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MODELS DEN AND DEL
COMMERCIAL ELECTRIC WATER HEATERS
• Installation Electrical Wiring Diagrams Replacement Parts
Operation Maintenance Leakage Checkpoints Limited Warranty
A DIVISION OF A. O. SMITH CORPORATION
McBee, South Carolina, USA
www.hotwater.com
CAUTION
TEXT PRINTED OR OUTLINED IN RED CONTAINS INFORMATION RELATIVE TO YOUR SAFETY.
PLEASE READ THOROUGHLY BEFORE INSTALLING AND USING THIS APPLIANCE.
PLACE THESE INSTRUCTIONS ADJACENT TO HEATER AND NOTIFY OWNER TO KEEP FOR FUTUR
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ROUGH-IN DIMENSIONS * NO SIDE OUTLET AVAILABLE FOR DEL 6 MODELS ROUGH-IN DIMENSIONS Approx. Models No. of Tank Capacity A B C D Shipping Weight. Dimensions Elements US Gals. Litres inches mm inches mm inches mm inches mm Lbs. Kg. DEL-6 1 6 23 15 1/2 394 14 1/4 362 11 279 - - 35 15.9 DEL-10 1 10 38 18 1/4 464 18 457 12 1/2 318 - - 54 24.5 DEL-15 1 15 57 26 660 18 457 20 1/2 521 - - 58 26.3 DEL-20 1
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Do obtain new labels from A. O. Smith for placement on the FOREWORD blanket directly over the existing labels. Thank you for buying this energy efficient water heater from EXTENDED NON-USE PERIODS A.O. Smith Water Products Company. We appreciate your confidence in our products. Detailed installation diagrams are CAUTION in this manual. These diagrams will serve to provide the installer HYDROGEN GAS CAN BE PRODUCED IN A HOT WATER with a reference for the materials and method of piping SYST
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CLEARANCES CALCULATING AMPERAGE/OVERCURRENT PROTECTION A minimum clearance of 4” must be allowed for access to replaceable parts such as the thermostats, drain valve and relief The heaters come from the factory in two configurations: valve. 1. Two wire C-2 circuit for single element heater equipped with Adequate clearance for servicing this appliance should be a high limit control, single phase power input. considered before installation, such as changing the anodes, etc. 2. Four wire A-8 circui
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For ambient temperatures over 30° C (86° F), see Correction Not more than three conductors in Raceway or Cable or Direct Factors, Note 13 in Code. Burial (Based on Ambient Temperature of 30° C, 86° F. These ampacities relate only to conductors described in Table 310-13 Size Temperature Rating of Conductor in Code. See Table 310-13 in Code AMG 60° C 75° C For ambient temperatures over 30° C (86° F), see Correction MCM (140° F) (167° F) Factors, Note 13 in Code. TYPES: TYPES: RUW RH, RHW, RUH,
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TYPICAL PIPING CONNECTIONS This page shows typical water heater installations by model designations. DUAL ELEMENTS HEATER SINGLE ELEMENT HEATER INSTALL SUITABLE DRAIN PANS UNDER HEATERS TO PREVENT DAMAGE DUE TO LEAKAGE. REFER TO WATER HEATER LOCATION ON PAGE 2. INSTALL THERMAL INSTALL VACUUM RELIEF EXPANSION TANK IF IN COLD WATER INLET CHECK VALVE OR LINE AS REQUIRED BY PRESSURE REDUCING LOCAL CODES. VALVE IS USED IN † OVER CURRENT PROTECTION MUST BE SUPPLIED IN WATER HEATER CIRCUIT. SUPPLY LINE
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Figure 3 shows the approximate time-to-burn relationship for OPERATION normal adult skin. The thermostats on your water heater have a linear relationship between degrees of angular rotation and the CAUTION corresponding change in temperature. Thus rotating the DO NOT OPERATE THE HEATER WITHOUT INSTALLING AN temperature adjustment indicator 30 angular degrees will result APPROVED TEMPERATURE AND PRESSURE RELIEF VALVE in a 10 degree Fahrenheit change in water temperature. IN THE OPENING PROVIDE
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3. Using a flat tip screwdriver, rotate the adjusting knob to the Once a month the temperature and pressure relief valve should desired temperature setting. be checked to ensure that it is in operating condition. Lift the lever on the valve several times until the valve seats properly and 4. Replace the covers and access panels, and turn on heater operates freely. electrical supply. CAUTION Valves for reducing point-of-use temperature by mixing cold and THE WATER PASSING OUT OF THE VALVE DURI
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service, contact your dealer or utility company. Refer to Excessive water temperature. TEMPERATURE REGULATION section. Faulty relief valve. 4. The storage capacity of the heater may have been exceeded by large demands of hot water. Excessive water pressure is the most common cause of relief valve leakage. It is often caused by a “closed system”. A check 5. If the heater was installed when incoming water temperatures valve in the inlet system will not permit the expanded hot water wer
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LEAKAGE CHECKPOINTS Instructions: Use this illustration as a guide when checking for sources of water leakage. You or your dealer may be able to correct what appears to be a problem. NOTE: Cover and Insulation shown removed to reveal tank top Relief Valve Where possible remove or lift top cover to To Open Drain examine threads of fittings installed into tank for evidence of leakage. Correct fitting leaks Condensation and dripping may appear on as necessary. pipes when cold water temperature
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MODELS DEN AND DEL ELECTRIC WATER HEATER LIMITED WARRANTY A. 0. Smith Corporation, the warrantor, extends the following LIMITED WARRANTY to the owner of this water heater: 1. THE TANK If the glass-Iined tank in this water heater shall prove upon examination by the warrantor to have leaked due to natural corrosion from potable water therein, during the first THREE years after initial installation, the warrantor will supply a complete new A. 0. Smith water heater of equivalent size and current mod
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5621 W. 115TH STREET, ALSIP, IL 60803 Phone: 800-433-2545 Fax: 800-433-2515 www.hotwater.com e-mail: parts@hotwater.com 12
