Daikin Pathfinder AWV Series Installation, Operation And Maintenance Manual

Daikin Pathfinder AWV Series Installation, Operation And Maintenance Manual Manual pdf 26 page image

IOM 1242-2 • PATHFINDER® MODEL AWV CHILLERS 26 www.DaikinApplied.comInsTallaTIon and applICaTIon ConsIderaTIons - remoTe evaporaTorsTable 4: Fitting Losses Equivalent Feet of PipeSOURCE: ASHRAE 2014 Handbook RefrigerationNOTE: TEL values for the filter-drier and solenoid valve are alreadyincluded and should not be added to the liquid line drop.Remote Evaporator Field Wiring Notes:1. The 110V liquid line solenoid valves (LSV) have tobe wired back to the outdoor unit. All the conduit andwiring is to be field supplied (14 gauge, red and whitewires, 3/8” conduit with straight and 90 degree fittings).If additional length is required, use 14 gauge wire up toa maximum of an additional 100 feet. A din connectoris supplied with refrigerant specialties kits. Field to wiredirectly into compressor terminal box terminal block:• Compressor #1: (LSV-1) wire 740-1A (red) wiresinto compressor #1 terminal box terminal block atTB1-2-9. Wire 740-1B (white) wires to TB1-2-10.• Compressor #2: (LSV-2) wire 740-2A (red) wiresinto compressor #2 terminal box terminal block atTB2-2-9. Wire 740-2B (white) wires to TB2-2-10.2. Two evaporator water temperature sensors with 100feet of cable coiled up and attached to the unit basefor extension to the evaporator and insertion in fittingslocated on the side of the inlet and outlet nozzles.3. One suction line refrigerant temperature sensor percircuit with 100 feet of cable coiled up and attached tothe unit base for extension to the evaporator.4. One suction line pressure transducer per circuit with 100feet of cable coiled up and attached to the unit base forextension to the evaporator.5. The electronic expansion valve has a 30 foot long cableattached and can be used when the outdoor unit is lessthan 30 feet away. Beyond that, a junction box must belocated within 30 feet of the evaporator, and up to 170additional feet of 14GA wire connected from the cableto the unit, allowing up to a total distance of 100 feet.When splicing is required, the connections must besoldered together and individually shrink-wrapped to bemade water resistant. The expansion valve wiring cannotrun in conduit with other wiring that is over 24 VoltsAC. Shielding must cover the wiring from the unit to theelectronic expansion valve (EXV), including the spliceconnection. NOTE: 14 AWG Wire Gauge sizes will useBeldon part number 83754 or equivalent for a distanceup to 250 feet. For distances greater than 250 feet, 12AWG wire is recommended (Beldon part number 83804or equivalent).6. A flow switch must be installed in the leaving chilledwater line per manufacturer’s instructions and wired toterminals 8 and 23 on terminal block M5 in the chillercontrol panel. See Unit Field Wiring Diagrams - Figure 27and Figure 28.7. Do not reduce the wire lengths of factory wiring.Piping LayoutFigure 33 shows the piping layout for one of the two refrigerantcircuits for AWV units with a remote evaporator without theoptional economizer circuit. The outdoor unit, the evaporator,and a kit of refrigerant components are shipped as separatepieces for field mounting, wiring, and piping. The suctionshutoff valve is standard on remote evaporator units.Note: Field insulation of the suction lines and the liquid line oncircuits with economizers is required. The outdoor unit will havea refrigerant charge equal to that of a packaged unit pumpeddown into the condenser. Any additional charge of refrigerantand oil required by the field piping is supplied by the customer.The location and size of the refrigerant connections are shownon dimensional drawings available from a Daikin Applied salesrepresentative.Figure 32: Remote EXV Field WiringLine SizeInches ODAngleValveGlobeValve90-DegreeStd RadiusElbow90-DegreeLong RadiusElbow2 5/8 29.0 69.0 6.0 4.13 1/8 35.0 84.0 7.5 5.03 5/8 41.0 100.0 9.0 5.94 1/8 47.0 120.0 10.0 6.75 1/8 58.0 140.0 13.0 8.26 1/8 70.0 170.0 16.0 10.0