Light Duty Commercial Electric Water Heater
USE & CARE MANUAL
®
LISTED
786H
WITH INSTALLATION INSTRUCTIONS FOR THE INSTALLER
The purpose of this manual is twofold: one, to provide the installer with
the basic directions and recommendations for the proper installation
and adjustment of the water heater; and two, for the owner–operator,
to explain the features, operation, safety precautions, maintenance and
troubleshooting of the water heater. This manual also includes a parts list.
It is imperative that all persons who are expected to install, operate
or adjust this water heater read the instructions carefully so they may
understand how to perform these operations. If you do not understand
these instructions or any terms within it, seek professional advice.
Any questions regarding the operation, maintenance, service or warranty
of this water heater should be directed to the seller from whom it was
purchased. If additional information is required, refer to the section on
“How to obtain service assistance.”
!
Do Not Destroy this Manual. Please read carefully and keep in a safe
place for Future Reference.
!
Recognize this symbol as an Indication of Important Safety Information!
!
NOTICE: This water heater is designed for use in a commercial application and the installation and maintenance of it should be performed by qualified, licensed service personnel. If the foregoing assumption is not appropriate, then we recommend that you obtain and retain our Residential Use
& Care Manual.
!
CALIFORNIA PROPOSITION 65 WARNING: This product contains chemicals known to the State of California to cause cancer, birth defects or other
reproductive harm.
Printed in USA
AP11564-11 (08/13)
Safety Information
Safety Precautions. . . . . . . 3
FOR YOUR RECORDS
Write the model and serial numbers here:
#
#
You can find them on a label on the appliance.
Staple sales slip or cancelled check here.
Installation Instructions
Location . . . . . . . . . . . . . . . 4
Proof of the original purchase date is needed to obtain service under
the warranty.
Water Connections. . . . . . . 4
Electrical Connections. . 5, 6
Operating Instructions
Safety Controls. . . . . . . . . . 7
Water Temperature. . . . . . . 7
READ THIS MANUAL
Inside you will find many helpful hints on how to use and maintain
your water heater properly. Just a little preventive care on your part
can save you a great deal of time and money over the life of your
water heater.
You’ll find many answers to common problems in the Before You Call
For Service section. If you review our chart of Troubleshooting Tips
first, you may not need to call for service at all.
READ THE SAFETY INFORMATION
Care and Cleaning
Long Time Shut-Down. . . . 8
Your safety and the safety of others are very important.
There are many important safety messages in this
manual and on your appliance. Always read and obey all
safety messages.
Draining. . . . . . . . . . . . . . . . 8
!
Maintenance. . . . . . . . . . . . 8
Troubleshooting Tips
Troubleshooting
Guide . . . . . . . . . . . . . . . . . 9
Parts List. . . . . . . . . . . . . . 10
Wiring Diagram. . . . . . . .
12
his symbol alerts you to potential hazards that
T
can kill or hurt you and others.
All safety messages will follow the safety alert symbol
and either the word “DANGER”, “WARNING”, “CAUTION”
or “NOTICE”.
These words mean:
An imminently hazardous situation
! DANGER
that will result in death or serious
injury.
!
A potentially hazardous situation
WARNING
!
CAUTION
A potentially hazardous situation
Customer Service
How to Obtain
Service Assistance. . . . . . . 9
This is the safety alert symbol. Recognize this
symbol as an indication of Important Safety
Information!
that could result in death or
serious injury and/or damage to
property.
that may result in minor or
moderate injury.
Attention is called to observe a
Notice:
specified procedure or maintain a specific condition.
! General Safety Precautions
Be sure to read and understand the entire Use & Care Manual before attempting to install or operate this water heater. Pay particular attention to the following
General Safety Precautions. Failure to follow these warnings could result in serious bodily injury or death . Should you have any problems understanding the
instructions in this manual, STOP, and get help from a qualified installer or service technician or the local utility.
To meet commercial water use needs, the thermostat on this water heater
is adjustable to deliver water up to 170°F. However, water temperatures over
125°F. can cause severe burns instantly or death from scalds. This is the
preferred starting point for setting the control for supplying general purpose
hot water.
The following chart details the relationship of water temperature and time
with regard to scald injury and may be used as a guide in determining the
safest water temperature for your applications.
The temperature of the water in the heater can be regulated by adjusting
the thermostat. To comply with safety regulations the thermostat was set
at the factory to a setting corresponding to 120°F (49°C).
Time / Temperature Relationships in Scalds
DANGER
HOT
Temperature
Time to Produce Serious Burn
120°F (49°C)
More than 5 minutes
125°F (52°C)11/2 to 2 minutes
130°F (54°C)
About 30 seconds
135°F (57°C)
About 10 seconds
140°F (60°C)
Less than 5 seconds
145°F (63°C)
Less than 3 seconds
150°F (66°C)
About 11/2 seconds
155°F (68°C)
About 1 second
Table courtesy of Shriners Burn Institute
ESE
ESE
R
T
R
Reset Button
T
!
Maximum water temperatures occur just after the thermostat has shut off
the elements. To find the hot water temperature being delivered, turn on a hot
water faucet and place a thermometer in the hot water stream and read the
thermometer.
BURN
Thermostat Dial
Pointer
Water temperature over 125°F can
cause severe burns instantly or
death from scalds.
110
170
120
160
150
140 130
TURN OFF
POWER
BEFORE
SERVICING
Children, disabled and elderly are
at highest risk of being scalded.
See instruction manual before
setting temperature at water
heater.
Feel water before bathing or
showering.
Temperature limiting valves are
available, see manual.
Thermostat Protective
Cover
CAUTION!! — Hotter water increases the risk of SCALDING!
The illustration above shows the temperature adjustment dial used for
setting the water temperature. Refer to Operation section of this manual
for detailed instructions in how to adjust the thermostat(s).
Hotter water increases the potential for Hot Water SCALDS.
! DANGER
NOTICE: When this water heater is supplying general purpose hot water
requirements for use by individuals, a thermostatically controlled mixing valve
for reducing point of use water temperature is recommended to reduce the
risk of scald injury. Contact a licensed plumber or the local plumbing authority
for further information.
Safety and energy conservation are factors to be considered when setting
the water temperature on the thermostat. The most energy efficient operation
will result when the temperature setting is the lowest that satisfies the needs
consistent with the application.
3
Introduction
The location chosen for the water heater must take into consideration the
following:
! CAUTION
The water heater should not be located in an area where leakage of the
tank or connections will result in damage to the area adjacent to it or to
lower floors of the structure. Where such areas cannot be avoided, it is
recommended that a suitable catch pan, adequately drained, be installed
under the water heater.
LOCAL INSTALLATION REGULATIONS
This water heater must be installed in accordance with these instructions,
local codes, utility company requirements or, in the absence of local codes,
the latest edition of the National Electrical Code. It is available from some
local libraries or can be purchased from the National Fire Prevention
Association, 1 Batterymarch Park, Quincy, MA 02269 as booklet ANSI/NFPA
70. In Canada, use the latest edition of the Canadian Electric Code.
NOTICE: Auxiliary catch pan installation MUST conform to local
codes.
LOCATION
Locate the water heater in a clean dry area as near as practical to the
area of greatest heated water demand. Long uninsulated hot water lines
can waste energy and water. Place the water heater in such a manner
that the thermostat and element access panels can be removed to permit
inspection and servicing such as removal of elements or checking controls.
The water heater and water lines should be protected from freezing
temperatures. Do not install the water heater in outdoor, unprotected areas.
B
A —Diameter of water
heater plus 2" (5 cm)
min.
B — Maximum 2" (5 cm)
A
To open drain, line should
be at least 3/4" (1.9cm) ID
and pitched for proper
drainage.
Figure 1. — Auxiliary Catch Pan
Make certain the floor underneath the water heater is strong
enough to sufficiently support the weight of the water heater once it
is filled with water.
Catch Pan Kits are available from the distributor or store where the
water heater was purchased.
Installation
1. INSPECT SHIPMENT — Inspect the water heater for possible damage.
Check the markings on the rating plate of the water heater to be certain
the power supply corresponds to that for which the water heater is
equipped.
2. THERMAL EXPANSION — Determine if a check valve exists in the
inlet water line. It may have been installed in the cold water line as a
separate back flow preventer, or it may be part of a pressure reducing
valve, water meter or water softener. A check valve located in the
cold water inlet line can cause what is referred to as a ”closed water
system”. A cold water inlet line with no check valve or back flow
prevention device is referred to as an ”open” water system.
As water is heated, it expands in volume and creates an increase in
the pressure within the water system. This action is referred to as
”thermal expansion”. In an ”open” water system, expanding water
which exceeds the capacity of the water heater flows back into the city
main where the pressure is easily dissipated.
A ”closed water system”, however, prevents the expanding water
from flowing back into the main supply line, and the result of ”thermal expansion” can create a rapid, and dangerous pressure increase in the water heater and system piping. This rapid pressure
increase can quickly reach the safety setting of the relief valve,
causing it to operate during each heating cycle. Thermal expansion,
and the resulting rapid, and repeated expansion and contraction
of components in the water heater and piping system can cause
premature failure of the relief valve, and possibly the heater itself.
Replacing the relief valve will not correct the problem!
The suggested method of controlling thermal expansion is to install an
expansion tank in the cold water line between the water heater and
the check valve. (refer to Figure 2.) The expansion tank is designed
with an air cushion built in that compresses as the system pressure
increases, thereby relieving the over pressure condition and eliminating the repeated operation of the relief valve. Other methods of
controlling thermal expansion are also available. Contact your installing
contractor, water supplier, or plumbing inspector for additional information regarding this subject.
NOTICE!! Do not apply heat to the hot or cold heat trap fittings. If
sweat connections are used, sweat tubing to adapter before fitting
adapter to water connections on heater. Any heat applied to the water
connections will permanently damage the heat trap fittings.
WATER SUPPLY CONNECTIONS — Refer to Fig. 2 for suggested typical
installation. The installation of unions or flexible copper connectors is
recommended on the hot and cold water connections so that the water
heater may be easily disconnected for servicing if necessary. The HOT
and COLD water connections are clearly marked and are 3/4” NPT on
all models. Install a shut-off valve in the cold water line near the water
heater.
3. RELIEF VALVE — A new combination pressure and temperature
relief valve, complying with the Standard for Relief Valves and Automatic Gas Shutoff Devices for Hot Water Supply Systems, ANSI
Z21.22, must be installed in the opening provided and marked for
the purpose on the water heater. (Refer to Fig. 2.) No valve of any
type should be installed between the relief valve and the tank. Local
codes shall govern the installation of relief valves.
4
Installation
Union
Heat trap
6" (15.24 cm)
minimum
Temperature
&
Pressure
Relief Valve
Cover and Label
Ground
Screw
Union
WARNING
TANK MUST BE FULL
OF WATER BEFORE
HEATING ELEMENTS
ARE ENERGIZED. SEE
INSTALLATION
INSTRUCTIONS
Hot
water outlet
to fixtures
Electrical
junction box
(use only copper
conductors)
Anode
Thermal
expansion tank
(if required)
To
cold water
supply
Shut-off
valve
Figure 3. — Water Heater Junction Box.
5. ELECTRICAL CONNECTIONS — A separate branch circuit with copper
conductors, overcurrent protective device and suitable disconnecting
means must be provided by a qualified electrician. All wiring must
conform to local codes or the latest edition of National Electrical Code
ANSI/NFPA 70, or in Canada, the Canadian Electric Code.
Relief valve
discharge line to
suitable open drain
6" (15.24 cm)
air gap
Total
Water
Heater
Wattage
Figure 2. — Typical Installation
The pressure rating of the relief valve must not exceed 150 psi
(1,034 kPa), the maximum working pressure of the water heater as marked on the rating plate. The BTUH Rating of the relief
valve must not be less than the input rating of the water heater
as indicated on the rating label located on front of the heater
(1 watt = 3.412 BTUH).
3,000
4,000
4,500
Connect the outlet of the relief valve to a suitable open drain so that the
discharge water cannot contact live electrical parts and to eliminate
potential water damage. Piping used should be of a type approved for
hot water distribution. The discharge line must be no smaller than the
outlet of the valve and must pitch downward from the valve to allow
complete drainage (by gravity) of the relief valve and discharge line.
The end of the discharge line should not be threaded or concealed and
should be protected from freezing. No valve of any type, restriction or
reducer coupling should be installed in the discharge line.
5,000
5,500
6,000
8,000
4. TO FILL WATER HEATER — Make certain drain valve is completely
closed. Open shut-off valve in cold water supply line. Open each hot
water faucet slowly to allow air to vent from the water heater and
piping. A steady flow of water from the hot water faucet(s) indicates a
full water heater.
9,000
10,000
! WARNING
Tank MUST BE full of water before power is turned on. Heating
element(s) WlLL BE DAMAGED if energized for even a short time
while tank is dry. The water heater’s warranty does not cover
damage or failure resulting from operation with an empty or partially
empty tank. (Reference is made to the limited warranty for complete
terms and conditions.)
Snap
Bushing
Leads from water heater.
Either 2, 3 or 4 wires
Drain valve
Insert Electrical Leads
through Snap Bushing into
Junction Box
Heat trap
6" (15.24 cm)
minimum
Jacket access
panels
Auxiliary
catch pan
2" (5 cm)
maximum
Three (3) sheet metal screws removed
from "factory installed" junction box.
11,000
12,000
P
h
a
s
e
Recommended Over
Current Protection
(Fuse or Circuit Breaker)
Amperage Rating
208V
240V
1
20
3
20
1
25
3
25
1
Copper Wire Size
AWG Based on N.E.C.
Table 310-16 (75°C)
277V
480V
208V
240V
277V
480V
20
15
15
12
20
---
15
12
12
14
14
12
---
14
25
20
15
10
25
---
15
10
10
12
14
10
---
14
30
25
25
15
10
10
10
14
3
30
25
---
1
30
25
25
15
10
10
---
14
15
10
10
10
14
3
30
25
1
30
30
---
15
10
10
---
14
25
15
8
10
10
14
3
30
1
40
30
---
15
8
10
---
14
35
30
20
8
8
10
12
3
35
30
---
15
8
10
---
14
1
50
45
40
25
8
8
8
10
3
45
40
---
20
8
8
---
12
1
60
50
45
25
6
8
8
10
3
50
45
---
25
8
8
---
10
1
70
60
50
30
6
6
8
10
3
60
50
---
25
6
8
---
10
1
70
60
50
30
4
6
8
10
3
60
50
---
25
6
8
---
10
1
80
70
60
35
4
6
6
8
3
70
50
---
30
6
6
---
10
Table 1. — Branch Circuit Sizing and Wire Size Guide Based on
N.E.C. ANSI / NFPA 70
5
Installation
In order to conform with U.L. requirements, it is absolutely necessary
that the Junction Box Kit be installed per figure 3 above. An opening
for either 1/2” or 3/4” electrical fitting is provided for field wiring
connections. Refer to Figure 3.
! WARNING
Application of any external insulation to this water heater will
require careful attention to the following:
•
Do not cover the temperature and pressure relief valve.
•
Do not cover jacket access panels to thermostats and heating
elements.
•
Do not cover electrical junction box of water heater.
The voltage requirements and wattage load for the water heater is
specified on the rating plate on the front of the heater.
Table 1, on the previous page, recommends minimum branch circuit
sizing based on the National Electric Code. Refer to the wiring diagram
marked on the back cover of this manual for field wiring connections.
•
Do not cover operating or warning labels attached to the water
heater nor attempt to relocate them on exterior of insulation
blanket.
! CAUTION
6. PIPE INSULATION — For increased energy efficiency, certain water
heater models covered by this Use & Care Manual have been
supplied with two (2) 24” (61 cm) sections of pipe insulation. Should
the model being employed in your particular installation include the
pipe insulation, please install the insulation as shown below for the
type of installation configuration that best matches yours.
The presence of water in the piping and water heater does not
provide sufficient conduction for a ground. Non-metallic piping,
dielectric unions, flexible connectors etc. can cause the water heater
to be electrically isolated.
The branch circuit wiring should include either:
A. Metallic conduit or metallic sheathed cable approved for use as a
grounding conductor and installed with fittings approved for the
purpose.
B. Non-metallic sheathed cable or metallic conduit or metallic sheathed
cable not approved for use as a ground conductor shall include a
separate conductor for grounding. It should be attached to the ground
terminals of the water heater and the electrical distribution box.
! CAUTION
Typical Vertical piping arrangement.
The manufacturer’s warranty does not cover any damage or defect
caused by installation, attachment or use of any type of energy
saving or other unapproved devices (other than those authorized
by the manufacturer) into, onto or in conjunction with the water
heater. The use of unauthorized energy saving devices may shorten
the life of the water heater and may endanger life and property. The
manufacturer disclaims any responsibility for such loss or injury
resulting from the use of such unauthorized devices.
If local codes require external application of insulation blanket kits the
manufacturer’s instructions included with the kit must be carefully followed.
Typical Horizontal piping arrangement.
Installation Check List
A. Water Heater Location
❑ Close to area of heated water demand.
❑ Indoors and protected from freezing temperatures.
❑ Area free of flammable vapors.
❑ Provisions made to protect area from water damage.
❑ Sufficient room to service water heater.
B. Water Supply
❑ Water heater completely filled with water.
❑ Water heater and piping air vented.
C. Relief Valve
❑ Temperature and Pressure Relief Valve properly installed
and discharge line run to open drain
❑ Discharge line protected from freezing.
D.Wiring
❑ Power supply voltage agrees with water heater rating plate.
❑ Branch circuit wire and fusing or circuit breaker of proper size.
❑ Electrical connections tight and unit properly grounded.
❑ Water connections tight and free of leaks
6
Operation
SAFETY PRECAUTIONS
A. Do turn off power to water heater if it has been subjected to over
heating, fire, flood or physical damage.
! CAUTION
Hydrogen gas can be produced in a hot water system served by
this water heater that has not been used for a long period of time
(generally two weeks or more). HYDROGEN GAS IS EXTREMELY
FLAMMABLE!! To dissipate such gas and to reduce risk of injury,
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 flow. Do not smoke or use an open
flame near the faucet at the time it is open.
B. Do Not turn on water heater unless it is filled with water.
C. Do Not turn on water heater if cold water supply shut-off valve is
closed.
D. If there is any difficulty in understanding or following the OPERATION
or MAINTENANCE instructions, it is recommended that a qualified
person or serviceman perform the work.
1. WATER TEMPERATURE SETTING — The temperature of the water in
the water heater can be regulated by setting the temperature dial of
the adjustable surface mounted thermostats located behind the jacket
access panels. To comply with safety regulations the thermostats are
factory set at 120°F (49°C) or less where local codes require.
ESE
ESE
R
R
T
T
Reset Button
Time / Temperature Relationships in Scalds
Temperature
Time to Produce Serious Burn
20°F (49°C)
More than 5 minutes
125°F (52°C)11/2 to 2 minutes
130°F (54°C)
About 30 seconds
135°F (57°C)
About 10 seconds
140°F (60°C)
Less than 5 seconds
145°F (63°C)
Less than 3 seconds
150°F (66°C)
About 11/2 seconds
155°F (68°C)
About 1 second
Thermostat Dial
Pointer
Table courtesy of Shriners Burn Institute
! DANGER
110
170
120
160
150
140
130
Make certain power to water heater is OFF before removing jacket
access panel(s) FOR ANY REASON.
TURN OFF
POWER
BEFORE
SERVICING
Thermostat Protective
Cover
CAUTION!! — Hotter water increases the risk of SCALDING!
This illustration shows the temperature adjustment dial used for setting the
water temperature. Refer to Section 1 - Water Temperature Setting, above, for
more details and safety instructions regarding water temperature setting.
If adjustment is necessary, turn off power to water heater, remove jacket
access panel and insulation exposing thermostats. The thermostat
protective covers should not be removed. Set thermostat dial pointers,
with a small screwdriver, to desired temperature. (Refer to Fig. 4.)
Replace insulation and jacket access panel. Turn on power to water
heater.
2. SAFETY CONTROLS — The water heater is equipped with a
combination Thermostat and Temperature Limiting Control (ECO) that is
located above the heating element in contact with the tank surface. Non
simultaneous operating heaters have an ECO above the upper element,
and simultaneous operating heaters have an ECO above both upper
and lower elements. Refer to the wiring diagram marked on the back of
this manual to determine which control operating scheme this heater is
wired for. If for any reason the water temperature becomes excessively
high, the Temperature Limiting Control (ECO) breaks the power circuit to
the heating element. Once the control opens, it must be reset manually.
Figure 4. — Thermostat and Protective Cover.
Safety and energy conservation are factors to be considered when
selecting the water temperature setting of the water heater’s
thermostats. The lower the temperature setting the greater the savings
in energy and operating costs.
! DANGER
Hotter water increases the potential for Hot Water SCALDS.
! CAUTION
NOTICE: When this water heater is supplying general purpose
hot water requirements for use by individuals, a thermostatically
controlled mixing valve for reducing point of use water temperature
is recommended to reduce the risk of scald injury. Contact a licensed
plumber or the local plumbing authority for further information.
The cause of the High Temperature Condition must be investigated
by qualified service personnel and corrective action taken before
placing the water heater in service again.
To reset the Temperature Limiting Control, turn off power to water
heater, remove jacket access panel and insulation. The thermostat
protective cover SHOULD NOT be removed. (Refer to Fig. 4.) Press
red “RESET” button. Replace insulation and jacket access panel before
turning on power to water heater.
7
Operation‑‑
In order to drain water heater, turn off cold water supply, then it
is necessary to open a hot water faucet or lift the handle on the
relief valve to admit air to the tank. Attach a garden hose to the
drain valve on the water heater and direct the stream of water to
a drain where it will do no damage.
3. EMERGENCY INSTRUCTIONS —
! WARNING
If water heater has been subjected to flood,fire,or physical damage, turn off
power and water to water heater. Do not operate the water heater again
until it has been thoroughly checked by qualified service personnel.
! DANGER
The water drained from the tank may be hot enough to present a SCALD
HAZARD and should be directed to a suitable drain to prevent injury or
damage.
4. LONG TIME SHUT-DOWN — If the water heater is to remain
idle for an extended period of time, the power and water to the
water heater should be turned off to conserve energy. The water
heater and piping should be drained if they might be subjected to
freezing temperatures.
NOTICE: Refer to “Hydrogen Gas Caution” in Safety Precautions
Section on page 7.
6. ANODE — This water heater is equipped with an anode rod
designed to prolong the life of the glass lined tank. The anode is
slowly consumed cathodically, thereby eliminating or minimizing
corrosion of the glass lined tank.
After a very long shut-down period, the water heater’s operation
and controls should be checked by qualified service personnel.
Make certain the water heater is completely filled before again
placing it in operation .
Water sometimes contains a high sulfate and/or mineral content
and together with the cathodic protection process can produce
a hydrogen sulfide or rotten egg odor in the heated water.
Chlorination of the water supply should minimize the problem.
5. DRAINING HEATER —
NOTICE: Do not remove the anode rod from the
water heater’s tank, except for inspection and/
or replacement, as operation with the anode rod
removed will shorten the life of the glass lined tank
and will exclude warranty coverage.
! CAUTION
Shut off power to water heater before draining water.
Maintenance
NOTICE: If the temperature and pressure relief valve on
the water heater discharges periodically, this may be due
to thermal expansion in a “Closed” water system. Contact
the water supplier or your plumbing contractor on how to
correct this. DO NOT plug the relief valve outlet.
Properly maintained, your water heater will provide years of dependable
trouble-free service. It is suggested that a routine preventive maintenance
program be established and followed by the user. It is further recommended
that a periodic inspection of the operating controls, heating element and
wiring should be made by service personnel qualified in electric appliance
repair.
1. ROUTINE PREVENTATIVE MAINTENANCE
A. Most electrical appliances make some sound when in operation, even
when new. If the hissing or singing sound level increases excessively, the
electric heating element may require cleaning. Contact your installer or
plumbing contractor to inspect.
D. A water heater’s tank can act as a settling basin for solids suspended
in the water. It is, therefore, not uncommon for hard water deposits to
accumulate in the bottom of the tank. It is suggested that a few quarts
of water be drained from the water heater’s tank through the drain valve
every month to clean the tank of these deposits.
B. The area near the water heater must be kept free of flammable liquids
such as gasoline or paint thinners, adhesives or other combustible
materials.
E. Rapid closing of faucets or solenoid valves in automatic water using
appliances can cause a pounding “water hammer” sound. “Water
hammer” can be described as a banging noise heard in a water pipe
following an abrupt alteration of the flow with resulting pressure surges.
Strategically located risers in the water pipe system can be used to
minimize the problem. Also water hammer arresting devices are usually
available from your plumber or local plumbing supply store.
C. At least once a year, lift and release the lever handle on the temperature
pressure relief valve, located near the top of the water heater, to make
certain the valve operates freely and allow several gallons to flush through
discharge line. Make certain the discharged water is directed to an open
drain.
2. ANODE ROD INSPECTION — The anode rod should be removed from
the water heater’s tank annually for inspection and replaced when more
than 6” of core wire is exposed at either end of the rod. Refer to Fig. 2 for
anode rod location. Make certain cold water supply is turned off before
removing anode rod.
! DANGER
Before manually operating the relief valve, make certain no one will
be exposed to the danger of coming in contact with the hot water
released by this valve. The water may be hot enough to create a
SCALD hazard. The water released should be directed to a suitable
drain to prevent injury or damage.
8
Trouble Shooting Guide
NATURE OF TROUBLE
POSSIBLE CAUSE
SERVICE
No Hot Water
1. Manual switch turned off Turn to ON
2. Improper Wiring
** Rewire per Wiring Diagram
3. No Power — blown fuse or circuit breaker tripped
a. Shorted wiring
** Replace or repair
b. Circuit overloaded
** Provide adequate circuit or reduce load
c. Improper wiring
** Rewire per diagram
d. Grounded element or thermostat
** Replace
4. Manual Reset Limit (ECO) open Refer to "Operation Section"
a. Thermostat(s) defective
** Replace
b. Thermostat out of calibration
** Lower setting or replace
c. Heat build-up due to loose wires
** Tighten wire connections
d. Defective Limit (ECO)
** Replace
Not enough Hot Water
1. Heater undersized Reduce rate of hot water use
2. Defective Element(s)
** Check amperage, replace element if low
3. Miswired or defective thermostat
** Check wiring or replace
causing only one element to work
Water too hot or not hot enough
1. Thermostat setting too high or low Change setting as required
2. Thermostat out of calibration
** Replace
Noisy heating element(s)
1. Scale build-up on elements
** Remove and clean
Rattling noise during
1. Heat Trap fitting in operation None. The rattling noise is normal for
periods of water usage Heat Traps when in operation and
does not indicate a need for service.
! CAUTION
** For your safety, DO NOT attempt repair of Electrical Wiring, Thermostat(s), Heating Elements or other Operating Controls. Refer repairs to
qualified service personnel.
How to Obtain Service Assistance
1. Should you have any questions about your new water heater, or if it
requires adjustment, repair, or routine maintenance, it is suggested
that you first contact your installer, plumbing contractor or previously
agreed upon service agency. In the event that the firm has moved, or
is unavailable, refer to the telephone directory commercial listings
or local utility for qualified service assistance.
When contacting the manufacturer, the following information should
be made available:
a. Model and serial numbers of the water heater as shown on the rating
plate attached to the jacket of the heater.
2. Should your problem not be solved to your complete satisfaction, you
should then contact the Manufacturer’s National Service Department
at the following address:
In the United States:
2600 Gunter Park Drive
Montgomery, Alabama 36109-1413
Phone: 1-800-432-8373.
In Canada:
Rheem Canada, Ltd./Ltée
128 Barton Street West
Hamilton, Ontario L8N 3P3
Phone: 1-800-432-8373
Model No.
b. Address where water heater is located and can be seen.
c. Name and address of installer and any service agency who performed service on the water heater.
d. Date of original installation and dates any service work was performed.
e. Details of the problem as you can best describe them.
f. List of people, with dates, who have been contacted regarding your
problem.
Serial No.
Date of Installation
9
Installed By:
Replacement Parts List
Light Duty Commercial
Models
Tall or Short Versions
Instructions for placing a Parts Orders:
Address parts orders to the distributor or store from where the heater was purchased.
All parts orders should include:
1. Model number and Serial number of heater (from rating plate).
2. Specify voltage and wattage as marked on rating plate.
3. Part Description (as noted at right) and number of parts desired.
Temperature & Pressure
relief valve
Dip tube/internal heat trap
Internal heat trap
Dip tube gasket
Some models may have
been supplied with
External heat traps
in lieu of Internal heat traps
Anode
Upper thermostat protective cover
(on double element models only)
R
Cavity insulation
E
SE T
RE
Heating element
gasket
(on double element
models only)
Upper thermostat
(on double element
models only)
SE T
Internal heat trap
gasket
90
140
100
130
120 110 O - D I
MER
SC
TH
N OFF
TUR ER
POW RE
BEFO G
VICIN
SER
Heating element
(on double element
models only)
Upper thermostat bracket
(on double element
Lower thermostat
models only)
Lower thermostat Jacket access
panel(s)
protective cover
Heating element
gasket
90
140
100
130
TH
120
ER
110
OM-
DIS
C
N OFF
TUR ER
POW
OREG
BEF
VICIN
SER
Heating element
Thermostat
bracket
Cavity
insulation
Drain valve
10
Cavity Insert Instructions
The following instructions are intended for qualified
service personnel ONLY, and should only be done when
necessary.
In order to replace the thermostat or heating element,
remove the cavity insert crossbar by following the
instructions below:
1.
Turn off the power to the water heater.
2.
Remove the jacket access panel(s) and
insulation.
3.
Rotate the crossbar up and down until it breaks
away from the remainder of the cavity insert.
(See illustration to the left)
Discard the crossbar. It cannot and need not be
replaced.
4.
Replace the thermostat and/or element as
necessary.
5.
Replace the insulation and jacket access
panel(s) before turning on the power to the water
heater.
NOTICE: The cavity insert crossbar is necessary for the
manufacturing process only. The removal of the crossbar will
not interfere with the operation of the water heater.
11
Wiring Diagrams — Therm-O-Disc Thermostats (Type 59T)
1
2
4
1
BLACK
BLACK
RED
2
1
3
2
4
2
4
1
4
1
4
1
4
2
JUNCTION
BOX
UPPER THERMOSTAT
& HIGH TEMP. LIMIT
(ECO)
BLUE
YELLOW
BLUE
TM 1
YELLOW
JUNCTION
BOX
RED
BLACK
2
1
3
1
3
2
4
2
4
BLACK
RED
1
2
1
1
1
2
2
2
2
LOWER
HEATING
ELEMENT
1
LOWER
THERMOSTAT
F IG. C
FIG. D
2
LOWER
HEATING
ELEMENT
LOWER
HEATING
ELEMENT
LOWER
HEATING
ELEMENT
SINGLE ELEMENT
FIG. B
UPPER
HEATING
ELEMENT
LOWER
THERMOSTAT
& HIGH TEMP
LIMIT (ECO)
LOWER
THERMOSTAT
1
LOWER
HEATING
ELEMENT
UPPER THERMOSTAT
& HIGH TEMP. LIMIT
(ECO)
RED
UPPER
HEATING
ELEMENT
BLACK
UPPER
HEATING
ELEMENT
BLUE
RED (10 GA)
BLACK (10 GA)
LOWER
THERMOSTAT
& HIGH TEMP
LIMIT (ECO)
HEATING
ELEMENT
FIG. A-2
3
4
BLACK
2
THERMOSTAT
& HIGH TEMP.
LIMIT (ECO)
1
2
BLACK
3
L2
3
2
BLACK
JUNCTION
BOX
RED
BLACK
1
*
G
L1
1
BLACK
LOWER
THERMOSTAT
& HIGH TEMP
LIMIT (ECO)
G
UPPER
HEATING
ELEMENT
RED
* L2
UPPER
HEATING
ELEMENT
BLACK
L1
RED (10 GA)
BRANCH CIRCUIT
TO ELECTRICAL
DISTRIBUTION PANEL
L2
YELLOW
YELLOW
RED
120 V ONLY
BLACK (10 GA)
SINGLE ELEMENT
JUNCTION
BOX
JUNCTION BOX
HEATING
ELEMENT
UPPER THERMOSTAT
& HIGH TEMP.
LIMIT (ECO)
*
G
BLUE
4
L1
BLACK TM 2
2
TM2
L2
YELLOW
BLUE
BLACK
2
3
*
G
BRANCH CIRCUIT
TO ELECTRICAL
DISTRIBUTION PANEL
BLUE
1
2
1
L1
RED
4
TM1
L2
CONNECTOR TO "OFF PEAK"
METER (TIMER)
BRANCH CIRCUIT
TO ELECTRICAL
DISTRIBUTION PANEL
YELLOW
2
*
G
BLUE
3
L1
YELLOW
WHITE
1
1
TM2
UPPER THERMOSTAT
& HIGH TEMP. LIMIT (ECO)
THERMOSTAT
& HIGH TEMP.
LIMIT (ECO)
2
L2
YELLOW
(10 GA)
1
*
G
BLACK
(10 GA)
BLACK
JUNCTION
BOX
L1
JUNCTION BOX
N
RED
(10 GA)
*
G
H
BRANCH CIRCUIT
TO ELECTRICAL
DISTRIBUTION PANEL
BRANCH CIRCUIT
TO ELECTRICAL
DISTRIBUTION PANEL
DOUBLE ELEMENT
NON-SIMULTANEOUS
WITH 3 WIRE OUTLET
DOUBLE ELEMENT
NON-SIMULTANEOUS
WITH 4 WIRE OUTLET ‡
DOUBLE ELEMENT
NON-SIMULTANEOUS
TO SECOND POWER SOURCE,
"OFF PEAK" METER, OR TIMER
BRANCH CIRCUIT
TO ELECTRICAL
DISTRIBUTION PANEL
BLUE
(10 GA)
BRANCH CIRCUIT
TO ELECTRICAL
DISTRIBUTION PANEL
UPPER THERMOSTAT
& HIGH TEMP. LIMIT (ECO)
FIG. A-1
DOUBLE ELEMENT
SIMULTANEOUS OPERATION
WITH 4 WIRE OUTLET
BLUE
DOUBLE ELEMENT
SIMULTANEOUS OPERATION
FIG. E
F IG. F
‡ This water heater is factory equipped for two (2) wire connection to
electrical power. For use with "off-peak" meter (timer) remove wire
nut from red and black leads and connect to "off-peak" meter (timer).
* Grounding conductor may be required.
Refer to Wiring Section of Manual
THIS ELECTRIC WATER HEATER IS WIRED AS INDICATED ABOVE OR BELOW
DOUBLE ELEMENT
SIMULTANEOUS OPERATION
Wiring Diagrams
Electric Water Heaters for
3 - Phase Applications
3- PHASE BRANCH CIRCUIT
TO ELECTRICAL
DISTRIBUTION PANEL
3- PHASE BRANCH CIRCUIT
TO ELECTRICAL
DISTRIBUTION PANEL
L3
L1
L2
*
L2
L1
L3
G
1
3
2
4
1
2
FIG. G
1
2
BLACK
RED
BLACK
LOWER
HEATING
ELEMENT
*
UPPER THERMOSTAT
& HIGH TEMP. LIMIT (ECO)
BLUE
LOWER
THERMOSTAT
& HIGH TEMP
LIMIT (ECO)
1
2
4
YELLOW
UPPER
HEATING
ELEMENT
LOWER
THERMOSTAT
& HIGH TEMP
LIMIT (ECO)
1
LOWER
HEATING
ELEMENT
FIG. H
UPPER
HEATING
ELEMENT
RED
YELLOW
3
4
2
RED (10 GA)
BLUE
2
1
2
BLUE
BLACK (10 GA)
1
BLACK
3
4
UPPER THERMOSTAT
& HIGH TEMP. LIMIT (ECO)
1
2
YELLOW
BLUE (10 GA)
YELLOW (10 GA)
G
Therm-O-Disc Thermostats
(Type 59T)
For the connection of this
water heat er to a 3-Phase Branch
Circuit, con nect field wiring to
the water heater as indicated in
the ap pro pri ate wiring diagram
at right. A sep a rate junction box
is being supplied with this water
heater (check bot tom of carton)
to accomodate wir ing and conduit con nec tions. Install the
Junction Box as shown on the
Installation/Instruction Sheet
in clud ed in the plastic bag
at tached to the heater.
DOUBLE ELEMENT
NON-SIMULTANEOUS