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Summary of Contents for Hubbell A
- Page 1 OPERATING AND MAINTENANCE MANUAL FOR ELECTRIC BOOSTER HEATER ELECTRIC HEATER COMPANY BASE MODEL “ A ”...
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Page 2: Warning / Caution
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. -
Page 3: Table Of Contents
SECTION TITLE GENERAL DESCRIPTION AND CONSTRUCTION INSTALLATION SCHEDULED MAINTENANCE AND OPERATION TROUBLESHOOTING SERVICING & REPLACEMENT OF PARTS MISCELLANEOUS CHARTS AND FORMULAS TABLE OF CONTENTS PAGE #... -
Page 5: Tank Connections
The heater is supplied with separate connections for the cold/warm inlet and the hot water outlet. Water entering the cold water inlet is deflected by means of a baffle within the tank. A ¾-inch FNPT connection is provided for mounting a combination safety temperature and pressure relief valve. An overflow line should be utilized from the relief valve outlet to a floor drain. -
Page 6: Control Thermostat
TEMPERATURE HIGH LIMIT SWITCH A surface mounted high temperature cut-off switch with manual reset, factory set at 205° 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. -
Page 7: On/Off Switch
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 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. - Page 8 Pressure Reducing Valve An optional pressure reducing valve with built-in bypass may be supplied. This valve is shipped separately for in-line installation. Stainless Steel Outer Jacket An optional stainless steel outer jacket may replace the standard galvaneel jacket. Stainless Steel Legs As an option, 6-inch adjustable stainless steel legs may be supplied.
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Page 9: Piping Installation
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 as near as possible to the dish washing machine. 2. The water heater should be protected from freezing and waterlines insulated to reduce energy and water waste. -
Page 10: Electrical Installation
Lever Temperature and Pressure Relief Valve 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. -
Page 11: Final Checks
3. After the water is heated for the first time, monitor the water temperature as described in Section III, Quarterly Inspection. Incoming Water (140°F) 1 – A Model Booster 2 – Dishwasher 3 – Pressure Regulator w/ built-in by-pass 4 – Pressure/Temperature Gauge 5 –... - Page 14 1 – Terminal Block 2 – Magnetic Contactor 3 – Heating Element 4 – Low Water Cut-Off, if supplied 5 – Transformer, 480-Volt/240-Volt, installed on 480-Volt models only. 6 – High-Temperature Limit Switch 7 – Control Thermostat 8 – Illuminated On/Off Switch...
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Page 16: Quarterly Inspection
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. -
Page 17: Annual Inspection
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. -
Page 18: Troubleshooting
‘AMP’ figure. Have source electrical system checked by an electrician. Move thermostat dial through full range. A definite ‘click’ should be heard. If not, replace thermostat. Check to see if tank is full of water. If not, fill tank. If problem... - Page 19 Water temperature below settings at all times Relief valve discharges continuously Faulty thermostat. Heating element not working on all phases Heater improperly sized Excessive temperature or pressure in tank Check thermostat adjustment. Monitor thermostat as described in Section III, Quarterly Inspection.
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Page 20: Servicing & Replacement Of Parts
SECTION V - 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. - Page 21 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. Note that picture shown is a three- phase heating element; a single-phase element has only two terminals. 7. Remove the 3/8-16 nuts.
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Page 22: Immersion Thermostat
IMMERSION THERMOSTAT 1. Disconnect power from unit. 2. Remove access cover and locate thermostat. 3. Remove high limit cover screw and cover. 4. Disconnect the two (2) 14 gauge wires. 5. Remove capillary tube and bulb from thermowell. 6. Remove two (2) mounting screws. 7. - Page 23 MAGNETIC CONTACTOR 1. Disconnect power from unit. 2. Disconnect line and load wires to contactor. 3. Disconnect two (2) 14 gauge control circuit wires. 4. Loosen two (2) holding screws and remove contactor. 5. Replace with new contactor using reverse procedure.
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Page 24: Relief Valve
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. -
Page 25: Miscellaneous Charts And Formulas
SECTION VI – ELEMENT CHART Element Part # 120V CH-FO-358 ---- CH-FO-408 ---- CH-FO-508 ---- CH-FO-608 2000 CH-FO-304 ---- CH-FO-354 ---- CH-FO-404 ---- CH-FO-454 ---- CH-FO-504 ---- CH-FO-604 1500 TGB-1403-480 ---- TGB-2457-480 ---- TGB-2503-480 ---- TGB-2603-480 ---- *Red wattage indicates the stamped element rating Power (kW) Element Part #... - Page 26 FORMULAS...
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Page 27: Torque Values
TORQUE VALUES 18-8 S/S BOLT SIZE IN.-LBS. IN.-LBS. 4-40 4-48 5-40 5-44 6-32 6-40 12.1 8-32 19.8 8-36 22.0 10-24 22.8 10-32 31.7 1/4-20 75.2 1/4-28 94.0 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 1110 5/8-18 1244 3/4-10 1530...
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