User Guide

HYDRONIC SPECIALTIES TACO 4900 05/08/2008
HYDRONIC SPECIALTIES TACO 4900 15181-4
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.