Bacharach 3015-3847 Instructions

These instructions describe how to replace the IR Optical Bench in the HGM300 Refrigerant Gas Monitor.
It is assumed that the user is familiar with the operation of the HGM300 / RDM800 Refrigerant Gas
Monitoring System. If necessary, refer to Instruction 3015-4148 for detailed operation and maintenance
information.
Items Required:
Replacement IR Optical Bench Kit 3015-3847:
•
IR Bench Assembly 3015-3412
o
Wire Ties (Qty. 2) 3015-2835
o
Instruction Sheet 3015-3848
o
• Medium Phillips Head Screwdriver
• Small Flat Blade Screwdriver
• Wire Cutter (for removing wire ties)
Removing the IR Optical Bench
Figure 1. HGM300
Refrigerant Gas Monitor
Replacement Kit 3015-3847
1. Find the HGM300 Refrigerant Gas Monitor and switch OFF its AC
circuit breaker. Observe that the monitor's green MONITOR ON
indicator light on the front panel should be OFF.
2. Use a Phillips screwdriver to loosen the monitor's two door latches,
and then open the door.
3. Take a few minutes to familiarize yourself with the internal
components of the HGM300 shown in Figure 2.
Figure 2. HGM300 Components
HGM300 Optical Bench
Instruction 3015-3848
Upper Gas Sample Tube
Upper Electrical Connector (Red)
Upper Wire Tie
Main Board
Lower Wire Tie
AC Power Switch
Lower Electrical Connector
Lower Gas Sample Tube
Rev. 0 – October 2005