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

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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