SAFETY CONSIDERATIONS
Installation, Start-Upand Service Instructions
CONTENTS
GENERAL
MAJOR SYSTEM COMPONENTS Constant Volume CV Units
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INSTALLATION
Step 1 - Complete Pre-InstallationChecks
Table 2 - Modular Unit Shipping Table
Fig. 2 - 50BVC,J,Q020-034Dimensions
Fig. 3 - 50BVE,K020-034Dimensions
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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
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NOTES 1.Dimensions in inches mm
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NOTES 1.Dimensions in inches mm
Size 034 Units Size 044-064Units
Shipping Weights lb
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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
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Fig. 16 - Duct Static Pressure Probe
P/N 39EK20462
Fig. 18 - DHS Pressure Limit Location
Fig. 19 - DHS Limit Switch P/N
Step 4 - Make Piping Connections
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50BVT,V,W Units
Table 5A - Condenser Pressure Drop
50BVC,J,Q Units
Table 5B - Condenser Pressure Drop
50BVT,U,V,W,X Units
Table 6A - Hot Water Pressure Drop
50BVC,E,J,K,Q Units
Table 6B - Hot Water Pressure Drop
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Step 5 - Complete Electrical Connections
Table 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 Units
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Fig. 26 - Field Terminal Block
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Table 10 - Recommended Cables
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Fig. 29 - Supply/Return Air Temperature
Fig. 30 - Supply-AirTemperature Sensor
Installation Unit Discharge Location
Values for Return-AirTemperature Sensor 5 kiloohm
Table 11 - Thermistor Resistance vs Temperature
Values for Supply-AirTemperature Sensor
Table 12 - Thermistor Resistance vs Temperature
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
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OMNIZONE VPAC
02-06-04
Fig. 32 - LID
Fig. 33 - 50BV VFD Display
The LID display will show Year
Table 23 - Software Points
Table 21 - Controller Set Points
Table 22 - Controller Hardware Points
Table 24 - Configuration Parameters
Unoccupied space or return air temperature demand
MAINTENANCE
SERVICE
Fig. 35 - Forced Circulation Method
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Fig. 34 - Gravity Flow Method
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Evaporator Fan Performance Adjustment
TROUBLESHOOTING
Charging the System
POSSIBLE CAUSE
PROBLEM
POSSIBLE CAUSE
Table 28 - Unit Troubleshooting
PROBLEM
CORRECTION PROCEDURE
Table 31 - Clearing a Forced Input or Output
Table 29 - CV Units LED Diagnostic Codes
Table 30 - Forcing an Input or Output
Page
Page
Page
Page
UNIT WIRING
FIELD WIRING
Page
TRANS-1
FIELD WIRING
WIRE LEGEND
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PCB2 J1
FIELD WIRING
PCB1
FIELD WIRING
UNIT WIRING
PCB1
FIELD WIRING
LEGEND AND NOTES FOR FIG
10-08
Copyright 2008 Carrier Corporation
Catalog No
Form 50BV-3SI
CONTROLS
START-UPCHECKLIST
I. PRELIMINARY INFORMATION
II. PRE-START-UP
III.START-UP
T2
T3
S T E 
U V W VFD
COMMON TBLK