Precision Medical Air-Oxygen Blender - Manual (Page 15)

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Air-Oxygen Blender
B. Blender Setup
1. Mount the Blender into a secured mating wall or pole bracket in an upright position.
2. Secure the air and oxygen hoses to the corresponding Blender inlets.
3. It is recommended that a condensation trap be installed in the air supply line just
before the Blender air inlet.
4. Attach a flowmeter capable of 0-70 lpm to the auxiliary outlet on the Blender.
5. Attach a t-fitting to the outlet of the flowmeter.
6. Attach an Oxygen Analyzer/Monitor to the one outlet on the t-fitting.
7. Attach a calibrated Air or Oxygen Flow Monitor capable of 0-70 lpm or greater to
the other outlet on the t-fitting.
8. The system is now ready for an initial performance test.
C. Initial Performance Test
NOTE: Before pressurizing make sure proportioning valve assembly is secure and
screw is tightened.
1. Perform calibration on Oxygen Analyzer/Monitor per the manufacture’s instructions
prior to testing the Blender.
2. Set Air & Oxygen pressures to 50 psi (3.45 bar) each.
NOTE: Turn OFF and check for leak by watching for pressure drops on pressure
gauges.
3. An initial pressure drop may occur, no further drop in pressure should occur.
4. If continued pressure drop is observed, troubleshoot by using a commercial leak
detector to find source of leak and refer to Section 4: TROUBLESHOOTING for
further instructions.
5. Use a lint free dry cloth to wipe Blender clean of commercial leak detector.
6. Ensure both inlet pressures are at 50 psi.
7. Replace the top cover.
NOTE: DO NOT install the (4) mounting screws until the end of the Final Test,
or after satisfactory completion of the Performance Check.
Refer to the “OPERATING INSTRUCTIONS” in Users Manual.
8. Set flowmeter to 3-3.5 lpm.
9. Set the Blender to 60%
F IO
2
with Oxygen Analyzer/Monitor, this value should
remain within 3.0% of original reading throughout the following test.
a. Set flowmeter to 30-30.5 lpm, check concentration reading.
b. Set flowmeter back to 3-3.5 lpm.
c. Set air inlet pressure to 50 psi (3.45 bar) and the oxygen inlet pressure to
43 psi (2.96 bar) adjust flow to 3-3.5 lpm, check concentration reading.
d. Set air inlet pressure to 43 psi (2.96 bar) and the oxygen inlet pressure to
50 psi (3.45 bar) adjust flow to 3-3.5 lpm, check concentration reading.
e. If the Oxygen Analyzer/Monitor setting does not remain within 3.0% of the
original reading, then replace one or both of the diaphragm block assemblies.
NOTE: Diaphragm blocks shall be installed in pairs and Aluminum Blocks shall not be
mixed with Engineered Composite Blocks.