Hubbell-electric-heater-company B Manuale Utente

OPERATING AND MAINTENANCE MANUAL FOR ELECTRIC BOOSTER HEATER ELECTRIC HEATER COMPANY BASE MODEL “ B ”

10 of water. To over come this condition, it is recommended that a 3/8” by-pass arrangement with a horizontal check valve be installed around the pr

11FINAL CHECKS 1. Check all connections for tightness. 2. Ensure that all the above steps are completed 3. After the water is heated for the

12 1 – Terminal Block 2 – Magnetic Contactor 3 – Heating Element 4 – Low Water Cut-Off, if supplied 5 – Transformer, 480-Volt/240-Volt, installe

13 1 – Terminal Block 2 – Magnetic Contactor 3 – Heating Element 4 – Low Water Cut-Off, if supplied 5 – Transfor

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15SECTION III - SCHEDULED MAINTENANCE AND OPERATION WARNING / CAUTION Before performing any maintenance procedure, make certain power supply is O

16 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 pipi

17SECTION IV – TROUBLESHOOTING Symptom Probable Cause Corrective Action / Remedy Circuit breaker tripped at source. Reset circuit breaker. Blow

18 Faulty thermostat. Check thermostat adjustment. Monitor thermostat as described in Section III, Quarterly Inspection. Replace if necessary. Heat

19SECTION V - SERVICING & REPLACEMENT OF PARTS WARNING / CAUTION Before servicing or replacing any part make sure to turn the power supply

2 HUBBELL ELECTRIC HEATER COMPANY P.O. BOX 288 STRATFORD, CT 06615 PHONE: (203) 378-2659 FAX: (203) 378-3593 INTERNET: http://www.hubbe

20 HEATING ELEMENT 1. Disconnect power from unit. 2. Shut off incoming water supply. 3. Attach hose to drain connection. 4. Lift manual release

21 IMMERSION THERMOSTAT 1. Disconnect power from unit. 2. Remove access cover and locate thermostat. 3. Remove high limit cover screw and cover.

22 MAGNETIC CONTACTOR 1. Disconnect power from unit. 2. Disconnect line and load wires to contactor. 3. Disconnect two (2) 14 gauge control circu

23RELIEF VALVE 1. Disconnect power from unit. 2. Shut off incoming water supply. 3. Lift test lever on relief valve to relieve pressure in tank.

24 SECTION VI – MISCELLANEOUS CHARTS AND FORMULAS ELEMENT CHART Power (kW) Resistance (Ohms) Element Part # 208V 240V 480V Immersion Length Ha

25TORQUE VALUES BOLT SIZE 18-8 S/S IN.-LBS. BRASS IN.-LBS. SILICONBRONZE IN.-LBS. ALUMINUM2024-T4 IN.-LBS. 316 S/S IN.-LBS. MONEL IN.-LBS. 4-40 5.

3 TABLE OF CONTENTS SECTION TITLE PAGE #

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5SECTION I - GENERAL DESCRIPTION AND CONSTRUCTION GENERAL DESCRIPTION This book describes a packaged electric booster heater that is typically use

6 CONTROL THERMOSTAT The water heater is supplied with an immersion thermostatic switch that is installed and wired at the factory. The thermostat c

7OPTIONS The following optional features may be included in your water heater. Reference included drawing specific to your heater for further detai

8 Pressure Reducing Valve An optional pressure reducing valve with built-in bypass may be supplied. This valve is shipped separately for in-line ins

9SECTION II – INSTALLATION WARNING / CAUTION DO NOT TURN ON THE ELECTRIC POWER SUPPLY to this equipment until heater is completely filled with wa