AirSep MN138-1 H - Manual (Page 29)

23
MN138-1 Rev H
02/14
4.14 Oxygen Monitor Circuit Board Replacement (In Equipped Units)
Oxygen Monitor Circuit Board Removal
To remove the circuit board, follow the steps below:
Care must be taken when removing and installing tubing to circuit board
sensor to prevent damaging sensor.
1. Set the unit’s I /0 switch to the “0” position and unplug the power cord.
2. Remove both front and back panels.
3. When viewing unit from the back, locate oxygen monitor circuit board and
remove the tie-wraps at tubing connections.
4. Carefully remove tubing from circuit board sensor.
5. Disconnect wire harness from circuit board.
6. Using Phillips-head screwdriver remove screws securing circuit board to center
section. Remove circuit board.
Oxygen Monitor Circuit Board Installation
To install a new circuit board, follow the removal procedure in reverse order.
4.15 Mixing Tank Replacement
Mixing Tank Removal and Installation
To replace the mixing tank, follow the steps below:
1. Set the unit’s I/0 switch to the “0” position and unplug the power cord.
2. Remove both front and back panels.
3. When viewing unit from the back, locate mixing
tank and cut tie-wraps securing the
mixing tank to the center section. (Do not remove tie-wraps at this time.)
4. Disconnect tubing connections from the mixing tank before removing it.
5. After review of correct installation is made, remove the tie-wraps which held the
mixing tank in place. Install new tie-wraps to secure mixing tank to center section.
Do not tighten tie-wraps at this time.
6. Reconnect tubing to mixing tank, secure tubing with tie-wraps.
7. Position mixing tank into place and tighten tie-wraps to secure.
Before final installation, care must be taken when installing new
tie-wraps and the mixing tank to avoid pinching any tubing or
wires. Inspection for this should be thoroughly made before
final installation.
4.16 Exhaust Muffler Replacement
Exhaust Muffler Removal and Installation
VisionAire 2 uses an empty mixing tank assembly PN: TA004-1