0024-9551 Revision 1
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PCA
®
400 User Manual
IMPORTANT: The water trap’s lter element should prevent soot from reaching
the analyzer’s internal components. If the probe is not kept clean, it could become
clogged and restrict the ow of gas into the analyzer, resulting in incorrect
combustion test readings and calculations.
IMPORTANT: An analyzer that is used to test natural gas furnaces normally
requires less frequent cleaning than an one which is used for testing coal- or
oil-red furnaces.
DANGER: NEVER use ammable or combustible substances (like the carburetor uid
used to clean the probe) near an open ame.
2. Open Filter Chamber
Using a small at-blade screwdriver, pry apart the Filter Chamber. Remove and discard the
old Water Trap Filter.
3. Install New Filter
Install new lter and reassemble the Filter Chamber, making sure that surfaces “A” and “B”
contact each other.
4. Reassemble Water Trap Assembly
Firmly press the bayonet connections into place and twist in a clockwise fashion to secure.
5.3 Cleaning the Probe Assembly
The probe tube and sample line will become dirty during normal use.
Materials / Equipment Required
Before cleaning the probe assembly, obtain the following items:
Alcohol
Aerosol Can of Automotive Carburetor Cleaner
Clean Cloth
Source of Compressed Air (User Discretion)
1. Disconnect Sample Line from Water Trap
Remove the sample line from the top of the water trap.
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