OT 020 / OT 020V SERVICE MANUAL
Contents
1. GNDL CHAMBER SAFETY m 2 un S TN 2 lt amp Y 0 27 5 X amp 2 5 is E 2 E EE EN e 24 5 9 SSR WATER FILL EMPTY n STEAM TRAP STEAM DISCHARGE AIR DISCHARGE PHASE x 45 A az OPEN CLOSE 22 Er UD XYN ae NIN N W r 2 WATER LEVEL COMMON END 3 LID OVER PRESSURE La L N GND m as on E ES o o kei FE CONTS Figure 4 20 6 3 WATER AND STEAM UNIT DIAGRAMS T C CHAMBER STEAM TRAP OLENOID VALVE FILTER RESERVE TANK Figure 5 OT 020 flow diagram 21 lt LEVEL IR CHECK VALVE SAFETY SOLENOID MIN PRESSURE SWITCH TER FILL VALVE gt2. X VACUUM SOLENOID VALVE CHARGE LENOID VALVE Figure 6 OT 020V flow diagram 22 RESERVE TANK D GE SECTION 7 SPARE PART LIST 9 Figure 7 24 T AN AJ Y 8 Figure 25 Figure 9 Figure 10 Figure 11 28 Spare Parts List PARTS NAME MATERAL CODE 5 Water tank water level sensor 7 Ka Complete water tank rn 0 fs EN ran 32 Maximum pressure switch Minimum pressure switch This feature is valid only for OT 020V 1 piece for OT 020 29 Z11 R 02 239 Z11 G 04 196 Z11 M 07 049 Z11 K 10 041 215 5 02 002 Z11 M 51 186 Z15 T 09 092 Z15 P 15 166 Z12 F 07 018 Z11 C 03 145 Z11 P 03 370 Z11 K 23 020 Z15 V 06 006 Z17 B 06 005 Z11 V 03 163 Z12 F 06 031 Z12 V 01 020 Z12 V 01 020 Z12 V 01 020 Z12 P 12 006 Z12 P 12 007 Z12 R 07 013 Z15 F 06 008 212 09 041 Z12 V 01 020 Z12 V 01 020 Z12 V 01 010 Z12 A 03 018 212 5 13 010 Z12 A 03 025 Z15 G 05 018 Z12 P11 009 Z12 P11 006 QTY 2 34 Shelf carrier mounting screw Water inlet record 36 Filter Temperature sensor sterilization chamber Heater Connector fitting 30 Z11 R 02 237 Z16 R 02 236 Z15 F 06 033 219 1 01 036 215 102 111 Z12 F 07 019
3. N VE SANAY MALZEMELER MALAT VE T CARET A BENCH TOP STEAM STERILIZERS OT 020 OT 020V SERVICE MANUAL C En CONTENTS SECTION 1 INTRODUCTION 1 1 Purpose of the Service Manual 1 2 General Purpose SECTION 2 OPERATING PRINCIPLES 2 1 General Overview 2 2 Explanations of Functions 2 2 1 Power Supply Values 2 2 2 Main PCB 2 2 3 Clontrol Panel 2 2 4 Water and Steam Unit SECTION 3 SERVICING 3 1 General Overview 3 2 General Failure 3 3 Temperature Control Failure SECTION 4 CALIBRATION PROCEDURE 4 1 How to Measure the Actual Temperature 4 2 Calibration 4 2 1 OT 020 4 2 2 OT 020 V SECTION 5 SPARE PART REPLACING 4 1 Access to Command and Control 4 2 Replacing Main PCB 4 3 Replacing Display PCB 4 4 Replacing Temperature Sensor 4 5 Replacing Condense Selonoid Valve 4 6 Replacing Water Filling Solenoid Valve 4 7 Replacing Steam Discharge Solenoid Valve 4 8 Replacing Vacuum Line Solenoid Valve 4 9 Replacing Check Valve 4 10 Replacing Vacuum Pump 4 11 Replacing Water Pump 4 12 Replacing Safety Valve 4 13 Replacing Water Level Sensor 4 14 Replacing Heater 4 15 Replacing Plastic Panel 4 16 Replacing Locking Bobbin 4 17 Replacing Locking Switch 4 18 Cleaning the Sterilizator Chamber Filter 4 19 Replacing Pressure Switch SECTION 6 DRAWINGS AND DIAGRAMS 6 1 Electric Circuit Diagram OT 020 6 2 Electrical Circuit Diagram OT 020V 6 3 Water and Steam Unit D
4. If there is continuous outlet 12 VCD replace the main PCB Check the connection cables If there is short circuit correct it Check the SSR terminals If there is continuous outlet replace the SSR 11 FAILURE PROBABLE CAUSES SOLUTION appears on the display PCB does not outlet The SSR does not outlet The heater is defective The safety thermostat does not outlet for heating 8 error message 04 The endings of the temperature Connect the endings to the main appears on the display are connected in reverse correctly 9 error message 06 Water cannot be filled into the Check the water pump water charge solenoid appears on the display sterilizator chamber valve check valve and filter Replace the defective one 10 The error message H07 The SSR terminal of the main Check the SSR terminal outlet with a multimeter If there is no outlet 12 VCD replace the main PCB Check the SSR terminals Replace them if there is no electricity pass Check the resistance values of the heater with a multimeter If the heater is defective replace it Check with a multimeter whether the safety thermostat terminals are short circuit If there is no short circuit replace the safety thermostat 12 SECTION 4 CALIBRATION PROCEDURE 4 1 HOW TO MEASURE THE ACTUAL TEMPERATURE As the chamber is pressurized please use calibrated exte
5. appears on the time display by adding 2 if the set temperature is 121 C and the external sensor measures 118 C decrease the value which appears on the time display by subtracting 3 by using value increase or decrease keys 7 amp 8 Press stop to return to stand by mode 4 2 2 OT 020 V Figure 2 Press value increase and decrease keys 7 amp 8 together continuously until you see 0 on the temperature display and any value on the time display Press start stop 6 and pass to the 1 parameter and repeat this press start stop until you reach to the 7 parameter At the 7 parameter press stop 6 continuously until you see LC1 on the temperature display Press time set 4 you first see HC1 on the temperature display press time set again this time you see LC2 on the temperature display press time set again you see HC2 on the temperature display For the last time press time set and you see JC on the time display Press start stop 6 and change the value that appears on the time display according to the difference between the equipment s display and the external sensor If the set temperature is 121 C and the external sensor measures 123 C increase the value which appears on the time display by adding 2 if the set temperature is 121 C and the external sensor measures 118 C decrease the value which appears on the time display by sub
6. outlet 12 VCD replace the main PCB 10 The lid lock pin is not released even the pressure in the chamber drops to zero The lid lock mechanism is defective The lid locking bobbin is defective The main PCB locking bobbin relay does not outlet Check the whole mechanism Replace the locking bobbin Check the relay outlet If there is no outlet 12 VCD replace the main PCB 11 The samples are wet at the end of the operation There is an over loading of samples The drying time is not sufficient Check the load of the samples Please leave space between the samples Increase the drying time while programming This feature is valid only for OT 020V 10 FAILURE The temperature does not reach the set temperature 3 3 TEMPERATURE CONTROL FAILURES PROBABLE CAUSES The main PCB SSR terminal does not outlet The heater is defective The safety thermostat does not allow for heating SOLUTION Check the SSR terminal outlet with a multimeter If there is no outlet 12 VCD replace the main PCB Check the resistance values of the heater with a multimeter If the heater is defective replace it Check that the terminals are short circuited with a multimeter If there is no short circuit replace the safety thermostat The temperature exceeds the set temperature The main PCB SSR terminal outlets continuously There is short circuit in the heater connectio
7. sensor Disconnect the temperature sensor terminals from the main PCB 7 Take the temperature sensor out by a wrench Connect a new temperature sensor Put some liquid gasket on the new temperature sensor s connection thread to ensure sealing and fix the temperature sensor Be careful not to bend the connection cable e Make the temperature sensor terminal connections according to the electrical circuit diagram Figure 3 or Figure 4 5 5 Replacing Condense Solenoid Valve see Figure 9 Remove the solenoid valve bobbin socket after removing its screw Remove the solenoid valve mounting screw from the bottom part of the mounting sheet Remove the solenoid valve 25 inlet and outlet hoses by loosening the connection nuts Take the connection adaptors on the solenoid valve inlet and outlet and fix them onto the new solenoid valve e Mount the new solenoid valve as its arrow direction is shown in the water and steam unit diagram Figure 5 or Figure 6 e Mount the solenoid valve bobbin socket 14 5 6 Replacing Water Filling Solenoid Valve see Figure 9 Remove the solenoid valve 17 bobbin socket after removing its screw Remove the solenoid valve mounting screw from the bottom of the steam sterilizer Remove the solenoid valve 17 without moving the check valve and remove the connection adaptors on the solenoid valve Connect the new connection adaptors by putting some liquid gasket on to the inlet and outlet of the new
8. unit before you service it 3 1 GENERAL OVERVIEW The failures can be diagnosed according to the following tables Most of the arising problems can be determined by the help of a multimeter The components on the main PCB must not be replaced even the failure is caused by one of the components on the main PCB In this case please send the failed PCB to factory service along with a note on which the failure explanations are written Before replacing the PCB or any control element please make sure that the failure is not caused by weak wire and terminal connections 3 2 GENERAL FAILURES FAILURE 1 The on off switch is ON but it does not lighten the display is blank PROBABLE CAUSES Power supply inlet failure The glass fuse is blown SOLUTION Check that mains voltage is supplied to the unit Check that the terminal connections and power supply socket connections are well connected Replace the glass fuse and check the short circuit that causes the blowing of the fuse 2 The on off switch is ON and lightens but the display is blank or some segments do not lighten The main PCB display PCB connection cable is not well connected The cable with socket is defective The display PCB is defective The main PCB is defective Disconnect the connection cable and re connect it carefully Replace the cable Replace the display PCB Replace the main PCB 3 The on off switch is OFF but
9. Replacing Water Level Sensor see figure 8 Disconnect the water level sensor 5 main PCB 7 connection Remove the water tank 6 cover Remove the water level sensor tightening nut with a wrench Take the water level sensor out Mount the new water level sensor Replace the water tank cover and insulate it by putting liquid gasket Make the electrical connections according to the electrical circuit diagram Figure 3 or Figure 4 5 14 Replacing Heater Disconnect the cables which are connected to the heater terminals Take the shelf carrier 12 and the heater protection sheet 11 out by removing the shelf carrier mounting nut in the sterilization chamber Remove the heater mounting nuts carefully from the chamber bottom with a wrench and take the heater out from the sterilization chamber Mount the new heater to the connection threads by putting some liquid gasket to ensure that there is no leakage Make the electrical connections 5 15 Replacing Plastic Panel see Figure 10 Remove the display PCB 31 the printer and PC connection sockets which are on the panel sheet Remove the panel fixing screws and take the panel out Remove the plastic panel Clean the surface of the panel sheet with cleaners alcohol etc Paste the new panel by meeting the place of the display board and the keys on it 16 5 16 Replacing Locking Bobbin see Figure 7 amp Figure 9 Remove the flywheel handles 4 Remove the lid prot
10. ection cover 3 by removing its 4 screws Take the locking bobbin out by removing the bobbin 14 connection screws Separate the locking bobbin 14 electrical connection cables by cutting their welding points Take the pin on the locking bobbin and fix it onto the new bobbin Mount the new bobbin Connect the electrical connection cables by welding them carefully 5 17 Replacing Locking Switch see figure 10 Disconnect the locking switch 30 terminal connections Take the locking switch out by removing the locking switch connection nuts Mount the new locking switch and make the necessary electrical connections carefully according to the electrical circuit diagram figure 3 or Figure 4 Adjust the switching length carefully 5 18 Cleaning The Sterilizatior Chamber Filter see Figure 8 amp Figure 11 Take the shelf carrier 12 and the heater protection sheet 11 out by removing the shelf carrier mounting screws 34 in the sterilization chamber Take the filter 36 out which is placed on the bottom of the chamber by removing the water inlet record 35 with a wrench Clean the filter pores and re mount it 5 19 Replacing Pressure Switch see Figure 10 Disconnect the cable connections of pressure switch terminals Remove the pressure switch Put some liquid gasket to female connectors of the new pressure switch to ensure that there is no leakage and mount the new pressure switch Make the electrical connections caref
11. en from the water tank to the sterilization chamber The pressure in the sterilization chamber is followed on the manometer The steam charge steam discharge air intake condense and vacuum line solenoid valves are operated as explained in the section 1 2 by the main PCB The sterilization chamber safety valve operates if the pressure inside the chamber exceeds 3 5 Bar and it discharges the excess steam which leads to over pressure The maximum pressure switch cuts the power of heaters when the pressure inside the chamber exceeds 3 bar to protect the device and user The minimum pressure switch also prevents door to open if there is a pressure other than zero over zero in the chamber after the sterilization cycle and provides safe operation The second minimum pressure switch equipped in OT O20V is used to start the vacuum pump after the pressure inside the sterilizator chamber drops to zero The components of the water and steam unit are listed below Reserve tank Manometer Water charge solenoid valve Steam discharge solenoid valve Condense solenoid valve Vacuum line solenoid valve Water pump Vacuum pump Check valve Sterilization chamber safety valve 3 5 Bar This feature is valid for only OT 020V SECTION 3 SERVICING Caution Before servicing the instrument please take the necessary precautions for your health Please respect to the warnings on the unit Please make sure that you have disconnected the
12. er is kept at the required temperature and pressure during the set time During sterilization the condense solenoid valve keeps the pressure in the chamber constant according to the set temperature Steam discharge and drying OT 020 During the steam discharge phase the steam in the sterilization chamber is discharged and after the pressure has dropped to zero moisture in the sterilizator chamber is discharged according to driying time set on the OT 020 Steam discharge and drying OT 020V During the steam discharge phase the steam in the sterilization chamber is discharged and after the pressure has dropped to zero the vacuum pump is operated for drying During drying the air intake is ensured by opening the air intake solenoid valve and taking in fresh air after it has been passed through 0 2 um biological filter SECTION 2 OPERATING PRINCIPLES 2 1 GENERAL OVERVIEW The OT 020 and OT 020V can be split into 4 main groups Power supply values Control unit Heating unit Water and steam unit 2 2 EXPLANATIONS FOR THE FUNCTIONS 2 2 1 Power Supply The power supply values are listed below MN Power Supply Power inlet Heater Supply OT 020 10A 1500 W 230 V 50 Hz Stainless tube type 1450 W OT 020V 10A 1550 W 230 V 50 Hz Stainless tube type 1450 W 2 2 2 Main PCB The microprocessor controlled main PCB operates on proportional heating system The main PCB first prepares steam at the required temp
13. erature and pressure in the sterilization chamber Then it carries out the sterilization steam discharge and drying phases as explained in the section 1 2 At the end of the phases the sterilizer warns the users with an audible alarm that the cycle has ended 2 2 3 Control Panel The illustration below shows the functions of the display board For more information please see the OT 020 or OT 020V user s manual 0 Water filling led Figure 1 OT 020 1 Temperature display 11 Preperation led 2 Time display 12 Sterilization led 3 Temperature setting key 13 Steam discharge led 4 Time setting key 14 Drying led 5 Start key 15 Cycle completed led 6 Stop key 16 Lid open led 7 Value decrease key 17 Overpressure led 8 Value increase key 18 Maximum water level led 9 Alarm mute key 19 Minimum water level led 4 250 00 gt 0 Temperature display Time display Temperature setting key Time setting key Drying time Start Stop key Value decrease key Value increase key Alarm mute key VVater filling led Figure 2 OT 020V 11 Sterilization led 13 14 15 Lid open led 17 18 19 Preperation led Steam discharge led Drying led Cycle completed led Overpressure led Maximum water level led Minimum water level led 2 2 4 Water and Steam Unit The steam needed for the sterilization is generated by boiling the distilled water which is tak
14. iagrams SECTION 7 SPARE PART LIST Spare Parts List No RHPA 29 SECTION 1 INTRODUCTION 1 1 PURPOSE OF THE SERVICE MANUAL This manual includes servicing and maintenance information for OT 020 and OT 020V Bench Top Steam Sterilizers It is prepared to be used by technicians who were formerly trained by Nuve This manual informs the technicians about the operating principles diagnosing and repairing methods and spare part replacing If any problem determined which is not identified in this manual please contact to Nuve Servicing Team Factory Esenboga Yolu 22 km Akyurt ANKARA TURKEY Tel 00 90 312 399 28 30 3 lines Fax 00 90 312 399 21 97 e mail service nuve com tr 1 2 GENERAL PURPOSE The heating function is provided by means of the stainless heater placed inside the sterilization chamber The sterilization cycle consists of the water filling heating sterilization steam discharge and drying phases Water filling Distilled water is taken from the distilled water tank and pumped into the sterilization chamber by means of a vacuum pump Heating The distilled water in the sterilization chamber is heated to generate steam at the required temperature and pressure During heating the condense solenoid valve is opened and discharges the unsaturated steam periodically Sterilization When the sterilization chamber temperature reaches the set temperature sterilization starts The sterilization chamb
15. it lightens The on off switch cable connections are connected in reverse Check the connections and correct them 4 The fuse blows frequently Short circuit exists Check the heater with a multimeter If short circuit exists replace the heater Check all solenoid valve bobbins for short circuit with a multimeter If short circuit exits in any bobbin replace it Check the vacuum pump and water pump for short circuit If there is short circuit replace that pump Check all other electrical terminals and cables for short circuit 5 pressure in the sterilization chamber does not increase The safety valve is open One of the steam charge condense or vacuum line solenoid valves is open or defective The heater is defective The safety thermostat does not outlet for heating Close the valve by turning it to the counter clockwise direction Take the capsule of the solenoid valve out and clean the core of it If you cannot solve the problem replace the solenoid valve Check the heater Replace it if it is defective Check with a multimeter that there is short circuit in the safety thermostat terminals If there is no short circuit replace the safety thermostat This feature is valid only for OT 020V FAILURE PROBABLE CAUSES SOLUTION 6 The lid leaks steam The main PCB SSR relay does not outlet The SSR is defective The lid gasket does not fit well t
16. ket carefully 5 9 Replacing Check Valve see figure 10 Remove the water filling check valve 27 with their connection adaptors Remove the connection adaptors from the check valve and place them onto the new check valve Fix the new check valve as its arrow direction is shown in the water and steam unit diagram Figure 5 or Figure 6 Make sure that the check valve is mounted vertically which is an operating principle 5 10 Replacing Vacuum Pump see Figure 9 Disconnect the vacuum pump 20 electrical terminals Remove the vacuum pump inlet and outlet pipes Remove the vacuum pump mounting screws Place the new vacuum pump and make the necessary electrical connections carefully 5 11 Replacing Water Pump see Figure 9 This feature is valid only for OT 020V 15 Remove the water pump 21 electrical connection from the water filling solenoid valve 17 bobbin socket Remove the water pump inlet and outlet hoses Remove the water pump mounting screws Mount the new water pump and make the hose and electrical connections carefully 5 12 Replacing Safety Valve see Figure 8 Remove the safety valve 13 inlet and outlet hoses by loosening their connection nuts Remove the connection adaptors on the safety valve inlet and outlet Connect the connection adaptors to the new safety valve inlet and outlet by putting some liquid gasket Mount the new solenoid valve and make the hose connections carefully 5 13
17. n cables The SSR outlets continuously Check the main PCB SSR terminal outlet with a multimeter If there is continuous outlet 12 VCD replace the main PCB Check the connection cables If there is short circuit correct it Check the SSR terminals If there is continuous outlet replace the SSR The error LID OPEN lightens on the display The lid is forced to open during the operation The lid locking switch is defective Repeat the sterilization operation after the current operation has finished Check the switch and replace it if it is defective The error message OFF appears on the display Power is cut during the operation Repeat the sterilization The error message 01 appears on the display Temperature sensor endings are broken or they are connected to the main PCB loosely Check whether the endings are connected well to the main PCB Connect them properly if needed Check whether the endings of the temperature sensor are broken Replace the TC1 if they are broken The error message 02 appears on the display Electronical failure occured Replace the main PCB The error message H03 appears on the display and OVERPRESSURE led lightens The SSR terminal of the main PCB outlets continuously There is short circuit in the heater connection cables The SSR outlets continuously Check the SSR terminal outlet with a multimeter
18. o the canal The gasket is crushed or torn The adjustment of the lid is not good Check the outlet with a multimeter If there is no 12 VCD outlet replace the main PCB Replace the SSR Adjust the gasket length to make it fit properly Replace the gasket Tighten the lid adjustment screw 15 by turning it to the clock wise direction 7 The steam sterilizer does not discharge the steam in the chamber The main PCB discharge relay is defective The filter on the chamber inlet is clogged The steam discharge solenoid is defective Check the steam discharge relay outlet with a multimeter If there is no outlet replace the main PCB Take the filter out and clean it Take the capsule of the solenoid out and clean the core of it if it doesn t solve the problem replace the solenoid valve 8 The steam sterilizer stays under vacuum after the operation The air intake selonoid is defective The biological filter is clogged Take the capsule of the solenoid out and clean the core of it if it doesn t solve the problem replace the solenoid valve Replace the fiter 9 The lid is not locked when the steam sterilizer starts operating The locking mechanism is defective The locking bobbin is defective The main PCB locking bobbin relay does not outlet Check the locking mechanism Replace the locking bobbin Check the main PCB locking bobbin with a multimeter If there is no
19. rnal measuring devices which are independent of any cable thermometer data logger etc Insert your measuring device on one of the shelves in the chamber Be sure that the sensor of your measuring device does not touch any metal part in the chamber Make the necessary adjustments and start the program If the temperature of the equipment and the temperature of the measuring device are different from each other please apply the calibration procedure as below 4 2 CALIBRATION 4 2 1 OT 020 Figure 1 Press value increase and decrease keys 7 amp 8 together continuously until you see 0 on the temperature display and any value on the time display Press stop 6 and pass to the 1 parameter and repeat this press start stop until you reach to the 8 parameter At the 8 parameter press stop 6 continuously until you see LC1 on the temperature display Press time set 4 you first see HC1 on the temperature display press time set again this time you see LC2 on the temperature display press time set again you see HC2 on the temperature display For the last time press time set and you see JC on the time display Press stop and change the value that appears on the time display according to the difference between the equipment s display and the external sensor If the set temperature is 121 C and the external sensor measures 123 C increase the value which
20. solenoid valves Mount the new solenoid valve as its arrow direction is shown in the water and steam unit diagram Figure 5 or Figure 6 Mount the solenoid valve inlet hose by making sure that there is no leakage in the check valve connection Mount the solenoid valve bobbin socket carefully 5 7 Replacing Steam Discharge Solenoid Valve see figure 9 Remove the solenoid valve 18 bobbin socket after removing the screw Remove the solenoid valve mounting screw from the bottom part of the steam sterilizer Remove the solenoid valve 18 inlet and outlet hoses by loosening its connection nuts Remove the connection adaptors on the solenoid valve inlet and outlet and place them onto the new solenoid valve Mount the new solenoid valve as its arrow direction is shown in the water and steam unit diagram Figure 5 or Figure 6 Mount the solenoid valve bobbin socket carefully 5 8 Replacing Vacuum Line Solenoid Valve see Figure 9 Remove the solenoid valve 19 bobbin socket after removing its screw Remove the solenoid valve mounting screw from the bottom of the steam sterilizer Remove the solenoid valve 19 inlet and outlet hoses by loosening its connection nuts Remove the connection adaptors on the solenoid valve inlet and outlet and place them onto the new solenoid valve Mount the new solenoid valve as its arrow direction is shown in the water and steam unit diagram figure 5 or Figure 6 Mount the solenoid valve bobbin soc
21. tracting 3 by using value increase or decrease keys 7 amp 8 Press start stop 6 to return to stand by mode Caution Do not change any other parameters 13 SECTION 5 SPARE PART REPLACING Cautions Disconnect the steam sterilizer before replacing any component 5 1 Access to the Command and Control Unit See Figure 7 e Remove the water filling line record 1 on the top of the steam sterilizer e Take the cover sheet 2 out after removing the screws on the right and left sides of the steam sterilizer 5 2 Replacing Main PCB see Figure 8 amp Figure 10 Disconnect all cable terminals which are connected to main PCB clamps Disconnect the main PCB 7 display PCB 31 connection cable from the main PCB Remove the 6 fixing screws of the main PCB and take the main PCB out Place the new main PCB and make all electrical connections according to the electrical circuit diagram see Figure 3 or Figure 4 e Connect the display PCB connection cables to the new main PCB 5 3 Replacing Display PCB see Figure 8 amp Figure 10 Disconnect the main PCB 7 display PCB 31 connection cable from the display PCB Remove the 8 connection screws of the display PCB and take the PCB out Place the new display PCB by meeting the display keys and their places on the panel sheet Check that the led lamps meet their places on the plastic panel Re connect the main PCB display PCB cable 5 4 Replacing Temperature
22. ully according to the electrical circuit diagram Figure 3 or Figure 4 Adjust the minimum pressure switch 33 by turning the red adjusting switch counter clockwise or adjust the maximum pressure switch 32 by turning the red adjusting switch clockwise 17 SECTION 6 DIAGRAMS AND DRAWINGS 6 1 ELECTRICAL CIRCUIT DIAGRAM OT 020 GNDL n m m 3 m 5 02 F o a 1 ES m 1 SAFETY TH gt 3 ea mz ED 255 EN amp E 09 E MM VS SSR bo WATER FILL EMPTY N STEAM TRAP STEAM DISCHARGE COMMON PHASE 22 e 52 OPEN CLOSE gt LID a s DO du 5 gt lt WATER LEVEL Q GND x i LID OVER PRESSURE L e GND 3 Le NN eg Figure 3 19 6 2 ELECTRICAL CIRCUIT DIAGRAM OT 020V
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