HTP Heavy Duty Electric Water Heater Installation guide

Heavy Duty

Commercial

ElectricWater Heaters

Installation

Start-Up

Maintenance

Parts

Warranty

CGE Models

050, 080, or 119 Gallon Capacities

Equipped with 3, 6, or 9 Elements

13,500 to 54,000 Watt Options

This manual must only be used by a qualied installer / service technician. Read all instructions in this manual before

installing. Perform steps in the given order. Failure to do so could result in substantial property damage, severe

personal injury, or death.

HTP reserves the right to make product changes or updates without notice and will not be held liable for typographical

errors in literature.

NOTE TO CONSUMER: PLEASE KEEP ALL INSTRUCTIONS FOR FUTURE REFERENCE.

272 Duchaine Blvd. New Bedford, MA 02745 www.htproducts.com

LP-437 Rev. 5.26.15

The surfaces of these products contacted by potable (consumable) water contain less than 0.25% lead by weight as

required by the Safe Drinking Water Act, Section 1417.

Improper installation, adjustment, alteration, service, or maintenance could void product warranty and cause

property damage, severe personal injury, or death.

LP-437 Rev. 5.26.15

2

The following dened terms are used throughout this manual

to bring attention to the presence of hazards of various risk

levels or to important product information.

DANGER indicates an imminently hazardous situation which,

if not avoided, will result in serious personal injury or death.

WARNING indicates a potentially hazardous situation which, if

not avoided, could result in personal injury or death.

CAUTION indicates a potentially hazardous situation which,

if not avoided, may result in moderate or minor personal injury.

CAUTION used without the safety alert symbol indicates

a potentially hazardous situation which, if not avoided, may

result in property damage.

NOTICE is used to address practices not related to personal

injury.

Foreword

This manual is intended to be used in conjunction with other

literature provided with the commercial electric water heater.

This includes all related control information. It is important

that this manual, all other

documents included in this

system, and additional

publications including the

Code for the Installation of

Heat Producing Appliances

and National Electric Code

- NFPA 70 (latest versions),

be reviewed in their entirety

before beginning any work.

Installation should be made

in accordance with the

regulations of the Authority

Having Jurisdiction, local

code authorities, and utility

companies which pertain to

this type of water heating

equipment.

Authority Having

Jurisdiction (AHJ) – The

AHJ may be a federal,

state, local government,

or individual such as a re

chief, re marshal, chief of

a re prevention bureau,

labor department or health

department, building ocial or electrical inspector, or others

having statutory authority. In some circumstances, the property

owner or his/her agent assumes the role, and at government

installations, the commanding ocer or departmental ocial

• DO NOT open the electrical junction box or the element

access panel before the power to the water heater is

turned “OFF”.

• DO NOT ATTEMPT to repair or replace any of the

electrical components installed on the water heater

before the power to the water heater is turned “OFF”.

• DO NOT USE the water heater on a voltage other than

that specied on the water heater rating plate.

• DO NOT CONNECT the power supply wiring to

anywhere other than the power distribution block in the

electrical junction box of the water heater.

• DO NOT TURN ON the power to the water heater

unless it is completely lled with water.

• DO NOT DRAIN the water heater unless the power to

the water heater has been turned “OFF”.

• DO NOT STORE or use gasoline or other ammable

vapors and liquids in the vicinity of this or any other

appliance.

WHAT TO DO IF YOU SMELL SMOKE

• Immediately turn “OFF” the power to the water heater.

• If after turning “OFF” the power the smoke continues,

call your local re department.

• When the smoke has stopped, call a qualied service

technician to identify and repair the problem.

Failure to follow the information provided in this warning

statement will result in property damage, serious personal

injury, or death.

may be the AHJ.

NOTE: HTP, Inc. reserves the right to modify product technical

specications and components without prior notice.

LP-437 Rev. 5.26.15

3

For the Installer

This water heater must be installed by qualied and licensed

personnel. The installer should be guided by the instructions

furnished with the water heater, and by local codes and

utility company requirements. In the absence of local codes,

preference should be given to the National Electric Code -

NFPA 70, latest version.

Installations Must Comply With:

Local, state, provincial, and national codes, laws, regulations,

and ordinances.

Code for the Installation of Heat Producing Appliances (latest

version) from American Insurance Association, 85 John Street,

New York, NY 11038.

The latest version of the National Electrical Code, NFPA No. 70.

Table of Contents

Part 1 - General Safety Information 3

A. When Servicing the Water Heating System 4

B. Heater Water 4

C. Freeze Protection 4

D. Water Temperature Adjustment 4

E. Water Chemistry Requirements 4

F. Handling 5

Part 2 - Installation Instructions 5

A. Locating the Water Heater 5

B. Minimum Clearances 6

C. Water Piping 6

1. Temperature and Pressure Relief Valve 6

2. Pressure Build-Up in a Water System 8

3. Filling the Water Heater 8

D. Electrical 11

1. Voltage 11

2. Field Conversions 21

Part 3 - Operating Instructions 23

A. Starting the Water Heater 23

B. Start-Up Procedure 23

C. Safety Controls 24

D. Water Temperature Regulation 24

Part 4 - General Maintenance 25

A. Housekeeping 25

B. Condensation 25

C. Cleaning Out the Water Heater 25

D. Element and Thermostat Replacement 25

E. Temperature and Pressure Relief Valve 26

F. Anode 26

G. Draining the Water Heater 26

H. Vacation 26

I. Getting Service for the Water Heater 26

Part 5 - Troubleshooting 31

Limited Warranty 33

Maintenance Notes 35

Customer Installation Record Form 36

For Your Records

Write the Product Model and Serial Numbers:

Model # ___________________________________________

Serial # ____________________________________________

These numbers are listed on the product ratings label.

Keep this manual and information for future reference.

Part 1 - General Safety Information

Installer - Read all instructions in this manual before installing.

Perform steps in the given order.

User - This manual is for use only by a qualied heating installer

/ service technician. Have this water heater serviced / inspected

annually by a qualied service technician.

FAILURE TO ADHERE TO THE GUIDELINES ON THIS PAGE

CAN RESULT IN SUBSTANTIAL PROPERTY DAMAGE,

SEVERE PERSONAL INJURY, OR DEATH.

DO NOT USE THIS WATER HEATER IF ANY PART HAS BEEN

SUBMERGED IN WATER. Immediately call a qualied service

technician. The water heater MUST BE replaced if it has been

submerged. Attempting to operate a water heater that has been

submerged could create numerous harmful conditions, such as

the release of mold, bacteria, or other harmful particulates into

the air. Operating a previously submerged water heater could

result in property damage, severe personal injury, or death.

NOTE: Water heater damage due to ood or submersion is

considered an Act of God, and IS NOT covered under product

warranty.

NOTE: Obey all local codes. Obtain all applicable permits

before installing the water heater.

NOTE: Install all system components and piping in such a

manner that does not reduce the performance of any re rated

assembly.

Altering any HTP, Inc. water heater with parts not manufactured

by HTP, Inc. WILL INSTANTLY VOID the water heater warranty

and could result in property damage, personal injury, or death.

This water heater has been designed to heat potable water

ONLY. Using this water heater to heat non-potable uid WILL

VOID product warranty, and could result in property damage,

personal injury, or death.

UNCRATING THE WATER HEATER - Any claims for damage

or shortage in shipment must be led immediately against the

transportation company by the consignee.

NOTE: If the water heater is exposed to the following, do not

operate. Immediately call a qualied service technician.

1. Fire

2. Damage

3. Water

Failure to follow this information could result in property

damage, severe personal injury, or death.

Verify that the voltage being supplied corresponds to that

which is marked on the water heater rating plate. Failure to do

so could result in severe personal injury, death or substantial

property damage.

Do not use this water heater for anything other than its intended

purpose (as described in this manual). Doing so could result in

property damage and WILL VOID product warranty.

LP-437 Rev. 5.26.15

4

High heat sources (sources generating heat 100

o

F / 37

o

C or

greater, such as stove pipes, space heaters, etc.) may damage

plastic components of the water heater as well as plastic vent

pipe materials. Such damages ARE NOT covered by warranty. It

is recommended to keep a minimum clearance of 8” from high

heat sources. Observe heat source manufacturer instructions,

as well as local, state, provincial, and national codes, laws,

regulations and ordinances when installing this water heater

and related components near high heat sources.

A. When Servicing the Water Heating System

To avoid electric shock, disconnect electrical supply before

performing maintenance.

NOTE: When inquiring about service or troubleshooting,

reference the model and serial numbers from the water heater

rating label.

To avoid severe burns, allow water heater and associated

equipment to cool before servicing.

B. Heater Water

Do not use petroleum-based cleaning or sealing compounds in

a water heating system. Gaskets and seals in the system may be

damaged. This can result in substantial property damage.

Do not use “homemade cures” or “patent medicines”. Damage

to the water heater, substantial property damage, and/or

serious personal injury may result.

C. Freeze Protection

NOTE: Consider piping and installation when determining

heater location.

Failure of the water heater due to freeze related damage IS

NOT covered by product warranty.

Be sure to disconnect electrical power before performing

service. Failure to do so could result in electrical shock, property

damage, serious personal injury, or death.

NEVER use any toxic chemical, including automotive, standard

glycol antifreeze, or ethylene glycol made for hydronic (non-

potable) systems. These chemicals can attack gaskets and seals

in water systems, are poisonous if consumed, and can cause

personal injury or death.

Households with small children, disabled, or elderly persons

may require a 120

o

F or lower temperature setting to prevent

severe personal injury or death due to scalding.

D. Water Temperature Adjustment

If the water heater is going to have a set temperature above

120

o

F, you must use an ASSE 1017 rated mixing valve to avoid

severe burns or death from scalding temperatures.

Approximate Time / Temperature Relationships in Scalds

120

o

F More than 5 minutes

125

o

F 1 1/2 to 2 minutes

130

o

F About 30 seconds

135

o

F About 10 seconds

140

o

F Less than 5 seconds

145

o

F Less than 3 seconds

150

o

F About 1 1/2 seconds

155

o

F About 1 second

Table 1 - Approximate Time / Temperature Relationships in Scalds

Outlined below are water quality parameters that need to be

met in order for the system to operate eciently for many years.

Water Hardness

Water hardness is mainly due to the presence of calcium and

magnesium salts dissolved in water. The concentration of these

salts is expressed in mg/L, ppm, or grains per gallon as a measure

of relative water hardness. Grains per gallon is the common

reference used in the US water heater industry. Hardness

expressed as mg/L or ppm may be divided by 17.1 to convert to

grains per gallon. Water may be classied as very soft, slightly

hard, moderately hard, or hard based on its hardness number.

The minerals in the water precipitate out as the water is heated

and cause accelerated lime scale accumulation on a heat transfer

surface. This lime scale build-up may result in premature failure

of the water heater. Operating temperatures above 135

o

F will

further accelerate the build-up of lime scale and may shorten

the service life of the water heater.

Water that is classied as hard and very hard must be softened

to avoid water heater failure.

CLASSIFICATION MG/L OR PPM GRAINS/GAL

Soft 0 - 17.1 0 - 1

Slightly Hard 17.1 - 60 1 - 3.5

Moderately Hard 60 - 120 3.5 - 7

Hard 120 - 180 7 - 10.5

Very Hard 180 and over 10.5 and over

If the hardness of the water exceeds the maximum level of 7

grains per gallon, the water should be softened to a hardness

level no lower than 5 grains per gallon. Water softened as low

as 0 to 1 grain per gallon may be under-saturated with respect

to calcium carbonate, resulting in water that is aggressive and

E. Water Chemistry Requirements

Chemical imbalance of the water supply may aect eciency

and cause severe damage to the water heater and associated

equipment. HTP recommends having water quality

professionally analyzed to determine whether it is necessary to

install a water softener. It is important that the water chemistry

on both the domestic hot water and central heating sides are

checked before installing the water heater, as water quality

will aect the reliability of the system. In addition, operating

temperatures above 135

o

F will further accelerate the build-up of

lime scale and may shorten the service life of the water heater.

Failure of a water heater due to lime scale build-up, low pH, or

other chemical imbalance IS NOT covered by the warranty.

Be sure to label all wires when servicing. Wiring errors could

result in severe personal injury, death or substantial property

damage.

LP-437 Rev. 5.26.15

5

F. Handling

Remove all sides of the shipping crate to allow the heater to

be moved into its installation location.

DO NOT use the shipping nipple for installation of the

plumbing ttings.

DO NOT hoist the heater by the hot outlet nipple.

COLD WEATHER HANDLING - If the water heater has

been stored in a very cold location (BELOW 0

o

F) before

installation, handle with care until the components come to

room temperature. Failure to do so could result in damage to

the water heater.

corrosive.

pH of Water

pH is a measure of relative acidity, neutrality, or alkalinity.

Dissolved minerals and gases aect water pH. The pH scale

ranges from 0 to 14. Water with a pH of 7 is considered neutral.

Water with pH lower than 7 is considered acidic. Water with a

pH higher than 7 is considered alkaline. A neutral pH (around

7) is desirable for most potable water applications. Corrosion

damage and tank failures resulting from water pH levels

of lower than 6 or higher than 8 ARE NOT covered by

warranty. The ideal pH range for water used in a water heater

is 7.2 to 7.8.

Total Dissolved Solids

Total Dissolved Solids (TDS) is a measurement of all minerals

and solids dissolved in a water sample. The concentration of

TDS is usually expressed in parts per million (ppm).

Water with a high TDS concentration will greatly accelerate

lime and scale formation in the hot water system. Most high

TDS concentrations precipitate out of the water when heated.

This can generate a scale accumulation that will greatly reduce

the service life of the water heater.

The manufacturer of the water heater has no control over

water quality, especially TDS levels in your system. TDS in

excess of 2000 ppm will accelerate lime and scale formation

on the element or the heat exchanger. Water heater failure

due to TDS in excess of 2000 ppm IS NOT covered by warranty.

Failure of a water heater due to lime scale build-up IS NOT

covered by warranty.

Hardness: Less than 7 grains

Chloride levels: Less than 100 ppm

pH levels: 6 - 8

TDS: Less than 2000 ppm

Sodium: Less than 20 mG/L

This water heater IS NOT design certied for installation in

a manufactured (mobile) home or for installation outdoors.

Failure to follow this warning could result in property damage,

severe personal injury, or death.

A. Locating the Water Heater

This water heater should be located in a clean, dry location,

as close as possible to the power supply and the main use

of hot water. This location must not be subject to freezing

temperatures. The water heater should be positioned so the

electrical junction box, element, and thermostat access panels

can be opened for inspection, adjustment, and servicing of the

elements and thermostats. The temperature and pressure relief

valve and drain valve must also be accessible.

All water heaters will leak. The manufacturer, based on

national building codes, has given the necessary instructions

to prevent damage to the building. Under no circumstances

is the manufacturer to be held liable for any water damage

in connection with this water heater. See Figure 2 for proper

installation.

Part 2 - Installation Instructions

Carefully consider installation when determining heater

location. Please read the entire manual before attempting

installation. Failure to properly take factors such as heater

piping and wiring into account before installation could result

in wasted time, money, and possible property damage and

personal injury.

The water heater is very heavy. Use caution when moving into

installation location. Failure to do so could result in severe

personal injury, death or substantial property damage.

The water heater must be located close to a suitable free-

owing oor drain. Where a oor drain is not adjacent to the

water heater, a suitable drain pan must be installed under the

water heater. See Figure 2 for proper installation. The drain pan

should be at least 4” (10.2 cm) larger than the diameter of the

water heater, and at least 1” (2.5 cm) deep, providing access to

the drain valve. This pan must not restrict the ow of ventilation

and combustion air. This pan must be piped to a suitable drain

to prevent damage to property in the event of a water leak

from the piping, the temperature and pressure relief valve, or

the water heater. Failure to follow this warning could result in

property damage, severe personal injury, or death.

This water heater is approved for installation on either a

combustible or non-combustible oor. However, should this

water heater be installed directly on carpeting, the carpeting

must be protected by a wood or metal panel beneath the water

heater. This panel must extend at least 3” (7.6 cm) beyond the

width and depth of the water heater. Should the water heater

be installed in an alcove or closet, the entire oor area must be

covered by the panel. The panel must be strong enough to carry

the weight of the water heater when it is full of water.

Failure of the water heater or components due to incorrect

operating conditions IS NOT covered by product warranty.

LP-437 Rev. 5.26.15

6

Figure 1 - Water Heater Dimensions - NOTE: All Dimensions Are Approximate

Table 2 - SpecicationsandDimensions

Model

Storage Capacity

Gal (Lit)

A B C D E F G Auxiliary Port

050 48.5 (183.6)

3 1/8”

40 3/16” 49 1/8”

4 7/8”

50 11/16” 26 1/4” 22”

N/A

080 73.7 (279) 51 3/8” 59 5/8” 60 7/8” 28 1/4” 24”

119 119 (450.5) 4” 56 7/16” 67 1/4” 6” 68 5/8” 32 7/16” 28 3/16” 6”

Locate the water heater where any leakage from the relief valve,

related piping, tank, or connections will not result in damage

to surrounding areas or lower oors of the building. The water

heater should be located near a oor drain or installed in a drain

pan. Leakage damages ARE NOT covered by warranty.

B. Minimum Clearances

The minimum clearances from combustible materials for this

water heater are: 30” (76.2 cm) from the front, and 12” (30.48

cm) from the top.

NOTE: If you do not provide these minimum clearances it might

not be possible to service the heater without removing it from

the space.

C. Water Piping

Refer to Figure 2 for a typical installation. Refer to Figures 3 -

8 for dierent installation congurations. Before making the

plumbing connections, locate the COLD water inlet and the

HOT water outlet. These ttings are both 1 ½” NPT male thread.

Install shut-o valves close to the water heater in both the hot

and cold water lines. It is recommended that unions be installed

in the cold and hot water lines so that the water heater can be

easily disconnected if service is required.

1. Temperature and Pressure Relief Valve

DO NOT plug the temperature and pressure relief valve or its

discharge line. DO NOT remove the relief valve. Make sure

the relief valve is properly sized for the water heater. If the

relief valve continuously discharges water, call a qualied

service technician to correct the problem. Failure to follow

these instructions can result in property damage, personal

injury, or death.

To protect from excessive pressure and/or temperature, the

manufacturer has installed a temperature and pressure relief

NOTE: It is recommended to use dielectric unions when

connecting to the water heater.

When assembling the hot and cold piping, use food grade

pipe joint compound and ensure all ttings are tight. DO NOT

apply open ame to the inlet and outlet ttings, as heat will

damage or destroy the plastic lined ttings. This will result

in premature failure of the ttings, which is not covered by

warranty.

Use pipe sizes adequate to handle the expected ow and

volume of water. Copper tubing or galvanized pipe should

be used. After cutting pipe or tubing, clean out all chips and

cuttings before making any connections.

LP-437 Rev. 5.26.15

7

Figure 2 - Typical Installation - Drawing meant only to demonstrate system piping concept.

To avoid water damage or scalding due to relief valve

operation:

• Discharge line must be connected to relief valve outlet

and run to a safe place of disposal. Terminate the

discharge line in a manner that will prevent possibility

of severe burns or property damage should the relief

valve discharge.

• Discharge line must be as short as possible and

the same size as the valve discharge connection

throughout its entire length.

• Discharge line must pitch downward from the valve

and terminate at least 6” above the oor drain, making

discharge clearly visible.

• The discharge line shall terminate plain, not threaded,

with a material serviceable for temperatures of 375

o

F

or greater.

• Do not pipe discharge to any location where freezing

could occur.

• No valve may be installed between the relief valve and

heater or in the discharge line. Do not plug or place any

obstruction in the discharge line.

• Test the operation of the relief valve after lling and

pressurizing the system by lifting the lever. Make sure

the valve discharges freely. If the valve fails to operate

correctly, immediately replace with a new properly rated

relief valve.

• Test T&P valve at least once annually to ensure the

waterway is clear. If valve does not operate, turn the

heater “o” and call a plumber immediately.

• Take care whenever operating relief valve to avoid

scalding injury or property damage.

FAILURE TO COMPLY WITH THE ABOVE GUIDELINES

COULD RESULT IN FAILURE OF RELIEF VALVE OPERATION,

RESULTING IN POSSIBILITY OF SUBSTANTIAL PROPERTY

DAMAGE, SEVERE PERSONAL INJURY, OR DEATH.

Do not thread a cap or plug into the relief valve or relief valve

line under any circumstances! Explosion and property damage,

serious injury, or death may result.

valve that meets the requirements of the Standard for Relief

Valves and Automatic Gas Shut-O Devices for Hot Water

Supply Systems, ANSI Z21.22 in the United States, and CSA

4.4 in Canada. This relief valve has a maximum set pressure

that does not exceed the hydrostatic working pressure of the

water heater (150 psi = 1,035 kPa) and a BTU/H rating equal to

or greater than the input rating, as shown on the water heater

rating plate. It should never be plugged or removed from the

opening marked for it on the water heater.

If this relief valve should need to be replaced, use only a new

temperature and pressure relief valve. Never install an old

or existing relief valve, as it may be damaged or inadequate

for the working requirements of the new water heater. This

new relief valve must meet all local codes, or, at minimum,

the requirements listed above. Never install any other type of

valve between the relief valve and the water heater.

LP-437 Rev. 5.26.15

8

NEVER operate the water heater unless it is completely full of

water. Failure to follow this instruction can result in premature

failure of the water heater. Such failure IS NOT covered by

warranty.

3. Filling the Water Heater

Check that all the water piping connections have been made.

To ll the water heater:

1. Make sure that the water heater drain valve is closed

by inserting a at head screwdriver into the slot in the

head of the drain valve and turning the knob clockwise.

2. Open the cold water supply manual shut-o valve. This

valve must remain open as long as the water heater is

in use. NEVER operate the water heater with the cold

water supply manual shut-o valve closed.

3. To make sure the water heater is completely full of

water, open hot water faucets to let the air out of the

water heater and plumbing system. Leave the faucets

open until a constant ow of water is obtained.

4. Check all of the plumbing connections to make sure

there are no leaks.

2. Pressure Build-Up in a Water System

When the water heater

operates, the heated

water expands creating

a pressure build-up. This

is a natural function and

is one of the reasons for

installing a temperature

and pressure relief valve.

For example: 100 gallons

of water will expand

by approximately 2

gallons over a 100

o

F

temperature rise.

If the cold water supply

line has a built-in water

meter, check valve, or

pressure-reducing valve,

a suitable expansion

tank must be installed to

prevent pressure build-

up or water hammer

eect. Otherwise, the

warranty is void. An

indication of pressure

build-up is frequent relief

valve discharge. If the

relief valve discharges

water on a continuous

basis, it may indicate a

malfunction of the relief

valve and a qualied

service technician must

be called to have the

system checked and the

problem corrected.

RE-INSPECTION OF T&P RELIEF VALVES: T&P valves should

be inspected AT LEAST ONCE EVERY THREE YEARS, and

replaced if necessary, by a licensed plumbing contractor or

qualied service technician to ensure that the product has not

been aected by corrosive water conditions and to ensure that

the valve and discharge line have not been altered or tampered

with illegally. Certain naturally occuring conditions may corrode

the valve and its components over time, rendering the valve

inoperative. Such conditions can only be detected if the valve

and its components are physically removed and inspected.

Do not attempt to conduct an inspection on your own.

Contact your plumbing contractor for a re-inspection to assure

continued safety.

FAILURE TO RE-INSPECT THE T&P VALVE AS DIRECTED

COULD RESULT IN UNSAFE TEMPERATURE AND/OR

PRESSURE BUILD-UP WHICH CAN RESULT IN PROPERTY

DAMAGE, SERIOUS PERSONAL INJURY, OR DEATH.

Failure to account for expansion could result in property

damage, severe personal injury, or death. Failure of the product

due to expansion IS NOT covered by warranty.

Figure 3 - Two Temperature with Mixing Valve and Two Tanks in Parallel - NOTE: Drawing meant only to

demonstrate system piping concept.

LP-437 Rev. 5.26.15

9

Figure 4 - Water Heater with Storage Tank - NOTE: Drawing meant only to demonstrate system piping concept.

Figure 5 - Two Water Heaters - NOTE: Drawing meant only to demonstrate system piping concept.

LP-437 Rev. 5.26.15

10

Figure 6 - Two Water Heaters with Storage Tank - NOTE: Drawing meant only to demonstrate system piping concept.

Figure 7 - Three Water Heaters - NOTE: Drawing meant only to demonstrate system piping concept.

Figure 8 - Three Water Heaters with Storage Tank - NOTE: Drawing meant only to demonstrate system piping concept.

LP-437 Rev. 5.26.15

11

D. Electrical

This water heater uses an external electrical source for

power. It must be electrically grounded in accordance with

all local codes, or, in the absence of local codes, the latest

edition of the National Electrical Code, ANSI/NFPA 70 in the

United States, or CAN/CSA C22.1, Canadian Electrical Code,

in Canada. Failure to properly ground the water heater can

result in property damage, personal injury, or death.

This water heater must be connected on a separate fuse

branch circuit. Check the water heater rating plate for the

element wattage and voltage and make sure that the power

supply wiring and the fusing or circuit breaker are the correct

size for this water heater. See Table 3. Verify that all of the

wire connections on the element and thermostat have been

installed correctly, are secure, and that none of the wires are

grounded, have split, or are broken (see Wiring Diagram). If

any of the original wiring needs replacing, use only TEW type

wire that is approved for 221

o

F (105

o

C) of the same size or

greater. To hook up the water heater to the power supply,

connect the power supply wiring to the power distribution

block in the electrical junction box.

Total

Input, kW

# of

Elements

Element

Input

Voltage

208 240 277 480 600

1 ph 3 ph 1 ph 3 ph 1 ph 1 ph 3 ph 3 ph

13.5

3

4.5 64.9 37.5 56.3 32.5 48.7 28.1 16.2 13

15 5 72.1 41.6 62.5 36.1 54.2 31.3 18 14.4

18 6 - - 75 43.3 65 37.5 21.7 17.3

18

6

3 86.5 50 75 43.3 65 37.5 21.7 17.3

24 4 115.4 66.6 100 57.7 86.6 50 28.9 23.1

27 4.5 129.8 74.9 112.5 65 97.5 56.3 32.5 26

30 5 144.2 83.3 125 72.2 108.3 62.5 36.1 28.9

36 6 - - 150 86.6 130 75 43.3 34.6

36

9

4 173.1 99.9 150 86.6 130 75 43.3 34.6

405. 4.5 194.7 112.4 168.8 97.4 146.2 84.4 48.7 39

45 5 216.3 124.9 187.5 108.3 162.5 93.8 54.1 43.3

54 6 - - 255 129.9 194.9 112.5 65 52

1. Voltage

When a control transformer is installed in the electrical

junction box, make sure that the voltage on the connection of

the transformer primary circuit is the same as the voltage on

the rating plate of the water heater.

Figure 9 - A - 600V, B - All Other Voltages

Table 3 - Total Full Load Current in Amperes

LP-437 Rev. 5.26.15

12

Figure 10 - 3 Element, 208 - 480V

LP-437 Rev. 5.26.15

13

Figure 11 - 6 Element, 208 - 480V Models

LP-437 Rev. 5.26.15

14

Figure 12 - 9 Element, 208 - 480V

LP-437 Rev. 5.26.15

15

Figure 13 - 3 Element, 208 - 480V, 119 Gallon Models

LP-437 Rev. 5.26.15

16

Figure 14 - 9 Element, 208 - 480V, 119 Gallon Models

LP-437 Rev. 5.26.15

17

Figure 15 - 3 Element, 600V, 050 or 080 Gallon Models

Figure 16 - 6 Element, 600V, 050 or 080 Gallon Models

LP-437 Rev. 5.26.15

18

Figure 17 - 9 Element, 600V, 050 or 080 Gallon Models

LP-437 Rev. 5.26.15

19

Figure 18 - 3 Element, 600V, 119 Gallon Models

LP-437 Rev. 5.26.15

20

Figure 19 - 9 Element, 600V, 119 Gallon Models

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HTP Heavy Duty Electric Water Heater Installation guide

HTP Heavy Duty Electric Water Heater Installation guide

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