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York YSCD manual available for free PDF download: Manual
York YSCD Manual (108 pages)
VERSECON AIR CONDITIONING UNIT
Brand:
York
| Category:
Air Conditioner
| Size: 1.18 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
Constant Volume Fan Operation
39
VAV Fan Operation
40
Communicated VFD Speed Input
40
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
TABLE 15 - Bacnet MS/TP Points
58
Section 7 - Parameter Descriptions and Options
91
Table 16 - Definitions
91
Section 8 - Service
95
Analog Inputs
95
Duct Pressure Transducer
95
Table 17 - Temperature Sensor Resistance
95
Table 18 - Vav Duct Static Pressure Transducer
95
Table 19 - Flexsys Duct Static Pressure Transducer
95
Temperature Sensors
95
Coil Pressure Drop (Flexsys Units Only)
96
Faults and Alarms
96
Humidity Sensor (Flexsys Units Only)
96
Table 20 - Coil Pressure Drop (Flexsys)
96
Table 21 - Humidity Sensor Output
96
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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