Emerson Liebert iCOM User Manual download pdf (Page 42)

Operation

3.9.1 High- and Low-Temperature and Humidity Events

High- and low-temperature and humidity alarms can be set for both the internal and optional

external sensors. If a sensor reading exceeds a preset threshold, a warning will appear. These

warnings are ignored after unit startup for a minimum of 1 minute. To increase the delay to warn, see

3.9 - Event Types and Properties. The threshold settings are located in both the User and Service

menus under Set Alarms.

To apply threshold limits on the internal cooling unit sensors, the Return Sensor Alarms must be

enabled. The high and low temperature and humidity internal sensor thresholds can then be set. To

apply threshold limits on the optional external sensors, the Sensor A alarms must be enabled. The

high and low temperature and humidity external sensor thresholds can then be set. If no external

sensors are connected to the unit, it is recommended that the Sensor A Alarms be disabled.

3.9.2 User Inputs

The user can connect and specify up to four inputs depending on unit configuration. The user inputs

are digital inputs that can provide information about an event associated with the unit or space. The

customer input configuration settings are in the Service menu under Set Alarms, Screen 2 of 7. The

choices for the customer inputs are shown in Table 8 along with their associated reaction. A terminal

strip is provided in the cooling unit to connect your contact closure to. You have the ability to set the

control to react on an open or closed contact.

NOTE

The event messages will automatically reset if the temperature/humidity stays 1.8°F

(1°C)/ 2% RH below or above the threshold for one minute.

NOTE

To enabled/disabled, delay activation and set event type (alarm, warn, message) see Event

Types on page 34.

Table 8 Customer inputs

Setting Reaction

Smoke Event Only

Water Alarm Event Only

C PMP Alarm Event Only

Flow Alarm Event Only

Stdby G Pmp Event Only

Stdby Unit Event Only

C-Input 1 Event Only

C-Input 2 Event Only

C-Input 3 Event Only

C-Input 4 Event Only

Rht Lockout Event + Electrical Heaters Disabled

Hum Lockout Event + Humidifier Disabled

Rht+Hum Lock Event + Electrical Heaters and Humidifier Disabled

Comp Lockout Event + Compressor(s) Disabled w/o Pump Down

Call Service Event Only

High Temp Event Only

Air Loss Event Only

FC Lockout Event + Free Cooling Disabled

Heater Alarm Event + Heaters Off (Liebert PeX Only)

Flow AL SD Event + Shut Down the Unit

Flow AL LC Event + Lockout Compressors, No Pump Down (enabled only if at

least one compressor is on; auto-reset depends on input status)

Comp Lock PD Event + Compressor(s) Disabled w/ Pump Down

Enable FC Forces Free Cooling to On

HTRJ VFD Activates the HEAT REJ VFD ALARM; no other function

HTRJ TVSS Activates the HEAT REJ TVSS ALARM; no other function

1 2 ... 37 38 39 40 41 42 43 44 45 46 47 ... 107 108

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