Carrier AquaEdge 19XRV Installation Instructions Manual

Also see for AquaEdge 19XRV series: Start-up, operation and maintenance instructions Start-up and service instructions Installation instructions Start-up, operation and maintenance instructions Start-up and service instructions

Contents

64Connect Power Wires to Oil Pump Contacts — See Fig. 42.Connect power wires to oil pump contacts mounted inmachine power panel. Use separate fused disconnect or circuitbreaker as shown on job wiring diagrams and Fig. 42. Checkthat power supply voltage agrees with oil pump voltage. Fol-low correct phasing for proper motor rotation.Connect Power Wires to Oil Heater Contactor — Connectcontrol power wiring between the oil heater contactor termi-nals and terminals LL1 and LL2 on the field wiring strip in thecompressor motor starter. See Fig. 43 and wiring label on themachine power panel.Connect Wiring to VFD — Connect control wiring to theVFD. All control wiring must use shielded cable. Also, con-nect the communications cable. Refer to the job wiring dia-grams for cable type and cable number. Make sure the controlcircuit is grounded in accordance with applicable electricalcodes and instructions on machine control wiring label.CARRIER COMFORT NETWORK® INTERFACE — TheCarrier Comfort Network (CCN) communication bus wiring issupplied and installed by the electrical contractor. It consists ofshielded, 3-conductor cable with drain wire.The system elements are connected to the communicationbus in a daisy chain arrangement. The positive pin of each sys-tem element communication connector must be wired to thepositive pins of the system element on either side of it. Thenegative pins must be wired to the negative pins. The signalground pins must be wired to the signal ground pins. SeeFig. 44 for location of the CCN network connections on the ter-minal strip labeled CCN.NOTE: Conductors and drain wire must be 20 AWG minimumstranded, tinned copper. Individual conductors must be insu-lated with PVC, PVC/nylon, vinyl, Teflon*, or polyethylene.An aluminum/polyester 100% foil shield and an outer jacket ofPVC, PVC/nylon, chrome vinyl, or Teflon with a minimumoperating temperature range of –4 F to 140 F (–20 C to 60 C)is required. See table below for cables that meet the require-ments.When connecting the CCN communication bus to a systemelement, a color code system for the entire network is recom-mended to simplify installation and checkout. The followingcolor code is recommended:If a cable with a different color scheme is selected, a similarcolor code should be adopted for the entire network.At each system element, the shields of its communicationbus cables must be tied together. If the communication bus isentirely within one building, the resulting continuous shieldmust be connected to ground at only one single point. SeeFig. 44. If the communication bus cable exits from one build-ing and enters another, the shields must be connected to groundat the lightening suppressor in each building where the cableenters or exits the building (one point only).To connect the 19XRV chiller to the network, proceed asfollows (see Fig. 44):1. Route wire through knockout in back of control panel.2. Strip back leads.3. Crimp one no. 8 size spring spade terminal on eachconductor.4. Attach red to “+” terminal and white to “G” terminal andblack to “–” terminal of CCN interface located in the con-trol panel.Optional UPC Open Controller Wiring — Theoptional UPC Open controller communicates using BACnet†on an MS/TP network segment communications at 9600 bps,19.2 kbps, 38.4 kbps, or 76.8 kbps.Wire the controllers on an MS/TP network segment in a dai-sy-chain configuration. Wire specifications for the cable are22 AWG or 24 AWG, low-capacitance, twisted, stranded,shielded copper wire. The maximum length is 2000 ft.Install a BT485 terminator on the first and last controller ona network segment to add bias and prevent signal distortionsdue to echoing. See Fig. 45-47.To wire the UPC Open controller to the BAS network:1. Pull the screw terminal connector from the controller'sBAS Port.2. Check the communications wiring for shorts andgrounds.WARNINGVoltage to terminals LL1 and LL2 (of each circuit) comesfrom a control transformer in a starter built to Carrier speci-fications. Do not connect an outside source of controlpower to the compressor motor starter (terminals LL1 andLL2 of each circuit). An outside power source will producedangerous voltage at the line side of the starter becausesupplying voltage at the transformer secondary terminalsproduces input level voltage at the transformer primary ter-minals. Severe injury could result.LEGENDFactory WiringField WiringOil Pump TerminalPower Panel Component TerminalFig. 42 — Oil Pump WiringLEGENDPower Panel Component TerminalFig. 43 — Oil Heater and Control Power Wiringa19-638a19-1696MANUFACTURER CABLE NO.ALPHA 2413 or 5463AMERICAN A22503BELDEN 8772COLUMBIA 02525SIGNAL TYPECCN BUSCONDUCTORINSULATIONCOLORCCN NETWORKINTERFACE(CONTROL PANEL)+ Red +GROUND White G– Black –*Teflon is a registered trademark of Dupont.† BACnet is a registered trademark of ASHRAE (American Societyof Heating, Refrigerating and Air-Conditioning Engineers).