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York YSCU Manual

York YSCU Manual (108 pages)

VERSECON AIR CONDITIONING UNIT

Brand: York | Category: Air Conditioner | Size: 1 MB

Table of Contents

Changeability of this Document
3
Table of Contents
4
List of Tables
8
List of Figures
9
Section 1 - Introduction
11
- About this Manual
  11
- Description of Unit
  11
- Nomenclature
  11
- Table 1 - Acronym Chart
  11
Section 2 - Installation
13
- Approvals
  13
- Limitations
  13
- Unit Inspection
  13
- Table 2 - Voltage Limitations
  13
- Table 3 - Operating Limitations
  13
- Location and Clearances
  14
- Rigging and Unit Handling
  14
- Table 4 - Access Requirements
  14
Fig. 1 - Recommended Service and Maintenance Clearance
14
- Table 5 - Weights
  15
- Factory-Supplied Plenum
  17
- Segmented Unit Assembly
  17
- Vibration Isolators
  17
- Remove Shipping Restraints
  18
Fig. 2 - Shipping Restraint Locations
18
- Table 6 - Data Table
  19
- Table 7 - Chilled Water Coil Performance
  20
- Electrical Data
  24
  - Field Power Wiring
    24
  - Disconnect
    24
  - Electrical Service Sizing
    24
    
    Mca
    24
    
    Mop
    24
  - Field Control Wiring
    25
    
    Pump Start
    25
    
    Table 8 - Fan Motor Data
    25
    
    Fan Start
    26
    
    VAV Box Full Open
    26
- Ducting
  26
  - Supply Air
    26
  - Return Air
    26
    
    Ducted Return
    26
    
    Free Return
    26
- Phase Monitor
  26
- Water Piping
  27
  - General
    27
  - Piping Connections
    27
    
    Waterside Piping Arrangements
    27
  - Condensate Drain Connections
    27
- Static Pressure Transducer Installation (Vav Units Only)
  28
  - Mounting Instructions
    28
    
    Installation Instructions
    29
    
    Mixed Air Sensor
    29
    
    Outdoor Air Sensor
    29
    
    Return Air Sensor
    29
    
    Return, Outdoor, Supply Air, and Mixed Air Sensors
    29
    
    Static Pressure Transducer Installation (Flexsys Units Only)
    29
    
    Supply Air Sensor
    29
    
    Electric Heat
    30
    
    Filters
    30
    
    Hot Water Heat
    30
    
    Hot Water Piping
    30
    
    Specifi Cation
    30
    
    Steam Heat
    30
    
    Steam Piping
    30
  - Section 3 - Start-Up
    31
    
    Pre-Startup Requirements
    31
    
    Table 9 - Setscrew Torques
    31
    
    Initial Start-Up
    32
    
    Unit Checks - Power Applied
    32
  - Section 4 - Maintenance
    33
    
    Fan Bearing Lubrication
    33
    
    Filters
    33
    
    General
    33
    
    Linkages
    33
    
    Motor Bearing Lubrication
    33
    
    Periodic Maintenance - Monthly
    33
    
    Periodic Maintenance - Three to Six Months
    33
    
    Recommended Lubricant for Fan Bearings
    33
    
    Table 10 - Fan Bearing - Lubrication Intervals
    33
    
    Belt Tension
    34
    
    Belts
    34
    
    Entire Unit Inspection
    34
    
    Periodic Maintenance - Yearly
    34
    
    Sheave Alignment
    34
    
    Table 11 - Belt Tension Data
    34
Fig. 3 - Sheave Alignment
34
- Belt Replacement
  35
- Belt Tensioning
  35
- Supply Fan
  35
Fig. 4 - Belt Tensioning Gauge
35
- Fan Motor
  36
- Fan Shaft Bearings
  36
  - Mounting Details
    36
  - Bearing Locking Devices
    37
Section 5 - Sequence of Operation
39
- On / off
  39
- Supply Fan Operation
  39
- Flexsys Dew Point Control
  40
  - Sequence of Operation
    41
- Economizer Operation
  41
  - Outdoor Air Economizer
    41
- Cooling Operation
  42
  - Sequence of Operation
    42
    
    Dew Point Temperature Control (Flessys Units)
    42
    
    Return Air Temperature Control
    42
    
    Supply Air Temperature Control
    42
    
    Coil Leaving Temperature Control (Flexsys Units)
    43
- Flexsys Bypass Damper Control
  43
  - Sequence of Operation
    43
- Heating Operation
  43
  - Sequence of Operation
    44
    
    Return Air Temperature Control
    44
    
    Staged Heat Operation
    44
    
    Supply Air Temperature Control
    44
    
    Table 12 - Window of Operation, Staged Heat
    44
    
    Modulating Heat Operation
    45
    
    Tristate Modulated Heat
    45
Fig. 5 - Keypad / Display
47
- Alarm Screen
  48
- Fault Screen
  48
- I/O Points
  49
  - Analog in
    49
  - Digital in
    49
  - Digital out
    49
  - Analog out
    49
  - PID Loop out
    49
    
    Setpoints
    50
    
    Table 13 - Setpoint Screen Parameters
    51
    
    Daily Schedule
    52
    
    Forced Outputs
    52
    
    Table 14 - Forced on Parameters
    52
    
    Setting Date and Time
    53
    
    Holiday Schedule
    56
    
    Override Schedule
    56
    
    Communication Wiring
    57
    
    Communications
    57
    
    Network Baud Rate
    57
Section 6 - User Interface Control Center
47
- Keypad
  47
- Power up Banner Screen
  47
- Run Status Screen
  47
Fig. 6 - Communication Wiring
57
- Device Object Instance (DE)
  58
Control Board
96
- Dirty Filter (Alarm)
  97
- Duct High Static (Fault / Alarm)
  97
- External Safety
  97
- Fan Failure (Alarm)
  97
- Freeze (Fault / Alarm)
  98
- Control Board Configuration
  99
  - Main Control Board
    99
Fig. 7 - Main Control Board Pin Positions
99
- Auxiliary Control Board
  100
Fig. 8 - Auxiliary Control Board Pin Positions
100
Fig. 9 - Main Control Board
100
Fig. 10 - Auxiliary Control Board
100
Table 22 - Constant Volume / Variable Air Volume Main Control Board
101
Table 23 - Constant Volume / Variable Air Volume Expansion
102
Table 24 - Main Control Board
103
Table 25 - Expansion Control Board
104
Fig. 11 - Wiring Diagram Power Circuit
105
Fig. 12 - Wiring Diagram - Main Control Board
106
Fig. 13 - Wiring Diagram - Expansion Control Board
107

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