Model IR4000S
15
3.4 Applying Power and Starting Operation
Once the mounting, cabling and alarm relay installation is complete, your IR400/IR4000S
detection system is ready to begin the power-on sequence. Please review this section
carefully before powering on your GM standalone detectors or your IR400/IR4000S
Monitor system.
3.4.1 Start-up
Readiness
Checklist
Prior to applying power to the system for the first time, check the following items for a
stand-alone IR400 detector and for an IR4000S monitor configuration.
NOTE:
The +24 V wire(s) to the power supply (supplies) should be connected after the
readiness checklist is verified, to protect the system from shorting. Since the
IR400 and IR4000S are designed to monitor continuously for hydrocarbon gas
leaks, they do not have power switches, to prevent accidental system shutdown.
1. Verify that all the signal wiring (except for +24 VDC) is installed correctly:
From each IR400 to a directly attached junction box, FMD or IR4000S
Between IR400 junction boxes, FMDs, IR4000S’s, and control room devices
From each IR4000S or FMD to Alarm relays (optional)
2. Make sure that the IR4000S and/or junction box lids are securely installed,
unless the area has been declassified.
3. Make sure to inhibit any external devices, such as Trip Amplifiers, PLC devices
or DCS systems until after the start-up sequence is completed.
4. Once you are ready to begin the start-up, verify that the power supply is
connected properly. The IR4000S and IR400 are powered by +24 VDC (20 to
36 VDC voltage range). The IR400 optional LED will output a low voltage fault at
or below 18 VDC.
