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50VT-A installation instructions Connection Wiring Diagram, 50VT--A, A10195
Models:
50VT-A
1
15
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Troubleshooting
Install
Connection Wiring Diagram
Unit Placement On Common Curb
Dimension
Maintenance
Configuring Units For Downflow Vertical Discharge
Electrical Controls and Wiring
Special Procedures for 208-VOperation
Start-UpAdjustments
Page 15
Image 15
50VT--
A
A10195
Fig. 14 - Connection Wiring Diagram
460-3-60
15
Page 14
Page 16
Page 15
Image 15
Page 14
Page 16
Contents
Installation Instructions
TABLE OF CONTENTS
SAFETY CONSIDERATIONS
Fig. 1 - Unit 50VT-A
Step 1 - Check Equipment
RECEIVING AND INSTALLATION
Installation on older “G” series roof curbs
INTRODUCTION
Fig. 2 - 50VT-A24-30Unit Dimensions
50VT--A
A09410
Fig. 3 - 50VT-A36-60Unit Dimensions
50VT--A
A09411
50VT--A
Fig. 4 - Roof Curb Dimensions
LARGE CURB
UNIT PLACEMENT ON COMMON CURB
Rigging/Lifting of Unit See Fig
Fig. 5 - Rigging Weights
Step 4 - Rig and Place Unit
Inspection
Fig. 6 - Supply and Return Duct Opening
Step 5 - Select and Install Ductwork
CONFIGURING UNITS FOR DOWNFLOW VERTICAL DISCHARGE
PERSONAL INJURY HAZARD
Fig. 7 - Unit Leveling Tolerances
Step 7 - Install Electrical Connections
High-VoltageConnections
Step 6 - Provide for Condensate Disposal
Standard Connections
Special Procedures for 208-VOperation
Control Voltage Connections
Accessory Electric Heaters Installation
50VT--A
Fig. 11 - Typical Installation
Table 1 - Physical Data - Unit 50VT-A
INDOOR THERMOSTAT RETURN AIR FROM POWER SOURCE
A11002
50VT--A
A11001
50VT--A
A11006
50VT A
A11005
50VT--A
Fig. 14 - Connection Wiring Diagram
50VT--A
A10195
50VT--A
Fig. 14 Cont. - Ladder Wiring Diagram
Checking Cooling and Heating Control Operation
Step 2 - Start-UpAdjustments
START-UP
Step 1 - Check for Refrigerant Leaks
50VT--A
Checking and Adjusting Refrigerant Charge
Indoor Airflow and Airflow Adjustments
UNIT OPERATION HAZARD
AccuraterMetering De vice
HPS - High Pressure Switch
LCS – Loss of Charge Switch
Continuous Fan Operation
Fig. 16 - Interface Fan Board IFB
Step 3 - Defrost Control
Quiet Shift
Defrost
Unit
50VT--A
50VT--A
Small Cabinet
Electric Heat Pressure Drop Table in. W.C
Large Cabinet
PERSONAL INJURY AND UNIT DAMAGE HAZARD
MAINTENANCE
Step 1 - Air Filter
Indoor Blower and Motor
Fig. 18 - Cooling Charging Table-Subcooling
50VT--A
A09412
Page
Step 5 - Refrigerant Circuit
Step 4 - Electrical Controls and Wiring
Fig. 21 - Unit Access Panels
Step 3 - Outdoor Fan
Synthetic Roof Precautionary Procedure
Step 8 - Pressure Switches
Step 9 - Loss of Charge Switch
Step 10 - High-PressureSwitch
Step 13 - System Information
TROUBLESHOOTING
START-UPCHECKLIST
Loss of Charge Switch
50VT--A
PURONR R-410AQUICK REFERENCE GUIDE
50VT--A
Table 10 - Troubleshooting Chart
PRESSURES
TEMPERATURES
Remove and Store in Job Files
I. PRELIMINARY INFORMATION MODEL NO
Replaces 50VT---08SI
50VT--A
Catalog No 50VT---09SI
Edition Date 01/11