Emerson Liebert ICOM-DO User Manual Page 58
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Operation
Liebert
®
iCOM
®
for Liebert DSE
™
50
Figure 40 CANbus connections
3.8.1 CANbus Failure
The Liebert iCOM will keep the cooling system operating despite the loss of CANbus communication
between the Liebert DSE, the Liebert EconoPhase and/or the condenser. The Liebert DSE will
operate in DX mode, using its own sensors to maintain room conditions. The Liebert MC will operate
as a stand-alone unit, maintaining refrigerant pressure and temperature based on its own sensors.
The Liebert EconoPhase will remain idle with all diverting valves in DX mode.
3.8.2 Liebert DSE with Optional Liebert EconoPhase
The Liebert DSE can be equipped with an optional pumped refrigerant Liebert EconoPhase to reduce
power used for cooling when the outside air is cool enough. All components that help to drive its
efficiency are automatically controlled with the Liebert iCOM and do not need to be adjusted in the field.
3.8.3 Electronic Expansion Valve (EEV)
The Liebert DSE controls superheat with an electronic expansion valve (EEV). The EEV controller
adjusts the orifice based on suction pressure and temperature. The EEV control will drive the valve to
maintain the superheat setpoint, set in the Liebert iCOM, using a Proportional, Integral, Derivative
(PID) routine. The PID control values are set at the factory for most applications. These default PID
values will allow stable superheat control of the unit.
For DA080/085, the default PID values must be updated to special PID values when the condenser is
installed at the same level as the evaporator, plus or minus 10 feet (3m). The PID control values (both
default and special) are noted Table 10.
Table 10 EEV control values, default and special settings
Model #
EEV Settings
Default Values
Special Values
(condenser and evaporator
at same level ±10' [3m])
DA080/085
E144 = MAN E144 = MAN
E160 = 0.7 E160 = 1.5
E161 = 250 E161 = 250
E162 = 4.2 E162 = 2.5
DA125/150
E144 = MAN
E160 = 1.8
E161 = 250
E162 = 2.5
TB49
Indoor Unit With
Liebert iCOM
Factory-Installed CANbus Cable
Field-Installed CANbus Cable
J6
1
3
J6
1
3
J6
1
3
J6
1
3
12345678
CAN
On
12345678
CAN
On
12345678
CAN
On
12345678
CAN
On
TB50
TB49
Liebert
EconoPhase
Circuit 1
TB50
Liebert
EconoPhase
Circuit 2
TB50
Liebert
MC Unit
Circuit 2
TB50
TB49
Liebert
EconoPhase
CANbus Terminal Block
TB49
TB49
TB50
TB49
Liebert
MC Unit
Circuit 1
- for Liebert DSE 1
- 2
- TABLE OF CONTENTS 3
- 1.0 INTRODUCTION 9
- 2.1.1 System Screen 12
- 5Liebert 13
- Unit Screen 14
- EconoPhase circuit 16
- 2.2.1 Control Interface 17
- 2.2.2 Accessing Submenus 17
- Display Filtering 18
- Liebert iCOM Display Readout 18
- Accessing Submenus 19
- 2.2.3 Entering a Password 20
- Table 3 User menu icons 23
- Table 4 Service menu icons 25
- 3.0 OPERATION 27
- Autorestart 28
- Loss of Power Alarm 28
- Minimum Fan Speed 30
- 3.1.2 Back-Draft Fan Damper 30
- Low-Pressure Time Delay 31
- Advanced DX Freeze Protection 31
- Pump Down Operation 31
- High Pressure Alarm 32
- Operation 33
- 25 Liebert 33
- 3.2 Temperature Control 34
- . If the proportional 35
- 3.2.1 Setting Up PI Control 36
- Temperature Deadband 36
- 3.2.2 Compressor Control 36
- 29 Liebert 37
- System 1 System 2 38
- 3.3.3 Tandem Operation 39
- Additional Reheat Rules 40
- 3.5 Humidity Control 41
- 3.5.1 Humidity Control Types 42
- 3.5.2 Humidification 43
- Infrared Humidifier 43
- 3.5.3 Dehumidification 44
- Dehumidification Low Limit 45
- 39 Liebert 47
- Dehumidification Operation 48
- 41 Liebert 49
- 43 Liebert 51
- Temperature Compensation 52
- Setpoint Manipulated Variable 56
- Controlled Variable 56
- and Liebert 57
- 3.8.1 CANbus Failure 58
- EEV Battery Backup 59
- 3.8.4 Liebert MC 59
- Low Noise / Fan Reversal 60
- 3.8.6 Liebert EconoPhase 61
- 57 Liebert 65
- Event Description 68
- 3.9.2 User Inputs 70
- Table 16 Customer inputs 71
- 3.9.3 Analog Inputs 72
- 3.9.4 Liebert iCOM-DO 73
- Table 20 Event notifications 74
- Calculating Unit Wellness 76
- 69 Liebert 77
- 4.0 TEAMWORK 78
- 4.2.2 No Teamwork 79
- 4.2.3 Teamwork Mode 2 79
- Fixed Speed 80
- Variable Speed 80
- Teamwork 81
- 73 Liebert 81
- Figure 49 Remote sensors 82
- Figure 50 Sensor positioning 82
- 4.2.5 Hardware Setup 83
- 4.3.2 DIP Switch Settings 84
- Unterminated 86
- Terminated 86
- Grounded CANbus Cable 87
- 4.3.7 Software Setup 89
- 4.3.8 Standby—Rotation 90
- Standby and Cascade 90
- Liebert iCOM 95
- I/O Board 95
- Optional Large 95
- Graphics Display 95
- (Rear View) 95
- Liebert vNSA 96
- SITESCAN 97
- 7.0 USER MENU PARAMETERS 98
- 91 Liebert 99
- User Menu Parameters 100
- 7.2 User-Graphic Menu Screens 101
- Event Log 102
- View Network 102
- 95 Liebert 103
- 97 Liebert 105
- 99 Liebert 107
- Active Alarms 108
- 101 Liebert 109
- 103 Liebert 111
- 105 Liebert 113
- 8.0 SERVICE MENU PARAMETERS 114
- Service Menu Parameters 115
- 107 Liebert 115
- 109 Liebert 117
- 111 Liebert 119
- 113 Liebert 121
- 115 Liebert 123
- 117 Liebert 125
- 119 Liebert 127
- 121 Liebert 129
- 123 Liebert 131
- 127 Liebert 135
- 129 Liebert 137
- 131 Liebert 139
- 133 Liebert 141
- Set Alarm Screens, Pages 4-12 142
- 135 Liebert 143
- 137 Liebert 145
- 139 Liebert 147
- 143 Liebert 151
- 145 Liebert 153
- 147 Liebert 155
- 149 Liebert 157
- 151 Liebert 159
- 153 Liebert 161
- 155 Liebert 163
- 161 Liebert 169
- Technical Support / Service 172
- Locations 172
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