Instruction Manual COMMERCIAL ELECTRIC WATER HEATERS MODELS DEL-6/10/15/20 Series 102 DEL-30/40/50 Series 110 & DEN-30/40/52/66/80/120 Series 110 INSTALLATION - OPERATION - SERVICE - MAINTENANCE - LIMITED WARRANTY 500 Tennessee Waltz Parkway Ashland City, TN 37015 Thank you for buying this energy efficient water heater. We appreciate your confidence in our products. place these instructions adjacent to heater and notify owner to keep for future reference.
SAFE INSTALLATION, USE, AND SERVICE The proper installation, use and servicing of this water heater is extremely important to your safety and the safety of others. Many safety-related messages and instructions have been provided in this manual and on your own water heater to warn you and others of a potential injury hazard. Read and obey all safety messages and instructions throughout this manual.
GENERAL SAFETY INFORMATION Precautions Hydrogen Gas (Flammable) DO NOT USE THIS WATER HEATER IF ANY PART HAS BEEN UNDER WATER. Immediately call a qualified service technician to inspect the water heater and to replace any part of the control system which has been under water. If the unit is exposed to the following, do not operate heater until all corrective steps have been made by a qualified service agency. 1. External fire. 2. Damage. 3. Firing without water.
TABLE OF CONTENTS Thermal Expansion..................................................................... 10 electrical.......................................................................................11 General.........................................................................................11 Branch Circuit...............................................................................11 Calculating Amperage/Overcurrent Protection.............................11 WIRING DIAGRAMS...................
dimensions and capacities data Figure 1 Table 1 - Rough-in dimensions Models Dimensions No. of Elements DEL-6 DEL-10 DEL-15 DEL-20 DEL-30 DEL-40 DEL-50 DEN-30 DEN-40 DEN-52 DEN-66 DEN-80 DEN-120 1 1 1 1 2 2 2 2 2 2 2 2 2 Tank Capacity US Gals.
APPROVALS All models are listed by Underwriters Laboratories Inc.
FEATURES AND COMPONENTS Electronic Control Models This page shows typical water heater installations by model designations. DEN/DEL DUAL ELEMENT HEATER DEN/DEL SINGLE ELEMENT HEATER INSTALL SUITABLE DRAIN PANS UNDER WATER HEATERS TO PREVENT DAMAGE DUE TO LEAKAGE. REFER TO WATER HEATER LOCATION ON page 8. I NSTALL THER M AL E X PANS I ON TANK IF CHECK VALVE OR PRESSURE REDUCING VALV E I S USED I N SUPPLY LINE. INSTALL VACUUM RELIEF IN COLD WATER INLET LINE AS REQUIRED BY LOCAL CODES.
LOCATING THE NEW WATER HEATER Facts to Consider About the Location to a drain. However, unanticipated damage can be reduced or prevented by a leak detector or water shut-off device used in conjunction with a piped drain pan. These devices are available from some plumbing supply wholesalers and retailers, and detect and react to leakage in various ways: • Sensors mounted in the drain pan that trigger an alarm or turn off the incoming water to the water heater when leakage is detected.
iNSTALLATION Required Ability Contaminated Water Installation and service of this water heater requires ability equivalent to that of a qualified installer or service agency (page 2) in the field involved. Plumbing and electrical work is required. This water heater shall not be connected to any heating system(s) or component(s) used with a non-potable water heating appliance. Toxic chemicals, such as those used for boiler treatment shall not be introduced into this system.
paragraph. The new valve must be marked with a maximum set pressure not to exceed the marked hydrostatic working pressure of the water heater (150 psi = 1,035 kPa) and a discharge capacity not less than the water heater Btu/hr or KW input rate as shown on the water heater’s model rating plate. For safe operation of the water heater, the temperature and pressure relief valve must not be removed from its designated opening nor plugged.
electrical This is an example of calculating heater amperage for both types of element operation. From this, the branch circuit conductor and overcurrent protection sizing can be established. The example is of a three-phase 240 volt unit with two, 6 kw elements. The notations are for units field converted to single-phase. Check the heater model and rating plate for actual specifications and substitute those values in the following.
WIRING DIAGRAMS A-8 CIRCUIT FOR DUAL ELEMENT HEATER C-2 CIRCUIT FOR SINGLE ELEMENT HEATERS EQUIPPED WITH HIGH LIMIT CONTROL FACTORY WIRED ---------- FIELD WIRING † WHITE FOR 120V & 277V Figure 3 12
OPERATION General Initial Start Up Refer to the Features and Components section of this manual (page 7) for the location of components mentioned in the instructions that follow. The following checks should be made by the installer when the heater is placed into operation for the first time. NEVER turn on power to the water heater without being certain the water heater is filled with water and a temperature and pressure relief valve is installed in the relief valve opening. 2.
TEMPERATURE REGULATION approximately the 140°F (60°C) setting. The over temperature device (ECO high limit) attached to each thermostat has a manual reset. MODEL WH10C 40A 120-277 VAC 25A.480-600 VAC 125VA.PT.DTY. 120-480 VAC MED APCOM INC 30A 120-250 VAC 22A 277 VAC 12.5A 480-600VAC 125 VA.PT.DTY. 120-480 VAC THE WATER HEATER IS EQUIPPED WITH AN ADJUSTABLE THERMOSTAT TO CONTROL WATER TEMPERATURE.
MAINTENANCE General Anode Rod Inspection The anode rod is used to protect the tank from corrosion. Most hot water tanks are equipped with an anode rod. The submerged rod sacrifices itself to protect the tank. Instead of corroding tank, water ions attack and eat away the anode rod. This does not affect water’s taste or color. The rod must be maintained to keep tank in operating condition. Periodically the drain valve should be opened and the water allowed to run until it flows clean.
TROUBLESHOOTING CHECKLIST Checklist ABNORMAL SOUNDS Before calling for service, check the following points to see if the cause of trouble can be identified and corrected. 1. Sediment or lime scale accumulations on the elements causes sizzling and hissing noises when the heater is operating. • Reviewing this checklist may eliminate the need of a service call and quickly restore hot water service. See Figure 2 on page 7 in this manual to identify and locate water heater components.
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. Where possible remove or lift top cover to examine threads of fittings installed into tank for evidence of leakage. Correct fitting leaks as necessary. Relief Valve Condensation and dripping may appear on pipes when cold water temperature is low.
WARRANTY A. O. Smith Corporation, the warrantor, extends the following LIMITED WARRANTY to the owner of this water heater: 1. THE TANK If the glass-lined 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. O. Smith water heater of equivalent size and current model.
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Repair Parts List Now that you have purchased this water heater, should a need ever exist for repair parts or service, simply contact the company it was purchased from or direct from the manufacturer listed on the rating plate on the water heater. Be sure to provide all pertinent facts when you call or visit.
Item Description DEL-6 DEL-10 DEL-15 DEL-20 Series 102 Series 102 Series 102 Series 102 1A........ Anode, Alum... . .................................. 9003942005.......... 9003942005......... 9003942005........ 9003944005 1B........ Anode, Mag. (SMR P72 and S19)...... 9001909005.......... 9001909005......... 9001909005........ 9003721005 2......... Collar, Pipe...........................................9004610115.......... 9004610115..........9004610115........ 9004610115 3......... Cover, Front........
Item Description DEL-30 DEL-40 DEL-50 DEN-30 DEN-40 DEN-52 DEN-66 DEN-80 Series 110 Series 110 Series 110 Series 110 Series 110 Series 110 Series 110 Series 110 DEN-120 Series 110 1A.....Anode, Alum. ............................. 9003944005.....9003944005.... 9003944005.....9003944005....9003944005.... 9003944005.... 9000029005..... 9003892005.....9003892005 1B.....Anode, Mag.(SMR P72)............ 9003721005.....9003721005.... 9003721005.....9003721005....9003721005.... 9003721005.... 9003721005.....
Figure 13 Table 6 - COPPER SHEATH ELEMENT AND WATTAGE CHART 120V 240V 277V 480V PART NO. PART NO. PART NO. PART NO. 9002863115 90001431005 --- --- 9000145005 9002864005 9001225115 --- 9002858005 9000145005 9004709115 --- 9002859005 9004712105 9002860005 9002890005 9002861005 9002862005 9002868005 9003959005 9003958005 9003961005 --- 9003950005 9004712105 --- --- K.W. ELEMENT WATTAGE PART NO. 1.0 1000W --- 1.5 1500W 9002963005 2.0 2000W 9003947005 2.
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