Download MXN276 Swiftlock Autoclave Programmable Control

MXN276-3b.doc iss01 ed a
Page 19
stage is different
AUTOFILL OPTION
 



The Autofill option comprises a water tank and c
float switch controlled inlet valve. It also has a low
water float switch to detect water level supply
problems.
If fitted and configured ON the system
operates as described but when the cycle
starts it fills with water supplied from the
tank a pump up to the “RUNNING LEVEL” set
by the upper conductivity probe in the
chamber.
The * shown here is replaced by a
denoting state of the exhaust valve.
symbol
This is either “” BOX symbol
- This means the Valve is closed
or
“Three short lines” symbol “ ”
This means the valve is open.
During this period the system displays ;-



The valve cycles on and off throughout the
Airpurge period to achieve the PULSED
FREESTEAM operation.
Explanation Of Pulsed Freesteam.
If this goes on for too long there may be a
problem with water level detection, water
quality, or thepump and valvework. Please
consult your service agent.
PULSAR FREESTEAMING is the Astell
name for this patented system.
With this arrangement the controller turns the
VENT STEAM EXHAUST VALVE on and off in a
programmed manner, to permit steam to escape
in bursts, building up pressure slowly during the
"closed" period and releasing this to atmosphere
during the "open" period. This causes the
Boundary layer to move up and down within the
container, and the pressure reduction during the
"open" period is fast enough to cause great
turbulence within the chamber, breaking up the
boundary layer, and drastically increasing the rate
of diffusion of steam into the container and load.
At the end of this it goes to the stage
“HEAT TO STEAM “
If the water supply is affected and the tank
level falls the system will detct this and
indicate;-



The Open-Closed Cycle is factory-set to Typically
1 min open, 1 min closed .
Seek the source of the problem before calling
for service as the usuakl cause is that
someone has turned off the water!!
PULSED FREESTEAMING Option
The PULSAR ( pat) system is a Astell patented
system for improving steam penetration into
difficult loads without requiring the complication of
vacuum pumping systems.
When this option is fitted and selected within a
program , the behaviour in the AIRPURGE
19