Table of Contents
Advertisement
Quick Links
Instruction Manual
COMMERCIAL LIGHT DUTY ELECTRIC WATER HEATERS
Lowboy 6/10/15/20 Models Series 102
Lowboy 30/40/50 Models Series 110
Tall 30/40/50/66/80/120 Models Series 110
INSTALLATION - OPERATION - SERVICE - MAINTENANCE
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.
PRINTED 1215
323289-005
1
Advertisement
Table of Contents
Related Manuals for A.O. Smith Lowboy 6
Summary of Contents for A.O. Smith Lowboy 6
- Page 1 Instruction Manual COMMERCIAL LIGHT DUTY ELECTRIC WATER HEATERS Lowboy 6/10/15/20 Models Series 102 Lowboy 30/40/50 Models Series 110 Tall 30/40/50/66/80/120 Models Series 110 INSTALLATION - OPERATION - SERVICE - MAINTENANCE Thank you for buying this energy efficient water heater. We appreciate your confidence in our products.
-
Page 2: Safe Installation, Use, And Service
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. -
Page 3: General Safety Information
GENERAL SAFETY INFORMATION PRECAUTIONS HYDROGEN GAS (FLAMMABLE) DO NOT USE THIS WATER HEATER IF ANY PART HAS BEEN EXPOSED TO FLOODING OR WATER DAMAGE. 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. -
Page 4: Table Of Contents
TABLE OF CONTENTS SAFE INSTALLATION, USE, AND SERVICE........2 Thermal Expansion ..............10 GENERAL SAFETY INFORMATION ............ 3 ELECTRICAL ..................11 Precautions .................. 3 General ..................11 Hydrogen Gas (Flammable) ............3 Branch Circuit ................11 INTRODUCTION .................. 4 Calculating Amperage/Overcurrent Protection ......11 Preparing for the Installation ............ -
Page 5: Dimensions And Capacities Data
DIMENSIONS AND CAPACITIES DATA FIGURE 1 TABLE 1 - ROUGH-IN DIMENSIONS Approx. Tank Capacity Models No. of Shipping Weight Dimensions Elements US Gals. Litres inches inches inches inches Lbs. Lowboy-6 15 1/2 14 1/4 15.9 Lowboy-10 18 1/4 12 1/2 24.5 Lowboy-15 20 1/2... -
Page 6: Approvals
APPROVALS All models are listed by Underwriters Laboratories Inc. MODEL AND RATING Lowboy-30/40/50 & Tall-30/40/52/66/80/120 Lowboy-6/10/15/20... -
Page 7: Features And Components
FEATURES AND COMPONENTS This page shows typical water heater installations by model designations. Lowboy 30/40/50 & All Tall Water Heaters Lowboy 6/10/15/20 INSTALL SUITABLE DRAIN PANS UNDER WATER HEATERS TO PREVENT DAMAGE DUE TO LEAKAGE. REFER TO WATER HEATER LOCATION ON PAGE 8. -
Page 8: Locating The New Water Heater
LOCATING THE NEW WATER HEATER FACTS TO CONSIDER ABOUT THE LOCATION Water heater life depends upon water quality, water pressure and the environment in which the water heater is installed. Water heaters are sometimes installed in locations where leakage may result in property damage, even with the use of a drain pan piped to a drain. -
Page 9: Installation
INSTALLATION REQUIRED ABILITY CONTAMINATED WATER Installation and service of this water heater requires ability equivalent This water heater shall not be connected to any heating system(s) to that of a qualified installer or service agency (page 2) in the or component(s) used with a non-potable water heating appliance. field involved. -
Page 10: Closed Water Systems
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. -
Page 11: Electrical
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. -
Page 12: Wiring Diagrams
WIRING DIAGRAMS A-8 CIRCUIT FOR DUAL ELEMENT HEATER C-2 CIRCUIT FOR Lowboy 6/10/15/20 HEATERS EQUIPPED WITH HIGH LIMIT CONTROL FACTORY WIRED ---------- FIELD WIRING † WHITE FOR 120V & 277V FIGURE 3... -
Page 13: Operation
OPERATION GENERAL INITIAL START UP The following checks should be made by the installer when the heater Refer to the Features and Components section of this manual (page is placed into operation for the first time. 7) for the location of components mentioned in the instructions that follow. -
Page 14: Temperature Regulation
TEMPERATURE REGULATION approximately the 140°F (60°C) setting. The over temperature device (ECO high limit) attached to each thermostat has a manual reset. 40A 120-277 VAC 25A.480-600 VAC 125VA.PT.DTY. 120-480 VAC APCOM 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 FIGURE 5 FIGURE 6... -
Page 15: Maintenance
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. -
Page 16: Troubleshooting Checklist
TROUBLESHOOTING CHECKLIST CHECKLIST ABNORMAL SOUNDS Before calling for service, check the following points to see if the 1. Sediment or lime scale accumulations on the elements causes cause of trouble can be identified and corrected. sizzling and hissing noises when the heater is operating. Reviewing this checklist may eliminate the need of a service call •... -
Page 17: Leakage Checkpoints
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. - Page 18 COMMERCIAL WATER HEATER LIMITED WARRANTY EFFECTIVE WHAT'S NOT COVERED For 3 Years, in the event of a tank leak, we will repair or, at our • Problems caused by improper: gas supply line sizing, gas type, discretion, replace the defective water heater. venting, connections, combustion air, voltage, wiring, or fusing For 1 Year, •...
-
Page 19: Notes
NOTES... -
Page 20: Repair Parts List
• PART DESCRIPTION The model number of your Water Heater will be found on the rating plated located above the lower access panel. Lowboy 6, 10, 15, 20 Series 102 (refer to repair parts table). DRAIN VALVE (not supplied with heater) - Page 21 Item Description Lowboy-6 Lowboy-10 Lowboy-15 Lowboy-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 ..
- Page 22 Item Description Lowboy-30 Lowboy-40 Lowboy-50 Tall-30 Tall-40 Tall-52 Tall-66 Tall-80 Tall-120 Series 110 Series 110 Series 110 Series 110 Series 110 Series 110 Series 110 Series 110 Series 110 1A ..Anode, Alum......9003944005 ..9003944005 ... 9003944005 ..9003944005 ...9003944005 ... 9003944005 ... 9000029005 ..9003892005 ..9003892005 1B ..Anode, Mag.(SMR P72)....
- Page 23 FIGURE 13 TABLE 6 - COPPER SHEATH ELEMENT AND WATTAGE CHART 120V 208V 240V 277V 480V ELEMENT K.W. WATTAGE PART NO. PART NO. PART NO. PART NO. PART NO. 1000W - - - 9002863115 90001431005 - - - - - - 1500W 9002963005 9000145005...