Rheem Light Duty Commercial Electric Water Heater manual

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Table of contents for the manual

  • Page 1

    Printed in USA AP11564-10 (01/05) WITH INST ALLA TION INSTR UCTIONS FOR THE INST ALLER Light Duty Commercial Electr ic W ater Heater U S E & C A R E MA N U AL ® LISTED 786H The purpose of this manual is twofold: one, to provide the installer with the basic directions and recommendations for the proper installation and adjustment of the water h[...]

  • Page 2

    Safety Inf ormation Safety Precautions . . . . . . 3 Installation Instructions Location . . . . . . . . . . . . . . . 4 Water Connections . . . . . . 4 Electrical Connections . 5, 6 Operating Instructions Safety Controls . . . . . . . . . 7 Water Temperature . . . . . . 7 Care and Cleaning Long Time Shut-Down . . . 8 Draining . . . . . . . . . . . [...]

  • Page 3

    To meet commercial water use needs, the thermostat on this water heater is adjustable to deliver water up to 170°F. However, water temperatures over 125°F. can cause severe burns instantly or death from scalds. This is the preferred starting point for setting the control for supplying general purpose hot water. Safety and energy conservation are [...]

  • Page 4

    1. INSPECT SHIPMENT — Inspect the water heater for possible damage. Check the markings on the rating plate of the water heater to be certain the power supply corresponds to that for which the water heater is equipped. 2. THERMAL EXPANSION — Determine if a check valve exists in the inlet water line. It may have been installed in the cold water l[...]

  • Page 5

    5 The pressure rating of the relief valve must not exceed 150 psi (1,034 kPa), the maximum working pressure of the water heater as marked on the rating plate. The BTUH Rating of the relief valve must not be less than the input rating of the water heater as in- dicated on the rating label located on front of the heater (1 watt = 3.412 BTUH). Connect[...]

  • Page 6

    A. Water Heater Location ❑ Close to area of heated water demand. ❑ Indoors and protected from freezing temperatures. ❑ Area free of flammable vapors. ❑ Provisions made to protect area from water damage. ❑ Sufficient room to service water heater. B. Water Supply ❑ Water heater completely filled with water. ❑ Water heater and piping air[...]

  • Page 7

    7 A. Do turn off power to water heater if it has been subjected to over heating, fire, flood or physical damage. B. Do Not turn on water heater unless it is filled with water. C. Do Not turn on water heater if cold water supply shut-off valve is closed. D. If there is any difficulty in understanding or following the OPERATION or MAINTENANCE instruc[...]

  • Page 8

    8 Properly maintained, your water heater will provide years of dependable trouble-free service. It is suggested that a routine preventive maintenance program be established and followed by the user. It is further recommended that a periodic inspection of the operating controls, heating element and wiring should be made by service personnel qualifie[...]

  • Page 9

    9 T r ouble Shooting Guide ** For your safety, DO NOT attempt repair of Electrical Wiring, Thermostat(s), Heating Elements or other Operating Controls. Ref er repairs to qualified service personnel. CA UTION ! NATURE OF TROUBLE POSSIBLE CAUSE SERVICE No Hot Water 1. Manual switch turned off Turn to ON 2. Improper Wiring ** Rewire per Wiring Diagram[...]

  • Page 10

    10 Replacement P arts List Light Duty Commer cial Models T all or Shor t V er sions Instructions for placing a Parts Orders: Address parts orders to the distributor or store from where the heater was purchased. All parts orders should include: 1. Model number and Serial number of heater (from rating plate). 2. Specify voltage and wattage as marked [...]

  • Page 11

    11 Ca vity Inser t Instructions The f ollo wing instructions are intended f or qualified service personnel ONL Y , and should only be done when necessary . In order to replace the thermostat or heating element, remove the cavity insert crossbar by following the instructions below: 1. Turn off the power to the water heater. 2. Remove the jacket acce[...]

  • Page 12

    Grounding conductor may be required. Refer to Wiring Section of Manual * This water heater is factory equipped for two (2) wire connection to electrical power . For use with "off-peak" meter (timer) remove wire nut from red and black leads and connect to "off- p eak" meter ( timer ) . ‡ Wiring Diagrams — Therm-O-Disc Thermos[...]