Invacare IRC5PO2 Manuale Utente
SECTION 10—CHECK VALVES
46
SECTION 10—CHECK VALVES
Replacing Check Valves
DANGER
To prevent electrical shock, ALWAYS disconnect concentrator from electrical outlet
before servicing.
before servicing.
NOTE: For this procedure, refer to FIGURE 10.1 on page 47.
1. Unplug unit.
2. Remove cabinet. Refer to Removing Cabinet on page 23.
NOTE: Replace one or both check valves when performing this procedure. The check valves are one‐
way directional and can be checked by passing air through them. Air should flow in one direction
only.
way directional and can be checked by passing air through them. Air should flow in one direction
only.
3. It may be necessary to remove the compressor HEPA inlet filer. Refer to Replacing the
4. Remove tie‐wraps from top and bottom of the check valve(s) and disconnect check
valve(s) from ¼‐inch PVC tubing.
WARNING
The check valves are one‐way directional and MUST be installed correctly. The letters
“VAC” are printed on the check valves. The check valves MUST be installed with the
“VAC” on the underside of the check valve. Low system pressures and eventual bed
contamination will result if check valves are not properly installed.
“VAC” are printed on the check valves. The check valves MUST be installed with the
“VAC” on the underside of the check valve. Low system pressures and eventual bed
contamination will result if check valves are not properly installed.
CAUTION
DO NOT put a check valve on the regulator outlet tubing. Otherwise, damage may result.
The regulator outlet tubing is identified by the flow arrow on the side of the regulator
which points to it.
The regulator outlet tubing is identified by the flow arrow on the side of the regulator
which points to it.
5. Install the new check valve(s) into the ¼‐inch PVC tubing on inlet tubing only.
6. Make sure “VAC” is on the underside of the check valve to ensure proper orientation
of check valves when installing.
7. Secure the check valve(s) by installing new tie‐wraps to the ¼ inch PVC tubing where
previously removed.
NOTE: If ¼ inch PVC tubing is damaged in any way, replace the section of ¼ inch PVC tubing
before installing check valve(s).
before installing check valve(s).
NOTE: Ensure check valves are not crossed. Left barb product tank check valve goes to left barb on
sieve bed. Right barb product tank check valve to right barb on sieve bed.
sieve bed. Right barb product tank check valve to right barb on sieve bed.