Closed Loop Hot/Chilled Water Specificationspirotherm Or Equal
®
CLOSED LOOP HOT/CHILLED WATER SPECIFICATIONSPIROTHERM OR EQUAL
Air Eliminator and Dirt Separator
Furnish and install as shown on the drawings the specified Spirotherm coalescing air eliminator and dirt separator. The pipe size shall not be a factor in selection and all units should be selected at the point of peak efficiency per the manufacturer’s recommendations. Separator shall be fabricated steel, rated for 150 psig working pressure, stamped and registered in accordance with ASME Section VIII, Division 1 for unfired pressure vessels, and include two equal chambers above and below the inlet / outlet nozzles. The entering velocities may not exceed 4 feet per second at specified flow on standard velocity units, nor 10 feet per second at on high velocity units.
The vessel diameter and height above and belowthe nozzles are critical design elements and shall be the same as per the basis of design. Unit shall include internal Spirotube® elements filling the entire vessel with no open space or voids between them to suppress turbulence and provide high efficiency. The internal bundle shall fill the entire vessel to suppress turbulence and provide high efficiency. The bundle shall consist of a copper core tube with continuous wound copper medium permanently affixed to the core. Loosely filled steel pall rings, wire mesh or perforated screens will not be accepted. Each eliminator shall have a separate venting chamber to prevent system contaminants from harming the float and venting valve operation. At the top of the venting chamber shall be an integral full port float actuated brass venting mechanism. Units shall include a valved side tap to flush floating dirt or liquids and for quick bleeding of large amounts of air during system fill or refill.
Coalescing air / dirt combination separators shall be supported by testingfrom an independent facility. Testing shall be such that end results are shown from anormal saturated fluid condition and not a super-saturatedstate affected by adjustments to temperature or pressure. Beginning pressure shall remain constant throughout the whole range of the test and shall not be lowered. Beginning temperature shall remain constant throughout the whole range of the test and shall not be raised. Tests for air removal shall continue until the dissolved air is to a level of 4ml of air to 1 liter of water. Tests for dirt separation shall continue until a minimum of 80% of all particles 30 microns and larger removed within 100 passes at no less than 3.5 feet per secondvelocity.
Optional: Separator shall include a removable bottom or top bolted head to facilitate removal of Spirotube assembly for inspection or cleaning. (Specify Bottom or Top, depending upon Access for Removal) (also see: )
Spirotherm is the only acceptable manufacturer of a coalescing style air eliminator and dirt separator. Air Eliminator and Dirt Separator shall be a Spirovent® as manufactured by Spirotherm, Inc., Glendale Heights, Illinois or approved alternate as noted below*.
*ADD FOR AIR/DIRT UNIT
Furnish and install full flow dirt separator with each air separator. Separator shall remove not less than 80% of all particles 30 micron and larger within 100 passes. Approved supplier, Lakos Full Flow separator Model HTX or equal.
*ALTERNATES to Spirotherm
Furnish and install centrifugal type air separator(s) and appropriate reducers to connect to the piping as shown on drawings. Separator(s) shall be fabricated steel, rated for 150 psig ASME design pressure and each be selected at the point of peak efficiency of at least 98.5% entrained air removal in accordance with manufacturer’s published catalog data. Entering velocity at the pipe connections shall not exceed 2 feet per second at specified GPM. The centrifugal separator shall have a 3:1 vessel diameter to pipe connection ratio to reduce velocity. Approved supplier Bell & Gossett or equal.
Installer to furnish schematic detail of installation location, piping and controls required if alternates are submitted.