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Operation
29 Liebert
®
iCOM
®
3.2.4 Fluid Temperature Monitoring
Two supply and two return chilled water temperature sensors may be added per unit for local and
remote monitoring of water temperature differential temperature. Temperature is monitored with 2T
sensors (two sensors on dual circuit units).
The first step in setting up the additional supply sensors is to program the DIP switches using
Table 5 below. The DIP switches may be access by removing the rear housing or through the precut
hole in the housing. See Figure 69 for additional information.
Figure 24 DIP switches in 2T sensors
After setting the DIP switches, see 4.3.3 - Terminate the Final Sensor on the CANbus Link to
complete the sensor installation.
Once the sensors have been connected, go to Service Menus> Sensor Calibration/Setup (Figure 149).
Locate the line that reads Chilled Water Sensor Type. Change the right hand parameter to 2T or Dual
2T. Verify the fluid inlet and outlet temperature readings with a field-supplied temperature sensor.
Compare the values measured with the meter and calibrate the temperatures as needed. Use the CW
Temp Sensor C1 / C2 Placement feature to swap the inlet and outlet temperatures shown in the
Liebert iCOM if the sensor probes are reading backward when measured with a field-supplied meter.
(Supply in the Liebert iCOM represents the actual return or vise versa).
3.2.5 Fluid Flow Monitoring
Fluid flow meters are available for monitoring fluid flow in
gallons per minute or liters per minute. When the flow meter is
coupled with fluid temperature sensors, Liebert iCOM will
calculate real time cooling capacity in kW or kBTU/Hr. Unit flow
rate and capacity may be hidden or shown from the unit view and
monitored through the Liebert IntelliSlot Unity Card. Contact
your local Emerson representative to obtain a flow meter.
3.3 Temperature Control
The temperature control parameters are in Service > Setpoints. The Temperature Setpoint parameter
is in both the User Menu and Service Menu under Setpoints.
The Liebert iCOM has two temperature control types:
• Proportional
•PI
• Intelligent (chilled water models only)
Each control type affects the timing and intensity of the cooling/heating operations. The Control Type
parameter is in Service>Setpoints.
Table 5 DIP switches in 2T sensors
CANbus
Node ID
DIP switch Position
12345678
Fluid Circuit 1 30 Off On On On On Off Off Off
Fluid Circuit 2 31 On On On On On Off Off Off
Circuit 1 and 2 fluid sensors are dual purpose CANbus ID’s in software. These sensors also may be used for supply temperature
monitoring of the conditioned space. Before considering installing fluid sensors, verify that the 2T supply sensors are not being
used. See the Service Menus, Sensor calibration, page 11 of 12 for more information. Adding duplicate sensors will result in
sensor communication loss.
Switch Up = ON
Switch Down = OFF
- 2
- TABLE OF CONTENTS 3
- 1.0 INTRODUCTION 11
- 2.2 System Screen 16
- USER MENUS 20
- 2.5 Display Setup 22
- Figure 16 User menu icons 24
- Table 2 User menu icons 24
- Figure 17 Service menu icons 26
- Table 3 Service menu icons 26
- 3.0 OPERATION 28
- Autorestart 29
- Loss of Power Alarm 29
- Minimum Fan Speed 31
- Operation 32
- 3.1.4 Power Monitoring 33
- Low-Pressure Time Delay 33
- Advanced DX Freeze Protection 33
- Pump Down 34
- High-Pressure Alarm 34
- 25 Liebert 35
- Settings 37
- 3.3 Temperature Control 39
- 3.3.1 Setting Up PI Control 41
- 3.3.2 Compressor Control 42
- Compressor Proportional Bands 42
- 3.4 Liebert Fluid Economizer 45
- Cooling—Free-Cooling 47
- Dual-Cooling Source 48
- 3.4.2 Liebert Air Economizer 48
- DETAIL CDETAIL B 49
- DETAIL D 49
- FRONT VIEW 49
- Both possible low-voltage 50
- Determine which applies 50
- 3.5 Liebert Air Economizer 51
- Operation 51
- System Overview 52
- 3.5.1 Liebert Air Economizer 52
- (Not by 53
- Emerson) 53
- Not in Operation 54
- Startup Configurations 54
- 45 Liebert 55
- 47 Liebert 57
- 3.6.2 SCR Reheat 60
- Tight Mode 60
- 3.7 Humidity Control 61
- 53 Liebert 63
- 3.7.1 Humidification 64
- Infrared Humidifier 64
- 3.7.2 Dehumidification 64
- Dehumidification Low Limit 65
- 57 Liebert 67
- 3.8 Supply Control 68
- 59 Liebert 69
- 3.9.1 Operation 70
- Temperature Compensation 70
- Racks with Equipment 75
- Figure 60 S190 Limit 77
- Figure 61 S190 Control 77
- 3.10.2 User Inputs 81
- 3.10.3 Analog Inputs 82
- 3.10.4 Liebert iCOM-DO 83
- Calculating Unit Wellness 85
- 4.0 TEAMWORK 87
- 4.2.2 No Teamwork 88
- 4.2.3 Teamwork Mode 1 88
- 4.2.4 Teamwork Mode 2 89
- Fixed Speed 90
- Variable Speed 90
- Teamwork 91
- 81 Liebert 91
- Figure 66 Remote sensors 92
- Figure 67 Sensor positioning 92
- 4.2.6 Hardware Setup 93
- 4.3.2 DIP Switch Settings 94
- Unterminated 96
- Terminated 96
- 87 Liebert 97
- 4.3.7 Software Setup 99
- 4.3.8 Standby—Rotation 99
- Standby and Cascade 100
- 91 Liebert 101
- Small Displays 103
- Small Graphics Display 105
- Liebert iCOM 106
- I/O Board 106
- Optional Large 107
- Graphics Display 107
- (Rear View) 107
- Liebert vNSA 108
- SITESCAN 109
- 6.2 Monitoring Points 110
- 7.0 USER MENU PARAMETERS 111
- User Menu Parameters 112
- 103 Liebert 113
- 7.2 User-Graphic Menu Screens 114
- Event Log 115
- View Network 115
- 107 Liebert 117
- 109 Liebert 119
- 111 Liebert 121
- 113 Liebert 123
- Active Alarms 124
- 115 Liebert 125
- 117 Liebert 127
- 119 Liebert 129
- 8.0 SERVICE MENU PARAMETERS 131
- Service Menu Parameters 132
- 123 Liebert 133
- 125 Liebert 135
- 127 Liebert 137
- 129 Liebert 139
- 131 Liebert 141
- 133 Liebert 143
- 135 Liebert 145
- 137 Liebert 147
- 139 Liebert 149
- 141 Liebert 151
- 143 Liebert 153
- 145 Liebert 155
- 147 Liebert 157
- 149 Liebert 159
- Set Alarm Screens, Pages 4-11 160
- 151 Liebert 161
- 153 Liebert 163
- 155 Liebert 165
- 157 Liebert 167
- Freecool Sensor 168
- 159 Liebert 169
- 161 Liebert 171
- 163 Liebert 173
- 165 Liebert 175
- 167 Liebert 177
- 169 Liebert 179
- 171 Liebert 181
- 173 Liebert 183
- 175 Liebert 185
- 181 Liebert 191
- (read only) 193
- Technical Support / Service 196
- Locations 196
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