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5.3. Replacing the Sample Hose
Inspect the inside diameter of the tube for signs of oil build up, dirt, obstructions, kinks, cuts, fraying, or
any other signs of wear before use. Oil contamination cannot be cleaned out of sample hoses due to the
density of the brass oil restrictor. If oil is visible in the hose assembly, replace the hose and brass
restrictor with P/N 2100-0010 (refer to Table 1-2 on page 3).
NOTE: The analyzer will indicate "Non-Condensable" or "Unknown Refrigerant" if it does not
receive a good sample due to obstructed flow or lack of flow (approximately less than 30 psig
or 2 Bar). If this occurs the sample hose may need to be replaced.
To replace the hose and restrictor assembly, follow the instructions below.
1) Disconnect the sample hose from the analyzer.
2) Remove the brass restrictor (with hose attached) from the coupler and discard. Be sure to use a
backing wrench to avoid damaging the coupler.
3) Check for signs of oil and debris in the coupler.
4) Using "CRC Brakleen" or similar cleaner which ONLY contains tetrachloroethylene and carbon
dioxide, follow the safety instructions on the can and spray all parts of the coupler with the
cleaner to remove the oil.
IMPORTANT:
5) Allow coupler parts to dry. Check coupler parts for oil once again. Failure to clean the oil out of
the coupler will result in premature clogging of the new filter.
6) Install the new brass restrictor (P/N 2100-0010) into the coupler and lightly tighten. Usually finger
tight is sufficient.
5.4. Changing the Printer Paper
Pur•Chek™ Pro Refrigerant Analyzers are equipped with on-board printers and use an inexpensive
thermal paper for printing. The paper roll should be changed when a red stripe appears on the left side of
the printout.
To change the paper roll, press the SET button shortly after powering on the analyzer (or any time that it
appears). See Figure 5-2 A. Press the SET button to advance to the screen shown in Figure 5-2 B.
Follow the instructions on the screen to load the paper.
16
DO NOT soak the parts for more than 60 seconds.
(A)
Figure 5-2. Screens Used in Changing Printer Paper
Operation and Maintenance Instruction Manual
(B)
P/N 2100-9001 Rev 3
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