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Hubbell JHX, Installation, Operation And Maintenance Manual

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INSTALLATION, OPERATION, AND 

MAINTENANCE MANUAL FOR 

THE HUBBELL MODEL JTX / JHX 

TANKLESS BOOSTER HEATER 

 
 
 
 
 
 
 
 

 
 

 

ELECTRIC HEATER COMPANY 

 

 

 
* The Hubbell Model JTX is designed for use with conveyor and flight type dish 
machines. This product is not intended for use with door style dish machines.  
 
 
 
 
 

Edition 2012A

Summary of Contents for JHX

Page 1: ...FOR THE HUBBELL MODEL JTX JHX TANKLESS BOOSTER HEATER ELECTRIC HEATER COMPANY The Hubbell Model JTX is designed for use with conveyor and flight type dish machines This product is not intended for us...

Page 2: ...r lockout must be used Ref NEC 422 31 8 Water Quality Requirements Recommended water hardness is 4 to 6 grains of hardness per gallon GPG Water hardness above 6 GPG should be treated by a water condit...

Page 3: ...No I TANKLESS BOOSTER HEATER OPERATING PRINCIPLE 4 II GENERAL DESCRIPTION AND CONSTRUCTION 5 III INSTALLATION 9 IV OPERATION AND MAINTENANCE 23 V TROUBLESHOOTING 29 VI SERVICING REPLACEMENT OF PARTS...

Page 4: ...mitted continually to the microprocessor controller which determines the precise amount of power to send to the heating elements to heat the water to the desired temperature The Hubbell tankless boost...

Page 5: ...Materials Copper Exchanger Stainless Steel Casing Plumbing Connection Low Flow Copper Sweat Energy Efficiency 98 High Flow 1 Copper Sweat Voltage 208 600 Volts Operating Range 5 150 psi Frequency 50 6...

Page 6: ...eating Chamber Transformer Power Distribution Block Control Fuse Notes 1 Power distribution blocks are only installed on single phase models and 3 phase models that require two magnetic contactors Sin...

Page 7: ...5 7 4 3 3 4 2 8 2 4 2 1 1 7 1 4 1 2 27 36 9 18 5 9 2 6 2 4 6 3 7 3 1 2 6 2 3 1 8 1 5 1 3 30 20 5 10 3 6 8 5 1 4 1 3 4 2 9 2 6 2 1 1 7 1 5 31 21 2 10 6 7 1 5 3 4 2 3 5 3 0 2 6 2 1 1 8 1 5 33 22 6 11 3...

Page 8: ...unit when actual voltage is 212 V 2122 44 944 0 78 27 000 W 21 060 W 212 V 2402 57 600 Amperage Formula Watts Amps Single Phase Watts 1 73 Amps 3 Phase Volts Volts Flow Rate Formulas To determine powe...

Page 9: ...to freezing temperatures If the water inside the tankless booster heater freezes it can cause severe and permanent damage that is not covered under the warranty If you suspect that the tankless booste...

Page 10: ...10...

Page 11: ...introduced into the water system i e Well water systems lake pumps and other municipal systems A shut off valve MUST be installed on inlet side of unit A shut off valve on the outlet is recommended Ty...

Page 12: ...or Canadian Electric Code Canada The unit must have its own independent circuits When the heater is not within sight of the electrical circuit breakers an additional local means of disconnection of al...

Page 13: ...8 3R 18 208 3 50 0 60 6 3 28 9 JTX018 2S 18 240 1 75 0 80 4 1 1 37 5 JTX018 3T3 18 380 3 27 3 30 8 4 15 7 JTX018 3T7 18 415 3 25 0 30 8 4 14 4 JTX018 3T4 18 480 3 21 7 25 8 4 12 5 JTX020 3RS 20 208 1...

Page 14: ...JTX048 6S 48 240 1 200 0 225 2 2 2 6 33 3 JTX048 6T 48 240 3 115 5 125 1 2 8 33 3 JTX048 6T7 48 415 3 66 8 80 4 1 9 19 3 JTX048 6T4 48 480 3 57 7 70 6 9 16 7 JTX048 6T6 48 600 3 46 2 50 8 10 46 2 JTX...

Page 15: ...a supplemental protection assembly for installation For the following models for installation in Canada per CSA requirements a single feed is required sized as follows o JTX036 6RS 3 0 o JTX040 6RS 4...

Page 16: ...16 Wiring Diagram 1 Wiring Diagram 2...

Page 17: ...17 Wiring Diagram 3 Wiring Diagram 4...

Page 18: ...Temperature Controller Hi Limit Hi Limit Hi Limit Heating Element Heating Element Heating Element Outlet Thermistor Inlet Thermistor Magnetic Contactor L1 L2 L3 Leak Detection Wire Transformer Fuse Wi...

Page 19: ...Hi Limit Hi Limit Heating Element Heating Element Heating Element Outlet Thermistor Inlet Thermistor Magnetic Contactor L1 L2 L3 Hi Limit Hi Limit Hi Limit Heating Element Heating Element Heating Elem...

Page 20: ...20 Wiring Diagram 8...

Page 21: ...it Hi Limit Heating Element Heating Element Heating Element Outlet Thermistor Inlet Thermistor Magnetic Contactor L1 L2 L3 Hi Limit Hi Limit Hi Limit Heating Element Heating Element Heating Element Tr...

Page 22: ...22 Wiring Diagram 10...

Page 23: ...the unit the heating elements turn on to heat the water to the displayed setpoint temperature When the water flow stops the heating elements turn off You can adjust the setpoint upward or downward by...

Page 24: ...seconds Note that the display will change during the time you are holding the buttons You are in the configuration menu and can release the buttons when the first character of the display is P b To sc...

Page 25: ...3 to 3 Default is 0 viii Low High Flow Sets the unit as either a low flow or high flow unit 1 LF for low flow Factory Default 2 HF for high flow ix Remote Control Sets the operation of the remote con...

Page 26: ...lay will only flash when the display configuration is set to dSP1 7 Cost Calculator Allows the user to view the amount of power and hot water consumed and the cost of operation a To display the Cost C...

Page 27: ...ade 1 Priority Relay 10A 240VAC max a When the unit is demanding power calling for heat i The connection between the terminals marked C and NO are closed and will allow power to pass through ii The co...

Page 28: ...ontrol Board Wiring Detail Power and Triac Wiring Outlet Thermistor Inlet Thermistor Leak Detection F1 F2 F3 Flow Meter Remote Display Display Auxiliary P1 0VDC P2 24VDC P3 Remote Control Priority Rel...

Page 29: ...uirements of the dishwasher If required replace with a properly sized unit Incorrect voltage Voltage available at the booster heater must be correct for unit Verify voltage on all phases matches namep...

Page 30: ...30 Initial Evaluation...

Page 31: ...Power Supply to the Unit 1 Turn on power to the unit from the main panel 2 Check the incoming voltage between each phase at the line side of the power distribution block or magnetic contactor as appli...

Page 32: ...nection point of the thermostat and the metal plate If shrink wrap is present around the metal connection point to the hi limit thermostat cut back the shrink wrap with a knife to expose the metal con...

Page 33: ...ttons simultaneously 3 With a thermometer measure the temperature of the cold water and hot water at a fixture 4 Compare the displayed inlet temperature i to the measured cold water temperature and th...

Page 34: ...fy the wiring is correct as indicated in the wiring diagram specific to the model 2 Check the voltage between the terminal block where the RED wire is connected this will be the leftmost terminal and...

Page 35: ...element should be replaced 5 If all voltage readings are acceptable proceed to Check the Heating Elements Check the Heating Elements 1 To check the heating element the amperage draw from each heating...

Page 36: ...inlet and hot water outlet valves Bleed air from the unit See Checking for Leaks and Purging Air in Section III Turn on power Hi Limit Switch Disconnect power Remove cover For single phase models disc...

Page 37: ...lacement outlet thermistor is to be installed Secure the outlet thermistor to the outlet pipe with a new piece of aluminum tape Position the outlet thermistor such that the wires are facing towards th...

Page 38: ...nnect the flow meter wires from the controller NOTE The display may need to be removed to access the wires from the flow meter The display can be removed by removing the four 4 screws securing the dis...

Page 39: ...cted from Re install cover Turn on power Transformer Disconnect power Remove cover Mark the wires going to the transformer so they can be re connected in the same places upon replacement Disconnect al...

Page 40: ...000 Watts 440 Volts 12 long N1315 7000T5 8000 Watts 440 Volts 12 long N1375 8000T5 9000 Watts 440 Volts 12 long N1375 9000T5 7000 Watts 346 Volts 12 long N1315 7000T6 8000 Watts 346 Volts 12 long N137...

Page 41: ...EMENT 2 LIMITATION OF REMEDIES AND DAMAGES Hubbell s liability and Buyer s exclusive remedy hereunder will be limited solely at Hubbell s option to repair or replacement by the Hubbell Service Center...

Page 42: ...ted Warranty shall be governed by the laws of the State of Connecticut any and all actions arising from or relating to this Manufacturer s Limited Warranty and any aspects of the Product shall be brou...

Page 43: ...43 NOTES...

Page 44: ...44 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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