Service Manual
Integra E-Z Oxygen Concentrators
Chart SeQual Technologies Inc. Page 24 of 34 P/N 2917
6.2.6 Remove the four screw hardware sets that physically attach the POD to
the center frame (save them for reinstallation).
6.2.7 Installation is conducted in the reverse order. Ensure that the oxygen
feed tube is routed through the opening in the center frame
to the HEPA filter coming from the ATF. Torque the nuts to
8 inch-pounds.
NOTE:
Ensure the feed tube is not blocked, crimped
or kinked upon completion of the installation
or the unit will alarm for low oxygen flow
after the 10-minute warm-up cycle is
complete.
6.2.8 Start the unit and check for leaks at tubing connector to
oxygen HEPA filter.
6.2.9 6.10.9 Shut down unit and re-install covers.
6.3 Printed Circuit Board Assembly (PCBA) Replacement Procedure
6.3.1 Board Removal and Installation
6.3.1.1 To remove the PCBA, the POD needs to be removed from the unit. Remove the POD
Assembly by following guidance from section 6.2 “Removal and installation of the Pod
Assembly”. Once the POD is removed, replace the board as described in the following steps.
CAUTION:
When handling the printed circuit board assembly, use proper
Electro-Static Discharge (ESD) handling precautions.
NOTE:
The PCBA can be replaced in the POD assembly or the Front
Panel can be removed from the POD but will require disconnecting
the tubing at the check valve.
6.3.1.2 Disconnect the large flat ribbon cable connector attaching the Membrane Switch to the PCBA
(12 pin connector at J1)
6.3.1.3 Disconnect the small electrical connector attached to the Control Valve Assembly (6 pin
connector at J6).
6.3.1.4 Remove Qty 2 Zip Ties at the Inlet and Outlet of the Flow Tube. When disconnecting the
tubing a forward push of the tube onto the barb aids in the loosening the connection. Loosen
and remove the tubing from its fitting by gently pulling on the tube and twisting
simultaneously. Hold the sensor by its body when twisting and pulling the tubing.
CAUTION:
When pulling the tubing off the oxygen sensor it must be firmly
held by its body, to prevent the sensor from detaching from the
board. When pulling the tubing from the flow control valve, hold
the valve by its body and pull the tubing out.
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