TECHNICAL NOTICE GH/GHO/GAE V

TECHNICAL NOTICE GH/GHO/GAE V1.0-02.14 INDUSTRIAL COOLING UNITS

Identification Marksa SA Industrial cooling 39, avenue du Technicum CH-2400 Le Locle Version Date Modifications 1.0 14.02.14 First edition Tel.: +41 32 933 55 55 Fax: +41 32 931 15 65 Translated from original French instructions. Correspondence All correspondence regarding our products must provide the serial number. This can be found on the identification plate attached to the cooler unit. GH ART: Copyright The reproduction, even partially, of this document is forbidden. No part may be copied in any form, and it may not be used, edited nor transmitted by any electronic means (photocopy, photography, magnetic supports or other recording processes), without the written authorisation of Marksa SA. All rights and particularly reproduction, translation, edition, distribution and also industrial property and recording are reserved. Page 2 / 126 Technical Notice GH/GHO/GAE V1.0 / 02.14

Table of contents 1 Introduction... 9 1.1 Preface... 9 1.2 Typographical conventions... 10 1.2.1 Description... 10 1.2.2 Command... 10 1.2.3 Procedure... 10 1.2.4 Cross-reference... 10 1.2.5 List of items... 10 1.2.6 Troubleshooting... 11 1.2.7 Warnings... 11 1.2.8 Recommendation and note... 12 2 Generalities...13 2.1 Appropriate use... 13 2.2 Safety and precautions for use... 13 2.2.1 Importance of safety instructions... 13 2.2.2 Safety... 13 2.2.3 Graphic symbols... 14 2.3 Operating principle... 15 2.3.1 GH schematic diagram... 15 2.3.2 GHO schematic diagram... 16 2.3.3 GAE schematic diagram... 17 2.4 Available models and options... 18 2.4.1 List of models... 18 2.4.2 Available options... 18 3 GH 80 model... 19 3.1 Description... 19 3.1.1 General view... 19 3.1.2 Technical specifications...20 3.2 Handling... 22 3.3 Installation... 22 3.3.1 Hydraulic connections...22 3.3.2 Electrical connections... 22 3.3.3 Filling the tank... 23 3.4 Commissioning... 24 3.5 Specific settings... 24 3.5.1 Draining the tank... 24 3.5.2 Bleeding the primary circuit (chilled water)... 24 Technical Notice GH/GHO/GAE V1.0 / 02.14 Page 3 / 126

Table of contents 4 GH 100 model...25 4.1 Description... 25 4.1.1 General view... 25 4.1.2 Technical specifications... 26 4.2 Handling... 28 4.3 Installation... 28 4.3.1 Hydraulic connections...28 4.3.2 Electrical connections... 28 4.3.3 Filling the tank... 29 4.4 Commissioning... 30 4.5 Specific settings... 30 4.5.1 Draining the tank... 30 4.5.2 Bleeding the primary circuit (chilled water)... 30 5 GH 200/300 models...31 5.1 Description... 31 5.1.1 Front view... 31 5.1.2 Rear view... 32 5.1.3 Technical specifications... 33 5.2 Handling... 35 5.3 Installation... 35 5.3.1 Hydraulic connections...35 5.3.2 Electrical connections... 35 5.3.3 Filling the tank... 35 5.4 Commissioning... 36 5.5 Specific settings... 36 5.5.1 Draining the tank... 36 5.5.2 Bleeding the primary circuit (chilled water)... 36 6 GH 400/600/800 models...37 6.1 Description... 37 6.1.1 Front view... 37 6.1.2 Rear view... 38 6.1.3 Technical specifications... 39 6.2 Handling... 41 6.3 Installation... 41 6.3.1 Hydraulic connections...41 6.3.2 Electrical connections... 41 6.3.3 Filling the tank... 41 6.4 Commissioning... 42 6.5 Specific settings... 42 6.5.1 Draining the tank... 42 6.5.2 Bleeding the primary circuit (chilled water)... 42 Page 4 / 126 Technical Notice GH/GHO/GAE V1.0 / 02.14

Table of contents 7 GHO 300 and GHO 500 models... 43 7.1 Description... 43 7.1.1 Front view... 43 7.1.2 Technical specifications...44 7.2 Handling... 45 7.3 Installation... 45 7.3.1 Hydraulic connections...45 7.3.2 Electrical connections... 45 7.4 Commissioning... 46 7.5 Specific settings... 46 7.5.1 Bleeding the primary circuit (chilled water)... 46 8 GHO 600/800 models... 47 8.1 Description... 47 8.1.1 Front view... 47 8.1.2 Rear view... 48 8.1.3 Technical specifications...49 8.2 Handling... 51 8.3 Installation... 51 8.3.1 Hydraulic connections...51 8.3.2 Electrical connections... 51 8.4 Commissioning... 52 8.5 Specific settings... 52 8.5.1 Bleeding the primary circuit (chilled water)... 52 9 GHO 510/810/1010 models... 53 9.1 Description... 53 9.1.1 Front view... 53 9.1.2 Rear view... 54 9.1.3 Technical specifications...55 9.2 Handling... 57 9.3 Installation... 57 9.3.1 Hydraulic connections...57 9.3.2 Electrical connections... 57 9.4 Commissioning... 58 9.5 Specific settings... 58 9.5.1 Bleeding the primary circuit (chilled water)... 58 Technical Notice GH/GHO/GAE V1.0 / 02.14 Page 5 / 126

Table of contents 10 GH 1000 to 1800/2000/2400 models...59 10.1 Description... 59 10.1.1 Front view... 59 10.1.2 Rear view... 60 10.1.3 Technical specifications... 61 10.2 Handling... 63 10.3 Installation... 63 10.3.1 Hydraulic connections... 63 10.3.2 Electrical connections... 63 10.3.3 Filling the tank... 63 10.4 Commissioning... 64 10.5 Specific settings... 64 10.5.1 Draining the tank... 64 10.5.2 Bleeding the primary circuit (chilled water)... 64 11 GH 3000/3500/4700 models...65 11.1 Description... 65 11.1.1 Front view... 65 11.1.2 Rear view... 66 11.1.3 Technical specifications... 67 11.2 Handling... 69 11.3 Installation... 69 11.3.1 Hydraulic connections... 69 11.3.2 Electrical connections... 69 11.3.3 Filling the tank... 69 11.4 Commissioning... 70 11.5 Specific settings... 70 11.5.1 Draining the tank... 70 11.5.2 Bleeding the primary circuit (chilled water)... 70 12 GH Double models...71 12.1 Description... 71 12.1.1 Front view... 71 12.1.2 Rear view... 72 12.1.3 Technical specifications... 73 12.2 Handling... 74 12.3 Installation... 74 12.3.1 Hydraulic connections... 74 12.3.2 Electrical connections... 74 12.3.3 Filling the tank... 75 12.4 Commissioning... 76 12.5 Specific settings... 76 12.5.1 Draining the tank... 76 12.5.2 Bleeding the primary circuit (chilled water)... 76 Page 6 / 126 Technical Notice GH/GHO/GAE V1.0 / 02.14

Table of contents 13 GAE models... 77 13.1 Description... 77 13.1.1 Front view... 77 13.1.2 Rear view... 78 13.1.3 Technical specifications... 79 13.2 Handling... 81 13.3 Installation... 81 13.3.1 Hydraulic connections... 81 13.3.2 Electrical connections... 81 13.4 Commissioning... 82 13.5 Specific settings... 82 13.5.1 Bleeding the primary circuit (chilled water)... 82 14 Settings and maintenance... 83 14.1 Settings... 83 14.1.1 Thermostat... 83 14.1.2 Bleeding the installation - BELIMO valves... 85 14.2 Maintenance... 86 14.2.1 Periodic maintenance... 86 14.2.2 Safety... 86 14.2.3 Maintenance table... 86 14.2.4 Weekly maintenance...86 14.2.5 Monthly maintenance...86 14.2.6 Annual maintenance... 87 15 Options... 89 15.1 List of options... 89 15.1.1 Cleanable heat exchanger (B)... 90 15.1.2 Manifold (D)... 91 15.1.3 400 V power supply (E)...91 15.1.4 Flow rate controller (F)... 92 15.1.5 Progressive adjustment (U)... 92 15.1.6 Pre-heating kit (H)... 98 15.1.7 Insulation of the tank (I)... 99 15.1.8 By-pass (J)... 100 15.1.9 Differential thermostat (L)... 101 15.1.10 Frame on wheels (M)... 101 15.1.11 Level detector (N)... 102 15.1.12 Pressurised water circuit (P)... 103 15.1.13 High power pump (R)... 104 15.1.14 Timer (T)... 104 15.1.15 Pressure gauge (V)... 104 15.1.16 Programmable troubleshooting logic controller (Y)... 105 15.1.17 TA valve (X)... 115 16 Troubleshooting... 117 16.1 Warnings... 117 16.2 Faults... 118 16.2.1 The unit is not operating... 119 16.2.2 High temperature alarm... 120 Technical Notice GH/GHO/GAE V1.0 / 02.14 Page 7 / 126

Table of contents 17 Appendix...121 17.1 Compliance... 121 17.1.1 Directives... 121 17.1.2 Identification plate... 121 17.2 Discarding the product... 122 17.2.1 General remarks... 122 17.2.2 Preparation... 122 17.3 Maintenance sheet... 123 17.4 Certificate of conformance... 124 17.5 Technical file... 126 Page 8 / 126 Technical Notice GH/GHO/GAE V1.0 / 02.14

Introduction 1 Contents of the chapter This chapter contains basic information on the structure of the document, its specifications and the documentation. 1.1 Preface This manual is intended for all users of a Marksa cooler unit. This manual is intended for all users of a Marksa cooler unit. It contains all the information necessary for installation, commissioning, periodic maintenance and repair. This manual was compiled by Marksa SA with the same care as your cooler unit and is therefore an inseparable component. If you have any questions or do not completely understand any point, please contact your retailer immediately or contact us directly. Technical Notice GH/GHO/GAE V1.0 / 02.14 Page 9 / 126

1 Introduction 1.2 Typographical conventions The following styles are used in this manual: 1.2.1 Description This style, used in conjunction with illustration numbers, is preceded by the corresponding numbers: Example (1) First item (2) Second item (3) Etc. 1.2.2 Command Any software command, button, function key, window, icon, option, tab, checkbox, selection box, article, menu, tool bar, field and section used in this document is represented by a bold italic font. Example The On button is used to start the unit. 1.2.3 Procedure Each step of the procedure to be performed by the user is preceded by a letter. Example A. Remove the protective plate. B. Replace the faulty component. C. Refit the protective plate. 1.2.3.1 Result of the procedure The result of the procedure is shown by the following symbol. Example A. Put the main switch to OFF. The electricity supply to the unit is switched off. 1.2.4 Cross-reference This style is used to help the user find additional information about the current subject. Example See section 1.2.4 Cross-reference on page 10. 1.2.5 List of items This style is used to display a list of components. Example item 1; item 2; item 3. Page 10 / 126 Technical Notice GH/GHO/GAE V1.0 / 02.14

Introduction 1 1.2.6 Troubleshooting The complete description and error message, explanation and solution are shown as follows: Problem - Explanation, possible cause Remedy 1.2.7 Warnings Five warning styles are defined, based on the importance of the warning and the risks it represents. 'Danger', 'Warning' and 'Caution' alerts are defined in accordance with requirements contained in the following standards: ANSI Z535.4; ISO 3864, ISO 3864-1:2002 and ISO 3864-2:2004. 1.2.7.1 Danger This term designates an imminently dangerous situation that, if not avoided, will result in death or serious injury. The main risk is shown in capital letters below the DANGER symbol. However, the presence of additional secondary risks is not excluded. Example ELECTROCUTION Never touch an uninsulated electrical wire. Any contact with an electrical wire is likely to lead to electrocution. 1.2.7.2 Warning Used to designate a potentially dangerous situation that, if not avoided, may result in death or serious injury. Example Always disconnect the power supply cable before opening the appliance. Any contact with an electrical wire is likely to result in electrocution. Technical Notice GH/GHO/GAE V1.0 / 02.14 Page 11 / 126

1 Introduction 1.2.7.3 Caution Used to designate a potentially dangerous situation that, if not avoided, may result in mild injury or cause damage to equipment. Example Do not handle a broken mirror with bare hands, due to the risk of cuts. Use of the CAUTION sign without the alert triangle means that the only risk is of damage to equipment. Example The unit must be transported flat and must not sustain shocks. 1.2.8 Recommendation and note When additional information is needed and failure to follow it causes only minor risks, a recommendation or note may be added. 1.2.8.1 Recommendation If a failure to follow information only results in minor risks and additional information proves necessary, comments are provided in the form of recommendations and notes. The recommendation is used to indicate a preferable procedure or recommended practice. Marksa SA declines any liability if recommendations are not followed. Example It is recommended that the tank be filled above the visual indicator light. 1.2.8.2 Note Used to accompany a general remark or purely informative comment. Example The unit has been checked, adjusted and tested in our workshops. Page 12 / 126 Technical Notice GH/GHO/GAE V1.0 / 02.14

Generalities 2 Contents of the chapter This chapter contains general information applicable to all models of cooler units. In particular, it includes instructions relating to safety as well as practical and theoretical information. 2.1 Appropriate use The cooler unit is designed to maintain the ambient temperature of a machine tool. It may only be used by suitably trained and qualified staff. The instructions contained in this user manual must be followed, particularly in relation to safety. 2.2 Safety and precautions for use 2.2.1 Importance of safety instructions The safety and protection instructions given in this manual must be followed to avoid injuries, damage to equipment or environmental pollution. Similarly, legal provisions, measures to prevent accidents and protect the environment, as well as technical regulations intended to ensure safe suitable working conditions applicable in the country and on the site where the cooler unit is used, must be followed. Using the cooler unit in any way other than as described in this manual may invalidate the guarantee. 2.2.2 Safety Leave clearance of at least 0.5 m around the unit. Cooling is achieved by circulating water; nonetheless, sufficient space must be provided to each side and above the cooler unit. The minimum permitted ambient temperature is 5 C. Below this limit, operation of your cooler unit may be adversely affected. Technical Notice GH/GHO/GAE V1.0 / 02.14 Page 13 / 126

2 Generalities 2.2.3 Graphic symbols The following symbols may be found on the cooler unit: Symbol Description Electrical risks (electrocution) Unit cooling liquid outlet Unit cooling liquid return Power up (1) Power down (0) Table 2-1: Symbols Page 14 / 126 Technical Notice GH/GHO/GAE V1.0 / 02.14

Generalities 2 2.3 Operating principle The range of GH and GHO (oil/water) heat exchanger cooler units supplies chilled water (18) continuously at constant temperature. The GAE range (water/air) supplies chilled air for electrical cabinets. Cooling is provided by a central primary circuit (15) at a maximum temperature of 15 C passing through a plate heat exchanger (14). It is controlled by a solenoid valve or a progressive valve (10). It is possible to open progressive valves on the water inlet from the system manually and temporarily, to flush the installation by circulating water through the heat exchanger at maximum flow rate. 2.3.1 GH schematic diagram (1) (2) (3) (4) (5) (6) (7) (8) (2) J (18) (17) (16) (15) (14) (13) (12) (11) (10) (9) Fig. 2-1 : GH schematic diagram - Direct cooling of the tank (1) Customer (2) Temperature sensor (3) Pressure gauge (option) (4) Bypass valve (option) (5) Electrical level sensor (6) Pump (7) Oil thermostat (option, depending on model) (8) Thermostat (9) Inlet filter (10) Solenoid valve or progressive valve (EVS) (11) TA valve (option) (12) Heating (option) (13) Tank (14) Heat exchanger (15) Central primary circuit (16) Flow rate controller (option) (17) Temperate water inlet (18) Chilled water outlet Technical Notice GH/GHO/GAE V1.0 / 02.14 Page 15 / 126

2 Generalities 2.3.2 GHO schematic diagram The GHO cooler range is designed specifically for cooling oils. (1) (2) (3) (4) (5) (6) (10) (9) (8) (7) Fig. 2-2 : GHO schematic diagram - Interior (1) Customer (2) Chilled oil outlet (3) Pressure gauge (option) (4) Thermostat (5) Solenoid valve or progressive valve (EVS) (6) Inlet filter (7) Heat exchanger (8) Temperature sensor (9) Temperate oil inlet (10) Pump Page 16 / 126 Technical Notice GH/GHO/GAE V1.0 / 02.14

Generalities 2 2.3.3 GAE schematic diagram The GAE cooler range is designed specifically for cooling electrical cabinets. (1) (2) (3) (4) (5) (8) (7) (6) Fig. 2-3 : GAE schematic diagram - Direct cooling of the tank (1) Cabinet (2) Temperature sensor (3) Thermostat (4) Solenoid valve or progressive valve (EVS) (5) Chilled water inlet (Legris 14 mm connector) (6) Temperate water outlet (Legris 14 mm connector) (7) Heat exchanger (8) Fan Technical Notice GH/GHO/GAE V1.0 / 02.14 Page 17 / 126

2 Generalities 2.4 Available models and options The range of GH/GHO/GAE and GH Double industrial water coolers is available in several models, based on their power and options available. 2.4.1 List of models The following models are currently available: Model Power Model Power Model Power GH 80 0.8 kw GHO 300 3 kw GAE 1.5 KW GH 100 1 kw GHO 500 5 kw GH 200 2 kw GHO 600 6 kw GH 300 3 kw GHO 800 8 kw GH 400 4 kw GHO 510 5 kw GH 600 6 kw GHO 810 8 kw GH 800 8 kw GHO 1010 10 kw GH 1000 10 kw GH 200 + 200 2 + 2 kw GH 1600 18 kw GH 200 + 300 2 + 3 kw - - GH 1800 18 kw GH 400 + 100 4 + 1 kw - - GH 2000 20 kw GH 400 + 200 4 + 2 kw - - GH 2400 24 kw GH 400 + 300 4 + 3 kw - - GH 3000 30 kw - - GH 3500 35 kw - - - GH 4700 47 kw - - - - Table 2-2: List of models 2.4.2 Available options Various options are available. See section 15.1 List of options on page 89. Options are indicated in the name of the unit, following its type. Example GH 100 NR Where: N: Level detector R: High power pump Page 18 / 126 Technical Notice GH/GHO/GAE V1.0 / 02.14

GH 80 model 3 Contents of the chapter This chapter contains information specific to the GH 80 model. It covers all aspects associated with installation, commissioning, adjustment and maintenance for this model. 3.1 Description 3.1.1 General view (1) (2) (3) (4) Fig. 3-1 : GH 80 cooler (1) Lifting ring (not visible) (2) Thermostat display (3) Main switch (4) Fault indicator light (red) Technical Notice GH/GHO/GAE V1.0 / 02.14 Page 19 / 126

3 GH 80 model 3.1.2 Technical specifications 3.1.2.1 Standard nominal conditions Description Unit GH 80 Cooling power kw 0.8 Power input kw 0.4 Inlet temperature C 22 Outlet temperature C 20.8 Max central circuit temperature Central circuit minimum flow rate C 15 L/min 10 Diameter of mains supply connection G ½"F Internal pressure drops kpa 30 3.1.2.2 Electrical data Description Unit GH 80 Nominal power kw 0.4 Maximum current A 3.5 Starting current A 15 Power supply Vx phxhz 230x1x50 3.1.2.3 Hydraulic circuit Description Unit GH 80 Flow rate L/min 10 Total pressure bar 2.5 Tank capacity L 8 Connection diameter G ½"F Page 20 / 126 Technical Notice GH/GHO/GAE V1.0 / 02.14

GH 80 model 3 3.1.2.4 Dimensions Description Unit GH 80 Width mm 304 Height mm 394 Depth mm 643 Weight kg 32 3.1.2.5 Other characteristics Description Unit GH 80 Standard colour - RAL 7035 Noise rating ISO 3741 Lp db(a) 39 Technical Notice GH/GHO/GAE V1.0 / 02.14 Page 21 / 126

3 GH 80 model 3.2 Handling The unit must be transported flat and must not sustain shocks. 3.3 Installation The unit is normally installed close to the machine, as shown on its installation drawings. During installation, allow for clearance of about 0.5 m around the cooler unit. 3.3.1 Hydraulic connections Unless otherwise specified, connections between the cooling unit and the machine may be made using pipes of cross-section at least equal to the diameter indicated in the technical specifications. See section 3.1.2 Technical specifications on page 20. 3.3.2 Electrical connections ELECTROCUTION The machine cabinet must be disconnected from power while connecting cables. Power cable fitted is 3 m in length (or as specified by the customer). Page 22 / 126 Technical Notice GH/GHO/GAE V1.0 / 02.14

GH 80 model 3 3.3.3 Filling the tank The liquids used are not suitable for human consumption. A. Prepare a mixture of water and 30% ethylene glycol. (1) Do not use antifreeze for motor vehicles. Marksa recommends ANTIFROGEN N antifreeze. B. Unscrew the cap (1). C. Fill the tank up to the maximum level indicated (2). D. Refit the cap. (2) Fig. 3-2 : Filler cap A certain quantity of fluid is used to fill the machine circuit. Monitor the level when starting the machine and top up as necessary. Technical Notice GH/GHO/GAE V1.0 / 02.14 Page 23 / 126

3 GH 80 model 3.4 Commissioning The unit has been checked, adjusted and tested in our workshops. A. Make the hydraulic and electrical connections. B. Fill the tank with liquid. C. Start the unit (1). D. Check the direction of rotation of the pump. E. Adjust the settings below. (1) Fig. 3-3 : Starting up 3.5 Specific settings 3.5.1 Draining the tank A. Disconnect the outlet pipe (1). B. Plunge the outlet pipe into an empty container. C. Press the push-button on the front panel of the unit. D. Release the button when the pump sucks in air. (1) 3.5.2 Bleeding the primary circuit (chilled water) Some appliances are fitted with automatic bleed systems. For others, the cooler is lower than the system and bleeding occurs naturally. Fig. 3-4 : Filler cap Nonetheless, on appliances fitted with progressive valves (generally made by BELIMO (orange motor)), we recommend opening the valve manually to circulate water through the heat exchanger at maximum flow rate for a few seconds. See section 14.1.2 Bleeding the installation - BELIMO valves on page 85 Page 24 / 126 Technical Notice GH/GHO/GAE V1.0 / 02.14

GH 100 model 4 Contents of the chapter This chapter contains information specific to the GH 100 model. It covers all aspects associated with installation, commissioning, adjustment and maintenance for this model. 4.1 Description 4.1.1 General view (1) (2) (7) (3) (6) (4) (5) Fig. 4-1 : GH 100 cooler (1) Lifting ring (not visible) (2) Fault indicator light (red) (3) Water level indicator light (orange) (option) (4) Thermostat display (5) Wheels (option) (6) Main switch (7) Drain button Technical Notice GH/GHO/GAE V1.0 / 02.14 Page 25 / 126

4 GH 100 model 4.1.2 Technical specifications 4.1.2.1 Standard nominal conditions Description Unit GH 100 Cooling power kw 1 Power input kw 0.4 Inlet temperature C 22 Outlet temperature C 20.5 Max central circuit temperature Central circuit minimum flow rate C 15 L/min 10 Diameter of mains supply connection G ½"F Internal pressure drops kpa 40 4.1.2.2 Electrical data Description Unit GH 100 Nominal power kw 0.4 Maximum current A 3.5 Starting current A 15 Power supply Vx phxhz 230x1x50 4.1.2.3 Hydraulic circuit Description Unit GH 100 Flow rate L/min 10 Total pressure bar 2.5 Tank capacity L 8 Connection diameter G ½"F Page 26 / 126 Technical Notice GH/GHO/GAE V1.0 / 02.14

GH 100 model 4 4.1.2.4 Dimensions Description Unit GH 100 Width mm 374 Height mm 442 Depth mm 694 Weight kg 45 4.1.2.5 Other characteristics Description Unit GH 100 Standard colour - STAINLESS STEEL Noise rating ISO 3741 Lp db(a) 39 Technical Notice GH/GHO/GAE V1.0 / 02.14 Page 27 / 126

4 GH 100 model 4.2 Handling The unit must be transported flat and must not sustain shocks. 4.3 Installation The unit is normally installed close to the machine, as shown on its installation drawings. During installation, allow for clearance of about 0.5 m around the cooler unit. 4.3.1 Hydraulic connections Unless otherwise specified, connections between the cooling unit and the machine may be made using pipes of cross-section at least equal to the diameter indicated in the technical specifications. See section 4.1.2 Technical specifications on page 26. 4.3.2 Electrical connections ELECTROCUTION The machine cabinet must be disconnected from power while connecting cables. Power cable fitted is 3 m in length (or as specified by the customer). Page 28 / 126 Technical Notice GH/GHO/GAE V1.0 / 02.14

GH 100 model 4 4.3.3 Filling the tank The liquids used are not suitable for human consumption. A. Prepare a mixture of water and 30% ethylene glycol. Do not use antifreeze for motor vehicles. Marksa recommends ANTIFROGEN N antifreeze. (1) B. Unscrew the cap (1). C. Fill the tank up to the maximum level indicated (2). D. Refit the cap. A certain quantity of fluid is used to fill the machine circuit. Monitor the level when starting the machine and top up as necessary. (2) Fig. 4-2 : Filler cap Technical Notice GH/GHO/GAE V1.0 / 02.14 Page 29 / 126

4 GH 100 model 4.4 Commissioning The unit has been checked, adjusted and tested in our workshops. A. Make the hydraulic and electrical connections. B. Fill the tank with liquid. C. Start the unit (2). D. Check the direction of rotation of the pump. E. Adjust the settings below. (1) (2) Fig. 4-3 : Starting up 4.5 Specific settings 4.5.1 Draining the tank A. Disconnect the outlet pipe (3). B. Plunge the outlet pipe into an empty container. C. Press the push-button (1) on the front panel of the unit. D. Release the button (1) when the pump sucks in air. (3) 4.5.2 Bleeding the primary circuit (chilled water) Some appliances are fitted with automatic bleed systems. For others, the cooler is lower than the system and bleeding occurs naturally. Fig. 4-4 : Draining the tank Nonetheless, on appliances fitted with progressive valves (generally made by BELIMO (orange motor)), we recommend opening the valve manually to circulate water through the heat exchanger at maximum flow rate for a few seconds. See section 14.1.2 Bleeding the installation - BELIMO valves on page 85 Page 30 / 126 Technical Notice GH/GHO/GAE V1.0 / 02.14

GH 200/300 models 5 Contents of the chapter This chapter contains information specific to the GH 200 and GH 300 models. It covers all aspects associated with installation, commissioning, adjustment and maintenance for these models. For purposes of clarity, only the GH 300 model is described in this chapter. However, the same explanations apply to the GH 200 model. 5.1 Description 5.1.1 Front view (1) (2) (6) (3) (5) (4) Fig. 5-1 : GH 300 cooler (front view) (1) Programmable logic controller display (option) (2) Thermostat display (3) Fault indicator light (red) (4) Filler plug (5) Water level sight glass (6) Main switch Technical Notice GH/GHO/GAE V1.0 / 02.14 Page 31 / 126

5 GH 200/300 models 5.1.2 Rear view (7) (8) (12) (9) (11) (10) Fig. 5-2 : GH 300 cooler (rear view) (7) Filter (8) Central primary circuit inlet (9) Central primary circuit outlet (10) Connectors for electricity supply (11) Cooling liquid return (12) Cooling liquid outlet Page 32 / 126 Technical Notice GH/GHO/GAE V1.0 / 02.14

GH 200/300 models 5 5.1.3 Technical specifications 5.1.3.1 Standard nominal conditions Description Unit GH 200 GH 300 Cooling power kw 2 3 Power input kw 0.4 0.4 Inlet temperature C 22 22 Outlet temperature C 19 19 Max central circuit temperature Central circuit minimum flow rate Diameter of mains supply connection C 15 15 L/min 7.5 10 G ½"F ½"F Internal pressure drops kpa 50 50 5.1.3.2 Electrical data Description Unit GH 200 GH 300 Nominal power kw 0.75 0.75 Maximum current A 3 3 Starting current A 15 15 Power supply Vx phxhz 400x3x50 400x3x50 5.1.3.3 Hydraulic circuit Description Unit GH 200 GH 300 Flow rate L/min 10 10 Total pressure bar 2.5 2.5 Tank capacity L 21 21 Connection diameter G ¾"F ¾"F Technical Notice GH/GHO/GAE V1.0 / 02.14 Page 33 / 126

5 GH 200/300 models 5.1.3.4 Dimensions Description Unit GH 200 GH 300 Width mm 470 470 Height mm 600 600 Depth mm 790 790 Weight kg 60 60 5.1.3.5 Other characteristics Description Unit GH 200 GH 300 Standard colour - RAL 7035 RAL 7035 Noise rating ISO 3741 Lp db(a) 40 40 Page 34 / 126 Technical Notice GH/GHO/GAE V1.0 / 02.14

GH 200/300 models 5 5.2 Handling The unit must be transported flat and must not sustain shocks. 5.3 Installation The unit is normally installed close to the machine, as shown on its installation drawings. During installation, allow for clearance of about 0.5 m around the cooler unit. 5.3.1 Hydraulic connections Unless otherwise specified, connections between the cooling unit and the machine may be made using pipes of cross-section at least equal to the diameter indicated in the technical specifications. See section 5.1.3 Technical specifications on page 33. 5.3.2 Electrical connections ELECTROCUTION The machine cabinet must be disconnected from power while connecting cables. Power cable fitted is 3 m in length (or as specified by the customer). 5.3.3 Filling the tank The liquids used are not suitable for human consumption. (1) A. Prepare a mixture of water and 30% ethylene glycol. Do not use antifreeze for motor vehicles. Marksa recommends ANTIFROGEN N antifreeze. B. Unscrew the cap (2). C. Fill the tank up to the maximum level indicated (3). D. Refit the cap. (2) (3) A certain quantity of fluid is used to fill the machine circuit. Monitor the level when starting the machine and top up as necessary. (4) Fig. 5-3 : Filler cap Technical Notice GH/GHO/GAE V1.0 / 02.14 Page 35 / 126

5 GH 200/300 models 5.4 Commissioning The unit has been checked, adjusted and tested in our workshops. (1) A. Make the hydraulic and electrical connections. B. Fill the tank with liquid. C. Start the unit (1). D. Check the direction of rotation of the pump. E. Adjust the settings below. 5.5 Specific settings 5.5.1 Draining the tank A. Place a container under the drain plug located below the cooler (4). B. Open the drain valve. C. Close the drain valve once the tank is empty. 5.5.2 Bleeding the primary circuit (chilled water) (2) (3) (4) Fig. 5-4 : Starting and draining Some appliances are fitted with automatic bleed systems. For others, the cooler is lower than the system and bleeding occurs naturally. Nonetheless, on appliances fitted with progressive valves (generally made by BELIMO (orange motor)), we recommend opening the valve manually to circulate water through the heat exchanger at maximum flow rate for a few seconds. See section 14.1.2 Bleeding the installation - BELIMO valves on page 85 Page 36 / 126 Technical Notice GH/GHO/GAE V1.0 / 02.14

GH 400/600/800 models 6 Contents of the chapter This chapter contains information specific to the GH 400, GH 600 and GH 800 models. It covers all aspects associated with installation, commissioning, adjustment and maintenance for these models. For purposes of clarity, only the GH 400 model is described in this chapter. However, the same explanations apply to the GH 600 and GH 800 models. 6.1 Description 6.1.1 Front view (1) (2) (3) (4) (5) (6) (7) (8) Fig. 6-1 : GH 400 cooler (front view) (1) Thermostat display (2) Fault indicator light (red) (3) Main switch (4) Programmable logic controller display (option, visible after opening the cover panel) (5) Pressure gauge for outlet circuit (6) Filler plug (7) Water level sight glass (8) Drain plug Technical Notice GH/GHO/GAE V1.0 / 02.14 Page 37 / 126

6 GH 400/600/800 models 6.1.2 Rear view (9) (10) (11) (12) (13) (14) Fig. 6-2 : GH 400 cooler (rear view) (9) Central primary circuit outlet (10) Central primary circuit inlet (11) Filter (12) Cooling liquid return (13) Connectors for electricity supply (14) Cooling liquid outlet Page 38 / 126 Technical Notice GH/GHO/GAE V1.0 / 02.14

GH 400/600/800 models 6 6.1.3 Technical specifications 6.1.3.1 Standard nominal conditions Description Unit GH 400 GH 600/800 Cooling power kw 4 8 Power input kw 0.75 0.75 Inlet temperature C 22 22 Outlet temperature C 18.5 17.4 Max central circuit temperature Central circuit minimum flow rate Diameter of mains supply connection C 15 15 L/min 17 25 G ¾"F ¾"F Internal pressure drops kpa 50 50 6.1.3.2 Electrical data Description Unit GH 400 GH 600/800 Nominal power kw 0.75 0.75 Maximum current A 3 3 Starting current A 15 15 Power supply Vx phxhz 400x3x50 400x3x50 6.1.3.3 Hydraulic circuit Description Unit GH 400 GH 600/800 Flow rate L/min 15 20 Total pressure bar 2.5 2.5 Tank capacity L 55 55 Connection diameter G ¾"F ¾"F Technical Notice GH/GHO/GAE V1.0 / 02.14 Page 39 / 126

6 GH 400/600/800 models 6.1.3.4 Dimensions Description Unit GH 400 GH 600/800 Width mm 500 500 Height mm 995 995 Depth mm 725 725 Weight kg 75 80 6.1.3.5 Other characteristics Description Unit GH 400 GH 600/800 Standard colour - RAL 7035 RAL 7035 Noise rating ISO 3741 Lp db(a) 40 40 Page 40 / 126 Technical Notice GH/GHO/GAE V1.0 / 02.14

GH 400/600/800 models 6 6.2 Handling The unit must be transported flat and must not sustain shocks. 6.3 Installation The unit is normally installed close to the machine, as shown on its installation drawings. During installation, allow for clearance of about 0.5 m around the cooler unit. 6.3.1 Hydraulic connections Unless otherwise specified, connections between the cooling unit and the machine may be made using pipes of cross-section at least equal to the diameter indicated in the technical specifications. See section 6.1.3 Technical specifications on page 39. 6.3.2 Electrical connections ELECTROCUTION The machine cabinet must be disconnected from power while connecting cables. Power cable fitted is 3 m in length (or as specified by the customer). 6.3.3 Filling the tank The liquids used are not suitable for human consumption. A. Prepare a mixture of water and 30% ethylene glycol. (1) Do not use antifreeze for motor vehicles. Marksa recommends ANTIFROGEN N antifreeze. B. Unscrew the cap (1). C. Fill the tank up to the maximum level indicated (2). D. Refit the cap. (2) A certain quantity of fluid is used to fill the machine circuit. Monitor the level when starting the machine and top up as necessary. Fig. 6-3 : Filler cap Technical Notice GH/GHO/GAE V1.0 / 02.14 Page 41 / 126

6 GH 400/600/800 models 6.4 Commissioning The unit has been checked, adjusted and tested in our workshops. A. Make the hydraulic and electrical connections. B. Fill the tank with liquid. C. Start the unit (1). D. Check the direction of rotation of the pump. E. Adjust the settings below. (1) 6.5 Specific settings 6.5.1 Draining the tank A. Place a container under the drain plug located below the cooler (2). B. Open the drain valve. C. Close the drain valve once the tank is empty. (2) 6.5.2 Bleeding the primary circuit (chilled water) Some appliances are fitted with automatic bleed systems. For others, the cooler is lower than the system and bleeding occurs naturally. Fig. 6-4 : Starting and draining Nonetheless, on appliances fitted with progressive valves (generally made by BELIMO (orange motor)), we recommend opening the valve manually to circulate water through the heat exchanger at maximum flow rate for a few seconds. See section 14.1.2 Bleeding the installation - BELIMO valves on page 85 Page 42 / 126 Technical Notice GH/GHO/GAE V1.0 / 02.14

GHO 300 and GHO 500 models 7 Contents of the chapter This chapter contains information specific to the GHO 300 and GHO 500 models. It covers all aspects associated with installation, commissioning, settings and maintenance for these models. For purposes of clarity, only the GHO 500 model is described in this chapter. However, the same explanations apply to the GHO 300 model. 7.1 Description 7.1.1 Front view (1) (2) (3) (6) (5) (4) Fig. 7-1 : GHO 500 cooler (front view) (1) Hydraulic connector (inlet / outlet) (2) Thermostat display (3) Fault indicator light (red) (4) Main switch (5) Connectors for electricity supply (5 pin) (6) Connectors for electricity supply (5 pin, M12 male) Technical Notice GH/GHO/GAE V1.0 / 02.14 Page 43 / 126

7 GHO 300 and GHO 500 models 7.1.2 Technical specifications 7.1.2.1 Standard nominal conditions Description Unit GHO 300 GHO 500 Cooling power kw 3 5 Power input kw 1.1 1.1 Inlet temperature C 22 22 Outlet temperature C 18.5 18.5 Max central circuit temperature Central circuit minimum flow rate Diameter of mains supply connection C 15 15 L/min 10 17 G ¾"F ¾"F Internal pressure drops kpa 40 50 7.1.2.2 Electrical data Description Unit GHO 300 GHO 500 Nominal power kw 1.1 1.1 Maximum current A 2.5 2.5 Starting current A 15 15 Power supply Vx phxhz 400x3x50 400x3x50 7.1.2.3 Hydraulic circuit Description Unit GHO 300 GHO 500 Flow rate L/min 60 60 Total pressure bar 2.5 2.5 Tank capacity L Without Without Connection diameter G 1"F 1"F Page 44 / 126 Technical Notice GH/GHO/GAE V1.0 / 02.14

GHO 300 and GHO 500 models 7 7.1.2.4 Dimensions Description Unit GHO 300 GHO 500 Width mm 525 525 Height mm 682 682 Depth mm 495 495 Weight kg 58 58 7.1.2.5 Other characteristics Description Unit GHO 300 GHO 500 Standard colour - RAL 7035 RAL 7035 Noise rating ISO 3741 Lp db(a) 40 40 7.2 Handling The unit must be transported flat and must not sustain shocks. 7.3 Installation The unit is normally installed close to the machine, as shown on its installation drawings. During installation, allow for clearance of about 0.5 m around the cooler unit. 7.3.1 Hydraulic connections Unless otherwise specified, connections between the cooling unit and the machine may be made using pipes of cross-section at least equal to the diameter indicated in the technical specifications. See section 7.1.2 Technical specifications on page 44. 7.3.2 Electrical connections ELECTROCUTION The machine cabinet must be disconnected from power while connecting cables. Power cable fitted is 3 m in length (or as specified by the customer). Technical Notice GH/GHO/GAE V1.0 / 02.14 Page 45 / 126

7 GHO 300 and GHO 500 models 7.4 Commissioning The unit has been checked, adjusted and tested in our workshops. A. Make the hydraulic and electrical connections. B. Start the unit (1). C. Check the direction of rotation of the pump. D. Adjust the settings below. 7.5 Specific settings 7.5.1 Bleeding the primary circuit (chilled water) Some appliances are fitted with automatic bleed systems. For others, the cooler is lower than the system and bleeding occurs naturally. (1) Nonetheless, on appliances fitted with progressive valves (generally made by BELIMO (orange motor)), we recommend opening the valve manually to circulate water through the heat exchanger at maximum flow rate for a few seconds. Fig. 7-2 : Starting up See section 14.1.2 Bleeding the installation - BELIMO valves on page 85 Page 46 / 126 Technical Notice GH/GHO/GAE V1.0 / 02.14

GHO 600/800 models 8 Contents of the chapter This chapter contains information specific to the GHO 600 and GHO 800 models. It covers all aspects associated with installation, commissioning, settings and maintenance for these models. For purposes of clarity, only the GHO 600 model is described in this chapter. However, the same explanations apply to the GHO 800 model. 8.1 Description 8.1.1 Front view (1) (2) (3) (4) (5) (6) (7) Fig. 8-1 : GHO 600 cooler (front view) (1) Omron thermostat display (option) (2) Thermostat display (3) Programmable logic controller display (option) (4) Fault indicator light (red) (5) Fault indicator light (red) (6) Main switch (7) Pressure gauge (option) Technical Notice GH/GHO/GAE V1.0 / 02.14 Page 47 / 126

8 GHO 600/800 models 8.1.2 Rear view (8) (9) (15) (10) (14) (11) (13) (12) Fig. 8-2 : GH0 600 cooler (rear view) (8) Chilled water inlet (9) Chilled water outlet (10) TA valve (option) (11) Unit outlet (12) Connector for options (13) Connectors for electricity supply (14) Unit inlet (15) Filter Page 48 / 126 Technical Notice GH/GHO/GAE V1.0 / 02.14

GHO 600/800 models 8 8.1.3 Technical specifications 8.1.3.1 Standard nominal conditions Description Unit GHO 600 GHO 800 Cooling power kw 6 8 Power input kw 2 2 Inlet temperature C 22 22 Outlet temperature C 18.4 18.4 Max central circuit temperature Central circuit minimum flow rate Diameter of mains supply connection C 15 15 L/min 25 25 G 1"F 1"F Internal pressure drops kpa 50 50 8.1.3.2 Electrical data Description Unit GHO 600 GHO 800 Nominal power kw 2 2 Maximum current A 4.5 4.5 Starting current A 15 15 Power supply Vx phxhz 400x3x50 400x3x50 8.1.3.3 Hydraulic circuit Description Unit GHO 600 GHO 800 Flow rate L/min 75 100 Total pressure bar 2.5 2.5 Tank capacity l Without Without Connection diameter G 1½"F 1½"F Technical Notice GH/GHO/GAE V1.0 / 02.14 Page 49 / 126

8 GHO 600/800 models 8.1.3.4 Dimensions Description Unit GHO 600 GHO 800 Width mm 614 614 Height mm 610 610 Depth mm 621 621 Weight kg 80 80 8.1.3.5 Other characteristics Description Unit GHO 600 GHO 800 Standard colour - RAL 7035 RAL 7035 Noise rating ISO 3741 Lp db(a) 40 40 Page 50 / 126 Technical Notice GH/GHO/GAE V1.0 / 02.14

GHO 600/800 models 8 8.2 Handling The unit must be transported flat and must not sustain shocks. 8.3 Installation The unit is normally installed close to the machine, as shown on its installation drawings. During installation, allow for clearance of about 0.5 m around the cooler unit. 8.3.1 Hydraulic connections Unless otherwise specified, connections between the cooling unit and the machine may be made using pipes of cross-section at least equal to the diameter indicated in the technical specifications. See section 8.1.3 Technical specifications on page 49. 8.3.2 Electrical connections ELECTROCUTION The machine cabinet must be disconnected from power while connecting cables. Power cable fitted is 3 m in length (or as specified by the customer). Technical Notice GH/GHO/GAE V1.0 / 02.14 Page 51 / 126

8 GHO 600/800 models 8.4 Commissioning The unit has been checked, adjusted and tested in our workshops. A. Make the hydraulic and electrical connections. B. Start the unit (1). C. Check the direction of rotation of the pump. D. Adjust the settings below. (1) 8.5 Specific settings 8.5.1 Bleeding the primary circuit (chilled water) Some appliances are fitted with automatic bleed systems. For others, the cooler is lower than the system and bleeding occurs naturally. Nonetheless, on appliances fitted with progressive valves (generally made by BELIMO (orange motor)), we recommend opening the valve manually to circulate water through the heat exchanger at maximum flow rate for a few seconds. See section 14.1.2 Bleeding the installation - BELIMO valves on page 85 Fig. 8-3 : Starting up Page 52 / 126 Technical Notice GH/GHO/GAE V1.0 / 02.14

GHO 510/810/1010 models 9 Contents of the chapter This chapter contains information specific to the GHO 510, GHO 810 and GHO 1010 models. It covers all aspects associated with installation, commissioning, settings and maintenance for these models. For purposes of clarity, only the GHO 510 model is described in this chapter. However, the same explanations apply to the GHO 810 and GHO 1010 models. 9.1 Description 9.1.1 Front view (1) (2) (3) (4) Fig. 9-1 : GHO 510 cooler (front view) (1) Programmable logic controller display (option, visible after opening the cover panel) (2) Thermostat display (3) Fault indicator light (red) (4) Main switch Technical Notice GH/GHO/GAE V1.0 / 02.14 Page 53 / 126

9 GHO 510/810/1010 models 9.1.2 Rear view (5) (6) (7) (12) (8) (11) (10) (9) Fig. 9-2 : GHO 510 cooler (rear view) (5) Chilled water outlet (6) Chilled water inlet (7) Filter (8) TA valve (option) (9) Connectors for electricity supply (10) Unit inlet (11) Unit outlet (12) High power pump Page 54 / 126 Technical Notice GH/GHO/GAE V1.0 / 02.14

GHO 510/810/1010 models 9 9.1.3 Technical specifications 9.1.3.1 Standard nominal conditions Description Unit GHO 510 GHO 810 GHO 1010 Cooling power kw 5 8 10 Power input kw 0.8 0.8 2 Inlet temperature C 22 22 22 Outlet temperature C 18.5 18.5 18.4 Max central circuit temperature Central circuit minimum flow rate Diameter of mains supply connection C 15 15 15 L/min 17 17 25 G 1"F 1¼" 1¼" Internal pressure drops kpa 50 50 50 9.1.3.2 Electrical data Description Unit GHO 510 GHO 810 GHO 1010 Nominal power kw 0.8 0.8 2 Maximum current A 2.2 2.2 4.5 Starting current A 15 15 20 Power supply Vx phxhz 400x3x50 400x3x50 400x3x50 9.1.3.3 Hydraulic circuit Description Unit GHO 510 GHO 810 GHO 1010 Flow rate L/min 60 60 100 Total pressure bar 2.5 2.5 2.5 Tank capacity L Without Without Without Connection diameter G ¾"F 1½"F 1½"F Technical Notice GH/GHO/GAE V1.0 / 02.14 Page 55 / 126

9 GHO 510/810/1010 models 9.1.3.4 Dimensions Description Unit GHO 510 GHO 810 GHO 1010 Width mm 560 560 607 Height mm 1160 1160 1254 Depth mm 725 725 60 Weight kg 105 120 182 9.1.3.5 Other characteristics Description Unit GHO 510 GHO 810 GHO 1010 Standard colour - RAL 7035 RAL 7035 RAL 7035 Noise rating ISO 3741 Lp db(a) 40 40 40 Page 56 / 126 Technical Notice GH/GHO/GAE V1.0 / 02.14

GHO 510/810/1010 models 9 9.2 Handling The unit must be transported flat and must not sustain shocks. 9.3 Installation The unit is normally installed close to the machine, as shown on its installation drawings. During installation, allow for clearance of about 0.5 m around the cooler unit. 9.3.1 Hydraulic connections Unless otherwise specified, connections between the cooling unit and the machine may be made using pipes of cross-section at least equal to the diameter indicated in the technical specifications. See section 9.1.3 Technical specifications on page 55. 9.3.2 Electrical connections ELECTROCUTION The machine cabinet must be disconnected from power while connecting cables. Power cable fitted is 3 m in length (or as specified by the customer). Technical Notice GH/GHO/GAE V1.0 / 02.14 Page 57 / 126

9 GHO 510/810/1010 models 9.4 Commissioning The unit has been checked, adjusted and tested in our workshops. A. Make the hydraulic and electrical connections. B. Start the unit (1). C. Check the direction of rotation of the pump. D. Adjust the settings below. (1) 9.5 Specific settings 9.5.1 Bleeding the primary circuit (chilled water) Some appliances are fitted with automatic bleed systems. For others, the cooler is lower than the system and bleeding occurs naturally. Nonetheless, on appliances fitted with progressive valves (generally made by BELIMO (orange motor)), we recommend opening the valve manually to circulate water through the heat exchanger at maximum flow rate for a few seconds. Fig. 9-3 : Starting up See section 14.1.2 Bleeding the installation - BELIMO valves on page 85 Page 58 / 126 Technical Notice GH/GHO/GAE V1.0 / 02.14

GH 1000 to 1800/2000/2400 models 10 Contents of the chapter This chapter contains information specific to the GH 1000 to GH 1800, GH 2000 and GH 2400 models. It covers all aspects associated with installation, commissioning, settings and maintenance for these models. For purposes of clarity, only the GH 1000 model is described in this chapter. However, the same explanations apply to the GH 1800, GH 2000 and GH 2400 models. 10.1 Description 10.1.1 Front view (1) (2) (3) (4) (5) Fig. 10-1 : GH 1000 cooler (front view) (1) Programmable logic controller display (option, visible after opening the cover panel) (2) Thermostat display (3) Fault indicator light (red) (4) Main switch (5) Pressure gauge (option) Technical Notice GH/GHO/GAE V1.0 / 02.14 Page 59 / 126

10 GH 1000 to 1800/2000/2400 models 10.1.2 Rear view (6) (7) (8) (14) (9) (13) (10) (11) (12) Fig. 10-2 : GH 1000 cooler (rear view) (6) Chilled water outlet (7) Chilled water inlet (8) Filter (9) Connectors for electricity supply (10) Filler plug (11) Drain plug (12) Water level sight glass (13) Unit inlet (14) Unit outlet Page 60 / 126 Technical Notice GH/GHO/GAE V1.0 / 02.14

GH 1000 to 1800/2000/2400 models 10 10.1.3 Technical specifications 10.1.3.1 Standard nominal conditions Description Unit GH 1000 to 1800 GH 2000/2400 Cooling power kw 10/18 20/24 Power input kw 1.2 1.2 Inlet temperature C 22 22 Outlet temperature C 18.5/17 18.5/17.7 Max central circuit temperature Central circuit minimum flow rate Diameter of mains supply connection C 15 15 L/min 50 80 G ¾"F 1"F Internal pressure drops kpa 50 50 10.1.3.2 Electrical data Description Unit GH 1000 to 1800 GH 2000/2400 Nominal power kw 1.2 1.2 Maximum current A 3 3 Starting current A 15 15 Power supply Vx phxhz 400x3x50 400x3x50 10.1.3.3 Hydraulic circuit Description Unit GH 1000 to 1800 GH 2000/2400 Flow rate L/min 35 50 Total pressure bar 2.5 2.5 Tank capacity L 145 145 Connection diameter G 1"F 1"F Technical Notice GH/GHO/GAE V1.0 / 02.14 Page 61 / 126

10 GH 1000 to 1800/2000/2400 models 10.1.3.4 Dimensions Description Unit GH 1000 to 1800 GH 2000/2400 Width mm 607 607 Height mm 1254 1254 Depth mm 860 860 Weight kg 182 220 10.1.3.5 Other characteristics Description Unit GH 1000 to 1800 GH 2000/2400 Standard colour - RAL 7035 RAL 7035 Noise rating ISO 3741 Lp db(a) 41 41 Page 62 / 126 Technical Notice GH/GHO/GAE V1.0 / 02.14

GH 1000 to 1800/2000/2400 models 10 10.2 Handling The unit must be transported flat and must not sustain shocks. 10.3 Installation The unit is normally installed close to the machine, as shown on its installation drawings. During installation, allow for clearance of about 0.5 m around the cooler unit. 10.3.1 Hydraulic connections Unless otherwise specified, connections between the cooling unit and the machine may be made using pipes of cross-section at least equal to the diameter indicated in the technical specifications. See section 10.1.3 Technical specifications on page 61. 10.3.2 Electrical connections ELECTROCUTION The machine cabinet must be disconnected from power while connecting cables. Power cable fitted is 3 m in length (or as specified by the customer). 10.3.3 Filling the tank The liquids used are not suitable for human consumption. A. Prepare a mixture of water and 30% ethylene glycol. Do not use antifreeze for motor vehicles. Marksa recommends ANTIFROGEN N antifreeze. (1) B. Unscrew the cap (1). C. Fill the tank up to the maximum level indicated. D. Refit the cap. A certain quantity of fluid is used to fill the machine circuit. Monitor the level when starting the machine and top up as necessary. Fig. 10-3 : Filler cap Technical Notice GH/GHO/GAE V1.0 / 02.14 Page 63 / 126

10 GH 1000 to 1800/2000/2400 models 10.4 Commissioning The unit has been checked, adjusted and tested in our workshops. A. Make the hydraulic and electrical connections. B. Fill the tank with liquid. C. Start the unit (1). D. Check the direction of rotation of the pump. E. Adjust the settings below. (1) Fig. 10-4 : Starting up 10.5 Specific settings 10.5.1 Draining the tank A. Place a container under the drain valve or plug located below the cooler (2). B. Open the drain valve. C. Close the drain valve once the tank is empty. 10.5.2 Bleeding the primary circuit (chilled water) Some appliances are fitted with automatic bleed systems. For others, the cooler is lower than the system and bleeding occurs naturally. Nonetheless, on appliances fitted with progressive valves (generally made by BELIMO (orange motor)), we recommend opening the valve manually to circulate water through the heat exchanger at maximum flow rate for a few seconds. See section 14.1.2 Bleeding the installation - BELIMO valves on page 85 (2) Page 64 / 126 Technical Notice GH/GHO/GAE V1.0 / 02.14

GH 3000/3500/4700 models 11 Contents of the chapter This chapter contains information specific to the GH 3000, GH 3500 and GH 4700 models. It covers all aspects associated with installation, commissioning, settings and maintenance for these models. For purposes of clarity, only the GH 3000 model is described in this chapter. However, the same explanations apply to the GH 3500 and GH 4700 models. 11.1 Description 11.1.1 Front view (1) (2) (3) (4) (5) Fig. 11-1 : GH 3000 cooler (front view) (1) Programmable logic controller display (option, visible after opening the cover panel) (2) Thermostat display (3) Fault indicator light (red) (4) Main switch (5) Pressure gauge (option) Technical Notice GH/GHO/GAE V1.0 / 02.14 Page 65 / 126

11 GH 3000/3500/4700 models 11.1.2 Rear view (6) (7) (8) (14) (9) (13) (10) (11) (12) Fig. 11-2 : GH 3000 cooler (rear view) (6) Chilled water outlet (7) Chilled water inlet (8) Filter (9) Connectors for electricity supply (10) Filler plug (11) Drain plug (12) Water level sight glass (13) Unit inlet (14) Unit outlet Page 66 / 126 Technical Notice GH/GHO/GAE V1.0 / 02.14

GH 3000/3500/4700 models 11 11.1.3 Technical specifications 11.1.3.1 Standard nominal conditions Description Unit GH 3000 GH 3500 GH 4700 Cooling power kw 30 35 47 Power input kw 1.3 1.3 1.3 Inlet temperature C 22 22 22 Outlet temperature C 17.7 17 15.2 Max central circuit temperature Central circuit minimum flow rate Diameter of mains supply connection C 15 15 15 L/min 100 120 160 G 50 50 50 Internal pressure drops kpa 1¼"F 1¼"F 1¼"F 11.1.3.2 Electrical data Description Unit GH 3000 GH 3500 GH 4700 Nominal power kw 1.3 1.3 1.3 Maximum current A 3.3 3.3 3.3 Starting current A 16 16 16 Power supply Vx phxhz 400x3x50 400x3x50 400x3x50 11.1.3.3 Hydraulic circuit Description Unit GH 3000 GH 3500 GH 4700 Flow rate L/min 100 120 120 Total pressure bar 2.5 2.5 2.5 Tank capacity L 145 145 145 Connection diameter G 1½"F 1½"F 2"F Technical Notice GH/GHO/GAE V1.0 / 02.14 Page 67 / 126

11 GH 3000/3500/4700 models 11.1.3.4 Dimensions Description Unit GH 3000 GH 3500 GH 4700 Width mm 607 607 607 Height mm 1254 1254 1254 Depth mm 860 860 860 Weight kg 230 230 230 11.1.3.5 Other characteristics Description Unit GH 3000 GH 3500 GH 4700 Standard colour - RAL 7035 RAL 7035 RAL 7035 Noise rating ISO 3741 Lp db(a) 41 42 42 Page 68 / 126 Technical Notice GH/GHO/GAE V1.0 / 02.14

GH 3000/3500/4700 models 11 11.2 Handling The unit must be transported flat and must not sustain shocks. 11.3 Installation The unit is normally installed close to the machine, as shown on its installation drawings. During installation, allow for clearance of about 0.5 m around the cooler unit. 11.3.1 Hydraulic connections Unless otherwise specified, connections between the cooling unit and the machine may be made using pipes of cross-section at least equal to the diameter indicated in the technical specifications. See section 11.1.3 Technical specifications on page 67. 11.3.2 Electrical connections ELECTROCUTION The machine cabinet must be disconnected from power while connecting cables. Power cable fitted is 3 m in length (or as specified by the customer). 11.3.3 Filling the tank The liquids used are not suitable for human consumption. A. Prepare a mixture of water and 30% ethylene glycol. Do not use antifreeze for motor vehicles. Marksa recommends ANTIFROGEN N antifreeze. (1) B. Unscrew the cap (1). C. Fill the tank up to the maximum level indicated. D. Refit the cap. A certain quantity of fluid is used to fill the machine circuit. Monitor the level when starting the machine and top up as necessary. Fig. 11-3 : Filler cap Technical Notice GH/GHO/GAE V1.0 / 02.14 Page 69 / 126

11 GH 3000/3500/4700 models 11.4 Commissioning The unit has been checked, adjusted and tested in our workshops. A. Make the hydraulic and electrical connections. B. Fill the tank with liquid. C. Start the unit (1). D. Check the direction of rotation of the pump. E. Adjust the settings below. (1) Fig. 11-4 : Starting up 11.5 Specific settings 11.5.1 Draining the tank A. Place a container under the drain valve or plug located below the cooler (2). B. Open the drain valve. C. Close the drain valve once the tank is empty. 11.5.2 Bleeding the primary circuit (chilled water) Some appliances are fitted with automatic bleed systems. For others, the cooler is lower than the system and bleeding occurs naturally. Nonetheless, on appliances fitted with progressive valves (generally made by BELIMO (orange motor)), we recommend opening the valve manually to circulate water through the heat exchanger at maximum flow rate for a few seconds. See section 14.1.2 Bleeding the installation - BELIMO valves on page 85 (2) Fig. 11-5 : Draining Page 70 / 126 Technical Notice GH/GHO/GAE V1.0 / 02.14

GH Double models 12 Contents of the chapter This chapter contains information specific to the GH Double models. It covers all aspects associated with installation, commissioning, settings and maintenance for these models. For purposes of clarity, only the GH 200 + 200 model is described in this chapter. However, the same explanations apply to all the GH Double models. 12.1 Description The GH Double models occupy a smaller floor area. Power ratings vary depending on the customer's specifications. 12.1.1 Front view (1) (1) (2) (3) (4) (5) (6) Fig. 12-1 : GH Double cooler (front view) (1) Thermostat display (2) Fault indicator light (red) (3) Programmable logic controller display (option, visible after opening the cover panel) (4) Main switch (5) Level detector (6) Drain valve The filling point is located inside the unit. Technical Notice GH/GHO/GAE V1.0 / 02.14 Page 71 / 126

12 GH Double models 12.1.2 Rear view (7) (8) (15) (14) (13) (9) (10) (12) (13) (11) (12) Fig. 12-2 : GH Double cooler (rear view) (7) Chilled water inlet (8) Chilled water outlet (9) TA valve (option) (10) Filter (11) Connectors for electricity supply (12) Unit outlet (13) Unit inlet (14) Side door (15) Bolt, without key Page 72 / 126 Technical Notice GH/GHO/GAE V1.0 / 02.14

GH Double models 12 12.1.3 Technical specifications 12.1.3.1 Dimensions Description Unit GH Double Width mm 501 Height mm 1132 Depth mm 782 Weight kg 138 12.1.3.2 Other characteristics Description Unit GH Double Standard colour - RAL 7035 Noise rating ISO 3741 Lp db(a) 40 For technical specifications not listed above, refer to chapters for models: GH 80 - See section 3.1.2 Technical specifications on page 20 GH 100 - See section 4.1.2 Technical specifications on page 26 GH 300 - See section 7.1.2 Technical specifications on page 44 GH 400/600/800 - See section 6.1.3 Technical specifications on page 39 Technical Notice GH/GHO/GAE V1.0 / 02.14 Page 73 / 126

12 GH Double models 12.2 Handling The unit must be transported flat and must not sustain shocks. 12.3 Installation The unit is normally installed close to the machine, as shown on its installation drawings. During installation, allow for clearance of about 0.5 m around the cooler unit. 12.3.1 Hydraulic connections Unless otherwise specified, connections between the cooling unit and the machine may be made using pipes of cross-section at least equal to the diameter indicated in the technical specifications. See section 12.1.3 Technical specifications on page 73. 12.3.2 Electrical connections ELECTROCUTION The machine cabinet must be disconnected from power while connecting cables. Power cable fitted is 3 m in length (or as specified by the customer). Page 74 / 126 Technical Notice GH/GHO/GAE V1.0 / 02.14

GH Double models 12 12.3.3 Filling the tank The liquids used are not suitable for human consumption. A. Prepare a mixture of water and 30% ethylene glycol. Do not use antifreeze for motor vehicles. Marksa recommends ANTIFROGEN N antifreeze. (1) B. Unlock (4 keyless bolts) and remove the side door. C. Unscrew the caps (1). D. Fill the two tanks up to the maximum level indicated. E. Replace the caps. A certain quantity of fluid is used to fill the machine circuit. Monitor the level when starting the machine and top up as necessary. Fig. 12-3 : Filler caps Technical Notice GH/GHO/GAE V1.0 / 02.14 Page 75 / 126

12 GH Double models 12.4 Commissioning The unit has been checked, adjusted and tested in our workshops. A. Make the hydraulic and electrical connections. B. Fill the tank with liquid. C. Start the unit (1). D. Check the direction of rotation of the pump. E. Adjust the settings below. (1) 12.5 Specific settings 12.5.1 Draining the tank A. Place a container under the drain valve or plug located below the cooler (2). B. Open the drain valve. C. Close the drain valve once the tank is empty. 12.5.2 Bleeding the primary circuit (chilled water) (2) Some appliances are fitted with automatic bleed systems. For others, the cooler is lower than the system and bleeding occurs naturally. Nonetheless, on appliances fitted with progressive valves (generally made by BELIMO (orange motor)), we recommend opening the valve manually to circulate water through the heat exchanger at maximum flow rate for a few seconds. Fig. 12-4 : Starting and draining See section 14.1.2 Bleeding the installation - BELIMO valves on page 85 Page 76 / 126 Technical Notice GH/GHO/GAE V1.0 / 02.14

GAE models 13 Contents of the chapter This chapter contains information specific to the GAE model. It covers all aspects associated with installation, commissioning, adjustment and maintenance for this model. 13.1 Description 13.1.1 Front view (1) (2) Fig. 13-1 : GAE cooler (front view) (1) Thermostat display (2) Cabinet lock (double web key) Technical Notice GH/GHO/GAE V1.0 / 02.14 Page 77 / 126

13 GAE models 13.1.2 Rear view (3) (4) Fig. 13-2 : GAE cooler (rear view) (3) Fan (4) Hydraulic / electrical connections Page 78 / 126 Technical Notice GH/GHO/GAE V1.0 / 02.14

GAE models 13 13.1.3 Technical specifications 13.1.3.1 Standard nominal conditions Description Unit GAE (230V) GAE (400V) Cooling power kw 1.5 1.5 Power input W 0.4 0.4 Air inlet temperature C 35 35 Air outlet temperature C 25 25 Max central circuit temperature Central circuit minimum flow rate Diameter of mains supply connection C 15 15 L/min 10 10 mm ½"F ½"F Internal pressure drops kpa 30 30 13.1.3.2 Electrical data Description Unit GAE (230V) GAE (400V) Nominal power kw 0.085 0.085 Maximum current A 0.45 0.35 Power supply Vx phxhz 230x1x50 400x1x50 13.1.3.3 Flow rate Description Unit GAE (230V) GAE (400V) Fan flow rate m 3 /h 410 410 Technical Notice GH/GHO/GAE V1.0 / 02.14 Page 79 / 126

13 GAE models 13.1.3.4 Dimensions Description Unit GAE (230V) GAE (400V) Width mm 410 410 Height mm 950 950 Depth mm 162 162 Weight kg 32 32 13.1.3.5 Other characteristics Description Unit GAE (230V) GAE (400V) Standard colour - RAL 7035 RAL 7035 Noise rating ISO 3741 Lp db(a) 32 32 Page 80 / 126 Technical Notice GH/GHO/GAE V1.0 / 02.14

GAE models 13 13.2 Handling The unit must be transported flat and must not sustain shocks. 13.3 Installation The unit is normally installed close to the machine, as shown on its installation drawings. During installation, allow for clearance of about 0.5 m around the cooler unit. 13.3.1 Hydraulic connections Unless otherwise specified, connections between the cooling unit and the machine may be made using pipes of cross-section at least equal to the diameter indicated in the technical specifications. See section 13.1.3 Technical specifications on page 79. 13.3.2 Electrical connections ELECTROCUTION The machine cabinet must be disconnected from power while connecting cables. Power cable fitted is 3 m in length (or as specified by the customer). Technical Notice GH/GHO/GAE V1.0 / 02.14 Page 81 / 126

13 GAE models 13.4 Commissioning The unit has been checked, adjusted and tested in our workshops. A. Make the hydraulic and electrical connections. B. The unit is started after switching on the power at the electrical cabinet (customer). See settings below. 13.5 Specific settings 13.5.1 Bleeding the primary circuit (chilled water) Some appliances are fitted with automatic bleed systems. For others, the cooler is lower than the system and bleeding occurs naturally. Nonetheless, on appliances fitted with progressive valves (generally made by BELIMO (orange motor)), we recommend opening the valve manually to circulate water through the heat exchanger at maximum flow rate for a few seconds. See section 14.1.2 Bleeding the installation - BELIMO valves on page 85 Page 82 / 126 Technical Notice GH/GHO/GAE V1.0 / 02.14

Settings and maintenance 14 Contents of the chapter This chapter describes the various possible settings and maintenance operations common to the entire range of GH coolers. 14.1 Settings 14.1.1 Thermostat The thermostat is different on units equipped with the progressive adjustment option. See section 15.1.5 Progressive adjustment (U) on page 92. 888 Prg mute Set out def 14.1.1.1 Description of buttons (1) PRG/mute button Stops the thermostat alarm (2) UP / out button Increases the displayed data value Goes to the previous parameter (3) SET button Fixes the setpoint Displays the value of the selected parameter (4) DOWN / def button Decreases the displayed data value Goes to the next parameter 14.1.1.2 Indications on the display (1) (2) (3) (4) Fig. 14-1 : Thermostat buttons COMP...1 LED indicates that the compressor is running. Operation...The value displayed is the value measured by the temperature sensor. 14.1.1.3 Change the setpoint A. Press SET (3) for 1 second. Its value is displayed. The selected value flashes after a few moments. B. Increase or decrease the setpoint using the UP (2) and DOWN (4) keys. C. Press SET (3) to confirm the selection. 14.1.1.4 Stop the alarm A. Press PRG (1). The code is stored until the alarm is cleared. Technical Notice GH/GHO/GAE V1.0 / 02.14 Page 83 / 126

14 Settings and maintenance 14.1.1.5 Changing parameters A. Press the PRG key (1) for more than 5 seconds. The code for the first modifiable parameter appears on the display. B. Press the UP (2) or DOWN (4) keys to find the parameter to be changed. C. Press SET (3) to display the value of the selected parameter. D. Change the value with the UP/DOWN keys until the desired value is reached. E. Press the SET (3) key again to store the new value and display the next parameter. F. Press the PRG (1) key to store the new value and exit the procedure for modifying parameters. To exit without modifying parameters: wait 60 seconds without pressing any keys. Parameter Symbol Type Min. Max. Unit Set value Differential regulator F 0.1 +19.9 C / F 2 Table 14-1: Setting parameters The only parameter the user is allowed to modify is the differential for the regulator. Changing any other parameter can change operation of the cooler inappropriately. Marksa SA declines any liability if parameters are modified without authorisation. Page 84 / 126 Technical Notice GH/GHO/GAE V1.0 / 02.14

Settings and maintenance 14 14.1.2 Bleeding the installation - BELIMO valves It is possible to open progressive valves (generally BELIMO make (orange motor)) on the water inlet from the system manually and temporarily, to flush the installation by circulating water through the heat exchanger at maximum flow rate. (1) 14.1.2.1 BELIMO TR24-SR valve A. Press and turn button (1) to open the valve manually to circulate water through the heat exchanger at maximum flow rate for a few seconds. 14.1.2.2 BELIMO LR24A-SR on/off valve Fig. 14-2 : BELIMO TR24-SR valve A. Press and turn on/off button (1) to open the valve manually to circulate water through the heat exchanger at maximum flow rate for a few seconds. B. Pressing the side of the button holds the valve in the open position. Press on/off button (1) again to release it. (1) Fig. 14-3 : BELIMO LR24A-SR on/off valve Technical Notice GH/GHO/GAE V1.0 / 02.14 Page 85 / 126

14 Settings and maintenance 14.2 Maintenance 14.2.1 Periodic maintenance Regular maintenance by skilled staff ensures reliable and efficient operation of the cooling unit. 14.2.2 Safety ELECTROCUTION AND SERIOUS INJURIES Always disconnect the cooler from the power supply before any maintenance operation. 14.2.3 Maintenance table Interval Weekly Monthly Annually Liquid level X Check for clogging of the water filter X Check the cooling and hydraulic circuits Check play in the motor bearing for the fan (GAE) X X 14.2.4 Weekly maintenance A. Check that the liquid is at the maximum level in the indicator. An electric level detector may be fitted as an option. B. Restart the unit by rocking the switch. 14.2.5 Monthly maintenance A. Check for clogging of the water filter. B. If necessary, blow compressed air through the sieve (1). C. Restart the unit by rocking the switch. (1) Fig. 14-4 : Filter Page 86 / 126 Technical Notice GH/GHO/GAE V1.0 / 02.14

Settings and maintenance 14 14.2.6 Annual maintenance Turn off the electricity at the machine supply cabinet. A. GAE (only): Check the bearing for the fan motor and, if necessary, replace the bearing. B. GAE (only): Clean the fan blades. C. Inspect all components visually (including cables) to ensure that none of these items is broken, damaged or clogged (filter). D. Visually inspect all pipework connections for the hydraulic circuit. Traces of water may indicate failure of a seal. E. Restart the unit by rocking the switch. Technical Notice GH/GHO/GAE V1.0 / 02.14 Page 87 / 126

14 Settings and maintenance Page left intentionally blank. Page 88 / 126 Technical Notice GH/GHO/GAE V1.0 / 02.14

Options 15 Contents of the chapter This chapter different options and their availability depending on cooler unit models. 15.1 List of options Legend: O: Option X: Standard Option (abbreviation) GH 80 GH 100 GH 300 GH 400 600 800 GHO 500 600 800 GHO 510 810 1010 GH 1000 1800 GH 2000 2400 GH 3000 3500 4700 GH Double GAE Cleanable heat exchanger (B) - - - - O O - - - - - Manifold (D) O O O O O O O O O O - 400 V power supply (E) - - O X X X X X X X O Flow rate controller (F) O O O O O O O O O O - Pre-heating kit (H) - - O O O O O O O O - Insulation of the tank (I) O O O O - - O O O O - By-pass (J) O O O O - - O O O O - Differential thermostat O O O O O O O O O O - (L) Frame on wheels (M) O O O O O O O O O O - Level detector (N) X X X X - - X X X X - Pressurised water circuit - - - - - - - O O O - (P) High power pump (R) - O O O O O O O - Timer (T) - - O O O O O O O O - Progressive adjustment O O O O O O O O O O - (U) Pressure gauge (V) - - O O O O O O O O - Programmable troubleshooting logic controller (Y) - - O O O O O X X X - TA valve (X) O O O O O O O O O O - Table 15-1: List of options Technical Notice GH/GHO/GAE V1.0 / 02.14 Page 89 / 126

15 Options 15.1.1 Cleanable heat exchanger (B) 15.1.1.1 Description of the option Used to convey oil with particles larger than 500 µl. (1) (2) Fig. 15-1 : Cleanable heat exchanger (1) Cleanable heat exchanger (2) End plates Page 90 / 126 Technical Notice GH/GHO/GAE V1.0 / 02.14

Options 15 15.1.1.2 Maintenance BURNS Before performing any work on the appliance, turn off the electricity power supply. Be careful of certain parts of the cooling circuit, which may be very hot (particularly copper pipes). A. Stop the unit. B. Unscrew to the cover plates (2) from the heat exchanger. (1) (2) Fig. 15-2 : Cleanable heat exchanger Be careful of the oil contained in the heat exchanger. C. Clean the upper and lower chambers (1) and end plates (2). D. Refit the end plates. 15.1.1.3 Troubleshooting No special troubleshooting procedures. 15.1.2 Manifold (D) 15.1.2.1 Description of the option The manifold distributes cooling liquid in several circuits. 15.1.2.2 Maintenance No special maintenance procedures. 15.1.2.3 Troubleshooting No special troubleshooting procedures. 15.1.3 400 V power supply (E) 15.1.3.1 Description of the option A 400 V power supply makes the electrical components highly reliable. 15.1.3.2 Maintenance No special maintenance procedures. 15.1.3.3 Troubleshooting No special troubleshooting procedures. Technical Notice GH/GHO/GAE V1.0 / 02.14 Page 91 / 126

15 Options 15.1.4 Flow rate controller (F) 15.1.4.1 Description of the option The flow rate controller (1) detects a fault in the external cooling circuit (customer machine). Its operation is delayed to avoid displaying unnecessary errors when starting the cooler unit. (1) Fig. 15-3 : Schematic diagram (1) Flow rate controller - 15.1.4.2 Maintenance No special maintenance procedures. 15.1.4.3 Troubleshooting 'flow fault' message on the programmable logic controller - Cooling circuit blocked Check the hydraulic circuit Check the water level in the tank Dimensions of the connecting pipes Direction of rotation of the pump 15.1.5 Progressive adjustment (U) 15.1.5.1 Description of the option (1) The option of progressive adjustment (1) maintains the liquid at a precise temperature regulating by controlling the water flow rate in the primary circuit. Page 92 / 126 Technical Notice GH/GHO/GAE V1.0 / 02.14

Options 15 Accuracy of the order of 1/20 C is possible by adding the Omron thermostat. (1) (2) (3) Fig. 15-4 : Schematic diagram (1) Progressive adjustment (2) Omron thermostat See section 15.1.5.4 Omron E5CN thermostat on page 94 (3) 2-way valve See section 14.1.2 Bleeding the installation - BELIMO valves on page 85 See section 15.1.5.5 Omron E5CC thermostat on page 96 15.1.5.2 Maintenance No special maintenance procedures. 15.1.5.3 Troubleshooting No special troubleshooting procedures. Technical Notice GH/GHO/GAE V1.0 / 02.14 Page 93 / 126

15 Options 15.1.5.4 Omron E5CN thermostat Description (1) Display no. 1 (PV) Displays the temperature value / current process. (1) (2) The value displayed is the value measured by the temperature sensor. (2) Display no. 2 (SV) Displays the setpoint value to be used. The value displayed is the value measured by the temperature sensor. (3) Operation indicator lights (4) Level key (5) Mode key (6) Down key (7) Up key Activation of autotuning A. Press (4) for less than one second: 'LAdJ' displayed. (3) (4) (5) (6) (7) Fig. 15-5 : Display of E5CN thermostat B. Press the key (5) once:'at' displayed. C. Press the key (7): the display changes from 'OFF' to 'At 2'. Auto Tuning is activated; this function may take ten or twenty minutes or more. If the regulator is locked, then function is not accessible. To unlock it: A. Press (4) and (5) simultaneously for more than 3 seconds. B. The display shows 'oapt', press (6) to display '0'. C. Then press (5) once, the display shows 'ccpt'. D. Display '0' using (6) or (7). E. To exit the mode, press (4) and (5) for more than 3 seconds. Page 94 / 126 Technical Notice GH/GHO/GAE V1.0 / 02.14

Options 15 Settings (Omron E5CN) The values shown below are given for information only. Symbol Type Value Adjustment P Proportional strip 0.9 I Total time 65 d Diversion time 11 Setting CN-T 1 du C SL-H Max setpoint 35 SL-L Min setpoint 20 CNTL PID S-HC Stnd St OFF Orew d PtRN OFF ALt1 Type 1 alarm 1 ALH1 Hysteresis 1 ALt2 Type 2 alarm 1 ALH2 Hysteresis 1 To access advanced functions: AMoV Change the value from 0 to -169 Advanced functions Sb1N N-C Sb2N NO At-H 0.1 Out 1 0 SUb1 High&Low temperature ALM 1 SUb2 ALM2 Operation Al-1H Too hot 10 Al-1L Too cold 10 Al-2H Too hot 10 Al-2L Too cold 10 Technical Notice GH/GHO/GAE V1.0 / 02.14 Page 95 / 126

15 Options 15.1.5.5 Omron E5CC thermostat Description (1) Display no. 1 (PV) Displays the temperature value / current process. (1) (2) The value displayed is the value measured by the temperature sensor. (2) Display no. 2 (SV) Displays the setpoint value to be used. The value displayed is the value measured by the temperature sensor. (3) Operation indicator lights (4) Setting Level (5) Mode key (6) Unit change key (7) Down key (adjusting settings) (8) Up key (adjusting settings) (3) (4) (5) (6) (7) (8) Fig. 15-6 : Display of E5CC thermostat Activation of autotuning A. Press (4) for less than one second: 'LAdJ' displayed. B. Press the key (5) once:'at' displayed. C. Press the key (8): the display changes from 'OFF' to 'At 2'. Auto Tuning is activated; this function may take ten or twenty minutes or more. If the regulator is locked, then function is not accessible. To unlock it: A. Press (4) and (5) simultaneously for more than 3 seconds. B. The display shows 'oapt', press (7) to display '0'. C. Then press (5) once, the display shows 'ccpt'. D. Display '0' using (7) or (8). E. To exit the mode, press (4) and (5) for more than 3 seconds. Page 96 / 126 Technical Notice GH/GHO/GAE V1.0 / 02.14

Options 15 Settings (Omron E5CC) The values shown below are given for information only. Symbol Type Value Adjustment P Proportional strip 0.9 I Total time 65 d Diversion time 11 Setting CN-T 1 du C SL-H Max setpoint 35 SL-L Min setpoint 20 CNTL PID S-HC Stnd St OFF Orew d PtRN OFF ALt1 Type 1 alarm 1 ALH1 Hysteresis 1 ALt2 Type 2 alarm 1 ALH2 Hysteresis 1 oist Signal in ma 0-20 To access advanced functions: AMoV Change the value from 0 to -169 Advanced functions Sb1N N-C Sb2N NO At-H 0.1 Out 1 0 SUb1 High&Low temperature ALM 1 SUb2 ALM2 SUb3 NONE Operation Al-1H Too hot 10 Al-1L Too cold 10 Al-2H Too hot 10 Al-2L Too cold 10 Technical Notice GH/GHO/GAE V1.0 / 02.14 Page 97 / 126

15 Options 15.1.6 Pre-heating kit (H) 15.1.6.1 Description of the option Heating (1) is used to warm water that would be too cold, particularly when pre-heating the machine or when the coolers are located outside the building. A safety thermostat protects the tank from a fault in the heating system. H (1) Fig. 15-7 : Schematic diagram (1) Heating 15.1.6.2 Maintenance No special maintenance procedures. 15.1.6.3 Troubleshooting No special troubleshooting procedures. Page 98 / 126 Technical Notice GH/GHO/GAE V1.0 / 02.14

Options 15 15.1.7 Insulation of the tank (I) 15.1.7.1 Description of the option Insulating the cooler tank prevents condensation. This option is particularly recommended for coolers supplying water at a temperature below 15 C (59 F). 15.1.7.2 Maintenance No special maintenance procedures. 15.1.7.3 Troubleshooting No special troubleshooting procedures. Technical Notice GH/GHO/GAE V1.0 / 02.14 Page 99 / 126

15 Options 15.1.8 By-pass (J) 15.1.8.1 Description of the option If there is a pressure surge at the cooler outlet, the by-pass (1) opens and reinjects liquid into the tank to avoid damaging the external circuit. (1) Fig. 15-8 : Schematic diagram (2) By-pass - 15.1.8.2 Maintenance The by-pass is factory-set. No maintenance or adjustment by the customer is permitted. 15.1.8.3 Troubleshooting No special troubleshooting procedures. Page 100 / 126 Technical Notice GH/GHO/GAE V1.0 / 02.14

Options 15 15.1.9 Differential thermostat (L) 15.1.9.1 Description of the option In non-air-conditioned environments, the differential thermostat automatically adjusts the temperature of the cooling liquid. 15.1.9.2 Maintenance No special maintenance procedures. 15.1.9.3 Troubleshooting No special troubleshooting procedures. 15.1.10 Frame on wheels (M) 15.1.10.1 Description of the option Wheels fitted underneath the cooler unit make it easier to move the unit. 15.1.10.2 Maintenance No special maintenance procedures. 15.1.10.3 Troubleshooting No special troubleshooting procedures. Technical Notice GH/GHO/GAE V1.0 / 02.14 Page 101 / 126

15 Options 15.1.11 Level detector (N) 15.1.11.1 Description of the option A float switch (1) is used to monitor the liquid level in the tank. If the level is too low, and to avoid any damage, the cooler is stopped and an alarm appears on the programmer and/or an indicator light on the front panel is illuminated. It is recommended that the tank be filled above the visual indicator light. H (1) Fig. 15-9 : Schematic diagram (1) Level detector - 15.1.11.2 Maintenance No special maintenance procedures. 15.1.11.3 Troubleshooting The float switch no longer indicates the actual water level (float stuck) - Wrong type of antifreeze product or no antifreeze Drain the tank Clean the level switch Fill with the correct cooling liquid Page 102 / 126 Technical Notice GH/GHO/GAE V1.0 / 02.14

Options 15 15.1.12 Pressurised water circuit (P) 15.1.12.1 Description of the option The customer's part of the circuit is pressurised (4) (a few bar). P (1) (2) (3) (4) (5) (6) (7) Fig. 15-10 : Schematic diagram (1) Pressure gauge (2) Tank (3) Expansion vessel (4) Pressurised water circuit (5) Relief valve (6) Draining and filling valve (7) Bleed valve 15.1.12.2 Maintenance Reduced requirements for maintenance and inspection. The circuit is pressurised. Vent the pressure before performing any work on the customer's part of the cooling circuit: Open the drain valve (6) and check the pressure gauge (1) until zero pressure is reached. 15.1.12.3 Troubleshooting Bring in a specialist for any work required. Technical Notice GH/GHO/GAE V1.0 / 02.14 Page 103 / 126

15 Options 15.1.13 High power pump (R) 15.1.13.1 Description of the option A high power pump ensures better circulation of liquid when there are high pressure drops (e.g. cooling spindles). 15.1.13.2 Maintenance No special maintenance procedures. 15.1.13.3 Troubleshooting No special troubleshooting procedures. 15.1.14 Timer (T) 15.1.14.1 Description of the option The timer is used to turn the unit off outside normal working hours and turn it on again, if necessary. 15.1.14.2 Maintenance No special maintenance procedures. 15.1.14.3 Troubleshooting No special troubleshooting procedures. 15.1.15 Pressure gauge (V) 15.1.15.1 Description of the option Visual pressure indication. 15.1.15.2 Maintenance No special maintenance procedures. 15.1.15.3 Troubleshooting No special troubleshooting procedures. Page 104 / 126 Technical Notice GH/GHO/GAE V1.0 / 02.14

Options 15 15.1.16 Programmable troubleshooting logic controller (Y) 15.1.16.1 Description of the option The programmable logic controller (PLC) is used to monitor and determine unit operation, depending on the various control devices used (e.g. pressure gauge, level gauge, flow meter, switch, temperature probe, etc.). When a fault occurs, the red indicator light on the front of the unit comes on, causing the unit to shut down. The PLC displays the fault resolution procedure in 3 languages. It therefore provides support in the event of a problem. The PLC may be used as: a fault display unit a temperature display unit a temperature and fault display unit. It is located on the front control panel or in the electrical unit. + - i1 i2 i3 i4 ib ic id ie 24VDC DC INPUT CD12 A B ESC - + OK RELAY OUPUT 8A 01 02 03 04 (1) (2) (3) (4) (5) (6) (7) (8) (9) Fig. 15-11 : Programmable troubleshooting logic controller (front and right view) (1) PLC identification (6) - key: show input and output statuses (2) Main screen display See section 15.1.16.4 '-' key functions: on (3) A key, archiving menu (optional) page 108 See section 15.1.16.2 'A' key functions on page 106 (4) B key, settings menu See section 15.1.16.3 'B' key functions on page 107 (5) The ESC key (red), to exit a menu or cancel a setting. (7) + key: show useful information, version and Marksa SA contact details See section 15.1.16.5 '+' key functions on page 109 Adjustment using '-' or '+' key (in 'B' settings menu). After a 30 seconds of inactivity, the PLC exits a menu automatically. (8) OK (green), used to confirm a setting (9) EEPROM cover Technical Notice GH/GHO/GAE V1.0 / 02.14 Page 105 / 126

15 Options 15.1.16.2 'A' key functions A. A key (1): archiving menu (optional) B. This option is used to store 3 to 5 error codes in the memory. It is particularly useful when a breakdown occurs and personnel are not present. C. For error code interpretation information, contact Marksa SA. D. Press the A key on the front panel several times to show the archives. Press the ESC key (2) to exit this menu. The PLC exits this menu automatically after a few seconds of inactivity. Examples of archives when the regulation function is used: Main screen when the regulation function is used (3). Press the A key several times in succession to scroll through the messages on the display (4). Once you have scrolled through all the messages, the display shows the regulation temperature again (3). Fig. 15-12 : Display - A key (3) (1) (2) The error code depends on the event that occurred at a specific moment. It is a decimal number formed by combining the binary value of the 8 inputs, and in some cases the internal bits, as in this case. (4) When the regulation function is not used, the main screen is followed by the inputs and outputs screen and the Marksa SA contact details screen: the inputs and outputs screen Fig. 15-14 : Fig. 15-13 : Example error codes or the Marksa SA contact details screen Fig. 15-15 : Fig. 15-14 : Displays in non-regulation mode Fig. 15-15 : Displays in non-regulation mode Page 106 / 126 Technical Notice GH/GHO/GAE V1.0 / 02.14

Options 15 15.1.16.3 'B' key functions A. B key: settings menu B. Press the B key (1) on the front panel several times to browse through the various settings. Press the ESC key to exit this menu. The PLC exits this menu automatically after a few seconds of inactivity. Changing a setting A. Press the B key (1) several times in succession to locate the setting you wish to change. (1) (2) (3) Fig. 15-16 : Display - B key The content of the Settings menu may vary depending on the program installed. To find a setting, use the settings table. See section 15.1.16.7 Settings table (variable) on page 112. B. Select the setting. If the setting can be changed, select it using the - and + keys (2). The selected setting flashes. C. Press the OK key (3) to confirm your selection. D. Change the setting using the - or + key. Press the OK key to confirm your change. Technical Notice GH/GHO/GAE V1.0 / 02.14 Page 107 / 126

15 Options 15.1.16.4 '-' key functions: A. - key: show input and output statuses (1) B. To use this function, you need to press and hold the - key. The screen shown opposite appears. Fig. 15-17 : Where the pixels around an input or output are highlighted, the corresponding input or output is active (1). Voltage present for an input Relay contact closed for an output Where the pixels around an input or output are not highlighted, the corresponding input or output is inactive (2). Voltage not present for an input (2) Relay contact open for an output Fig. 15-17 : Inputs and outputs status The content of the Settings menu may vary depending on the program installed. To find a setting, use the settings table. (1) Inputs i1 to i4 and ib to ie (2) Outputs O1 to O4 See section 15.1.16.7 Settings table (variable) on page 112. Page 108 / 126 Technical Notice GH/GHO/GAE V1.0 / 02.14

Options 15 15.1.16.5 '+' key functions A. + key (1): show useful information: version and creation date Marksa SA contact details. Press the ESC key to exit this menu. The PLC exits this menu automatically after a few seconds of inactivity. B. Examples of screens when the regulation function is used: Press the + key several times in succession to scroll through the various screens on the display. Once you have scrolled through all the screens, the display shows the regulation temperature again. Fig. 15-18 : Display zoom (1) Fig. 15-19 : Version and contact details with regulation mode active Technical Notice GH/GHO/GAE V1.0 / 02.14 Page 109 / 126

15 Options C. When the regulation function is not used, the display shows: version and creation date or the Marksa SA contact details screen Fig. 15-20 : Version and Marksa SA contact details with regulation mode inactive Page 110 / 126 Technical Notice GH/GHO/GAE V1.0 / 02.14

Options 15 15.1.16.6 List of error messages (variable) In the event of a fault, a red indicator lights up on the unit. When the red indicator light is on, the display shows the explanation in 3 languages. In the event of a breakdown, the fault that caused the problem is shown and remains shown on the screen. Example messages: non-exhaustive list, dependent on the options purchased by the customer. Fig. 15-21 : Example messages Technical Notice GH/GHO/GAE V1.0 / 02.14 Page 111 / 126

15 Options 15.1.16.7 Settings table (variable) This table explains the acronyms used and allows you to select the setting you wish to change. The settings for the various controllers are provided with the diagrams and user guide CDs supplied with each device. Refer to the diagrams and the description in the table below (dependent on the options supplied, only certain parts of this list may apply). Code Description Default value if not specified Temperature settings (one regulator only) St Temperature set point - rd Regulator delta - r1 Minimum set point - r2 Maximum set point - c1 Minimum time between successive switch-ons 180 sec with a compressor, 30 sec with a pump and 10 sec with a solenoid valve A0 Differential between alarms AL and AH =2 C, relative to AL or AH AL Low Temperature threshold alarm =10 C, relative to set point St AH High Temperature threshold alarm =10 C, relative to set point St Ad Delay between temperature alarm and start-up 1,200 seconds /c1 Probe calibration - Temperature settings (more than one regulator). The number 1 is added to designate the first regulator. St1 Temperature set point - rd1 Regulator delta - r1.1 Minimum set point - r2.1 Maximum set point - c1.1 Minimum time between successive switch-ons 180 sec with a compressor, 30 sec with a pump and 10 sec with a solenoid valve A0.1 Differential between alarms AL and AH =2 C, relative to AL.1 or AH.1 AL.1 Low Temperature threshold alarm =10 C, relative to set point St1 AH.1 High Temperature threshold alarm =10 C, relative to set point St1 Ad.1 Delay between temperature alarm and start-up 1,200 seconds /c1.1 Probe calibration - Temperature settings (more than one regulator). The number 2 is added to designate the second regulator. St2 Temperature set point - rd2 Regulator delta - Page 112 / 126 Technical Notice GH/GHO/GAE V1.0 / 02.14

Options 15 Code Description Default value if not specified r1.2 Minimum set point - r2.2 Maximum set point - c1.2 Minimum time between successive switch-ons 180 sec with a compressor, 30 sec with a pump and 10 sec with a solenoid valve A0.2 Differential between alarms AL and AH =2 C, relative to AL.2 or AH.2 AL.2 Low Temperature threshold alarm =10 C, relative to set point St2 AH.2 High Temperature threshold alarm =10 C, relative to set point St2 Ad.2 Delay between temperature alarm and start-up 1,200 seconds /c1.2 Probe calibration - For all additional regulators, the incrementation rule governing the number after the acronym is applied. Ex: St3, rd3, r1.3, r2.3, c1.3, etc. Code Description Output settings O1 Off Delay and On Delay for output 1 O2 Off Delay and On Delay for output 2 O3 Off Delay and On Delay for output 3 O4 Off Delay and On Delay for output 4 Pressure transmitter settings HP HPd LP LPd HPo BPo High Pressure set point High Pressure regulator delta = 4 bar High Pressure set point = 2 bar High Pressure regulator delta = 1.5 bar Pressure transmitter offset for HP Transmitter offset for LP Flow meter settings fst ft fft Flow meter set point Flow meter delay Flow meter on delay Level gauge settings Lt Level gauge delay Technical Notice GH/GHO/GAE V1.0 / 02.14 Page 113 / 126

15 Options 15.1.16.8 Advanced settings: user information The controller has its own self-settings menu, with the various settings entitled "macros": See section 15.1.16.3 'B' key functions on page 107 This subject is covered here to give you an idea of the vocabulary and appearance of these settings when you encounter them in a diagram, for example. The values are factory-set. Example in menu B: screen opposite Fig. 15-22 : Fig. 15-22 : Advanced settings (menu B): Corresponding setting in the controller's self-settings menu: screen opposite Fig. 15-23 : Fig. 15-23 : Advanced settings (controller's self-settings menu) 15.1.16.9 Maintenance No special maintenance procedures. 15.1.16.10 Troubleshooting Look at the display. See section 16.2 Faults on page 118 Page 114 / 126 Technical Notice GH/GHO/GAE V1.0 / 02.14

Options 15 15.1.17 TA valve (X) 15.1.17.1 Description of the option Fitted with a digital indicator to easy and accurate adjustment. Positive stop function to simplify maintenance. (1) Flow direction (2) G ¾ (3) Internal stem (4) Digital indicator 15.1.17.2 Maintenance e.g. to set the valve to position 2.3: (1) Fig. 15-24 : TA valve (2) (3) (4) A. Fully close the valve 0.0 ( Fig. 15-25 : ). 0 0 B. Open the valve to setting position 2.3 ( Fig. 15-26 : ). C. Screw the internal stem (3) clockwise, until it reaches the stop (3 mm Allan key). D. The valve is now pre-set. Fig. 15-25 : Valve closed 0.0 2 3 Fig. 15-26 : Valve in setting position 2.3 To check the pre-set position of the valve, begin by closing the valve (position 0.0). Then open the valve as far as the stop. (position 2,3 see Fig. 15-26 : ). 4 0 15.1.17.3 Troubleshooting To determine the correct size and pre-set value for a valve, use graphs that give the pressure drop for different pre-set values and flow rates for each valve diameter. Fig. 15-27 : Valve open 4.0 Refer to the supplier's documentation for detailed information. Technical Notice GH/GHO/GAE V1.0 / 02.14 Page 115 / 126

15 Options Page left intentionally blank. Page 116 / 126 Technical Notice GH/GHO/GAE V1.0 / 02.14

Troubleshooting 16 Contents of the chapter This chapter contains instructions about troubleshooting your cooler unit. 16.1 Warnings We decline all liability for work carried out on the unit by unqualified staff. Before considering troubleshooting the heat exchanger circuit itself, first confirm the temperature and correct flow rate in the customer's water system. If, after checking and adjusting the temperature regulating system, the problem persists, it may be necessary to check and troubleshoot the heat exchanger unit. Technical Notice GH/GHO/GAE V1.0 / 02.14 Page 117 / 126

16 Troubleshooting 16.2 Faults Before performing any work on the appliance, turn off the electricity power supply. Operating incidents are observed by: the unit stopping (pump(s) not running) abnormal temperature deviations. As soon as an abnormal situation arises, look for the cause of the problem by following the procedures described below. If option Y, the programmable troubleshooting logic controller, is installed: - Look at the display (1). (1) www.marksa.ch Fig. 16-1 : Programmable logic controller Page 118 / 126 Technical Notice GH/GHO/GAE V1.0 / 02.14

Troubleshooting 16 16.2.1 The unit is not operating Look for the cause of the fault: A. Check the power supply to the unit. B. Check that the main switch is in position 1 (starts the unit). C. Check the pump circuit breaker, if fitted (refer to the diagram in the technical file). Accessible by removing the unit's cover. D. Check the power supply to the control circuit (fuse or circuit breaker). E. Check the level of liquid in the tank: The pump will stop if the level is too low; a fault is signalled. After topping up the level, stop and then restart the unit using the switch to clear the fault. F. Check if the pump is running. The motor can be operated by the contact for the electric level sensor (option). A circuit breaker (option) protects the pump from being overloaded. The motor is not running - Check the direction of rotation - Circuit breaker tripped Check the liquid level. Reset the circuit breaker. - Faulty bearings Replace the bearings. - Lack of fluid Add fluid. - Fluid quality out of specification Change the fluid. - Motor not working Replace the motor. The motor turns, without increasing the pressure in the relevant circuit - Pump faulty Replace the pump G. Check the regulation valve. The valve has power but does not operate Check the coil of the solenoid valve or motor of the progressive valve. Technical Notice GH/GHO/GAE V1.0 / 02.14 Page 119 / 126

16 Troubleshooting The thermostat does not operate the valve - Sensor faulty (alarm message Er... on the thermostat display) Replace the sensor - Faulty thermostat Replace the thermostat 16.2.2 High temperature alarm The high temperature alarm indicates faulty operation of the appliance. This information is sent by the appliance to the machine using the cooler unit. An error is sent to the appliance due to overheating. It may be due to: - Loss of flow rate in the heat exchanger. Check for clogging of the water filter. See section 14.2.5 Monthly maintenance on page 86 Little or no circulation in the customer's system. - Temperature of the customer's system too high Check the customer's system. Page 120 / 126 Technical Notice GH/GHO/GAE V1.0 / 02.14

Appendix 17 Contents of the chapter This chapter contains miscellaneous information applicable to the entire range of GH/GHO/GAE water coolers. For specific information about your model, refer to the diagrams and the appended technical file. 17.1 Compliance 17.1.1 Directives Your cooler unit complies with directive 2006/42/EC from the European Parliament and Council dated 17 May 2006 regarding the approximation of legislation in Member States relating to machines. For more details, refer to the declaration of compliance included in the technical file. 17.1.2 Identification plate An identification plate is attached to the cooler unit. It contains important information about the date of manufacture, serial number, refrigerant gas, weight and power. GH ART: Fig. 17-1 : Identification plate Please copy the information on the identification plate for the appliance into the boxes below: Model Serial number (SN) Technical Notice GH/GHO/GAE V1.0 / 02.14 Page 121 / 126

17 Appendix 17.2 Discarding the product 17.2.1 General remarks In order to protect people and the environment, all appliances and their accessories must be scrapped following strict rules. Legislation and local regulations relating to discarding waste must be followed. An appliance may only be dismantled by a qualified technician. Parts and sub-assemblies removed by the technician may not be re-used, unless the planned re-use has been approved by the manufacturer in writing. Any future application must be described precisely in the request. 17.2.2 Preparation A. Completely drain the hydraulic circuit into a clearly identified, sealed container. B. Other components of the unit may also be recycled: copper or stainless steel from the heat exchanger, steel sheet, copper electric cables. Page 122 / 126 Technical Notice GH/GHO/GAE V1.0 / 02.14

Appendix 17 17.3 Maintenance sheet The original blank maintenance sheet must be kept with this manual. When a maintenance report is required, make a copy and complete it. Maintenance / Event / Fault Action Operator Date 126 Technical Notice GH/GHO/GAE V1.0 / 02.14 Page 123 / 126

17 Appendix 17.4 Certificate of conformance Page 124 / 126 Technical Notice GH/GHO/GAE V1.0 / 02.14

Appendix 17 Technical Notice GH/GHO/GAE V1.0 / 02.14 Page 125 / 126 126