SINCE 1981
Hot Water
Storage
Tanks
Series RLU/RWU/RSE
Operation, Maintenance
& Installation Manual
www.flofab.com
001-iom-2017-hwst
I.O.M - HOT WATER STORAGE TANKS - RLU/RWU/RSE
SINCE 1981
General Notes and Warnings
NOTES:
This manual is intended to detail installation and maintenance procedures for FLOFAB® Tanks. Since
each unit is built to meet customer specications, instructions may seem general in nature at times.
If questions are not answered by this manual, or if specic installation or maintenance procedures
are not clearly understood, contact FLOFAB for clarication before proceeding.
All installation and maintenance procedures should be performed only by experienced, trained, and
certied personnel. Personnel should be trained in correct piping procedures and methods, and
should be experienced in working with steam, boiler water, high temperature water, and high pressure systems.
FLOFAB has no control over the use of FLOFAB® Tanks or the type of system into which they may be
integrated. Depending on the system in which the tank has been installed, the possibility for bodily
injury or death may be present if the system is not properly prepared for maintenance procedures.
If any of the following elements apply to the system, follow all accepted / recommended practices,
and use common sense before attempting any maintenance procedures.
1. Steam
2. High Temperature or Boiler Water
3. Connected Energy Source
4. Connected Power Source
5. Pressurized System
6. Any Combination of the Above
FLOFAB® Tanks are designed for indoor use only, unless otherwise required by design specications.
Each unit requires at least two feet (2’) of clearance around and above the unit. It should be located
on a level surface (no more than one-half degree [½º] of slope), capable of supporting the total
weight of the unit when lled to capacity.
The tank should be mounted to the oor following applicable architectural and local code requirements for the specic installation site.
In areas prone to seismic activity, it is recommended that the tank be mounted to the oor according
to recommended procedures and codes for the site / location, to make it less susceptible to seismic
damage.
Inspection procedures and periodic maintenance, as well as suggested intervals, are detailed on
pages 5 to 8 of this manual.
FLOFAB® Tanks are available in a wide range of operating pressures. For the specic design range for
your tank, refer to the design specications. The maximum rated working pressure is also stamped
on the tank for quick reference.
If the tank is damaged during installation or maintenance, contact FLOFAB for instructions.
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I.O.M - HOT WATER STORAGE TANKS - RLU/RWU/RSE
SINCE 1981
General Notes and Warnings
For all piping connections, the use and / or type of joint compound or sealer should be determined
by referring to local codes, accepted standards, and / or the requirements of the installing contractor.
An A.S.M.E. approved pressure, or pressure / temperature relief valve, rated higher than the
maximum heat in Btu / hr must be installed. The valve should have a pressure setting no higher
than the maximum design pressure of the tank.
Warnings
As with any tank designed for use as a pressure vessel, the potential exists for severe personal injury
if proper installation and maintenance procedures are not followed. Listed below are specic warnings
pertaining to FLOFAB® Tanks. In addition, throughout this manual, warnings are restated when
procedures are described pertaining to areas of potential danger. All warnings should be carefully
read and understood. All precautions contained in the warnings should be carefully followed to re-
duce the chance of injury.
Note: Throughout this manual, warnings will be denoted by the symbol ▼.
In addition, most components which will be connected to the tank by the purchaser, will be accompanied by their own documentation. This documentation may contain warnings specic to the component. It is strongly recommended that each document be reviewed before attempting any installation
or maintenance procedures.
▼ Areas of potential danger:
1. all inlet and outlet lines, joints, and valves;
2. all pressure regulators;
3. all power connections and cables;
4. all energy lines, joints, and valves; and
5. all pneumatic (instrument air) lines and joints.
▼ Before attempting any installation or maintenance procedure:
1. assure that any energy source connected to the system has been turned off;
2. if the unit has been in operation, allow the water in the tank, as well as all components and sur
faces, to cool before starting the procedure;
3. assure that all power has been shut off / disconnected before attempting any procedures; and
4. assure that all inlet and outlet lines have been turned off at the manual shutoff valves.
▼ If the tank will be used for holding hot water, it can present a very dangerous situation due to the
fact it is under pressure and at very high temperatures. To avoid possible injury or death, use
common sense and follow all accepted / recommended procedures when performing installation and
maintenance procedures.
▼ If both electricity and water / steam are to be used in the system, the combination can pose a very
dangerous situation. Assure that all power has been shut off and disconnected before attempting any
installation or maintenance procedures.
2
I.O.M - HOT WATER STORAGE TANKS - RLU/RWU/RSE
SINCE 1981
INSTALLATION
Transporting and Unpacking the Tank
Most FLOFAB® Tanks are not crated at the factory. Larger tanks are shipped with lifting lugs attached
to provide a safe means for lifting and moving the unit.
▼ The tank should only be lifted by the lifting lugs provided. Improper lifting of the tank may result
in damage to the unit.
▼ Care should be taken not to «drop» or damage the tank during transport and unpacking. This
could result in damage to the hydraulic cement lining of the tank.
Location Requirements
FLOFAB® Tanks are designed for indoor use only, and require at least two feet (2’) of clearance
around and above the unit, unless otherwise required by the design specications. The tank should
be located on a level surface (no more than one-half degree [½º] of slope), capable of supporting
the total weight of the tank when lled to capacity.
Examining the Tank
After the tank has been set in place and uncrated (if necessary), it should be carefully examined to
assure that it was not damaged during shipping. If any evidence of damage is detected that could
affect the tank, contact FLOFAB, or your authorized sales representative, to report the damage and
to receive instructions on how to proceed.
Mounting the Tank
The tank should be mounted to the oor, following applicable architectural / local code requirements,
or accepted standards for the specic installation site and for the tank purchased.
In areas prone to seismic activity, it is recommended that the tank be mounted to the oor, according
to recommended procedures for the site, to make it less susceptible to damage from seismic activity.
3
I.O.M - HOT WATER STORAGE TANKS - RLU/RWU/RSE
SINCE 1981
INSTALLATION
Connecting a Pressure Relief Valve
Each FLOFAB® Tank has been built to exact customer specications. An A.S.M.E. approved pressure
or pressure / temperature relief valve must be installed in the tank. While the pressure rating of the
valve can be lower, it must not exceed the working pressure of the tank.
Note: The working pressure of each tank is listed on the Submittal Sheet and stamped on
the data
plate attached to the tank for reference.
▼ Installing a pressure relief valve that is rated for a higher pressure then the working pressure of
the tank will create a potentially dangerous situation. The pressure relief valve must not exceed the
working pressure of the tank and should be installed following all accepted / recommended procedures to avoid possible injury or death.
Note: 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.
Connecting Components to the Tank
Care should be taken when connecting any component(s) to the tank. Each component should be
carefully mounted to the appropriate tting and properly aligned before tightening.
Note: 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.
After the tank is lled, each tting should be examined to assure that no leaks are present. Leakage
at ttings can cause the outside of tank to rust, effectively shortening the life of the tank.
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I.O.M - HOT WATER STORAGE TANKS - RLU/RWU/RSE
SINCE 1981
INSPECTION
Because of the superior design and construction of FLOFAB® Tanks, very little is required in the way
of inspection or maintenance. The following table identies the three (3) inspections that are recommended and their suggested frequency.
Recommended Inspections
Because of the superior design and construction of FLOFAB® Tanks, very little is required in the way
of inspection or maintenance. The following table identies the three (3) inspections that are recommended and their suggested frequency.
Note: Anodes must be changed every year or warranty will be void.
If any problems are detected during inspections, refer to the Maintenance section (page 6) for specic
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I.O.M - HOT WATER STORAGE TANKS - RLU/RWU/RSE
SINCE 1981
MAINTENANCE
The information contained in this section will detail maintenance procedures suggested for all FLOFAB® Tanks. Remember, this manual serves all FLOFAB® Tanks.
Therefore, the maintenance procedures may be general in some instances. If there are any questions
concerning maintenance procedures that are not clearly explained in this manual, contact FLOFAB.
Be sure to have the serial number of the tank available before making contact.
▼ FLOFAB has no control over the use of FLOFAB® Tanks or the type of system into which they
may be integrated. Depending on the system in which the tank has been installed, the possibility
for bodily injury or death may be present if the system is not properly prepared for maintenance
procedures. If any of the following elements apply to the system, follow all accepted / recommended
practices, and use common sense before attempting any maintenance procedure.
1. Steam
2. High Temperature or Boiler Water
3. Connected Energy Source
4. Connected Power Source
5. Pressurized Systems
6. Any Combination of the Above
Removal of Sediment Buildup in the Tank
Each month, it is recommended that the tank be «drained down» to remove any sediment that has
accumulated in the tank. To drain down the tank, follow the steps detailed below.
1. Be sure the drain line is piped to oor drain and that any water from the tank will go into the oor
drain.
If the system is under pressure, relieve the pressure from the tank via the pressure relief valve.
2. After assuring that step 1 has been completed, and any other special circumstances present within
the system have been addressed in an accepted / recommended manner, open the drain valve on
the bottom of the tank.
3. Allow the contents of the tank to drain until no evidence of sediment is present.
4. Close the drain and return it to operation within the system.
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I.O.M - HOT WATER STORAGE TANKS - RLU/RWU/RSE
SINCE 1981
SINCE 1981
MAINTENANCE
Repairing Leaking Fittings
If leaks are detected at any of the ttings in the tank, follow the steps detailed below to correct the
leak.
1. Isolate the tank from the system in which it is installed.
2. If the system is under pressure, relieve the pressure from the tank via the pressure relief valve.
3. If the system operates at a high temperature, allow time for the tank, its contents, and all com-
ponents to cool.
4. After assuring that steps 1 through 3 above, have been completed, and any other special circums-
tances present within the system have been addressed in an accepted / recommended manner, open
the drain valve on the bottom of the tank.
5. Allow the contents of the tank to drain until the uid level is below the level of the leaking tting.
6. Break the joint at the tting.
7. Inspect both the threads of the tting and the pipe for signs of damage. If damage is found, either
rethread or replace the damaged component.
8. If no damage is detected, thoroughly clean the threads of both the tting and pipe.
9. Insert the pipe into the tting and carefully tighten.
Note: 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.
10. Close the drain and rell the tank. As the tank is lling, inspect the tting for any signs of leakage.
11. If no signs of leakage are detected, return the tank to operation within the system. After the
tank has been returned to operation, and the system has had time to return to normal operation,
reinspect the tting for leakage.
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I.O.M - HOT WATER STORAGE TANKS - RLU/RWU/RSE
SINCE 1981
MAINTENANCE
Inspection of the Interior of the Tank and Lining
It is recommend that every three (3) years the interior of the tank and lining be inspected. On larger
FLOFAB® Tanks, a «manhole» is supplied to allow this inspection. To inspect the interior of the tank
and lining, follow the steps detailed below.
1. Isolate the tank from the system in which is installed.
2. If the system is under pressure, relieve the pressure from the tank via the pressure relief valve.
3. If the system operates at a high temperature, allow time for the tank, its contents, and all com-
ponents to cool.
4. After assuring that steps 1 through 3 above, have been completed, and any other special circums-
tances present within the system have been addressed in an accepted / recommended manner, open
the drain valve on the bottom of the tank.
5. Allow the contents of the tank to drain completely.
6. Break the bolts securing the manhole cover to the tank.
Note: Do not allow the manhole to fall into the tank. If the manhole falls into the tank during removal or replacement, the interior and lining of the tank may be damaged.
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completed and on going projects :
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94551
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1075 Grand Héron Boul.,
Saint-Jérôme, QC, CA
J5L 1G2
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25 The West Mall,
Toronto, ON
M9C 1B8
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International Airport,
975 boul. Roméo-Vachon
Dorval, Quebec, H4Y 1H1
Sales and Service :
Quebec, Canada
Tel. : (450) 621-2995
Fax : (450) 621-4995
Toronto, Canada
Tel. : +1 (647) 544-2995
www.flofab.com
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Florida, USA
33467-5749
SERVICE 24/7 : parts@ofab.com
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