Gram BAKER GA 550 Operating And Service Manual
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Gram BAKER GA 550 Operating And Service Manual

Gram BAKER GA 550 Operating And Service Manual

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Operating- and servicemanual
BAKER GA 550 / 950
 
 
 
 
765042113
Rev. 001
1

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Summary of Contents for Gram BAKER GA 550

  • Page 1 Operating- and servicemanual BAKER GA 550 / 950         765042113 Rev. 001...

  • Page 2: Table Of Contents

        Contents   Safety information ........................... 4  Location ..............................5  Placement of multiple units next to each other ................... 7  General description ..........................8  Electrical connection ..........................9  Humidifier .............................. 10  Water drain ............................11  Water connection ..........................11  Adjustments related to water conductivity .....................
  • Page 3 Alarm log .............................. 36  Info I/O: Switching states and sensor values ..................37  TEST: Manual switching of the components ..................38  SET: Service parameters ........................39  Parameter list ............................41  Defrosting intervals (Storage) ......................45  Entering the serviceparameters, level III ................... 46  Entering level II as authorized user (owner) ..................

  • Page 4: Safety Information

    Important If these instructions are not observed, the product might be damaged or destroyed. Be aware that Gram Commercial has taken precautions to ensure that the safety of the product is in order. Please read carefully the following information regarding safety.

  • Page 5: Location

    Location When receiving the product, check the packaging material for damage. If any damage occurs at the packaging material, it should be considered if the product might have been damaged too. If the damage is substantial, please contact your dealer. The transport pallet can be removed by loosening the screws that fasten the pallet to the product.
  • Page 6 Because of the heavy weight of the product, the floor might be damaged or scratched when moving the product. Correct set up gives the most effective operation. The product should be located in a dry and adequately ventilated room. To ensure efficient operation, it may not be placed in direct sunlight or against heat-emitting surfaces.

  • Page 7: Placement Of Multiple Units Next To Each Other

      Placement of multiple units next to each other Depending upon the temperature and humidity at the installation location as well as the correct values being set, water contained in the surrounding air may condense on the surface of a refrigerator (condensation formation) due to the design. If multiple refrigerators or freezers are placed next to each other, then this condensation effect is stronger, plus a smaller amount of air would then circulate between the units.

  • Page 8: General Description

      General description Vapor system Compressor Front panel Condenser with air filter Display Gasket Air inlet Air distribution plate Door Supports Wall rail Foot pedal opener   765042113 Rev. 001...

  • Page 9: Electrical Connection

    If it is a product connected to an external compressor unit, it must be examined by the company who has connected the product to the unit. Outside the guarantee period, it is advisable to use the service advised by Gram Commercial, if possible. If this is not the case, assistance is required from a refrigeration company with knowledge of Gram’s products.

  • Page 10: Humidifier

    Repairing of electrical/technical parts may only be performed by a service electrician from Gram Commercial or an authorised refrigeration company with knowledge of Gram’s products. Do not use the product before all coverings are installed, so that live or rotating machine parts can not be touched.

  • Page 11: Water Drain

    Water drain Defrost water and water flushed from the humidifier are led away through a pipe on the rear of the cabinet. A water seal must be installed between cabinet and drain. Water connection To provide proper steam production, the humidifier must be connected to a water supply. To assure ideal steam production, it is important that the electrical conductivity of the inlet water is measured by the installer, to assure it is within standard range.

  • Page 12: Adjustments Related To Water Conductivity

    H01. In order to be allowed to adjust the H04 current to exceed 3,5 amp, there must be fitted an external SSR. This SSR has been the standard in the Gram production since the 2 October 2017. If this external SSR is fitted, the H03 parameter must be set to YES, in order to extend the amp range to a maximum of 7,5 amp.
  • Page 13     If the external SSR is not fitted, it is not allowed to change the parameter H03 from NO to YES, before the external SSR has been fitted, otherwise the controller will be damaged. If the external SSR is fitted on a cabinet build before the 2 of October 2017, it is of great importance, that the controller software is updated.

  • Page 14: General Use

    General use Do not block vent holes in the front panel. Do not damage the refrigeration system parts. During normal operation, some parts of the refrigeration system in the compressor compartment might reach high temperatures, and could therefore cause burns if touching these components. Do not use electrical devices inside the product.

  • Page 15: Commissioning, Functional Description

    Commissioning, functional description In order to ensure reliable processes for Freezing, Storage, Thawing, Proving and Holding the cabinet must be furnished with controls to regulate the air temperature, ventilation and relative humidity. The operating modes of Storage, Thawing, Proving and Holding can be connected up manually.

  • Page 16: Connection And Disconnection Of The Main Circuit Breaker

    Connection and disconnection of the main circuit breaker The unit is furnished with a two-pole main breaker, which is located behind the tiltable control panel. When it has been disconnected, the controls and all components that are accessible without opening the control panel are disconnected from the power supply. If the main breaker is connected, then the controls and the other components are connected to the power supply.

  • Page 17: User Interface To The Unit (Touchscreen)

    When the unit is connected with the lighting mains, and the main breaker switched on, then the standby display is shown on the screen: (fig. 1). The Gram logo and the unit type "GA 950" as well as the date and time are shown on a field with a blue background. Please check that the correct date and time are displayed.

  • Page 18: Selection Of Language

    In order to change the settings for the date, time, formats, units or menu language, you need to press the button on the keyboard (machine symbol) in the lower right corner of the screen (fig. 3). The factory setting for the language is English. When you press the button , the menu for settings for the unit opens (fig.

  • Page 19: Setting Of Clock (Time)

    Setting of clock (time) The clock is set by touching the field with the time under the text "Time" (fig. 7): Fig. 7 Fig. 8 Enter the desired time directly using the numerical keypad and confirm with the "OK" button (fig.

  • Page 20: Setting Of Date Format

    Setting of date format Set the date format by pressing the "DD/MM/YYYY" field (fig. 11). Fig. 11 Fig. 12 The choice between the sequence day/month/year and month/day/year is now shown (fig. 12): Select by pressing. Season: summer time/winter time Setting of the season, i.e. the setting of winter/summer time is done by pressing on the field under the text "Summer time"...

  • Page 21: Setting Of Ending Times For Programs For Each Weekday

    Fig. 15 Fig. 16 Here, you can choose to display temperatures in Celsius or Fahrenheit for all displays in the controls (fig. 16). When you have made all the changes to the settings, then return to the Settings menu (fig. 4) for the unit by pressing the "OK"...

  • Page 22: Preconfigured Programs

    Fig. 20 Fig. 20a Enter a time. In order to jump over a day, the symbol „---„ (fig. 20a) needs to be inserted on the desired day. With "OK", you save what you entered for this weekday, or you can return to the weekly overview (fig.

  • Page 23: Selection Of Ending Time For The Program

    Further touching of the Master symbol opens a window with an ending time for the program (ready at) on the following day. Selection of ending time for the program A menu is opened in which the ending time for the program is selected, and the default - setting of "Weekday"...

  • Page 24: Changing Of Established Date And Ending Time For The Program

    Changing of established date and ending time for the program To do this, press on the "Calendar" field (fig. 26) Fig. 26 Fig. 27 The calendar menu (fig. 27) will be displayed. Here, the date can be changed by touching the date fields. Selections for changing the time can be opened by touching the time window.

  • Page 25: Changing Of Further Settings Before Program Start

    Changing of further settings before program start In order to adjust a preconfigured program, touch the button on the keyboard with the Master symbol. The selected symbol is displayed with a blue edge, and the "Settings" button (symbol with sliding button) is shown in blue, which means that it has been activated (fig.
  • Page 26 you must choose selection, see the first section. For example, to disconnect holding you must make the same selection under With "OK" the values are accepted and the menu closed. The selection menu "Save recipe ?" is then shown (fig. 31) Saves the entered values temporarily and accordingly runs the execution of the program activated below only once.

  • Page 27: Display During Program Execution (Fig. 32)

    Display during program execution (fig. 32) The top line shows the phase of the program execution currently running depending upon the program  selected:  Freezing, Storage, Thawing, Proving, Holding  The field in the upper right  rectangle shows the  currently running program  phase and the associated  remaining (residual) time.  A red triangle is shown as  an alarm symbol in the  event of an alarm.  In the window in the middle, the  The green bar at the  symbol for the currently   bottom of the display  The current value for the  shows the total program  temperature or the relative  running program is shown at the  execution in proportion  humidity is shown in the  left, in the centre the ending time  to the duration.  lower right corner  for the program and at the right a  depending upon the  button to interrupt the program.  program phase.  765042113 Rev. 001...

  • Page 28: Changing A Running Program

    Changing a running program Fig. 33 Fig. 34 Touching the program symbol (fig. 33) opens the settings menu (fig. 34), where you can change the specifications for program phases that have not been run yet. Touching the field with the ending time for the program (fig. 35) opens the settings menus for date and time (fig.

  • Page 29: Interruption Of The Currently Running Program

    Interruption of the currently running program Touching the button causes the currently running program to be interrupted (fig. 36). Fig. 36 Fig. 37 A window opens where for verification purposes you are asked whether the program should really be halted (fig. 37). If ("YES") is selected, the program is stopped.
  • Page 30              Freezing     Storage     Thawing   Proving    Holding Fig. 39 Under these, there are fields containing the values for duration, temperature and relative humidity for the respective program phase. By touching the field for the respective program phase, for example, it is selected for the setting of its values. Then the fields, for example , are opened when touched.
  • Page 31 With "OK" the values are accepted and the menu closed. The selection menu "Save recipe ?" is then shown (fig. 41) Saves the entered values temporarily and runs in a corresponding manner the commenced program sequence 1 x. Means that the menu is exited without changes.
  • Page 32 Touching the program symbol (fig. 43) shows a selection of symbols for your own programs (fig. 44). Choose a symbol by touching it, and navigate back and forth between further symbols with "<" or ">". Change for example the picture from or exit the menu without changes with "<".

  • Page 33: Manual Programs

    Manual programs The display start page (fig. 48) will save up to four different symbols. You can activate each one of these program phases separately to for example use the unit as a storage freezer or solely as a proving machine. Fig.

  • Page 34: Alarms/Error Messages

    Alarms/error messages If an error arises, an error message window is displayed on the screen, for example a room sensor error, and an acoustic alarm is issued. In order to acknowledge this alarm, you must touch the alarm window (the area with the black background).

  • Page 35: Sensor Alarms

    Sensor alarms Code Error message Description System reaction Compressor runs for 5 min. Sensor defective, not Room sensor error ON and connected or short-circuited. 5 min. OFF. Defrosting will be 45 min., Sensor defective, not and the evaporator fan will Evaporator sensor error connected or short-circuited.

  • Page 36: Alarm Log

    Alarm log Alarms are stored in the alarm list. To open the alarm list, first push „Settings“ and then push "Alarm" During operation, the alarm list can be accessed by pressing the area of the alarm symbol on the right edge of the picture (marked red in the picture) The last 20 alarms are displayed.

  • Page 37: Info I/O: Switching States And Sensor Values

      Info I/O: Switching states and sensor values The current values of the sensors and the switching states of the controller outputs can be displayed in the menu „Info I/O“. To display the „Info I/O“ menu, first push the “Settings” button and then the “Info”...

  • Page 38: Test: Manual Switching Of The Components

      During operation, the Info window can be accessed by pressing the area of the temperature/humidity symbol on the right edge of the picture (marked red in the picture)   TEST: Manual switching of the components The outputs of the electronic controller can be switched manually for test purposes. When a button is touched, it appears blue, the output is switched on.

  • Page 39: Set: Service Parameters

      SET: Service parameters The parameters are listed in several pages of the "SET" menu.       765042113 Rev. 001...
  • Page 40   To display the list, first push the “Settings” button and then the “SET” button. Navigation between pages is done by touching the corresponding tabs at the bottom edge: C = Cooling C-H = Cooling/Heating E-F = Evaporator Fan D = Defrost rH = relative Humitity S = System parameter A = Alarm parameter...

  • Page 41: Parameter List

      Parameter list COOLING Dim. Note Item Minimum compressor on time serv Minimum compressor off time serv Compressor ON->OFF differential - Troom <= SP - C03 ==> 10,0 °K serv FREEZE, STORAGE, RETARD- compressor OFF Compressor OFF->ON differential - Troom >= SP + C04 ==> 10,0 °K serv...
  • Page 42   Item EVAPORATOR FAN Dim. Note Evaporator fan speed, compressor, heater serv and steamer OFF -FREEZE- Evaporator fan speed, compressor, heater serv and steamer OFF -STORAGE- Evaporator fan speed, compressor, heater serv and steamer OFF -THAW- Evaporator fan speed, compressor, heater serv and steamer OFF -PROVE- Evaporator fan speed, compressor, heater...
  • Page 43   Item STEAMER Dim. Note H01 Humidity control serv Humidity control serv Set temperature above which the boiler can -5,0 15,0 °C serv be activated Use external SSR serv 3.5 / Max allowed current in boiler (Imax2) serv Current in boiler to close the water inlet 3.5 / serv valve (Imax1)
  • Page 44   Item SYSTEM Dim. Note Plateau time -THAW- user Plateau time -PROVE- user Starting point acquisition time serv for slope calculation Frame heaters setpoint -30,0 30,0 -5,0 °C serv Frame heaters differential 10,0 °K serv opera No door switch; Normally Open; Door switch NONE, NO, NC Normally Closed...

  • Page 45: Defrosting Intervals (Storage)

      Item INPUT Dim. Note Adjusting room sensor input -5,0 °K serv Adjusting evaporator sensor input -5,0 °K serv Adjusting condenser 1 sensor input -5,0 °K serv Adjusting Humidity sensor input serv NETWORK Dim. Note Item IPaddr - 1 user IPaddr - 2 user IPaddr - 3...

  • Page 46: Entering The Serviceparameters, Level Iii

      Entering the serviceparameters, level III   The change of the service parameters requires the registration to level "III" as Gram Service. The input window is reached by pressing the "Service" button. Touching the input field opens a numerical keypad. The service password is "6500".

  • Page 47: Maintenance Of The Steam Humidifier System

      Maintenance of the steam humidifier system   The operating characteristics and maintenance intervals of the steam humidifier are mainly dependent on the exising water quality (total hardness, conductivity) and the amount of steam generated since the last maintenance. Different qualities can lengthen or shorten the period. The residues found in the steam cylinder provide an indication of future maintenance intervals.

  • Page 48: Cleaning The Steam Cylinder

      Cleaning the steam cylinder Disconnect the cabinet at the mains.  Empty the cylinder of water. Pull out the yellow plug of the drain hose. Bend the hose down behind the cabinet back, so that the water can be emptied into a bucket or drain. Place the plug in the hose and put the hose in place again.
  • Page 49   Remove all scale and sludge from cylinder When cleaning do not use acids or other chemicals. Remove deposit from the heating electrodes by knocking them (small amounts that remain are acceptable). Inspect the inside of the top part of the cylinder for furring and any electrical bridging (black grooves) between the electrodes and their bushings and remove completely by washing.
  • Page 50   Clean cylinder coarse strainer. Assembling the cylinder: If necessary, replace the o-ring seal between the top and bottom part. Connect upper and lower parts with clamps. Replace the o-ring seal in the bottom of the cylinder, if necessary. Refit cylinder firmly into the base. Connect plugs to the matching electrodes and level sensor.

  • Page 51: Replacing Electrodes

      Refit the cylinder cover. Refit the steam pipe. Switch on the unit and operate for 15 to 30 minutes. Check for any leaks. Replacing electrodes Disassemble the cylinder and open as described in chapter "Cleaning the steam cylinder". Loosen hand nuts and take out old electrodes. Insert new electrodes and fasten hand nuts –...

  • Page 52: Cleaning The Pump

      Reassemble the steam cylinder and fit as desribed in the chapter "Cleaning the steam cylinder". Connect plugs to the matching electrodes and level sensor. Connect hoses for water supply and drain. Brown Blue Black Black Grey Switch on the unit and operate for 15 to 30 minutes. Check for any leaks. Cleaning the pump Disassemble the cylinder and open as described in chapter "Cleaning the steam cylinder".
  • Page 53   Open pump (bajonet joint). Remove residues from discharge hoses and pump. Replace o-ring as necessary. Reassemble the pump. Mount the pump at the base plate. Connect the hoses to the pump. Connect electrical cable to pump. Reassemble the steam cylinder and fit as desribed in the chapter "Cleaning the steam cylinder". Switch on the unit and operate for 15 to 30 minutes.
  • Page 54   Remove the water supply hose by loosening the hose clip. Dismount the solenoid valve from the bracket.   Disassemble the solenoid valve, and remove filter and reducer. Clean the parts. If necessary, replace the rubber seal. Assemble the solenoid valve with filter and reducer again. Mount the valve at the bracket and put on the connectors.
  • Page 55   Mount the steam pipe and the cover again as descibed in: "Cleaning the steam cylinder". Connect the water supply again, and check for leaks.     765042113 Rev. 001...

  • Page 56: Wiring Diagram

    Wiring diagram 765042113 Rev. 001...

  • Page 57: Piping Diagram

    Piping diagram     765042113 Rev. 001...

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Baker ga 950

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