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SHP-I&S-02
INSTALLATION AND SERVICE MANUAL
COMMERCIAL ELECTRIC WATER HEATERS
52, 82, 119 Gallon, 9 kW - 54kW Input Models
3. Water heater corrosion and component failure caused
by air-borne chemical vapors is not covered under the
manufacturer's warranty.
4. Corrosion damage caused by current leakage due to
improper grounding of electrical systems or electronic
components to the storage tank and related piping is not
covered by the manufacturer's warranty.
5. Under no circumstance will the
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CONTENTS WARNING: Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 If the information in this manual is not followed Safety Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 exactly, a fire or explosion may result causing Checking the Equipment . . . . . . . . . . . . . . . . . . . . . . . . .1 property damage, personal injury or loss of life. Do Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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6. The floor on which the appliance is installed must be CODES capable of supporting the total weight of the water The equipment shall be installed in accordance with those heater when completely filled with water. Combustible installation regulations in force in the local area where the floor locations may be used. Maintain required installation is to be made. These shall be carefully followed clearances from combustible surfaces. in all cases. Authorities having jurisdiction shall be co
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MOUNTING CLEARANCES FROM COMBUSTIBLE CONSTRUCTION The water heater should be mounted to the floor following applicable architectural and local code requirements or accepted standards for the specific site and model purchased. In areas prone to seismic activity, it is recommended that the water heater be mounted to the floor according to recommended procedures for the site. In some geographic areas, additional strapping or braces may be required, consult local codes for specific requirements. P
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CAUTION INLET AND OUTLET CONNECTIONS Avoid contact with hot discharge water. Insure that For ease of service, install unions on the cold water inlet no one is in front of or around the relief valve and hot water outlet of the water heater. The cold water discharge line. Make sure that the extremely hot inlet connection is located on the lower left front side of the water manually discharged from the relief valve will water heater. A manual shutoff valve should be installed not cause bodily i
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1. Use copper conductors only. All wiring between the ELECTRICAL CONNECTIONS appliance and field installed devices shall be made with All installation procedures involving electric power copper wire suitable for at least 167°F (75°C) connection should only be performed by a trained, certified temperature rating. If the wiring from an old water electricians. heater installation was aluminum, replace the old wire with copper wire. 2. The factory internal wiring is attached to a terminal bl
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� Underwriter's Laboratories, Inc. listing for all models as a JACKET ASSEMBLY commercial electric water heater. Outer Jacket - The outer jacket assembly is constructed The following items are available as extra cost options. from heavy gauge steel. The exterior surface is specially prepared and phosphate coated to allow application of a � Immersion thermostats with magnetic contactors multiple coat enamel paint process. This coating process insures a long life from the jacket assembly. COMPON
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A main power terminal block is provided for field SURFACE THERMOSTATS connection of the branch power supply to the electric water WITH HIGH LIMIT heater. All internal power circuits to the immersion heating elements are connected to the load side of the main terminal block. The line side of the terminal block has individual lug type connections properly sized for the recommended copper field wire size. FUSES AND FUSE BLOCKS FIG. 8 Surface Thermostat/High Limit WARNING: HAZARD OF ELECTRICAL
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The limit is reset by pushing the red reset button on the CONTROL CIRCUIT TRANSFORMER limit. Operation of the limit control usually indicates a major problem with the heating elements or temperature control. Do not continue to push the reset multiple times. The problem causing the reset to function must be found and corrected to insure proper operation. The blanket of fiberglass insulation must be replaced over the surface thermostats and immersion heating elements before the power is turned o
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Allow a few days of operation at the setting to determine WARNING: the correct temperature setting consistent with your needs. HAZARD OF ELECTRICAL SHOCK - Before NOTE: opening the electrical access panel to adjust the thermostat or servicing the water heater, make sure (1) This water heater, when set at the lower the electrical supply to the water heater is turned temperature setting, is not capable of producing hot "OFF". Failure to do this could result in death, water of sufficient tempera
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WARNING: HIGH WATER TEMPERATURE LIMIT CONTROL SHOULD OVERHEATING OCCUR OR THE TEMPERATURE CONTROLS FAIL TO SHUT OFF, TURN OFF OR DISCONNECT THE ELECTRICAL SUPPLY AT THE MAIN POWER DISCONNECT, EXTERNAL TO THE APPLIANCE. DANGER � Water temperature over 125°F (51.7°C) can cause severe burns instantly or death from scald. � Children, disabled and elderly are at highest risk of being scalded. �See instruction manual before setting temperature at heating appliance. � Feel water before bathing o
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START-UP PROCEDURE IMMERSION HEATING ELEMENTS Never operate the heating elements without being certain the water heater is filled with water and a temperature and pressure relief valve is installed in the relief valve opening on top of the heater. DANGER Full power is present whenever the cabinet door is opened. THERMAL EXPANSION Many water systems are equipped with pressure reducing valves, check valves or back flow preventers which may cause the water system to be closed. As water is heated,
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12. As the water heater starts heating, check the contactors NOTE: for "buzzing" or "chattering" during operation. If noise The cold water supply must be left in the open is detected, turn off main power, open the control panel position when the water heater is in use. and clean the contact points of the magnetic contactor(s). Remove any dust, dirt or foreign matter 5. Check the nearby hot water faucet to verify that air is that may have found its way into the contactor or other exiting
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SHUTDOWN PROCEDURE TEMPERATURE AND PRESSURE RELIEF VALVE OPERATION 1. Turn off the main electrical power to the water heater. If the power disconnect point is out of sight, lock it in the The temperature and pressure relief valve(s) should be open ("OFF") position and tag to prevent unexpected manually operated at least once a year. A relief valve that application of power. fails to completely reseat after manual operation and continues to discharge water must be immediately replaced 2. Tur
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Corrosion due to water chemistry generally shows up first cleaned from the bottom of the tank. in the hot water system because heated water increases the rate of corrosive chemical reactions. Water heater maintenance includes periodic tank flushing and cleaning and removal of lime scale from the heating NOTE: elements. Where used, the water heating system circulating pump should be oiled. All gaskets on disassembled clean-out openings must be replaced with new gaskets on FLUSHING THE STORAGE T
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7. Clean remaining gasket recess on each screw-in element Water is too hot flange. Do not reuse element gaskets. 1.Refer to "Temperature Regulation" and reset the 8. Install a new gasket on each element. Install element into thermostat setpoint to a lower temperature that will meet the tank opening where it was originally installed. requirements for hot water Tighten the flange with the socket and breaker bar used Water heater makes sounds to remove the element. 1.Sediment or lime scale ac
