Bradford White 238-16152-00F Supplement

238
-
16152
-
00F REV 12/03
COMMERCIAL ELECTRIC WATER HEATER
La version espanola de estas instrucciones se puede obtener al escribirle a la
fábrica cuyo nombre aparece in la placa de especificaciones.
A Spanish language version of these instructions is available by contacting the
manufacturer listed on the rating plate.
THE WARRANTY ON THIS WATER HEATER IS IN EFFECT ONLY WHEN
THE WATER HEATER IS INSTALLED AND OPERATED IN ACCORDANCE
WITH LOCAL CODES AND THESE INSTRUCTIONS. THE
MANUFACTURER OF THIS HEATER WILL NOT BE LIABLE FOR ANY
DAMAGE RESULTING FROM FAILURE TO COMPLY WITH THESE
INSTRUCTIONS. READ THESE INSTRUCTIONS THOROUGHLY BEFORE
STARTING.
For safety, convenience, and best performance, we recommend
this water heater be installed and serviced by a plumbing
professional.
INSTALLATION & OPERATING
INSTRUCTION MANUAL
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CONGRATULATIONS!
You have just purchased one of the finest water heaters
on the market today!
This installation, operation and instruction manual will
explain in detail the installation and maintenance of your
new Commercial Electric Water Heater. We at Bradford
White strongly recommend that you contact a plumbing
professional for the installation of this water heater.
We require that you carefully read this manual, as well as
the enclosed warranty, and refer to it when questions
arise. If you have any specific questions concerning your
warranty, please consult the plumbing professional from
whom your water heater was purchased. For your
records we recommend that you write the model, serial
number and installation date of your water heater in the
maintenance section in the back of this manual.
This manual should be kept with the water heater.
At Bradford White we’re committed to providing you with
the finest water heater made.
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TABLE OF CONTENTS
General Information................................................................... 4
Installation.................................................................................... 5
Locating The Water Heater .................................................... 5
Water Connections.................................................................. 8
Electrical Connections............................................................ 14
Amperage Chart ....................................................................... 15
GPH Recovery Capacities...................................................... 15
General Operation...................................................................... 16
Thermostat Adjustment........................................................... 17
Maintenance................................................................................ 19
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GENERAL INFORMATION
The design of this electric water has been listed with Underwriters’
Laboratories, Inc. (UL) as complying with UL standard UL1453.
This water heater must be installed in accordance with local codes. In the
absence of local codes, install this water heater in accordance with the N.E.C.
Reference Book (latest edition).
The warranty for this water heater is in effect only when the water heater is
installed, adjusted and operated in accordance with these Installation and
Operating Instructions. The manufacturer will not be held liable for damage
resulting from alteration and/or failure to comply with these instructions.
This water heater has been designed and listed for the purpose of heating
potable water. The installation and use of this water heater for any purpose
other than the heating of potable water may cause damage to the water heater
and create a hazardous condition and nullify the warranty.
Do not use this appliance if any part has been under water. Immediately call a
qualified service technician to inspect the appliance and to replace any part of
the control system and/or any gas control, which has been under water.
Depending upon individual circumstances, it may be necessary to replace the
entire water heater.
Make sure that the rating plate on the water heater is referenced for certainty
that the correct voltage is being supplied to the water heater.
CAUTION
Incorrect operation of this appliance may create a hazard to life and
property and will nullify the water.
DANGER
Do not store or use gasoline or other flammable, combustible or
corrosive vapors and liquids in the vicinity of this or any other
appliance.
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General Information continued-
A sacrificial anode(s) is used to extend tank life. Removal of any anode, for
any reason, will nullify the warranty. In areas where water is unusually active,
an odor may occur at the hot water faucet due to a reaction between the
sacrificial anode and impurities in the water. If this should happen, an
alternative anode(s) may be purchased from the supplier that installed this
water heater. This will minimize the odor while protecting the tank.
Additionally, the water heater should be flushed with appropriate dissolvers to
eliminate any bacteria.
IMPORTANT
Before proceeding, please inspect the water heater and its components for
possible damage. DO NOT install any damaged components. If damage is
evident, please contact the supplier where the water heater was purchased or
the manufacturer listed on the rating plate for replacement parts.
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INSTALLATION
Locating The Water Heater
Thiswater heater must NOT be installed in any location where gasoline
or flammable vapors are likely to be present, unless the installation is
such to eliminate the ignition of gasoline or flammable vapors.
The location for the installation of this water heater is of utmost importance.
Before installing this water heater, consult the installation section of these
instructions. After reading these installation and operating instructions, select
a location for the water heater where the floor is level and is easily accessible
to a power supply and water connections. It is recommended that the water
heater be located near the center of greatest hot water usage to prevent heat
loss through the pipes. DO NOT locate the water heater where water
lines could be subjected to freezing temperatures. Locate the water
heater so that access panels and drain valves are accessible.
Water heater corrosion and component failure can be caused by the heating
and breakdown of airborne chemical vapors. Examples of some typical
compounds that are potentially corrosive are: spray can propellants, cleaning
solvents, refrigerator and air conditioning refrigerants, swimming pool
chemicals, calcium or sodium chloride, waxes and process chemicals. These
materials are corrosive at very low concentration levels with little or no odor to
reveal their presence. NOTE: DAMAGE TO THE WATER HEATER CAUSED
BY EXPOSURE TO CORROSIVE VAPORS IS NOT COVERED BY THE
WARRANTY. DO NOT OPERATE THE WATER HEATER IF EXPOSURE
HAS OR WILL OCCUR. DO NOT STORE ANY POTENTIALLY CORROSIVE
COMPOUNDS IN THE VICINITY OF THE WATER HEATER.
Locating The Water Heater continued-
This water heater must be located in an area where leakage of the tank or
water line connections and the combination temperature and pressure relief
WARNING
Water heaters are heat-producing appliances. To avoid damage or injury,
there must be no materials stored against the water heater and proper care
must be taken to avoid unnecessary contact (especially by children) with the
water heater. UNDER NO CIRCUMSTANCES SHALL FLAMMABLE
MATERIALS, SUCH AS GASOLINE OR PAINT THINNER BE USED OR
STORED IN THE VICINITY OF THIS WATER HEATER OR ANY LOCATION
FROM WHICH FUMES COULD REACH THE WATER HEATER.
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valve will not result in damage to the area adjacent to the water heater or to
lower floors of the structure. When such locations cannot be avoided, a
suitable drain pan must be installed under the water heater. The drain pan
must be no greater than 1 1/2 in. (3.8 cm) deep and have a minimum length
and width of at least 4 in. (10.2 cm) measured from the jacket of the water
heater. The drain pan, as described above, can be purchased from your
plumbing professional. The drain pan must be piped to an adequate drain.
The piping must be pitched for proper drainage.
Water Connections
NOTE: BEFORE PROCEEDING WITH THE INSTALLATION, CLOSE THE
MAIN WATER SUPPLY VALVE.
After shutting the main water supply valve, open a faucet to relieve the water
line pressure to prevent any water from leaking out of the pipes while making
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the water connections to the water heater. After the pressure has been
relieved, close the faucet. The cold water inlet line connects to the inlet nipple
at the base of the water heater. The hot water outlet line connects to the
nipple on top of the water heater. The fittings at the cold water inlet and hot
water outlet are dielectric waterway fittings with tapered male threads. Make
the proper plumbing connections between the water heater and the plumbing
system in the structure. Install a shut-off valve in the cold water supply line.
If this water heater is installed in a closed water supply system, such as one
having a back-flow preventer in the cold water supply, provisions shall be made
to control thermal expansion. DO NOT operate this water heater in a closed
system without provisions for controlling thermal expansion. Your water
supplier or local plumbing inspector should be contacted on how to control this
situation.
After installation of the water lines, open the main water supply valve and fill
the water heater. While the water heater is filling, open several hot water
faucets to allow air to escape from the water system. After a steady stream of
water flows from the faucets, close them and check all water connections for
possible leaks. NEVER OPERATE THE WATER HEATER WITHOUT FIRST
BEING CERTAIN IT IS FILLED WITH WATER.
Water Connections continued-
CAUTION
If sweat fittings are to be used, DO NOT apply heat to the nipples on top of
the water heater. Sweat the tubing to the adapter before fitting the adapter
to the water connections. It is imperative that heat is not applied to the
nipples containing a plastic liner.
IMPORTANT
FAILURE TO INSTALL AND MAINTAIN A NEW, LISTED TEMPERATURE-
PRESSURE RELIEF VALVE WILL RELEASE THE MANUFACTURER
FROM ANY CLAIM, WHICH MIGHT RESULT FROM EXCESSIVE
TEMPERATURE AND PRESSURES.
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Water Connections continued-
WARNING
For protection against excessive temperatures and pressure, install
temperature and pressure protective equipment required by local codes, but
not less than a combination temperature and pressure relief valve certified by
a nationally recognized testing laboratory that maintains periodic inspection
of production of listed equipment or materials, as meeting the Requirements
for Relief Valves and Automatic Gas Shutoff Devices for Hot Water Supply
Systems, ANSI Z21.22, and the Standard CAN1-4.4 Temperature, Pressure,
Temperature and Pressure Relief Valves and Vacuum Relief Valves. The
combination temperature and pressure relief valve must be marked with a
maximum set pressure, not to exceed the maximum working pressure of the
water heater. The combination temperature and pressure relief valve shall
also have an hourly rated temperature steam BTU discharge capacity not
less than the hourly input rating of the water heater.
Install the combination temperature and pressure relief valve into the opening
provided and marked for this purpose on the water heater
Note: Some models may already be equipped or supplied with a
combination temperature and pressure relief valve. Verify that the
combination temperature and pressure relief valve complies with local codes.
If the combination temperature and pressure relief valve does not comply
with local codes, replace it with one that does. Follow the installation
instructions above on this page.
Install a discharge line so that water discharged from the combination
temperature and pressure relief valve will exit within six (6) inches (15.3 cm)
above, or any distance below the structural floor and cannot contact any live
electrical part. The discharge line is to be installed to allow for complete
drainage of both the temperature and pressure relief valve and the discharge
line. The discharge opening must not be subjected to blockage or freezing.
DO NOT thread, plug or cap the discharge line. It is recommended that a
minimum of four (4) inches (10.2 cm) be provided on the side of the water
heater for servicing and maintenance of the combination temperature and
pressure relief valve.
Do not place a valve between the combination temperature and pressure
relief valve and the tank.
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Water Connections continued-
WARNING
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 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 flow. There should be no smoking or open
flame near the faucet at the time it is open.
CAUTION
INCREASING THE THERMOSTAT SETTING ABOVE THE PRESET
TEMPERATURE MAY CAUSE SEVERE BURNS AND CONSUME
EXCESSIVE ENERGY. HOTTER WATER INCREASES THE RISK OF
SCALD INJURY.
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This water heater can deliver scalding temperature water at any faucet in the
system. Be careful whenever using hot water to avoid scalding injury. Certain
appliances, such as dishwashers and automatic clothes washers, may require
increased temperature water. By setting the thermostat on this water heater
to obtain increased temperature water required by these appliances, you might
create the potential for scald injury. To protect against injury, you should
install an ASSE approved mixing valve in the water system. This valve will
reduce point of discharge temperature by mixing cold and hot water in branch
supply lines. Such valves are available from the manufacturer of this water
heater or a local plumbing supplier. Please consult with a plumbing
professional.
Water Connections continued-
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Figure 1
(Dual Temperature System With Mixing Valve)
Figure 2
(Single Installation With Storage Tank Gravity Circulation)
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Water Connections continued-
Figure 3
(Dual Water Heater Installation)
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Electrical Connections
Before any electrical connections are made, be sure that the water heater is
full of water and that the manual shut-off valve in the cold water supply line is
open. If the heating elements are not completely immersed in water at all
times, they will be damaged (burned-out) if energized for even a short period of
time. The warranty does not cover burned-out heating elements. Check the
rating plate and wiring diagram before proceeding. This electric water heater
was built and wired in accordance with the Underwriters Laboratories testing
approvals requirements. The temperature-limiting device is of the manual
reset, trip-free type and has been factory installed to interrupt all ungrounded
power supply conductors in the event of thermostat failure. The plumbing
supplier in your area ordered this water heater wired at the factory to comply
with existing area codes, but local utility codes may require or allow other
circuitry. Consult your local power company to determine the correct electrical
hook-up in order to meet local utility and building codes and in order to obtain
the most economical rates. All electrical connections to elements,
thermostats, and contactors (certain models) have been made at the factory.
DO NOT alter any of the internal wiring. Wiring connections may loosen
during shipment. Check all connections for tightness.
To make the wiring connections to a power supply, follow the steps below.
A) Open cover door of the control box.
B) Bring the power leads from an adequately fused disconnect switch (not
furnished with the water heater due to varying state and local codes) and
connect to the terminal block. Where long runs, local ordinances or utility
company necessitates, an increase in size may be required.
C) This water heater must be properly grounded. A ground lug is provided
within the electrical control box for connection to a properly sized
ground. (See wiring diagram for minimum required ground size. Wiring
diagram is located on the inside door of the control box)
D) Close cover door of the control box.
Heating Elements
To replace heating elements, disconnect power to the water heater, drain tank
and replace element. To remove a heating element, use a 1 1/2” screw type
element wrench available from most supply houses. Do not over-tighten the
new element, as this will cause distortion in the new element gasket. Once
the element has been replaced, follow the instructions “To Fill The Water
Heater”. It is imperative that the water heater is full before power is restored to
the heating elements.
Electrical Connections continued-
Amperage Chart
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kW 208V 240V 277V 380V 415V 480V
Input 1Ø 3Ø 1Ø 3Ø 1Ø 3Ø 3Ø 1Ø 3Ø
629 17 25 14 22 9812 7
943 25 38 22 32 14 13 19 11
12 58 33 50 29 43 19 17 25 14
13.5 65 38 56 32 49 21 19 28 16
15 72 42 63 36 54 23 21 31 18
18 87 50 75 43 65 28 25 38 22
24 115 67 100 58 87 37 34 50 29
27 130 75 113 65 97 41 38 56 32
30 144 83 125 72 108 46 42 63 36
36 173 100 150 87 130 55 50 75 43
45 216 125 188 108 162 69 63 94 54
54 260 150 225 130 195 83 75 113 65
Water heaters with amperage draw of 48 AMPS or more require factory installed
internal fusing to comply with Underwriters Laboratories requirements.
GPH Recovery Capacities
kW Temperature Rise
Input
40°F 50°F 60°F 70°F 80°F 90°F 100°F 120°F 140°F
662 50 41 35 31 28 25 21 18
993 74 62 53 47 41 37 31 27
12 124 99 83 71 62 55 50 41 35
13.5 140 112 93 80 70 62 56 47 40
15 155 125 103 89 78 69 62 52 44
18 186 149 124 106 93 83 74 62 53
24 248 199 164 142 124 110 99 83 71
27 279 223 186 160 140 124 112 93 80
30 310 248 207 177 155 138 124 103 89
36 372 298 248 213 186 165 149 124 106
45 465 372 310 266 233 207 186 155 133
54 558 447 372 319 279 248 223 186 160
Multiply kW input by 3,412 to determine BTU input:
Example: 54kW x 3412 = 184,248 BTU’s
Recovery Computation Formula
GPH= (watts x 3.412) / (8.25 x °Temp. Rise)
GENERAL OPERATION
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Before closing the switch to allow electric current to flow to the water heater,
make certain that the water heater is full of water and that the cold water inlet
valve is open. Complete failure of the heating elements will result if they are
not totally immersed in water at all times. When the switch is closed, the
operation of this electric water heater is automatic. Surface mounted
thermostats are preset to the “HOT” setting to provide a water temperature of
approximately 120°F (49°C) to reduce the risk of scald injury. For water
heaters with immersion type thermostats, the temperature control knob
located on the side on the control box is factory preset to 120°F (49°C). Care
must be taken whenever using hot water to avoid scalding injury. Certain
appliances require high temperature hot water (such as dishwashers and
automatic clothes washers).
TO FILL THE WATER HEATER
1. Close the water heater drain valve by turning the knob clockwise.
2. Open the cold water supply shut-off valve.
3. Open several hot water faucets to allow air to escape from the system.
4. When a steady stream of water flows from the faucets, the water heater is
filled. Close the faucets and check for water leaks at the water heater drain
valve, combination temperature and pressure relief valve and the hot and
cold water connections.
5. Reconnect power supply to water heater.
TO DRAIN THE HEATER
Should it become necessary to completely drain the water heater, make sure
you follow the steps below:
1. Disconnect the power supply to the heater. Consult the plumbing
professional or electric company in your area for service.
2. Close the cold water supply shut-off valve.
3. Open the drain valve on the water heater by turning the knob counter-
clockwise. The drain valve has threads on the end that will allow
connection of a standard hose coupling.
4. Open a hot water faucet to allow air to enter the system.
To refill the water heater, refer to “TO FILL THE WATER HEATER.”
Thermostat Adjustment
There are two types of thermostats this electric water heater may come
equipped with from the factory. One type, surface mounted thermostats,
CAUTION
Scalding may occur within five (5) seconds at a temperature setting of
135°F (57°C).
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directly contacts the water heater tank surface (see Figure 4). The second
type, immersed type are immersed within the water heater tank and uses
contactor type relays. Before any work is done on the water heater,
disconnect all power to the water heater by opening the switch at the main
electrical circuit breaker or fuse box. Before adjusting or setting surface
mounted type thermostat(s), disconnect all power to the water heater.
To gain access to the surface mounted thermostat(s), remove the outer
access panel and fiberglass insulation. Using a screwdriver rotate the
thermostat dial on each thermostat clockwise to increase the water
temperature. After adjusting the surface mounted thermostats, replace the
fiberglass insulation making sure that the controls are well covered and that
the plastic terminal shield has not been displaced; replace the access panel.
Once the water heater has been filled with water, electrical power may be
restored to the water heater and the water heater is ready for operation. To
adjust or set the water temperature for water heaters using immersed type
thermostat(s), locate the temperature control dial on the right side of the lower
control box. To increase the water temperature, rotate the temperature control
dial clockwise (see Figure 5). The thermostat(s) or temperature control dial
has been factory preset to approximately 120°F (49°C).
Thermostat Adjustment continued-
DANGER
Hotter water increases the risk of scald injury. Scalding may occur within five
(5) seconds at a temperature setting of 135°F (57°C). To protect against hot
water injury, install an ASSE approved mixing valve in the water system. This
valve will reduce point of discharge water temperatures by mixing cold and hot
water in branch water lines. A licensed plumbing professional or local
plumbing authority should be consulted.
Note: This water heater is equipped with an energy cut out device to prevent
overheating. Should overheating occur, turn off the electrical supply to the
water heater and contact a qualified service technician.
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Figure 4
Figure 5
MAINTENANCE
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Shut off the electric power whenever the water supply to the water heater is off.
Shut off the electric power and water supply, drain the heater completely to
prevent freezing whenever the building is left unoccupied during the cold
weather months. In order to insure efficient operation and long tank life, drain
the water heater at least once a month through the drain valve until the water
runs clear. Failure to do this may result in noisy operation and lime and
sediment buildup in the bottom of the tank. Check the temperature-pressure
relief valve to insure that the valve has not become encrusted with lime. Lift the
lever at the top of the valve several times until the valve seats properly without
leaking and operates freely.
The following, maintenance should be performed by a qualified service
technician at the minimum periodic intervals suggested below. In some
installations, the maintenance interval may be more frequent depending on the
amount of use and the operating conditions of the water heater. Regular
inspection and maintenance of the water heater will help to insure safe and
reliable operation.
1. Annually, check the operation of the thermostat(s).
2. Bi-annually, check the seal around the heating elements for leaks. If there
is any sign of leaking, disconnect the power supply to the water heater and
contact the plumbing professional that installed this water heater or a
qualified service technician.
Maintenance continued-
IMPORTANT
The water heater should be inspected at a minimum of annually by a
qualified service technician for damaged components. DO NOT operate this
water heater if any part is found damaged.
WARNING
When lifting lever of temperature-pressure relief valve, hot water will be
released under pressure. Be certain that any released water does not
result in bodily injury or property damage. The magnesium anode rod
should be inspected periodically and replaced when necessary to prolong
tank life.
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3. At least once a year, check the combination temperature and pressure relief
valve to insure that the valve has not become encrusted with lime. Lift the
lever at the top of the temperature-pressure relief valve several times until
the valve seats properly without leaking and operates freely.
4. If the combination temperature and pressure relief valve on the appliance
discharges periodically, this may be due to thermal expansion in a closed
water supply system. Contact the water supplier or local plumbing
inspector on how to correct this situation. Do not plug the combination
temperature and pressure relief valve outlet for any reason.
5. Monthly, drain off a gallon of water from the water heater to remove silt and
sediment.
6. A combination sacrificial anode rod/hot water outlet nipple has been
installed to extend tank life. The anode rod should be inspected
periodically (every 2 years) and replaced when necessary to prolong tank
life. Water conditions in your area will influence the time interval for
inspection and replacement of the anode rod. Contact the plumbing
professional who installed the water heater or the manufacturer listed on the
rating plate for anode replacement information. The use of a water softener
may increase the speed of anode consumption. More frequent inspection of
the anode is needed when using softened (or phosphate treated) water.
7. If this water heater is equipped with fuses, before removing any fuse,
disconnect the all power to the water heater. Open the upper control box
door and replace fuses according to the size indicated on the wiring
diagram affixed to the inside of the door.
Maintenance continued-
Contact your local plumbing supplier or plumbing professional for replacement
parts or contact the company at the address displayed on the rating plate of
the water heater.
WARNING
When lifting lever of temperature-pressure relief valve, hot water will be
released under pressure. Be certain that any released water does not result
in bodily injury or property damage.
WARNING!: THIS WATER MAY BE HOT.
CAUTION
FOR YOUR SAFETY, DO NOT ATTEMPT TO REPAIR THERMOSTAT(S),
HEATING ELEMENTS, OR ELECTRICAL WIRING. REFER SUCH REPAIRS
TO A QUALIFIED SERVICE TECHNICIAN.
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