Carrier 19XL Installation Instructions Manual

Also see for 19XL series: Start-up, operation and maintenance instructions Start-up, operation and maintenance instructions Advance product data Installation instructions Installation instructions

Contents

Carrier 19XL Installation Instructions Manual Manual pdf 23 page image

Connect Power Wires to Oil Heater Contactor — Connectpower wiring between the oil heater contactor terminals(Fig. 29) and terminals LL1 and LL2 on the field wiring stripin the compressor motor starter. Refer to Fig. 29 and wiringlabel on the chiller power panel.Voltage to terminals LL1 and LL2 comes from a con-trol transformer in a starter built to Carrier specifica-tions. Do not connect an outside source of control powerto the compressor motor starter (terminals LL1 and LL2).An outside power source will produce dangerous volt-age at the line side of the starter, because supplying volt-age at the transformer secondary terminals produces in-put level voltage at the transformer primary terminals.Connect Wiring from Starter to Power Panel — Connect con-trol wiring from main motor starter to the chiller power panel.All control wiring must use shielded cable. Also, connectthe communications cable. Refer to the job wiring diagramsfor cable type and cable number. Make sure the control cir-cuit is grounded in accordance with applicable electrical codesand instructions on machine control wiring label.CARRIER COMFORT NETWORK INTERFACE — TheCarrier Comfort Network (CCN) communication bus wiringis supplied and installed by the electrical contractor. It con-sists of shielded, 3-conductor cable with drain wire.The system elements are connected to the communicationbus in a daisy chain arrangement. The positive pin of eachsystem element communication connector must be wired tothe positive pins of the system element on either side of it.The negative pins must be wired to the negative pins. Thesignal ground pins must be wired to the signal ground pins.See Fig. 22 for location of the CCN network connector(COMM1) on the processor module.NOTE: Conductors and drain wire must be 20 AWG(American Wire Gage) minimum stranded, tinned copper. In-dividual conductors must be insulated with PVC, PVC/nylon, vinyl, Teflon, or polyethylene. An aluminum/polyester100% foil shield and an outer jacket of PVC, PVC/nylon,chrome vinyl, or Teflon with a minimum operating tempera-ture range of −4 F to 140 F (−20 C to 60 C) is required. Seetable below for cables that meet the requirements.MANUFACTURER CABLE NO.Alpha 2413 or 5463American A22503Belden 8772Columbia 02525When connecting the CCN communication bus to a sys-tem element, a color code system for the entire network isrecommended to simplify installation and checkout. The fol-lowing color code is recommended:SIGNAL TYPE CCN BUS CONDUCTORINSULATION COLOR COMM1 PLUGPIN NO.+ Red 1Ground White 2− Black 3If a cable with a different color scheme is selected, a simi-lar color 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 busis entirely within one building, the resulting continuous shieldmust be connected to ground at only one single point. SeeFig. 23. 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 19XL chiller to the network, proceed asfollows (Fig. 23):1. Cut power to the PIC control panel.2. Remove the COMM1 plug from the processor module.3. Cut a CCN wire and strip the ends of the RED, WHITE,and BLACK conductors.4. Using a wirenut, connect the drain wires together.5. Insert and secure the RED wire to Terminal 1 of theCOMM1 plug.6. Insert and secure the WHITE wire to Terminal 2 of theCOMM1 plug.7. Insert and secure the BLACK wire to Terminal 3 of theCOMM1 plug.8. Mount a terminal strip in a convenient location.9. Connect the opposite ends of each conductor to separateterminals on the terminal strip.10. Cut another CCN wire and strip the ends of theconductors.11. Connect the RED wire to the matching location on theterminal strip.12. Connect the WHITE wire to the matching location onthe terminal strip.13. Connect the BLACK wire to the matching location onthe terminal strip.LEGENDFactory WiringField WiringOil Pump TerminalPower Panel Component TerminalFig. 28 — Oil Pump WiringLEGENDField WiringPower Panel Component TerminalNOTE: The voltage selector switch in the chiller power panel is fac-tory set for 115 v control power source. When a 230 v control powersource is used, set the voltage selector switch at 230 v.Fig. 29 — Oil Heater and Control Power Wiring23