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Annual Maintenance RLDS Maintenance • 65

13.5.3. Annual Maintenance Checklist

Table 13-1 is a checklist to aid in your annual maintenance routines. The RLDS is designed for easy 

installation and maintenance. For full details about installation, programming, and operation of the RLDS, refer

to the appropriate sections in this manual. For illustration of the internal components, see Section 3.5., RLDS

Interior.

Item Description

Repaired/

Replaced (Y/N)

Checked/

Completed (Y/N)

1 a. Turn the monitor power off.

b. Visually inspect the exterior of monitor for damage and

mounting integrity.

c. Inspect air sample tubing for damage and leakage at 

termination points.

2 Replace the Charcoal purge filter.

3 Replace the Hydrophobic filter.

4 Replace the line end filters.

5 With power off, check all internal wiring terminations and

connections.

6 Close and secure the door and restore power to the monitor.

7 Check the Detector Voltage Range on the diagnostic screen.

The range should be 4.20 to 4.28 volts. If adjustment is 

required, recycle the power by pressing the reset button at the

bottom of the motherboard.

8 Check the sample pump VAC pressures (typical -3.2 to -3.5

DP) at -2 DP prepare to change out pump on next 

maintenance cycle.

9 Check the HGM-RD remote display (if applicable) for 

existing faults or check the node/time out status.

10 After a 15-minute warm up cycle, unit enters normal 

operation. After the unit cycles through all zones, verify that

no fault conditions are present.

11 Gas test zones with bump gas.

NOTES: ____________________________________________________________________________________

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Table 13-1 - Annual Maintenance Checklist

Emerson RLDS User Manual

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