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SERVICE MANUAL
IMPORTANT INFORMATION, KEEP FOR OPERATOR
This manual provides information for:
MODELS TRI-RES-20G
& (2)TRI-RES-20G
COMBINATION OVEN
· Self Contained
· Gas Heated
· Capacity:
TRI-RES-20G = 10 Steamer Pans Per Cavity
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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-
age. Unified Brands suggests that if you are suspicious of damage to make a
notation on the delivery receipt. It will be the responsibility of the consignee to file
a claim with the carrier. We recommend that you do so at once.
Manufacture Service/Questions 888-994-7636.
Information contained in this document is known to be current and accurate at the time
of printing/creation. Unified Brands recommends referencing our product line websites,
unifiedbrands.net, for the most updated product information and specifications.
PART NUMBER 152797, REVISION A
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1055 Mendell Davis Drive
Jackson, MS 39272
888-994-7636, fax 888-864-7636
groen.com
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Table of Contents
Summary of Contents for Groen TRI-RES-20G
- Page 1 COMBINATION OVEN · Self Contained · Gas Heated · Capacity: TRI-RES-20G = 10 Steamer Pans Per Cavity 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.
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Page 2: Table Of Contents
The groen Service Concept ........ - Page 3 table of contents parts IdentIfIcatIon Control Panel Sub Assembly ..............33 High Voltage Panel Assembly - gas .
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Page 4: The Groen Service Concept
IntroductIon 1.1 The Groen Service Concept Warranty and Non-Warranty Repair Since 1907 groen has been in the business of designing and groen Warranty provisions are clearly presented in the manufacturing the finest commercial appliances for the food customer’s Operator Manual. -
Page 5: Glossary Of Terms
Make sure forming any service. to use only the specified sealants, compounds and dressings recommended by groen. CAUTION: The signal work CAUTION warns you of a haz- ardous situation which, if not avoided, may result in minor or CAUTION: Care should be taken in using the correct tool as moderate injury. -
Page 6: How To Use This Manual
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... -
Page 7: Startup
NOTE: For operation at high altitudes (2000 feet To turn the unit on, press the ON switch on and above), please consult the Groen the control panel. Engineering Department. When any of the four (4) cooking modes are selected, the main burners will ignite automatically. -
Page 8: Operating Procedure
operatIon Operating Procedure C. 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 1. Press the ON switch on the control panel. SELECT MODE except that the upper limit is reduced to 350 degrees. - Page 9 operatIon 3. Ready indication and out of the cavity without disturbing the burners. However, The ready condition is satisfied (the oven is ready) when the if the door is open for five minutes or more the burners are cavity temperature is less than 20 degrees below the set point. turned off.
- Page 10 There is an unmarked button under the text display window, CLOSE THE DOOR is displayed. Do it. The cleaning cycle starts about ½ inch above the O in groen. When this button is with the message OPEN DOOR AND REMOVE RACKS.
- Page 11 operatIon 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 the message changes to COOLINg.
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Page 12: Controls
controls Controls Information Display Console: This is a two line display that shows various operating functions of the unit and other operating information. INFORMATION DISPLAY CONSOLE START: Push this button to start kitchen timer (see Timer below). CANCEL: Push this button to shut off the beeper after timer times out. STEAM: Push to cook in convection steamer mode. -
Page 13: Installing, Cleaning And Testing
2. Gas Supply Connection Connection to the gas supply shall be in accordance with the Although groen recommends the Tri-Res is installed near non- chart below. Supply pressure must be at least 5” W.C. (maxi- combustible surfaces, the following minimum clearances are to mum 14”... - Page 14 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.
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Page 15: Installation
There must be a 2” air gap to the (non-pressurized) building are to be used by groen customers and Tri-Res test procedures. drain. Make sure that the drain is sloped AWAY and DOWN from the Tri-Res and that there are no obstructions in the line. -
Page 16: Installation Checklist
InstallIng, cleanIng and testIng 3.3 Installation Checklist Tri-Res is shut down overnight or longer. Cold Water Supply Connections General _____ Make sure plumbing connections conform to local _____ Refer to section 3.3 for proper clearances. codes. _____ Do not install Tri-Res directly above steam venting _____ If permitted by local codes, check that hose connec- tion is flexible to allow Tri-Res _____ Make sure the unit rear vents are not blocked and the... -
Page 17: Water Treatment
(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. -
Page 18: General Cleaning
InstallIng, cleanIng and testIng 3.4 General Cleaning WARNING To keep your Tri-Res in proper working condition, use the fol- lowing procedure to clean the unit. This regular cleaning will Disconnect the power supply before cleaning the reduce the effort required to clean the steam reservoir and outside of the Tri-Res. -
Page 19: Interior Cleaning
InstallIng, cleanIng and testIng Interior Cleaning second rinse cycle. 10. After the second rinse cycle the oven will drain and the NOTE: Clean the unit daily or as residue builds upon the display will read CLEAN COMPLETE TIME LEFT for a minute, bottom of the oven cavity. - Page 20 Remove the steam lid from the steam reservoir. pads. NOTE: Use protective gear, including eyewear for the b. Delimer/Descaler – Groen Delimer Descaler (P/N 114800), following steps involving delimer/descaler. Commercial Lime Away or any equivalent. DO NOT use any cleaning or deliming agent that contains Citric Acid, any Sulfa-...
- Page 21 If there is and outer glass doors for smooth operation and signs of a need for service, only groen personnel or authorized groen misalignment or wear. If the door does not move freely representatives should perform the work.
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Page 22: Troubleshooting
troubleshootIng 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. - Page 23 GAS ORIFICE SIZE CHART (ALTITUDE ABOVE SEA LEVEL IN FEET) No. Of Igniter Tube Groen No. Of Burner Groen Elevation Type Burners Orifice Size Part No. Burners Orifice size Part No. up to 2000' 0.029 (# 69 ) 101665 0.089"...
- Page 24 troubleshootIng Fault Messages 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 No product code may be dirty (clean them), the level probe harness wires may The product code (gas or electric) is embedded in the ribbon have become disconnected, the water may be turned off, the fill cable at the controller end.
- Page 25 troubleshootIng DIAGNOSTIC CHECK OF SYSTEM BUTTON This test checks all the control panel buttons. Push all the buttons, one at a time. ENTER DIAGNOSTICS When the buttons are pushed the associated LED lights. Push STEAM, COMBO, OVEN, and CLEAN all at the same time (it If the LED stays lit after the button is released it usually means takes two hands).
- Page 26 troubleshootIng STEAM VALVE 1 Push START. This test checks the steam-water inlet valve for the center Check that the plunger on the outer two drain valves rises. reservoir. If there is water in the any of the outer reservoirs it should begin Push START.
- Page 27 troubleshootIng corresponding sensor is on. If not check the connections, the magnet in the door, the door alignment, and the door sensor inside the control panel housing. Level 1 Hi Limit Power On The power switch should be on and the Power On bar should be lit.
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Page 28: Assembly/Disassembly
assembly/dIsassembly 5.1 General Information 5.4 Tri-Res Control PC Board P/N 160650 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 WARNING given in this section. -
Page 29: Relay Board
assembly/dIsassembly Installation Installation 4. Position the board on ten studs. 7. Attach new drain valve to valve bracket. Slide the silicone 5. Install 6/32” lock nuts with washers. Use a 5/16” socket to hose through the drain valve housing and install hose clamp tighten them in place. -
Page 30: Door Switch
assembly/dIsassembly 6. Close the door until the latch pin just penetrates the mask- 5. Remove and discard door gasket. ing tape. Make sure the door pin contacts only the door latch 6. Clean back of the inner door panel. Be sure old sealant is spring. -
Page 31: Burner
assembly/dIsassembly 5.11 Burner 3a. Remove the side access plate by removing the two 10x32 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 before removing!!!!! Removal 1a. - Page 32 assembly/dIsassembly 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.
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Page 33: Control Panel Sub Assembly
parts IdentIfIcatIon 6.1 Control Panel Sub- Assembly No. Description Part No. Qty. Panel, Control, Tri-Res 151109 Control Panel Mounting Bracket Assembly 152992 Hour Meter, Redington, 149295 Knob, 1.5 Dia 160921 Rocker Switch 160920 Switch, Door 096857 Control Panel Display 152904 Control Board, Tri-Res (not shown) 160650 Overlay, Front Panel Tri-Res (not shown) -
Page 34: High Voltage Panel Assembly - Gas
152997 069789 152641 160651 UNLESS OTHERWISE SPECIFIED THE INFORMATION CONTAINED ON DIMENSIONS SHOWN ARE IN INCHES DOCUMENT IS CONFIDENTIAL AND WITH TOLERANCES AS FOLLOWS: PROPERTY OF GROEN/A DOVER IN DECIMALS ANGLES UNAUTHORIZED REPRODUCTIO .015 ± .XXX ± .5° ± EXPRESSLY FORBIDDEN ±... -
Page 35: Assembly Motor Mount
UNLESS OTHERWISE SPECIFIED THE INFORMATION CONTA DIMENSIONS SHOWN ARE IN INCHES DOCUMENT IS CONFIDEN WITH TOLERANCES AS FOLLOWS: PART NUMBER 152797 REVISION A CALL 888-994-7636 FOR TECHNICAL SUPPORT PROPERTY OF GROEN/A D DECIMALS ANGLES UNAUTHORIZED REPRO .010 ± .XXX ±... -
Page 36: Water System Assembly
parts IdentIfIcatIon 6.4 Water System Assembly No. Description Part No. Qty. Insulation Assembly 152942 Weldment, Box, Drain 152877 Valve-Water Feed 3/4 R 090827 Valve-Water Feed 3/4 R 071235 Water Valve Mounting Bracket 152554 Fitting Compression 057218 Spray Nozzle 154335 Probe, 2-1/16” Water Level 141285 Hose, Silicone, 7.5”... -
Page 37: Gas Valve And Piping Assembly
parts IdentIfIcatIon 6.5 Gas Valve and Piping Assembly No. Description Part No. Qty. Valve Gas Johnson Controls NAT 098443 Nipple, 1/2 NPT x Close 008877 Union 3/8 NPT 005686 Nipple, 1/2” NPT x 3” Long 005553 Elbow 90 DEG 1/2” NPT 008747 Nipple, 1/2”... -
Page 38: Door Assembly
parts IdentIfIcatIon 6.6 Door Assembly No. Description Part No. Qty. Assembly Door Front Single Point Latch 152921 Assembly Panel, Back 151040 Screw Flat HD #10-32 x 3/8” LG 069723 Assembly, Bracket, Single Point, Latch, Door 152924 Hinge, Door, Tri-Res 20g 152007 Screw, Hex Head Cap, 1/4”-20 005608... -
Page 39: Parts Identification
parts IdentIfIcatIon 6.7 Gas Valve and Piping Assembly No. Description Part No. Qty. Weldment, Chmbr, Combustion 152804 Assy-U-Burner, Low Profile 152832 Plate, Damper, Rear, UCS Oven 152810 Weldment, Brkt, Tube, Ignition 152698 Tube, Ignition, U-Burner 152695 Weldment, Bracket, Pilot 152849 Pilot, Ignitor, Low Profile 152693 Orifice Connector Assy... -
Page 40: Wiring Diagram
WIrIng dIagram PART NUMBER 152797 REVISION A CALL 888-994-7636 FOR TECHNICAL SUPPORT... -
Page 41: Ladder Diagram
ladder dIagram PART NUMBER 152797 REVISION A CALL 888-994-7636 FOR TECHNICAL SUPPORT... - Page 42 INSTALLING, CLEANING AND TESTING Notes PART NUMBER 152797 REVISION A CALL 888-994-7636 FOR TECHNICAL SUPPORT PART NUMBER 145702, REV. D (01/08) CALL 888-994-7636 FOR TECHNICAL SUPPORT CALL 888-994-7636 FOR TECHNICAL SUPPORT PART NUMBER 145702, REV. B (7/06) PART NUMBER 145702, REV. C (01/07) Call 1-800/676-9040 for Technical Support...
- Page 44 PART NUMBER 152797 REVISION...