Advanced Microprocessor with Graphics Control Setup

4.14.4Control Outputs

Active control outputs are indicated with LEDs on the lower section of the control board. Each LED is lit if the control output is active (on). Use these LEDs to assist in troubleshooting the system.

Table 12 Control output LEDs

LED

Control Output

R5

Heat Rejection

LLSV1

Liquid Line Solenoid Valve 1

HGBP1

Hot Gas By-Pass or Compressor Unloader Valve

C1

Compressor 1

C2

Compressor 2

RH1

Reheat Stage 1 or Hot Gas Reheat Solenoid

RH2

Reheat Stage 2

RH3

Reheat Stage 3

HUM

Humidifier

HGBP2

Hot Gas Bypass 2 or Compressor Unloader Valve 2

FAN

Main Fan

HMV

Humidifier Make-Up Valve

LLSV2

Liquid Line Solenoid Valve 2

4.15Communications

The control system uses a two-wire, RS-422 channel to communicate with remote monitoring systems via Liebert Site Products. This communication, directly out of the control, uses a proprietary protocol. Your unit can have a variety of different Site Product devices wired to this port depending on the monitoring system you are using.

Liebert Site Product Device

SiteScan Centralized Monitoring System—Stand alone facility monitoring system

SiteLink BMS Interface Module—For Modbus or BACnet communication to a third party moni- toring system

OpenComms Network Interface Card—For Ethernet connection using SNMP protocol

OpenComms D.O. Interface Card—For discrete outputs of status and alarm conditions

Mini-Remote - Stand alone individual unit remote monitor

ECA2 Communication Adapter—For remote service monitoring directly or via a modem

Consult the User Manual of the appropriate device for specific installation and operation information.

4.15.1Monitor functions:

1.Temperature/Humidity: Present readings

2.Status: Cooling/Heating and Humidifying/Dehumidifying operating status in percent

3.Present Alarms: Alarms presently active

4.Alarm History: 10 most recent alarms (60 most recent alarms for AG)

5.Run Time Log: Operating hours on major components

6.Daily Log: High and Low Temperature & Humidity

4.15.2View/Change Functions:

1. Setpoints: Temperature Setpoint

High Humidity Alarm

Temperature Sensitivity

Low Humidity Alarm

Humidity Setpoint

Cold Start Delay

Humidity Sensitivity

Humidifier Flush Rate

High Temperature Alarm

Chilled Water Flush Rate

Low Temperature Alarm

 

2.Control Type: Proportional, PID, Intelligent

3.PID Parameters: Proportional, Derivative and Integral Gains

4.On/Off Status

5.Time: View Only

6.Silence Alarm

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Emerson VH, DE, VE, DH manual On/Off Status Time View Only Silence Alarm

VE, DH, VH, DE specifications

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