IFU Steris Century Steam Sterilizers P129367410_AE.pdf

P129367410 Revision AEen

AMSCO® Century® Series Sterilizers Routine Maintenance

Operator Manual ii P129367410_AE AMSCO® Century® Series Sterilizers Operator Manual

© 2025 STERIS. All rights reserved.

Published: 2025-2-17 iii Operator Manual AMSCO® Century® Series Sterilizers P129367410_AE

A Word from STERIS

Introduction 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.

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

This sterilizer is not designed to process flammable compounds. Any alteration of the sterilizer which affects its operation will void the warranty, could adversely affect sterilization efficacy, could violate federal, state and local regulations, and jeopardize your insurance coverage.

Service Information 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.

Addresses

The base language of this document is ENGLISH. Any translations must be made from the base language document.

Manufactured by:

STERIS Mexico, S. de R.L. de C.V.

Avenida Avante 790 Parque Industrial Guadalupe Guadalupe, Nuevo Leon, Mexico C.P. 67190

Sales and Service:

STERIS Corporation 5960 Heisley Road Mentor, Ohio 44060 440-354-2600 • 800-444-9009

The base language of this document is ENGLISH. Any translations must be made from the base language document.

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TABLE OF CONTENTS

Section Number Description Page

1 Safety Precautions

1.1 WARNING – PERSONAL INJURY AND/OR EQUIPMENT DAMAGE HAZARD

1.2 WARNING – PERSONAL INJURY HAZARD

1.3 WARNING – EXPLOSION HAZARD

1.4 WARNING – BURN HAZARD

1.5 WARNING – ELECTRIC SHOCK AND BURN HAZARD

1.6 WARNING – SLIPPING HAZARD

1.7 WARNING – STERILITY ASSURANCE HAZARD

1.8 CAUTION – POSSIBLE EQUIPMENT DAMAGE

2 Installation Verification

2.1 General

2.2 Installation Checklist

2.3 Emergency Stop Switch

2.4 Front Access Panel Key Latch

3 Preventive Maintenance

3.1 Introduction

3.2 Flush Optional Electric Steam Generator

3.3 Materials Required

3.4 Safety Considerations

3.5 Drain Strainer Routine Cleaning Procedure

3.6 Drain Routine Cleaning Procedure

3.7 Chamber Routine Cleaning Procedure

3.8 Loading Equipment Cleaning Procedure

3.9 Change Printer Paper Roll

3.10 Change Printer Ink Cartridge

3.11 Replace Door Seal

4 Service Procedures

4.1 Introduction – Service Procedures

4.2 Air Filter Replacement

4.3 Clean Strainers

4.4 Steam Trap Replacement

4.5 Valves

5 Troubleshooting

5.1 General

5.2 Aborts But No Alarm

5.3 ADC Failure

5.4 Atmospheric Pressure

5.5 Board Over Temperature Failure

5.6 Chamber Pressure Transducer Failure

5.7 Chamber Pressure/Temperature Failure

5.8 Chamber Temperature Probe Failure

5.9 Bowie-Dick Test Failed

5.10 Display Issues

5.11 Door A Seal Switch Failure PS1

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5.12 Door Switch Failure

5.13 Door Unsealed (OE door) or Door Unsealed B (NOE door)

5.14 Emergency Stop Pressed

5.15 Exhaust Rate Too Fast

5.16 Exhaust Rate Too Slow

5.17 Generator — All elements have short life

5.18 Generator — Control Power Is OFF

5.19 Generator – Failure to Build Pressure

5.20 Generator — Heater element has open circuit

5.21 Generator — Heater element has developed a ground fault

5.22 Generator — Heater gasket leaks after a short period of operation

5.23 Generator — Steam generation does not work

5.24 Generator — Pump noisy

5.25 Generator — Pump starts (power) but does not run or fill

5.26 Generator — Steam generator is flooded

5.27 Generator — Steam pressure fluctuates dramatically under load

5.28 Generator — Threaded connection leak over time

5.29 Generator — View ports empty. Generator functioning normally

5.30 Generator — No water in view ports. Pump does not start

5.31 Generator – Water leakage at heater flange

5.32 Generator — Water leakage at heater element to flange junction

5.33 Generator - Water Level Control Issue

5.34 I/O Board #1 Failure

5.35 I/O Board Communication Failure

5.36 Jacket Temperature Probe Failure

5.37 Leak Rate Test

5.38 Load Temperature Probe Failure

5.39 Over Sterilize Temperature * Over Temp

5.40 Pressure in Chamber

5.41 Printer Issues

5.42 Power Failure

5.43 Random Access Memory (RAM) Failure

5.44 Read Only Memory (ROM) Failure

5.45 Real Time Clock (RTC) Failure

5.46 Recorder Deviation

5.47 Reference Drain Deviation

5.48 Relay #1 Failure

5.49 Relay #2 Failure

5.50 Relay #3 Failure

5.51 Steam Leak/Dislocated Seal with Door Open

5.52 Testing Memory Appears on Screen and Does Not Clear

5.53 Too Long in Air Break

5.54 Too Long in Charge

5.55 Too Long in Evacuation

5.56 Too Long in Exhaust

5.57 Too Long in Jacket Charge

5.58 Too Long In Sterilize

5.59 Too Long to Close Door

5.60 Too Long to Open Door

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5.61 Too Long to Seal Door

5.62 Too Long to Unseal Door

5.63 Under Sterilize Temperature

5.64 Waste Temperature Probe Failure

5.65 Water in Chamber

5.66 Wetpacks

1 — Safety Precautions

P129367410_AE AMSCO® Century® Series Sterilizers Operator Manual

Safety Precautions

1.1 WARNING – PERSONAL INJURY AND/OR EQUIPMENT DAMAGE HAZARD

WARNING

PERSONAL INJURY AND/OR EQUIPMENT DAMAGE HAZARD

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.

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.

1.2 WARNING – PERSONAL INJURY HAZARD

WARNING

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.

Door must be locked and the key retained prior to entering chamber for servicing.

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.

1.3 WARNING – EXPLOSION HAZARD

WARNING

WARNING – EXPLOSION HAZARD

This sterilizer is not designed to process flammable compounds.

Operator Manual AMSCO® Century® Series Sterilizers P129367410_AE

1.4 WARNING – BURN HAZARD

WARNING

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.

P129367410_AE AMSCO® Century® Series Sterilizers Operator Manual

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.

1.5 WARNING – ELECTRIC SHOCK AND BURN HAZARD

WARNING

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.)

1.6 WARNING – SLIPPING HAZARD

WARNING

WARNING – SLIPPING HAZARD

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

Operator Manual AMSCO® Century® Series Sterilizers P129367410_AE

1.7 WARNING – STERILITY ASSURANCE HAZARD

WARNING

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.

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.

The Express cycle is only intended for use with a single instrument in a single wrapped instrument tray.

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

The Flash cycle is not intended for processing porous items.

1.8 CAUTION – POSSIBLE EQUIPMENT DAMAGE

CAUTION

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.

P129367410_AE AMSCO® Century® Series Sterilizers Operator Manual

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).

Operator Manual AMSCO® Century® Series Sterilizers P129367410_AE

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.

2 — Installation Verification

P129367410_AE AMSCO® Century® Series Sterilizers Operator Manual

Installation Verification

2.1 General

An Equipment Drawing showing all utility and space requirements was supplied with the sterilizer. Clearance space shown on the drawing is necessary for ease of installation and to assure proper operation and maintenance of equipment. Installation and Uncrating Instructions were also furnished with the sterilizer. If any of these documents are missing or misplaced, contact STERIS giving the Serial, Equipment and Model numbers. Replacement copies will be sent to you promptly.

2.2 Installation Checklist

This section includes the following:

Service Clearance Plumbing Service Electrical Service Sterilizer Final Check Cycle Operation After installing this unit (see Figure 2-1) according to the instructions provided, complete the following checklist to assure that your installation is complete and correct. Or, if you desire, contact STERIS for a technician to be scheduled to test your installation and demonstrate proper equipment operation.

Service Clearance

CAUTION

POSSIBLE EQUIPMENT DAMAGE

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

� Clearance as specified on the Equipment Drawing must be available.

Plumbing Service

CAUTION

POSSIBLE EQUIPMENT DAMAGE

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.

� Feed Water:

� All supply line shutoffs must be provided with lockout capability.

Operator Manual AMSCO® Century® Series Sterilizers P129367410_AE

� Backflow prevention is by others.

� Water Pressure measured (specification is 30 to 50 psig, static and dynamic). Water pressure supplied must be within specifications as shown on the Equipment Drawing. If pressure is too high, a regulator must be installed. If water pressure is too low, equipment performance will be affected; use of a booster pump (by others) is recommended.

� Water Quality supplied must be within specifications. Improper water quality adversely affects equipment operation, especially units equipped with an electric steam generator. Damage to the equipment from improper water quality is not covered under warranty.

� Steam Supply:

� Shutoffs (with provisions for lockout and tag out) located nearby.

� Supply piping adequately sized.

� Supply pressure measured (specification is 50 to 80 psig, static and dynamic).

� Steam Piping to the sterilizer is to be trapped at a point before connection to the sterilizer. Trap is required to remove condensate from the steam line.

� Drain Pipingmust be sloped properly, and sized to handle the maximum waste flow from the sterilizer.

Electrical Service

� All disconnects must be provided with lockout capability.

� 120 VAC, one phase service to the unit must be as specified on the Equipment Drawing.

� 120 VAC, one phase service requires a clearly marked disconnect located near the sterilizer � 120 VAC, one phase service should be on a separate circuit, and not tied into circuits containing large reactive loads

(e.g., motors).

� Three phase power for optional electric steam generators must meet specifications on the Equipment Drawing.

� Three phase service requires a clearly marked disconnect located near the sterilizer.

Sterilizer Final Check

� Door runs up and down smoothly.

� Door open/close time is 7.0-9.0 seconds (power door units).

� Door up switches adjusted correctly.

� Chamber strainer in place.

� Rack and shelves/loading car operates correctly.

� Paper loaded in printer.

Cycle Operation

WARNING

EXPLOSION HAZARD

This sterilizer is not designed to process flammable compounds.

P129367410_AE AMSCO® Century® Series Sterilizers Operator Manual

CAUTION

POSSIBLE EQUIPMENT DAMAGE

Sterilization of chloridecontaining 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.

� Unit powers up correctly � If prevacuum sterilizer, run leak test cycle leak rate is to be less than 1.0 mmHg/minute.

� Verify operation of a typical cycle (e.g., Gravity).

Figure 2-1. Typical AMSCO Century Series Sterilizer

2.3 Emergency Stop Switch

Introduction

An emergency stop switch (Figure 2-2) is a safety feature designed to shut the sterilizer down completely in an emergency situation.

Operator Manual AMSCO® Century® Series Sterilizers P129367410_AE

Pressing the emergency stop switch disconnects power to the door and valves, causing the door to stop and all valves to close.

WARNING

BURN HAZARD

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.

Figure 2-2. Emergency Stop Switch

IMPORTANT: The emergency stop switch is for emergency use only! DO NOT USE AS A START/STOP BUTTON. To properly abort a cycle, press abort button on sterilizer display.

The emergency stop switch should be pressed only in an emergency situation such as

P129367410_AE AMSCO® Century® Series Sterilizers Operator Manual

• Safety mechanism fails to stop door when an obstruction is present

• Steam enters the chamber when the door is open

NOTE: An alarm is generated when the emergency stop switch is pressed. An emergency stop key is required to reset the switch. Refer to alarm procedure to clear alarm.

Emergency Stop Key

An emergency stop key is required to reset the emergency stop switch.

NOTE: The emergency stop key should be retained by the department supervi Resetting the Switch:

1. Insert emergency stop key.

2. Turn emergency stop key counterclockwise.

a. Alarm clears

b. Cycle aborts

c. Sterilizer resumes normal operation

Emergency Stop Guard

The emergency stop guard (Figure 2-2) helps prevent the operator from accidentally pressing the emergency stop switch.

Emergency Stop Label

The emergency stop label is located above the emergency stop switch (see Figure 2-2 and Figure 2-3).

Figure 2-3. Emergency Stop Label

2.4 Front Access Panel Key Latch

The front access panel key latch (see Figure 2-2) locks the front access panel. The key latch helps protect operators from:

• contacting moving door parts during operation

• accessing electrical connections, hot steam pipes and other components that should only be accessed by a qualified service technician or qualified personnel

IMPORTANT: If the front access panel must be unlocked, this service must be performed by trained and qualified personnel.

Unlocking front access panel:

1. Insert front access panel key.

2. Turn key counterclockwise.

3. Turn knob right or left to disengage the latch, and hold.

Operator Manual AMSCO® Century® Series Sterilizers P129367410_AE

4. Pull knob firmly to release the panel from the magnets securing the panel.

Locking front access panel:

1. Close panel.

2. Turn key clockwise.

3 — Preventive Maintenance

P129367410_AE AMSCO® Century® Series Sterilizers Operator Manual

Preventive Maintenance

3.1 Introduction

The following preventive maintenance advisories must be observed:

1. Regular service and maintenance MUST be performed only by STERIS or a STERIS-trained technician. Any work performed by inexperienced or unqualified persons or the installation of unauthorized parts could cause personal injury, invalidate the warranty or result in costly damage.

2. Under no circumstances should this equipment be serviced without the Maintenance Manual. The Maintenance Manual can be purchased by contacting STERIS Customer Service.

3. A detailed Preventive Maintenance schedule and replacement parts list can be found in the Maintenance Manual.

The Maintenance Manual can be purchased by contacting STERIS Customer Service.

4. Preventive Maintenance is essential in keeping this equipment in optimal working condition. STERIS recommends establishing an annual maintenance agreement with STERIS service.

NOTE: Preventive Maintenance is not covered under warranty.

3.2 Flush Optional Electric Steam Generator

CAUTION

POSSIBLE EQUIPMENT DAMAGE

Failure to flush generator on a daily basis could result in generator malfunctions.

Warranty on the generator will be voided unless flushed daily.

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

Before daily flushing of the generator, generator must be at 0.0 psig and cooled to room temperature.

CAUTION

POSSIBLE EQUIPMENT DAMAGE

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

Operator Manual AMSCO® Century® Series Sterilizers P129367410_AE

WARNING

BURN HAZARD

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 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, contact STERIS for information concerning modifications required to the generator control system.

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.

IMPORTANT: Warranty on this steam generator is voided unless daily flushing procedures are performed.

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.

2. Check generator pressure gauge (see Figure 3-1). Generator must be at 0.0 psig and room temperature before flushing.

P129367410_AE AMSCO® Century® Series Sterilizers Operator Manual

Figure 3-1. Optional Steam Generator NOTE: If generator is not at 0.0 psig, 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 occurs.

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 is able to be flushed. Approximately seven hours is required for generator to cool down to less than 140°F (60°C)

3. Open drain valve on the side of the generator electric box (see Figure 3-1).

4. Verify water supply valve to the sterilizer are open.

5. Ensure water supply valve to the generator is open (see Figure 3-1).

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

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

8. Close the generator drain valve.

9. Press CONTINUE on screen #73. Generator automatically fills to the proper level and starts to heat. Display screen advances to the Main Menu screen (#1). Allow 10 minutes warm-up time once generator starts to fill.

10. Close front cabinet panel.

NOTE: The generator must be flushed every day before use

Operator Manual AMSCO® Century® Series Sterilizers P129367410_AE

Table 3-1. Required Feed Water Quality for Carbon Steel Steam Generators

Condition Nominal Conditions Maximum Conditions

Temperature as supplied 140° F (60° C)

Total Hardness as CaCO 3 * 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

180 mg/L 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

3.3 Materials Required

WARNING

PERSONAL INJURY

Personal protective equipment, including heat resistant gloves, heavy rubber gloves, protective gown and face shield or safety goggles are required to perform routine chamber cleaning.

ProlysticaTM HP Neutral Manual Cleaner

STERIS part #1C2708, 1 gal. (4 gallons per case); substitutions are not recommended except as noted in the drain cleaning procedure.

It can be purchased here: https://shop.steris.com/en/us/parts/prolystica-hp-neutral-manual-cleaner-4-x-1-gal-case-1c2708

ChamberCareTM Pro Kit (Item #11047270)

The ChamberCareTM Pro Kit contains the tools you need to perform routine sterilizer chamber cleaning following this IFU. To purchase this kit, contact your local STERIS District Service Manager, Specialty Service Technician, or Equipment Service Technician.

Figure 3-2. ChamberCare Kit https://shop.steris.com/en/us/parts/prolystica-hp-neutral-manual-cleaner-4-x-1-gal-case-1c2708

P129367410_AE AMSCO® Century® Series Sterilizers Operator Manual

Kit Content Includes:

• Chamber Cleaning Pad and Holder Kit

• Chamber Cleaning Brown Heavy Duty Scrub Pad

• Chamber Cleaning White Light Duty Scrub Pad

• Chamber Extension Pole Telescopic

• Chamber Cleaning Pump-Up Sprayer

• Lint Free Microfiber Cloth Pack

• Plastic Chamber Scraping Tool

• Chemistry Dosing Syringe

Alternative Cleaning Supplies

• Prolystica HP Neutral Manual Cleaner #1C2708, 1 gal. (4 per case); substitutions are not recommended except as noted in the drain cleaning procedure

• Hand Pump 1/2 oz #T619Q0, for 1 gal. (sold individually); can be used with Prolysitca HP Neutral Manual Cleaning #1C2708 1 gal. to aid in dosing chemistry

• Pump-up sprayer to mix chemistry with water and for rinsing the chamber

• 10 mL chemistry dosing syringe used for mixing

• Scrub pad and holder kit with additional scrub pads

• Soft lint-free cloths and/or a soft brush suitable for attaching to a mop extension handle

• Plastic scraping tool

• Mop extension handle with a clamping mechanism on the end (available through hospital suppliers or hardware stores)

• Personal protective equipment, including heat resistant gloves, heavy rubber gloves, protective gown and face shield or safety goggles

3.4 Safety Considerations

The following considerations should be observed before proceeding with the cleaning procedure:

• Be sure to follow facility policy and STERIS Operator Manual procedures to turn off sterilizer power and to not turn on the unit while the equipment is being cleaned.

• Open the sterilizer door and allow the sterilizer to cool completely before cleaning. This takes approximately 4-5 hours.

• Use appropriate personal protective equipment, including heavy rubber gloves, protective gown and safety goggles or face shield to prevent contact with the chemical solutions.

• When spraying the diluted ProlysticaTM HP Neutral Manual Cleaner into the sterilizer, use a coarse sprayer that does not produce a fine mist.

• Prior to using Prolystica HP Neutral Manual Cleaner, review all warnings and cautions on the product label.

• In addition to the safety considerations outlined in this document, follow all safety protocols outlined within the facility’s safety procedures.

Operator Manual AMSCO® Century® Series Sterilizers P129367410_AE

3.5 Drain Strainer Routine Cleaning Procedure

WARNING

PERSONAL INJURY

Personal protective equipment, including heat resistant gloves, heavy rubber gloves, protective gown and face shield or safety goggles are required to perform routine chamber cleaning.

Drain Strainer Cleaning Frequency

The chamber drain strainer should be cleaned at least once a day, preferably in the morning before running the first cycle and whenever the strainer is clogged with debris.

Figure 3-3. AMSCO 400 Med Sterilizer Drain and Strainer

P129367410_AE AMSCO® Century® Series Sterilizers Operator Manual

Figure 3-4. AMSCO 600 Med Sterilizer Drain and Strainer

NOTE: Review operator manual for more information about how to properly remove and clean the drain strainer.

Daily Drain Strainer Cleaning Procedure

1. Wear heat-protective gloves prior to cleaning the chamber drain strainer, unless the sterilizer is cool.

2. Remove the strainer following instructions provided in the operator manual.

3. Remove obvious debris from strainer and use a brush, wire, or similar tool to remove any remaining accumulation

4. Once strainer has been cleared, position the strainer upside down and under running water.

5. Replace the strainer in the chamber drain.

3.6 Drain Routine Cleaning Procedure

WARNING

PERSONAL INJURY

Personal protective equipment, including heat resistant gloves, heavy rubber gloves, protective gown and face shield or safety goggles are required to perform routine chamber cleaning.

Drain Cleaning Frequency

• If liquids such as microbiology media are processed in the sterilizer on a regular basis, the chamber drain should be cleaned once a week.

Operator Manual AMSCO® Century® Series Sterilizers P129367410_AE

• Drain should also be cleaned following chamber cleaning to remove any debris resulting from the cleaning process.

• Drain should be cleaned whenever it becomes clogged.

Drain Cleaning Procedure

1. Make sure to follow facility policy and STERIS Operator Manual procedures to turn off sterilizer power and to not turn on the unit while the equipment is being cleaned.

2. Open the sterilizer door and allow the sterilizer to cool (approximately 4-5 hours).

3. Remove the chamber drain strainer and clean using the procedure above if necessary.

4. To clean the chamber drain, measure 1-2 ounces (60 mL) of full-strength Prolystica™ HP Neutral Manual Cleaner into a metal medicine cup and pour the solution slowly down the sterilizer drain.

NOTE: If Prolystica HP Neutral Manual Cleaner is unavailable, a hot solution of 1 tablespoon (10.8g) of trisodium phosphate to 1 pint (500 ml) of hot water may be used.

5. After five minutes, pour approximately 1 pint (500 mL) of hot tap water down drain to rinse out Prolystica HP Neutral Manual Cleaner.

NOTE: Tap water may puddle on the bottom of the chamber. This is normal and should drain completely after 10 minutes. If the water does not drain completely, it may be necessary to turn the unit on, initiate a cycle, wait 10 seconds, and immediately abort it. The cycle/abort action opens the sterilizer drain, draining the water from the chamber.

CAUTION

TAP WATER NOT DRAINING

If water does not drain after first attempt, take the following actions:

● Turn off unit and its power supply.

● Contact STERIS Service to allow a STERIS Technician to assess the issue.

● Do not reattempt to initiate a cycle and abort a second time.

6. Thoroughly rinse bottom of chamber with water to prevent detergent residue from baking on chamber surface.

7. Reinstall Chamber Drain Strainer.

3.7 Chamber Routine Cleaning Procedure

WARNING

PERSONAL INJURY

Personal protective equipment, including heat resistant gloves, heavy rubber gloves, protective gown and face shield or safety goggles are required to perform routine chamber cleaning.

Chamber Cleaning Frequency

Due to differences in water quality, steam quality, frequency of use and boiler additives, no specific frequency interval is recommended for chamber cleaning. Operators must determine the appropriate cleaning interval based on the local water conditions and chamber appearance.

In general, chamber cleaning should be performed under the following circumstances:

• When spills or other soiling have occurred

P129367410_AE AMSCO® Century® Series Sterilizers Operator Manual

• Routinely to maintain sterilizer cleanliness and appearance

• When processing materials that may be detrimental to the chamber NOTE: Routine Chamber Cleaning conducted by equipment operators does not replace the STERIS-recommended annual professional cleaning.

Chamber Cleaning Procedure

1. Make sure to follow facility policy and STERIS Operator Manual procedures to turn off sterilizer power and to not turn on the unit while the equipment is being cleaned.

Figure 3-5. Power Down Unit

2. Open the sterilizer door and allow the sterilizer to cool (approximately 4-5 hours).

3. Remove the chamber rack and shelves according to instructions found in the operator manual if applicable.

4. Put on heavy rubber gloves, a protective gown and a face shield or safety goggles. Additionally, follow your facility’s safety procedures at all times.

Figure 3-6. Required PPE for Cleaning

5. Prepare a solution of ProlysticaTM HP Neutral Manual Cleaner and hot water (~approximately 50°C) in the

Chamber Cleaning Pump-Up Sprayer container found in the ChamberCareTM Pro Kit by diluting ½ oz/gal which is

5.85 mL to the 1500 mL capacity of the pump-up sprayer. Use the dosing syringe to add the Prolystica to the hot water in the sprayer.

Operator Manual AMSCO® Century® Series Sterilizers P129367410_AE

6. Using a coarse spray pattern to avoid creating a fine mist, evenly apply the solution to the inside surfaces of the sterilizer chamber, including the inside surface of the door.

7. Place the coarse brown pad onto the telescopic extension pole and use it to scrub the entire chamber surface.

8. Spray the chamber walls with the diluted cleaning solution again.

Figure 3-7. Spray Chamber with Diluted Cleaning Solution

9. Replace the brown coarse pad with the white pad and scrub the entire chamber surface once more.

10. Empty the pump-up sprayer and rinse it with tap water once you are done scrubbing down the surface.

11. Fill the pump-up spray bottle with tepid tap water.

12. Flush sterilizer chamber surfaces and inside of the sterilizer door thoroughly at least two times with tap water.

Make sure to eliminate all detergent residue. If not removed, detergent residue may become visible upon heating of the chamber and may cause damage to the chamber surface.

13. Take a lint-free microfiber cloth, place it on the end of the telescopic extension pole, and wipe down the sterilizer chamber walls. You may need to use a few microfiber cloths to achieve the desired dry and clean look.

14. Refill the pump-up sprayer container with more tap water if necessary to ensure proper rinsing. Spray thoroughly to remove all residual chemistry from the chamber. If it is not removed, there is a potential for detergent residue to be visible on the chamber wall when you run your next full cycle.

NOTE: Tap water may puddle on the bottom of the chamber. This is normal and should drain completely after 10 minutes. If the water does not drain completely, it may be necessary to turn the unit on, initiate a cycle, wait 10 seconds, and immediately abort it. The cycle/abort action opens the sterilizer drain, draining the water from the chamber.

CAUTION

TAP WATER NOT DRAINING

If water does not drain after first attempt, take the following action:

● Turn off the unit and its power supply.

● Contact STERIS Service to allow a STERIS Technician to assess the issue.

● Do not reattempt to initiate a cycle and abort a second time.

15. Drain strainer should also be cleaned following chamber cleaning to remove any debris resulting from the cleaning process. Refer to Section 3.5, Drain Strainer Routine Cleaning Procedure.

16. Replace the sterilizer rack and shelves, if applicable, using the reverse of the removal procedure.

P129367410_AE AMSCO® Century® Series Sterilizers Operator Manual

17. Return the unit to operation.

18. Run a Warm-up Cycle, followed by a DART® Air Removal Test Cycle for flushing and testing purposes.

19. Clean up the area you are working in and put all supplies back into the ChamberCareTM Pro Kit box.

20. Rinse the pump-up sprayer thoroughly.

21. Empty the water from the pump-up sprayer used for rinsing and store containers in a manner that promotes drying until needed for further use.

3.8 Loading Equipment Cleaning Procedure

1. Spray the loading car and transfer carriage with diluted ProlysticaTM HP Neutral Manual Cleaner cleaning solution and remove any soil with a damp cloth.

2. Rinse thoroughly with water and dry with a lint free cloth.

3. For rack and shelves, remove rack and shelves according to instructions in the sterilizer operator manual and place in a large sink.

4. Using the sprayer, apply diluted Prolystica HP Neutral Manual Cleaner to the surface and with a dampened cloth remove any soil.

5. Rinse thoroughly using tap water and dry with a soft, lint-free cloth.

6. Replace the sterilizer rack and shelves using the reverse of the removal procedure.

3.9 Change Printer Paper Roll

The printer paper roll should be changed whenever a colored stripe is visible on one or both edges of the printout paper.

1. Tear paper between take-up spool and printer.

2. Remove take-up spool from drive by inserting fingers in cavity as shown and pushing spool to the right.

Operator Manual AMSCO® Century® Series Sterilizers P129367410_AE

3. Pull off right end of spool and remove used paper roll from spindle.

4. Open access door and remove old paper roll, gently pulling any remaining tape up and out of printer.

5. Insert new paper roll.

P129367410_AE AMSCO® Century® Series Sterilizers Operator Manual

6. Insert end of paper into printer slot just behind ink cartridge.

7. Press PAPER FEED touch screen pad on display until paper advances through printer and ink cartridge, exiting the front.

Operator Manual AMSCO® Century® Series Sterilizers P129367410_AE

8. Continue pressing PAPER FEED (or pull tape gently) until about 18" (457 mm) of paper hangs out of printer. Insert end of paper into slot of take-up spool, then replace right end of spool.

9. Rotate spool in direction shown until paper is secure.

P129367410_AE AMSCO® Century® Series Sterilizers Operator Manual

10. Reinstall take-up spool on magnetic idler. Manually roll up slack paper.

3.10 Change Printer Ink Cartridge

The printer ink cartridge should be changed as soon as the type on printouts is light or faded, and before printouts become difficult to read.

1. Tear paper between take-up spool and printer.

Operator Manual AMSCO® Century® Series Sterilizers P129367410_AE

2. Open access door, then press on right end of ink cartridge, until left end of cartridge pops out of the printer.

3. Slip cartridge off end of paper tape, slip new cartridge over tape in the same way as before, making sure paper tape slides between ink cartridge housing and ink ribbon.

P129367410_AE AMSCO® Century® Series Sterilizers Operator Manual

4. Install left end of cartridge first, then push right end in as shown, snapping it into place.

5. Retighten ribbon by rotating wheel on left side of cartridge 1/4 turn. Then refer to Section 3.9, Change Printer Paper Roll to reinstall take-up spool.

3.11 Replace Door Seal

If the door seal requires replacement, perform the following:

1. Use a tongue depressor or similar non-metal tool to pry and twist one section of the seal from the groove. Refer to Figure 3-8.

2. Grasp the raised section of the seal and pull the remainder from the end-ring groove.

3. Examine the end ring groove for debris or residue. Clean if necessary.

4. Install new seal as follows:

NOTE:When replacing the door seal, note the following

a. Ensure date information molded into rear of seal (refer to Figure 3-9) is at the bottom of the groove.

b. Reference indicators are located inside the rear groove of door seal, at the middle of each side (refer to

Figure 3-9).

• Do not use a sharp instrument to install the seal.

• Do not stretch the seal.

Operator Manual AMSCO® Century® Series Sterilizers P129367410_AE

i. Align right and left reference indicators with the screws attaching the end frame to the support stand, align top and bottom indicators with the ports in the top and bottom of the end ring frame.

ii. Press seal in at each reference point with fingertips.

iii. Press remainder of the seal into end-ring groove, starting at the corners.

5. Test installation.

a. Attempt to close the door. If the door jams or sticks at any point in its travel check to ensure the seal has been fully pressed into the groove.

b. Run a shortened test cycle to determine if the door seals adequately. If steam leaks from around the door or the seal, abort the cycle and examine the seal to ensure it has been properly seated in the end-ring groove. Once re-seated, run another test cycle. If the door fails to seal following the second test, another problem may exist. Contact your supervisor before using the sterilizer further.

c. At the end of cycle, ensure seal has retracted fully into the groove.

Figure 3-8. Remove Door Seal

Figure 3-9. Location of Seal Date Information and Reference Indicators

4— Service Procedures

Operator Manual AMSCO® Century® Series Sterilizers P129367410_AE

Service Procedures

4.1 Introduction – Service Procedures

WARNING

BURN HAZARD

Before performing any cleaning or maintenance procedures, allow sterilizer, generator (if applicable) and accessories to cool to room temperature.

CAUTION

POSSIBLE EQUIPMENT DAMAGE

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.

The material in this section of the manual is provided to allow for servicing components of the sterilizer most likely to need attention. These procedures are more advance than cleaning and replacing expendables (such as printer paper and door seals). These procedures should always be performed by an experienced, trained service technician.

4.2 Air Filter Replacement

Refer to Figure 4-1 for location.

The purpose of the bacterial air filter is to filter incoming air. The system is exposed to contamination whenever the filter or the air lines below the filter are opened. Keep these components as clean as possible when servicing. The bacterial air filter contains a replaceable filter cartridge.

1. Remove bowl from filter body by loosening retaining nut.

2. Remove the old filter element and discard.

3. Insert new filter element into the bowl.

4. Replace bowl and tighten retaining nut.

4.3 Clean Strainers

WARNING

BURN HAZARD

Failure to shut off the steam supply when cleaning or replacing strainers can result in serious injury.

Refer to Figure 4-1 for location of strainers.

P129367410_AE AMSCO® Century® Series Sterilizers Operator Manual

The strainers should be opened for cleaning after initial start-up and at least twice a year thereafter. Accumulation of sediment and rust reduces pressure and flow. In extreme conditions, blockage may occur.

• Disassembly

Shut off supply and vent pressure in line by running a short sterilizer cycle. Abort the cycle when no pressure is present in the steam or water lines.

1. Shut off water and steam supplies.

2. Remove hex plug and gasket.

3. Pull strainer and screen from body.

4. Scrape and polish all rust and residue from strainer screen and body. Use a wire brush or steel wool. Ensure all perforations are clear by poking open with a wire. Replace screen if damaged, rusted or corroded.

Figure 4-1. Serviceable Components

• Reassembly

Operator Manual AMSCO® Century® Series Sterilizers P129367410_AE

1. Insert screen into strainer body. Take care that no dirt or other particles remain in strainer body.

2. Replace and tighten hex plug. Use a new gasket if necessary.

3. Ensure all pipe connections are tight after assembly.

4.4 Steam Trap Replacement

WARNING

BURN HAZARD

Before performing any cleaning allow sterilizer and generator (if applicable) to cool to room temperature.

Jacket pressure must be at 0.0 psig before beginning work on the steam trap.

CAUTION

POSSIBLE EQUIPMENT DAMAGE

Allow thermostatic traps to cool 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.

Refer to Figure 4-1 for location.

• Disassembly

1. Using a suitable wrench, unscrew and remove cap and attached diaphragm assembly.

2. Remove seat from body using a hex socket wrench.

3. Wipe out bowl taking care that loose material does not enter the piping.

• Reassembly

1. Screw new seat in firmly. (Use a socket head wrench to tighten.)

NOTE: Seat and diaphragm are a lapped pair.

2. Install new diaphragm.

3. Replace cap and attached diaphragm assembly, using a new gasket.

4. Check for leaks.

4.5 Valves

This section includes the following:

Clean or Replace Piping Check Valves Clean or Replace Manifold Check Valves Rebuild Manifold Solenoid Valves Safety Valve Test Pressure Regulating Valve Adjustment

P129367410_AE AMSCO® Century® Series Sterilizers Operator Manual

Clean or Replace Piping Check Valves

Repair of check valves is limited to cleaning of valve seats and/or replacing seal rings when foreign matter causes improper operation. When a valve becomes defective, the entire valve must be replaced or repaired with the appropriate Seal Kit. Refer to Illustrated Parts Breakdown in Maintenance Manual (P764326797) for correct check valve part number.

Clean or Replace Manifold Check Valves

Repair of check valves is limited to cleaning valve seats when foreign matter causes improper operation. If the seat itself is damaged, the valve can be repaired according to the instructions in the Manifold Repair Kit. Refer to ILLUSTRATED PARTS BREAKDOWN in Maintenance Manual (P764326797) for correct Manifold Repair Kit part number.

Rebuild Manifold Solenoid Valves

Solenoid valves can be rebuilt following the instructions included in the manifold repair kit. Refer to ILLUSTRATED PARTS BREAKDOWN in Maintenance Manual (P764326797) for correct Manifold Repair Kit part number.

Safety Valve Test

WARNING

BURN HAZARD

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

CAUTION

POSSIBLE EQUIPMENT DAMAGE

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.

The safety valve is to be tested periodically. This procedure can also be used test the optional integral steam generator's safety valve (if applicable).

• Prevent damage during testing by ensuring at least 75% of rated pressure is in the chamber. Check current pressure level by observing chamber pressure gauge (located behind front access door).

• Open try lever and hold valve open for one to two seconds

• Allow try lever to snap shut.

Pressure Regulating Valve Adjustment

Any adjustments to this valve should be performed by a qualified service technician. Improper adjustments to this valve may result in inadequate sterilizer operation.

5— Troubleshooting

Operator Manual AMSCO® Century® Series Sterilizers P129367410_AE

Troubleshooting

5.1 General

WARNING

PERSONAL INJURY AND/OR EQUIPMENT DAMAGE HAZARD

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

ELECTRIC SHOCK HAZARD

Disconnect all utilities to sterilizer before servicing..

WARNING

BEFORE PERFORMING ANY CLEANING OR MAINTENANCE PROCEDURES, ALLOW STERILIZER

AND GENERATOR (IF APPLICABLE) TO COOL TO ROOM TEMPERATURE.

This section describes all the possible alarm conditions which may occur when operating the sterilizer.

If a problem occurs not described in this section, contact STERIS. A trained service technician will promptly place your sterilizer in proper working condition.

NOTE: Never permit unqualified persons to service the…