HARVEY Chemiclave EC5500 User manual

1
BARNSTEAD THERMOLYNE CORPORATION
Harvey®
Chemiclave
EC Series Sterilizers
SERVICE MANUAL
LT1121X2 • 11/13/00

2
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 ................................................................................................................................................... 8
Reservoir ................................................................................................................................................................. 8
Metering Valve ........................................................................................................................................................ 8
Chamber ................................................................................................................................................................. 9
Pressure Gauge ...................................................................................................................................................... 9
Pressure Relief Valve.............................................................................................................................................. 9
Condenser............................................................................................................................................................... 9
Condensate Tank .................................................................................................................................................... 9
Drain........................................................................................................................................................................ 9
Exhaust ................................................................................................................................................................. 10
Chemi-Filter........................................................................................................................................................... 10
Electrical Components ............................................................................................................................................ 10
Printed Circuit Boards ........................................................................................................................................... 10
Power Cord ........................................................................................................................................................... 11
Power Switch ........................................................................................................................................................ 11
Control Panel ........................................................................................................................................................ 11
Heater ................................................................................................................................................................... 11
Thermostat ............................................................................................................................................................ 11
Overtemp Switch ................................................................................................................................................... 12
Valve Shaft Switch ................................................................................................................................................ 12
Pressure Switch .................................................................................................................................................... 12
Sterilant Level Switch ............................................................................................................................................ 12
Principles of Operation .............................................................................................................................................. 13
Chemiclave Cycle (EC5500 & 6000)....................................................................................................................... 13
Filling the Reservoir .............................................................................................................................................. 13
Power ON.............................................................................................................................................................. 13
Warm Up ............................................................................................................................................................... 13
Ready/Load ........................................................................................................................................................... 13
Pressurization ....................................................................................................................................................... 13
Exposure ............................................................................................................................................................... 14
Depressurization ................................................................................................................................................... 14
Purge..................................................................................................................................................................... 14
Complete ............................................................................................................................................................... 14
Wiring Diagrams........................................................................................................................................................ 24
Troubleshooting ........................................................................................................................................................ 26
Maintenance and Servicing ....................................................................................................................................... 28
Piping Components ................................................................................................................................................. 28
Leaks..................................................................................................................................................................... 28
Metering Valve ...................................................................................................................................................... 30

3
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)............................................................................................................................... 37
Timer ..................................................................................................................................................................... 41
Power Switch ........................................................................................................................................................ 41
Heater ................................................................................................................................................................... 42
Chamber Temperature .......................................................................................................................................... 43
Thermostat ............................................................................................................................................................ 43
Overtemp Switch ................................................................................................................................................... 44
Pressure Switch .................................................................................................................................................... 45
Sterilant Level Switch ............................................................................................................................................ 45
Check Valve .......................................................................................................................................................... 46
Electrical Components ............................................................................................................................................ 46
Recommended Spare Parts .................................................................................................................................... 47
General Maintenance ................................................................................................................................................ 48
Daily ........................................................................................................................................................................ 48
Cleaning the Door Gasket ..................................................................................................................................... 48
Draining the Waste Tank....................................................................................................................................... 49
Weekly .................................................................................................................................................................... 50
Cleaning the Chamber and Trays ......................................................................................................................... 50
Monthly.................................................................................................................................................................... 50
Checking the Pressure Relief Valve...................................................................................................................... 50
When Required ....................................................................................................................................................... 51
Replacing the Chemi-Filter.................................................................................................................................... 51
Finding the Replacement Date ............................................................................................................................. 51
Replacing the Door Gasket ................................................................................................................................... 52
Door Adjustment ................................................................................................................................................... 53
Recommended Spare Parts .................................................................................................................................... 54
Two Year Limited Warranty....................................................................................................................................... 55
TABLE OF CONTENTS

4
Introduction
Figure 1: EC Series Chemiclave Sterilizers
Note
To save space, most figures in this
manual show only one of the models.
This is usually the EC5500. Both
models contain similar or identical
components and operate in a similar
way.
The Harvey® Chemiclave sterilizer is a safe, fast and
effective sterilizer for use in medical and dental offices,
hospitals, clinics and other health care facilities.
To sterilize goods, Chemiclave sterilizers use an unsatur-
ated chemical vapor process. The active ingredient in
Vapo-Steril, the liquid sterilant, is formaldehyde.
Two models of the EC Series are available: the EC5500 (8”
chamber diameter) and the EC6000 (10” chamber diam-
eter).
The model with a larger chamber (EC6000) can process a
larger load. Features of each model are summarized in
Figures 1 and 12 and in “General Specifications.”

5
General Specifications
0055CEledoM
eziStenibaC D"5.81xH"31xW"57.61
)mm074xmm033xmm524(
eziSrebmahC peed"52.31xretemaid"8
)mm733xmm302(
thgieW)gk8.62(.sbl95
egattaWretaeHW008
gnitaRlacirtcelE
spmA01,zH05,CAV001
spmA01,zH06,CAV001
spmA8,zH06,CAV511
spmA4,zH05,CAV032
erusserPgnitarepO)aPk672-831(gisp04-02
erutarepmeTnoitarepO231 °072(C °)F
evlaVfeileRerusserP)aPk013(gisp54
seiticapaCdiulF
riovreseRnoituloS).zo.lf73(sretil1.1
knaTetasnednoC).zo.lf73(sretil1.1
rebmahCtohS).zo.lf10.1(lm03
0006CEledoM
eziStenibaC D"5.02xH"5.61xW"52.91
)mm125xmm914xmm984(
eziSrebmahC peed"61xretemaid"01
)mm604xmm452(
thgieW)gk4.45(.sbl021
egattaWretaeHW0021
gnitaRlacirtcelE
spmA31,zH06,CAV001
spmA21,zH06,CAV511
spmA6,zH05,CAV032
erusserPgnitarepO)aPk672-831(gisp04-02
erutarepmeTnoitarepO231 °072(C °)F
evlaVfeileRerusserP)aPk013(gisp54
seiticapaCdiulF
riovreseRnoituloS).zo.lf73(sretil1.1
knaTetasnednoC).zo.lf73(sretil1.1
rebmahCtohS).zo.lf30.2(lm06

6
General Description
Figure 2: Control Panels—EC Series
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.
Indicators
POWER: Lights when power to the unit is ON.
TEMP: Turns on and off as the chamber heaters cycle on
and off.
COMPLETE: Lights when the exposure phase is complete.
PURGE: Lights when the chamber is being emptied of
vapors.
VAPO: Signals when the reservoir must be filled with Vapo-
Steril solution. The indicator will remain lit until solution is
added.
CONTROL KNOB: Attached to the valve shaft, this knob
controls the metering valve. Turning the control knob to
PRESSURIZE introduces VAPO-Steril into the chamber
and enables a cycle to begin. Turning the knob to DE-
PRESSURIZE permits vapors to exhaust from the chamber.

7
Figure 3: Major Components
GENERAL DESCRIPTION
Pressure
Switch
Pressure
Relief Valve
Air filter
Pump
Condensate
Tank
Drain
Door
Cover
Chamber
Chemi-filter
Reservoir
Sterilant
Level Switch
Filter Housing
Metering
Valve
Valve Shaft
Switch
Baffle Plate
Power
Cord
Filling
Cup
Exhaust to
Chemi-filter
From
Condenser
Exhaust to
Chemi-filter
Main fuse
holder
Seal
Screws
Door
Gasket
Door
Handle
Door
Latch
Door

8
GENERAL DESCRIPTION
Caution
Be sure you are using only Harvey
Vapo-Steril solution. Other solutions will
cause damage to the Chemiclave and
will void all warranties.
Chemi-Filter
The Chemi-Filter is placed in the top of the sterilizer. It
removes chemicals from the exhaust.
Door
The door latch secures the door. It is opened by the door
handle. The handle mechanism prevents the door from
being opened while there is pressure in the chamber.
Drain
A drain valve below the sterilizer door is provided to drain
used Vapo-Steril from the condensate tank.
Pressure Relief Valve
A safety valve on the rear of the sterilizer relieves excess
chamber pressure (see Figure 3).
Piping Components
See Figure 3 for major components and Figure 12 for
detailed component locations.
Reservoir
The reservoir holds about 1 liter of Vapo-Steril solution (see
“Technical Specifications” for exact amounts). The filling
cup has a spring-loaded valve. When the reservoir is full,
the valve stops the flow of solution from the filling bottle.
The reservoir contains a STERILANT LEVEL SWITCH.
This switch lights the VAPO indicator on the control panel
when the level of solution is low.
Metering Valve
Operated by the control knob, the valve has four ports
(including the shot chamber) and two settings, DEPRES-
SURIZE and PRESSURIZE.

9
GENERAL DESCRIPTION
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. The valve connects the shot
chamber to chamber. The measured amount of Vapo-
Steril from the shot chamber can enter the chamber. The
chamber can build pressure to run a sterilizing cycle.
Chamber
Pressure vessel where loads of instruments are steril-
ized. The pressure for a typical sterilizing cycle is 20 - 40
psig (138 - 276 kPa).
Pressure Gauge
Displays the chamber pressure.
Pressure Relief Valve
The pressure relief valve will open to relieve the chamber
pressure if it exceeds the pressure rating of the valve.
This valve is on the rear of the sterilizer.
Condenser
The condensing coils on the back of the sterilizer liquefy
the vapors that exit from the chamber.
Condensate Tank
The condensate tank collects the liquefied vapors from
the condenser. Any remaining vapors proceed through
the exhaust line to the Chemi-Filter.
Drain
The drain includes a valve in the chassis and a separate
fitting with plastic tubing. The operator inserts the fitting
into the valve to empty liquid waste from the condensate
tank.

10
GENERAL DESCRIPTION
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. The
Chemi-Filter should be installed before the sterilizer is
operated. It must be replaced regularly.
Pump
Propels air into the chamber during the purge phase, which
forces vapors out of the chamber through the vent port.
Air Filter
Removes contaminants from intake air before the pump
propels it into the chamber.
Check Valve
Prevents chamber back pressure from contacting the pump
and the air filter.
Electrical Components
Printed Circuit Boards (PCBs)
Power Supply Board
Transforms line power into working voltages. Acts as “input/
output” board for heater and pump.