Field Wiring, Unit Wiring | Carrier 50BV020-064 guide

UNIT WIRING

	L1 L2 L3 GND	CURRENT LOOP		WIRE LEGEND
	L1 L2 L3 GND	CLO1	COMPR 1	UNIT WIRING
	CC1	CLO1	COMPR 1	UNIT WIRING
	L1	T1		FIELD WIRING
				FIELD WIRING

L2 T2

L3 T3

59

L1

L2

L3

L1

L2 PHASE

L3

BYPASS )

T1

T2

T3

1 2 3 GND 4 5 6

R S T E U V W VFD

		CURRENT LOOP
	CC2	CLO2	COMPR2
L1	CC2	T1
L1		T1
L2		T2
L3		T3

L1

L3

BRBM

L1 T1

L2 T2

L3 T3

BRBM

L1 T1

L2 T2

L3 T3

PCB1 (J1-3)

CBR

COMMON TBLK

TRANS-1

PCB2 (J1-3)

CBR

COMMON TBLK

TRANS-2

CMP 1&2

CBR

CMP 1&2

TRANS-3

TRANFORMER PRIMARY LEAD CLR:

208	- RED
240	- ORG

380- PUR OR YEL

460- BLK/RED

575- GRY

Fig. 42 — 50BVJ,K020-034 Variable Air Volume High Voltage Schematic

Image 59

Carrier 50BV020-064 specifications Field Wiring, Unit Wiring

Contents

SAFETY CONSIDERATIONS Installation, Start-Upand Service InstructionsCONTENTS GENERAL MAJOR SYSTEM COMPONENTS Constant Volume CV Units a50-7257ef INSTALLATIONStep 1 - Complete Pre-InstallationChecks Table 2 - Modular Unit Shipping Table Fig. 2 - 50BVC,J,Q020-034Dimensions Fig. 3 - 50BVE,K020-034Dimensions a50-8201 Fig. 4 - 50BVT,V,W034 High-BoyDimensions Fig. 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 mm a50-7307ef NOTES 1.Dimensions in inches mm Size 034 Units Size 044-064Units Shipping Weights lba50-8235 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 for a50-7267ef a50-7138efFig. 16 - Duct Static Pressure Probe P/N 39EK20462 Fig. 18 - DHS Pressure Limit Location Fig. 19 - DHS Limit Switch P/NStep 4 - Make Piping Connections a50-8253 50BVT,V,W Units Table 5A - Condenser Pressure Drop50BVC,J,Q Units Table 5B - Condenser Pressure Drop 50BVT,U,V,W,X Units Table 6A - Hot Water Pressure Drop50BVC,E,J,K,Q Units Table 6B - Hot Water Pressure Drop a50-7270ef Step 5 - Complete Electrical ConnectionsTable 7B - Economizer Pressure Drop Curve ft wg, 50BVT,U,V,W,X Units Table 9A - Electrical Data - 50BVC,E,J,K,Q Table 9B - Electrical Data - 50BVT,U,V,W,X Two-StageCooling Units Fig. 24 - Typical Wiring 18 to 30 Ton Unitsa50-7272ef Fig. 26 - Field Terminal Block a50-7273efTable 10 - Recommended Cables a50-7164tf a39-1867t Installation Unit Discharge Locationa50-7275ef Fig. 27 - Modular Unit VAV Control Panel 10 Kilo- ohm START-UPTable 11 - Thermistor Resistance vs Temperature Values for Supply-AirTemperature Sensor Table 13 - Fan Performance - 50BVC,E,Q020 CV Unit Start-Up Table 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 a50-7425ef OMNIZONE VPAC02-06-04 Fig. 32 - LID Fig. 33 - 50BV VFD Display The LID display will show Year Table 23 - Software Points Table 21 - Controller Set PointsTable 22 - Controller Hardware Points Table 24 - Configuration Parameters Unoccupied space or return air temperature demand MAINTENANCE SERVICE Fig. 35 - Forced Circulation Method a50-186tfFig. 34 - Gravity Flow Method a50-187tf a50-7135tf Evaporator Fan Performance AdjustmentTROUBLESHOOTING Charging the System POSSIBLE CAUSE PROBLEM POSSIBLE CAUSE Table 28 - Unit TroubleshootingPROBLEM CORRECTION PROCEDURE Table 31 - Clearing a Forced Input or Output Table 29 - CV Units LED Diagnostic CodesTable 30 - Forcing an Input or Output Page Page Page Page UNIT WIRING FIELD WIRINGPage TRANS-1 FIELD WIRINGWIRE LEGEND a50-7282ef PCB2 J1 FIELD WIRING PCB1 FIELD WIRINGUNIT WIRING PCB1 FIELD WIRING LEGEND AND NOTES FOR FIG 10-08 Copyright 2008 Carrier CorporationCatalog No Form 50BV-3SI CONTROLS START-UPCHECKLISTI. PRELIMINARY INFORMATION II. PRE-START-UP III.START-UP