Table of Contents
Advertisement
REPLACEMENT PROCEDURES (continued)
4.17
Ventilator Bellows Valve and Guide Assembly
The ventilator bellows valve and guide assembly is located in the bellows box
on the left side of the machine. Access to the valve case and guide assembly
requires that the bellows box front panel and the bellows canister be removed
from the bellows box. The monitor box will also need to be raised for access to
a connection inside the ventilator box.
Replacement Procedure 1 applies to machines with a two-piece tidal volume
adjustment and valve case assembly inside the bellows box. Figure 4-17 shows
the mounting and tubing arrangement.
Replacement Procedure 2 applies to machines with a one-piece tidal volume
adjustment and valve case assembly inside the bellows box. Figure 4-17A
shows the mounting and tubing arrangement for assemblies with either a
Humphrey or a Clippard valve.
Replacement Procedure 1:
4.17.1
Set the System Power switch to STANDBY, remove AC power from
the machine, and disable all circuit breakers.
4.17.2
Close all cylinder valves, and disconnect the pipeline hoses from the
machine.
4.17.3
Press the O
4.17.4
Adjust the TIDAL VOLUME knob to fully extend the volume
indicator to its minimum setting.
4.17.5
Disconnect the bellows hose and the scavenger hose from the bellows
assembly. Loosen the wingnuts and remove the bellows assembly.
4.17.6
Remove the canister from the bellows box by pulling it downward.
4.17.7
Remove the screws holding the front panel and tidal volume
adjustment knob, and remove the panel. The knob assembly remains
with the panel. On machines with a two-piece panel, remove the
angle plate above the knob panel. (Some older machines may have a
non-removable panel above the bellows adjustment knob.)
4.17.8
Remove the four socket head screws securing the valve case assembly
to the bellows top plate.
4.17.9
Carefully cut the tie strap at the exhaust port (front of valve) and
remove the large hose.
RETURN TO THIS MANUAL'S TABLE OF CONTENTS
RETURN TO CD-ROM TABLE OF CONTENTS
FLUSH button to relieve pressure from the system.
2
4-56
NM3
Advertisement
Table of Contents
Troubleshooting
