Carrier AQUAFORCE 30XA080-500 Installation Instructions Manual

Also see for AQUAFORCE 30XA080: Installation instructions Controls, start-up, operation, service and troubleshooting instructions Product data Controls, start-up, operation, service and troubleshooting instructions

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Carrier AQUAFORCE 30XA080-500 Installation Instructions Manual Manual pdf 56 page image

56Step 4 — Fill the Chilled Water Loop.The chilled water pump (if equipped) is rated for 150 psig(1034 kPa) duty. The maximum cooler fluidside pressure is300 psig (2068 kPa). Check the pressure rating for all of thechilled water devices installed. Do not exceed the lowest pres-sure rated device.WATER SYSTEM CLEANING — Proper water systemcleaning is of vital importance. Excessive particulates in thewater system can cause excessive pump seal wear, reduce orstop flow, and cause damage of other components.1. Install a temporary bypass around the chiller to avoidcirculating dirty water and particulates into the pumppackage and chiller during the flush. Use a temporarycirculating pump during the cleaning process. Also, besure that there is capability to fully drain the system aftercleaning. See Fig. 31.2. Be sure to use a cleaning agent that is compatible withall system materials. Be especially careful if the systemcontains any galvanized or aluminum components. Bothdetergent-dispersant and alkaline-dispersant cleaningagents are available.3. It is recommended to fill the system through a water me-ter. This provides a reference point for the future for loopvolume readings, and it also establishes the correct quan-tity of cleaner needed in order to reach the requiredconcentration.4. Use a feeder/transfer pump to mix the solution and fill thesystem. Circulate the cleaning system for the length oftime recommended by the cleaning agent manufacturer.a. After cleaning, drain the cleaning fluid and flush thesystem with fresh water.b. A slight amount of cleaning residue in the system canhelp keep the desired, slightly alkaline, water pH of 8to 9. Avoid a pH greater than 10, since this willadversely affect pump seal components.c. A side stream filter is recommended (see Fig. 32 dur-ing the cleaning process). Filter side flow rate shouldbe enough to filter the entire water volume every 3 to4 hours. Change filters as often as necessary duringthe cleaning process.d. Remove temporary bypass when cleaning is complete.A suction guide with an internal strainer is standard on all30XA units with factory-installed hydronic packages. Thisstrainer allows removal of particulates from the chilledwater loop. Using the combination valve and the field-installedisolation valve at the inlet, the strainer can be isolated from thechilled water loop to be cleaned.The Carrier ComfortLink™ controls provided have a built-in feature to remind building owners or operators to clean thestrainer at a pre-set time interval. Properly installed, cleanedand maintained systems will rarely need the strainer cleanedafter the initial fill. This time interval is user-configurable.Ideally, the chilled water loop will be cleaned before the unitis connected. If the run-in screen is left in the suction guide/strainer, it is recommended that the Service Maintenance be setto alert the operator within 24 hours of start-up to be sure thatthe run-in screen in the suction guide/strainer is removed after24 hours of operation.NOTE: The suction guide/strainer must be removed after thefirst 24 hours of operation.To set the time for the parameter, go to TimeClockMCFGW.FIL in the handheld Navigator™ display.To set the time for the parameter with the Touch Pilot™ dis-play, go to Main MenuServiceMAINTCFGwfilter_c.Values for this item are input in days.WATER TREATMENT — Fill the fluid loop with water (orbrine) and a corrosion-resistant inhibitor suitable for the waterof the area. Consult the local water treatment specialist forcharacteristics of system water and a recommended inhibitorfor the cooler fluid loop.Untreated or improperly treated water may result in corro-sion, scaling, erosion, or algae. The services of a qualified wa-ter treatment specialist should be obtained to develop and mon-itor a treatment program.IMPORTANT: Before starting unit, be sure all of theair has been purged from the system.WARNINGIn low ambient (below 32 F [0° C]) and/or low leavingfluid temperature applications (below 40 F [4.4° C]), a suit-able antifreeze solution of the proper concentration for thespecific operating conditions must be used as the fluid cir-culated through the cooler to prevent freezing and damageto the system. Failure to operate the system with an anti-freeze solution of the proper concentration will void thewarranty should damage result from freezing.CAUTIONWater must be within design flow limits, clean, and treatedto ensure proper chiller performance and reduce the poten-tial of tube damage due to corrosion, scaling, erosion, andalgae. Carrier assumes no responsibility for chiller damageresulting from untreated or improperly treated water.xxDILUTEDCLEANINGAGENTSYSTEMPOT FEEDER ANDTRANSFER PUMP30XA UNITTEMPORARYBYPASSTEMPORARYPUMPTO DRAINFig. 31 — Typical Set Up for Cleaning Processa30-4411xxDILUTEDCLEANINGAGENTSYSTEMSIDESTREAMFILTERPOT FEEDER ANDTRANSFER PUMP30XA UNITTEMPORARYPUMPTEMPORARYBYPASSTO DRAINFig. 32 — Cleaning Using a Side Stream Filtera30-4412