HARVEY Chemiclave EC5500, Service Manual, Page: 30 / 56

30
M
AINTENANCE AND
S
ERVICING
4. If the door tension is tight and there are still
leaks, inspect the gasket. Replace if necessary
(see “Gasket Replacement”).
5. If there are leaks around the seal screws, check
the door collar. Replace the seal screws, and the
door collar if required.
Leaks at Pressure Relief Valve
See “Pressure Relief Valve.”
Leaks at Metering Valve
See “Metering Valve.”
Metering Valve
Checking for Leaks
1. Turn power switch to OFF. Remove top cover.
Turn power switch ON and allow unit to heat up
to operating temperature.
2. Turn control knob to PRESSURIZE.
3. Check the metering valve for any external leaks.
If so, replace the metering valve.
4. The metering valve may allow a small amount of
air to leak by the supply side, which will show up
as champagne bubbles in the fill tube. The
metering valve may also allow a small amount of
air to leak by the exhaust side, which will cause
fluid movement in the exhaust tube. One or the
other is OK as long as the unit maintains maxi-
mum pressure during a cycle, but if both condi-
tions occur; replace the metering valve.
Removing Old Metering Valve
1. Set control knob to depressurize. Be sure the
pressure gauge reads, “0.” Turn OFF power
switch and allow unit to cool to room tempera-
ture.
2. Remove top cover.
3. Unplug the float switch from the timer/display PC
board.
4. Remove air line tubing connector from filter
holder and remove filter holder.
5. Loosen the clamp next to the reservoir on tubing
leading to metering valve.
Note
If the VAPO light is not ON prior to
turning the unit OFF, Vapo Steril will run
out of the reservoir when it is removed.
To prevent this, plug the reservoir
opening or empty the Vapo into a
container.