Name: Johnson Controls LSWU
Brand: Johnson Controls
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MODEL LSWU/LSWD/LSWF

WITH IPU2 CONTROL

25–105 TON

WATER-COOLED SELF-CONTAINED UNITS

INSTALLATION, OPERATION AND MAINTENANCE

Supersedes 145.05-NOM7 (818) Form 145.05-NOM7 (1019)

035-22910-007

Issue Date:

October 31, 2019

General Safety Guidelines2
Changeability of this Document3
Change Bars3
Associated Literature3
Nomenclature4
Table of Contents5
Section 1 - Introduction10
About this Manual10
Description of Unit10
TABLE 1 - Acronym Chart10
Section 2 - Installation11
Approvals11
Limitations11
Unit Inspection11
TABLE 2 - Voltage Limitations11
TABLE 3 - Operating Limitations11
TABLE 4 - LSWU/LSWD/LSWF Minimum CFM11
Location and Clearances12
FIGURE 1 - Caution Label12
FIGURE 2 - Recommended Service and Maintenance Clearance, Top Discharge (LSW_025-040)12
FIGURE 3 - Recommended Service and Maintenance Clearance, Top Discharge(LSW_050-060)13
FIGURE 4 - Recommended Service and Maintenance Clearance, Top Discharge (LSW_070-105)14
FIGURE 5 - Recommended Service and Maintenance Clearance with Sound Attenuating Plenum15
FIGURE 6 - Recommended Service and Maintenance Clearance with Sound Attenuating Plenum16
FIGURE 7 - Recommended Service and Maintenance Clearance with Airside Economizer (LSW_025-040)17
FIGURE 8 - Recommended Service and Maintenance Clearance, Front Discharge (LSW_070-105)18
FIGURE 9 - Recommended Service and Maintenance Clearance with Sound Attenuating Plenum19
FIGURE 10 - Recommended Service and Maintenance Clearance with Airside Economizer (LSW_050-060)20
FIGURE 11 - Recommended Service and Maintenance Clearance with Airside Economizer (LSW_070-105)21
Rigging and Unit Handling22
FIGURE 12 - Vibration Isolation Pad Locations (LSW_025-040)23
FIGURE 13 - Vibration Isolation Pad Locations (LSW_050-060)24
FIGURE 14 - Vibration Isolation Pad Locations (LSW_070-105)25
FIGURE 15 - Warning Label26
FIGURE 16 - Lifting Recommendations, Coil Section Only (LSW_025-040)27
FIGURE 17 - Lifting Recommendations, Coil Section Only (LSW_050-060)28
FIGURE 18 - Lifting Recommendations, Coil Section Only (LSW_070-105)29
FIGURE 19 - Lifting Recommendations, Fan Section Only (LSW_025-040)30
FIGURE 20 - Lifting Recommendations, Fan Section Only (LSW_050-060)31
FIGURE 21 - Lifting Recommendations, Fan Section Only (LSW_070-105)32
FIGURE 22 - Lifting Recommendations, Fan and Coil Section Combined (LSW_025-040)33
FIGURE 23 - Lifting Recommendations, Fan and Coil Section Combined (LSW_050-060)34
FIGURE 24 - Lifting Recommendations, Fan and Coil Section Combined (LSW_070-105)35
TABLE 5 - Operating Weights (LSW_025-060)36
TABLE 6 - Supply Fan Motor Weights36
Factory-Supplied Plenum37
TABLE 7 - Supply Fan Variable Frequency Drive Weights37
TABLE 8 - Operating Weights (LSW_070-LSW_105)38
Segmented Unit Assembly39
Remove Shipping Restraints39
FIGURE 25 - Shipping Restraint Locations39
Physical Data40
TABLE 9 - Water-Cooled Self-Contained Unit Data (LSW_025-060)41
TABLE 10 - Water-Cooled Self-Contained Unit Data (LSW_070-105)41
TABLE 11 - Electric Heat for LSW_025-06043
Dimensions45
FIGURE 26 - Unit Dimensions, Top Discharge Assembled (LSWU 025-040)45
FIGURE 27 - Unit Dimensions, Top Discharge, Assembled (LSWU 050-060)46
FIGURE 28 - Unit Dimensions, Top Discharge, Assembled (LSWU 070-105)47
FIGURE 29 - Unit Dimensions, Front Discharge, Assembled (LSWF 050-060)48
FIGURE 30 - Unit Dimensions, Top Discharge, Segmented (LSWU_025-040)49
FIGURE 31 - Unit Dimensions, Top Discharge, Segmented (LSWU 050-060)50
FIGURE 32 - Unit Dimensions, Top Discharge, Segmented (LSWU 070-105)51
FIGURE 33 - Unit Dimensions, Front Discharge, Segmented (LSW_050-060)52
FIGURE 34 - Unit Dimensions, Front Discharge, Assembled (LSW_025-040)53
FIGURE 35 - Unit Dimensions, Front Discharge, Segmented (LSW_025-040)54
FIGURE 36 - Unit Dimensions, down Flow, Assembled (LSW_050-060)55
FIGURE 37 - Unit Dimensions, down Flow, Segmented (LSW_050-060)56
FIGURE 38 - Bypass Plenum for down Flow, Segmented (LSW_050-060)57
FIGURE 39 - Unit Dimensions, down Flow, Assembled (LSW_050-060)58
FIGURE 40 - Unit Dimensions, down Flow, Segemented (LSW_025-040)59
FIGURE 41 - Bypass Plenum for down Flow, Segemented (LSW_025-040)60
FIGURE 42 - Unit Dimensions Front Discharge, Assembled (LSWF 070-105)61
FIGURE 43 - Unit Dimensions, Front Discharge, Segmented (LSWF 070-105)62
FIGURE 44 - Half Outlet Plenum Option (LSWU 025-040)63
FIGURE 45 - Half Outlet Plenum Option (LSWU 050-060)64
FIGURE 46 - Full Outlet Plenum Option (LSWU 025-040)65
FIGURE 47 - Full Outlet Plenum Option (LSWU 050-060)66
FIGURE 48 - Unit Dimensions, Discharge Plenum (LSWU 070-105)67
FIGURE 49 - Unit Dimensions Sound Attenuating Plenum Option (LSWU/F 025-040)68
FIGURE 50 - Unit Dimensions Sound Attenuating Plenum Option (LSWU/F 050-060)69
FIGURE 51 - Unit Dimensions All Models, Inlet Plenum (LSWU/F 070-105)70
FIGURE 52 - Unit Dimensions Airside Economizer Option (LSW_025-040)71
FIGURE 53 - Unit Dimensions Airside Economizer Option (LSW_050-060)72
FIGURE 54 - Unit Dimensions Airside Economizer Option (LSW_070-105)73
Electrical Data74
Field Wiring75
Bacnet Communication75
Pump Start Output76
Alarm Contacts76
Isolation Damper Control76
CTB1 Field Control Wiring (Inputs)76
FIGURE 55 - CTB1 Field Control Wiring77
Phase Monitor78
Ducting78
Water Piping78
FIGURE 56 - Condenser Connections79
Static Pressure Transducer Installation (VAV Units Only)81
FIGURE 57 - Condenser Trap81
Static Pressure Transducer Installation (Flexsys ™ Units Only)82
FIGURE 59 - Duct Static Transducer Locations82
FIGURE 58 - Duct Static Transducer Location82
Duct High Pressure Safety Switch83
Dirty Filter Switch83
Static Pressure Transducer Installation (Flexsys ™ Units Only)83
Return, Outdoor, Supply Air, and Mixed Air Sensors84
Steam Heat84
Hot Water Heat85
Electric Heat85
Filters85
Section 3 - Start-Up87
Crankcase Heaters87
Pre-Startup Requirements87
Unit Checks - Power Applied88
Initial Start-Up88
TABLE 12 - Setscrew Torques88
TABLE 13 - R410-A Pressure / Temperature Chart90
Section 4 - Maintenance91
General91
Periodic Maintenance - Monthly91
TABLE 14 - Fan Bearing - Lubrication Intervals91
Periodic Maintenance - Three to Six Months92
Periodic Maintenance - Yearly92
TABLE 15 - Belt Tension Data92
FIGURE 60 - Sheave Alignment93
FIGURE 61 - Belt Tensioning Gauge93
Water Pressure Drop Tables96
TABLE 16 - Condenser Water Pressure Drop (LSW_025-040), Feet of W.C96
TABLE 17 - Condenser Water Pressure Drop (LSW_050-060), Feet of W.C97
TABLE 18 - Condenser Water Pressure Drop (LSW_070-105), Feet of W.C97
TABLE 35 - Condenser97
Determining Water Flow (Condenser Only)98
Determining Water Flow (Waterside Economizer Active)98
Section 5 - Sequence of Operation99
Unit Type99
Constant Volume (CV) Mode Operation99
FIGURE 62 - Constant Volume Setpoint Determination101
TABLE 19 - Active SAT Setpoint Determination, Zone Temperature102
Variable Air Volume (VAV) Mode Operation103
FIGURE 63 - Active DSP Setpoint Vs. Duct Static Pres RST Voltage104
FIGURE 64 - Supply Fan VFD Frequency105
TABLE 20 - Piezometer Airflow Measurements106
FIGURE 65 - Active SAT Setpoint Vs. Supply Air Temp RST Voltage110
FIGURE 66 - Active SAT Setpoint Vs. Outside Air Temp110
FIGURE 67 - Active SAT Setpoint Vs. Supply Fan Speed110
Compressor Control and Sequencing111
FIGURE 68 - Active SAT Setpoint Vs. Return Air Temp111
TABLE 21 - System a Compressor Capacity (25-60 Ton)111
FIGURE 69 - System a Compressor at 1/3 Capacity112
FIGURE 70 - System a Compressor at 2/3 Capacity112
FIGURE 71 - System a Compressor at Full Capacity112
Compressor Operation114
TABLE 22 - Compressor Status Priority Level115
TABLE 23 - Compressor Safeties116
Water Cooled Condenser Operations119
FIGURE 72 - Condenser Only Piping Diagram with no Valves from the Factory119
FIGURE 73 - Condenser and Piping Diagram W/ Condenser Only Valve from the Factory120
FIGURE 74 - Cond Water Valve Vs. Condenser Pressure PI Output121
FIGURE 75 - Condenser Operation and Piping Diagram W/ Condenser and Bypass Valves121
FIGURE 76 - Bypass Valve Position Vs. Cond Water Valve Position122
Waterside or Air Economizer Operation123
FIGURE 77 - Condenser and Water Economizer Valve Operation and Piping Diagram123
FIGURE 78 - Waterside Economizer Actions124
Heat Operations134
Table 24 - Cfm134
TABLE 25 - Heat Stages134
Ventilation System137
Dirty Filter Switch138
Flexsys Operation138
TABLE 26 - Supply Air Density from Temperature and Altitude142
Section 6 - User Interface Control Center143
User Interface Control Center143
FIGURE 79 - User Interface Control Panel143
TABLE 27 - Status145
TABLE 28 - Unit Data146
TABLE 29 - Cooling147
TABLE 30 - Compressor Systems (A-F)148
TABLE 31 - Supply System149
TABLE 32 - Heating150
TABLE 33 - Economizer151
TABLE 34 - Ventilation152
Setpoints153
TABLE 36 - Setpoints153
Program155
TABLE 37 - Program155
Options157
TABLE 38 - Options157
Date / Time158
Schedule158
Operating Hours / Start Counter159
TABLE 39 - Operating Hours / Start Counter159
Printer160
Service161
TABLE 40 - Service161
History167
TABLE 41 - History Key Sequence167
Password168
Power up Banner169
Communication169
FIGURE 80 - IPU Control Board170
FIGURE 81 - MAC Address Switches171
Table 42 - Bacnet Ms/Tp, Modbus, Bacnet Ip172
Section 7 - Parameter Descriptions and Options183
TABLE 43 - Definitions183
Section 8 - Service195
Analog Input Operation195
TABLE 44 - Temperature Sensor Resistance196
TABLE 45 - Duct Pressure Transducer196
TABLE 46 - Pressure Transducers196
TABLE 47 - Humidity Sensor Outputs197
TABLE 48 - Discharge Thermistor Temperature / Resistance197
Digital Compressor Controller Fault Codes198
Faults199
FIGURE 82 - Control Board I/O Locations201
TABLE 49 - Control Board I/O Locations202
TABLE 50 - Warning Description Table205
TABLE 51 - Fault Auto - Reset206
TABLE 52 - Faults Lockout207
Multi Media Card208
TABLE 53 - Data Log Error State209
TABLE 54 - Data Log Error Log Detail209

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