Procedure 5 - Replacing Check Valves - Invacare 6LXO2 Service Manual

PROCEDURE 5
PROCEDURE 5 - REPLACING CHECK VALVES (FIGURE 1)
C
H
TO PREVENT ELECTRICAL SHOCK, ALWAYS DISCONNECT CONCENTRATOR FROM
E
ELECTRICAL OUTLET BEFORE SERVICING.
C
K
1. Unplug unit.
2. Remove cabinet (Refer to PROCEDURE 1 - REMOVING CABINET)
V
NOTE: Replace one or both check valves when performing this procedure. The check valves are
A
one-way directional and can be checked by passing air through them. Air should flow in one
L
direction ONLY.
V
3. Loosen adjustable clamp on product tank and slide clamp down below the adjustable clamp hanger to
E
access check valve(s).
S
4. Remove ty-wraps from top and bottom of the check valve(s) and disconnect check valve(s) from tygon
tubing.
The check valves are one-way directional and MUST be installed correctly. The letters VAC are
printed on the bottom half of the check valves and should be installed with VAC to the underside
of the check valve. Low system pressures and eventual bed contamination will result if not prop-
erly installed.
5. Install the NEW check valve(s) into the tygon tubing.
NOTE: Ensure proper orientation of check valves when installing.
6. Secure the check valve(s) by installing new ty-wraps to the tygon tubing where previously removed.
NOTE: If tygon tubing is damaged in any way, replace the section of tygon tubing before installing
check valve(s).
7. Run unit and check for leaks (Refer to PROCEDURE 19 - LEAK TEST).
8. Reinstall cabinet (Refer to PROCEDURE 1 - REMOVING CABINET).
Underside of
Check Valve
CAUTION
CAUTION
Check Valve
Tygon Tubing
Adjustable
Clamp
FIGURE 1 - REPLACING CHECK VALVES
Ty-wraps
(2 per Check
Valve).
Check Valve
Product Tank
40
CHECK VALVES