Carrier 50TFQ008-012 specifications Typical Unit Wiring Schematic 208/203-3-60 Unit Shown

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C— Contactor, Compressor CAP — Capacitor

CB	—	Circuit Breaker
CLO	—	Compressor Lockout
COMP	—	Compressor Motor
DB	—	Defrost Board
DFT	—	Defrost Thermostat
EQUIP	—	Equipment
FPT	—	Freeze Protection Thermostat
HC	—	Heater Contactor
HPS	—	High-Pressure Switch
HR	—	Heater Relay
IFC	—	Indoor-Fan Contactor
IFM	—	Indoor-Fan Motor
IFMOVL —		Indoor-Fan Motor Overload Switch
LPS	—	Low-Pressure Switch

	LEGEND
LSM	— Limit Switch (Manual Reset)
MCA	— Minimum Circuit Amps
MTR	— Motor
OFC	— Outdoor-Fan Contactor
OFM	— Outdoor-Fan Motor

P— Plug

PL	— Plug Assembly
QT	— Quadruple Terminal
SAT	— Supply Air Thermostat
RVS	— Reversing Valve Solenoid
TRAN	— Transformer
	Field Splice
	Marked Wire

Terminal (Marked)

Terminal (Unmarked)

Terminal Block

Splice

Splice (Marked)

Factory Wiring Field Control Wiring Field Power Wiring Accessory or Optional Wiring

To indicate common potential only, not to represent wiring

Fig. 50 — Typical Unit Wiring Schematic (208/203-3-60 Unit Shown)

51

Image 51

Contents Contents Safety ConsiderationsInstallation Roof Curb Details Unit Leveling Tolerances Rigging Details Unit Size 50TFQ Physical DataBase Unit Dimensions Make Electrical Connections Electrical Data Units Without Electrical Convenience Outlet Electric Heating CapacitiesSIZE† 81/2 Tons Electrical Data Units With Electrical Convenience OutletOFM IFM Heat SIZE† Unit Size Adjust Factory-Installed Options Heat Anticipator Settings 208/230 460 575Stage Outdoor-Air Hood Details PremierLink Controller PremierLink Sensor UsagePremierLink Controller Installed For Differential EconoMi$er IV Component Locations Outdoor-Air Hood Construction EconoMi$er2 with 4 to 20 mA Control Wiring EconoMi$er IV Sensor Usage Supply Air Sensor Temperature Resistance ValuesEconoMi$er IV Controller Potentiometer LED Locations Enthalpy Changeover Set Points Page Uration CO2 Sensor Standard SettingsSize 008 Fan Motor Performance Typical Belt-Drive Motor Mounting for SizeElectric Heater Static Pressure* in. wg 50TFQ008-012 Fan Rpm at Motor Pulley Settings2400 534 630 External Static Pressure in. wgRpm Bhp Watts 2250 511 538 2300 519 5672500 550 698 624 872 Rpm Bhp Watts 2250 511 538 591 697 660 8642300 519 567 597 729 666 900 2400 534 630 611 798 678 974Airflow Rpm Bhp Watts 2550 Rpm Bhp Watts 2550 557 733 631 9103800 3900 4000 4100 4200 42503400 695 1558 756 1790 812 2025 3100 646 1217 711 1428 770 1645 825 18693200 662 1324 726 1542 784 1765 838 1994 3300 679 1438 741 1663 798 1892 851 21263300 597 770 661 929 Rpm Bhp Watts 3000 556 604 623 748 684 8913100 569 656 636 805 3200 583 712 648 8653900 683 1197 739 1385 792 1572 840 1758 3600 639 967 700 1140 754 1312 805 14843700 654 1040 713 1218 767 1395 817 1571 3800 668 1116 726 1299 779 1481 828 16621132 3555 4500 3500 625 898 687 1066 742 1233 794 14003900 683 1197 739 1385 792 1572 4200 726 1462 780 16652500 495 588 581 767 Rpm Bhp Watts 2250 465 459 555 6212300 471 483 560 648 2400 483 534 570 7052500 495 588 581 767 653 948 Rpm Bhp Watts 2250 465 459 555 621 629 7862300 471 483 560 648 634 817 2400 483 534 570 705 644 880Airflow Rpm Bhp Watts 2550 501 617 586 799 658 983 3800 662 17053900 675 1828 Airflow 3300 562 689 626 839 Rpm Bhp Watts 3000 523 541 592 680 657 8253100 536 587 603 730 666 879 3200 549 637 614 783 676 936Airflow General Notes for FAN Performance Data Tables START-UP PRE-START-UPOperating Sequence DX Cooling Temperature Control Example Cleaning Outdoor Coil ServiceLubrication Cooling Charging Chart, 50TFQ009 TroubleshootingPage Typical Unit Wiring Schematic 208/203-3-60 Unit Shown Heating and Cooling Troubleshooting EconoMi$er IV Input/Output Logic Demand Control EnthalpyTerminal† Mounting Compressor Unit IndexPage START-UP Checklist Preliminary InformationIII. START-UP