Emerson E2 Refrigerant Leak Detection System Rlds, Copeland Scroll K5 Refrig- eration Compressor

6.3.9Refrigerant Leak Detection System (RLDS)

The RLDS provides for the continuous monitoring of refrigerant gas levels in up to 16 separate test zones or channels. The instrument is programmed to monitor a variety of gases and independent leak (small), spill (medium), and evacuation (large) levels may be desig- nated for each zone. The instrument also retains a log of previous readings that can be accessed for analysis.

Figure 6-8 - RLDS

The RLDS has alarm level configuration parameters that are synchronized. These will be read first from the device. The E2 will be master of all other parameters. An audible alarm and front panel indicators are provided to signal alarm and fault conditions, and relay contacts are provided that can be used to trigger external alarm devices in the event of a system fault, or if a leak (small), spill (medium), or evacuation (large) level of gas is detected. The system also may be fitted with an optional two-chan- nel 4-20mA current loop board for connection to remote monitoring equipment.

The RLDS features full two-way communications via an RS485 interface. MODBUS RTU is the communication protocol standard and can be connected directly to an E2 controller version 3.02 and above. The RLDS is dynami- cally licensed for 15 devices for RX/BX/CX 300-500 and 1 for RX100 and CX100 (same as IRLDS).

6.3.9.1Diagnostic Alarms

Diagnostic Alarm	Descriptions
Box Temp Fault	Chassis temperature is out of range
Bench Temp Fault	Sensor temperature is out of range
Manifold Pressure Fault	Pressure readings out of range
RS-485 Fault	Communication Error
Loop Fault	Current loop is open
Config. Fault	No zones are enabled
Zero Filter Fault	Charcoal filter needs repl.
Gain Set Fault	Gain setting is out of range
A2D Fault	A/D converter is not working
Zone Flow Fault	No flow during sample cycle
Purge Flow Fault	No flow during purge cycle
Over Range Fault	Conc. above measurable range
Zero Range Fault	Sensor voltage outside limits
Clipping Fault	Sensor output voltage too high

Table 6-7-Diagnostic Alarm Outputs

6.3.10Copeland Scroll – K5 Refrig- eration Compressor

The Copeland Scroll — K5 Refrigeration Compressor (Lrg Ref Scroll) application can monitor large type com- pressors using the MODBUS network on E2 versions 3.02 and above. The Copeland Scroll — K5 Refrigeration is supported on E2 CX-400, CX-100 and above. The E2 monitors and records compressor information, configura- tion setup, status display, and alarm handling. The Cope- land Scroll — K5 Refrigeration will be associated with the suction group from the Compressor Association screen. The scroll can be associated by pressing  - Controller Associations then  - Compressor.

Figure 6-9- Compressor Association Screen

ECT MODBUS The RS485 Network and Hardware Setup • 6-11