State SSE-120 User Manual
Instruction Manual
COMMERCIAL ELECTRIC WATER HEATERS
MODELS SSE-5 THRU SSE-120
INSTALLATION - OPERATION - SERVICE -
MAINTENANCE - LIMITED WARRANTY
www.statewaterheaters.com
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 0912 198336-003
SAFE INSTALLATION, USE AND SERVICE
Your safety and the safety of others is extremely important in the installation, use, and servicing of this water heater.
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 symbol
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.
The California Safe Drinking Water and Toxic Enforcement Act requires the Governor of California to publish a list of
substances known to the State of California to cause cancer, birth defects, or other reproductive harm, and requires
businesses to warn of potential exposure to such substances.
This product contains a chemical known to the State of California to cause cancer, birth defects, or other reproductive
harm. This water heater can cause low level exposure to some of the substances, included in the act.
• QualiedInstallerorServiceAgency:
Installation and service of this water heater requires ability equivalent to that of a Qualied Agency (as dened by ANSI below) in
the eld involved. Installation skills such as plumbing and electrical supply are required in addition to electrical testing skills when
performing service.
indicates a potentially hazardous situation
which, if not avoided, could result in property
damage.
IMPORTANT DEFINITIONS
• ANSIZ223.12006Sec.3.3.83:
“Qualied 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.”
2
GENERAL SAFETY INFORMATION
PRECAUTIONS
DO NOT USE THIS WATER HEATER IF ANY PART HAS BEEN
UNDER WATER. Immediately call a qualied 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 qualied service agency.
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. To reduce the 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. THERE SHOULD BE NO SMOKING OR
OPEN FLAME NEAR THE FAUCET AT THE TIME IT IS OPEN.
3
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
FEATURES AND COMPONENTS ..........................................................................6
APPROVALS ...........................................................................................................7
MODEL AND RATING .............................................................................................7
LOCATING THE NEW WATER HEATER ................................................................7
Facts to Consider About the Location ............................................................7
INSTALLATION .......................................................................................................8
Required Ability ..............................................................................................8
General ..........................................................................................................8
Contaminated Water ......................................................................................8
Circulating Pump ............................................................................................8
Temperature-Pressure Relief Valve................................................................8
Water Line Connections .................................................................................9
Closed Water Systems ...................................................................................9
Thermal Expansion ........................................................................................9
ELECTRICAL DATA ...............................................................................................10
General ........................................................................................................10
Branch Circuit ...............................................................................................10
Heater Circuits .............................................................................................10
Control Circuits .............................................................................................10
Power Circuit ................................................................................................10
WIRING DIAGRAMS .............................................................................................12
OPERATION ..........................................................................................................15
General ........................................................................................................15
Filling the Water Heater ................................................................................15
Initial Start Up ...............................................................................................15
Draining the Water Heater ...........................................................................15
TEMPERATURE REGULATION ...........................................................................16
High Temperature Limit Controls (ECO) .......................................................16
Thermostat Controls .....................................................................................16
Temperature Adjustment ..............................................................................16
CONTROL SYSTEM OPERATION .......................................................................17
Heating Element Operation ..........................................................................17
Control System Features .............................................................................17
Control System Navigation ...........................................................................17
The Desktop Screen ....................................................................................17
Temperatures Menu .....................................................................................20
Heater Status Menu .....................................................................................22
Economy Mode Setup Menu ........................................................................22
Economy Mode Settings ..............................................................................24
Alarm Output Setup Menu ............................................................................27
Display Settings Menu .................................................................................27
Heater Information Menu .............................................................................27
Current Fault / Alert Menu ............................................................................28
Fault History Menu .......................................................................................28
Fault Occurrence Menu ................................................................................28
Restore Factory Defaults Menu ...................................................................29
MAINTENANCE ....................................................................................................30
General ........................................................................................................30
Anode Inspection and Replacement ............................................................30
Temperature-Pressure Relief Valve Operation .............................................30
Flushing ........................................................................................................30
Sediment Removal .......................................................................................30
Lime Scale Removal ....................................................................................30
TROUBLESHOOTING CHECKLIST .....................................................................32
Not Enough or No Hot Water .......................................................................32
Water Is Too Hot ...........................................................................................32
Water Heater Makes Strange Sounds ..........................................................32
Leakage Checkpoints ...................................................................................32
PIPING DIAGRAMS ..............................................................................................33
NOTES ..................................................................................................................45
WARRANTY ..........................................................................................................47
INTRODUCTION
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
• ASME - American Society of Mechanical Engineers
• 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” 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.
Detailed installation diagrams are in this manual. These
diagrams will serve to provide the installer with a reference
for the materials and method of piping suggested. IT
IS NECESSARY THAT ALL WATER PIPING AND THE
ELECTRICAL WIRING BE INSTALLED AND CONNECTED
AS SHOWN IN THE DIAGRAMS.
Particular attention should be given to the installation of
thermometers at the locations indicated in the diagrams as
these are necessary for checking the operation of the heater.
fuses always use the correct size for the circuit. See page 12
through 14.
The principal components of the heater are identied on page 6.
The model and rating plate on page 7 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 code requirements,
follow NFPA-70 (current edition). The National Electrical Code
may be ordered from: National Fire Protection Association, 1
Batterymarch Park, Quincy, MA 02269.
3. If after reading this manual you have any questions or do not
understand any portion of the instructions, call the toll free
number on the back cover for further assistance.
A sample rating plate and barcode tag are shown on page 3 of this
manual. In order to expedite your request, please have the serial
number and item ID from the barcode tag 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 qualied agency
(page 2) in the eld involved. Plumbing and electrical work are
required.
5. For installation in California this water heater must be braced or
anchored to avoid falling or moving during an earthquake. See
instructions for correct installation procedures. Instructions may
be obtained from California Ofce of the State Architect, 1102 Q
Street, Suite 5100, Sacramento, CA 95811.
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
6. Massachusetts Code requires this water heater to be installed in
accordance with Massachusetts 248-CMR 2.00: State Plumbing
Code and 248-CMR 5.00.
4
DIMENSIONS AND CAPACITIES DATA
FIGURE 1.
TABLE 1.
SSE
Tank Capacity
Gallons Liters A B C D Lbs. Kg.
5 19 3 20 1/2 521 mm 16 1/4 412.75 mm 22 1/2 571.5 mm 5 1/4 133.35 mm 82 37.2
10 38 6 26 1/4 667 mm 18 3/4 476.25 mm 25 635 mm 5 1/4 133.35 mm 106 48.1
20 76 18 27 1/4 692 mm 20 1/2 520.7 mm 26 1/2 673.1 mm 5 3/4 146.05 mm 130 59
30 11 4 24 35 3/4 908 mm 20 1/2 520.7 mm 26 1/2 673.1 mm 5 3/4 146.05 mm 150 68
40 151 36 45 3/4 1,162 mm 20 1/2 520.7 mm 26 1/2 673.1 mm 5 3/4 146.05 mm 190 86.2
50 189 90 54 3/4 1,391 mm 20 1/2 520.7 mm 26 1/2 673.1 mm 5 3/4 146.05 mm 221 100.2
65 246 90 50 1/2 1,283 mm 26 1/2 673.1 mm 33 1/2 850.9 mm 7 177.8 mm 267 121.1
80 303 90 49 1/4 1,251 mm 28 711.2 mm 35 889 mm 7 177.8 mm 285 129.3
100 379 90 58 1/4 1,480 mm 28 711.2 mm 35 889 mm 7 177.8 mm 354 160.6
120 450 90 63 1/4 1,607 mm 30 762 mm 37 939.8 mm 7 1/2 190.5 mm 420 190.5
Maximum
KW Input
All Dimensions in Inches (mm) Approximate Shipping Wt.
TABLE 2.
RECOVERY RATE IN GALLONS PER HOUR *
Temperature Rise °F
STANDARD
KW INPUT
3 10,239 41 31 24 20 17 15 13 12 11 10 10 9
6 20,478 82 62 49 41 35 31 27 25 22 21 19 18
9 30,717 123 92 74 62 53 46 41 37 34 31 28 26
12 40,956 164 123 98 82 70 61 55 49 45 41 38 35
15 51,195 205 154 123 102 88 77 68 61 56 51 47 44
18 61,434 246 184 148 123 105 92 82 74 67 62 57 53
24 81,912 328 246 197 164 140 123 109 98 90 82 76 70
30 102,390 410 308 246 205 176 154 137 123 112 103 95 88
36 122,868 492 369 295 246 2 11 184 164 148 134 123 11 3 105
45 153,585 615 461 369 307 263 230 205 184 168 154 142 132
54 184,302 738 554 443 359 316 277 246 221 201 185 170 158
60 204,780 819 615 492 410 351 307 273 246 223 205 189 176
75 255,975 1025 768 615 512 439 384 341 307 279 256 236 219
90 307,170 1229 922 738 615 527 461 410 369 335 307 284 263
BTU/
HOUR
30° 40° 50° 60° 70° 80° 90° 100° 110° 120° 130° 140°
5
FEATURES AND COMPONENTS
Below is an illustration of the water heater with its features called out. The text of this manual will refer to the items shown.
UIM - USER INTERFACE MODULE
(on front of hinged access door)
FIGURE 2.
6
APPROVALS
All models meet National
Sanitation Foundation
NSF-5 requirements.
All models are listed
by Underwriters
Laboratories Inc.
MODEL AND RATING
LOCATING THE NEW WATER HEATER
FACTS TO CONSIDER ABOUT THE LOCATION
Carefully choose a location for the new water heater. The placement
is a very important consideration for the safety of the occupants in
the building and for the most economical use of the water heater.
Whether replacing an old water heater or putting the water heater in
a new location, the following critical points must be observed. The
water heater must be located:
1. On a level surface. Shim the channel type skid base as
necessary if levelling is required.
2. Near a oor drain. The 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.
3. The discharge opening of the temperature and pressure relief
valve should always be piped to an open drain or external to
the building.
4. Close to the point of major hot water usage and the power
supply.
Hot water piping and branch circuit wiring should be as short as possible.
Insulate hot and cold water piping where heat loss and condensation
may be a problem.
Heater construction permits installation, maintenance, and service
work to be performed through the front control panel.
Suggested clearances from adjacent surfaces are 12 inches on top,
30 inches in front for access to the unit.
The heater may be installed on or against combustible surfaces. The
left side and back may be placed ush against adjacent surfaces.
The temperature of the space in which the water heater is installed
must not go below 32°F or above 122°F.
7
INSTALLATION
REQUIRED ABILITY
Installation and service of this water heater requires ability
equivalent to that of a qualied agency (page 2) in the eld involved.
Plumbing and electrical work is required.
GENERAL
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 current 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.
Note:To comply with NSF Standard 5 installation requirements the
bottom of the water heater must be sealed to the oor with a silicone
based sealant or elevated 6 inches above the oor.
CONTAMINATED WATER
This water heater shall not be connected to any heating system(s)
or component(s) used with a non-potable water heating appliance.
Toxic chemicals, such as those used for boiler treatment shall not
be introduced into this system.
Products of this sort should not be stored near the heater. Also, air
which is brought in contact with the water heater should not contain
any of these chemicals. If necessary, uncontaminated air should be
obtained from remote or outside sources.
Do NOT test electrical system before heater is filled with water,
follow the START UP procedure in the OPERATION section of
this manual.
The principal components of the heater are identied in the Features
and Components illustration in Figure 2.
MIXINGVALVEUSAGE:
Water heaters are intended to produce hot water. Water heated to
a temperature which will satisfy space heating, clothes washing,
dish washing, cleaning and other sanitizing needs can scald and
permanently injure you upon contact. Some people are more likely
to be permanently injured by hot water than others. These include
the elderly, children, the inrm, or physically/developmentally
disabled. If anyone using hot water in your home ts into one of these
groups or if there is a local code or state law requiring a maximum
water temperature at the hot water tap, then you must take special
precautions. In addition to using the lowest possible temperature
setting that satises your hot water needs, a means such as a
MIXING VALVE should be used at the hot water taps used by these
people or at the water heater.
MIXING VALVES for reducing point of use temperature are
available. Consult a qualied installer or service agency. Follow all
manufacturer’s Instructions for installation of these valves. Before
changing the factory setting on the thermostat, read the “Temperature
Regulation” section in this manual.
CIRCULATING PUMP
Field installed circulating pumps should be of all bronze
construction.
TEMPERATURE-PRESSURE RELIEF VALVE
This water heater is provided with a properly rated/sized and
certied combination temperature - pressure relief valve by the
11 manufacturer. The valve is certied by a nationally recognized
testing laboratory that maintains periodic inspection of production of
listed equipment of materials as meeting the requirements for Relief
Valves for Hot Water Supply Systems, ANSI Z21.22 • CSA 4.4, and
the code requirements of ASME.
If replaced, the new valve must meet the requirements of local
codes, but not less than a combination temperature and pressure
relief valve rated/sized and certied as indicated in the above
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.
8
For safe operation of the water heater, the temperature and pressure
relief valve must not be removed from its designated opening nor
plugged. The temperature-pressure relief valve must be installed
directly into the tting of the water heater designed for the relief valve.
Install discharge piping so that any discharge will exit only within 6
inches (15.2 cm) above, or at any distance below the structural oor.
Be certain that no contact is made with any live electrical part. The
discharge opening must not be blocked or reduced in size under
any circumstances. Excessive length, over 30 feet (9.14 m), or
use of more than four elbows can cause restriction and reduce the
discharge capacity of the valve.
No valve or other obstruction is to be placed between the relief valve
and the tank. Do not connect discharge piping directly to the drain
unless a 6” (15.2 cm) air gap is provided. To prevent bodily injury,
hazard to life, or property damage, the relief valve must be allowed
to discharge water in adequate quantities should circumstances
demand. If the discharge pipe is not connected to a drain or other
suitable means, the water ow may cause property damage.
The Discharge Pipe:
• Shall not be smaller in size than the outlet pipe size of the valve,
or have any reducing couplings or other restrictions.
• Shall not be plugged or blocked.
• Shall be of material listed for hot water distribution.
• Shall be installed so as to allow complete drainage of both the
temperature-pressure relief valve and the discharge pipe.
• Shall terminate a maximum of six inches above a oor drain or
external to the building. In cold climates, it is recommended that
the discharge pipe be terminated at an adequate drain inside
the building.
• Shall not have any valve or other obstruction between the relief
valve and the drain.
The temperature-pressure relief valve must be manually operated
at least once a year. Caution should be taken to ensure that (1) no
one is in front of or around the outlet of the temperature-pressure
relief valve discharge line, and (2) the water manually discharged
will not cause any bodily injury or property damage because the
water may be extremely hot. If after manually operating the valve, it
fails to completely reset and continues to release water, immediately
close the cold water inlet to the water heater, follow the draining
instructions in this manual, and replace the temperature-pressure
relief valve with a properly rated/sized new one.
If you do not understand these instructions or have any questions
regarding the temperature-pressure relief valve call the toll free number
listed on the back cover of this manual for technical assistance.
Once the water heater is installed and filled with water, check
the operation of the temperature-pressure relief valve. Follow the
instructions in the Maintenance section of this manual.
WATER LINE CONNECTIONS
This manual provides detailed piping installation diagrams (see
back section of this manual) for typical methods of application.
For the heater inlet and outlet connections, di-electric unions are
recommended. The water heater may be installed by itself, or
with a separate storage tank, on both single and two-temperature
systems. When used with a separate storage tank, the circulation
may be either by gravity or by means of a circulating pump. When
a circulating pump is used it is important to note that the ow rate
should be slow so that there will be a minimum of turbulence inside
the heater.
CLOSED WATER SYSTEMS
Water supply systems may, because of code requirements or such
conditions as high line pressure, among others, have installed devices
such as pressure reducing valves, check valves, and back ow
preventers. Devices such as these cause the water system to be a
closed system.
THERMAL EXPANSION
As water is heated, it expands (thermal expansion). In a closed
system the volume of water will grow when it is heated. As the
volume of water grows there will be a corresponding increase in
water pressure due to thermal expansion. Thermal expansion can
cause premature tank failure (leakage). This type of failure is not
covered under the limited warranty. Thermal expansion can also
cause intermittent temperature pressure relief valve operation:
water discharged from the valve due to excessive pressure build
up. This condition is not covered under the limited warranty. The
temperature-pressure relief valve is not intended for the constant
relief of thermal expansion.
A properly sized thermal expansion tank should be installed on all
closed systems to control the harmful effects of thermal expansion.
Contact a local plumbing service agency to have a thermal
expansion tank installed.
9
ELECTRICAL DATA
GENERAL
Check the water heater model and rating plate information against
the characteristics of the branch circuit electrical supply. Do not
connect the heater to an improper source of electricity.
Voltage applied to the heater should not vary more than +5% to -10%
of the model and rating plate marking for satisfactory operation.
Do NOT energize the branch circuit for any reason before the water
heater tank is lled with water. Doing so may cause the heating
elements to fail.
The installation must conform to these instructions and the local
code authority having jurisdiction. Grounding and electrical wiring
connected to the water heater must also conform to the National
Electrical Code, NFPA 70. This publication is available from The
National Fire Protection Association, 1 Batterymarch Park, Quincy,
MA 02269.
BRANCH CIRCUIT
The branch circuit wire size should be established through reference
to the NEC (National Electrical Code) or other locally approved
sources in conjunction with the water heater amperage rating.. Wire
rated at 75°C should be used. For convenience, portions of the wire
size tables from the Code are reproduced in Table 3. It is suggested
the electrician size the branch circuit at 125 percent of the heater
rating and further increase wire size as necessary to compensate
for voltage drop in long runs. Voltage drop should not exceed 3% at
the water heater.
HEATER CIRCUITS
The water heater’s electrical components are pictured and identied
in the Features and Components illustrations in Figure 2. The model
and rating plate provides heater circuit ratings. There are two main
electrical circuits:
Control Circuit: Power supply for the electromagnetic
contactor coils. 120V power is supplied to the contactor coils
by the CCB (Central Control Board) see wiring diagrams in
this manual.
Power Circuit: High voltage, single or three phase, circuit that
carries the heating element load.
The following section and pages describe the water heater circuits
and includes wiring diagrams.
CONTROL CIRCUITS
The water heater is equipped with an electronic control system.
The system includes a CCB (Central Control Board), an immersion
temperature probe with ECO for temperature sensing and limiting, a
UIM (User Interface Module) for user interface & information display
and element current sensors for monitoring the power circuits. Refer
to the control circuit label on the water heater for details. The CCB
is powered by a small 120V/24V transformer. The control circuit
operates on 120V supplied by a larger 100VA transformer.
Sequence of Operation
1. When the control is powered, the UIM should display model
information, water temperature, operating setpoint, heating
status and operating mode.
2. If the control determines that the actual water temperature inside
the tank is below the programmed operating setpoint minus the
(1st) differential setpoint, a call for heat is activated.
3. After all safety checks are veried the CCB will energize the
contactor coil(s). On models with more than one heating
element the upper most heating elements are energized rst.
Successive heating elements are energized according to
programmed differential setpoints for each heating element.
4. The control remains in the heating mode until the water
temperature reaches the programmed operating setpoint. At
this point the contactors will be de-energized.
5. The control system now enters the standby operating mode
while continuing to monitor the water temperature and the state
of other system devices. If the water temperature drops below
the programmed Operating Setpoint minus the (1st) differential
setpoint, the control will automatically return to step 2 and repeat
the heating cycle.
POWER CIRCUIT
Power circuit wiring is type THHN (or equivalent) rated 600 volts,
105°C, sized as necessary.
The following wiring diagrams are included in this manual to show
typical arrangements of electrical components in the control and
power circuits by voltage and phase characteristics. They are to be
used as a reference by the installer or servicer in performing their
work. An actual diagram of the water heater wiring is furnished with
the heater.
10
TABLE 3.
Allowable Ampacities of Insulated Conductors
Not More Than Three Conductors in Raceway or Cable or Earth (Directly Buried), Based on Ambient Temperature of 30°C (86°F)
Size Temperature Rating of Conductor Size
AWG
MCM
18
16
14
12
10
8
6
4
3
2
1
0
00
000
0000
250
300
350
400
500
Ambient
Temperature
°C
31-40
41-50
51-60
61-70
71-80
= The load current rating and the overcurrent protection for these conductors shall not exceed 15 amperes for 14 AWG, 20 amperes for 12 AWG, and 30 amperes for 10
AWG copper; or 15 amperes for 12 AWG and 25 amperes for 10 AWG aluminum and copper-clad aluminum.
60°C
(140°F)
TYPES
RUW, T
TW, UF
COPPER ALUMINUM OR COPPER-CLAD ALUMINUM
......
......
15
20
30
40
55
70
80
For ambient temperatures over 30°C, multiply the ampacities shown by the appropriate correction factor to determine the maximum
allowable load current.
.82
.58
......
......
......
75°C
(167°F)
TYPES
FEPW
RH, RHW
RUH,
THW,
THWN,
XHHW
USE, ZW
......
......
15
20
30
45
65
85
100
115
130
150
175
200
230
255
285
310
335
380
.88
.75
.58
.35
......
85°C
(185°F)
TYPES
V, MI
......
22
25
30
40
50
70
90
105
120
140
155
185
210
235
270
300
325
360
405
.90
.80
.67
.52
.30
90°C
(194°F)
TYPES
TA, TBS
SA, AVB
SIS, =FEP,
=FEPB,
=RHH,
=THHN,
=XHHW*
21
22
25
30
40
50
70
90
105
120
140
155
185
210
235
270
300
325
360
405
CORRECTION FACTORS
.91
.82
.71
.58
.41
60°C
(140°F)
TYPES
RUW, T
TW, UF
......
......
......
15
25
30
40
55
65
75
.82
.58
......
......
......
75°C
(167°F)
TYPES
RH, RHW
RUH
THW,
THWN
XHHW,
USE
......
......
......
15
25
40
50
65
75
90
100
120
135
155
180
205
230
250
270
310
.88
.75
.58
.35
......
85°C
(185°F)
TYPES
V, MI
......
......
......
25
30
40
55
70
80
95
110
125
145
165
185
215
240
260
290
330
.90
.80
.67
.52
.30
90°C
(194°F)
TYPES
TA, TBS,
SA, AVB
SIS,
=RHH,
=THHN,
=XHHW*
......
......
......
25
30
40
55
70
80
95
110
125
145
165
185
215
240
260
290
330
.91
.82
.71
.58
.41
AWG
MCM
......
......
......
12
10
8
6
4
3
2
1
0
00
000
0000
250
300
350
400
500
Ambient
Temperature
°F
86 –104
105–122
123–141
142–158
159–176
3
6
9
12
15
24
30
45
54
Immersion
Heaters***
No. Of
Wattage
1 3,000
1 6,000
1 9,000
1 12,000
1 15,000
1 18,000
2 12,000
2 15,000
2 18,000
3 15,000
3 18,000
Standard
KW
Ratings
18*
36*
60** 4 15,000 4 4
75** 5 18,000
90** 5 18,000
* 208V models use one additional immersion heater.
** Available on 50 gallon models or larger.
*** Each immersion heater contains three electric elements.
Number of 50A Contractors
208V 240V 480V 208V 240V 277V 480V 208V 240V 480V
1
1
2
2
3 3
5 5 3
STANDARD KW INPUTS
14.4
28.8
1
2
43.3
57.7
72.1
86.5
115.4
144.2
173.1
216.3
N/A
N/A
N/A
N/A
TABLE 4.
Single Phase Three Phase
12.5
25.0
37.5
50.0
62.5
75.0
100.0
125.0
150.0
187.5
225.0
250.0
N/A
N/A
Full Load Current In Amperes
10.8
21.2
32.5
43.3
54.2
65.0
86.6
108.3
130.0
162.5
194.9
216.6
N/A
N/A
6.3
12.5
18.8
25.0
31.3
37.5
50.0
62.5
75.0
93.8
112.5
125
156
188
11
8.3
16.7
25.0
33.3
41.6
50.0
66.6
83.3
99.9
124.9
149.9
166.7
208.4
250
7.2
14.4
21.7
28.9
36.1
43.3
57.7
72.2
86.6
108.3
129.9
145
181
217
3.6
7.2
10.8
14.4
18.0
21.7
28.9
36.1
43.3
54.1
65.0
72
90
108
WIRING DIAGRAMSWIRING DIAGRAMS
DIAGRAM 1.
SMALL COMMERCIAL WIRE DIAGRAM
208-240V / 3PH
DIAGRAM 2.
SMALL COMMERCIAL WIRE DIAGRAM
208-240V / 3-1PH
12
3-1 PHASE CONVERSIONS
In the case where the unit is phase convertible and it has only one contactor, jumper wires (provided) must be added according to the
phase of the supply voltage. See the diagram below. For single-phase connection, jumpers A-C and B-D must be added. For threephase connection, jumper B-C must be added.
3-1 PHASE CONTACTOR JUMPER CONFIGURATION
1 PHASE CONNECTION 3 PHASE CONNECTION
DIAGRAM 3.
SMALL COMMERCIAL WIRE DIAGRAM
SINGLE PHASE
13
DIAGRAM 4.
SMALL COMMERCIAL WIRE DIAGRAM
300-600V / 3PH
DIAGRAM 5.
SMALL COMMERCIAL ELECTRIC
300-600V 3ph, Linear or Progressive
14
OPERATION
GENERAL
Refer to the Features and Components section of this manual for the
location of components mentioned in the instructions that follow.
NEVER operate the heating elements without being certain the water
heater is lled with water, and a temperature and pressure relief valve
is installed in the relief valve opening on top of the heater.
Some models will be equipped with an optional LWCO (low water
cut off). The water probe is installed in the storage tank – see the
Features and Components illustrations at the beginning of this
manual for location. The control system will declare a Fault condition
and lock out (de-energize contactor coils and heating elements) if
the water level is below this point.
The pilot switch (power on/off toggle switch) on the cabinet front
permits the heater to be turned on and off without having to operate
the electrical disconnect switch.
Optional manual override switches on the cabinet front allow elements
to be manually de-energized if full capacity is not needed.
7. Close the cabinet door and perform start up checks listed below
before turning on the electricity.
INITIAL START UP
The following checks should be made by the installer when the water
heater is placed into operation for the rst time:
1. Check all factory and eld made water and electrical
connections for tightness. Also check connections on top of the
heater. Repair water leaks and tighten electrical connections
as necessary.
2. Turn on the electrical disconnect switch and pilot toggle switch.
The pilot toggle switch is located on cabinet.
3. Observe the operation of the electrical components during the
rst heating cycle. Use care as the electrical circuits are
energized.
Temperature control and contactor operation should be checked
by allowing heater to come up to temperature and shut off
automatically. USE CARE AS THE ELECTRICAL CIRCUITS ARE
ENERGIZED.
DRAINING THE WATER HEATER
The water heater must be drained if it is to be shut down and/
or exposed to freezing temperatures. Maintenance and service
procedures may also require draining the heater.
1. Turn off the electrical disconnect switch.
FILLING THE WATER HEATER
To ll the water heater with water:
1. Turn off the electrical disconnect switch.
2. Turn off pilot toggle switch.
3. Close the heater drain valve.
4. Open a nearby hot water faucet to allow the air in the system to escape.
5. Fully open the cold water inlet valve, lling the heater and piping.
6. Close the hot water faucet when water starts to ow from the
faucet. Leave the cold water inlet valve fully open. The heater is
now ready for start up and temperature regulation.
2. Turn off pilot toggle switch.
3. Open a nearby hot water faucet until the water is no longer hot.
4. Close the cold water inlet valve to heater.
5. Open drain valve.
6. If the heater is being drained for an extended shutdown, it is
suggested the drain valve be left open during this period.
Follow FILLING instructions when restoring hot water service, see
the list above.
15
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