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Carrier 50BV020-064 a50-7282ef, Field Wiring, Wire Legend, TRANS-1, TRANS-2 CMP 1&2 or CMP 1&3

Models: 50BV020-064

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TRANS-2

L1 L2 L3 GND

	L1
	L2	PHASE
		PHASE
	L3
	BYPASS )
L1		T1

		CURRENT LOOP
	CC1	CLO1	COMPR 1
L1	CC1	T1
L1		T1
L2		T2
L3		T3
		CURRENT LOOP
	CC3	CLO3	COMPR 3
L1	CC3	T1
L1		T1
L2		T2
L3		T3

L1

L3

BRBM

L1 T1

L2 T2

L3 T3

WIRE LEGEND

UNIT WIRING

FIELD WIRING

CBR	PCB1 (J1-3)
CBR
	COMMON TBLK
	TRANS-1
CBR	PCB2 (J1-3)
CBR
	COMMON TBLK

TRANS-2

CMP 1&2 or CMP 1&3

CBR

CMP 1&2 or CMP 1&3

TRANS-3

L2

T2

BR

BM

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L3						T3
1	2	3	GND	4	5	6
R	S	T	E	U	V	W VFD

L1 T1

L2 T2

L3 T3

		CURRENT LOOP
	CC2	CLO2	COMPR2
L1	CC2	T1
L1		T1
L2		T2
L3		T3
		CURRENT LOOP
	CC4	CLO4	COMPR 4
L1	CC4	T1
L1		T1
L2		T2
L3		T3

TRANFORMER PRIMARY LEAD CLR:

208	- RED
240	- ORG

380- PUR OR YEL

460- BLK/RED

575- GRY

CMP 2&4

CBR

CMP 2&4

TRANS-4

a50-7282ef

Fig. 44 — 50BVW,X034-064 Variable Air Volume High Voltage Schematic

Image 61

Carrier 50BV020-064 a50-7282ef, Field Wiring, Wire Legend, TRANS-1, TRANS-2 CMP 1&2 or CMP 1&3, CMP 1&2 or CMP 1&3 TRANS-3

Contents

CONTENTS Installation, Start-Upand Service InstructionsSAFETY CONSIDERATIONS GENERAL MAJOR SYSTEM COMPONENTS Constant Volume CV UnitsStep 1 - Complete Pre-InstallationChecks INSTALLATIONTable 2 - Modular Unit Shipping Table a50-7257efFig. 2 - 50BVC,J,Q020-034Dimensions Fig. 3 - 50BVE,K020-034Dimensions a50-8201 Fig. 4 - 50BVT,V,W034 High-BoyDimensionsFig. 5 - 50BVT,V,W034 Low-BoyDimensions Fig. 6 - 50BVT,V,W044-064 High-BoyDimensions Fig. 7 - 50BVT,V,W044-064 Low-BoyDimensions Fig. 8 - 50BVU,X034 High-BoyDimensions Fig. 9 - 50BVU,X034 Low-BoyDimensions Fig. 10 - 50BVU,X044-064 High-BoyDimensions Fig. 11 - 50BVU,X044-064 Low-BoyDimensions a50-7306ef NOTES 1.Dimensions in inches mma50-7307ef NOTES 1.Dimensions in inches mma50-8235 Shipping Weights lbSize 034 Units Size 044-064Units Table 3A - Physical Data - 50BVC,E,J,K,Q Table 3B - Physical Data - 50BVT,U,V,W,X Multiple Fan Units Fig. 15 - Typical Fan Discharge Connections forFig. 16 - Duct Static Pressure Probe a50-7138efP/N 39EK20462 a50-7267efStep 4 - Make Piping Connections Fig. 19 - DHS Limit Switch P/Na50-8253 Fig. 18 - DHS Pressure Limit Location50BVC,J,Q Units Table 5A - Condenser Pressure DropTable 5B - Condenser Pressure Drop 50BVT,V,W Units50BVC,E,J,K,Q Units Table 6A - Hot Water Pressure DropTable 6B - Hot Water Pressure Drop 50BVT,U,V,W,X UnitsTable 7B - Economizer Pressure Drop Curve Step 5 - Complete Electrical Connectionsft wg, 50BVT,U,V,W,X Units a50-7270efTable 9A - Electrical Data - 50BVC,E,J,K,Q Table 9B - Electrical Data - 50BVT,U,V,W,X a50-7272ef Fig. 24 - Typical Wiring 18 to 30 Ton UnitsTwo-StageCooling Units Table 10 - Recommended Cables a50-7273efa50-7164tf Fig. 26 - Field Terminal BlockFig. 30 - Supply-AirTemperature Sensor Fig. 29 - Supply/Return Air TemperatureInstallation Unit Discharge Location a50-7275efValues for Supply-AirTemperature Sensor Table 11 - Thermistor Resistance vs TemperatureTable 12 - Thermistor Resistance vs Temperature Values for Return-AirTemperature Sensor 5 kiloohmTable 13 - Fan Performance - 50BVC,E,Q020 CV Unit Start-UpTable 14 - Fan Performance - 50BVC,E,Q024 Table 15 - Fan Performance - 50BVC,E,Q028 Table 16 - Fan Performance - 50BVC,E,Q034 Table 17 - Fan Performance - 50BVT,U,V034 Table 17 - Fan Performance - 50BVT,U,V034 cont Table 18 - Fan Performance - 50BVT,U,V044 Table 19 - Fan Performance - 50BVT,U,V054 Table 19 - Fan Performance - 50BVT,U,V054 cont Table 20 - Fan Performance - 50BVT,U,V064 Table 20 - Fan Performance - 50BVT,U,V064 cont VAV Unit Start-Up 02-06-04 OMNIZONE VPACFig. 32 - LID a50-7425efFig. 33 - 50BV VFD Display The LID display will show Year Table 22 - Controller Hardware Points Table 21 - Controller Set PointsTable 23 - Software Points Table 24 - Configuration Parameters Unoccupied space or return air temperature demand MAINTENANCE SERVICEFig. 34 - Gravity Flow Method a50-186tfa50-187tf Fig. 35 - Forced Circulation MethodTROUBLESHOOTING Evaporator Fan Performance AdjustmentCharging the System a50-7135tfPOSSIBLE CAUSE PROBLEMPROBLEM Table 28 - Unit TroubleshootingCORRECTION PROCEDURE POSSIBLE CAUSETable 30 - Forcing an Input or Output Table 29 - CV Units LED Diagnostic CodesTable 31 - Clearing a Forced Input or Output Page Page Page Page UNIT WIRING FIELD WIRINGPage WIRE LEGEND FIELD WIRINGa50-7282ef TRANS-1PCB2 J1 FIELD WIRINGUNIT WIRING FIELD WIRINGPCB1 PCB1 FIELD WIRINGLEGEND AND NOTES FOR FIG Catalog No Copyright 2008 Carrier CorporationForm 50BV-3SI 10-08I. PRELIMINARY INFORMATION START-UPCHECKLISTII. PRE-START-UP CONTROLSIII.START-UP