Lochinvar 100167334 119 gal. Lock Temperature Round Jacketed Storage Tank Installation manual

LST-I-O Rev C
STORAGE TANK
INSTALLATION and OPERATION
MANUAL
WARNING: If the information in this
manual is not followed exactly, a fire or
explosion may result causing property damage,
personal injury or loss of life.
-- This storage tank MUST NOT be installed in
any location where gasoline or flammable vapors
are likely to be present.
-- WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electric switch; do not use any
phone in your building.
• Immediately call your gas supplier from a near by
phone. Follow the gas supplier’s instructions.
• If you cannot reach your gas supplier, call the fire
department.
• Installation and service must be performed by a
qualified installer, service agency, or the gas
supplier.
WARNING
LOW LEAD CONTENT
The information contained in
this manual is intended for use by
qualified professional installers, or
service technicians. Consult your
local expert for proper installation
or service procedures.
Save this manual for future reference.
Contents
CONTENTS........................................................................ 2
HAZARD DEFINITIONS ..................................................... 2
1. GENERAL INFORMATION ........................................... 3
Tank construction ...................................................... 3-4
2. INSTALLATION............................................................. 5
Transporting and unpacking the unit ............................ 5
Examining the unit ....................................................... 5
Anchoring the unit ......................................................... 5
Recommended service clearances ............................. 5
Connecting the hot water source .................................. 5
Hot water outlet ............................................................ 6
Mixing valve .................................................................. 6
Aquastat / bulbwell ....................................................... 6
Piping the relief valve ................................................... 6
Drain ............................................................................. 6
Completing the installation ........................................... 6
3. OPERATION ................................................................. 7
Startup procedure .......................................................... 7
Shutdown procedure...................................................... 7
4. INSPECTION ................................................................ 8
5. MAINTENANCE ............................................................ 9
Flushing the tank .......................................................... 9
Cleaning the tank .......................................................... 9
Magnesium anode rod inspection............................... 10
Water piping and valve replacement .......................... 11
Temperature and pressure gauge replacement ......... 11
Revision Notes .................................................. Back Cover
Hazard definitions
The following defined terms are used throughout this manual to bring attention to the presence of hazards of various risk
levels or to important information concerning the life of the product.
DANGER
DANGER indicates an imminently hazardous situation which, if not avoided, will result in death or serious
injury.
WARNING indicates a potentially hazardous situation which, if not avoided, could result in death or
WARNING serious injury.
CAUTION indicates a potentially hazardous situation which, if not avoided, may result in minor or
CAUTION moderate injury.
CAUTION
CAUTION used without the safety alert symbol indicates a potentially hazardous situation which, if not
avoided, may result in property damage.
NOTICE
NOTICE indicates special instructions on installation, operation, or maintenance that are important but not
related to personal injury or property damage.
Hot Water Can Scald!
•
Water heated to temperatures for clothes washing, dish washing, and other sanitizing needs can
scald and cause permanent injury.
•
Children, elderly, and infirm or physically handicapped persons are more likely to be
permanently injured by hot water. Never leave them unattended in a bathtub or shower.
Never allow small children to use a hot water tap or draw their own bath.
•
If anyone using hot water in the building fits the above description, or if state laws or
local codes require certain water temperatures at hot water taps, you must take special
precautions:
•
Use lowest possible temperature setting.
•
Install some type of tempering device, such as an automatic mixing
valve, at hot water tap or water heater. Automatic mixing valve must be selected and
installed according to valve manufacturer’s recommendations and instructions.
•
Water passing out of drain valves may be extremely hot. To avoid injury:
•
Make sure all connections are tight.
•
Direct water flow away from any person.
Protection Must Be Taken Against Excessive Temperature and Pressure!
--Installation of a Temperature & Pressure (T&P) relief valve is required.
2
Storage Tank Installation and Operation Manual
1
General information
The following chart (Table 1A) 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.
Table 1A Approximate Time / Temperature Scald Chart
APPROXIMATE TIME / TEMPERATURE
RELATIONSHIPS IN SCALDS
120°F
More than 5 minutes
125°F
1 1/2 to 2 minutes
130°F
About 30 seconds
135°F
About 10 seconds
140°F
Less than 5 seconds
145°F
Less than 3 seconds
150°F
About 1 1/2 seconds
155°F
About 1 second
WARNING
• Before using product, read and
understand instructions.
• Save these instructions for future
reference.
• All work must be performed by
qualified personnel trained in the
proper application, installation, and
maintenance of the water systems in
accordance with all applicable codes
and ordinances.
• To prevent serious burns, wear heat
resistant gloves when handling hot
equipment.
Failure to follow this warning could
cause property damage, personal injury,
or death.
This manual is intended to cover installation, operation,
and maintenance procedures for Lochinvar’s Hot Water
Storage Tank. Some storage tanks are built to meet customer
specifications. Instructions may not be specific to every system.
If questions are not answered by this manual, or if specific
installation, operation, and/or maintenance procedures are not
clearly understood, contact Lochinvar for clarification before
proceeding.
Most Hot Water Storage Tanks are designed for indoor use
only, unless otherwise constructed by design specifications. It
should be located on a level surface (no more than one-half
degree of slope), capable of supporting the total weight of the
unit when filled to capacity.
The unit should be mounted to the floor following applicable
architectural and local code requirements for the specific
installation site. NOTE: Tanks do not come standard with
floor tie downs. Seismic tie downs are available upon request.
The high quality enamel paint, applied to the jacket of the
unit, will provide years of protection against corrosion. If it is
necessary to clean the outside of the unit, a mild cleaning agent
should be used that will not damage the paint.
For all piping connections, the use and/or type of joint
compound or sealer on the joints should be determined
by referring to local codes, accepted standards, and/or the
requirements of the installing contractor.
Tank construction
Hot Water Storage Tanks are pre-engineered and pre-assembled
complete with all fittings. And like every Lochinvar product,
they are thoroughly tested to ensure proper performance from
the moment they are installed.
Gallon Capacities -- Lochinvar tanks are available in gallon
capacities from 120 to 5000 gallons. Standard construction
tanks from 120 to 940 gallons are maintained in regular
inventory. Tanks over 1000 gallons are custom manufactured
per order.
Tank Orientation -- Lochinvar tanks are available in vertical or
horizontal orientation.
Tank Lining -- Lochinvar tanks are available in glass (standard)
or cement (optional) linings, and unlined.
ASME -- All Lochinvar storage tanks are constructed per ASME
Section IV requirements, or Section VIII.
Pressure Rating -- Lochinvar tanks are available in 125 psi
working pressure (standard) or 150 psi working pressure
(optional).
Cathodic Protection -- All glass lined tanks are equipped with
magnesium anodes to provide protection against corrosion.
3
Storage Tank Installation and Operation Manual
1
General information
Manway - A 12" x 16" manway is provided as an option on
glass lined tanks and is standard on cement lined tanks. Four
by six inch (4" x 6") hand holes are available on tanks under
300 gallons. Manways may not be installed on tanks under
30" diameter.
WARNING
1. All water lines, joints, and valves.
2. All power connections and cables.
3. If the unit has been in operation, allow
the water in the heater and all
components and surfaces (tank surface,
water piping, etc.,) to cool before
starting the procedure.
Jacketing -- Lochinvar tanks are available as “Bare”, having
no jacket or insulation.
Tanks with a round sheet metal jacket are insulated with a 2"
thick foam mixture that has an R value of R-16. Square sheet
metal jacketed tanks are insulated with a 3 1/2" thick fiberglass
wrap that has an R value of R-13. These tanks are for indoor
installation only.
4. Assure that all power to associated water
heating equipment has been shut off
and disconnected before attempting
any procedures.
Outdoor rated tanks are available with 2" thick foam insulation
with no exposed metal surfaces. All jacketed storage tanks
meet the energy efficiency requirements of the latest edition
of ASHRAE 90.1.
Relief Valve Tapping -- A tapping is provided for the
installation of a field supplied ASME safety relief valve.
5. Assure that all incoming and outgoing
water lines have been shut off at the
manual shutoff valves.
WARNING
Heated water presents situations that
can be very dangerous due to the fact
they are under pressure and at very high
temperatures. To avoid possible injury or
death, use common sense and follow all
accepted and recommended procedures
when performing installation, operation,
and maintenance procedures.
WARNING
The combination of electricity and water
can pose a very dangerous situation.
Assure that all power has been shut off
/ disconnected before attempting any
installation or maintenance procedures.
Hot Water Recirculation Tappings -- Lochinvar storage
tanks will have two (2) tappings on the tank to provide
recirculation piping between the tank and a hot water
source.
These tappings may be ordered in custom sizes, either threaded
or flanged. Extra tappings are also available upon request.
Hot Water Outlet -- A Hot Water Outlet Tapping is positioned
on the top of the tank for connection to the building
system.
This tapping may be ordered in custom sizes, either threaded or
flanged. Extra tappings are also available upon request.
Drain -- A tapping or drain pipe will be connected to a low
point on the tank for drainage.
Temperature and Pressure Gauge (optional) -- Lochinvar
tanks may be fitted with an optional temperature and
pressure gauge.
Aquastat Bulbwell -- All Lochinvar tanks are provided with a
bulbwell for the location of control sensors.
Five-Year Limited Tank Warranty -- Provides warranty
protection against tank failure (see warranty for details).
One-Year Limited Warranty -- Parts and accessories (see
warranty for details).
4
Areas of potential danger:
Storage Tank Installation and Operation Manual
2
Installation
Transporting and unpacking the
unit
Each jacketed Lochinvar Hot Water Storage Tank is crated
as necessary at the factory. The crating is designed to provide
protection for the unit during transportation, and to provide
a safe means by which to lift and move the unit with a fork
lift or hand truck.
Examining the unit
After the unit has been uncrated and set in place, it should be
carefully examined to assure the tank has not been damaged
during shipping. If any evidence of damage is detected that
could affect the safe operation of the unit, contact Lochinvar
, LLC., or your authorized sales representative, to report the
damage and to receive instructions on how to proceed.
After the unit and all components have been inspected for
damage, it is suggested that all optional or independent
pressure and temperature control components be checked
to assure that they meet or exceed design specifications.
If any discrepancy is found, contact Lochinvar, LLC., or
your authorized representative, before proceeding with the
installation.
Anchoring the unit
The unit should be anchored to the floor, following applicable
architectural / local code requirements, or accepted standards
for the specific installation site. The unit should be installed
in a location with sufficient clearance for service and repair.
Recommended service clearances:
•
•
24 inches around the magnesium anode rod(s)
24 inches around the manway or hand hole
Connecting the hot water source
Before making any connections of water
WARNING inlet or outlet to the unit, assure that
all piping is clean and free of foreign
material or scale. This can usually be
accomplished by “blowing out” the pipe.
Any foreign material or scale entering the
unit can adversely affect operation and
performance.
The two (2) tappings on the lower side of a vertical tank or
the two (2) tappings on the bottom of a horizontal tank shall
provide recirculation between the tank and the water heating
source. See example piping diagram between a storage tank
and an indirect gas fired water heater (FIG’s 2-2 and 2-3).
The upper side tapping on a vertical storage tank is the tank’s
water recirculation inlet. The lower side tapping on a vertical
storage tank is the tank’s water recirculation outlet. On a
horizontal tank, either recirculation tapping can be used for
recirculation inlet or outlet.
NOTICE
Check local codes for Seismic anchoring requirements. If
further assistance is needed, call the Lochinvar Technical
Service Department and request a Seismic Report.
On horizontal tanks, the saddles should be located 6" to
12" from the head/shell seam. Both saddles must be placed
using the same dimensions (FIG. 2-1). If there are tappings
in the recommended space or if there are any concerns
about the proper location for the saddles, please contact the
manufacturer.
See the Water Heater’s Installation and
Operation manual for specific piping
diagrams that match the inlet / outlet
water tappings on the tank to the inlet /
outlet water tappings on the water heater.
Tapping locations on the water heater
may vary by product or manufacturer.
Figure 2-2_Vertical Tank Piping Diagram
COLD WATER SUPPLY
EXPANSION TANK
COPPER-FIN WATER HEATER
THERMOMETER
Figure 2-1_Saddle locations
BUILDING HOT
WATER SUPPLY
MIXING VALVE
RELIEF VALVE
INLET
RELIEF VALVE
OUTLET
STORAGE TANK
DRAIN
BUILDING RETURN
SADDLES
6” MIN TO 12” MAX
5
Storage Tank Installation and Operation Manual
2
Installation
Figure 2-3_Horizontal Tank Piping Diagram
COLD WATER SUPPLY
EXPANSION TANK
COPPER-FIN WATER HEATER
RELIEF VALVE
THERMOMETER
BUILDING HOT
WATER SUPPLY
INLET
RELIEF VALVE
OUTLET
MIXING VALVE
STORAGE TANK
DRAIN
BUILDING RETURN
NOTICE
For all piping connections, the use and
/ or type of joint compound or sealer
on the joint should be determined
by referring to local codes, accepted
practices, or the requirements of the
installing contractor.
If the cold water supply to the system is equipped with an
in-line check valve or backflow preventer, a suitable expansion
tank must be installed in the cold water supply line.
Hot water outlet
The next step in the installation process is to connect the hot
water system piping to the hot water outlet port. The hot
water supply tapping is located on top of the tank.
A manual shutoff valve should be installed downstream on
the hot water outlet line as an isolation device in case the
unit must be disconnected from the system. The shutoff
valve should be in the closed position and remain so until the
installation is complete.
In installations with more than one water heater, more than
one probe may need to be installed in the storage tank. A field
supplied brass or stainless steel bulbwell may be installed to
accommodate multiple sensing probes. The standard bulbwell
has a bulb area depth of 2 15/16" and can accommodate a
sensor/bulb that is 3/8" in diameter.
An optional “Super-Bulbwell” has a two chamber bulb area.
The inner chamber depth is 3" and can also accommodate a
3/8" diameter sensor/bulb. The outer chamber has a 3 5/16"
depth and can easily fit a 3/8" diameter sensor/bulb plus the
wires or capillary tube from the inner chamber sensor/bulb.
Contact Lochinvar customer service for information on special,
oversized bulbwells.
Piping the relief valve
(Relief valve is field
supplied)
All Lochinvar Hot Water Storage Tanks are equipped with a
relief valve tapping on the tank. The valve should be piped to
a discharge line leading to a suitable drain. Piping the pressure
relief valve to a suitable drain will prevent both water and heat
damage to the unit, as well as reduce the risk of injury from
released heated water. The pipe must be of adequate size to
properly handle the capacity of the relief valve and discharge
line.
Check local codes to assure compliance. If a check valve has
been installed on the inlet water line, thermal expansion may
take place causing build up of excessive pressure when the water
is being heated. This expansion will cause the relief valve to
open, releasing hot water to the discharge line. A properly sized
expansion tank must be installed to protect the system from
water expansion.
WARNING
Mixing valve
Field supplied. An anti-scald mixing valve is recommended
when storing domestic hot water above 115°F.
Do not install a manual shut off valve
between the relief valve and the discharge.
Doing so could cause serious injury or
death if the relief valve released and the
manual valve was closed. This would cause
excessive buildup of pressure in the storage
tank which could result in an explosion.
Aquastat bulbwell
Drain
Review the controls for the hot water source equipment. Some
equipment or systems designs will require an independent
aquastat (field supplied) to control the equipment. The
aquastat may be surface mounted onto the sheet metal
jacket of the tank or a nearby surface. The water sensing
probe may be installed in the dry bulbwell supplied with all
Lochinvar Hot Water Storage Tanks. The equipment may
employ a water sensing thermistor. The thermistor would be
installed into the dry bulbwell and wired back to the hot water
equipment.
The tanks’ drain connection must be piped to a suitable floor
drain. Brass drain cocks are acceptable. A brass full port ball
valve is recommended to improve water flow.
6
Completing installation
Installation of the Lochinvar Hot Water Storage Tank is now
complete. All documentation supplied with the unit should be
passed along to maintenance personnel for future reference.
Storage Tank Installation and Operation Manual
3
Operation
After all installation procedures have been completed, and
all water piping to the energy source and power connections
have been double checked, the unit is ready for operation.
The following Startup Procedure focuses on the storage tank.
Check the Installation and Operation Manual of the hot water
source for additional startup and shutdown procedures.
Shutdown procedure
1.
Turn off all power to the circulating pump and the hot
water source controls.
2.
Close all valves in the system in the following order:
• the hot water outlet line;
• the recirculation water piping
3.
Relieve the pressure where possible.
4.
After the system has cooled, drain the unit by opening
the tank drain valve and holding the relief valve
in the open position. This will prevent the formation of
a vacuum and increase the drainage flow.
5.
Proceed with the required maintenance or repairs.
6.
After performing the required maintenance or repairs,
return the unit to operation by following the Startup
Procedure.
Startup procedure
1.
Assure that all manual shutoff valves are closed.
2.
Slowly open the manual shutoff valve on the cold water
supply line and the valves in the hot water source
recirculation piping. Check to assure that there are not
leaks at the valve or any joints. Allow the tank to fill with
water. As the tank is filling, hold the relief valve
open to allow air to bleed out of the tank. Hot water
faucets at the highest location in the building should also
be opened. This will speed the filling process. Make sure
the tank is full of water and free of air.
Open the manual shutoff valves.
3.
4.
Turn on the recirculation pump between the water heater
and the tank.
After the power to the pump is turned on verify that the
pump is working. If the pump is an oil lubricated unit,
verify proper oiling.
Heated water presents situations that
WARNING can be very dangerous because of the
high temperatures and pressures. Use
common sense and follow all accepted
and recommended procedures when
performing installation, operation,
and maintenance procedures to avoid
possible injury or death.
5.
Follow the Startup procedure for the water heater to
initiate a call for heat. Adjust the operating temperature
control to the desired operating temperature and set the
safety high limit.
6.
As the unit is heating the water, carefully re-inspect water
recirculation piping and the tank hot water outlet for
signs of leakage.
7.
After the unit has reached operating temperature,
re-inspect all joints for signs of leakage. In addition,
check all gauges and controls to verify that the water
temperature and pressure are within design
specifications.
8.
The unit is now ready for normal operation.
7
Storage Tank Installation and Operation Manual
4
Inspection
The following table summarizes the recommended time intervals for inspections of the tank, components, water piping and
power connections.
RECOMMENDED INSPECTIONS
Time Interval
To Be Inspected
Circulating Pump
Per
Manufacturer
Specs
Weekly
Monthly
Quarterly

Gauges - Pressure &
Temperature

Lines - Inlet, Outlet, &
Return

Pressure Relief Valve
Shutoff Valves - Manual


Temperatures - Water &
Operating
Thermometer
Annually


Magnesium Anode Rods

Interior for Sediment or Scale

Flush tank at six (6) month
intervals
8

Storage Tank Installation and Operation Manual
5
Maintenance
A new tank installation should have a regular inspection
program set up. The first inspection should be within the
first three months of operation. Once the tendency to
accumulate sediment has been established, the inspection
program can be modified to suit the water conditions.
Typical inspection programs flush the tank at six-month
intervals and clean the tank in yearly intervals.
Deliming solvents or acid type flush agents are not
recommended for use in lined storage tanks. These
chemical cleaners are usually designed for use in nonpotable systems such as heating boilers. These chemicals
may be aggressive and cause damage to the tank lining
and deteriorate the magnesium anodes supplied in glasslined storage tanks.
WARNING
Hot water will be released under
pressure. Avoid contact with the hot
discharge water to prevent the risk of
severe scald injury.
Flushing the storage tank
Since mineral accumulation occurs in an un-fired tank it
will be in a soft sediment form. This soft sediment can be
removed by a regular flushing of the lower portion of the
tank.
To flush the tank, follow these steps:
1.
2.
Turn off electrical power to the circulating pump and any
other tank accessories.
Cleaning the storage tank
The mineral accumulation in an un-fired tank will be in a soft
sediment form that can be removed by a regular cleaning of
the lower portion of the tank. Many tanks will have a hand
hole or a larger manway to allow access to the interior of
the tank for complete removal of accumulated sediment.
An access opening to remove the manway or hand hole
is provided in the exterior jacket. The sheetmetal jacket
components are removed with hand tools. The opening will
be in the bottom portion of a vertical tank and on the end of
a horizontal tank (see FIG’s 5-1 and 5-2 below).
Figure 5-1_Vertical Tank
Ensure that the drain located on the bottom of the tank
is routed to a floor drain with adequate capacity to allow
the tank to be flushed.
4.
Open the drain valve and allow the incoming cold water
to flush the soft sediment out the bottom of the storage
tank. Use extreme caution, as the water exiting the tank
drain may be very hot. Avoid contact with the hot
discharge water to prevent the risk of severe scald injury.
C
1 1/4" T&P
RELIEF VALVE OPENING
**MANWAY
(OPTIONAL)
AQUASTAT
A
3" NPT
**Manway standard on cement and required on tanks with bundles 48” and larger.
Figure 5-2_Horizontal Tank
T&P GAUGE
CONNECTORS
(OPTIONAL)
Close the valve on the hot water outlet on top of the
storage tank.
3.
T&P GAUGE
CONNECTORS
(OPTIONAL)
2" NPT*
HOT WATER OUTLET
2" NPT*
HOT WATER OUTLET
LIFTING LUGS (OPTIONAL)
1 1/4" T&P
RELIEF VALVE
OPENING
**MANWAY
(OPTIONAL)
9"
5.
Observe the color of the water initially discharged from
the tank drain. This water will generally be milky or
slightly discolored by the sediment discharge. Allow the
drain to run until the water runs clear.
6.
Close the drain valve on the tank.
7.
Open the hot water outlet valve on top of the tank.
8.
Open an adjacent hot water tap to purge any air that may
have entered the storage tank during the draining
process. Close the hot water tap if no air discharge is
observed.
9.
Turn on electric power to the circulating pump and other
electrical components if necessary.
10. Observe tank and piping to ensure all components are
functioning properly.
END VIEW
DRAIN VALVE
3" NPT COLD WATER INLET
*3" NPT HOT WATER OUTLET ON 1250 GALLON AND UP.
** STANDARD ON CEMENT, AND REQUIRED ON TANKS
WITH BUNDLES 48" AND LONGER.
SIDE VIEW
9
Storage Tank Installation and Operation Manual
5
Maintenance
NOTICE
For this procedure, a new manway gasket
or hand hole gasket should be acquired
before beginning this procedure.
To clean the tank, follow these steps (reference FIG.’s 5-3
and 5-4):
12. Check the manway or hand hole and all related piping for
any water leaks.
13. Turn on electric power to the circulating pump and other
electric components if necessary.
14. Turn on the water heater.
1.
Turn off electrical power to the circulating pump and
other electrical components if necessary.
15. Open the valves in the hot water source recirculation
piping.
2.
Close the valve on the hot water outlet on top of the
storage tank and the cold water supply to the system.
16. Observe tank and piping to ensure all components are
functioning properly.
3.
Ensure that the drain located on the bottom of the tank
is routed to a floor drain with adequate capacity to allow
the tank to be drained.
Magnesium anode rod inspection
4.
Open the drain valve and open a vent to allow the air to
enter the tank (manually opening the relief valve will
usually accomplish this). Use extreme caution, as the
water exiting the tank drain may be very hot. Avoid
contact with the hot discharge water to prevent the risk
of severe scald injury.
5.
Allow the tank to drain completely.
6.
Remove the jacket cover over the manway or hand hole.
Remove the bolt(s) securing the tank access opening.
Use a flashlight to observe the sediment collected in the
tank.
7.
Use hand tools to remove all sediment from the interior
of the tank. Use care not to damage the interior lining of
the storage tank.
8.
Use a water hose to flush the remaining sediment from
the interior surfaces of the tank and ensure that all debris
is removed. Scale or sediment allowed to reach the
potable system can foul valves, pumps, strainers, and
other water fixtures. Ensure that the tank interior is clean
before refilling the vessel.
9.
Install a new gasket on the manway or hand hole to
prevent any possible leaks. Tighten the gasket properly to
prevent leaks.
CAUTION
Glass lined storage tanks have a magnesium anode(s) to
provide cathodical protection of the lining and minimize
corrosion. Aggressive water conditions in some areas of the
country may accelerate the deterioration of the anode(s).
The anode(s) should be periodically removed and inspected
to determine if replacement is necessary.
The tank must be valved off from the system and fully drained
to remove an anode for inspection. Anodes are supplied in
threaded fittings on the top head of small vertical storage
tanks. Top mounted anodes may be accessed by removing
the plastic plugs in the jacket top. Medium sized tanks with
round jackets provide an opening for individual anode rod
access. Large vertical storage tanks and horizontal storage
tanks have multiple anodes installed in threaded tappings
along the length of the tank. These anodes may be accessed
by removing a jacket panel and/or corner post corresponding
to the mounting point of the anodes. Adequate service
clearance is required to allow removal of an anode. Field
insulated tanks should make considerations for access to the
anode rods.
Figure 5-3_Horizontal Storage Tank w/Anodes
T & P RELIEF VALVE
HOT WATER OUTLET
MANWAY
OPTIONAL
Over tightening can result in cutting
the gasket and allowing a water leak to
occur.
ANODE RODS
10. Replace the jacket cover over the manway or hand
hole.
11. Close the drain and open the cold water supply and hot
water outlet. If the relief valve was used for a vent ensure
that it is now closed. Open the closest hot water valve to
allow the air in the tank to vent as water enters the vessel.
Close the valve opened for a vent when water flows from
the valve.
10
DRAIN
COLD WATER INLETS
Service Note:
Replace the anode(s) when more than six (6) inches of the
core wire is exposed at either end of the rod.
Storage Tank Installation and Operation Manual
5
Maintenance
Figure 5-4_Vertical Storage Tank w/Anodes
ANODE RODS
FRONT VIEW
NOTICE
Anode
rods
showing
excessive
decomposition may indicate electrolysis.
An earth ground should be attached to
the vessel to divert stray current and
prevent tank damage.
Water piping and valve replacement
2.
Make certain that the hot water source recirculation
valves and hot water outlet valves have been shut off;
that the tank has been completely drained; that the
pressure has been bled from both the water and energy
source systems; and that all components and surfaces
have cooled.
3.
Carefully break the joint between the unit and the line
or valve to be replaced.
4.
Remove the section of the line or valve to be replaced.
5.
Replace the damaged section of the line or valve.
6.
Reconnect the line or valve to the unit. Follow
recommendations contained in the manufacturer’s
documentation, local codes, or accepted contractor
practices as to the use and /or type of joint compound
or sealer at the connections.
7.
Follow the Startup Procedures on page 7 to place the
unit back on-line. Carefully check all connections for
any sign of leakage.
Temperature / pressure gauge (optional)
replacement
If the temperature / pressure gauge for the water tank is
not functioning correctly and must be replaced, follow the
procedure outlined below.
WARNING
If any of the inlet, outlet, return lines, or shutoff valves are
damaged and must be replaced, follow the steps outlined
in this section.
The combination of electricity and water
can pose a very dangerous situation.
Turn off / disconnect all electric power
before attempting any maintenance
procedure.
1.
Follow Steps 1 through 5 of the Shutdown Procedure on
page 7 to take the unit off-line before attempting to
replace the water temperature / pressure gauge.
2.
Carefully unscrew the water temperature / pressure
gauge from the port in the tank.
Follow Steps 1 through 5 of the Shutdown Procedure on
page 7 to take the hot water source off-line before
attempting to replace damaged lines or shutoff valves.
3.
Install the new gauge into the port in the tank in place of
the old one removed in Step 2. Follow recommendations
contained in the manufacturer’s documentation, local
codes, or accepted contractor practices as to the use of
joint compound or sealer at the connections.
4.
Follow the Startup Procedures on page 7 to place the unit
back on-line. Carefully check all connections for any
sign of leakage.
WARNING
1.
The combination of electricity and water
can pose a very dangerous situation.
Turn off / disconnect all electric power
before attempting any maintenance
procedure.
WARNING
While it might seem feasible to replace
inlet and outlet water lines, and shutoff
valves without shutting down the entire
unit, it is not advised. Unless the unit is
completely shut down, and the water
and the energy source are isolated from
the system, failure of a manual shutoff
valve during the replacement process
could result in serious injury.
11
Revision Notes: Revision A (ECO #C04161) initial
release.
Revision B (ECO C12972) reflects the addition of the
CSA Low Lead logo to the manual cover.
Revision C (ECO C13309) reflects the addition of
FIG. 2-1 on page 5 and a note about saddle location.
LST-I-O Rev C
07/13