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50VT-A installation instructions 50VT A, A11006
Models:
50VT-A
1
13
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Troubleshooting
Install
Unit Placement On Common Curb
Maintenance
Start-UpAdjustments
Checklist
Weight
Unit Access Panels
HPS - High Pressure Switch
Page 13
Image 13
50VT
A--
A11006
Fig. 13 - Connection Wiring Schematics -
208/230-3-60
13
Page 12
Page 14
Page 13
Image 13
Page 12
Page 14
Contents
SAFETY CONSIDERATIONS
TABLE OF CONTENTS
Fig. 1 - Unit 50VT-A
Installation Instructions
Installation on older “G” series roof curbs
RECEIVING AND INSTALLATION
INTRODUCTION
Step 1 - Check Equipment
50VT--A
Fig. 2 - 50VT-A24-30Unit Dimensions
A09410
50VT--A
Fig. 3 - 50VT-A36-60Unit Dimensions
A09411
LARGE CURB
Fig. 4 - Roof Curb Dimensions
UNIT PLACEMENT ON COMMON CURB
50VT--A
Step 4 - Rig and Place Unit
Fig. 5 - Rigging Weights
Inspection
Rigging/Lifting of Unit See Fig
CONFIGURING UNITS FOR DOWNFLOW VERTICAL DISCHARGE
Step 5 - Select and Install Ductwork
PERSONAL INJURY HAZARD
Fig. 6 - Supply and Return Duct Opening
High-VoltageConnections
Step 7 - Install Electrical Connections
Step 6 - Provide for Condensate Disposal
Fig. 7 - Unit Leveling Tolerances
Control Voltage Connections
Special Procedures for 208-VOperation
Accessory Electric Heaters Installation
Standard Connections
Table 1 - Physical Data - Unit 50VT-A
Fig. 11 - Typical Installation
INDOOR THERMOSTAT RETURN AIR FROM POWER SOURCE
50VT--A
A11002
50VT--A
A11001
50VT--A
A11006
50VT A
A11005
50VT--A
50VT--A
Fig. 14 - Connection Wiring Diagram
A10195
50VT--A
Fig. 14 Cont. - Ladder Wiring Diagram
START-UP
Step 2 - Start-UpAdjustments
Step 1 - Check for Refrigerant Leaks
Checking Cooling and Heating Control Operation
Indoor Airflow and Airflow Adjustments
Checking and Adjusting Refrigerant Charge
UNIT OPERATION HAZARD
50VT--A
LCS – Loss of Charge Switch
HPS - High Pressure Switch
Continuous Fan Operation
AccuraterMetering De vice
Quiet Shift
Step 3 - Defrost Control
Defrost
Fig. 16 - Interface Fan Board IFB
Unit
50VT--A
Electric Heat Pressure Drop Table in. W.C
Small Cabinet
Large Cabinet
50VT--A
Step 1 - Air Filter
MAINTENANCE
Indoor Blower and Motor
PERSONAL INJURY AND UNIT DAMAGE HAZARD
50VT--A
Fig. 18 - Cooling Charging Table-Subcooling
A09412
Page
Fig. 21 - Unit Access Panels
Step 4 - Electrical Controls and Wiring
Step 3 - Outdoor Fan
Step 5 - Refrigerant Circuit
Step 9 - Loss of Charge Switch
Step 8 - Pressure Switches
Step 10 - High-PressureSwitch
Synthetic Roof Precautionary Procedure
START-UPCHECKLIST
TROUBLESHOOTING
Loss of Charge Switch
Step 13 - System Information
50VT--A
PURONR R-410AQUICK REFERENCE GUIDE
50VT--A
Table 10 - Troubleshooting Chart
I. PRELIMINARY INFORMATION MODEL NO
Remove and Store in Job Files
TEMPERATURES
PRESSURES
Catalog No 50VT---09SI
50VT--A
Edition Date 01/11
Replaces 50VT---08SI