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HYDRONIC SPECIALTIES TACO 4900 05/08/2008
SECTION 15181 - HYDRONIC SPECIALTIES
PART 1 - GENERAL
1.1 SECTION INCLUDES
A. Air and dirt separators
B. Expansion tanks
C. Pump accessories
1.2 RELATED SECTIONS
A. Section - Plumbing Piping Specialties:
B. Section - Hydronic Piping.
1.3 REFERENCES
A. ASME (BPV VIII, 1) - Boiler and Pressure Vessel Code, Section VIII, Division 1 - Rules for
Construction of Pressure Vessels; The American Society of Mechanical Engineers; 2004.
1.4 SUBMITTALS
A. See Section 01300 - Administrative Requirements, for submittal procedures.
B. Product Data: Provide product data for manufactured products and assemblies required for this
project. Include component sizes, rough-in requirements, service sizes, and finishes. Include
product description, model and dimensions.
C. Certificates: Inspection certificates for pressure vessels from authority having jurisdiction.
D. Manufacturer's Installation Instructions: Indicate hanging and support methods, joining
procedures.
E. Project Record Documents: Record actual locations of flow controls.
F. Maintenance Data: Include installation instructions, assembly views, lubrication instructions,
and replacement parts list.
1.5 QUALITY ASSURANCE
A. Manufacturer Qualifications: Company specializing in manufacturing the type of products
specified in this section, with minimum five years of documented experience.
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1.6 DELIVERY, STORAGE, AND HANDLING
A. Accept valves on site in shipping containers with labeling in place. Inspect for damage.
B. Provide temporary end caps and closures on piping and fittings. Maintain in place until
installation.
C. Protect piping components from entry of foreign materials by temporary covers, completing
sections of the work, and isolating parts of completed system.
1.7 MAINTENANCE SERVICE
A. Contractor to furnish service and maintenance for one year from date of substantial completion.
1.8 EXTRA MATERIALS
A. See Section 01400 - Quality Requirements, for additional provisions.
PART 2 - PRODUCTS
2.1 ASME Full Bladder Type EXPANSION TANKS
A. Manufacturers:
1. Taco, Inc; Model CA ______: www.taco-hvac.com
2. ITT Bell & Gossett
3. Amtrol Inc
4. Substitutions: See Section 01600 - Product Requirements.
B. Construction: Welded steel, designed, tested and sta mped in accordance with ASME (BPV co de
sec VIII, div 1); supplied with National Board Form U-1, rated for working pressure of 150 psi ,
with flexible heavy duty butyl rubber bladder. Bladder shall be able to accept the full volume of
the expansion tank and shall be removable and replaceable. Bladder shall be NSF 61 rated for
potable water service and shall be manufactured with FDA approved materials.
C. Accessories: Pressure gage (field installed by others) and air-charging fitting ; precharge to
____ psi.
D. Automatic Cold Water Fill Assembly (field installed by others): Pressure reducing valve,
reduced pressure double check back flow preventer, test cocks, strainer, vacuum breaker, and
valved by-pass.
E. Size:
1. Capacity: ___________HW. _____________CHW (acceptance volume to equal tank
capacity)
2. Capacity of submitted tanks must be equal to or greater than specified units. No
exceptions unless stated in an addendum.
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F. Hot Water Heating System:
1. Select expansion tank pressure relief valve at _____ psi maximum.
2. Set pressure reducing valve at ____ psi .
G. Chilled Water System:
1. Select expansion tank pressure relief valve at _____ psi maximum.
2. Set pressure reducing valve at _____ psi
2.2 AIR and DIRT SEPARATORS
A. Manufacturers:
1. Taco, Inc; 4900 (size and capacity as called for on plans)
2. Spirotherm.
3. Flamco
4. Substitutions: See Section 01600 - Product Requirements.
B. Air and dirt removal device shall be constructed of steel. It shall be designed, fabricated and
stamped per ASME Section VIII Division 1 with a maximum working pressure of 125 psi at
270°F. Manufacturer shall be holder of ASME U stamp. Manufacturer to have optional 250 psi
and 150 psi ASME units available.
Units up to three 3-inch in size shall be provided with threaded connections as standard. Units
C.
four 4-inch and larger shall be provided with flanged system connections as standard. Inlet and
outlet connections to be inline with piping system. Both inlet and outlet to be in the same
horizontal and vertical planes.
D. Each air and dirt removal device shall be equipped with a brass conical shaped air venting
chamber designed to minimize system fluid from fouling the venting assembly. The air vent
shall be able to be closed to allow flushing and purging of dirt via side port without dirt passing
through vent on initial system fill.
E. A brass flushing cock shall be located on the side of each separator to facilitate system fast-fill
and removal of the floating impurities from the air system interface within the separator.
F. A blow down valve shall be provided by the unit manufacturer on the bottom of each unit to
allow blow down and cleaning. On units 2 ½” and smaller the valve and all of its fittings shall
be 1”. On units three 3” and larger the valve and all openings shall be 2”.
G. The air and dirt removal device shall remove air down to 18 microns and shall remove
dirt/debris down to 35 microns. The unit shall be 100% efficient at removing dirt down to 90
microns in 100 passes or less.
H. The unit manufacturer shall provide the owner and design engineer third party independent test
data certifying that their unit performs to the above standards. Suppliers not providing these
independent performance test results will not be acceptable.
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I. The air and dirt separator shall employ the use of high surface area pall rings to achieve optimal
separation of air and dirt with minimal pressure drop. The pall rings shall be made of stainless
steel. Stainless steel will be the only acceptable material used for suppressing turbulence and
increasing surface area for high efficiency air and dirt removal. Inferior materials of
construction such as copper for the straining medium will not be acceptable.
1. Chilled water unit: The minimum allowable surface area of the straining medium shall be
____ sq ft for the ______model.
2. Hot water unit: The minimum allowable surface area of the straining medium shall be
____ sq ft for the ______model.
J. Manufacturer must have at least 15 years of experience with microbubble coalescing and dirt
removal technology.
K. (OPTIONAL) The unit shall be manufactured with a removable cover to facilitate removal,
inspection, and cleaning of the pall ring basket. The entire pall ring basket shall be constructed
of stainless steel. For safety and ease of service the unit shall be accessed from the top and the
pall ring basket shall be accessed as one complete assembly housed in a stainless steel cage.
2.3 PUMP ACCESSORIES
A. Pump discharge multi-purpose valves: All pumps shall be fitted with a discharge multi-purpose
balancing valve or other means of providing system balance, isolation, and check feature for
reverse flow. The valve shall be straight or angle pattern and shall be field convertible between
the two. The valve shall be ductile iron and rated for 250 psi working pressure for all jobs. The
valve flanges shall be matched to suit the working pressure of the piping components on the job;
with either ANSI class 125 flanges or ANSI class 250 Flanges. The valve shall include the
following components; non-slam check valve with spring-loaded bronze disc and seat, stainless
steel stem, and calibrated adjustment permitting flow regulation. Valve shall be serviceable
under full system pressure. The valve shall be a Taco model MPV Plus Two multi-purpose
valve or equivalent.
B. Pump inlet guide fitting: All pump suctions to be fitted with a multifunction inlet suction
diffuser equal to that as manufactured by Taco, Inc. The suction diffuser body and cover plate
shall be ductile iron and be rated for 250 psi for all jobs. The guide flanges shall be matched to
suit the working pressure of the piping components on the job; with either ANSI class 125
flanges or ANSI class 250 flanges. The suction guide shall include the following components;
full length S.S. straightening vanes, permanent S.S. strainer, disposable 16 mesh bronze start up
strainer, blow down ports, and metering ports. For those pumps where an inlet guide fitting is
not installed, there should be five pipe diameters of straight undisturbed flow going into the
pump suction. The fitting shall be a Taco model SD inlet suction elbow or equivalent.
C. EXECUTION
2.4 INSTALLATION
A. Install specialties in accordance with manufacturer's instructions.
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B. Where large air quantities can accumulate, provide enlarged air collection standpipes.
C. Provide manual air vents at system high points and as indicated.
D. For automatic air vents in ceiling spaces or other concealed locations, provide vent tubing to
nearest drain.
E. Air separator and expansion tank to be installed on the suction side of the system pumps.
Expansion tank to be tied into system piping in close proximity to air separator and system fill
line.
F. Provide valved drain and hose connection on strainer blow down connection.
G. Provide pump suction fitting on suction side of base mounted centrifugal pumps where
indicated. Remove temporary strainers after cleaning systems.
H. Provide combination pump discharge valve on discharge side of base mounted centrifugal
pumps where indicated.
I. Support pump fittings with floor mounted pipe and flange supports.
J. Provide radiator valves on water inlet to terminal heating units such as radiation, unit heaters,
and fan coil units.
K. Provide radiator balancing valves on water outlet from terminal heating units such as radiation,
unit heaters, and fan coil units.
L. Provide relief valves on pressure tanks, low pressure side of reducing valves, heat exchangers,
and expansion tanks.
M. Select system relief valve capacity so that it is greater than make-up pressure reducing valve
capacity. Select equipment relief valve capacity to exceed rating of connected equipment.
N. Pipe relief valve outlet to nearest floor drain.
O. Where one line vents several relief valves, make cross sectional area equal to sum of individual
vent areas.
P. Clean and flush glycol system before adding glycol solution. Refer to Section 15185.
Q. Feed glycol solution to system through make-up line with pressure regulator, venting system
high points. Set to fill at ___ psi .
R. Perform tests determining strength of glycol and water solution and submit written test results.
END OF SECTION 15181
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