A.O. Smith LTE 66D, LTE 80D, LTE 120D Installation Manual

Instruction Manual

COMMERCIAL ELECTRIC WATER HEATERS

MODELS LTE 66D, LTE 80D & LTE 120D, Series 200

INSTALLATION - OPERATION - SERVICE

- MAINTENANCE - LIMITED WARRANTY

500 Tennessee Waltz Parkway

Ashland City, TN 37015

Thank you for buying this energy efcient water heater. We appreciate your condence in our products.

PLACE THESE INSTRUCTIONS ADJACENT TO HEATER AND NOTIFY OWNER TO KEEP FOR FUTURE REFERENCE.

PRINTED 0316 100270491

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. It is very important that the meaning of each safety message is understood by you and others who install, use, or service this water heater.

This is the safety alert symbol. It is used to alert you to potential personal injury hazards. Obey all safety messages that follow this symbol to avoid possible injury or death.

DANGER indicates an imminently hazardous

DANGER

WARNING

CAUTION

situation which, if not avoided, will result in death or injury.

WARNING indicates a potentially hazardous situation which, if not avoided, could result in death or injury.

CAUTION indicates a potentially hazardous situation which, if not avoided, could result in minor or moderate injury.

CAUTION used without the safety alert

CAUTION

All safety messages will generally tell you about the type of hazard, what can happen if you do not follow the safety message, and how to avoid the risk of injury.

symbol indicates a potentially hazardous situation which, if not avoided, could result in property damage.

IMPORTANT DEFINITIONS

•  QualiedInstallerorServiceAgency:

Installation and service of this water heater requires ability equivalent to that of a Qualied Agency (as dened by ANSI below) in the

eld involved. Installation skills such as plumbing, electrical supply are required in addition to electrical testing skills when performing service.

•  ANSIZ223.12006Sec.3.3.83:

“Qualied Agency” - “Any individual, rm, corporation or company that either in person or through a representative is engaged in and is

responsible for (a) the installation, testing or replacement of gas piping or (b) the connection, installation, testing, repair or servicing of appliances and equipment; that is experienced in such work; that is familiar with all precautions required; and that has complied with all the requirements of the authority having jurisdiction.”

GENERAL SAFETY INFORMATION

Improper installation, use and service may

result in property damage.

CAUTION

• Do not operate water heater if any part has been

exposed to flooding or water damage.

•

Inspect anode rods regularly, replace when significantly depleted.

• Install in location with drainage.

• Fill tank with water before operation.

•

Properly sized thermal expansion tanks are required on all

closed water systems.

Refer to this manual for installation and service.

PRECAUTIONS

DO NOT USE THIS WATER HEATER IF ANY PART HAS BEEN EXPOSED TO FLOODING OR WATER DAMAGE. Immediately call a qualied 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 qualied service technician.

1. External re.

2. Damage.

3. Firing without water.

GROUNDING INSTRUCTIONS

This water heater must be grounded in accordance with the National Electrical Code and/or local codes. These must be followed in all cases. Failure to ground this water heater properly may also cause erratic control system operation on ELECTRONIC CONTROL models.

This water heater must be connected to a grounded metal, permanent wiring system; or an equipment grounding conductor must be run with the circuit conductors and connected to the equipment grounding terminal or lead on the water heater.

When servicing this unit, verify the power to the unit is turned off prior to opening the control cabinet door.

HYDROGEN GAS (FLAMMABLE)

Hydrogen gas can be produced in a hot water system served by this heater that has not been used for a long period of time (generally two weeks or more). Hydrogen gas is extremely ammable. risk of injury under these conditions, it is recommended that the hot water faucet be opened for several minutes at the kitchen sink before using any electrical appliance connected to the hot water system. If hydrogen is present there will probably be an unusual sound such as air escaping through the pipe as the water begins to ow. OR OPEN FLAME NEAR THE FAUCET AT THE TIME IT IS OPEN.

THERE SHOULD BE NO SMOKING

To reduce the

TABLE OF CONTENTS

SAFE INSTALLATION, USE, AND SERVICE....................................... 2

GENERAL SAFETY INFORMATION .................................................... 3

Precautions .................................................................................. 3

Hydrogen Gas (Flammable) ......................................................... 3

INTRODUCTION .................................................................................. 4

Preparing for the Installation ........................................................ 4

DIMENSIONS AND CAPACITIES DATA .............................................. 5

APPROVALS ........................................................................................ 6

MODEL AND RATING .......................................................................... 6

FEATURES AND COMPONENTS ....................................................... 7

LOCATING THE NEW WATER HEATER ............................................. 8

Facts to Consider About the Location .......................................... 8

Clearances ................................................................................... 8

INSTALLATION .................................................................................... 9

Required Ability ............................................................................ 9

General ......................................................................................... 9

Contaminated Water ..................................................................... 9

Circulating Pump .......................................................................... 9

Insulation Blankets ....................................................................... 9

Temperature-Pressure Relief Valve .............................................. 9

Closed Water Systems ............................................................... 10

Thermal Expansion .................................................................... 10

INTRODUCTION

ELECTRICAL ......................................................................................11

General ........................................................................................11

Branch Circuit ..............................................................................11

Calculating Amperage/Overcurrent Protection ............................11

WIRING DIAGRAMS .......................................................................... 12

OPERATION ....................................................................................... 13

General ....................................................................................... 13

Filling the Water Heater .............................................................. 13

Initial Start Up ............................................................................. 13

Draining the Water Heater .......................................................... 13

TEMPERATURE REGULATION ........................................................ 14

Temperature Adjustment ............................................................ 14

MAINTENANCE ................................................................................. 15

General ....................................................................................... 15

Anode Rod Inspection ................................................................ 15

TROUBLESHOOTING CHECKLIST .................................................. 16

Checklist ..................................................................................... 16

Leakage Checkpoints ................................................................. 17

WARRANTY ....................................................................................... 18

Repair Parts List ......................................................................... 19

NOTES ............................................................................................... 21

Thank You for purchasing this water heater. Properly installed and maintained, it should give you years of trouble free service.

Abbreviations Found In This Instruction Manual:

• ANSI - American National Standards Institute

• AHRI - Air-Conditioning, Heating and Refrigeration Institute

• NEC - National Electrical Code

• NFPA - National Fire Protection Association

• UL - Underwriters Laboratory

PREPARING FOR THE INSTALLATION

1. Read the “General Safety Information” section of this manual

rst and then the entire manual carefully. If you don’t follow the safety rules, the water heater may not operate safely. It could cause DEATH, SERIOUS BODILY INJURY AND/OR PROPERTY DAMAGE.

This manual contains instructions for the installation, operation,

and maintenance of the electric water heater. It also contains warnings throughout the manual that you must read and be aware of. All warnings and all instructions are essential to the proper operation of the water heater and your safety. READ

THE ENTIRE MANUAL BEFORE ATTEMPTING TO INSTALL OR OPERATE THE WATER HEATER.

Be sure to turn off power when working on or near the

electrical system of the heater. Never touch electrical components with wet hands or when standing in water.

When replacing fuses always use the correct size for the circuit, see tables on page 11.

The model and rating plates on page 6 interprets certain

markings into useful information. Both of these references should be used to identify the heater, its components and optional equipment.

2. The installation must conform with these instructions and the

local code authority having jurisdiction and the requirements of the power company. In the absence of local codes, the installation must comply with the latest editions of the National Electrical Code, NFPA 70 or the Canadian Electrical Code CSA C22.1. The National Electrical Code may be ordered from: National Fire Protection Association, 1 Batterymarch Park, Quincy, MA 02269. The Canadian Electrical Code is available from the Canadian Standards Association, 8501 East Pleasant Valley Road, Cleveland, OH 44131.

3. If after reading this manual you have any questions or do not

understand any portion of the instructions, call the toll free number listed on the back cover of this manual for technical assistance.

A sample rating plate is shown on page 6 of this manual. In

order to expedite your request, please have full model and serial number available for the technician.

4. Carefully plan your intended placement of the water heater.

Examine the location to ensure the water heater complies with the “Locating the New Water Heater” section in this manual.

Installation and service of this water heater requires ability

equivalent to that of a licensed tradesman or qualied agency (page 2) in the eld involved. Plumbing and electrical work are required.

DIMENSIONS AND CAPACITIES DATA

HOT CONNECTION

ANODE ROD

COLD CONNECTION

FIGURE 1

TABLE 1 - ROUGH-IN DIMENSIONS

Capacity A B C

US Gals. Litres Inches cm Inches cm Inches cm Lbs. Kg.

66 250 60.13 153 52.75 134 22 56 146 66.22

80 303 60.50 154 52.25 133 24 61 174 78.93

119 450 61.38 156 54.38 138 28 71 268 121.56

Approx.

Shipping Weight

TABLE 2 - RECOVERY CAPACITIES

Element Wattage

(Upper/Lower)

NON-SIMULATANEOUS

3000/3000 GPH 34 30 23 20 17 15 14 12 11 10 10

4000/4000 GPH 45 41 30 27 23 20 18 16 15 14 13

4500/4500 GPH 51 46 34 30 25 23 20 18 17 15 14

5000/5000 GPH 56 51 38 34 28 25 23 20 19 17 16

SIMULATANEOUS OPERATION

3000/3000 GPH 68 61 45 41 34 30 27 24 23 20 19

4000/4000 GPH 90 81 60 54 45 41 36 32 30 27 26

4500/4500 GPH 101 91 68 61 51 46 41 36 34 30 29

5000/5000 GPH 11 3 101 75 68 56 51 45 41 38 34 32

Recovery capacities at 100° F rise equal: for non-simultaneous element operation = 4.1 gal. x KW of one element; for simultaneous element operation = 4.1 gal. x 2/3 KW of both elements. For other rises multiply element KW as previously explained by 410 and divide by temperature rise. Full load current for single phase = total watts : voltage.

U.S. Gallons/Hr and Litres/Hr at TEMPERATURE RISE INDICATED

INPUT

F° 36F° 40F° 54F° 60F° 72F° 80F° 90F° 100F° 108F° 120F° 126F° C° 20C° 22.2C° 30C° 33.3C° 40C° 44.4C° 50C° 55.5C° 60C° 66.6C° 70C°

3.0 LPH 128 115 85 77 64 58 51 46 43 38 37

4.0 LPH 170 153 114 102 85 77 68 61 57 51 49

4.5 LPH 192 173 128 11 5 96 86 77 69 64 58 55

5.0 LPH 213 192 142 128 107 96 85 77 71 64 61

6 LPH 256 230 170 153 128 115 102 92 85 77 73

8 LPH 341 307 227 205 170 153 136 123 114 102 97

9 LPH 384 345 256 230 192 173 153 138 128 115 11 0

10 LPH 426 384 284 256 213 192 170 153 142 128 122

APPROVALS

All models are listed by

Underwriters Laboratories Inc.

MODEL AND RATING

COMMERCIAL STORAGE

TANK WATER HEATER

22U1

MODEL NUMBER

PHASE

1 PH 3 PH

WATTS UPPER

WATTS

LOWER

RATED MEASURED

VOLTS - AC

TOTAL WATTS CONNECTED

INTERLOCK SIMULTANEOUS CAPACITY US GAL STANDBY LOSS

1 PH / 3 PH

SERIAL NUMBER

CIRCUIT

MAX WORKING PRESSURE PSI

ITEM ID / PART NUMBER

WATTS

LLC

FEATURES AND COMPONENTS

ANODE

COLD

ELECTRICAL

JUNCTION BOX

(ACCESS PANEL)

ACCESS

PANELS

DRAIN VA LVE

INSTALL SUITABLE DRAIN PANS UNDER WATER HEATERS TO PREVENT DAMAGE DUE TO LEAKAGE. REFER TO WATER HEATER LOCATION ON PAGE 8.

INSTALL THERMAL EXPANSION TANK IF CHECK VALVE OR PRESSURE REDUCING VALVE IS USED IN SUPPLY LINE.

INSTALL VACUUM RELIEF IN COLD WATER INLET LINE AS REQUIRED BY LOCAL CODES.

FIGURE 2

LOCATING THE NEW WATER HEATER

FACTS TO CONSIDER ABOUT THE LOCATION

The water heater should be located as close as possible to/or centralized to the water piping system. The water heater should be located in an area not subject to freezing temperatures.

The water heater should be located in an area where leakage of the tank or connections will not result in damage to the area adjacent to the heater or to lower oors of the structure.

When such locations cannot be avoided, a suitable drain pan should be installed under the heater.

Such pans should be at least two inches deep, have a minimum length and width of at least two inches greater than the diameter of the heater and should be piped to an adequate drain.

Drain pans suitable for these water heaters are available from your distributor or A.O. Smith Water Heater Parts Fulllment, 125 Southeast Parkway, Franklin, TN 37068.

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. 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.

• Sensors mounted in the drain pan that turn off the water supply to the entire home when water is detected in the drain pan.

• Water supply shut-off devices that activate based on the water pressure differential between the cold water and how water pipes connected to the water heater.

• Devices that will turn off the gas supply to a gas water heater while at the same time shutting off its water supply.

CLEARANCES

A minimum clearance of 4” must be allowed for access to replaceable parts such as thermostats, drain valve and relief valve.

Adequate clearance for servicing this water heater should be considered before installation, such as changing the anodes, etc.

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