STERIS Amsco Service Manual

OPERATING INSTRUCTIONS

Amsco® Century®

Gravity and Prevacuum Sterilizers

(11/13/06) P129367-408

STERIS Mexico

Avenida Avante 790

Parque Industrial Guadalupe

Guadalupe, Nuevo Leon, Mexico C.P. 67190

www.steris.com

© 2006– STERIS Corporation. All rights reserved.

Printed in U.S.A

Table of Contents

Operating Instructions

129367-408

A WORD FROM STERIS CORPORATION

Advisory

Service

Information

Indications for Use

This manual contains important information on proper use of this sterilizer. All operators and department supervisors are urged to carefully review and become familiar with the warnings, cautions and instructions contained herein.

This sterilizer is specifically designed to process goods using only the cycles as specified in this manual. If there is any doubt about a specific material or product, contact the manufacturer of the product for the recommended sterilization technique.

STERIS carries a complete line of accessories for this unit to simplify, organize and assure sterility of the sterilization process. Instrument trays, pouches and biological/chemical monitoring systems are all available to fulfill your facility’s processing needs. A STERIS representative will gladly review these with you.

A summary of the Safety Precautions to be observed when operating and servicing this equipment can be found in Section 1 of this manual. Do not operate or service the equipment until you have become familiar with this information.

Any alteration of the sterilizer not authorized or performed by STERIS which could affect its operation will void the warranty, could adversely affect sterilization efficacy, could violate federal, state and local regulations and jeopardize your insurance coverage.

A thorough preventive maintenance program is essential to safe and proper sterilizer operation. You are encouraged to contact STERIS concerning our Preventive Maintenance Agreement. Under terms of this agreement, preventive maintenance, adjustments, and replacement of worn parts are done on a scheduled basis to assure equipment performance at peak capability and to help avoid untimely or costly interruptions. STERIS maintains a nationwide staff of well-equipped, factory-trained technicians to provide this service, as well as expert repair services. Contact STERIS for details.

The Amsco® Century® Steam Sterilizer is designed for efficient, sterilization of non-porous and porous, heat and moisture-stable materials used in healthcare facilities. The Century Steam Sterilizer is available in the following configurations:

16" x 16" x 26" Single Door Gravity	16" x 16" x 26" Single Door Prevacuum
16" x 16" x 26" Double Door Gravity	16" x 16" x 26" Double Door Prevacuum
20" x 20" x 38" Single Door Gravity	20" x 20" x 38" Single Door Prevacuum
20" x 20" x 38" Double Door Gravity	20" x 20" x 38" Double Door Prevacuum

i

Table of Contents

Operating Instructions

129367-408

The Amsco Century Steam Sterilizer is equipped with the following factoryprogrammed sterilization cycles and cycle values:

PREVACUUMCONFIGURATION

CYCLES	RECOMMENDED	STERILIZE	STERILIZE	DRY TIME
	LOADS	TEMP.	TIME
FLASH	Unwrapped	270°F	3.0 minutes	1.0 minute
	Instrument tray with	(132°C)
	a single instrument.
FLASH	Unwrapped instrument	270°F	10 minutes	1.0 minute
	tray with non-porous	(132°C)
	multiple instruments,
	maximum weight 17lbs.
EXPRESS	Single wrapped	270°F	4.0 minutes	3.0 minutes
	instrument tray with	(132°C)
	a single instrument.
	Non-porous goods only.
PREVAC	Up to two double	270°F	4.0 minutes	20 minutes1
	wrapped instrument	(132°C)
	trays,maximum
	weight 17 lbs. Up
	to six fabric packs.
PREVAC	Up to two double	275°F	3.0 minutes	16 minutes
	wrapped instrument	(135°C)
	trays,maximum
	weight 17 lbs.

1Five minute Dry Time can be used for processing a single fabric pack.

GRAVITY CONFIGURATION

CYCLES	RECOMMENDED	STERILIZE	STERILIZE		DRY TIME
	LOADS	TEMP.	TIME
FLASH	Unwrapped	270°F	3.0 minutes		1.0 minute
	Instrument tray with	(132°C)
	a single instrument.
FLASH	Unwrapped instrument	270°F	10	minutes	1.0 minute
	tray with non-porous	(132°C)
	multiple instruments,
	maximum weight 17lbs.
GRAVITY	Up to two double wrapped	270°F	15	minutes	30 minutes
	trays, maximum	(132°C)
	weight 17 lbs.
GRAVITY	Up to six Fabric Packs.	250°F	30	minutes2	15 minutes
		(121°C)

2 A 270°F (132°C) cycle adjusted to 25 minute Sterilize Time can be used for processing fabric packs.

ii

129367-408

Operating Instructions

Table of Contents

TABLE OF CONTENTS

Section Title Page

A WORD FROM STERIS CORPORATION ......................................		i
1 SUMMARY OF SAFETY PRECAUTIONS ............................		1-1
2	STERILIZATION TECHNIQUES .........................................	2-1
	2.1 General ..............................................................................................................	2-1
	2.2 Special Information Regarding the Express Cycle ..............................................	2-1
	2.2.1 Preparing Instruments for Express Cycle Sterilization ..................................	2-2
	2.2.2 Unloading .....................................................................................................	2-2
	2.3 Special Information Regarding The Flash Cycle .................................................	2-3
	2.4 Control Measures For Verifying Sterilization Process .........................................	2-4
	2.4.1 Biological Monitors .......................................................................................	2-4
	2.4.2 Testing for Prevacuum Efficiency ................................................................	2-4
	2.5 Dart (Bowie-Dick) Test .......................................................................................	2-5
	2.6 Vacuum Leak Test .............................................................................................	2-5
	2.7 Sterilization Process Recommendations ..........................................................	2-5
3	COMPONENT IDENTIFICATION ........................................	3-1
	3.1 General ..............................................................................................................	3-2
	3.2 Main Sterilizer and Cycle Controls ......................................................................	3-2
	3.3 Control Displays .................................................................................................	3-3
	3.4 Alarm Displays ...................................................................................................	3-4
	3.5 Operating End Control Panel ..............................................................................	3-5
	3.6 Cycle Selection Touch Screen Pads ..................................................................	3-6
	3.6.1 Values Touch Screen Pads ..........................................................................	3-6
	3.6.2 Abort Touch Screen Pad ..............................................................................	3-7
	3.7 Printer ................................................................................................................	3-7
	3.8 Printouts .............................................................................................................	3-8
	3.9 Power Door Operation ........................................................................................	3-9
	3.10 Emergency Door Opening Procedure ..............................................................	3-10
	3.11 Optional Electric Steam Generator .................................................................	3-11
4	STERILIZER OPERATION.................................................	4-1
	4.1 Before Operating the Sterilizer ............................................................................	4-1
	4.2 Preparing Loads for Sterilization Cycles ............................................................	4-2
	4.3 Guidelines for Placement of Various Loads ........................................................	4-3
	4.4 Unloading the Sterilizer .......................................................................................	4-4
	4.5 Loading Car Instructions: Loading ......................................................................	4-5
	4.6 Loading Car Instructions: Unloading ...................................................................	4-6
	4.7 Loading/Unloading Sterilizer Equipped With Rack and Shelves ..........................	4-6
	4.8 Sterilizer (Factory) Cycle Settings ......................................................................	4-7
	4.9 270°F Flash Cycle ..............................................................................................	4-8
	4.10 Gravity Cycle .................................................................................................	4-11
	4.11 270°F Express Cycle ......................................................................................	4-14
	4.12 270°F Prevac Cycle ........................................................................................	4-17
	4.13 275°F Prevac Cycle ........................................................................................	4-20
	4.14 DART (Bowie-Dick) Test (Prevacuum Sterilizer only) ....................................	4-23
	4.15 Vacuum Leak Test (Prevacuum Sterilizer only) ..............................................	4-25

Section 4 Contents Continued On Next Page

iii

Table of Contents

Operating Instructions

129367-408

TABLE OF CONTENTS (Cont'd)

Section	Title	Page
	4.16 Optional Liquid Cycle ......................................................................................	4-27
	4.17 Sterilization Techniques for Optional Liquid Cycle ..........................................	4-30
	4.18 Recommendations for Sterilizing Liquids ........................................................	4-31
	4.19 Aborting Cycles ..............................................................................................	4-32
	4.20 Cycle Graphs .................................................................................................	4-33
5 STERILIZER CYCLES AND CYCLE VALUES......................		5-1
	5.1 Sterilizer (Factory) Cycle Settings ......................................................................	5-2
	5.2 Change Values ...................................................................................................	5-3
	5.3 Change Cycle Values .........................................................................................	5-4
	5.3.1 Overview ......................................................................................................	5-4
	5.3.2 Step by Step ................................................................................................	5-4
	5.4 Adjusting Sterilize Time And Dry Time ...............................................................	5-7
	5.5 Change Time and Date .......................................................................................	5-8
	5.6 Change Machine Setup ....................................................................................	5-10
	5.7 Access Code ....................................................................................................	5-11
	5.8 Lockout ............................................................................................................	5-13
	5.9 Utilities Control .................................................................................................	5-14
	5.10Language ........................................................................................................	5-17
	5.11 Machine Number ............................................................................................	5-18
	5.12 Time Format ...................................................................................................	5-19
	5.13 Print Format ...................................................................................................	5-20
	5.14 Audible Signals ..............................................................................................	5-21
	5.15 Units ...............................................................................................................	5-22
	5.16 Date Format ...................................................................................................	5-22
	5.17 Duplicate Print ................................................................................................	5-23
	5.18 Leaving Change Values ..................................................................................	5-23

LIST OF TABLES

Table	Title	Page
2-1	Cycle Availability ......................................................................................................................	2-1
2-2	Item Processing Guidelines For Express Cycle ........................................................................	2-2
3-1	Required Feed Water Quality for Carbon Steel Steam Generators ..........................................	3-12
4-1	Factory-Set Cycles and Cycle Values .......................................................................................	4-7
4-2	Liquid Cycle Parameters ........................................................................................................	4-30
5-1	Cycle Availability ......................................................................................................................	5-1
5-2	Factory-Set Cycles and Cycle Values .......................................................................................	5-2
5-3	Change Machine Setup ..........................................................................................................	5-10

iv

129367-408

Operating Instructions

Table of Contents

SUMMARY OF SAFETY PRECAUTIONS

1

Following is a list of the Safety Precautions which must be observed when operating this equipment. WARNINGS indicate the potential for danger to personnel, and CAUTIONS indicate the potential for damage to equipment. These precautions are repeated (in whole or in part), where applicable, throughout the manual. This is a listing of all Safety Precautions appearing in the manual. Carefully read them before proceeding to use or service the unit.

WARNING - BURN HAZARD:

!When sterilizing liquids, to prevent personal injury or property damage resulting from bursting bottles and hot fluid, you must observe the following procedures:

•Use Liquid cycle only; no other cycle is safe for processing liquids.

•Use only vented closures; do not use screw caps or rubber stoppers with crimped seals.

•Use only Type I borosilicate glass bottles; do not use ordinary glass bottles or any container not designed for sterilization.

•Do not allow hot bottles to be jolted; this can cause hot-bottle explosions. Do not move bottles if any boiling or bubbling is present.

!It is inappropriate for a healthcare facility to sterilize liquids for direct patient contact.

!Sterilizer, rack/shelves, and loading car will be hot after cycle is run. Always wear protective gloves and apron when removing a processed load. Protective gloves and apron must be worn when reloading sterilizer following the previous operation.

!Before daily flushing of the generator, generator must be at zero psig and cooled to room temperature.

!Do not attempt to open the sterilizer door if a WATER IN CHAMBER ALARM condition exists. Call a qualified service technician before attempting to use sterilizer further.

!Sterilizer operator may be severely burned by scalding water if the water level control malfunctions. The steam generator level control may malfunction if the supply water exceeds 26,000 ohms/cm (38.5 conductivity min.). Do not connect to treated water (e.g., distilled, reverse osmosis, deionized) unless water resistivity is determined to be acceptable. If water exceeds 26,000 ohms/cm, contact STERIS Engineering Service for information concerning modifications required to the generator control system.

!After manual exhaust, steam may remain inside the chamber. Always wear protective gloves, apron and a face shield when following emergency procedure to unload sterilizer. Stay as far back from the chamber opening as possible when opening the door.

!Allow sterilizer to cool to room temperature before performing any cleaning or maintenance procedures.

!Failure to shut off the steam supply when cleaning or replacing strainers can result in serious injury. Jacket pressure must be 0 psig before beginning work on the steam trap.

!Proper testing of the safety valve requires the valve to be operated under pressure.Exhaust from the safety valve is hot and can cause burns. Proper safety attire (gloves, eye protection, insulated overall) as designated by OSHA, is required. Testing is to be performed by qualified service personnel only.

!Steam may be released from the chamber when door is opened. Step back from the sterilizer each time the door is opened to minimize contact with steam vapor.

1-1

Summary of Warnings and Cautions

Operating Instructions

129367-408

WARNING – ELECTRIC SHOCK AND BURN HAZARD:

!Disconnect all utilities to sterilizer before servicing. Do not service the sterilizer unless all utilities have been properly locked out. Always follow OSHA Lockout-Tagout and electrical safety-related work practice standards. (See CFR 1910.147 and .331 through .335.)

WARNING – PERSONAL INJURY HAZARD:

!Avoid personal injury from bursting bottles. Liquid sterilization cycle must only be used for liquids in borosilicate (Pyrex) flasks with vented closures.

!Doormustbelockedandthekeyretainedpriortoenteringchamberforservicing. Always follow appropriate Lockout-Tagout and electrical safety-related work practice standards. Emergency stop switch can be depressed and key retained on sliding door units.

WARNING - EXPLOSION HAZARD:

!This sterilizer is not designed to process flammable compounds.

WARNING - SLIPPING HAZARD:

!To prevent falls keep floors dry by immediately wiping up any spilled liquids or condensation in sterilizer loading or unloading area.

WARNING – PERSONAL INJURY AND/OR EQUIPMENT DAMAGE HAZARD:

!Regularly scheduled preventive maintenance is required for safe and reliable operation of this equipment. Contact your STERIS service representative to schedule preventive maintenance.

!When closing the chamber door, keep hands and arms out of the door opening and ensure opening is clear of obstructions.

!Repairs and adjustments to this equipment must be made only by fully qualified service personnel. Maintenance performed by inexperienced, unqualified persons or installation of unauthorized parts could cause personal injury or result in costly equipment damage.

WARNING - STERILITY ASSURANCE HAZARD:

!Loadsterilitymaybecompromisedifthebiologicalindicatororairleaktestindicatesapotentialproblem. If these indicators show a potential problem, refer the situation to a qualified service technician before using the sterilizer further.

!According to AAMI standards, a measured leak rate greater than 1.0 mm Hg/minute indicates a problem with the sterilizer. Refer the situation to a qualified service technician before using the sterilizer further.

!TheExpresscycleisonlyintendedforusewithasingleinstrumentinasinglewrappedinstrumenttray.

!The Express cycle is not intended for processing porous items (except the tray wrapper).

!The Flash cycle is not intended for processing porous items.

1-2

129367-408

Operating Instructions

Summary of Warnings and Cautions

CAUTION - POSSIBLE EQUIPMENT DAMAGE:

!Gasket must be fully retracted prior to operating sterilizer door.

!Failure to flush generator daily could result in malfunction of the generator. Warranty on the generator will be voided unless flushed daily.

!Before flushing generator, ensure generator drain valve is fully open to prevent generator heaters from turning on during flush phase.

!If zero dry time is selected, sterilizer automatically initiates a vapor removal phase in place of drying. This phase can still draw a vacuum to 5.0 inHg. Consult device manufacturer's recommendations to ensure devices being processed can withstand this depth of vacuum.

!Lifting the chamber float switch when cleaning the chamber may cause the sterilizer control to initiate a “Chamber Flooded” alarm. If this alarm condition occurs, the operator must turn the control power OFF then ON to clear the alarm. The control power switch is located in the mechanical area at the side of the sterilizer. Placing the sterilizer in standby does not clear this alarm.

!Never use a wire brush, abrasives, or steel wool on door and chamber assembly. Do not use cleaners containing chloride on stainless-steel surfaces. Chloride-based cleaners will deteriorate stainless steel, eventually leading to failure of the vessel.

!Do not use cleaners containing chlorides on loading cars. Chloride-based cleaners will deteriorate the loading car metal.

!Sterilization of chloride-containing solutions (e.g., saline) can cause chamber corrosion and is not recommended by the manufacturer. If, however, chloride-containing solutions must be processed, clean the chamber after each use.

!Allow thermostatic traps to cool down to room temperature before removing cover. Since there is nothing to limit expansion, the bellows may rupture or fatigue if trap is opened while hot.

!Actuation at less than 75% of rated pressure can allow debris to contaminate the seat and cause the safety valve to leak. A leaking safety valve must be replaced.

!Insufficient service clearance will make repairs more difficult and time-consuming.

!Piping sized too small may cause water hammer, resulting in damage to the sterilizer.

!After installation, it is mandatory to brace piping at the drain funnel so that it will not move vertically.

!Make sure door opening is clear of any obstruction before closing the door(s).

!Do not attempt to open sterilizer door during manual operation unless chamber is at 0 psig.

!During manual operation, gasket must be fully retracted prior to operating sterilizer door.

!Immediately wipe up saline solution spills on loading car, to prevent damage to stainless steel.

1-3

Summary of Warnings and Cautions

Operating Instructions

129367-408

STERILIZATION TECHNIQUES

2

The information in this section is intended as a general guide to steam 2.1 General sterilization techniques. Also recommended is reference to the standards of the Association for the Advancement of Medical Instrumentation (AAMI ST-46,

Steam Sterilization and Sterility Assurance, 3rd Edition).

WARNING – BURN HAZARD:Itisinappropriatefor ahealthcarefacilitytosterilize liquids for direct patient contact.

•Prior to sterilization, all materials and articles must be thoroughly cleaned.

•After sterilization, goods should be stored in conditions that will not compromise the barrier quality of their wrapping materials.

•Always carefully segregate items which have been sterilized using conventional cycles from those sterilized using Flash or Express cycles.

IMPORTANT:The sterilization cycles listed in Table 2-1 have been validated using techniques documented in AAMI ST-8 and AAMI ST-37. If different cycle parameters (sterilize time and dry time only) other than those in Table 2-1 are required, it is the responsibility of the health care facility to validate the cycle. Reference AAMI guidelines/standards for a guide to validating sterilization cycles and to ensure that proper sterility assurance level (SAL) as well as moisture retention acceptance criteria are met.

NOTE: Contact your customer service representative for information on a wide range of education/training programs designed to meet the educational needs of health care industries.

TheExpresscycle is anabbreviatedprevacuumcycle that is intended for use only on prevacuum sterilizers, and is not provided on gravity sterilizers.

Table 2-1. Cycle Availability

Cycle

Sterilize

Sterilize

Dry

Prevac

Gravity

Type

Load

Temperature

Time

Time

Default

Optional

Default

Optional

Gravity*

Full Load Fabric Packs

270°F

25 min

15 min

X

X

Gravity*

Full Load Fabric Packs

250°F

30 min

15 min

X

X

Gravity*

Full Load Instrument Trays

270°F

15 min

30 min

X

X

Gravity*

Full Load Instrument Trays

250°F

30 min

30 min

X

X

Liquid*

Three 1000ml Bottles

250°F

45 min

N/A

X

X

Prevac*

Single Fabric Pack

270°F

4 min

5 min

X

N/A

N/A

Prevac*

Full Load Instrument Trays

270°F

4 min

20 min

X

N/A

N/A

Prevac*

Full Load Instrument Trays

275°F

3 min

16 min

X

N/A

N/A

Flash**

Unwrapped, Non-porous

Instrument Tray

270°F

3 min

1 min

X

X

Express**

Single-wrapped

Instrument Tray

270°F

4 min

3 min

X

N/A

N/A

Flash

Unwrapped, Non-porous

Instrument Tray

270°F

10 min

1 min

X

X

DART*

Bowie-Dick Test Pack

270°F

31/2 min

1 min

X

N/A

N/A

Leak*

Test

None

N/A

N/A

N/A

X

N/A

N/A

*Cycles qualified to AAMI ST-8

**Cycles qualified to AAMI ST-37

2-1

Sterilization Techniques

Operating Instructions

129367-408

2.2 Special

Information

Regarding the

Express Cycle

WARNING – STERILITY ASSURANCE HAZARD: The Express cycle is only intended for use with a single instrument in a single wrapped instrument tray.

2.2.1 Preparing

Instruments for

Express Cycle

Sterilization

WARNING – STERILITY ASSURANCE HAZARD: The Express cycle is not intended for processing porous items (except the traywrapper).

2-2

Appropriate parameters for sterilization are preset by STERIS. It is designed to permit sterilization using a single instrument in asingle wrapper (non-woven or textile, but not a peel pouch) on the instrument tray.

Rationale: The single wrapper serves to confine and contain the sterilized item from environmental contaminants that may be encountered enroute from the sterilizer to the point of use. A single wrapped item sterilized with the Express cycle does not have a shelf life.

The Express cycle is useful in providing quick turnaround of an instrument using the wrapped technique for transport from the sterilizer to the point of use.

Instrument trays processed using the Express cycle are intended for immediate use.

Decontaminate and then prepare a surgical instrument (open and/or disassembled), and place in a perforated or mesh bottom instrument tray. Only nonporous items (except for the wrapper) should be processed using this cycle.

Items with lumens (e.g., needles for injection and diagnostics or metal suction cannulae) are considered porous items, and must not be processed using this cycle.

The Express cycle has fewer prevacuum pulses so air removal and subsequent steam contact within lumens may be difficult to achieve.

Table 2-2. Item Processing Guidelines for Express Cycle

Examples of non-porous items that can be processed using the Express cycle:

•Forceps,

•Needle Holders,

•Scissors and other routine metal instruments.

Examples of porous items that CANNOT be processed using the Express cycle:

•Towels,

•Rubber or Plastic Items,

•Items with Lumens,

•Items with sliding parts that prevent sterilant contact with surfaces.

129367-408

Operating Instructions

Sterilization Techniques

2.2.2 Unloading

2.3 Special

Information

Regarding The

Flash Cycle

WARNING – STERILITY ASSURANCE HAZARD: The Flash cycle is not intended for processing porous items.

Use instrument processed in an Express cycle immediately. Do not store for later use.

When opening and unloading the sterilizer at the conclusion of the Express cycle always use aseptic techniques. Sterile towels and sterile gloves are used to remove the tray from the sterilizer. The still-wrapped tray is transported to the point of use, being careful not to contact any unsterile surfaces. The tray is placed on a previously draped sterile surface field and the wrapper opened by the circulating nurse. The draping material used must be impervious to liquids and able to withstand contact with hot surfaces.

To shorten the sterilization process, drying time has been reduced in the Express cycle. Thus, the single wrapper will appear dry at the conclusion of the cycle, but the content of the package will, in all probability, still be wet with condensation formed during sterilization. Water will penetrate the wrapper, especially on the under side of the tray because of gravity. The wrapper only serves the function of protecting the tray and its content from particulate matter encountered on the way from the sterilizer to the point of use.

Any moisture present can strike through the wrapper, so procedures should be developed to avoid contamination by contact with unsterile surfaces. For example:

•Wear sterile gloves and use sterile towels as “pot holders” when removing the goods from the sterilizer.

•Never place the wrapped tray on an unsterile surface.

The Flash Cycle is an abbreviated gravity cycle and is provided on both the Amsco® Century® prevacuum and gravity configurations. The Flash cycle has been designed to sterilize an unwrapped item at sterilization parameters preset by STERIS. There is no storage or shelf life of flash sterilized items.

Rationale: The Flash Cycle is intended for sterilizing an unwrapped item intended for immediate use (e.g. a dropped instrument). In any method of sterilization, it is important to adhere to good processing practices. This is particularly important in flash sterilization.

Preparing Instruments For Flash Cycle Sterilization

As prescribed in AAMI ST-37, prior to flash sterilization of a dropped instrument, ensure the item is free of soil by the appropriate decontamination procedure. The flash sterilized item then must be transferred immediately, using aseptic technique, from the sterilizer to the actual point of use, usually the sterile field in an ongoing sterile procedure.

Use items processed in a Flash Cycle immediately. Do not store the processed items for later use.

2-3

Sterilization Techniques

Operating Instructions

129367-408

2.4 Control

Measures For

Verifying

Sterilization

Process

2.4.1 Biological

Monitors

As part of the operator's verification of the sterilization process, biological indicators may be used to demonstrate that sterilization conditions have been met.

NOTE: Contact STERIS for information on specific biological indicators recommended for use with this sterilizer.

A live spore test utilizing G. stearothermophilus is the most reliable form of biological monitoring. This type of product utilizes controlled populations of a controlled resistance, so that survival time and kill time can be demonstrated.

To verify the process, insert the biological indicator in a test pack and place pack on the bottom shelf. Run test pack through a typical cycle. On completion, forward test pack and monitor to appropriate personnel for evaluation. Refer to AAMI guidelines to conduct routine biological monitoring.

2.4.2 Testing for Prevacuum Efficiency

WARNING – STERILITY ASSURANCE HAZARD: Load sterility may be compromised if the biological indicator or air leak test indicates a potential problem. If these indicators show a potential problem, refer the situation to a qualified service technician before using the sterilizer further.

Run a Dart® (Bowie-Dick test) cycle daily before processing any loads. The first prevacuum cycle of each day should be used to test the adequacy of air removal from the chamber and load, so that steam can penetrate the load. It is not a test for adequate exposure to heat in terms of time-at- temperature.

Tests such as the Bowie-Dick or the Dart® (Daily Air Removal Test)* are designed to document the removal of residual air from a sample challenge load.

In the case of these tests, following exposure in a prevacuum sterilizing cycle, the pack is opened, the indicator examined and conclusions are drawn as to the pattern of residual air, if any, that remained in the pack during the sterilizing cycle. Any indication of a malfunction must be reported to the supervisor. Sterilizer should not be used during this time.

*Available from STERIS.

.

2-4

129367-408

Operating Instructions

Sterilization Techniques

2.5 Dart (Bowie-

Dick) Test

Conduct a residual air test (e.g., Bowie-Dick test) at the beginning of each day according to the AAMI standard ST-46. STERIS can provide a product called Dart® (Daily Air Removal Test), designed to be as sensitive as the standard AAMI Bowie-Dick test pack in detecting air leaks. Refer to instructions for running Dart test given in Section 4 of this manual. If a Dart is not available, construct Bowie-Dick test package in accordance with instructions given in AAMI standard ST-8.

2.6 Vacuum Leak

Test

WARNING – STERILITY ASSURANCE HAZARD: According to AAMI standards, a measured leak rate greater than 1.0 mm Hg/minute indicates a problemwiththesterilizer. Refer the situation to a qualified service technician before using the sterilizer further.

Run the Vacuum Leak test cycle daily or weekly. This test measures the integrity of the sealed pressure vessel and associated piping to assure air is not being admitted to the sterilizer during the vacuum draw downs. Refer to appropriate cycle description in Section 4 of this manual.

After running a vacuum leak test, a value or leak rate will be printed on the printer tape. This value will help define a trend over a period of time if the integrity of the system begins to deteriorate (i.e., allowing air to enter the system). By running a vacuum leak test cycle daily or weekly, the operator or maintenance personnel can always monitor the air tightness of the system and make repairs or adjustments when necessary.

NOTE: A leak rate of greater than 1.0 mmHg per minute indicates a problem with the sterilizer that must be addressed.

2.7 Sterilization

Process

Recommendations

Saturated steam is a well controlled, reliable method for processing items which can withstand the temperatures and pressures associated with steam sterilization. The requirements for achieving reproducible results are well known by many users, but are not always understood by all users.

The condition most likely to result in sterilization problems is a failure to remove all of the air from the items being processed. For example, placing an empty beaker or bowl in an upright position in a gravity displacement sterilizer may result in the object not being sterilized, or may require exceptionally long sterilization times. This problem is because air has almost twice the density as does saturated steam under the same conditions. Thus, the air sits in the bottom of the container, and the steam forms a stable layer over the air. This effect is similar to oil forming a stable layer over water. As long as there is no mechanism for actively mixing the two, the bottom of the container will only see dry heat, which is not an effective sterilization method at the temperatures typically used in steam processes.

There are two traditional methods for enhancing the sterilization of solid bottom containers in gravity displacement cycles. These are:

•Place 1.0 mL of water for each liter of volume in the bottom of each container. The expansion of the water into steam as the product is heated will force most of the air out of the object, thus allowing steam to reach all surfaces and effect sterilization.

•The better, more reliable method is to orient all objects in a manner which would allow water to flow out. When the steam enters the chamber, it will tend to layer over the air. However, the object is now oriented so the air can flow out. As the air flows out of the container, it will be replaced by the steam. The steam can now reach all surfaces and effect sterilization.

2-5

Sterilization Techniques

Operating Instructions

129367-408

COMPONENT IDENTIFICATION

3

Steam

Supply

Valve

Touch Screen

Century Control Panel	Control Access
	Door

Access Panel
(Front panel of
unit is hinged	Printer
for service
access)

	Foot Pedal
Century Sterilizer	Touch Screen
Generator Water
Supply Valve	Century Control Panel w/Door Open

Sight

Glass

Generator Drain Valve

JACKET

CHAMBER

Optional Electric

Steam Generator

Main Power Disconnect Switch. This should be left on at all times.

Figure 3-1. Amsco® Century® Sterilizer Components

3-1

Component Identification

Operating Instructions

129367-408

3.1 General

3.2 Main Sterilizer

and Cycle

Controls

Open

Closed

JACKET

CHAMBER

Steam Supply Valve

Open

Closed

Use this manual to become familiar with control locations and functions before operating the sterilizer (refer to Fig. 3-1). The controls for this sterilizer are contained within the control touch screen. Control touch pads appear on the screen as needed during each operation. Available controls change as the sterilizer steps through different operations.

•Main Power Disconnect Switch (refer to Fig. 3-1) – Located behind the access door, on the main control box, this switch disconnects power to the control. Under normal operation, this switch is left in the open position at all times.

•Steam Supply Valve – This is located behind the front access door, above the chamber door. Refer to Figure 3-2. Ensure this is in the open position before trying to operate the sterilizer.

•Water Supply Valve – This is located behind the front access door, below the chamber door. Refer to Figure 3-2. Ensure this is in the open position before trying to operate the sterilizer.

•SteamGeneratorControl – The optional integral electric steam generator (if present) is located in the space below the sterilizer chamber. The generator is automatically turned on by the sterilizer’s control when the sterilizer is turned on. Refer to the instructions later in this section before operating a sterilizer equipped with an integral steam generator.

Sterilizer Status

Current

Time & Date

Touch Screen Pad—Press to Turn the Sterilizer ON

STATUS ............	STANDBY	0
TIME ..................	00:00 AM
DATE .................	00-00-00

ON

Standby Screen

STATUS ............	DOOR OPEN		1
TEMP .................	000F
PRESS ...............	00 PSIG
1	2	3	4
FLASH	FLASH	EXPRESS	PREVAC
270F	270F	270F	270F
S=03M	S=10M	S=04M	S=04M
D=01M	D=01M	D=03M	D=20M

Water Supply Valve

	00:00 AM		00-00-00
	PAPER	MENU	MORE	STANDBY
	FEED		CYCLES

ON Screen

Figure 3-2. Main Sterilizer and Cycle Controls

3-2

129367-408

Operating Instructions

Component Identification

3.3 Control

Displays

»Generator Water Supply Valve (refer to Fig. 3-1) – This valve should always be open. Ensure it is open before attempting to operate the sterilizer.

»GeneratorDrainValve (refertoFig.3-1) – Thisshouldbeopenedonce a day, while generator is at room temperature, to flush the generator of residual solids (present in most water) that may have accumulated in the generator’s boiler. After the boiler has been flushed ensure the drain valve is then closed. Refer to instructions later in this section.

•Sterilizer Control Touch Pad – This is visible on the control touch screen whenever the sterilizer is in Standby mode. Refer to Figure 3-2.

NOTE: Screen touch pads respond to very slight pressure, and only need to be pressed lightly.

The sterilizer enters operating mode when the ON touch pad is pressed. This touch pad switches the sterilizer control between Standby and Ready conditions (Standby mode is usually used at night when the sterilizer is not being operated—steam is turned off and machine cools, saving energy).

A screen reference number appears in the upper right corner of each display. Numbers are used for reference only, and do not relate to the operating sequence of the screen.

Control displays can be divided into two categories, those occurring when the sterilizer is “out-of-cycle” and those occurring when the sterilizer is "in-cycle".

Typical out-of-cycle and in-cycle displays are shown in Figure 3-3.

•Out-of-cycle displays are used to start cycles, or set up and adjust sterilizer operation. With the exception of the cycle starting displays, most out-of-cycle displays will only be used occasionally. Detailed instructions for adjusting the sterilizer operating parameters are in Section 5 of this manual.

•Generally, when the sterilizer is in-cycle, displays appear automatically and, unless an abnormal conditions occurs, require no special attention or instructions. In-cycle displays tell the operator at what temperature and pressure the sterilizer chamber is operating, show the current cycle phase and indicate when the processing cycle is complete. For more details about operating cycles, refer to Section 4 of this manual.

	STATUS ............	DOOR OPEN		1
	TEMP .................	000F
	PRESS ...............	00 PSIG
	1	2	3	4
	FLASH	FLASH	EXPRESS	PREVAC
	270F	270F	270F	270F
	S=03M	S=10M	S=04M	S=04M
	D=01M	D=01M	D=03M	D=20M
	00:00 AM		00-00-00
	PAPER	MENU	MORE	STANDBY
	FEED		CYCLES

Out-of-Cycle

STATUS ............	STERILIZE 00:00	4
TEMP ................	000 F
PRESS .............	00 PSIG
CYCLE ..............	1, FLASH, 270F, S=03M, D=01M
	PROJECTED CYCLE COMPLETION TIME:
	0:00
	MINUTES	SECONDS
PAPER	STATUS
		ABORT
FEED	PRINT

In-Cycle

Figure 3-3. Typical In and Out-Of-Cycle Display

3-3

Component Identification

Operating Instructions

129367-408

Alarm displays tell operators and technicians when the sterilizer is experienc- 3.4 Alarm Displays ing an abnormal condition. Alarm conditions can be caused by failure of utility supplies or sterilizer components. Section 5 of ROUTINE MAINTENANCE MANUAL (P129367-410), details the steps an operator can take to solve most

alarm conditions. Typical alarm displays are shown in Figure 3-4.

When an alarm occurs during cycle operation, a display appears on the screen, accompanied by an audible tone. This display indicates the problem as determined by control sensors, and lists a brief troubleshooting list. The operator should follow the instructions on the screen, if possible. If these instructions fail to clear the alarm, consult your departmental supervisor or a trained service technician before using the sterilizer further.

STATUS ............	ALARM!	205
	TOO LONG IN CHARGE
→ CHAMBER:	70.0 F 00.0 psig

STERILIZER WILL:

→ AUTOMATICALLY TRY TO COMPLETE CYCLE

OPERATOR INSTRUCTIONS:

1.SILENCE ALARM

2.CHECK STEAM SUPPLY VALVE → IF CLOSED, OPEN VALVE

3.IF ALARM RECURS, CALL SERVICE

SILENCE		ABORT	SERVICE
	STATUS	PAPER
ALARM	PRINT	FEED	HELP

STATUS ............	SERVICE INFORMATION:
	TOO LONG IN CHARGE

→CHAMBER DID NOT REACH STERILIZE TEMPERATURE WITHIN ALLOTTED TIME

CAUSES AND CORRECTION:

1.STEAM PRESSURE LESS THAN 50 PSIG

→CHECK STEAM SUPPLY PIPING

2.STEAM REGULATOR MALFUNCTION

→REPAIR

2.SOLENOID VALVE MALFUNCTION

→REPAIR S09

→REPAIR S02

3.CONTROL OUT OF CALIBRATION

→RECALIBRATE (CONTACT QUALIFIED SERVICE PERSON)

	ABORT	PAPER
		FEED

206

EXIT

Figure 3-4. Typical Alarm Displays

3-4

129367-408

Operating Instructions

Component Identification

3.5Operating End Control Panel

A sterilizer equipped with two doors, will also be equipped with two control panels. The control panel at the loading door of the sterilizer is referred to as the "operating end control," the control panel located at the unloading door is referred to as the "non-operating end control."

A single-door sterilizer is equipped with an "operating end control," only.

NOTE: Except for the presence of the printer (which is only present at the operating end of the unit), control panels at both ends of the unit are similar and each can be used to start or abort the sterilizer.

The operating end control panel (see Fig. 3-5) is used to:

•Select and start cycles.

•Abort cycles.

•Set cycles and cycle values.

•Obtain status printouts (see “Printer” paragraph later in this section).

The operating end control includes a printer for cycle documentation.

Cycle status and control messages are shown on a 30 column x 40 line graphics display. Cycles can be started or aborted using the touch screen pads. Cycles and cycle values can be set using the Change Values procedure (accessible from the sterilizer MENU screen). If changing cycle values becomes necessary, refer to Section 5 of this manual.

STATUS ............	STERILIZE 00:00	4
TEMP ................	000 F
PRESS .............	00 PSIG
CYCLE ..............	1, FLASH, 270F, S=03M, D=01M
	PROJECTED CYCLE COMPLETION TIME:
	0:00
	MINUTES	SECONDS
PAPER	STATUS
		ABORT
FEED	PRINT

When in-cycle, the display shows a status of the sterilizer, status of the cycle, and large numbers indicate the approximate time remaining in the current cycle.

STATUS ............	MENU		2	Typical Menu Screen
TEMP .................	128F
PRESS ...............	0 PSIG
CHANGE	CHANGE	CHANGE	DUPLICATE
TIME
	CYCLE	MACHINE	PRINT
&
	VALUES	SETUP
DATE

	PAPER	EXIT
	FEED

Menu Screen

Figure 3-5. Operating End Control Panel

AMSCO Time 00:00:00

AMSCO Time 00:00:00 AMSCO Time 00:00:00

AMSCO Time 00:00:00 AMSCO Time 00:00:00

AMSCO Time 00:00:00

Cycle

Cycle

Printout

Touch

Touch

Screen

3-5

Component Identification

Operating Instructions

129367-408

3.6 Cycle

Selection Touch

Screen Pads

Four cycle selection touch pads are shown on the screen in Figure 3-6. These pads display the basic parameters of the cycle (cycle name, sterilization exposure temperature, sterilization exposure time and dry time), additional cycles may be selected by pressing MORE CYCLES. Details on individual cycles are in Section 4.8.

Up to seven additional cycles can be programmed and displayed. It is the responsibility of the healthcare facility to validate the cycle. Reference AAMI for guidelines and standards for a guide to validating sterilization cycles and to ensure that proper sterility assurance level (SAL) as well as moisture retention acceptance criteria are met.

Press to Start (Select) Cycles

	............STATUS	DOOR OPEN		1
	TEMP .................	000F
	PRESS ...............	00 PSIG
	1	2	3	4
	FLASH	FLASH	EXPRESS	PREVAC
	270F	270F	270F	270F
	S=03M	S=10M	S=04M	S=04M
	D=01M	D=01M	D=03M	D=20M
	00:00 AM		00-00-00
	PAPER	MENU	MORE	STANDBY
	FEED		CYCLES

Press to Start (Select) Cycles

Press for More Cycles

Figure 3-6. Cycle Selection Touch Pads

3.6.1 Values Touch These touch screen pads are accessed through the MENU screen by pressing Screen Pads CHANGE CYCLE VALUES.The values touch pads are used for changing the operating values used in cycles, changing the cycles displayed on the cycle selection menus, and for changing the operating settings of the sterilizer.

Instructions for changing sterilizer cycle parameters are in Section 5 of this manual.

Sterilization Exposure

Temperature

Cycle Name

11

SELECT ITEM TO CHANGE

1	TEMP	STER	DRY
FLASH	270 F	03 M	01 M

Sterilization Exposure

Time

Dry Time

EXIT

Figure 3-7. Values Touch Screen Pads

3-6

129367-408

Operating Instructions

Component Identification

3.6.2 Abort Touch	TheABORT touch screen pad is used to end a cycle before it finishes normally.
Screen Pad	A cycle only needs to be aborted if an abnormal condition or a control problem
	develops during the cycle. Pressing ABORT causes the sterilizer chamber to
	depressurize (if pressurized), or Air Break (if in vacuum), the door seal
	deactivates, the control prompts the operator to open the door, and the
	sterilizer returns to its normal out-of-cycle state. If an abnormal condition
	persists after fully aborting the cycle, contact your supervisor or a qualified
	service technician before trying to operate the sterilizer further.

STATUS ............	STERILIZE 00:00	4
TEMP ................	000 F
PRESS .............	00 PSIG
CYCLE ..............	1, FLASH, 270F, S=03M, D=01M

PROJECTED CYCLE COMPLETION TIME:

	0:00		Abort Touch
	MINUTES	SECONDS	Screen Pad
PAPER	PRINT	ABORT
FEED	STATUS

Figure 3-8. Cycle AbortTouch Screen Pad

Refer to Figure 3-1.

3.7 Printer Printerrecordsallcycledataon2-1/4inchwidesingle-plypaper.SeeROUTINE MAINTENANCE MANUAL (P129367-410) for paper changing procedure. Printer functions controlled by touch screen pads are as follows:

•Paper Feed — Press to feed out paper from the roll stored inside the control. Accessible during all phases of operation, including alarm conditions. Press and hold for continuous feed.

•Duplicate Print — Press to obtain a complete duplicate printout of the last previously run cycle (when unit is not in cycle). This touch pad is only visible on the screen during Complete and Change Values menu. The Duplicate Print touch screen pad is not visible upon first power-up of the day.

•Status Print — Press to obtain a printout of current cycle phase and conditions (when unit is in cycle). This touch pad is only visible during cycle operation.

•Print Values — Press to obtain a printout of all currently set cycles and cycle values. Only accessible when the unit is not in cycle. This touch screen pad appears on Change Values menu only.

3-7

Component Identification

Operating Instructions

129367-408

Refer to Figure 3-9.

3.8 Printouts The printout reports useful information about each cycle the sterilizer runs. This includes the load number, which is a unique identifying code. Each load

number is printed in the following format: a two digit month (e.g., January = 01), a two digit day (e.g., second day of any given month = 02) and a two digit daily cycle count (e.g., third cycle of the day = 03). In our examples the complete load number would then be 010203.

During the cycle, status lines on the printouts show the time the line was printed, chambertemperatureandthelevelofvacuumorpressureinthechamber.Each status line also begins with a letter code. This code indicates during which cycle phase the print line occurred, or what kind of event caused the print line to occur.

Refer below to see other features of the printout.

Cycle Type

Cycle Start Time & Date

Total Cycle Count

Operator I.D.

Machine Number

Sterilize Temp.

Control Overdrive Temp.

Sterilize Time

Dry Time

Conditioning

•Charge

•Vacuum Pulses

Additional Status Print Codes:

F = Alarm (Failure)
L = Leak Test (Vacuum or Hold)
D = Demand Print (Print Status)	Sterilize

Exhaust & Dry

Complete

Load Number

Sterilize Temp. Min./Max.

Time in Phase

Total Cycle Time

Review and verify critical cycle parameters were achieved during processing, then sign printout to indicate verification.

Figure 3-9. Typical Printout

3-8

129367-408

Operating Instructions

Component Identification

3.9 Power Door

Operation

Figure 3-10. Foot Pedal

The sterilizer door is operated at the foot pedal (refer to Fig. 3-10).

•Pressing the foot pedal while the door is in the closed (up) position causes the door to open (lower).

•Pressing the foot pedal while the door is in the open (lowered) position, causes the door to close (by raising).

NOTE: The foot pedal only provides control of the visible door. For double-door units, the foot pedal cannot be used to control the door at the opposite end of the sterilizer.

Important: Keep the door closed when the unit is not in use.

WARNING-PERSONALIN- JURYHAZARD:Whenclosingthechamberdoorkeep hands and arms out of the door opening and ensure opening is clear of any obstructions.

Operation of Power Door if Motor Fails

If the power door cannot be operated using the foot pedal (such as during a power failure or if the drive mechanism is damaged), it is still possible to operate the door manually.

Using hand pressure, pull up or push down on the handle to operate the door. Increased effort is required on the part of the operator to slide the door. Do not try to raise or lower door rapidly as fast operation may damage the door drive mechanism.

NOTE: If the power fails, and pressure remains in the sterilizer chamber, refer to Section 3.10, Emergency Door Opening Procedure.

3-9

Component Identification

Operating Instructions

129367-408

3.10 Emergency

Door Opening

Procedure

WARNING – BURN HAZARD: Do not attempt to open sterilizer door if a water in chamber alarm condition exists.

This procedure should only be used when pressure remains in the sterilizer chamber, and the door cannot be opened normally because the sterilizer has lost either electrical or water utilities. This emergency door opening procedure can be used to retrieve a load in the chamber. This procedure requires pushing on the door cover to retract the door seal into the groove, then pushing the door downward manually.

Procedure:

1.Swing open the access panel of the sterilizer. Open the emergency exhaust hand valve until chamber exhausts to 0.0 psig. See Figure 3-11.

2.Using the door release tool provided, press on the upper left hand and right hand corners of the chamber door (see Fig. 3-11). The door should give inward slightly, indicating that the seal has been pushed into the groove. The door must “bottom out” against the metal end-frame of the sterilizer chamber.

3.Close the access panel of the sterilizer.

4.Press down on the door handle to lower the door. The door will slide stiffly, so be prepared to press down hard.

5.Once the door is open, do not use the sterilizer until the unit has been examined by a qualified service technician. Further use without attention may damage the sterilizer.

6.Close the emergency exhaust valve.

Figure 3-11. Emergency Door Opening Procedure

3-10

129367-408

Operating Instructions

Component Identification

3.11 Optional

Electric Steam

Generator

CAUTION – POSSIBLE EQUIPMENT DAMAGE: Failure to flush generator on a daily basis could result in generator malfunction.

Pressing STOP TIMER stops flush phase and resets timer to three minutes.

Pressing CANCEL bypasses flush phase and advances display to screen #1. Do not press CANCEL unless generator has already been flushed that day.

WARNING – BURN HAZARD:Beforedailyflushing of the generator, generator must be at zero psig and cooled to room temperature.

CAUTION – POSSIBLE EQUIPMENT DAMAGE: Beforeflushinggenerator, ensure generator drain valve is fully open.

If a building steam source is not available, the sterilizer may be equipped with an electric steam generator. The generator automatically converts water to steam using electric heat. The steam created is then used to power the sterilizer.

Steam generators are highly susceptible to mineral scaling if the supplied water has any level of hardness. Refer to Table 3-1 for water quality requirements.

IMPORTANT: Regardless of the hardness level of supplied water, the generator must be flushed every day before use to prevent mineral scaling or carryover of debris into the chamber.

ATTENTION: Warranty on this steam generator will be voided unless daily flushing procedures are performed.

Daily Generator Start Up Procedure

1.Press the ON button on the sterilizer touch screen (screen #0). Display advances to screen #72. Instructions on how to flush the generator are listed on screen #72.

72

FLUSH GENERATOR

THE GENERATOR SHOULD BE FLUSHED

EVERY DAY.

TO FLUSH GENERATOR:

1.VERIFY GENERATOR PRESSURE IS 0 psig.

2.OPEN GENERATOR MANUAL DRAIN VALVE.

3.PRESS START TIMER TO BEGIN FLUSH PHASE.

4.ALLOW GENERATOR TO FLUSH FOR 5 MINUTES.

FLUSH TIMER: 5:00

	START	STOP	CANCEL
	TIMER	TIMER

2.Check generator pressure gauge (see Fig. 3-12). Generator must be at 0.0 psig and room temperature before flushing.

Water Supply Valve to
the Generator	Generator Pressure Gauge

Water-level

Sight Glass

Generator Electric Box

Generator Drain Valve

Figure 3-12. Optional Steam Generator

3-11

Component Identification

Operating Instructions

129367-408

WARNING – BURNHAZARD: Sterilizeroperatormaybeseverelyburnedbyscaldingwater if the water level control malfunctions.Thesteamgenerator level control may malfunction if the supply water exceeds 26,00 ohms/cm (38.5 micromhos conductivity min.). Do not connect to treated water (e.g., distilled, reverse osmosis, deionized) unless water resistivity is determined to be acceptable. If water exceeds 26,000 ohms/ cm,contactSTERISforinformationconcerningmodifications required to the generator control system.

3-12

NOTE: If generator is not at 0.0 psi, the Flush can be bypassed by pressing CANCEL, however the flush should not be bypassed on a continuous basis or else damage to the generator may occur. Failure to flush the generator on a daily basis will void the generator warranty.

To ensure generator is at 0.0 psig the sterilizer can be shut off at end of the day and by next morning the unit will be able to be flushed. Approximately seven hours are required for generator to cool down to less than 140°F.

3.Open drain valve on the side of the generator electric box (see Fig. 3-12).

4.Verify that the water supply valve to the sterilizer is open.

5.Ensure the water supply valve to the generator is open (see Fig. 3-12).

6.Press START TIMER on screen #72. Water automatically flushes through the generator and out the drain for 3.0 minutes. Flush timer on screen #72 counts down time remaining in the flush phase.

7.After 5.0 minutes, alarm buzzer sounds and display advances to screen #73. Instructions on how to restart the generator are listed on screen #73.

73

FLUSHING OF GENERATOR COMPLETE

TO RESTART GENERATOR:

1.CLOSE GENERATOR MANUAL DRAIN VALVE.

2.PRESS CONTINUE TO START THE GENERATOR AND ADVANCE TO THE MAIN MENU.

CONTINUE

8.Close the generator drain valve.

9.PressCONTINUE onscreen#73.Generatorautomaticallyfillstotheproper level and starts to heat. Display screen advances to the Main Menu screen (#1). Allow ten minutes warm-up time once generator starts to fill.

10. Close front cabinet panel.

NOTE: The generator must be flushed every day before use.

Table 3-1. Required Feed Water Quality for

Carbon Steel Steam Generators

	Nominal		Maximum
Condition	Conditions		Conditions
Temperature	as supplied		140° F (60° C)
Total Hardness as CaCO3*	0-17 mg/L		130 mg/L
Total Dissolved Solids	50-150	mg/L	250 mg/L
Total Alkalinity as CaCO3	50-100	mg/L	180 mg/L
pH	6.8-7.5		6.5-8.5
Total Silica	0.1-1.0	mg/L	2.5 mg/L
Resistivity - ohms/cm	2000-6000		26000

*17.1 mg/L = 1 grain hardness

129367-408

Operating Instructions

Component Identification

STERILIZER OPERATION

4

4.1 Before

Operating the

Sterilizer

WARNING – BURN HAZARD: Sterilizer, rack/ shelves, and loading car will be hot after cycle is run. Always wear protective gloves and apron when removing a processed load. Protective gloves and apron must be worn when reloading sterilizer following the previous operation.

WARNING – SLIPPING HAZARD: To prevent falls keep floors dry by immediately wiping up any spilled liquids or condensation in sterilizer loading or unloading area.

Sterilizer Operation

Operate sterilizer by referring to the appropriate cycle description in this section. The steps described on the next three pages are general instructions that apply to all cycle operations.

1.Press ON touch screen pad on the sterilizer control display.

• The printer records the time and date that the power is turned ON.

2.Open chamber door

a.Check that drain strainer is clean and in place and that chamber interior is clean. See ROUTINE MAINTENANCE MANUAL

(P129367-410) if cleaning is necessary.

b.Close chamber door.

3.Open access door on the operating end of the sterilizer — refer to Figure 4-1. Turn on steam (Fig. 4-1a) and water (Fig. 4-1b) supplies. Close access door.

• Steam enters jacket and begins to warm chamber.

4.Open control access door.

		Control
	Access	Access
Open	Panel	Door
	Steam
Closed	Supply
	Valve
	(4-1a)
	JACKET
CHAMBER

4-1a Steam Supply Valve

Open

Closed

4-1b Water Supply Valve

Figure 4-1. Steam Valves

Operating Instructions

Water Supply Valve (4-1b)

4-1

129367-408