All operator cycle designations are reduced
to 24 volt AC operation. Normal electrical functions are operated
at 110 volt AC. The 24 volt AC operation reduces operator exposure
to electrical power.
Most control components shall be "plug-in" style which enhances
service if it should be required.
Sterilize (Cycle) and Dry Timers shall
be automatic reset type which allows the operator to visibly
acknowledge the preset time as well as the elapsed time.
A main wiring terminal strip allows easy
checking of electrical components if required.
All electrical connectors and wiring shall
be numbered and color coded for ease of service.
Cycle sequence shall be easily monitored
through the use of rectangular indicator lamps showing each
phase of cycle operation.
A "DOOR LOCKED" light shall illuminate
when the chamber door is properly closed.
**A "LOW STEAM PRESSURE" light will illuminate
and the cycle cannot be initiated if a low steam pressure
All operation functions shall be initiated
through the use of various solenoid valves which shall fully
control the cycle of the sterilizer.
Cycle selections shall be designated by
the operator by a single press of a button, and the cycle
selector shall illuminate to allow other personnel to realize
a cycle has been selected and started.
If electrical AC power is unavailable,
steam will not enter the chamber. If electrical power is interrupted,
the autoclave shall automatically vent all pressure from the
chamber, allowing the chamber door to be opened. Simultaneously,
the unit shall reset all cycle functions. When power is restored,
the cycle selection must again be designated by the operator.
The entire electrical circuit shall be
protected by a manual reset type circuit breaker, rated for
the maximum acceptable amperage for the electrical components
All electrical components shall be Underwriters
Laboratories approved and/or listed, as necessary.
Temperature control and documentation
shall be assured with the use of a United Electric Model 650,
61' inkless recorder, mounted in its own cabinet box and secured
to the control panel.
All piping shall be rigid brass with threaded
connections, with the exception of pressure sensing piping,
which shall be 1/4 " O.D. copper with flair or compression connections.
All solenoid operated valves shall be
of one manufacturer, and rated for a minimum of 50 psi operation.
All plumbing components shall be installed
with brass union connectors to allow ease of service or replacement,
* * Optional
All manual supply valves shall be "ball"
type, actuated with a manual handle.
Pressure gauges for supply steam pressure,
jacket pressure, and chamber pressure shall be mounted in
such a way that the operator can easily monitor variations.
The vessel shall be protected against
high pressure with the use of a safety valve rated at the
maximum operating pressure of the vessel as stated by the
original manufacturer, and shall not exceed A.S.M.E. standards.
The existing vessel shall be hydrostatically
tested at 1.5 times its rated working pressure to assure long
life of the vessel.
The interior shall be cleaned with the
use of a fine glass bead, applied under pressure, to remove
existing discoloration normally found on the inside chamber
The exterior shell shall be painted with
high heat temperature, rust retardant paint.
The exterior shell shall then be covered
with 2' thick, foil backed insulation to reduce ambient heat
normally released from the vessel.
The door for the vessel shall be refinished
and/or rebuilt, as needed.
The main control panel shall be fabricated
with .125" thick aluminum. All designation lettering shall be
engraved into the panel and paint filled, for long life and
The control panel shall be mounted to
a fabricated stainless steel primary frame on top of chamber,
and shall tilt down at the operator for ease of visual operation
and a pleasant cosmetic appearance.
The main control panel shall be hinged
for easy access for maintenance and calibration purposes.
All stainless steel and painted surfaces
shall be refinished as needed for a "like new" appearance (not
applicable to NEW sterilizers).
Complete calibration and testing shall
be performed prior to shipment.
Upon completion of installation, Alfa
shall provide complete orientation and demonstration of the
Installation is included only when so
quoted. Any structural or cosmetic repairs to existing walls,
floors, ceilings, etc. shall be the responsibility of the