HARVEY Chemiclave EC5500 Service Manual
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HARVEY Chemiclave EC5500 Service Manual

Chemiclave ec series
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B
T
C
ARNSTEAD
HERMOLYNE
ORPORATION
Harvey
®
Chemiclave
EC Series Sterilizers
SERVICE MANUAL
LT1121X2 • 11/13/00
1

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Summary of Contents for HARVEY Chemiclave EC5500

  • Page 1 ARNSTEAD HERMOLYNE ORPORATION Harvey ® Chemiclave EC Series Sterilizers SERVICE MANUAL LT1121X2 • 11/13/00...

  • Page 2: Table Of Contents

    Table of Contents Introduction ................................. 4 General Specifications ..............................5 General Description ..............................6 Controls and Features ............................... 6 Power Switch ................................6 Control Panel ................................6 Chemi-Filter ................................8 Door ..................................8 Drain ..................................8 Pressure Relief Valve .............................. 8 Piping Components ..............................
  • Page 3 ABLE OF ONTENTS Pressure Gauge ..............................33 Pressure Relief Valve ............................33 Condenser ................................34 Condensate Tank ..............................34 Door ..................................34 Purge Pump ................................35 Air Filter ................................. 36 Check Valve ................................36 Electrical Components ............................36 Fuses ..................................36 Printed Circuit Boards (PCBs) ..........................

  • Page 4: Introduction

    Introduction The Harvey Chemiclave sterilizer is a safe, fast and ® effective sterilizer for use in medical and dental offices, Note hospitals, clinics and other health care facilities. To save space, most figures in this manual show only one of the models.

  • Page 5: General Specifications

    General Specifications " 5 " 3 " 5 " 8 " 5 ° ° ) F i l e t i c . l f . l f . l f " 5 " 5 " 5 " 0 " 6 °...

  • Page 6: General Description

    General Description Controls and Features Power Switch The power switch on the front of the sterilizer turns power to the sterilizer ON (I) or OFF (O). See Figure 1. Control Panel Pressure Gauge Displays the chamber pressure. See Figure 2. Timer Times the 20 minute exposure phase and the purge phase for models EC5500 and EC6000.
  • Page 7 ENERAL ESCRIPTION Sterilant Level Switch Chemi-filter Pressure Relief Valve Baffle Plate Pressure Filling Air filter Switch Reservoir From Pump Filter Housing Condenser Exhaust to Condensate Chemi-filter Tank Exhaust to Chemi-filter Drain Metering Valve Door Cover Door Power Handle Cord Door Door Main fuse Latch...

  • Page 8: Chemi-Filter

    Reservoir The reservoir holds about 1 liter of Vapo-Steril solution (see Caution Be sure you are using only Harvey “Technical Specifications” for exact amounts). The filling Vapo-Steril solution. Other solutions will cup has a spring-loaded valve. When the reservoir is full, cause damage to the Chemiclave and the valve stops the flow of solution from the filling bottle.

  • Page 9: Chamber

    ENERAL ESCRIPTION With the control knob at DEPRESSURIZE, Vapo-Steril can enter through the fill port and fill the shot chamber, while the chamber itself connects through the exhaust port to the exhaust line. With the control knob at PRESSURIZE, the fill port and exhaust port are closed.

  • Page 10: Exhaust

    ENERAL ESCRIPTION Exhaust Vapors from the chamber that do not liquefy in the con- denser proceed to the exhaust connection on the filter housing. They exit through the Chemi-Filter into the atmo- sphere. Chemi-Filter The Chemi-Filter traps the formaldehyde from the exhaust vapors before releasing them to the atmosphere.

  • Page 11: Power Cord

    ENERAL ESCRIPTION Display Control Board Contains logic circuits and display components, including the timer and the buzzer. • Timer: On Display/Control Board. Counts to time the exposure and purge phases. For the exposure phase, the timer operates only if the valve shaft switch is closed and the pressure switch is closed.

  • Page 12: Overtemp Switch

    ENERAL ESCRIPTION Overtemp Switch Opens to cut power to the heaters if chamber temperature reaches (163°C ± 4) 325°F. Overtemp switch has to be manually reset. Valve Shaft Switch Engaged by the cam on the valve shaft, this switch is closed only when the control knob is set to PRESSURIZE.

  • Page 13: Principles Of Operation

    Power On Control knob is set to DEPRESSURIZE before turning Caution Use only harvey Vapo-Steril solution in the power ON. This vents any sterilant vapors into the the Chemiclave. Do not dilute, alter or condensate tank. Electrical power is applied to the unit otherwise change Vapo-Steril in any when POWER switch is turned ON.

  • Page 14: Exposure

    RINCIPLES OF PERATION Exposure This timed function begins when chamber pressure reaches 20 psig (138 kPa). Pressure switch is then energized. The timer counts down the exposure time of 20 minutes. The decimal point flashes when the timer is active. Chamber pressure is displayed continually on the pressure gauge.
  • Page 15 RINCIPLES OF PERATION Figure 4: Metering Valve Function...
  • Page 16 RINCIPLES OF PERATION Figure 5: Warm-Up Figure 6: Ready/Load Figure 7: Pressurization...
  • Page 17 RINCIPLES OF PERATION Figure 8: EC5500/EC6000 Operation...
  • Page 18 RINCIPLES OF PERATION Figure 9: Exposure Figure 10: Purge Figure 11: End/Unload...
  • Page 19 RINCIPLES OF PERATION Check Valve Condenser Thermostat See Det. “B” Heater Leads (2 - 230V/100V, 3-115V) Pressure Gauge MV Bracket Metering Valve (MV) Valve Shaft MV to condenser Spill Valve Shaft Display Shield Switch control board Control Power Knob Supply Power Board Switch...
  • Page 20 RINCIPLES OF PERATION Figure 13: Piping Schematic...
  • Page 21 RINCIPLES OF PERATION Figure 14: Cycle Phase Diagram...
  • Page 22 RINCIPLES OF PERATION Door Gasket Figure 15: Exploded View - Top Cover and Door...
  • Page 23 RINCIPLES OF PERATION Pressure Switch Ribbon plug Reservoir Waste Tank Metering Valve Display PCB Power Supply PCB Figure 16: Exploded View...

  • Page 24: Wiring Diagrams

    Wiring Diagrams Power Supply PCB Fuse Power Switch Supply Voltage E-GND Fuse VAC IN HTR PWR NEUT HTR NEUT Manual OTP PMP NEUT Thermostat Pump Display/Timer PCB Float Switch Pressure Switch 100 V Element 120 V Element Pressurize/Depressurize Switch Wiring Diagram 100/120 V...
  • Page 25 IRING IAGRAMS Power Supply PCB Fuse Power Switch Supply Voltage E-GND VAC IN HTR PWR Fuse NEUT Line Filter HTR NEUT PMP NEUT Manual OTP Thermostat Pump Display Timer/PCB Float Switch Pressure Switch 230 Volt Element Pressurize/ Depressurize Switch Wiring Diagram 230 Volt...

  • Page 26: Troubleshooting

    Troubleshooting y t l l l i c t i l i r l l i l i r . r i f i c . ) r t l i f . t i b i l ° F ± °...
  • Page 27 ROUBLESHOOTING < L " " . c t i c t i t i s . t f t ' n . t r c t i c t i y t l l l i l l a y t l L "...

  • Page 28: Maintenance And Servicing

    Maintenance and Servicing Piping Components Warning When troubleshooting the system, be Leaks sure that Vapo-Steril does not drip onto If the sterilizer cannot reach or maintain chamber pressure, power supply board. If the Vapo-Steril first inspect the door gasket and replace it if worn or drips or is spilled on the power supply damaged.
  • Page 29 AINTENANCE AND ERVICING Check for leaks around tube fittings and pipe threads at the pressure gauge, metering valve, and chamber. Do this by brushing the areas with soapy water. Leaks will appear as bubbles or foam that form and grow larger. If there is a leak, tighten the leaking part.

  • Page 30: Metering Valve

    AINTENANCE AND ERVICING If the door tension is tight and there are still leaks, inspect the gasket. Replace if necessary (see “Gasket Replacement”). If there are leaks around the seal screws, check the door collar. Replace the seal screws, and the door collar if required.
  • Page 31 AINTENANCE AND ERVICING Loosen and remove bands holding reservoir (do not cut band). Remove reservoir. (Lift up and set on top of unit.) Remove “C” clip next to PC board and pull knob and shaft away from metering valve. Loosen the clamp next to the metering valve on tubing leading to the chamber.
  • Page 32 AINTENANCE AND ERVICING need new drawing Figure 17: Metering Valve...

  • Page 33: Pressure Gauge

    AINTENANCE AND ERVICING Pressure Gauge The pressure gauge only indicates pressure. It has no effect on temperature. Failure of the gauge is highly un- usual. Before replacing the gauge, check other causes for pressure changes. Pressure Relief Valve The pressure relief valve releases pressure at the rating marked on the valve.

  • Page 34: Condenser

    AINTENANCE AND ERVICING Condenser In models EC5500 and EC6000 the condenser has a heatsink and a coil. Removing the Coil Remove the cover from the unit. Disconnect the fitting at the heatsink (see Figure 19). Disconnect the tubing from the other end of the coil.

  • Page 35: Purge Pump

    AINTENANCE AND ERVICING Door Replacement If replacement is necessary (see Figure 20). Door Collar If you can change the door adjustment by spinning the door, the door collar must be replaced. Replace the seal screws also (see Figure 20). Seal Screws Replace if the unit leaks from the door collar, or if the door collar is replaced (see Figure 20).

  • Page 36: Air Filter

    AINTENANCE AND ERVICING Air Filter Replace the air filter once a year. Mark the replacement date on the air filter for reference. To replace the air filter, disconnect tubing (from Purge Pump), install replacement air filter in the correct direction, and reconnect tubing (see Figure 21).

  • Page 37: Printed Circuit Boards (Pcbs)

    AINTENANCE AND ERVICING Fuse Replacement Disconnect unit from power supply. Remove unit cover. Remove the fuse. Check the fuse with an ohmmeter. Replace fuse if necessary. Reinstall fuse. Replace the unit cover. Reconnect unit to power supply. Printed Circuit Boards (PCBs) There are printed circuit boards: •...
  • Page 38 AINTENANCE AND ERVICING Testing the Printed Circuit Boards (PCBs) Check for voltage to Power Supply Board. • Set the probes of a DC voltmeter across test points TP1 and TP2 (see Figure 22). • Check for 5 VDC ± 0.25V. •...
  • Page 39 AINTENANCE AND ERVICING Figure 22: Power Supply Printed Circuit Board...
  • Page 40 AINTENANCE AND ERVICING VAPO COMPLETE PURGE TEMP POWER Jumper Conditions 60 Hz 50 Hz EC5500 EC6000 Figure 23: Display/Control Printed Circuit Board...

  • Page 41: Timer

    AINTENANCE AND ERVICING Timer The timer is part of the Display/Control Board. It indicates the time only. It cannot interfere with the sterilization cycle. When chamber pressure increases to about 20 psig (138 kPa), Pressure Switch closes. This enables the timer to count down.

  • Page 42: Heater

    AINTENANCE AND ERVICING Heater Warning Shock Hazard: Unplug power cord Functional Check before testing or replacing the heater. Test the continuity of the heater. 100V/230V Units Unplug unit from the power supply. Remove the top cover. Remove the Power Supply Shield over Power Supply Board.

  • Page 43: Chamber Temperature

    AINTENANCE AND ERVICING Replacement Heater is not field replaceable. Return the unit to the factory for repair. Chamber Temperature To verify the temperature, a thermometer assembly (Part #267569) is required. Remove the tray from the unit. Turn unit “ON” and allow to heat foe a mini- mum of 90 minutes.

  • Page 44: Overtemp Switch

    AINTENANCE AND ERVICING Locate thermostat: EC5500 — Remove top cover (see Figure 25). EC6000 — On the back of the unit, remove the 1-1/4” cover located in the bottom center of the back. Loosen the locking screw on the thermostat (see Figure 25).

  • Page 45: Pressure Switch

    AINTENANCE AND ERVICING Pressure Switch Note The pressure switch is set to close at 20 psi (138 kPa). If Be sure unit is cool and at room it does not, adjust it. temperature. Unplug unit from power switch and remove top cover.

  • Page 46: Check Valve

    AINTENANCE AND ERVICING Check Valve If the unit does not maintain pressure during operation, the check valve may not be seated properly. To reseat the check Valve: Run the unit in Purge for one minute to loosen the check valve ball. Run a test cycle.

  • Page 47: Recommended Spare Parts

    AINTENANCE AND ERVICING t l i & c t i c t i c t i c t i c t i c t i , y l n i l c t i i l e ] ) i...

  • Page 48: General Maintenance

    • Always line the instrument tray with chemically pure could create a slight vacuum and pull Harvey Tray Liners. Certain papers (such as paper towels) contain paper-processing impurities. If used waste Vapo-Steril solution back into the as liners, they may stain or cause deposits in the chamber from the waste tank.

  • Page 49: Draining The Waste Tank

    ENERAL AINTENANCE Draining the Waste Tank • Drain the waste tank when the VAPO indicator Warning lights on the control panel (see Figure 30). Vapo-Steril solution causes eye damage and may cause skin irritation. • If preferred, drain the waste tank daily—but also Do not get in eyes or on skin or whenever the VAPO indicator lights.

  • Page 50: Weekly

    Cleaning Chamber and Trays At least once a week, clean the chamber and trays with Hot Surface Harvey Chamber Cleaner. Clean whenever slight staining Wear protective gloves and safety appears. glasses. Chamber and trays may cause burns if touched.

  • Page 51: When Required

    Do not attempt to remove the cartridge while the sterilizer is processing. Remove the new Chemi-Filter from its package. Replace only with a Harvey Chemi- Mark the replacement date in the “Replace By” Filter. box on the Chemi-Filter label. To calculate the...

  • Page 52: Replacing The Door Gasket

    ENERAL AINTENANCE Months Until Replacement Calculation Values Needed: Assign proper values to c, D and T. c = no. of cycles/workday (operator defined) D = no. of workdays/week (operator defined) T = Total no. of cycles before filter needs replacement (see chart below). Total Cycles Before Replacement (T) Model EC5500...

  • Page 53: Door Adjustment

    ENERAL AINTENANCE Wipe the replacement gasket with a clean, damp cloth. Then insert the gasket into the gasket groove. • Seat the gasket in the groove at 12 o’clock, 6 o’clock, 3 o’clock and 9 o’clock. • Work the gasket into the groove in each of the four quadrants.

  • Page 54: Recommended Spare Parts

    ENERAL AINTENANCE Recommended Spare Parts t l i f t l i " 8 " 0 &...

  • Page 55: Two Year Limited Warranty

    Barnstead|Thermolyne or on the date it is purchased by the original retail consumer, whichever date occurs first. Use only HARVEY VAPO-STERIL solution in this sterilizer. DO NOT dilute, alter or otherwise change VAPO-STERIL solution in any way. Do not use water in the CHEMICLAVE sterilizer.

This manual is also suitable for:

Chemiclave ec6000

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