Emerson Liebert ICOM-DO Manuel d'utilisateur Page 51
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- Table des matières
- MARQUE LIVRES
Noté. / 5. Basé sur avis des utilisateurs
Operation
43 Liebert
®
iCOM
®
for Liebert DSE
™
3.6 Supply Control
The supply temperature sensor should be placed in an area that is influenced only by the unit it is
connected to. The supply sensor must be located 5-15 ft. (1.5-4.5m) from the unit to provide an
accurate reading for the control.
Figure 30 Placing the supply air temperature sensor
The Supply Air sensor can be used to control or reference the discharge air temperature of the cooling
unit. This sensor can be added to existing Liebert iCOMs by purchasing the supply sensor and wiring
harness. The supply air sensor must be connected to P13, Pins 1 and 2. Contact your local Emerson
representative for pricing and installation.
When the supply sensor is set to Control, the unit will control the amount of cooling / heating being
provided based on maintaining the discharge air temperature. The return air sensor may still be used
to control fan, humidity or as temperature/humidity reference of the room.
• Supply Limit: The supply limit can be enabled only when the unit’s temperature control sensor is
set to either Remote Sensor or Return Sensor. The unit may be set up with the supply air sensor
to maintain a minimum air temperature under a raised floor to help prevent condensation. To
avoid supply temperatures that are too low, the Supply Limit can influence the opening of
three-point or analog actuators, or compressor capacity. The control compares the deviation from
the return air setpoint and the supply limit setpoint and calculates the output to the actuator
from the smaller deviation.
When the supply air sensor is set up for Temperature control, additional Supply Air configuration
parameters (valve pulse, cooling filters and return compensation) can be used to further enhance the
supply air control.
• The cooling filter timer can be adjusted to prevent oscillating around the supply setpoint and still
allow for rapid cooling capacity adjustments to compensate for heat load changes. Contact your
local Liebert service personnel for adjustments.
• Return Compensation begins to increase the supply air setpoint when the return air temperature
decreases below the return air setpoint.
Example
Setting the return compensation value in the Service > Setpoints menu to 5°F (2.7°C) will increase
the supply setpoint from 50°F to 55°F (10°C to12.8°C) when the return temperature is at the low
limit of the proportional band.
Temperature
Sensor
5 to 15feet
(1.5 to 4.5m)
Internal Temperature
and Humidity Sensor
Return
Air
Supply Air
Liebert
Cooling Unit
- 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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