Carrier 50BV020-064 specification

LEGEND

						LEGEND
Standard Components Legend:
BM				— Blower Motor
BR				— Blower Relay
CBR				— 24-v Circuit Breaker
CC				— Compressor Contactor
CCH				— Crankcase Heater (When Supplied)
CPM				— Compressor Protection Module (Except MA480)
HPS				— High Pressure Switch (380 psig)
LPS				— Low Pressure Switch (20 psig)
MS				— Motor Starter
RVR				— Reversing Valve Relay (Heat Pumps Only)
RVS				— Reversing Valve Solenoid (Heat Pumps Only)
Optional Components Legend:
BMR				— Blower Motor Relay
CMFR				— Compressor Malfunction Relay
CMR				— Compressor Monitor Relay
EMS				— Energy Management System Relay
						Factory Wire

						Field Wire
NOTES:

1.			See unit nameplate for electrical rating.
2.			All field wiring must be in accordance with NEC-NFPA #70.
3.			208/230-v units are factory wired for 230-v operation. For 208-v operation, remove ORG
			lead and replace it with RED lead. Cap all unused leads.
4.			Check phase rotation on all scroll compressor units. Reverse rotation will damage the
			compressor and void unit warranty.
5.			For alternative EMS coil voltages, consult factory.

57

Fig. 40 — 50BVT,U,V044-064 Constant Volume Wiring Schematic

Image 57

Carrier 50BV020-064 specifications

Contents

Installation, Start-Upand Service Instructions CONTENTSSAFETY CONSIDERATIONS GENERAL MAJOR SYSTEM COMPONENTS Constant Volume CV Units Step 1 - Complete Pre-InstallationChecks INSTALLATIONTable 2 - Modular Unit Shipping Table a50-7257ef 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 Shipping Weights lb a50-8235Size 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 for Fig. 16 - Duct Static Pressure Probe a50-7138efP/N 39EK20462 a50-7267ef Step 4 - Make Piping Connections Fig. 19 - DHS Limit Switch P/Na50-8253 Fig. 18 - DHS Pressure Limit Location 50BVC,J,Q Units Table 5A - Condenser Pressure DropTable 5B - Condenser Pressure Drop 50BVT,V,W Units 50BVC,E,J,K,Q Units Table 6A - Hot Water Pressure DropTable 6B - Hot Water Pressure Drop 50BVT,U,V,W,X Units Table 7B - Economizer Pressure Drop Curve Step 5 - Complete Electrical Connectionsft wg, 50BVT,U,V,W,X Units a50-7270ef Table 9A - Electrical Data - 50BVC,E,J,K,Q Table 9B - Electrical Data - 50BVT,U,V,W,X Fig. 24 - Typical Wiring 18 to 30 Ton Units a50-7272efTwo-StageCooling Units Table 10 - Recommended Cables a50-7273efa50-7164tf Fig. 26 - Field Terminal Block a50-7275ef Installation Unit Discharge LocationFig. 27 - Modular Unit VAV Control Panel a39-1867t Table 11 - Thermistor Resistance vs Temperature START-UPValues for Supply-AirTemperature Sensor 10 Kilo- ohm 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 02-06-04 OMNIZONE VPACFig. 32 - LID a50-7425ef Fig. 33 - 50BV VFD Display The LID display will show Year Table 21 - Controller Set Points Table 22 - Controller Hardware PointsTable 23 - Software Points Table 24 - Configuration Parameters Unoccupied space or return air temperature demand MAINTENANCE SERVICE Fig. 34 - Gravity Flow Method a50-186tfa50-187tf Fig. 35 - Forced Circulation Method TROUBLESHOOTING Evaporator Fan Performance AdjustmentCharging the System a50-7135tf POSSIBLE CAUSE PROBLEM PROBLEM Table 28 - Unit TroubleshootingCORRECTION PROCEDURE POSSIBLE CAUSE Table 29 - CV Units LED Diagnostic Codes Table 30 - Forcing an Input or OutputTable 31 - Clearing a Forced Input or Output Page Page Page Page UNIT WIRING FIELD WIRINGPage WIRE LEGEND FIELD WIRINGa50-7282ef TRANS-1 PCB2 J1 FIELD WIRING FIELD WIRING UNIT WIRINGPCB1 PCB1 FIELD WIRING LEGEND AND NOTES FOR FIG Catalog No Copyright 2008 Carrier CorporationForm 50BV-3SI 10-08 I. PRELIMINARY INFORMATION START-UPCHECKLISTII. PRE-START-UP CONTROLS III.START-UP