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Maintenance
Warnings & Cautions
WARNING: Always disconnect AC power before working inside the monitor.
CAUTION: When working inside the monitor, be very careful not to dislodge any
electrical wiring or pneumatic tubing. The AGM-SZ contains sensitive electronic
components that can be easily damaged. Be careful not to touch or disturb any of these
components.
Hydrophobic Filters
Hydrophobic Filters (Page 8) located in both the gas-sample and purge lines prevent water from entering the IR
detector. A zone flow fault will occur (fault code <0800>) if the gas-sample filter becomes blocked, while a
purge flow fault will occur (fault code <1000>) if the purge filter becomes blocked. Replace the appropriate filter
as required (P/N 07-1650).
Servicing Air Lines & Termination Filters
The gas-sample line and the optional purge and exhaust lines should be periodically checked for obvious signs
of kinks, damage, and contamination. Replace the tubing as required (P/N 304-2742).
The gas-sample line and purge-line termination filters prevent dust and dirt from entering the monitor. Both of
these filters should be periodically checked and replaced when there are obvious signs of contamination. A
zone flow fault will occur (fault code <0800>) if the gas-sample line filter becomes blocked, while a purge flow
fault will occur (fault code <1000>) if the purge-line filter becomes blocked. To service the filter, simply remove it
from the line and replace it with a new one (P/N 3015-3420).
Fuses
The AGM-SZ is protected from electrical damage by two, 1 A, 250 V, type "F" fuses (Page 8). Carefully remove
the fuses from their fuse clips and visually inspect each fuse for damage. Replace the fuses as required (P/N
04-2620).
Clock Battery
The Clock Battery (Page 8) maintains the correct date and time when AC power is not applied to the monitor.
Replace this battery about every 5 years (P/N 204-0020).
Sample Pump
The Sample Pump (Page 8) draws the gas sample into the monitor, through the IR detector, and discharges the
sample out the monitor's exhaust port. When replacing the pump, remove its inlet and outlet tubing, disconnect
the AC power wires from the pump itself, and remove pump from monitor. Install a new sample pump (P/N
3015-5176).
Instruction 3015-4286
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