User Guide

HYDRONIC SPECIALTIES TACO 4900 05/08/2008
HYDRONIC SPECIALTIES TACO 4900 15181-3
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.
C.
Units up to three 3-inch in size shall be provided with threaded connections as standard. Units
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.