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1. COMBO Push to cook in convection oven steamer combination mode then select HI When this button is pushed the oven cooks in a high humidity environment LO When this button is pushed the oven cooks in a low humidity environment NOTE Default is LO if HI or LO is not pushed CANCEL BEEPER START TIMER SELEGT TO COOK IN OVEN Push to cook in convection oven mode STEAMER MODE Temperature Display PUSH TO COOK IN COMBINATION MODE A Convection oven and combination cooking modes Shows set temperature in F Flashes until the set temperature is reached during pre heat B Steamer cooking mode Shows dashes Flashes until steamer is ready during pre heat SELECT HIGH OR LOW STEAM IN COMBINATION MODE PUSH TO COOK IN OVEN MODE TEMPERATURE Knob Turn to set cooking temperature in oven and combination cooking modes Maximum temperature that can be set is 350 F for Combo HI 450 F for Combo Lo and Oven the minimum temperature that can be set is 200 F CAVITY TEMP IN DEG F TIMER Display Shows remaining time when kitchen timer is operating Beeper sounds when remaining time is zero The two dots on display flash when timer is in use TEMPERATURE KNOB TO SET COOKING TEMPERATURE TIMER Knob Turn to set kitchen timer Time can be set from 1 minute 9 hours 59 minutes Push Start button to start timer count Time setting can be readjusted higher or lower during the timing cycle Beeper sounds when the set time
2. Groen Delimer Descaler P N 114800 Commercial Lime Away or any equivalent DO NOT use any cleaning or deliming agent that contains Citric Acid any Sulfa mic Agent or any chloride including Hydrochloric Acid WARNING Follow the handling instructions provided with the delimer descaler including the recommenda tions for protective rubber gloves protective clothing boots and protective eyewear c Vinegar commercial vinegar 5 to 7 strength has been used successfully by a number of Tri Res users as a descaler Follow the same instructions as when using delimer descaler IMPORTANT Do not use any metal material such as metal sponges or metal implements such as a spoon scraper or wire brush that might scratch any stainless steel surface Scratches make the surface hard to clean and provide places for bacteria to grow Do not use steel wool which may leave particles imbedded in the surface which could eventually cause corrosion and pitting PART NUMBER 152797 REVISION A GROEN Cleaning Steps WARNING ALLOW THE UNIT TO COOL COMPLETELY BEFORE DELIMING HOT SURFACES CAN CAUSE SEVERE BURNS STEP 1 Press OFF to turn the unit off Open the unit door STEP 2 Allow the Tri Res to cool completely before cleaning STEP 3 After the unit has cooled completely press LIGHT While the LIGHT is on press CLEAN The message OPEN DOOR AND REMOVE STEAM LID appears in the display Remove the pans and racks STEP 4 Remove
3. aes te eee dees 15 3 3 Installation CHECKIISt i ai gana tasa dead da gl ote Paws st te aa amet Sued dara fa dl amet Bea nd 40 ic 16 Water Teamet ssi co vis bared odie da aia bee do Wade we ee eee 17 3 4 General Cia eres asas Pila leet Cen Gea ica bund Seed Geet Ses bese Case deca PG yan Sede 18 TWO ia ss s bb Pak bk baka ae 19 20 DIAGNOSTICS TROUBLESHOOTING 4 1 Troubleshooting procedures and quick reference 0000000222 21 27 ASSEMBLY DISASSEMBLY 5 1 General Inia 00 0420200 deus a na ea aE ea Eea aa ide sist 28 5 2 Cavity Compartment Side beach vend eed dead Vader 29 3 3 TOP COVEN i nn Se ald Ley a aot Se tee Aon heated ace acd ace oe 29 5 4 THERES Control PC BOA isis ima ated dade da ia alocada 4 354 bd ad ad aa dd 2 29 5 5 7 30 5 6 Reserver Drain 5 48 75 66 ta acs 30 5 7 18 0 7 29 5 8 Door 01 EE 0 ie ea ane Peep 30 5 9 Ed A E 30 A 2 24 ee PE 30 5 11 BM 32 PART NUMBER 152797 REVISION A CALL 888 994 7636 FOR TECHNICAL SUPPORT 2 TABLE OF CONTENTS GROEN PARTS IDENTIFICATION 6 1 Control Panel Sub Assembly oa 33 6 2 High Voltage Panel Assembly GaS karret 34 6 3 Assembly Motor OG EEE 35 6 4 Water S
4. 56 4001 6000 6001 8000 8001 10000 PART NUMBER 152797 REVISION A CALL 888 994 7636 FOR TECHNICAL SUPPORT 23 TROUBLESHOOTING Fault Messages No product code The product code gas or electric is embedded in the ribbon cable at the controller end The cable may be damaged or partially disconnected Make sure the ribbon cable connector is properly seated in the mating connector on the back of the control board Oven too hot The temperature inside the oven is above 550 degrees F The temperature sensing RTD the high limit thermistor the control board or the relay board has failed or because one or more gas valves are stuck open RTD open The RTD temperature sensor has failed its connector has become disconnected from the relay board most likely the ribbon cable has been damaged or the control board has failed RTD shorted The RTD temperature sensor has failed its wire harness to the relay board has been pinched most likely or relay board has failed Control too hot The temperature sensor on the control board has detected a temperature above 180 degrees F The airflow thru the controller housing may be blocked one or both muffin fans may have failed or the control board has failed Burner not on Relight Ten minutes after the oven was turned on the temperature has not risen sufficiently The pilot went out or didn t light or the burners didn t light The igniter may have failed the igniter w
5. Open Ended Wrenches 1 4 through 7 8 Pipe Wrenches 6 and 8 size Allen Wrenches 1 16 through 1 4 Slip Joint Pliers ChannelLock or Equivalent Wire Crimpers 1 6 2 Recommended Instruments e Digital Multimeter Fluke Model 77 or equivalent 1 6 3 Helpful Hardware e Extension Mirror Screw Starter Level 18 Model Fuse Puller 1 6 4 Recommended Supplies e Pipe Thread Compound LACO PipeTite Stik No 11176 or equivalent e Motor Sealant Grease Bel Ray e 2 Aluminum Duct Tape e Removable Thread Locker Locktite Type 242 Door Locktite Type 222 Exterior e Clear Silicone Sealant Dow Corning Type 732 CALL 888 994 7636 FOR TECHNICAL SUPPORT 5 INTRODUCTION e High Temperature Anti Seize and Lubricating Compound Bostix NEVER SEEZ NSBT 16 1 7 HowTo Use This Manual Read this manual completely before attempting any disassem bly or repairs Please note the similarities and differences between the various models described in the manual Before making repairs you should have knowledge of the Tri Res operation as described in the Operations Section of this manual and a good understanding of service techniques as presented by the Groen Service School This service manual should be taken with you on all service calls Use the correct tools in accordance with the procedures shown and use only Groen Replacement Parts when performing Tri Res repairs PART NUMBER 152797 REVISION A GROEN CALL 888 994 7636 FOR TECH
6. Propane to Natural Gas Conversion Kit not shown 093670 TO RUNNER TBURNER SS 4 BURNER TO PILOT lt E DL PART NUMBER 152797 REVISION CALL 888 994 7636 FOR TECHNICAL SUPPORT 37 A PARTS IDENTIFICATION 6 6 Door Assembly GROEN No Description Part No Qty 1 Assembly Door Front Single Point Latch 152921 1 2 Assembly Panel Back 151040 1 3 Screw Flat HD 10 32 x 3 8 LG 069723 8 4 Assembly Bracket Single Point Latch Door 152924 1 5 Hinge Door Tri Res 20G 152007 1 6 Screw Hex Head Cap 1 4 20 005608 4 7 Gasket Door Inner 151045 1 PART NUMBER 152797 REVISION A CALL 888 994 7636 FOR TECHNICAL SUPPORT 38 PARTS IDENTIFICATION 6 7 Gas Valve and Piping Assembly GROEN No Description Part No Qty 1 Weldment Chmbr Combustion 152804 1 2 Assy U Burner Low Profile 152832 3 3 Plate Damper Rear UCS Oven 152810 1 4 Weldment Brkt Tube Ignition 152698 1 5 Tube Ignition U Burner 152695 1 6 Weldment Bracket Pilot 152849 1 7 Pilot Ignitor Low Profile 152693 1 8 Orifice Connector Assy See D 24 3 9 Orifice Igniter Tube 9 See D 24 1 10 Clamp Igniter Tube 085107 3 11 Washer Plain 1 4 005472 8 12 Nut Hex Head 1 4 20 005601 2 13 Screw Truss Head 072189 3 14 Screw Hex Head Cap 1 4 20 0056
7. Water level If combo or steam mode is selected one or more of the reser voirs will fill with water as long as the temperature is above 200 degrees There are two water level sensor probes one for the center reservoir and one for the right reservoir When the water level drops below a sensor probe boils off the associ ated water valve opens and refills the reservoir The probes are connected to the controller thru a debouncing circuit which keeps the water valve open about a second or two after the probe senses water This minimizes the number of times the water valve has to cycle to keep the reservoir filled Whenever a fill or drain valve is first opened a timer is started 60 seconds for fill and 90 seconds for drain It the water level has not changed when this timer finishes an error message is displayed telling which valve fill or drain in which reservoir 1 or 2 took too long to change If it takes too long to fill or drain a reservoir it could mean that the sensor probe is contaminated and should be cleaned Fill timeout could also mean that the water pressure is very low or the main water valve is turned off Drain timeout could mean that the drain is plugged Clean it Whenever a drain valve is first opened the associated water valve is opened for one second to help open the pinched drain hose and to flush food particles out of the drain line 5 Door The door may be opened for brief periods to move food into PART NUMBER 152
8. ANSI Z21 41 CSA 6 9 B Adequate means must be provided to limit the movement of the appliance without depending on the connector and the quick disconnect device or its associated piping to limit the ap pliance movement C The location where the restraining device may be attached to the appliance shall be in accordance with Groen specifica tions for the device see photo Eyebolt connector on the back of the unit PART NUMBER 152797 REVI CALL 888 994 7636 FOR TECHNICAL SUPPORT 14 SION A INSTALLING CLEANING AND TESTING 3 2 Installation Many of the problems associated with the degraded perfor mance or non operation of the Tri Res can be traced directly to improper installation and or lack of proper periodic cleaning all of which is the responsibility of the customer This section is provided to determine that the equipment was installed correctly to indicate the proper cleaning techniques are to be used by Groen customers and Tri Res test procedures Itis to be expressly noted that ALL work associated with the installation and cleaning of the Tri Res is NOT covered by Groen warranty provisions 3 Water Connection s Install a check valve to prevent back flow in the incoming cold water line as required by local plumbing codes Water pressure in the line should be between 30 and 60 PSI If the pressure is above 60 PSI a pressure regulator will be needed These pres sures must provide the 1 5 gallons per minute
9. any spilled foods from the steam lid Remove the steam lid from the steam reservoir NOTE Use protective gear including eyewear for the following steps involving delimer descaler STEP 5 With the door open add 1 3 cup of delimer des caler or vinegar to the water in each reservoir one cup total and close the unit door NOTE ADDITIONAL AMOUNTS OF DELIMER AND LONGER TIME SETTINGS ARE NOT RECOMMENDED THEY WILL NOT INCREASE THE EFFICIENCY OF THE PROCEDURE STEP 6 The unit will steam for 20 minutes the display shows the number of seconds remaining and drain for two minutes At this time the oven is hot and the message changes to OPEN DOOR TO COOL OVEN When the door is opened the message changes to COOLING When the oven has cooled sufficiently to allow it to continue the message CLOSE THE DOOR is displayed When the door is closed the oven enters the cleaning cycle at the first rinse step It rinses twice displays CLEAN COMPLETE TIME LEFT and turns itself off STEP 7 Open the door and wipe down the cavity and steam reservoir to remove all traces of scale and cleaning solution Reinstall the panracks and lid NOTE IF SCALE BUILD UP STILL REMAINS REPEAT THE PROCEDURE STEPS 5 7 AS NECESSARY CALL 888 994 7636 FOR TECHNICAL SUPPORT 20 INSTALLING CLEANING AND TESTING Maintenance The Tri Res is designed for minimum maintenance Certain parts may need replacement after prolonged use If there is a need for service
10. cycle is complete Push CANCEL to stop the beeper TIME DISPLAY FAN SPEED Convection fan can be operated at high or low speed When a fan speed is not selected default the fan operates at high TIMER KNOB TO SET TIME speed Low speed is recommended for cooking delicate products LIGHT Push this button to turn interior oven lights on The light will automatically shut off after a brief period CLEAN Push this button to start the semi automatic cleaning cycle Familiarize yourself throughly with the cleaning procedure in the cooking cavity cleaning section of this manual before using the clean function SELECT LOW OR HIGH FAN SPEED FOR RINSING OVEN CAVITY TURN INSIDE LIGHTS ON POWER ON OFF SWITCH This rocker switch is the main power switch for the oven Push the ON side to start the unit and OFF side to shut unit down It is recommended that this switch be used once or twice per day at the beginning of cooking period MAIN POWER ON OFF SWITCH HOUR METER Shows the unit s total hours of operation HOUR METER 160652 REVG PART NUMBER 152797 REVISION CALL 888 994 7636 FOR TECHNICAL SUPPORT 12 A INSTALLING CLEANING AND TESTING 3 1 Gas Model Installation WARNING The unit must be installed by personnel who are qualified to work with gas electricity and plumbing Improper installation can cause injury to personnel and or damage to the equipment The unit must be installed in accordance with applicable cod
11. gas pressure is per chart in section 3 2 Electrical Checks Make sure the Tri Res is properly grounded Verify that the electrical connections conform to all local codes and the NEC requirements Make sure the power supply branch circuit conforms to the specifications indicated on the Tri Res nameplate Tri Res Door Check Make sure the door gasket is making good contact with the cavity frame Instruct operators to leave the door open when the PART NUMBER 152797 REVISION A GROEN Tri Res is shut down overnight or longer Cold Water Supply Connections Make sure plumbing connections conform to local codes If permitted by local codes check that hose connec tion is flexible to allow Tri Res movement for servicing Check inlet water pressure is 30 60 PSIG Check that the water feed line is minimum of 1 2 inside diameter Check water flow in section 3 3 Drain Connections Make sure drain plumbing connections comply with local codes Make sure drain line is 1 1 2 and 2 1 2 on stacked units Check that drain line is suitable for boiling water Make sure PVC is not being used for drain plumbing Check that drain line is pitched downward Make sure drain line is free of obstruction Make sure drain is not connected to a building drain CALL 888 994 7636 FOR TECHNICAL SUPPORT 16 INSTALLING CLEANING AND TESTING Water Quality and Treatment It is essential to supply the steam generator with water that
12. is good then the temperature sensor should measure room temperature approximately 70 on the display If the air inlet at the bottom of the housing becomes plugged or if the internal muffin fans fail then the air temperature around the control board will rise If it rises to 180 degrees F the danger temperature the display will read 138 PART NUMBER 152797 REVISION A GROEN 5 BUTTON This test checks all the control panel buttons Push all the buttons one at a time When the buttons are pushed the associated LED lights If the LED stays lit after the button is released it usually means the plastic panel overlay is keeping the button pushed in The START button also tests the beeper The CANCEL button turns off the backlight on the text display 6 FIRMWARE This test displays the current firmware version in the TEMPERATURE display It should be 2 28 or greater 7 SHUTDOWN This test checks the latching relay circuitry on the relay board Turn the oven on by pushing the ON switch Push START to unlatch the relay and listen for the faint click as the relay and pilot valve release Push START again and notice that there is no click this time since the relay is already released Push the ON switch and listen for the faint click as the relay and valve pull in Leave the power switch on 8 LIGHT This test checks the lights in the door Push START All the lights in the door should light Replace the ones that are burned
13. nuts The entire combustion chamber is constructed as a slide out drawer to remove follow the instructions below NOTE Shut off power and gas supply Removal 1a Disconnect the flexible gas lines and moving them out of the way 3b Remove the four 4 bolts that attach the damper and com See Below bustion chamber plate and pull out the drawer 1 Burner Supply Line 2 Pilot Supply Line 3 Burner Supply Line 4 Burner Supply Line 5 Runner Tube Supply Line 3 1b Disconnect power and gas supplied to the unit 2 Remove the left side panel by removing the three exterior screws 5 Remove the 5 1 4 screws on the holding plate near the ignition tube and the two on the bottom of the holding plate 6 Loosen the 3 4 compression fitting on the ignition tube and move it toward the base 7 Slide the burner out the left side of the unit PART NUMBER 152797 REVISION A CALL 888 994 7636 FOR TECHNICAL SUPPORT 31 ASSEMBLY DISASSEMBLY GROEN Installation 4 Plug in the HSI and flame sensor 1 Slide the new burner into the left side of the unit 5 Turn on gas supply and power to the unit 6 NOTE The ignition tube does not receive gas until the burn 2 Attach the ignition tube and tighten the 3 4 compression ers are active fitting 7 Install the side access plate with 2 10x32 nuts 8 Re install the left side panel with the three exterior screws PART NUMBER 152797 REVISION A
14. or rubber scraper with a detergent solu tion Stainless steel surfaces may be polished with a recognized stainless steel cleaner such as Zepper PART NUMBER 152797 REVISION A GROEN WARNING Disconnect the power supply before cleaning the outside of the Tri Res Keep water and cleaning solutions out of controls and electrical components Never hose or steam clean any part of the unit Avoid contact with any cleanser deliming agent or degreaser as recommended by the supplier Many are harmful Read the warnings and follow the directions Even when the unit has been shut off don t put hands or tools into the cooking chamber until the fan has stopped turning Don t operate the unit unless the removable partition has been put back in its proper location Do not use any cleaning agent that contains any sulfamic agent or any chloride including hydrochloric acid HCI To check for chloride content see any material safety data sheets provided by the cleaning agent manufacturer WARNING DO NOT DISASSEMBLE DURING CLEANING BREAKAGE WILL RESULT USE HOT WATER TO WASH OUT CALL 888 994 7636 FOR TECHNICAL SUPPORT 18 INSTALLING CLEANING AND TESTING Interior Cleaning NOTE Clean the unit daily or as residue builds upon the bottom of the oven cavity 1 Turn off the unit by pressing once on the current or last operating mode For example if you are in steam mode press STEAM button once more so that the
15. red indicator light is off NOTE The unit cannot be operated in the CLEAN mode while the oven is in operation 2 Press CLEAN button The LCD display will instruct you to empty the oven Display reads OPEN DOOR AND REMOVE RACKS 3 Open the door and remove all food pans oven racks the two rack support on side and the two halves of steam baffle located on the bottom of the oven When door is opened display reads SPRAY CLEANER AND CLOSE DOOR 4 Once these are removed spray a detergent cleaner on interior walls NOTE use a cleaner that is safe for oven use and will degrease in presence of steam 5 Close the door Display reads CLEAN MODE SOAK TIME 6 The rest of the clean cycle is automatic and you have to do nothing but leave or wait till clean cycle is over 7 If the oven is hot when the clean cycle has started the display will read OPEN DOOR TO COOL OVEN Open the door display reads COOLING When the oven has cooled sufficiently the display reads CLOSE THE DOOR Close it The clean cycle continues with the soaking period 8 After soaking the oven interior will be automatically sprayed with rinse water to remove the cleaner At anytime during the clean cycle the door may be opened to spray more cleaner on the cavity walls When the door is closed the cycle resumes with the soaking period 9 After rinse the oven will drain the water and then go into a PART NUMBER 152797 REVISION A GROEN s
16. required for proper unit function 4 A 3 4 inch female NH connector garden house type 5 used to attach the water supply to the inlet valve Minimum inside diameter of the water feed line is 1 2 inch Use a washer in the hose connection Do not allow the connection to leak no matter how slowly Do not over tighten hose connec tions 5 This equipment is to be installed to comply with basic plumbing code of the Building Officials and Code Administra tors International Inc BOCA and Food Service Sanitation Manual of the Food and Drug Administration FDA NOTE Local code may also require check valves in the water supply line ANSI 21 69 CSA 6 16 and a quick disconnect device that complies with the standard for quick disconnect devices for use with gas fuel ANSI Z21 41 CSA 6 9 Adequate means must be provided to limit the movement of the appliance without depending on the connector and the quick disconnect device or its associated piping to limit the appliance movement PART NUMBER 152797 REVISION A The location where the restraining device may be attached to the appliance shall be in accordance with Groen specifications for the device 6 Drain Line Installation The drain line should not be less than 1 1 2 for single units 2 for double stacked units There must be a 2 air gap to the non pressurized building drain Make sure that the drain is sloped AWAY and DOWN from the Tri Res and that there are no
17. the door latch for smooth operation If necessary lubricate the latch spring with a food grade PTFE lubricant NOTE DOOR ADJUSTMENT If steam or condensate is seen leaking from around the door take the following steps 1 Check the door gasket Replace it if it is cracked or split 2 Inspect the cooking chamber drain to be sure it is not blocked 3 Adjust the latch pin as follows a Loosen the lock nut at the base of the latch pin and turn the latch pin Y turn clockwise Re tighten the lock nut b After adjustment run the unit in the Steam Mode to test for further steam leaks If leakage continues repeat the adjustment d Continue adjusting the pin clockwise until the door fits tightly enough to prevent leaks CALL 888 994 7636 FOR TECHNICAL SUPPORT 21 TROUBLESHOOTING GROEN SETUP EXPECTED RESULTS PROBABLE DEFECT TEST or COMMENTS Measure Input voltage and Input voltage is within 10 of Wrong model voltage Notify customer amps rated voltage and 5 7 amps installed to incoming power supply Verify gas supply Propane or Correct gas source and pres Wrong model ordered Gas conversion not performed Natural and pressures sure A the field Disconnect or turn off water 24vac on secondary trans INolne Line supply open door push OFF former Heartbeat LED on back Blown 10 amp fuse F1 switch on control board flashes once Ada 120vac in and 24vac Control board or Relay board Substitute t
18. will not form scale Even though the boilerless steam generator is engineered to minimize scale formation scale development de pends on the hardness of your water and the number of hours you operate the equipment each day Most water supplies contain minerals which form scale it is this scale which could lead to an early component failure Your local water utility can tell you about the minerals in your water The water going to the steam generator should have between 30 and 40 parts per million ppm total dissolved solids TDS and should have a pH acidity rating of 7 0 to 9 0 Please follow these simple precautions 1 The best way to prevent scale is to use a Groen PureSteam TM Water Treatment System which has been specifically designed for Groen steamers and combination ovens Do not rely on unproven water treatments sold for scale preven tion and removal They are not specifically designed to work with Groen steamers and combination ovens 2 A well maintained water treatment system and a regular cartridge replacement schedule 15 essential 3 Using a Groen water treatment system will provide longer steam generator boiler life higher steam capacity and reduce maintenance requirements 4 If you notice a slowdown in steam production check the unit s bottom for scale build up This could be an indication that the water treatment cartridges need replacing Heavy scale reduces the unit s ability to boil water and can even caus
19. 08 13 15 Screw Truss Head 012700 6 16 Orifice Spud Nat Gas 025 152006 1 17 Coupling Full 1 8 NPT 059908 1 18 Connector 1 4 Tube to 1 8 NPT 056899 1 19 Coupling Full 3 8 NPT 059908 3 20 Connector Male 3 8 050879 3 21 Tri Res Ignition Wire Sleeving 152011 1 PART NUMBER 152797 REVISIONA CALL 888 994 7636 FOR TECHNICAL SUPPORT 39 GROEN WIRING DIAGRAM DISPLAY 152904 RELAY BOARD 160651 LIGHT 160651 RELAY BOARD T1 4 0 5 CALL 888 994 7636 FOR TECHNICAL SUPPORT 120 VAC IN 46 9 BLACK 120 V TRANSFORMER 100 VA 40 PART NUMBER 152797 REVISION A LADDER DIAGRAM GROEN LEVEL PROBE 1 LEVEL PROBE 2 RTD T FAN ON PART NUMBER 152797 REVISIONA CALL 888 994 7636 FOR TECHNICAL SUPPORT 41 GROEN Notes PART NUMBER 152797 REVISION A CALL 888 994 7636 FOR TECHNICAL SUPPORT 42 GROEN 1055 Mendell Davis Drive Jackson MS 39272 888 994 7636 601 372 3903 Fax 888 864 7636 groen com PART NUMBER 152797 REVISION A
20. 797 REVISION A GROEN and out of the cavity without disturbing the burners However if the door is open for five minutes or more the burners are turned off As soon as the door is closed the burners resume normal operation Whenever the door is open the cavity fan is stopped and the timer if running is paused During the clean cycle the rinse water is stopped whenever the door is open 6 Cavity fan The cavity fan normally operates at high speed Pushing the Fan Speed LO button selects the low speed Whenever the cooking mode is changed the fan speed is automatically set to high 7 Timer When the power switch is turned on the timer is paused the colon in the TIMER display does not flash to indicate pause Adjust the TIMER knob the lower knob for the desired cooking time in hours and minutes Push START to allow the timer to run the colon flashes indicating that it is running At the end of the timing period the beeper sounds and the CANCEL indicator flashes Push CANCEL to stop the beeper Note that this is all the timer does it is a simple kitchen timer It does not stop any cooking process it simply alerts the operator that the timer has timed out 8 Muffin fan The two muffin fans run whenever the power switch is on The forward fan draws cooling air in from the bottom of the control panel housing and over the control board The rear fan exhausts the air out the back panel When the power switch is turned off the cav
21. 9 Operate Tri Res and check for leaks 5 8 Door Switch P N 096857 Note One normally open door switch is factory installed on one side of the control panel housing It is activated that 5 closed by the proximity of the door magnet 1 Remove the side panel and the control panel housing for access to the door switch that is to be replaced 2 Unplug the door switch from the Tri Res harness 3 The switch is held in place with two small 4 40 screws With a slotted screwdriver remove these screws and the switch may be removed 4 To install the switch use the two 4 40 screws and a screw driver with a screwstarter features 5 Connect switch leads to steamer harness 6 Replace control panel housing and side panel 7 Test Tri Res operation 5 9 Door Gasket For Part Number see Parts Identification Section NOTE Door Gasket not covered under terms of warranty Removal 1 Turn off Tri Res power and allow to cool 2 Remove the door using one of the following two methods a Support the door and remove hinge pin or b Support weight of the door and remove the two door to hinge bolts 3 Place the door on flat clean smooth table or similar support with handle hanging over edge Be careful not to scratch the door 4 Remove four or eight 8 32 truss head screws and remove inner door panel PART NUMBER 152797 REVISION A GROEN 5 Remove and discard door gasket 6 Clean back of the inner door panel Be sure old sealan
22. CALL 888 994 7636 FOR TECHNICAL SUPPORT 24 TROUBLESHOOTING DIAGNOSTIC CHECK OF SYSTEM 1 ENTER DIAGNOSTICS Push STEAM COMBO OVEN and CLEAN all at the same time it takes two hands The display says DIAGNOSTICS EXIT Rotate the TIMER knob the lower knob clockwise The names of the various diagnostic tests appear in the second line of the display It s usually best to execute the tests in order 2 RIDTEMP The value shown in the red TEMPERATURE display is the temperature in degrees F measured by the RTD sensor in the oven cavity If the oven is at room temperature then the display will indicate approximately that temperature If the oven has recently been used then the indicated temperature will be considerably higher 3 RTD VOLTAGE This test checks for a shorted or open RTD The value displayed is approximately 20 of the RTD voltage in millivolts At room temperature the display should show approximately 110 At 450 degrees the display should show approximately 180 This is the normal operating range for the RTD If the RTD is shorted pinched wires the display will show a value around zero If the RTD is open or disconnected the value will be above 900 4 LOCAL TEMPERATURE This test checks for deficient airflow thru the control panel housing There is a temperature sensor mounted on the control board right behind the control panel If the cooling air flow thru the control panel housing from bottom to top
23. CALL 888 994 7636 FOR TECHNICAL SUPPORT 32 PARTS IDENTIFICATION GROEN 6 1 Control Panel Sub Assembly No Description Part No Qty 1 Panel Control Tri Res 151109 1 2 Control Panel Mounting Bracket Assembly 152992 2 3 Hour Meter Redington 149295 1 4 Knob 1 5 Dia 160921 2 5 Rocker Switch 160920 1 6 Switch Door 096857 1 7 Control Panel Display 152904 1 8 Control Board Tri Res not shown 160650 1 9 Overlay Front Panel Tri Res not shown 160652 1 10 Gasket Control Panel not shown 152998 1 PART NUMBER 152797 REVISION A CALL 888 994 7636 FOR TECHNICAL SUPPORT 33 PARTS IDENTIFICATION GROEN 6 2 High Voltage Panel Assembly Gas No Description Part No Qty 1 Weldment Electrical Panel High Voltage 152602 1 2 Module Ignition HSI 140184 1 3 Transformer 75VAC 121716 1 4 Screw Hex Slotted HD 8 32x 375 069789 8 5 2 Pole Terminal Block 152641 1 6 Ground Lug 119829 1 7 Fuse 152012 1 8 Fuse Block 77840 1 9 Tri Res 20 Relay Board 160651 1 AS Ep a gt PART NUMBER 152797 REVISION A CALL 888 994 7636 FOR TECHNICAL SUPPORT 34 PARTS IDENTIFICATION GROEN 6 3 Assembly Motor Mount No Description Part No Qty 1 Motor Mounting Plate 152825 1 2 Lesson 1 2 HP Motor 152637 1 3 Mo
24. CEE EEE ETE ENE TE da a ad NE 36 6 5 Gas Valve DE A E deus tu seed 37 6 6 el PP 38 6 7 Burer ASSeEMBIY au as da Sed a cas Bad and dark 39 SPECIFICATIONS 6 1 PIE 40 6 2 A A 41 PART NUMBER 152797 REVISION A CALL 888 994 7636 FOR TECHNICAL SUPPORT 3 INTRODUCTION 1 1 The Groen Service Concept Since 1907 Groen has been in the business of designing and manufacturing the finest commercial appliances for the food service industry Chefs cooks and kitchen support personnel have come to depend upon the quality of construction and the reliability of operation Groen in turn depends upon our service centers and their field service personnel to keep the equipment in top operating con dition In order to do this our designs are made with service and reliability in mind Once the Groen equipment is sold manufactured delivered and installed our reputation is clearly in your hands As part of our team we value your efforts and input to our product design We will do all we can to make your job of keeping the equip ment in perfect working order as easy as we can Together we will keep our customers satisfied 1 2 Groen Certified Service The Tri Res has been carefully designed to provide many years of efficient and reliable service Part of the quality program is Groen certified Service This includes e Groen certifies that all equipmen
25. ING After servicing gas piping on gas models check for gas leaks before putting unit back in service 5 2 Cavity Compartment Side Panels For Part Number see Parts Identification Section Removal 1 With a flat blade screw driver remove the two 10 32 screws on the lower edge of the panel and two at the back edge The panel is retained to the steamer by these four screws 2 Once the screws are removed the panel can be pulled for ward about 1 inch then raised above the top panel overhang 5 3 Top Cover For Part Number see Parts Identification Section Note Under normal conditions the top cover should never have to be removed The most likely reason for removing it is if the panel itself has been damaged by a falling object 1 Remove right side and left side panels and upper rear panel 2 Slide the cover forward until clear of the front overhang and lift off PART NUMBER 152797 REVISION A GROEN 5 4 Tri Res Control PC Board P N 160650 WARNING Disconnect the steamer from electric power before beginning any service procedures 1 Remove the four screws from the right side panel Once the screws are removed the panel can be pulled forward about 1 inch then raised above the top panel overhang and removed 2 Remove control board housing by removing six nuts from rear of housing 3 Unplug the ribbon connectors 4 Remove the knobs 5 Using a 5 16 socket remove the ten 6 32 lock nuts and remove
26. MBER 152797 REVISION A GROEN from the gas supply which has test pressures in excess of 1 2 PSI 3 45 kPA It must be isolated from the gas supply piping system by closing its individual manual shutoff valve during any pressure testing of the gas supply piping system which has test pressures equal to or less than 1 2 PSI 3 45 kPA 1 Electrical Supply Connection Provide 115 VAC 60 HZ 1 PH 15 AMP service Bring wire in through hole on the back panel Each cavity requires a separate cord for connection Local codes and or the National Electrical Code should be observed in accordance with ANSI NFPA 70 AN ELECTRICAL GROUND IS REQUIRED The wiring diagram located in the service compartment and in this manual Maxi mum load is 12 AMPs In Canada provide electrical service in accordance with the Canadian Electrical Code CSA C22 2 Part 1 and or local codes 2 Gas Supply Connection Connection to the gas supply shall be in accordance with the chart below Supply pressure must be at least 5 W C maxi mum 14 W C for natural gas or 12 W C maximum 14 W C for LP gas In Canada the installation must conform to the Canadian Gas Code CAN 1 B149 Installation Codes for Gas Burning Appliances and Equipment and or local codes Check all gas connections for leaks prior to unit operation Ratings for Gas Tri Res Measured at gas manifold BTU Operating MIN MAX Pressure Incoming Gas Incoming G
27. NICAL SUPPORT 6 OPERATION GROEN Initial Startup After the Tri Res has been installed test it to ensure that the unit is operating correctly K WARNING gt AVOID STEAM CONTACT 1 Remove all literature and packing materials from the interior and exterior of the unit 2 Make sure the water supply line is open WARNING 3 Make sure that the gas supply line is open WHEN YOU OPEN THE DOOR STAY AWAY and that the manual knob on the main gas FROM STEAM COMING OUT OF THE UNIT valve is turned to the ON position This STEAM CAN CAUSE BURNS valve is at the rear on the left side of the unit 4 Turn on electrical service to the unit The 8 Press the LIGHT button to turn on interior lights unit will not operate without electrical power Do not attempt to operate the unit during a power failure The lights will automatically turn off after 5 seconds 9 Ifthe unit operates as described the NOTE The door MUST be closed for the unit is functioning correctly and ready for use fan to work NOTE For operation at high altitudes 2000 feet and above please consult the Groen Engineering Department 5 To turn the unit on press the ON switch on the control panel 6 When any of the four 4 cooking modes are selected the main burners will ignite automatically The unit will indicate that it s ready to cook within 25 minutes or less The ready condition is indicated as follows In oven mode Tempera
28. SERVICE MANUAL IMPORTANT INFORMATION KEEP FOR OPERATOR This manual provides information for MODELS TRI RES 20G amp 2 TRI RES 20G COMBINATION OVEN Self Contained Gas Heated Capacity TRI RES 20G 10 Steamer Pans Per Cavity MADE IN USA a ees THIS MANUAL MUST BE RETAINED FOR FUTURE REFERENCE READ UNDERSTAND AND FOLLOW THE INSTRUCTIONS AND WARNINGS CONTAINED IN THIS MANUAL FOR YOUR SAFETY Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance POST IN A PROMINENT LOCATION Instructions to be followed in the event user smells gas This information shall be obtained by consulting your local gas supplier As a minimum turn off the gas and call your gas company and your authorized service agent Evacuate all personnel from the area WARNING Improper installation adjustment alteration service or maintenance can cause property damage injury or death Read the installation operating and maintenance instructions thoroughly before installing or servicing this equipment NOTIFY CARRIER OF DAMAGE AT ONCE It is the responsibility of the consignee to inspect the container upon receipt of same and to determine the possibility of any damage including concealed dam mn age Unified Brands suggests that if you are suspicious of damage to make a FOODSERVICE EQUIPMENTEGLUTONE notation on the delivery re
29. as Feed Rate Feed Rate Tri Res 20G NG 60 000 3 50 WC 5 WC 14 WC Tri Res 20G LP 60 000 10 0 WC 12 WC 14 WC In Canada the installation must conform to the Canadian Gas Code CAN 1 B1 49 Installation Codes for Gas Burning Appliances and Equipment and or local codes WARNING For unit installed on customer supplied stands casters are required with restraining requirement as listed After the unit has been connected to the gas supply all gas joints must be checked for leaks Do not use flame checking for leaks thick soap solution or other suitable leak detector should be used CALL 888 994 7636 FOR TECHNICAL SUPPORT 13 INSTALLING CLEANING AND TESTING GROEN D Anchor restraining cable bracket to a secure structure CAUTION One of the preferred locations is on the concrete floor using tee Ar we anchor bolts not provided as shown below When the unit is moved from its original position for WIDE cleaning or service the hooks on the restraining cable assembly must be reconnected at both ends Detailed Instructions for the re connection to the appliance are shown below under Unit Restraining Requirement Unit Restraining Requirement A The installation shall be made with a connector that com plies with the standard for connectors for movable gas appli ances ANSI Z21 69 CSA 6 16 and a quick disconnect device that complies with the standard for quick disconnect devices for use with gas fuel
30. bar should go out v IMPORTANT replace the Hi Limit connector on J8 vi Push the FAN SPEED HI button vii The Fan Current bar should light viii Release HI and push LO ix The bar should light again x Release the button xi The bar should go out xii If not then check the connections and the fan motor 22 TEMP KNOB This test checks the temperature knob the upper knob Turn it clockwise The TEMPERATURE display should increase in five degree steps from 200 to 450 23 ALL ON This test checks everything lights up Look at all LEDS seven segment displays and decimal points Everything should be lit If not then replace the control board 24 EXIT This js the way out of the diagnostics Push START The control board resumes normal operation CALL 888 994 7636 FOR TECHNICAL SUPPORT 27 ASSEMBLY DISASSEMBLY 5 1 General Information This section provides common removal and install procedures for parts in more than one mode of the Tri Res When Part Numbers differ by Tri Res Model the Part Numbers are not given in this section The following procedures are based upon having access to the Tri Res on all four side If the Tri Res is installed between other appliances and there is not enough room on the sides for access the Tri Res must be pulled out from its position to gain proper access Care should be taken in moving the Tri Res so as not to stress or pull on the electrical gas and water connections WARN
31. ceipt It will be the responsibility of the consignee to file A DOVER comp a claim with the carrier We recommend that you do so at once Manufacture Service Questions 888 994 7636 1055 Mendell Davis Drive Information contained in this document is known to be current and accurate at the time Jackson MS 39272 of printing creation Unified Brands recommends referencing our product line websites snd epee 888 994 7636 fax 888 864 7636 unifiedbrands net for the most updated product information and specifications groen com PART NUMBER 152797 REVISION A TABLE OF CONTENTS GROEN INTRODUCTION PAGE 1 1 The Groen Serie 60 ak adr 4 1 2 NTE ENE 4 1 3 Warranty and Non Warranty Repair des ele paws 4 1 4 tlie hl eae A ok Ae hak oats oh 0 eke ees 4 1 5 Glossary 00220 0 EE ee 5 1 6 Tools and Supplies ES EM eek 5 1 6 1 CCUG AA 5 1 6 2 0 5 1 6 3 Helpful Hardware tos rad 22 ias at id ta 5 1 6 4 Recommended 5005 5 1 7 HowTo Use This Manual 9 0 6 OPERATION 2 1 A rene Gg 0 0 3 8 5 86 9 808 for 28 903 8 8 8 8 859 ioa 7 2 2 BNIaNINGIRIOGBNMN EE 8 9 10 11 2 3 COMO ected cate She Sek ewan NN NE eared el 12 INSTALLING CLEANING AND TESTING 3 1 Gas Model Installation 13 14 3 2
32. e component failure MINIMIZE SCALE PROBLEMS BY INSTALLING AND MAINTAINING A GROEN WATER TREATMENT SYSTEM AND BY DELIMING THE STEAM GENERATOR BOILER REGULARLY PART NUMBER 152797 REVISION A GROEN Groen Tri Res ovens feature two separate water inlets one for the steam generator for treated water the other for the spray condenser untreated water and semi automatic wash cycle The second intake will reduce water treatment requirements resulting in significant savings The dual water connections are on the rear of the unit CALL 888 994 7636 FOR TECHNICAL SUPPORT 17 INSTALLING CLEANING AND TESTING 3 4 General Cleaning To keep your Tri Res in proper working condition use the fol lowing procedure to clean the unit This regular cleaning will reduce the effort required to clean the steam reservoir and cavity Suggested Tools Mild detergent or vinegar Stainless steel exterior cleaner such as Zepper Cloth or sponge Spray bottle Nylon pad Towels Plastic disposable gloves e 9 9 9 9 lt B Procedure Exterior Cleaning a Prepare a warm solution of the mild detergent as instructed by the supplier Wet a cloth this solution and wring it out Use the moist cloth to clean the outside of the unit Do not allow freely running liquid to touch the controls the control panel any electrical part or on the side or rear panels b To remove material which may be stuck to the unit use a fiber brush or a plastic
33. e OVEN indicator lights All three reservoirs empty The temperature knob operates the same way as in COMBO LO with an upper limit of 450 degrees All three burners cycle on and off to maintain the selected temperature Typical Operations The following is a sequence of events typical on the Tri Res 1 Preheating When the power switch is turned on the burners light and raises the cavity temperature to 200 degrees the set point No cooking mode has been selected and the display shows SELECT MODE on the first line and PREHEAT on the second line If the temperature is below 180 degrees when the power switch is turned on it means that the flue is cold In this case only the center burner is turned on for the first two minutes and the cavity fan is off to allow the flue to heat gradually This prevents the pilot flame from being drawn away from the flame sensor due to a strong draft that would be present if all three burners were turned on with a cold flue After the two minutes all three burners are lit Three minutes later the cavity fan oper ates at low speed When the temperature rises above 180 degrees 20 degrees below the set point PREHEAT disappears from the display The fan is allowed to operate at the selected speed The tempera ture continues to rise to the set point at which time the burners cycle on and off to keep it there At any time the user may se lect any cooking mode However if steam or combo modes are selected water wi
34. e an assistant look at the burner to verify If not check the connections igniter and gas supply to the oven 19 AUXILIARY VALVES This test checks the two auxiliary gas valves and the two side burners Push START The auxiliary gas valves will click and the main burners will light Have an assistant look at the burner to verify If not check the connections igniter and gas supply to the oven 20 PRODUCT CODE This test checks the product code jumper in the ribbon cable connector to the control board The red display should show 001 for the gas oven If this is not the case check that the proper ribbon cable has been installed and that all connecters are pushed in firmly If necessary replace the ribbon cable 21 SENSORS This test checks the two water level sensors the door sensor the high limit sensor the fan current sensor and the latching relay The chart shown below represents the horizontal segments in the TEMPERATURE display When a bar is on it indicates that the CALL 888 994 7636 FOR TECHNICAL SUPPORT 26 TROUBLESHOOTING corresponding sensor is on Level 1 Hi Limit Power On Level 2 Fan Current Door During this test various push buttons operate valves and the fan motor START controls the water inlet valve for the center reservoir CANCEL controls the inlet valves for the two side reservoirs MOISTURE LEVEL HI controls the center reservoir drain valve MOISTURE LEVEL LO controls the drain valves for t
35. e version is shown in the red TEMPERATURE display This is useful to determine ifthe oven contains the latest firmware release When STEAM COMBO OVEN and CLEAN are pushed at the same time it takes two hands to do it the diagnostics are started The first diagnostic is Diagnostics Exit Push START to exit the diagnostics and return to normal operation Or rotate the TIMER knob the lower knob to select the desired diagnos tics When finished select Diagnostics Exit and push START Cleaning It is best to clean the oven when it is at room temperature However it may be cleaned right after cooking that is while it is hot First turn off whatever cooking mode is currently on by pushing its button For example if the oven is in steam mode the STEAM indicator is on push the STEAM button The indicator will go out showing that no cooking mode is currently selected If the oven is off turn it on with the power switch Push CLEAN The message OPEN DOOR AND REMOVE RACKS appears in the display Do what is says When the door is open the message changes to SPRAY CLEANER AND CLOSE DOOR Do it When the door is closed the message changes to CLEAN MODE SOAK TIME and the oven rests for two minutes to allow the cleaner to work A counter in the second line of the display shows the number of seconds remaining in each timed cleaning step Then the rinse valve opens for one minute message is CLEAN MODE RINSE TIME to flush the cleaner off the cavity
36. econd rinse cycle 10 After the second rinse cycle the oven will drain and the display will read CLEAN COMPLETE TIME LEFT for a minute then it will shut completely down 11 At this time you may open the door and leave it open to air dry oven interior 12 To repeat the clean cycle turn POWER switch to ON and press CLEAN again 13 Power may be turned off at any time during the clean cycle When power is turned on again the display reads PUSH CLEAN TO FINISH CLEANING Push the CLEAN button to resume cleaning no other cooking mode buttons will operate until the clean cycle is complete CALL 888 994 7636 FOR TECHNICAL SUPPORT 19 INSTALLING CLEANING AND TESTING Deliming Tri Res is designed to require only a daily cleaning of the cavity pan racks steam lid and water level probes to control scale build up When the unit is used in heavy duty continuous operation in an area with extreme hard water Additional steps should be taken to remove lime build up The following procedure outlines steps for optional periodic deliming for Tri Res in heavy duty applications and extreme water conditions The frequency of the deliming depends upon the severity of the scale build up and individual operators but typically would not be more frequently than bi monthly Recommended Tools amp Cleaners a Nylon scrub pad cloth or sponge Scotch BriteTM medium duty scrubbing sponges preferred DO NOT use metal scrub pads b Delimer Descaler
37. es CAUTION Do not install the unit with the rear vents blocked or within 6 inches of a heat source such as a braising pan deep fat fryer charbroiler or kettle To avoid drainage problems level the unit front to back and pitch it slightly to the rear Although Groen recommends the Tri Res is installed near non combustible surfaces the following minimum clearances are to any surface combustible or non combustible Right Side 6 inches Left Side 6 inches GC cchadineititientin dietitians 0 inches from motor Recommended Service Clearances Right AA 14 inches Left Side 6 inches Reduser 24 inches OAI A 25 29 22 36 inches The Tri Res must be installed in a well ventilated room with an adequate air supply The Tri Res must be installed beneath a ventilation hood since gas combustion products exit the appliance Any item which might obstruct or restrict the flow of air for combustion and ventilation must be removed Do not obstruct the flue cover or rear vents after installation The area directly around the appliance must be cleared of all combustible material The installation must conform with lo cal codes or in the absence of local codes with the National Fuel Gas Code ANSI Z223 1 NFPA 54 or the Natural Gas and Propane Installation Code CSA B149 1 The unit and it individual shutoff valve must be disconnected PART NU
38. he message changes to COOLING When the oven has cooled sufficiently to allow it to continue the message CLOSE THE DOOR is displayed When the door is closed the oven enters the cleaning cycle at the first rinse step It rinses twice displays CLEAN COMPLETE TIME LEFT and turns itself off Once a deliming cycle has been started all other cooking modes are inactive locked out The deliming cycle must run to completion before the oven will operate in the cooking modes The oven may be turned off at any time during the deliming cycle However since the two rinses have not been complete there is probably some delimer in the cavity reservoirs When the oven is turned on again it remembers that it was inter rupted in the middle of the deliming cycle The message is PUSH CLEAN TO FINISH CLEANING Do it no other cooking mode buttons will operate The oven enters the clean cycle at the rinse step to remove all delimer from the reservoirs and it shuts itself off It can then be turned on and operated in any mode PART NUMBER 152797 REVISION A CALL 888 994 7636 FOR TECHNICAL SUPPORT 11 CONTROLS GROEN Information Display Console This is a two line display that shows various operating functions of the unit and other operating information START Push this button to start kitchen timer see Timer below INFORMATION DISPLAY CONSOLE CANCEL Push this button to shut off the beeper after timer times out STEAM Push to cook in convection steamer mode
39. he two side reservoirs All four of these are push on push off The FAN SPEED HI and FAN SPEED LO push buttons control the cavity fan motor These two are momentary a Begin the test with all valves closed that is with the corresponding LEDs off i Push START to begin filling the center reservoir ii In about a minute the water level will rise and contact the center water level probe iii The Level 1 bar will turn on iv Push START again to turn off the water inlet valve v Push MOISTURE LEVEL HI to open the center drain valve vi Inless than a minute the Level 1 bar will turn off vii If not check the connections and clean the level probe b Repeat the test in the two outer reservoirs using the CANCEL and MOISTURE LEVEL LO push buttons c Open the door The Door bar should light Close the door The bar should go out PART NUMBER 152797 REVISION A GROEN If not check the connections the magnet in the door the door alignment and the door sensor inside the control panel housing d The power switch should be on and the Power On bar should be lit If not then push the ON switch e Onthe Relay board unplug the Hi Limit connector two white wires in a small 4 pin connector from J8 near the center of the board i Use a small screwdriver and short the center and right pins of J8 together ii The Hi Limit bar should light and the Power On bar should go out iii Remove the screwdriver iv The Hi Limit
40. hen open the door and while supporting the weight of the door remove hinge pin or remove door to hinge bolts 2 Place the door on a flat clean table or similar support with gasket facing up Be careful not to scratch door surface 3 Inspect door gasket for signs of cuts or other defects which may impair its function Replace if necessary NOTE Gasket not covered under terms of warranty Installation 4 To install the door apply NEVER SEEZ lubricant to hinge pin Align door with and insert hinge pin or apply Locktite 242 to the door to hinge bolts then install door and mounting bolts Snug bolts only Do NOT tighten mounting bolts at this time Alignment 5 Place a piece of masking tape over the door latch pin bul let hole in the door CALL 888 994 7636 FOR TECHNICAL SUPPORT 29 ASSEMBLY DISASSEMBLY 6 Close the door until the latch pin just penetrates the mask ing tape Make sure the door pin contacts only the door latch spring 7 If door pin does not strike the center of the masking tape or spring hole in the U channel loosen the hinge to oven bolts and align the door to the door pin Tighten to oven mounting bolts 8 You should be able to pull a dollar bill or comparable piece of paper with some effort from between the gasket and Tri Res cavity with the door closed To adjust the hinge side loosen the door to hinge bolts and align the door gasket with the oven cavity Tighten the door to hinge mounting bolts
41. ire may be shorted there is a problem in the gas distribution system or the main gas valve may be shut off Fan not running The cavity fan stopped running It may be open or one of its connectors may have become disconnected PART NUMBER 152797 REVISION A GROEN All fills long The water level in all three reservoirs didn t reach the water level probes within the allotted time while filling The probes may be dirty clean them the level probe harness wires may have become disconnected the water may be turned off the fill valves may be defective or may be disconnected or the drains are stuck open Fill 1 too long The water level in the center reservoir didn t reach the center water level probes within the allotted time See All fills long Fill 2 too long The water level in the side reservoirs didn t reach the right water level probe within the allotted time See All fills long All drains long The water level in all three reservoirs didn t drop below the water level probes within the allotted time while draining The probes may be dirty clean them the drains may be plugged or the drain valves may be stuck closed Drain 1 too long The water level in the center reservoir didn t drop below the center later level probe within the allotted time See All drains long Drain 2 too long The water level in the side reservoirs didn t drop below the right later level probe within the allotted time See All drains long
42. ity is still hot The muffin fans continue to operate until the temperature drops below 180 degrees 9 Light When the LIGHT button is pushed the door lights turn on to illuminate the cavity When the button is released the lights stay on for five seconds and automatically turns off 10 Condensate spray When a steam water valve is first turned on a large puff of steam may be created if the water is sent to a hot reservoir Part of this puff of steam goes out the overflow drain During this time the condensate spray is turned on for 45 seconds to condense the steam and cool it When a drain valve is opened it discharges hot water into the CALL 888 994 7636 FOR TECHNICAL SUPPORT 9 OPERATION oven drain During this time the condensate spray is turned on for 90 seconds to cool the drain water During the remaining time that is most of the time the con densate spray is turned off to conserve water 11 Secret buttons There is an unmarked button under the text display window about inch above the O in Groen When this button is pushed the TEMPERATURE display shows the actual measured temperature in the cavity This is useful for diagnosing heating and cooling under normal operation During normal operation it is necessary to push only one button at a time Special features may be called by pushing a combina tion of buttons at the same time When STEAM COMBO and OVEN are pushed at the same time the currently installed firmwar
43. ity walls it shuts itself off It can then be turned on and operated in any mode Deliming The oven may be delimed at any temperature However since it is necessary to remove the steam lid from the inside of the cavity the oven should be allowed to cool before starting the procedure First turn off whatever cooking mode is currently on by pushing its button If the oven is off turn it on with the power switch Push LIGHT While the LIGHT is on push CLEAN The message OPEN DOOR AND REMOVE STEAM LID appears in the display This indicates that the oven is in deliming mode If the message OPEN DOOR AND REMOVE RACKS appears it means that the LIGHT was not on while CLEAN was pushed You have another chance to put the oven in delime mode Push LIGHT again While the LIGHT is on push CLEAN The STEAM LID message should appear Open the door and remove the steam lid from the bottom of the cavity The messages changes to ADD DELIMER AND CLOSE DOOR Water begins to fill the three reservoirs and the heaters turn on Pour 1 3 cup of delimer into each reservoir 1 cup total Close the door The message changes to DELIME MODE TIME LEFT The oven CALL 888 994 7636 FOR TECHNICAL SUPPORT 10 OPERATION GROEN will steam for 20 minutes the display shows the number of seconds remaining and drain for two minutes message is DE LIME MODE DRAIN TIME At this time the oven is hot and the message changes to OPEN DOOR TO COOL OVEN When the door is opened t
44. ll not enter the reservoirs until the tempera ture rises above 200 degrees 2 Flame out detection When the oven is started the cavity temperature should rise at least 50 degrees in ten minutes If the burner didn t start or has gone out the temperature at that time will be too low The mes sage Burner not on Relight is displayed and the oven turns itself off Push the ON switch to relight the burner CALL 888 994 7636 FOR TECHNICAL SUPPORT 8 OPERATION 3 Ready indication The ready condition is satisfied the oven is ready when the cavity temperature is less than 20 degrees below the set point In the idle condition no cooking mode selected the set point is 200 degrees In steam mode it is 250 degrees In combo and oven modes it is whatever is set in the temperature display When the oven is not ready the word PREHEAT is displayed or the temperature display flashes Once the oven comes up to ready PREHEAT disappears and the temperature display stops flashing If the door is opened and the oven is loaded with cold food the cavity temperature will fall However since the ready condition has already been met the temperature display will not start flashing If the cooking mode or the temperature setting is changed then the oven will resume flashing if the current cavity temperature is more than 20 degrees below the new set point that is the oven is not ready Once ready is achieved with the new settings the flashing stops 4
45. o test Press ON switch LEDs on control board illumi 24 volt control transformer Measure 120vac in and 24vac Hi limit auto reset Run sensor diagnostic Control board or Relay board Substitute to test 0 lncoedwiimw Check per wiring diagram Fill Valve Fill valve is normally open when water is below water level sensor 24VAC is applied to coil or valve and it opens When water reaches the level sensor the coil de energizes Run fill valve diagnostic Drain valve Without power the valve 5 open when 24VDC is applied to the coil or the valve it ener gizes to prevent draining Run drain valve diagnostic fan coil Substitutetotest Press ON switch Audible click a gas valve opens Check per wiring diagram Verify 24VAC across valve coil About 20 minutes after clos ing the door the oven comes to ready the temperature indicator stops flashing Gas valve Verify 24VAC across valve coil PART NUMBER 152797 REVISION A CALL 888 994 7636 FOR TECHNICAL SUPPORT 22 TROUBLESHOOTING GROEN GAS ORIFICE SIZE CHART ALTITUDE ABOVE SEA LEVEL IN FEET Igniter Tube Burner Burners Orifice Size Part No Burners Orifice size Part No ST 0 020 476 1 1 0085 454 er EM er EM er ef EN up to 2000 2001 4000 4001 6000 6001 8000 8001 10000 up to 2000 2001 4000 0 020 76 0 052 55 0 020 76 0 049 1 25mm 0 018 0 45mm 0 047 1 20mm 0 018 0 45mm 0 0465
46. obstructions in the line Failure to observe these requirements may cause a water trap in the drain line and produce enough back pressure to prevent proper cavity draining resulting in condensate water leaking from the door Drain line must NOT be made of plastic pipe It must be able to withstand boiling water Steam Free Zone The Tri Res can be damaged by steam from external sources Do not install the unit over a steam venting drain Ensure that steam is not present in an area bounded by the footprint of the unit and a circle 18 inches in radius about the right and left rear corner of the unit see figure below Tri Res top view CALL 888 994 7636 FOR TECHNICAL SUPPORT 15 INSTALLING CLEANING AND TESTING 3 3 Installation Checklist General Refer to section 3 3 for proper clearances Do not install Tri Res directly above steam venting Make sure the unit rear vents are not blocked and the unit is not within 6 of a heat source Make sure Tri Res 15 level or pitched slightly to the rear Check that fan js clean and clear of foreign materials Gas Connection Checks Make sure the installation conforms to local codes Make sure Tri Res is installed under a ventilation hood Check that the flue and all vents are free of obstruction Check that gas supply is 5 W C min to 14 W C max for natural gas and 12 W C min to 14 W C max for propane Check that gas supply piping is 1 2 NPT Verify operating
47. only Groen personnel or authorized Groen representatives should perform the work Always supply water with a low mineral content that meets the standards outlined in the Water Quality and Treatment section of this manual on page 17 1 Daily a With a wet cloth clean the interior and exterior outer panels of the oven b Remove the condensate drip pan located below the door drain clean and allow the drip pan to air dry c After cleaning the oven interior leave the door slightly open to allow the oven to air dry d Open the inner glass door and check both inner and outer glass for cracks or signs of loose fitting If cracks are found do not operate the unit until the glass is replaced 2 Weekly a Delime the interior per deliming procedure described in this manual on page 20 b Remove all interior baffles as part of the cleaning procedure and clean the Water level probes with a non abrasive stiff brush Two 2 water level probes are located on the rear wall of the unit below the fan Liquid Level Probes c Open the inner glass door and check the light assembly for proper operation and fit PART NUMBER 152797 REVISION A GROEN 3 Monthly a Check the hinges and other moving parts of the inner and outer glass doors for smooth operation and signs of misalignment or wear If the door does not move freely or sags do not operate the unit until corrected See Door adjustment note below b Check
48. ose the oven door the rinse valve won t open if the door is open Push START The rinse nozzle in the back of the oven cavity should spray water all over the cavity Release START The water should stop If not check the connections water valve and water supply to the oven 16 DRAIN VALVE 1 This test checks the drain valve for the center reservoir Push START Check that the plunger on the center drain valve rises If there is water in the center reservoir it should begin to drain out Release START The plunger should drop back down If not check the connections and the drain valve 17 DRAIN VALVE 2 This test checks the drain valves for the outer two reservoirs PART NUMBER 152797 REVISION GROEN Push START Check that the plunger on the outer two drain valves rises If there is water in the any of the outer reservoirs it should begin to drain out Release START The plunger should drop back down If not check the connections and the drain valve 18 MAIN VALVE This test checks the igniter the pilot and pilot valve the flame sensor the main gas valve and the center burner Make sure the POWER switch is on Push ON if necessary Look at the burner assembly and verify that the pilot is on If not then check the LED on the igniter If it is flashing then turn the power off for a few seconds and back on again Check for pilot Push START The main gas valve will click and the main burner will light Hav
49. ous situation DANGER WARNING AND CAUTION DANGER The signal word DANGER indicates that a hazardous situation exists and could result in serious injury or death e Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance e When you open the Tri Res door be very careful to avoid escaping steam Steam can cause burns e After removing the fan baffle partition do not put your hands or other object into the cooking cavity until the fan comes to a complete stop Rotating fan blades can cause severe injury CALL 888 994 7636 FOR TECHNICAL SUPPORT 4 INTRODUCTION WARNING The signal word WARNING tells you that a pos sibly hazardous situation is present and if not avoided could cause serious injury or death e Always turn off the Tri Res power before removing partitions or panels e Disconnect the Tri Res from the power source before per forming any service CAUTION The signal work CAUTION warns you of a haz ardous situation which if not avoided may result in minor or moderate injury e Tri Res may be hot Take precautions to prevent any contact with hot surfaces e Be sure all interior partitions have been installed before operating the Tri Res e All Tri Res operators and service personnel should be familiar with correct and safe operating procedures e Be sure Tri Res drain is not blocked as this could result in improper Tri Res operations Two other signal
50. out 9 MUFFIN FAN This test checks both muffin fans on the right side of the oven Push START Both muffin fans should operate If not check the connections and replace the inoperative fan 10 FAN HI This test checks the cavity fan at high speed Push START The fan should run at high speed If it doesn t check the connections and the fan motor 11 FAN LO This test checks the cavity fan at low speed It is similar to the previous test CALL 888 994 7636 FOR TECHNICAL SUPPORT 25 TROUBLESHOOTING 12 STEAM VALVE 1 This test checks the steam water inlet valve for the center reservoir Push START Water should flow into the center reservoir Release START Water should stop flowing If not then check the connections water valve and water supply to the oven 13 STEAM VALVE 2 This test checks the steam water valves for the outer two reservoirs Push START Water should flow into the outer two reservoirs Release START Water should stop flowing If not then check the connections water valve and water supply to the oven 14 SPRAY VALVE This test checks the condensate spray valve Push START The condensate spray hose at the drain box should jump a bit when water starts After a few seconds water should flow out of the drain hose Release START The water should stop If not check the connections water valve and water supply to the oven 15 RINSE VALVE This test checks the rinse water valve Cl
51. s three blinking dashes until the temperature rises above 230 degrees After that the display shows three steady dashes indicating that the steaming temperature has been reached the ready condition The temperature continues to rise When it is above 250 degrees the outer two burners go off and the center burner continues to operate The temperature levels off somewhere around 350 degrees depending on the food load in the cavity If the door is opened and the cavity is loaded with cold food the temperature may drop below 250 degrees All three burners light to bring the tempera ture up quickly B Push COMBO to start the combo mode The COMBO and LO moisture level indicators light The center reservoir fills with water Adjust the TEMPERATURE knob the upper knob for the desired cooking temperature the lower limit is 200 degrees the upper limit is 450 degrees If the cavity temperature is more than 20 degrees below the selected temperature the TEMPERATURE display flashes until the temperature is within 20 degrees of the selected tempera ture the ready condition All three burners cycle on and off to maintain the selected temperature PART NUMBER 152797 REVISION A GROEN 6 Push Moisture Level HI The HI indicator lights The two side reservoirs fill and the center reservoir empties The temperature knob operates the same way as in COMBO LO except that the upper limit is reduced to 350 degrees D Push OVEN to start oven mode Th
52. t delivered to our customers has been inspected and tested for compliance with the specifications e Groen certifies that all parts required for service and maintenance will be readily available e Groen certifies that this manual will be updated by means of periodic service bulletins to provide the most up to date information for field maintenance and service personnel PART NUMBER 152797 REVISION A GROEN 1 3 Warranty and Non Warranty Repair Groen Warranty provisions are clearly presented in the customer s Operator Manual Certain procedures for the cleaning and or adjustment of the Tri Res are presented in this manual for reference but not war ranty related 1 4 Safety The Groen Tri Res has been designed with safety in mind This includes safety to the operating and maintenance personnel safety to the facility in which the equipment is installed and safety to the equipment itself The Tri Res has been designed to the highest industry standards and has been certified by the National Sanitation Foundation Testing Laboratory NSF Underwriters Laboratory UL and or CSA gas The Tri Res contains several devices which are specifically used to prevent unsafe conditions If they are disconnected dur ing service make sure they are reinstalled properly and tested before the Tri Res is operated The safety precautions in this manual are in accordance with ANSI 535 Standard Three different signal words alert you to a hazard
53. t is completely removed Installation 1 Install new door gasket around inner panel as shown in the illustration Be sure the inner door panel flange is full inserted into the door gasket groove 2 Apply a high temperature silicone sealant such as GE RTV 159 or equivalent to the four door spacers 3 Apply Locktite 242 to inner door panel mounting screws 4 Install inner door panel and door gasket on the door spac ers and tighten mounting screws 5 Align door with hinge and insert hinge pin OR apply Locktite 242 to the door to hinge bolts then install door and mounting bolts Do NOT tighten mounting bolts at this time 6 Align door to Tri Res and tighten bolts Please refer to 4 8 for alignment procedure 5 10 Water Level Probe Removal 1 Turn off the Tri Res power and disconnect the Tri Res from the branch circuit 2 Remove the rear cover from the Tri Res 3 Disconnect the water level probe harness wire 4 Loosen and remove the hex locking nut and washer 5 Remove the probe Installation 6 Insert the new water level probe 7 From the outside put on any washer and locking nut Tighten nut finger tight and then another 1 4 turn to prevent any water leaks 8 Attach the harness wire 9 Turn on the branch circuit power supply 10 Turn ON the Tri Res and test CALL 888 994 7636 FOR TECHNICAL SUPPORT 30 ASSEMBLY DISASSEMBLY GROEN 5 11 Burner 38 Remove the side access plate by removing the two 10x32
54. the board from ten studs on the front panel Be careful not to lose the metal washers below the panel CALL 888 994 7636 FOR TECHNICAL SUPPORT 28 ASSEMBLY DISASSEMBLY Installation 4 Position the board on ten studs 5 Install 6 32 lock nuts with washers Use a 5 16 socket to tighten them in place 6 Insert ribbon jack Press firmly to make sure the jack is fully seated on the board 7 Replace the knobs 8 Replace the control board housing and six nuts behind the housing tighten 9 Replace the side panel and screws tighten 5 5 Relay Board P N 160651 Removal 1 Unplug all connectors 2 Using 5 16 socket remove four 6 32 lock nuts and remove the board from four studs on the high voltage panel Installation 3 Position the board on four studs on the high voltage panel 4 Install 6 32 lock nuts onto the studs and tighten in place using a 5 16 socket 5 Insert all jacks in the same connector locations as per removal Press firmly to make sure each jack is fully 568160 on the board 5 6 Reservoir Drain Valves P N 152915 Note When the steam reservoir drain valves are deenergized or OPEN the silicone hose can be freely threaded through the valve 15 located to the right of the steamer cavity Removal 1 Turn off power and disconnect Tri Res from branch circuit Remove right side panel Let Tri Res drain completely 2 Using spring clamp pliers disconnect ONE END of the sili cone drain hose b
55. tor Seal Assembly 071299 1 4 Motor Mount Insulation Plate 152826 1 5 Motor Mount Standoff Assembly 152827 1 6 5 O D Fan 152640 1 7 Screw Hex Head Cap 1 4 20 005608 4 8 Nut Hex Keps 1 2 20 012940 4 PART NUMBER 152797 REVISION A CALL 888 994 7636 FOR TECHNICAL SUPPORT 35 PARTS IDENTIFICATION 6 4 Water System Assembly No Description Part No Qty 1 Insulation Assembly 152942 1 2 Weldment Box Drain 152877 1 3 Valve Water Feed 3 4 R 090827 1 4 Valve Water Feed 3 4 R 071235 1 5 Water Valve Mounting Bracket 152554 1 6 Fitting Compression 057218 1 7 Spray Nozzle 154335 1 8 Probe 2 1 16 Water Level 141285 2 9 Hose Silicone 7 5 Long 0 1 Thk 0 75 OD 152946 1 10 Hose Silicone 9 5 Long 0 0625 Thk 0 75 OD 152947 1 11 Hose Silicone 9 Long 0 0625 Thk 0 75 OD 152949 1 12 Hose Silicone 8 625 Long 0 0625 Thk 0 75 OD 152949 1 13 Copper Wash Line 23 75 Long 0 0625 Thk 0 5 OD 0 1 14 Hose Silicone 23 625 Long 0 0625 Thk 0 5 OD 152951 1 15 Hose Silicone 15 5 Long 0 0625 Thk 0 5 OD 152952 1 16 Hose Silicone 11 5 Long 0 0625 Thk 0 5 OD 152953 1 17 Hose Silicone 15 625 Long 0 0625 Thk 0 5 OD 152954 1 18 Clamp Hose 2 1 4 Dia 073259 2 19 Clamp Hose Low Pressure 093482 6 20 Fan 24VDC M
56. ture display red LED will stop flashing In combination mode Temperature display red LED will stop flashing In steamer mode The dashes in temperature display red LED will stop flashing 7 In order to use the timer To set or change time push START to start timer rotate the knob to desired setting At the end of time cycle the beeper will sound and the red CANCEL light will flash To stop flashing push CANCEL button at top PART NUMBER 152797 REVISION A CALL 888 994 7636 FOR TECHNICAL SUPPORT 7 OPERATION Operating Procedure 1 Press the ON switch on the control panel SELECT MODE and PREHEATING are displayed The burner will light indicated by the in the upper right corner of the display When the temperature in the cavity rises above 180 degrees PREHEATING disappears from the display The temperature levels off at 200 degrees F burners cycle on and off 2 Load food into pans in uniform layers Pans should be filled to about the same levels and should not be mounded 3 Open the door and slide the pans onto the racks If only one or two pans will be cooked put them on the middle rack 4 Close the door and take one of the following steps A Push STEAM to start the steaming mode The STEAM indicator will light All three burners light When the temperature is above 200 degrees the three reservoirs fill with water If STEAM was pushed while PREHEATING was displayed the TEMPERATURE display show
57. uffin 80MM 153505 1 21 Valve Drain 5 8 ID 152915 3 22 Fan 24VDC Muffin 80MM 153505 1 PART NUMBER 152797 REVISION A Os o T LI o CALL 888 994 7636 FOR TECHNICAL SUPPORT os 36 PARTS IDENTIFICATION GROEN 6 5 Gas Valve and Piping Assembly No Description Part No Qty 1 Valve Gas Johnson Controls NAT 098443 2 Nipple 1 2 NPT x Close 008877 3 Union 3 8 NPT 005686 4 Nipple 1 2 NPT x 3 Long 005553 5 Elbow 90 DEG 1 2 NPT 008747 6 Nipple 1 2 NPT 4 Long 005554 7 Valve Gas 1 2 098458 8 Fitting Compression 90 004584 9 Manifold Gas 3 Burner 152807 10 Plug Pipe 1 8 NPT Recessed Hex 010286 11 Pipe Dope 078938 12 Valve Gas 24 Volt HY 6G 099906 13 Fitting Compression 057218 14 Connector Male 3 8 152544 15 Hose Flex 1 4 Line Pilot 24 Long 152544 16 Hose Flex 1 4 Line Runner Tube 33 Long 152892 17 Hose Flex 3 8 Line Burner 28 Long 152893 18 Hose Flex 3 8 Line Burner 28 Long 152893 19 Hose Flex 3 8 Line Burner 20 Long 152894 20 Natural to Propane Gas Conversion Kit not shown 152736 21
58. walls This is followed by a two minute drain period CLEAN MODE DRAIN TIME followed by another one minute rinse When this is com PART NUMBER 152797 REVISION A GROEN plete the message CLEAN COMPLETE TIME LEFT is displayed for a minute and the oven turns itself off If the oven is hot at the beginning of the soaking period the message OPEN DOOR TO COOL OVEN is displayed Do it While the door is open the message COOLING is displayed When the oven has cooled sufficiently to allow it to continue the message CLOSE THE DOOR is displayed Do it The cleaning cycle starts with the message OPEN DOOR AND REMOVE RACKS At any time during the cleaning cycle the user may open the door and spray more cleaner in the cavity When the door is closed the cycle starts over with the soaking period followed by the two rinses Once a cleaning cycle has been started all other cooking modes are inactive locked out The cleaning cycle must run to comple tion before the oven will operate in the cooking modes The oven may be turned off at any time during the cleaning cycle However since the two rinses have not been complete there is probably some cleaner on the cavity walls When the oven is turned on again it remembers that it was interrupted in the middle of the cleaning cycle The message is PUSH CLEAN TO FINISH CLEANING Do it no other cooking mode buttons will operate When the clean cycle is complete all the cleaner has been rinsed from the cav
59. words not directly related to personal safety are also used in this manual NOTICE and IMPORTANT NOTICE is used to highlight an operating or maintenance tip or suggestion IMPORTANT is used to highlight an operating or maintenance tip or suggestion 1 5 Glossary of Terms The following abbreviations and terms are use in this manual BTU British Thermal Unit GPM Gallons Per Minute LED Lighting Emitting Diode MM Millimeter NEC National Electric Code N P T National Pipe Thread NSF National Sanitation Foundation PSI Pounds per Square Inch Pressure ULL Underwriters Laboratory Inc PART NUMBER 152797 REVI GROEN 1 6 Tools and Supplies This Section identifies the tools instruments and supplies which will be required and useful in the inspection repair and testing of the equipment and described in this manual Most likely many of these tools and supplies are already in your tool kits and are used in everyday maintenance Make sure to use only the specified sealants compounds and dressings recommended by Groen CAUTION Care should be taken in using the correct tool as indication Using the wrong tool may inflict damage to the part being removed installed and or adjusted Make sure that the calibrations on instruments are periodically checked for accuracy 1 6 1 Required Tools Screw Drivers Flat Blade No 1 and No 2 Phillips No 1 and No 2 Socket Wrenches 1 4 through 7 8 Nutdrivers metric and inches
60. y loosening the drain fitting coming from the cavity drain Remove clamp 3 Unplug the valve electrical wires 4 With a 5 16 inch nutdriver remove the two 10 32 screws holding the drain valve to the bracket on the Tri Res base 5 Remove the two 10 32 screws and remove the valve from the bracket 6 Loosen the clamp and remove the other end of the silicone hose from the drain box Inspect the hose for any damage or lime buildup Clean or replace the hose if required then reat tach to the steam reservoir drain fitting PART NUMBER 152797 REVISION A GROEN Installation 7 Attach new drain valve to valve bracket Slide the silicone hose through the drain valve housing and install hose clamp over the exposed end of the hose Check that the hose is straight and not twisted 8 Fit the exposed end of the silicone hose onto the elbow of the cavity drain Using spring clamp pliers position and tighten the hose clamp 9 Plug the electrical leads of the valve into the wiring harness Connect Tri Res to branch circuit and turn on power Testing Operate Tri Res sensor diagnostics Check for leaks and observe if drain valve fully closes Turn off Tri Res and observe that drain valve opens and the steam reservoir drains 10 Reinstall right side panel 5 7 Door Removal Installation Alignment For Part Number see Parts Identification Section Removal 1 To remove the door turn off the Tri Res power and allow the Tri Res to cool T

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