Emerson Liebert ICOM-DO User Manual Page 60
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Operation
Liebert
®
iCOM
®
for Liebert DSE
™
52
Low Noise / Fan Reversal
Fan reversal interval should be programmed at times when the unit is off (monitoring off, standby or
Remote Shut Down (RSD)).
Liebert iCOM (apart from the configuration and status screens) has to perform two timer activities:
• Low noise during programmed days / time (common for dual Liebert MC boards).
• Fan reversal in a specified frequency (allows separate settings for dual Liebert MC boards).
Figure 41 User-Condenser Timer, pages 1 and 2
U802 Low Noise Timer Enabled—Sets the low noise operations of the condenser fan. When the
parameter is set to “YES,” the low noise operation is selected. When set to “NO,” the low noise will be
disabled even if a schedule is set below. Low noise may be overridden by calculated gain sequence at
the Liebert MC to prevent a high-pressure situation.
U803 Noise Reduction On—Lists the day(s) that low noise feature can be scheduled if U802 is set
to “YES”.
U804 Whole Days—Selects the whole day(s) low noise operations will be available for the condenser
fan. When the parameter is set to “YES,” the low noise operation is selected for the whole day. When
set to “NO” the low noise will be disabled.
U805 Interval Days—Selects the interval day(s) low noise operations will be available for the
condenser fan. When the parameter is set to “YES” the low noise operation is selected. When set to
“NO” the low noise will be disabled even if an interval time is set below.
U806 Interval From—Selects the time of day that the low noise feature will be enabled between
00:00 and 24:00.
U807 Operating Mode (0=LN, 100=HE)—The first value represents the fan speed during low noise
operation. The second value represents the fan speed during normal or high efficiency operation. The
first value is linked to U818 and the second to U819.
U813 Select Condenser 2—This menu selection toggles between condenser 1 and 2. When “Select
Condenser 2” is shown, the data below is for condenser 1. When “Select Condenser 1” is shown, the
data below is for condenser 2.
U814 Fan Reversal Every x Days—Selection defines the numbers of days between fan reversals.
This parameter is adjustable from 1-100 days. The default set value is 0 days = OFF. Fan reversal can
only be performed with both compressors satisfied. Fan reversal interval should be performed during
standby periods. If the compressor is operating, the control will skip the scheduled reversal and retry
the next interval day. If the scheduled fan reversal is missed, the control will look for the next
available time to do a fan reversal where the compressor’s calls are met and initiate the reversal.
U815 Reverse Fan At:—Selection defines what time the fan reversal will be performed in 00:00 to
24:00.
- 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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