Carrier 50YFV Installation, Operation And Maintenance Instructions

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Carrier 50YFV Installation, Operation And Maintenance Instructions Manual pdf 18 page image

R e s i d e n t i a l D i g i t a l P a c k a g e d U n i t s G T- P B S e r i e s - 6 0 H z P u r o n ®R e v : 4 A p r i l , 1 418Ground Loop Applicationsѥ WARNING! ѥFluid Volume (gal [liters] per 100’ [30 meters) Pipe)Pipe Size Volume (gal) [liters]Copper1” 4.1 [15.3]1.25” 6.4 [23.8]2.5” 9.2 [34.3]Polyethylene3/4” IPS SDR11 2.8 [10.4]1” iPS SDR11 4.5 [16.7]1.25” IPS SDR11 8.0 [29.8]1.5” IPS SDR11 10.9 [40.7]2” IPS SDR11 18.0 [67.0]Unit Heat Exchanger Typical 1.0 [3.8]Flush Cart Tank 10” Dia x 3ft tall[254mm x 91.4cm tall] 10 [37.9]Table 4: Antifreeze Percentages by VolumeTypeMinimum Temperaturefor Low Temperature Protection10°F[-12.2°C]15°F[-9.4°C]20°F[-6.7°C]25°F[-3.9°C]MethanolPropylene GlycolEthanol*21%29%23%17%24%20%13%18%16%8%12%11%* Must not be denatured with any petroleum based productѥ WARNING! ѥѥ CAUTION! ѥWARNING! Always dilute alcohols with water (at least 50%solution) before using. Alcohol fumes are flammable andcan cause serious injury or death if not handled properly.When handling methanol (or any alcohol), always weareye protection and rubber gloves as alcohols are easilyabsorbed through the skin.WARNING! Always use properly marked vehicles (D.O.T.placards), and clean/suitable/properly identified containersfor handling flammable antifreeze mixtures. Post andadvise those on the jobsite of chemical use and potentialdangers of handling and storage.NOTICE: DO NOT use automotive windshield washer fluidas antifreeze. Washer fluid contains chemicals that will causefoaming.CAUTION! Always obtain MSDS safety sheets for allchemicals used in ground loop applications includingchemicals used as antifreeze.Antifreeze Selection - GeneralIn areas where minimum entering loop temperatures dropbelow 40°F [4.4°C] or where piping will be routed throughareas subject to freezing, antifreeze is needed. Alcoholsand glycols are commonly used as antifreeze solutions.Your local representative should be consulted for theantifreeze best suited to your area. Freeze protection shouldbe maintained to 15°F [8.5°C] below the lowest expectedentering loop temperature.Initially calculate the total volume of fluid in the pipingsystem using Table 3. Then use the percentage by volumeshown in Table 4 for the amount of antifreeze. Antifreezeconcentration should be checked from a well mixed sampleusing a hydrometer to measure specific gravity.Contact your distributor if you have any questions as toantifreeze selection.Antifreeze ChargingIt is highly recommended to utilize premixed antifreeze fl uidwhere possible to alleviate many installation problems andextra labor.The following procedure is based upon pure antifreeze andcan be implemented during the Full Flush procedure with threeway valves in the Figure 15d - Valve Position C. If a premixedmixture of 15°F [-9.4°C] freeze protection is used, the systemcan be filled and flushed with the premix directly to preventhandling pure antifreeze during the installation.1) Flush loop until all air has been purged from system andpressurize to check for leaks before addingany antifreeze.2) Run discharge line to a drain and hook up antifreezedrum to suction side of pump (if not adding belowwater level through approved container). Drain flush cartreservoir down to pump suction inlet so reservoir canaccept the volume of antifreeze to be added.3) Calculate the amount of antifreeze required by firstcalculating the total fluid volume of the loop from Table 3.Then calculate the amount of antifreeze needed using Table2 for the appropriate freeze protection level. Many southernapplications require freeze protection because of exposedpiping to ambient conditions.4) Isolate unit and prepare to flush only through loop (seeFigure 15a). Start flush cart, and gradually introduce therequired amount of liquid to the flush cart tank (alwaysintroduce alcohols under water or use suction of pumpto draw in directly to prevent fuming) until attaining theproper antifreeze protection. The rise in flush reservoirlevel indicates amount of antifreeze added (some cartsare marked with measurements in gallons or liters). Aten inch [25.4 cm] diameter cylinder, 3 foot [91.4 cm] tallholds approximately 8 gallons [30.3 liters] of fluid plus thehoses (approx. 2 gallons, [7.6 liters], which equals aboutTable 3: Fluid Volume