

  • Page 25: Servicing And Replacement Of Parts

    #220 Buna-N O-Ring 8. Install new #220 Buna-N o-ring gasket and install new heating element. NOTE: Hubbell recommends lubricating the o-ring with Parker O-Lube prior to installation. 9. Rewire element according to the wiring diagram as shown in the Section II.
  • Page 26 Control Thermistor (JP3) Probe Ground (J7) Display Cable Leak Detection Wire (J2) Ground Wire (J8) Expansion (J1) (D1) Probe Cable (J3) Alarm Relay (J4) Power Wire (Common, White) Connector (J5) Power Wire (Black) Wire to #1 Contactor (yellow) Wire to #2 Contactor (red) Note: Probe connector J3 comes filled with a dielectric gel that should remain in the connector.
  • Page 27 4. Drain water from tank. 5. Remove the thermowell from tank using a 13/16” socket. 6. Install new #115 Buna-N o-ring gasket and install new thermowell. NOTE: Hubbell recommends lubricating the o-ring with Parker O-Lube prior to installation. WARNING: Do not remove the jam nut.

  • Page 28: Service Parts List

    5. Place wire ends into the JP3 connection and tighten the set screws. SECTION VI – SERVICE PARTS LIST Category Description Volts Ohms Hubbell P/N Accessories Flush Hose Kit Cord and Plug with Receptacle Contactors 20 Amp Resistive, 15 Amp Inductive, 208/240 VAC Coil C25DNF315B...

  • Page 29: Torque Values

    SECTION VII – TORQUE VALUES Torque Torque Part Wire Size (in•lbs) (ft•lbs) Element to Tank Wire to 1.25 Element Probe to Tank Wire to Ground KA4C 3.75 Transformer 1.25 Wire to Control 0.29 Board 1.25 C25DNF315B Wire to C25DNF330B 2.08 Contactor C25DNF340B 3.33...

  • Page 30: Warranty Information

    Street Stratford, CT 06615) for replacement or repair. Hubbell reserves the right to accept or reject any such claim in whole or in part. Hubbell will not accept the return of any product without prior written approval from Hubbell, and all such approved returns shall be made at Buyer's sole expense.
  • Page 31 NOTES...
  • Page 32 P.O. BOX 288 STRATFORD, CT 06615-0288 PHONE: (203) 378-2659 FAX: (203) 378-3593 INTERNET: http://www.hubbellheaters.com/...

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