Carrier 50BV020-064 instruction

56

						LEGEND
Standard Components Legend:							Optional Components Legend:
#1				— First Stage			CMFR	— Compressor Malfunction Relay
#2				— Second Stage			CMR	— Compressor Monitor Relay
BM				— Blower Motor			EMS	— Energy Management System Relay
BR				— Blower Relay			FSR	— Freeze/Condensate Sensor Relay
CBR				— 24-vac Circuit Breaker			Freeze/Condensate Sensor Module (includes FSR)
CC				— Compressor Contactor			Condensate Sensor
CCH				— Crankcase Heater (When Supplied)			Freeze Sensor
CPM				— Compressor Protection Module
HPS				— High Pressure Switch
LPS				— Low Pressure Switch
MS				— Motor Starter
RVR				— Reversing Valve Relay (Heat Pumps Only)
RVS				— Reversing Valve Solenoid (Heat Pumps Only)
						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 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.

6.UPM board includes built in 30 to 60-second random start, 5-minute delay on break, 90-second low pres- sure bypass, and 5-second second stage delay.

7.Setting the test mode jumper to yes reduces all time delays to 5 seconds.

Fig. 39 — 50BVT,U,V034 Constant Volume Wiring Schematic

Image 56

Carrier 50BV020-064 specifications

Contents

SAFETY CONSIDERATIONS Installation, Start-Upand Service InstructionsCONTENTS MAJOR SYSTEM COMPONENTS Constant Volume CV Units GENERAL INSTALLATION Step 1 - Complete Pre-InstallationChecksTable 2 - Modular Unit Shipping Table a50-7257ef Fig. 2 - 50BVC,J,Q020-034Dimensions Fig. 3 - 50BVE,K020-034Dimensions Fig. 4 - 50BVT,V,W034 High-BoyDimensions a50-8201 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 NOTES 1.Dimensions in inches mm a50-7306ef NOTES 1.Dimensions in inches mm a50-7307ef 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 Fig. 15 - Typical Fan Discharge Connections for Multiple Fan Units a50-7138ef Fig. 16 - Duct Static Pressure ProbeP/N 39EK20462 a50-7267ef Fig. 19 - DHS Limit Switch P/N Step 4 - Make Piping Connectionsa50-8253 Fig. 18 - DHS Pressure Limit Location Table 5A - Condenser Pressure Drop 50BVC,J,Q UnitsTable 5B - Condenser Pressure Drop 50BVT,V,W Units Table 6A - Hot Water Pressure Drop 50BVC,E,J,K,Q UnitsTable 6B - Hot Water Pressure Drop 50BVT,U,V,W,X Units Step 5 - Complete Electrical Connections Table 7B - Economizer Pressure Drop Curveft 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 Two-StageCooling Units Fig. 24 - Typical Wiring 18 to 30 Ton Unitsa50-7272ef a50-7273ef Table 10 - Recommended Cablesa50-7164tf Fig. 26 - Field Terminal Block Installation Unit Discharge Location a50-7275efFig. 27 - Modular Unit VAV Control Panel a39-1867t START-UP Table 11 - Thermistor Resistance vs TemperatureValues for Supply-AirTemperature Sensor 10 Kilo- ohm CV Unit Start-Up Table 13 - Fan Performance - 50BVC,E,Q020 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 OMNIZONE VPAC 02-06-04Fig. 32 - LID a50-7425ef 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 SERVICE MAINTENANCE a50-186tf Fig. 34 - Gravity Flow Methoda50-187tf Fig. 35 - Forced Circulation Method Evaporator Fan Performance Adjustment TROUBLESHOOTINGCharging the System a50-7135tf PROBLEM POSSIBLE CAUSE Table 28 - Unit Troubleshooting PROBLEMCORRECTION PROCEDURE POSSIBLE CAUSE 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 FIELD WIRING UNIT WIRINGPage FIELD WIRING WIRE LEGENDa50-7282ef TRANS-1 FIELD WIRING PCB2 J1 PCB1 FIELD WIRINGUNIT WIRING FIELD WIRING PCB1 LEGEND AND NOTES FOR FIG Copyright 2008 Carrier Corporation Catalog NoForm 50BV-3SI 10-08 START-UPCHECKLIST I. PRELIMINARY INFORMATIONII. PRE-START-UP CONTROLS III.START-UP