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Summary of Contents for Hubbell JHX
- Page 1 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...
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Page 2: Important Safety Information
10. *Disclaimer: 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... -
Page 3: Table Of Contents
TABLE OF CONTENTS SECTION TITLE PAGE No. TANKLESS BOOSTER HEATER OPERATING PRINCIPLE GENERAL DESCRIPTION AND CONSTRUCTION INSTALLATION OPERATION AND MAINTENANCE TROUBLESHOOTING SERVICING & REPLACEMENT OF PARTS PARTS LIST VIII WARRANTY... -
Page 4: Tankless Booster Heater Operating Principle
The Hubbell Tankless Booster Heater does not store hot water like a conventional tank-type booster heater. It contains high powered heating elements that are capable of heating water instantly on-demand as needed. -
Page 5: General Description And Construction
SECTION II – GENERAL DESCRIPTION AND CONSTRUCTION Technical Specifications Common to All Models: Materials: Copper Exchanger / ¾” Copper Sweat Stainless Steel Casing Plumbing Flow Connection: Energy High 1” Copper Sweat Efficiency: Flow Voltage: 208-600 Volts Operating Range: 5 – 150 psi Frequency: 50 / 60 Hz Protection:... - Page 6 Hi-Limit Switches Heating Chamber Outlet Thermistor Hot Water Heating Elements Outlet Drains Element Switching Devices (Triacs) Inlet Thermistor (beneath triac plate) Warm Water Inlet Control Fuse Flow Meter Temperature Controller Power Distribution Block LED Digital Display Ground Lug Magnetic Contactor Transformer (with buttons) Notes:...
- Page 7 34.2 17.1 11.4 36.9 18.5 12.3 1. Shaded values indicate that a High Flow (JHX) unit is required. 2. Blank values indicate that the flow rate will exceed the flow capability of the flow meter. 3. For alternate power (kW) values, the maximum flow rate can be calculated using the formulas on the following page.
- Page 8 Tankless High Flow Pressure Drop Chart (JHX): Wattage De-rating Formula: Applied Voltage × Rated Wattage = Actual Wattage Rated Voltage For example: If installing a 27 kW unit when actual voltage is 212 V, 44,944 = 0.78 × 27,000 W = 21,060 W @ 212 V...
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Page 9: Installation
Locating and Mounting Instructions: The Hubbell tankless booster heater can be installed just about anywhere. Due to the small size of the water heater, it can be mounted in many small spaces. However, there are some important guidelines to follow that will ensure that the installation is both safe and convenient in the event that future servicing is required. -
Page 11: Important Information
Plumbing Installation Instructions: IMPORTANT INFORMATION: • Ensure all fitting installations comply with local plumbing and building codes. • The booster heater does not require a temperature and pressure (T&P) relief valve. A T&P relief valve may be installed if required by county, city or state plumbing code. •... - Page 12 • Flush the line: Before connecting the union to the unit, it is extremely important to flush the lines to eliminate all plumbing paste, residue, or debris in the lines Checking for Leaks and Purging Air: • If unit has been wired, verify all circuit breakers supplying power to the unit are turned off.
- Page 13 Min. Element Volts / Breaker Wire Conduit Wiring Model Phase Amps Size Size Size Diagram Draw JTX008-2RS 208 / 1 38.5 ¾" 19.9 JTX011-3R 208 / 3 30.5 ¾" 16.3 JTX011-2S 240 / 1 45.8 ¾" 22.9 JTX011-3T3 380 / 3 16.7 ¾"...
- Page 14 NEC table 310.16 for sizing. □ Conductors should be sized to maintain a voltage drop of less than 3% under load. □ Electrical specifications for the High Flow (JHX) models are the same as listed for the Low Flow (JTX) models.
- Page 15 □ Where “Min. Breaker Size” is marked with a star (*), these models require 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: 4/0 o JTX042-6S: 3/0...
- Page 16 Wiring Diagram 1 Wiring Diagram 2...
- Page 17 Wiring Diagram 3 Wiring Diagram 4...
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Page 18: Wiring Diagram
Outlet Thermistor Heating Heating Heating Temperature Element Element Element Controller Inlet Triac Thermistor Leak Detection Wire Triac Fuse Flow Meter Triac Transformer Magnetic Contactor Hi-Limit Hi-Limit Hi-Limit Wiring Diagram 5 Wiring Diagram 6... - Page 19 Heating Heating Heating Element Element Element Outlet Thermistor Heating Heating Heating Element Element Element Temperature Triac Controller Inlet Triac Thermistor Leak Detection Triac Triac Wire Triac Triac Flow Meter Magnetic Contactor Fuse Hi-Limit Hi-Limit Hi-Limit Hi-Limit Hi-Limit Hi-Limit Wiring Diagram 7...
- Page 20 Wiring Diagram 8...
- Page 21 Heating Heating Heating Element Element Element Outlet Thermistor Heating Heating Heating Element Element Element Temperature Triac Controller Inlet Thermistor Triac Leak Detection Wire Triac Triac Flow Meter Triac Triac Fuse Transformer Magnetic Contactor Hi-Limit Hi-Limit Hi-Limit Hi-Limit Hi-Limit Hi-Limit Wiring Diagram 9...
- Page 22 Wiring Diagram 10...
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Page 23: Operation And Maintenance
SECTION IV – OPERATION AND MAINTENANCE First Use of your Hubbell Tankless Booster Heater: Once the water supply is on and air has been purged from the system, power the unit on at the main panel. The unit is now operating automatically. When water flows through the unit, the heating elements turn on to heat the water to the displayed setpoint temperature. - Page 24 Maintenance: • The Hubbell Tankless Booster Heater requires no maintenance other than to periodically check around the outside of the unit for leaks. If a water leak is detected from your water heater, turn off the water supply at the shut-off valve on the inlet side of the water heater, turn off the power to the heater at the main electrical panel and call a service technician or plumber for evaluation and repair.
- Page 25 2. dSP2, to display measured inlet temperature intermittently with setpoint temperature. a. Inlet temperature is displayed as i### 3. dSP3, to display measured outlet temperature intermittently with setpoint temperature. a. Outlet temperature is displayed as o### 4. dSP4, to display measured flow rate intermittently with setpoint temperature a.
- Page 26 4. Diagnostic Menu Display a. To display common diagnostic data useful for troubleshooting, when in normal display mode press and release the UP and DOWN buttons simultaneously. b. The display will intermittently display the following values: flow rate (F##.#), measured inlet temp (i###), measured outlet temp (o###), setpoint (###).
- Page 27 f. Err6, indicates a failure of the outlet thermistor g. Err7, indicates a failure of the display unit to communicate with the main board h. LEA H2O, indicates that water has been detected in the case Remote Display An optional remote display may be supplied and connected to the TK2000 control board as shown below.
- Page 28 Power and Triac Wiring Outlet Thermistor Inlet Thermistor Leak Priority Detection Relay Display Auxiliary Remote Display F1 F2 F3 Flow Meter P1(0VDC) P2(+24VDC) P3 Remote Control TK2000 Control Board Wiring Detail...
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Page 29: Vtroubleshooting
SECTION V – TROUBLESHOOTING Common Issues: Symptom Probable Cause Corrective Action Water reaches setpoint Low incoming water Incoming water temperature must be temperature but does temperature. adequate for the booster size. Increase the not last through the incoming water temperature. entire dishwasher Incoming water Primary water supply is not adequate to... - Page 30 Initial Evaluation:...
- Page 31 This troubleshooting section will cover all the points that need to be checked from an electrical standpoint to ensure that the Hubbell tankless booster heater is working correctly and to determine which component may need to be replaced.
- Page 32 Primary Voltage Secondary Voltage (±5%) Note: The secondary voltage listed in the transformer is based on the transformer being used at full capacity. Because there is essentially “no load” on the transformer, the secondary voltage will be higher than the voltage listed on the transformer. This “regulation” varies from 8.4% to 12% depending on the primary voltage and the transformer used.
- Page 33 8. If correct voltage is present, check the voltage at the right-hand side of the thermostat, then the left-hand side of the thermostat above and continue this pattern to the uppermost thermostat. 9. If at any point there is voltage on the left-hand side and there is no voltage on the right-hand side of the same thermostat, replace that hi-limit thermostat.
- Page 34 6. Repeat the above step with the lower terminal block (inlet thermistor). 7. If either of these readings is not consistent with the chart (within ±10,000Ω), replace that thermistor. 8. If all ohms readings are acceptable, proceed to Check the Flow Meter. Check the Flow Meter: 1.
- Page 35 YELLOW 10. Check the voltage between the terminal block where the first wire is connected from left to right and the metal heating chamber cover. A voltage reading in the appropriate range (one half of the incoming power voltage, i.e. if the incoming power is 480V, then the reading should be 240V) should be indicated.
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Page 36: Servicing & Replacement Of Parts
SECTION VI – SERVICING & REPLACEMENT OF PARTS WARNING: Serious bodily injury or death may occur if the following warnings are ignored. • This following portion of this section is intended for use by a QUALIFIED ELECTRICIAN OR PLUMBER. • All circuit breakers must be turned off at the main panel before the cover of the unit is removed. - Page 37 Inlet Thermistor: • Disconnect power. • Remove cover. • Disconnect inlet thermistor wires from the controller. • Cut the tie-wrap securing the inlet thermistor to the inlet pipe and remove the inlet thermistor. • Spread a pea sized amount of the conductive thermal paste included with the replacement kit on the inlet pipe where the replacement inlet thermistor is to be installed.
- Page 38 Triac: • Disconnect power. • Remove cover. • Disconnect the wire from the heating element, the BLACK wire from the power distribution block or YELLOW magnetic contactor (as applicable), and the wire from the controller for the triac to be replaced. NOTE: Replacement triacs come with replacement wires attached.
- Page 39 Magnetic Contactor: • Disconnect power. • Remove cover. • Mark the wires going to the magnetic contactor so they can be re-connected in the same places upon replacement. • Disconnect all the wires from the magnetic contactor. • Remove the two (2) screws securing the magnetic contactor to the base.
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Page 40: Parts List
SECTION VII – PARTS LIST Category Description Hubbell P/N Plumbing Dielectric Union- 3/4" Sweat x 3/4"FNPT DIELECTRIC UNION Dielectric Union- 1" Sweat x 1"FNPT DIELECTRIC UNION 1" Heating Chamber: 3 Element, Low Flow TK3-FM Heating Chamber: 3 Element, High Flow... -
Page 41: Warranty
Service Center 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 42 Product nor will Hubbell be liable for any water damage arising directly or indirectly from the use of the Product or from the failure of or defect in any component part or connecting plumbing.
- Page 43 NOTES...
- Page 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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