Ametek ASR900, Installation And Maintenance Manual

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4-8 | Heated Acid Gas Sample Probe (Large Diameter)
The design of the HAG Probe allows for regular Preventive
Maintenance without having to remove the Probe from the sample
stream.
However, if the main Sample/Vent Isolation valves or the optional
Double Block valves need to be replaced (
Extended Maintenance ),
additional steps are required, as described in this procedure.
“P/N” refers to Part Number.
All screws are metric (mm) unless otherwise noted.
To change out parts in the HAG Probe (Figures 4-1, 4-2, 4-3):
This procedure assumes that all appropriate safety precautions
have been met to power down the analyzer and HAG Probe, and
the Electronics Enclosure is already open as described under
“Preparing the Analyzer and Sample Probe for Maintenance” in
this chapter.
1. Remove the Insulating Jacket from the HAG Probe.
The Heater Assembly may be extremely hot. Allow the heater and the
probe to cool down to a temperature that allows safe handling before
working on these parts.
2. To allow easy removal of the Heater Assembly loosen, remove, and pull
back the Sample and Vent Lines from their fittings on the HAG Probe.
3. Remove the (4) M6 x 60 screws that secure the Heater Assembly to the
HAG Probe (Figure 4-4). Remove the Heater Assembly from the Probe
and pull it back to allow room to work on the Probe.
Depending on your maintenance requirements, below, continue with
the appropriate step:
• If you are replacing the o-rings, Hi-Flow Membrane, Fiber Filter
Element, and Sintered Disk, and/or the Isolation Valves in the
Sample Probe, continue with Step 4.
• If you are replacing parts in the Heater Assembly, continue with
“Replacing Parts in the Probe Heater Assembly” later in this chap-
ter. Return to this procedure when complete.
!
WARNING

NOTE
!
WARNING

NOTE