Güntner NLA 2/69 Table of Contents 1. Warranty Statement 5 2. Important basic information Safety instruction Observing operation instruc

Transcription

1 TRANSPORTATION, RIGGING, INSTALLATION, OPERATION & MAINTENANCE MANUAL MANP.3 Industrial Evaporator Series Description: Industrial Product Cooler Series: MANP Rev. 0

2 Güntner NLA 2/69 Table of Contents 1. Warranty Statement 5 2. Important basic information Safety instruction Observing operation instruction Legal notes Operation instruction Scope Set-up and other applicable documents Standards Representation standards List of abbreviations Standards for safety signs and notices General safety sign and their meaning in this operation instructions Warning signs and their meaning in this operation instructions Prohibition sign and their meaning in this operation instruction Mandatory sign and their meaning in this operation instruction Safety Labelling on the unit Safety sign on the unit Other sign and notes on the unit Basic safety notices How to act in an emergency Personnel, care requirements Proper intended use Proper intended use Operation conditions Improper use Mechanical residual hazards Fins, sharp unit corners and edges Fans Electrical residual hazards Thermal residual hazards Danger of burns Frostbite hazards Residual hazards with ammonia (NH3) Residual hazards caused by vibrations 21

3 Güntner NLA 3/ Residual hazards caused by pressurized parts Residual hazards caused by defective installation Residual hazards with break during operation Residual hazards caused by loose components or liquids Residual hazards with disposal Technical data Unit Motors Nomenclature Dimensions Set-up and function Fan motor Transportation, rigging and storage Safety Transportation, rigging and storage Storage before installation Set-up and start up Safety Safety instruction for set-up and start up System side safety requirements Customer side safety requirements Requirements at the installation location Unpacking the unit Installation System side requirements for stress-free installation Mounting the unit Notes on connecting the unit Connecting the drain line to the drain pan Connect the unit to the system Unit electrical connections and protection Perform acceptable test Test readiness for operation Putting the unit into operation for first time Operation Safety Putting the unit into operation Taking the unit out of operation 52

4 Güntner NLA 4/ Shutting down the unit Putting the unit into operation after shutdown Changing the unit over to another refrigerant Troubleshooting Safety Service Troubleshooting table Dealing with faults Maintenance Safety Before starting all maintenance With all maintenance work After all maintenance work Inspection and maintenance plan Fans Unit heat exchanger Care and maintenance plan Maintenance work Remove leaks Clean units General Clean heat exchanger Cleaning with compressed air Hydraulic cleaning Cleaning with brushes or brushed with compressed air Cleaning fans Defrosting the unit Notes on defrosting Defrost control Spare parts 68

5 Güntner NLA 5/69 1. Warranty Statement The supplier warrants against defects in workmanship and materials of the product supplied for a period of 24 months from the time of transfer of risk, provided that they are correctly installed and operated within the recommended limits of the manufacturer s technical documentation. The supplier at its option shall repair, or replace, free of charge to the purchaser all goods which become defective during the warranty period as a result of defects in design, workmanship or materials, fair wear and tear excluded, provided, however, that; - the application is correct - operating and installation instructions are complied with - system component and piping design is in accordance with good refrigeration practice - Nitrogen or an inert gas must be introduced into the piping during the brazing of the piping installation In order to execute the corrective work or replacement supply that appears necessary, within the supplier s reasonable discretion, the purchaser must, following communication with the supplier, provide the necessary time and opportunity, or the supplier will be freed from the liability of the defect. The costs arising directly from the corrective work or replacement supply, transport and exchange costs in particular, shall be borne by the purchaser himself. The supplier shall not be liable for costs incurred in dismantling or fitting replacement parts or for any independent inspection undertaken by the purchaser. The purchaser shall return any allegedly defective goods, carriage paid, to the supplier s works. Upon receipt of the goods and inspection thereof the supplier shall repair or replace, at the supplier s discretion, the defective goods and return freight, carriage paid, and without any further expenses. This shall constitute full compliance of the supplier s obligations. No liability is accepted for the consequences of modifications or repair work being carried out by the purchaser or a third party incorrectly or without the prior permission of the supplier. It is clearly understood and agreed that any further claims, in particular claims for compensation for damage and consequential damages not occurring on the supplied item itself, are excluded. Furthermore the supplier shall not be liable to the purchaser, or client of the purchaser, for any direct or indirect damages, injury to persons or property or any consequential loss or loss of profits arising from defective goods or workmanship or from any other cause whatsoever. To obtain warranty service, please contact: Or, (for within the USA) quality@guentner.com.mx sales@guntnerus.com

6 Güntner NLA 6/69 2. Important basic information 2.1 Safety instruction Observing operation instruction CAUTION Always keep the operating instructions in the unit's immediate vicinity at all times. Ensure that the operating instructions are accessible to all people that have anything at all to do with the unit at all time. Ensure that the operating instructions are read and understood by all people that have anything at all to do with the unit. 2.2 Legal notes Warranty claim expires as follows: With faults and damages that can be attributed to non-compliance with the specifications of these operating instructions. With complaints that can be attributed to use of spare parts other than the original spare parts specified in the submittal offer documents. With changes to the unit (refrigerant, version, function, and operating parameters) namely the orderrelated information specified in the submittal documents without the manufacturer's prior consent. The operating instructions may not be reproduced electronically or mechanically, circulated, changed passed on to third parties, translated or used otherwise, in full or in part, without Güntner s prior explicit written approval. 2.3 Operation instruction Scope These operation instruction apply for all NH3 evaporators of the MANP.3 series NOTICE You will find the unit model and nomenclature in the attached submittal documents Set-up and other applicable documents The unit's operating instructions include the following parts: This Installation & Operating Manual Submittal offer documents

7 Güntner NLA 7/69 Submittal documents Submittal drawing/s, complete with technical data Electrical wiring diagram in terminal boxes These operating instructions are part of the operating instructions manual of the system, provided by the system's installer. 2.4 Standards Representation standards The following text markups are used in these operating instructions: Bold Colored triangle Requires special attention Instructions List of abbreviations Abbreviations Meaning NH3 Ammonia refrigerant ISO International Standardization Organization Emergency STOP Emergency lock out switch C Degrees Celsius F Degrees Fahrenheit Bar Unit of pressure (1,01972 kgf/cm 2 ) = 14, psi Psi Unit of pressure lb/in 2 L Liter (liquid volume) ft 3 ft 3 Cubic foot (liquid volume) Vol % Volume percent (concentration level relative to a volume) IP Index of protection for electrical motors ppm Parts per million, concentration figure, stands of millionth Hz Hertz (frequency) 3~ 3 phase alternating current 1~ Single phase alternating current NEC National Electrical Code (NAFPA 70) NEMA National Electrical Motor Association NRTL Nationally Recognized Testing Laboratories EPC Electric Power Company ASME American Society of Mechanical Engineers ASTM American Society for Testing Materials 2.5 Standards for safety signs and notices General safety signs and their meaning in this operating instruction DANGER Dangerous situation that will definitely cause serious injury and / or death if not avoided

8 Güntner NLA 8/69 Dangerous situation that could cause serious injury or death if not avoided CAUTION Dangerous situation that t could cause slight to moderate injury if not avoided Refers you to possible damage to property NOTICE Warning signs and their meaning in this operation instruction Warns against hand injuries Hands or fingers can be crushed, pulled in or otherwise injured with non-compliance Warns against hot surfaces If the temperature is over 113 F (45 C) burns can occur Warns against cold If the temperature is below 32 F (0 C) frostbite can occur Warns against presence of electrical equipment Danger of an electric shock if electrical components are touched Warns against potentially explosive substances Use of ignition sources can cause explosions Warns against flammable substances Use of ignition sources can cause fire

9 Güntner NLA 9/69 Warns against corrosive substances Contact with corrosive substances can cause injuries, especially with the eyes Warns against harm to health Contact with or inhaling harmful to health, or irritant substances can cause injuries or damage the health Warns against toxic substances Contact with or inhaling toxic substances can cause injuries or damage the health Prohibition signs and their meaning in these operation instructions Flames / flammable substances prohibited Ignition sources must be prevented and ignition sources are not not allowed Smoking prohibited Smoking is forbidden

10 Güntner NLA 10/ Mandatory signs and their meaning in these operation instructions Eye protection required Eye protection: Use protective cover, protective glasses or face protection. Hand protection required Protective gloves must be used to protect against mechanical and chemical dangers (see imprinted pictograms). Respiratory protection required Breathing apparatus must be suitable for the refrigerant used. Breathing apparatus must consist of: At least two independent breathing devices (self-contained breathing apparatus) For ammonia: an additional breathing apparatus with filter (full mask) or an independent breathing apparatus (self-contained) Protective clothing required Personal protective clothing must be suitable for the refrigerant used and for low temperatures, and must have good heat insulation properties. Lock out required (Lock out Procedure) De-activate the electrical system and secure against being switched on while undertaking maintenance and / or repair work.

11 Güntner NLA 11/69 3. Safety 3.1 Labelling on the unit: Position of labels on the unit Safety sign on the unit: 4. Holding charge during transportation to be released at Schrader valve

12 Güntner NLA 12/69 6. Electric shock hazard Other signs and notices on the unit 1. Unit Nameplate

13 Güntner NLA 13/69 2. Guntner logo Fan Rotation Art. Code Fan rotation 5. Refrigerant connections

14 Güntner NLA 14/69 7. Electrical grounding point 3.2 Basic safety notices How to act in an emergency Danger of injuries and damage to property The unit contains ammonia as a refrigerant (NH3). Ammonia is potentially explosive and can be b flammable lammable.. Unintentionally carried in oil residues and unintentionally carried in refrigerant ammonia can ignite. An explosion can cause serious injuries and damages to property. Ammonia is a corrosive, toxic irritant gas. Prolonged exposure to ammonia concentrations of 0.2% volume, and greater, in the surrounding air can be life-threatening or fatal. Safety measures and procedure: With unexpected serious refrigerant releases,, leave the machine room immediately and activate the emergency STOP switch s set up in a safe place, e.g. with: Visibly leaking ammonia liquid or vapor from the heat exchanger or piping components. Sudden large release (release and evaporation of the greater part of the entire refrigerant charge in a short time, e.g. in less than 5 minutes). Sudden strong smell; very irritating; immediate irritation of the eyes, nose and nasal passages. Activate NH3 alarm device (NH3 concentration > 200 ppm): Have experienced, trained personnel with prescribed protective clothing perform all necessary protective and other measures: Use respiratory protection. Use a room air-independent independent breathing apparatus with maintenance work in high ammonia concentrations in the room air. Ensure the machine room is well ventilated. Divert released refrigerant liquid and vapor in accordance with OSHA requirements.

15 Güntner NLA 15/ Personnel, care requirements Instructions for dealing with injuries: Call an emergency doctor immediately Liquid ammonia can cause frostbite or severe irritation to the skin and / or eyes. The injured person must keep a breathing apparatus on until further notice to prevent inhalation of vapors from ammonia contaminated clothing. Shower the injured person for five to fifteen minutes with water. Remove the clothing carefully ly during the shower. If ammonia nia- contaminated clothing is removed without wetting with water first, the injury can worsen, as firmly frozen skin may be torn away. Showering should be with warm water as much as possible to prevent a temperature shock. If available, use an emergency shower; otherwise use a water hose. CAUTION The unit must only be put into operation, operated, maintained and repaired by trained, experienced and qualified personnel. People that are responsible for the operation, maintenance, repair and evaluation of systems and their components must have the required training and specialist knowledge for their work. Qualified or expert means the ability to satisfactorily perform the activities required for the operation, maintenance, repair and evaluation of refrigeration systems and their components. The unit may be operated by operating personnel that have no specific knowledge of refrigeration engineering, but have sufficient knowledge and experience with regard to the mode of operation, and daily monitoring of this system. These operating personnel may not make any adjustments to settings on the system. Changes to the unit, which the manufacturer has first agreed to in writing, may only be made by instructed and qualified personnel. Electrical installation: Attention: Only qualified personnel familiar with AC motors and associated machinery should plan or implement the installation, start-up and subsequent maintenance of the system. Failure to comply may result in personnel injury and/or equipment damage. 3.3 Proper intended use Proper intended use NH3 evaporators of the MANP.3 series are intended for installation and use in a refrigeration system and are used for cooling and circulating of the air in large refrigerated facilities. The unit is delivered for operation with a specific operational condition: Evaporation temperature Refrigerant feed type, and rate thereof where applicable Airflow volume Air inlet temperature Relative air humidity. The specified operating condition is provided in the submittal documents.

16 Güntner NLA 16/ Operating conditions The unit is a component of a refrigeration system including its refrigerant circuit. The purpose of these operating instructions, as part of the system operating instructions manual (of which these operating instructions are a part), is to restrict the dangers to people and property and the environment from the unit and the refrigerant used in it to a minimum. These dangers are essentially connected with the physical and chemical properties of the refrigerant and with the pressures and temperatures that occur in the refrigerant-carrying components of the unit (see Residual hazards with ammonia (NH3), page 19). Danger of injuries and damage to property The unit must only be used in accordance with the proper intended use. The operator must ensure that when operating, monitoring and maintaining the unit, the refrigerant does not deviate from the submittal information specified in the order-specific offer documents. The operator must ensure that maintenance measures are performed in compliance with the system's operating instructions manual. Charging the unit is only permitted following written approval by the manufacturer. You will find the order related proper use as intended in the submittal documents. Do not exceed the maximum operating pressure stated on the unit name plate Improper use Danger of injuries and damage to property Refrigerants and their combinations with water or other substances in the refrigerant components have chemical and physical effects from the inside on the materials surrounding them. The unit must only be charged with NH3. Charging the unit with another refrigerant results in, structural and welding materials used may not withstand the foreseeable mechanical, thermal and chemical stresses, and the pressure that can occur during operation, and when shut down. material, wall thickness, tensile strength, corrosive resistance, shaping s process and testing are not suitable for the refrigerant used and may not withstand the possible pressures and stresses that might occur. the unit not being resistant to other refrigerants. the unit not remaining leak tight during operation and when shut down. a possible sudden release of refrigerant could directly endanger people and/or property and the environment. The maximum permissible operating pressure specified on the name plate must not be exceeded! If the operating pressure is exceeded, ed, the structural and welding materials may not withstand the foreseeable mechanical, thermal and chemical stresses and the pressure that can occur during operation, and when shut down. the unit may not remain leak tight during operation and when shut t down. there may be a possible refrigerant release after a rupture or leakage on refrigerant-carrying components, which would result in the following dangers: Danger of components rupturing Danger of poisoning

17 Güntner NLA 17/69 Fire hazard Explosion hazard Chemical burn hazard Frostbite hazard (caused by liquid refrigerant) Suffocation hazard Hazards caused by panic reactions Environmental pollution The NH3 evaporator must not be used, where it is possible that t short or prolonged effect caused by contact, inhalation or ingestion of the refrigerant NH3 might result in harmful hazards. where it is possible that the lowest concentrations of the NH3 refrigerant in a homogeneous mixture with air could ignite. where the possibility exists of a sudden large release (release and evaporation) of the greater part of the entire charge in a short time (e.g. in less than 5 minutes). The unit must not be changed without prior written consent by Güntner. Changes to the unit are: changing the operating point changing the fan capacity (motor( HP, ESP or air volume) changing the refrigerant feed and / or recirculation rate changing to another refrigerant The unit must not be operated if safety devices recommended by the manufacturer are not available, not properly installed or not fully functional. The unit must not be operated if it is damaged or demonstrates faults. All damages and faults must be reported to Güntner immediately and must be removed immediately. Work on the unit must not be performed without the personal protective equipment specified in these operating instructions. 3.4 Mechanical residual hazards Fins, sharp unit corners and edges Warns against hand injuries Danger of cuts on hands and fingers from the fins and sharp corners and edges of the unit. Use reliable hand protection

18 Güntner NLA 18/ Fans Warns against hand injuries i There is a danger of fingers being cut c off from rotating fan blades, injury hazard for the hands and danger of being pulled into the equipment from loose elements such as hair, necklaces or clothing parts. Do not operate fans without fan guard/s /s.. Pinch/trap point hazard With automatic fan start during maintenance work there is a danger of pinching / trapping to limbs and / or fingers. Lock out procedure required before you begin maintenance work in which you must remove the fan guard. Secure the unit against unintentional switching on again by removing the electric fuses for the unit. Secure the unit with a suitable warning sign referring to unintentional switching on. Ensure correct LOCK OUT Procedure 3.5 Electrical residual hazards Warns against the presence of electrical equipment Direct and indirect contact with voltage-carrying parts of motors and electrical switchgear can cause serious injuries or death. Lock out procedure required before you begin maintenance work. See the refrigeration eration system's system documentation for this. Secure the unit against unintentional switching on again by removing the electric fuses for the unit. Secure the unit with a suitable warning sign referring to unintentional switching on. Please note that the mains cables may also be carrying voltage, even if the unit is powered off. Work on electrical equipment must only be performed by people that have the required expertise (e.g. an electrician or an electro- technically instructed person) and who are authorized to do so by the operator.

19 Güntner NLA 19/ Thermal residual hazards Danger of burns Warns against hot surfaces During defrosting of the heat exchanger coil (heat exchanger) the tubes (hot gas defrosting) and / or electric heater elements can have temperatures in excess 212 F (100( C).. Contact can cause burns. Hand protection required Frostbite hazards Warns against cold In refrigeration operation on the heat exchanger and pipes have a temperature below 32 F (0 ( C).. Contact can cause frostbite. Hand protection required 3.7 Residual hazards with ammonia (NH3) Danger of injuries and damage to property with ammonia as refrigerant The unit is operated with ammonia (NH3) ) as a refrigerant. Refrigerant can cause the following hazard situations and injuries:

20 Güntner NLA 20/69 Explosion hazard, Fire hazard Ammonia is a flammable, explosive gas. The fire and explosion hazard is low because of the high ignition temperature, small ignition range, and low explosiveness potential and high affinity with air humidity. Leaks in the unit can cause the NH3 refrigerant to escape into the working area. Direct and indirect ignition ition sources can cause the refrigerant NH3 to burn and explode. Do not store potentially explosive and flammable substances in the machine room Test the tightness of the unit regularly, as specified in these operating instructions. Provide firefighting equipment in sufficient numbers in the unit's machine area. Observe the details for fire fighting in the NH3 refrigerant safety data sheet. Chemical burn hazard Leaks in the unit can cause the NH3 refrigerant to escape into the working area. NH3 refrigerant is corrosive in combination with humidity. Contact with the skin, mucous membranes and the eyes with the NH3 refrigerant can cause chemical burns to the skin, mucous membranes and the eyes. If the NH3 refrigerant gets into the eyes, the eyes can no longer be kept open because of a strong burning sensation,, and orientation can be lost. Test the tightness of the unit regularly, as specified in these operating instructions. Danger of poisoning Leaks in the unit can cause the NH3 refrigerant to escape into the working area. Ammonia is a toxic irritant gas. Inhaled NH3 refrigerant causes agitation, dizziness, vomiting and cramps; with heavy concentrations suffocation and life threatening pulmonary edema. Panic sets in. Ammonia concentrations of 0.20 Vol V % in the ambient air or a prolong longed duration in the ammonia-containing ambient air can be life-threatening or fatal. Test the tightness of the unit regularly, as specified in these operating instructions. Ensure that the maximum permissible limit t values in the working area are not exceeded. Monitor the ammonia concentration in the ambient air with detectors and alarm devices. Frostbite hazard Leaks in the unit can cause the NH3 refrigerant to escape into the working area. Liquid NH3 refrigerant erant can have a temperature of 27 F (-33( C). Contact with the skin and eyes with liquid refrigerant can cause frostbite to the skin and damage to eyes. Test the tightness of the unit regularly, as specified in these

21 Güntner NLA 21/69 operating instructions. Danger of injury, damage to property or the environment with ammonia-water combinations If water comes into contact with liquid ammonia, this can result in severe s evaporation and liquid ammonia splashing about. Never spray water on liquid id ammonia Do not use water in the machine room to contain ammonia Ensure that ammonia-water (ammonia solution) never enters water systems or sewage 3.8 Residual hazards caused by vibrations Danger of injuries and damage to property caused by loose components If fans are damaged during fan operation, segments of the fan blades can severely injure people and / or cause damage to property close to the fan. Fans, components and cables in the system, stem, must be designed, constructed and integrated so that dangers caused by vibrations that these, or other parts of the system generate are reduced to an absolute minimum, while incorporating all available means for reducing vibrations, preferably at the source. NOTICE Damage to property caused by vibrations Vibrations that are increased by imbalances, as created by dirt, icing or fan blade damage, are possible during operation. The vibrations are transferred to the unit, where they can cause damage and damage the unit mounting or components connected to the unit. Check the fan blades and fan guard/s regularly for dirt and frosting and/or icing and the fans' smooth operation (see Fans, page 60) Residual hazards caused by pressurized parts Injury and damage to property caused by pressurized parts that t contain ammonia refrigerant Breaks in pressurized pipes or pressurized components of the unit can cause injuries or damage to property caused by refrigerant releases.. A sudden large release of the refrigerant with its hazardous properties after a break or leak on pressurized components of the unit can cause the following hazards: Flammability Explosion hazard Chemical burns Frostbite (caused by liquid refrigerant squirting/splashing) Suffocation Panic,

22 Güntner NLA 22/69 Environmental pollution Ensure that the unit in question is pressure-free before maintenance work begins or remove the t refrigerant from the unit in question. Only perform maintenance work especially welding work on the unit in question after completely removing the refrigerant from the unit Residual hazards caused by defective installation Injuries and damage to property caused c by defective installation Defective installation results in hazards caused by: Break or leak in liquid-carrying unit components and pipes Absence of relief devices to prevent liquid escape: Observe the solenoid valve/check valve sequence combination in the liquid line: In the flow direction the solenoid valve must be installed first and then the check valve. If the sequence is reversed, liquid will be locked in between the check valve and the solenoid valve when the solenoid valve is closed; this will heat up during shutdown state and can cause pipes or connection flanges to break when it expands. This applies in particular to lines carrying cold liquids. Sub-cooled liquid in sections of system: : If sections of a system are opened due to repairs and the pressure is balanced with the atmosphere, there is a danger that liquid, sub-cooled ammonia will still be in the opened area. Ammonia has a very high evaporation heat, so the heat penetration in the pipes is not sufficient to evaporate the liquid ammonia quickly especially if this is an insulated line. Taking the refrigerant pumps out of service: When switching over from a duty pump to a stand-by pump: If the duty pump is shut off at both ends from the previous operating state, liquid, cold refrigerant remains in the pump. In shutdown state the refrigerant heats up in the pump and causes leaks with housing or flange cracks. Uneven load distribution on the fixtures with the danger of stresses within the unit or unit displacement (breaks or leaks on fluid-carrying components of the unit and pipes; danger of breaking off). Insufficient bracing / support of refrigerant-carrying lines against mechanical damage On-site connections: loaded installation; effect of forces on the distribution and header pipes with the danger of breaks or leaks on refrigerant-carrying components of the unit and pipes. Breaking and falling danger of the unit with hazard of escaping refrigerant and exposed electrical cables. Danger of damage caused by environment - conditional hazard sources (production, transport and other processes in the working area). Unit functional faults caused by air entering and / or leaving obstructions. ons. Obstructed electric heater elements change-out with electric defrosting (accessory at customer's request). Obstruction of complete inspection, checks and maintenance, i.e. no unobstructed accessibility to the refrigerant and / or electrical components, connections and cables, no recognizable identifiers on the pipes and insufficient space for tests. Ensure that: The units are to be installed on the mounting points corresponding with their weights and tightened with fixing bolts. The operator or installer is responsible for ensuring that the bolted connections are of an adequate strength. The diameters of the mounting holes have been statically determined by the manufacturer and the fixing bolts are adapted accordingly. The fixing bolts are secured s against loosening by means of an appropriate locking device. The fixing bolts are not over tightened or stripped. All fixing bolts are tightened equally to achieve a load distribution on the connections that is as balanced as possible.

23 Güntner NLA 23/69 All mounting points maintain the same spacing to the finished level permanently and under load, so that no mechanical stress occurs to the unit structure. The units are anchored in their mounting position in order to prevent the equipment from moving. The functional safety of the fixing bolts is tested as part of the maintenance periods. See Maintenance, page 57. The unit is mounted and set up so that it is not damaged by environment-conditional hazard sources (production, transport and other processes at the set-up point) or it s s functioning is not disturbed by the interventions of unauthorized persons. The units are mounted and set up with sufficient inclination for condensate water flow. The units are mounted and set up so that unobstructed air inlet/outlet is constantly available without any air short circuiting. The units are mounted and set up so that unobstructed electric heater rod change-out with electric defrosting is constantly available (option: accessory at customer's request). The units are mounted so that they can be inspected, checked and maintained from all sides at all times, i.e. there must be unobstructed access to the refrigerant-carrying and electrical components, connections and lines, the pipeline labeling must be identifiable and adequate space must be available for testing. The refrigerant-carrying lines are protected against mechanical damage. On-site connections: when installing keep the unit free of load; force must not be exerted on the distribution and header pipes. The following f must be observed without fail when installing the unit: Imperative adherence to spacing from objects that could be endangered by an explosion or the toxic effect of NH3. Provision of measures to safeguard protective objects from an NH3 concentration of more than 200 ppm. Flammable materials must not be placed below the unit. Set up and mount units as follows: In areas that are used for inner-plant traffic, the pipelines to and from the unit must only be installed with connections and fittings ings that cannot be removed. Relief devices to prevent liquid releases must be provided and available. Sub-cooled liquid must only be present in a minimal amount in system sections in shutdown state. That when switching over from a duty pump to a stand nd-by pump no liquid refrigerant remains in the pump Residual hazards with break during operation Injuries and damage to property caused c by break during operation Residual hazards with break during operation (see( Residual hazards caused by defective installation, page 22), Non-compliance with maximum permissible operating pressure (see ( Operating conditions, page 16), 1 Disregarding pressurized line sections with maintenance (see ( Residual hazards caused by pressurized parts, page 21). 2 Disregarding residual hazards caused by vibration (see ( Residual hazards caused by vibrations, page 21) 2 result in ruptures during operation and maintenance. This results in dangers caused by Loose components (see Residual hazards caused by pressurized parts, page 21). 2 Refrigerant releases (see Residual hazards with ammonia (NH3), page 19). Ensure that: The installation is fault-free. free. The maximum permissible operating pressure is always adhered to. Pressurized line sections are de-pressurized before any and all maintenance and repair work. Vibrations from the refrigeration system (vibrations caused by refrigeration system compressors, components and lines) and from the impeller (imbalances caused by frosting, icing or dirt build-up up or damages) are reduced with all available means and maintained at an absolute minimum. Relief devices to prevent liquid escapes are provided and available.

24 Güntner NLA 24/69 Sub-cooled liquid is only present in the minimal areas of the system in shutdown state. When switching over from a duty pump to a stand-by pump no liquid refrigerant remains in the pump Residual hazards caused by loose components or liquids Injuries and damage to property caused c by loose components or liquids Residual hazards caused by loose components and liquids (see( Residual hazards with break during operation, page 23) Residual hazards with disposal Danger of injuries and damage to property caused by refrigerant,, ammonia NH3 The following notes are recommendations for the proper professional disposal of the unit. Applicable waste disposal laws are binding for the country of operation: Disposal must only be carried out by experts. All unit components, e.g. refrigerants,, refrigerant oil, heat exchangers, fans must be disposed of properly as specified. Used refrigerant that is not determined for re-use, must be treated as waste and safely disposed of. There must be no emissions into the environment. The NH3 refrigerant must be transferred into a refrigerant container in compliance with the respective safety measures. This refrigerant vessel must be suitable for the NH3 refrigerant. It must be easy to identify and labeled for the refrigerant, e.g. "NH3 (ammonia) recovered". A disposable single-use container must not be used, as refrigerant vapor residues in the container escape during disposal. The refrigerant container must not be overfilled. The maximum permissible pressure of the container must not be exceeded during the removal process. The refrigerant must not be filled in a liquid container that contains another or an unknown refrigerant. This other or unknown refrigerant must not be released into the atmosphere, but rather identified, treated again, or properly disposed of as specified. An officially authorized facility can be used for destroying the refrigerant. Used refrigerant oil that has been recovered from the unit and cannot be treated again, must be kept in a separate, suitable container, treated as waste and safely disposed of. It must be ensured that all unit components containing refrigerants s and refrigerant oils,, are disposed of properly as specified. The unit consists predominantly of the basic materials stainless steel, aluminum,, coated steel (tube and tube coil (heat exchanger) and casing), steel, aluminum,, copper, polyamide (motors), stainless steel, copper, insulating material, (heater rods for electrical defrost; option; accessory available on request). These materials can be handled by the waste industry, including in paint-treated treated state, to recycling via mechanical and thermal separation. Before scrapping the refrigerant-carrying unit components must be drained, whereby the pressure must be reduced to at least 8.7 psi (0.6( bar) absolute for a unit pipe volume up to and including 7.0 ft 3 (200 l), l and to 4.3 psi (0.3( bar) absolute for a unit t pipe volume over 7.0 ft 3 (200 l). l. The pressure reduction process is then ended when the pressure no longer increases and remains constant, and the unit is at ambient temperature. Danger of environmental pollution

25 Güntner NLA 25/69 The ammonia (NH3) ) refrigerant is classified according to ASHRAE in group B2 (refrigerant of low flammability and higher toxicity). Released ammonia can enter the environment in a wind-born manner.. Ammonia is lighter than air and rises quickly. It is diluted with the air to harmless concentrations. But even if the concentration is harmless, the ammonia smell is still irritating. Ammonia's classification as "toxic" means that people in the area can be affected. Ensure that no refrigerant enters water systems or sewage. With serious ammonia releases into the waste water system, for example when ammonia vapor is broken down by water: immediately report the incident to the responsible office for the local waste water system. Operate the facility for recovering or disposing of refrigerants s so that the danger of a refrigerant or refrigerant oil emission into the environment is kept to a minimum. Güntner transportation packaging is made from environmentally compatible material and is suitable for recycling.

26 Güntner NLA 26/69 4. Technical data 4.1 Unit NOTICE The fans' capacity values depend on the ambient temperature and on the external pressure at the working point. Güntner recommends electric fan ring heating to be used in low temperature applications. Please consult the manufacturer when operating the unit below -40 F (-40 C ( 40 C) because of the special material requirements and selection. All electrical parts must be installed in accordance with National Codes and standards (NEC) and local codes outlining ing the provisions for compliant electrical equipment installations.. Installation must comply with specifications regarding wire types, conductor sizes, branch circuit protection and disconnect devices. Failure to do so may result in personal injury and/or equipment damage. Project number See order submittal documents unit name plate Unit name See order submittal documents unit name plate Manufacturer number See order submittal documents unit name plate Production year See order submittal documents unit name plate Refrigerant R717 (ammonia, NH3) Volume See order submittal documents Permissible operation pressure psi (32.0 bar) Test pressure psi (35.2 bar) Permissible operating temperature -76 F F (-60 C C) Permissible ambient temperature -40 F F (-40 C C) Permissible air humidity 100 % Test date See order related order documents Test medium Dry air Weight See order submittal documents 4.2 Motors Fan type Protection rating Current type Voltage Permissible air temperature Protective device See order submittal documents Insulation class F, TEFC 3 ~ rotating current 460V/3~/60Hz 230V/3~/60Hz 400V/3~/60Hz 400V/3~/50Hz Usage range -40 F to +104 F (-40 C to +40 C) Automatic Thermal Overload protection (optional)

27 Güntner NLA 27/ Nomenclature MANP F /1 6 -A 0 L L 0 /24P.M MANP : Mexico Ammonia N fin pattern Product cooler 2. Fan diameter : 105 means 42 impeller diameter and 125 means 48 impeller diameter 3. Version :.3 4. Rows in air direction: D means 4 rows F means 6 rows H means 8 rows J means 10 rows K means 12 rows 5. Total quantity of unit s fans 6. Fin spacing : 6 means 4.2 fins per inch 8 means 3.2 fins per inch 10 means 2.5 fins per inch 12 means 2.1 fins per inch 7. Defrost type : A means air defrost and H means hot gas defrost 8. Identification character : 0 means standard unit (0 ESP) 4 means 1/4 in H2O of ESP 2 means ½ in H2O of ESP 9. Motor HP : E means 1 ½ HP fan motor F means 2 HP fan motor G means 3 HP fan motor J means 5 HP fan motor L means 7 ½ HP fan motor M means 10 HP fan motor 10. Motor voltage : L means 460V/3~/60Hz O means 230V/3~/60Hz J means 400V/3~/60Hz T means 400V/3~/50Hz (request as special) H means 575V/3~/60Hz (request as special) 11. Air discharge angle: 0 means 0 (horizontal discharge) 4 means 45 down blow 9 means 90 down blow 12. Number of passes

28 Güntner NLA 28/ Manufacturing location :.M means manufactured in Mexico 4.4 Dimensions ions Standard units (0 discharge) M B1 B H H H H L2 L L1 L2 L1 L1 L L2 L1 L1 L1 L L2 L1 L1 L1 L1 L

29 Güntner NLA 29/69 45 down blow

30 30/69 M H Güntner NLA WL L1 L2 B1 B H L WL L1 L2 L1 H L L2 WL L1 L1 L1 H L L2 WL L1 L1 L1 L L1

31 Güntner NLA 31/69

32 Güntner NLA 32/69 90 down blow WL L2 L1 L1 L L2 L1 L1 L1 L H H H M H L2 WL L1 L WB B B1 WL WL L2 L1 L1 L1 L1 L

33 Güntner NLA 33/69

34 Güntner NLA 34/69 5. Set-up and function The evaporator consists of, a heat exchanger arranged as consisting of pipe coils fitted with fins /(stainless steel pipe; aluminum fin) and header pipes (stainless steel)/ and pipe connections to the piping system. a casing, galvanized steel, powder-coated, easy access to connections. a thermally-decoupled condensate drain pan made of AlMg3, powder-coated. The drain pan is hinged and removable for easier cleaning. The evaporator is a refrigeration system component. It provides a finned heat exchanger (straight and U- bend sections pipe coils with fins, which are connected to form a heat exchanger), in which liquid refrigerant evaporates with heat absorption from the fluid (air) being cooled. The refrigeration system is a combination of refrigerant-carrying components and fittings connected to one another, which form a closed circuit, in which the refrigerant circulates. The refrigerant absorbs heat at a low temperature and low pressure and evaporates (evaporator- side), and at a higher temperature and higher pressure gives off the heat again and condenses itself (condenser-side). The heat from the fluid being cooled is dissipated with fans over the entire surface of the evaporator. Güntner NH3 evaporators work in accordance with the principle of flooded evaporation, i.e. the refrigerant liquid, which is routed to the evaporator, is approx. 2-5 times that of the refrigerant volume that would be required for complete evaporation. The refrigerant is routed to the NH3 evaporator either via pumps (pump-forced circulation) or with gravity (thermosyphon effect). A liquid separator separates the liquid-vapor mixture of the refrigerant so that only the pure refrigerant vapor reaches the compressor. The liquid separator also ensures that only liquid refrigerant is fed safely to the evaporator.

35 Güntner NLA 35/69 6. Fan motor NOTICE During longer storage or downtime periods, the fans must be operated for 2 to 4 hours each month. NOTICE In the case of motors with condensate holes, any sealed (plugged) condensate drain holes must be opened at least every six months. Motors with PTC resistors require an additional trigger device for the installed thermistors. Lock out is recommended to prevent reactivation. Max. 2.5 V test voltage or current-limited meters may be used on thermistors. When using two speed motors, the corresponding time delays must be taken into consideration for motors with 2 speeds. For motors with direct start and a HP value > 7.5 HP, a startup current limitation (soft start using thyristor) may be necessary.

36 Güntner NLA 36/69 7. Transportation ransportation,, rigging and storage 7.1 Safety Crushing danger from falling objects The MANP.3 unit s empty weight is between 1,224 lb (55( kg) and 10,104 lb (4583kg kg).. It can slip and fall off the means of transport, causing serious injuries or death. Heavy impacts or vibrations can damage the unit. Observe the instructions on the transport labels on the packed units. Ensure that the assigned staff is trained for proper unloading and rigging. Use a transporting device appropriate for the unit's weight (see Transportation and storage, page 36). You will find the weight of the packed unit in the submittal documents. Ensure that nobody is under the unit or near the loading area during the rigging. Ensure even en distribution of unit weight for rigging.. Observe that the bulk of the unit weight is always on the fan side. Observe the instructions on the transport labels on the packed units (see ( Other signs and notes on the unit, page 12). 1 Secure the unit against slipping and mechanical damage. When rigging by crane: The hooks and lifting gear of the load lifting equipment must be only attached at the points specified by the manufacturer. Ensure that the unit casing is not crushed by slings, s by incorporating sufficient protection around casing if required. Use auxiliary rigging equipment when and where required. Use a rigging device appropriate for the unit's weight. You will find the weight of the unit in the submittal documents (see( Setup and other applicable documents, page 7). 7 Do not use connection pieces and header pipes as hooking points for lifting, pulling, fixing or mounting. This can cause leaks. Rig the unit carefully. In particular avoid a setting the unit down hard. 7.2 Transportation,, rigging and storage NOTICE Read and observe all rigging signs on the units' u packaging Prolonged mechanical stresses caused by uneven road surfaces and potholes, and vibrations during transport by ship can cause transportation damage. Before transportation by sea or in countries with difficult transport routes, attachment parts that are likely to vibrate in particular fans and base stands must be removed for transportation. Rigging the unit at the job site Unloading the unit

37 Güntner NLA 37/69 Rig and and unload the crated unit with suitable transport equipment (e.g. forklift, crane) at the job site. site. CAUTION: When transporting with a forklift: Only lift the crated unit with fork lengths lengths extending beyond the outer reaches of the crated skid section. section.

38 Güntner NLA 38/ Storage before installation NOTICE Danger of corrosion and dirt build-up up Ammonia as a refrigerant is extremely deliquescent, i.e. it attracts moisture. Moisture and dirt must be prevented from entering the unit. Protect the unit against dust, dirt, moisture and wetness, damage and other harmful effects. Harmful effects: see Safety instructions for set-up and start-up, page 39 Do not store the unit for longer than necessary. Only store the units in their original packaging until installation. Store the unit at a protected place free of dust, dirt, moisture and damage-free until it is installed (well-ventilated halls or roofed storage site). If the unit installation is delayed with regard to the planned installation time: protect the unit against weather and other harmful effects and dirt and other contaminants with an appropriate cover. The unit must also be well-ventilated during storage.

39 Güntner NLA 39/69 8. Set-up and start up 8.1 Safety Safety instructions for set-up and start up Danger of injuries and damage to property with leaking ammonia refrigerant Incorrect installation can cause the danger of refrigerant leaks when the unit is put into operation, and injuries or damage to property can occur (see Residual hazards with ammonia (NH3), page 19). Follow the set-up instructions in this chapter precisely and apply extreme care NOTICE Damage to the system's cooling equipment Foreign materials and contaminants in the refrigerant circuit can impair the effectiveness or damage components. Particularly harmful contaminants are: Moisture Atmospheric air Welding residues Rust Soot/ash/cinders Metal cuttings Unstable oils Dust and dirt of all kinds Moisture in the refrigerant-carrying arrying components of the unit can have the following consequences: Water separation and ice formation cause faults in the switching and control fittings of the refrigeration system Acidification Ageing and refrigerant t oil decay Corrosion Atmospheric air and other non-condensable gases can have the following consequences: Refrigerant t oil oxidation Chemical reactions between refrigerant and refrigerant oil Increased condensing pressure in the system Chemical reactions between refrigerant and refrigerant t oil with the absence of moisture or atmospheric air with ageing and refrigerant and refrigerant t oil decay can have the following consequences: Formation of organic and inorganic acids Increased discharge temperature in the system Corrosion Bad lubrication, increased wear and tear through to system or failure Other contaminants can cause: Accelerated chemical processes (decomposition) Mechanical and electrical faults in the refrigeration system Ensure with installation (connecting the t refrigerant-carrying components of the unit to the refrigerant- carrying system components of the installation) that internal contamination is strictly avoided.

40 Güntner NLA 40/69 Perform the installation with extreme cleanliness. Finish all on-site pipe installation work k before releasing the holding charge Only release the holding charge at the Schrader valve immediately before final connection. Only remove the sealing caps on the distribution and header pipe immediately before final connection. Danger of corrosion rosion and dirt t build-up up NOTICE The refrigerant ammonia is highly hygroscopic, i.e. it attracts humidity. Humidity and dirt may not get into the unit's interior. If humidity or dirt get into the unit's interior, fittings and other components of the refrigeration installation can be damaged. Protect the unit against dust, contamination, moisture and wetness, damage and other harmful influences. Harmful influences are, for example: Mechanical: Damages caused by impacts, objects falling on or against, collisions with transport equipment, etc. Physical: Damages caused by exposure to flammable gases Chemical: Damages caused by contaminated atmospheres (salt, acid, chlorine, sulphur-containing, or similar) Thermal: Damages caused by exposure to heat sources Start as soon as possible with installation. Only qualified personnel familiar with AC motors and associated machinery should plan or implement the installation in accordance with local and national applicable codes s and regulations. Failure to comply may result in personal injury and/or equipment damage System side safety requirements The unit is a component of an installation and can only be operated in conjunction with the installed system All equipment required for operating the unit must be integrated into the switching and activation equipment: Electrics: Fans, heater rods with electric defrosting where app. (selection option), Refrigerants: valves and fittings Condensate water: condensate drain line An emergency STOP switch that can be actuated without danger must be installed. The refrigerant-side and electrical connections must be available within the system. The connections must be specified in the submittal documents. The power supply for the fan motors must be provided in acc. with the specifications on the name plate on the motors. A lock-out device for preventing unexpected start-up (repairs switch), which separates all active conductors from the power supply (all-pole switch-off), must be provided for the motors.

41 Güntner NLA 41/69 The fan motors' switch-on/off device must be secured (e.g. with a padlock) to prevent uncontrolled motor start-up. The electrical motor, disconnect switch, terminal box and electrical panel connections must be provided in acc. with the respective connection diagrams. It must be possible to shut off the unit if a leak occurs. It must be possible to activate all devices meant for diverting released refrigerants from a safe position Customer side safety requirements Danger of injuries and damage to property The unit contains ammonia as a refrigerant (NH3). Ammonia is a potentially explosive and flammable substance. Ammonia is a toxic irritant gas. An ammonia concentration of 0.2 vol % in the ambient air or a prolong longed period in the ammonia- containing ambient air ammonia can be life-threatening or fatal. Install the electrical equipment (for fan operation, for ventilation, for lighting and for the alarm arm system) in the working room while observing the moisture condensation and condensate water formation on the coil,, as well as the risk level of ammonia (NH3). Arrange ammonia detectors and alarm systems for warning about explosion or fire dangers, about health-endangering endangering ammonia concentrations and for control purposes in the unit working room. Ensure that the unit in the working room is not exposed to any inadmissible high temperature effects. Effectively protect the unit against heat sources or temporary ry high temperatures. Danger of environmental pollution Ammonia releases can enter the environment in a wind-born manner.. Ammonia is lighter than air and rises quickly. It is diluted with the air to harmless concentrations. centrations. But even if the concentration is harmless, the ammonia smell is still irritating. Ammonia is i s classified as "toxic" and means that people in the area can be affected. Set up the unit so that liquid ammonia, which can be released from the unit t in the event of a fault, cannot enter water systems or sewage. With significant ammonia releases into the waste water system, for example when ammonia vapor is broken down by water: immediately report the incident to the responsible office for the local l waste water system. If an ammonia concentration has formed on the floor under the unit, covering with a film (PE, for example) or synthetic medium expansion foam (fire department) can prevent almost all the heat dissipation to this liquid and therefore the vapor formation, so that there is enough time for disposal measures.

42 Güntner NLA 42/ Requirements at the installation location You will find the dimensions and weights in the submittal documents. Position the unit so that it cannot be damaged by internal traffic or transport processes. Enable optimum unit control and accessibility: Place the unit so that is can be monitored and controlled from all sides at all times. Ensure that sufficient space is provided for maintenance. Ensure that all liquid-carrying components, connections and lines and all electrical connections and lines are easy to access. Ensure that there is free space for unobstructed changing out of heater elements with electric defrosting (accessory at customer's request). Ensure that the piping identification is clearly visible. Ensure that the free space on the side of the unit (e.g. the side distance from the unit to any possible obstructions) is large enough so that the hinged side panels can be opened hazard and obstruction-free. 8.3 Unpacking the unit The units are delivered packed in the installation position with mounted drain pan.

43 Güntner NLA 43/69 Item Dimension A 4 X 1 (100 mm X 25 mm ) B 4 X 1 (100 mm X 25 mm ) C 4 X 2 (100 mm X 50 mm ) D 4 X 2 (100 mm X 50 mm ) E 4 X 2 (100 mm X 50 mm ) F 4 X 2 (100 mm X 50 mm ) G 4 X 2 (100 mm X 50 mm ) H 4 X 2 (100 mm X 50 mm ) Remove transport protection front, back and sides Transport rack (skid) is intended for subsequent lifting of unit (including the mounted drain pan) for installation on site (see Mounting the unit, page 44). Remove unit from packaging: When lifting insert the forks under the transport frame, as this protects the drain pan. The units are delivered in the installation position with mounted drain pan. CAUTION! The transfer vehicle's capacity must be at least 1.5-times the weight of the unit. Check delivery scope for completeness. For complete delivery scope, refer to the submittal documents. Any transport damage and/or missing parts must be recorded on the bill of delivery. The facts must be immediately reported to the manufacturer in writing. Damaged fins can be straightened on-site with a fin comb. Check transport excess pressure: The units are delivered by the manufacturer with approx. 20 psi (1.4bar) holding pressure (clean dry air). Check transport pressure at the Schrader valve (pressure measurement). For pressure-less unit: Report immediately to manufacturer and note missing pressure on delivery note. A pressure-less unit indicates leaks on the unit.! Danger of injuries or damage to property caused by escaping refrigerant A pressure-less unit indicates leaks on the unit due to transport damage. Leaking refrigerant due to leaks on the unit can lead to injuries or even deaths (see Residual hazards with ammonia (NH3), page 19). Do not put the unit into operation Check transport holding charge and release pressure (only prior to final connections). Remove sealing caps. 1: Check and release holding charge pressure 2: Remove sealing caps. Danger of corrosion and dirt build-up up NOTICE

44 Güntner NLA 44/69 Ammonia as a refrigerant is extremely deliquescent, i.e. it attracts moisture. Moisture and dirt must be prevented from entering the unit. Protect the unit against dust, dirt, moisture, wet conditions, damaging aging and other detrimental influences. Detrimental influences: see Safety instructions for set-up and start-up, page 39 Begin with the installation as soon as possible. 8.4 Installation System-side side requirements for stress-free installation Prevent stresses to the unit: Ensure that all mounting points have the same spacing at the mounting level. Ensure that all mounting points maintain the same spacing to the mounting level under load and when permanently positioned. Set and mount units as follows: Airflow must not be impaired by obstructions. The units must be installed on mounting points that are appropriate for the unit's weight and then bolted with securing bolts. The operator or installer of the equipment is responsible for ensuring that the bolted connections are of an adequate strength. The following instructions must be observed when mounting the units: The diameter of the mounting holes have been statically determined by the manufacturer; the mounted bolts must be sized accordingly. When calculating the transferring bearing strength it is imperative to take into account the total weight of the unit (= structural weight + weight of pipe content + additional weight, such as water, frost, ice, dirt or similar). The mounting bolts must be secured to prevent against loosening with an appropriate locking device. The mounting bolts must not be over tightened or stripped. All mounting bolts must be tightened equally. Prevent the unit from shifting in its position. Fix the unit in its position. Tighten the mounting bolts and secure them to prevent loosening. Ensure that the condensate water drains correctly. Set up the unit horizontally with a sufficient slope for the condensate water run-off. The units are delivered in the installation position with mounted drain pan Mounting the unit Danger of injuries and damage to property with released ammonia refrigerant In case of improper installation, refrigerant leaks can occur during operation on of the installation, this can lead to injuries or damage to property (see Residual hazards with ammonia (NH3), page 19) Only hang the unit to the mounting points intended for this.

45 Güntner NLA 45/69 1 Hang the unit from ALL the respective hanging points (1). All mounting bolts / threaded rods must be tightened equally to achieve a load distribution that is as balanced as possible. CAUTION! Bolts must not n be overtightened or stripped The mounting bolts must be secured to prevent loosening with appropriate locking devices Notes on connecting the unit Danger of injuries and damage to property with released ammonia refrigerant In case of improper installation, refrigerant leaks can occur during operation of the installation, ation, this can lead to injuries or damage to property (see ( Residual hazards with ammonia (NH3), page 19). Prevent refrigerant leaking from the unit into the atmosphere. Secure all refrigerant-carrying lines against mechanical damage. In areas that are a used for internal traffic, only lay the piping ing to and from the unit with connections and fittings that cannot be removed.

46 Güntner NLA 46/69 Ensure that the job-site connections do not exercise any forces upon the distribution and header points. This can cause leaks to the refrigerant connections of the unit and on connection points of the job-site piping. Ensure that: Release devices to prevent refrigerant leaks are provided and available. With refrigeration system in a shutdown state, sub-cooled liquid is only present ent at a minimal level in system components. When switching over from a duty pump to a stand-by pump no liquid or cold refrigerant remains in the pump Connecting the drain line to the drain pan Insulated panel Drain line with inclination of ¼ per foot Union Insulation covering drain line (heat trace internal) Trap The drain line should be as short as possible with at least ¼ per running foot of inclination. The drain line should be the same size, or larger, as the drain pan connection. A drain line trap should be installed to prevent warm moist air from migrating through the drain line. The trap should be located in the warmest and/or lowest section of the piping to avoid freezing and provide sufficient liquid head for flow through the trap. If the temperature surrounding the drain line is below freezing 32 F (0 C) it must be installed with heat trace and insulated to prevent freezing. Be sure to also insulate the drain pan coupling. The drain line heater trace should be energized continuously and the drain line trap should be outside of the freezing space. A union at the drain pan connection is recommended for future servicing. The fitting should be located just outside the edge of the drain pan so that when the pan is lowered for cleaning or repair the drain line run is not in the way. Long runs of drain line, i.e. more than a few feet, should be supported by hangers to avoid damage to the drain pan. For cleaning and inspecting the drain, tees with plugs are recommended instead of elbows.

47 Güntner NLA 47/ Connect the unit to the system Danger of injuries and damage to property Improper connection to the system causes hazards: Leaks result in released toxic refrigerant,, NH3 (see Residual hazards with ammonia (NH3), page 19). Soldering and welding work on pressurized parts can result in fires or explosions. Smoking or open light can cause fires or explosions. Ensure that stresses and vibrations from the system are isolated from the unit. Refrigerant efrigerant-side connections must not be load bearing!! The job-site piping ing system must be supported before connecting to the unit Soldering and welding work is only permitted on unpressurised units Evacuate the unit The use of open fire at the installation site is forbidden. Fire extinguishers and extinguishing agents used to protect the equipment and the operating staff must comply with local or national requirements. Ensure that refrigerant detectors and alarm systems for warning about explosion or fire dangers, about health-endangering endangering concentrations and for control purposes are installed at the unit working point Install the pipes and ensure: Release devices to prevent liquid releases must be provided and available. That in shutdown state sub-cooled liquid is only present at minimum levels in system sections. That when switching over from a duty pump to a stand-by pumps no liquid or cold refrigerant remains in the pump. That the piping installation is kept as short as possible. Use as few bends as possible, and if bends are necessary, use big radii Piping for hot gas, liquid and suction lines must always run apart and must be insulated. Special treatment is required when using ammonia-soluble refrigerant oils in the refrigeration system; it may be necessary to install driers (ammonia-soluble refrigerant oils have an even greater affinity to water than NH3 itself). The free space around the unit (e.g. the distance from the drain pan underside to any possible existing pipe systems) must be large enough to ensure there is no danger to the unit; regular maintenance of the components must be possible, and it must also be possible to check and repair components, pipes and fittings. It must be possible to shut off the unit if a leak occurs. It must be possible to activate all devices used for diverting released refrigerant from a safe position. Electrical components, e.g. for fan operation, for heater element operation, for ventilation, for illumination and for alarm system on installation site, have to be designed with regard to condensation of humid air and condensate droplet formation All connections must be welded and ensure: Prevent leaks, weld precisely and carefully All work In accordance with AWS Prevent overheating when welding (danger of excessive scaling) Use shielding gas when welding (prevent excessive scaling)! Unit electrical connections and protections Field wiring should comply with NEC and local codes. The power supply voltage, phase and frequency must match what is shown on the unit name plate. Each motor was wired so that the fan rotation is counterclockwise.

48 Güntner NLA 48/69 Wiring for a unit with air defrost or hot gas defrost without mounted electrical panel requires power to the fan motor terminal blocks only. The fan motor terminal blocks are located in the junction box on the same side of refrigerant connection end of the MANP.3 unit. Below you will find a standard fan motor terminal diagram for typical unit wiring with 460V/3~/60Hz power. If a mounted control panel is provided, wiring to only one set of terminal blocks is required. Review the wiring diagram supplied with unit. A motor in a refrigerated space may draw greater than nameplate amperage due to denser, colder air flowing through the unit. Provide, when required, and adjust individual motor overload protection in accordance with local applicable codes and regulations. 8.6 Perform acceptance test Danger of injuries and damage to property Released ammonia refrigerant (NH3) ) can cause injuries or even death. (see Residual hazards with ammonia (NH3), page 19). Perform the following acceptance test with an expert before starting up the unit, after making required repairs and after a unit change-out. Ensure that the temperature and the air humidity at the working point correspond with the technical data (see Technical data, page 26).

49 Güntner NLA 49/69 Ensure that there are no restrictions to the air path/s. Ensure that the electrical supply feed is in accordance with name plate data. Connect all control wiring where required. Test the unit for vibrations and movement that can be caused by the fans and operation of the system. Remove oscillations, vibrations and movement after consultation with the manufacturer or independently. Perform visual inspection of the structural design, the brackets and fixtures for mounting. Ensure adequate access to operate and the positioning of all fittings and mountings. Check and re-tighten all threaded connections, especially on motor mounts and fan impellers. Check installation of pipe connections. Check bracing of refrigerant-carrying connection pipes. Ensure that the unit is protected against mechanical damage. Ensure that the unit is protected against inadmissible heating up and possible cooling down. Check fan guard protection is properly in place and securely fastened. Ensure that optimum unit control and accessibility are guaranteed. Is the unit placed so that it can be monitored and controlled from all sides at all times? Is sufficient space provided for maintenance? Are all refrigerant-carrying components, connections and piping, and all electrical connections and wiring easy to access? Are the pipes easy to identify? Check heat exchanger surfaces for dirt and clean as required (see Clean unit, page 62). Perform function tests on the fans (rotation direction, power consumption, etc.). Check electrical connections of the fan motors and, where applicable the heater elements with electric defrosting for damage. Check the quality of the welding connections, the electrical connections and the fixture connections. Perform pressure test with test gas and with a test pressure of 1.1-times the permissible operating pressure: check the connection seals and detect leaks, e.g. with foaming agent, or similar. Check corrosion protection: Perform a visual inspection on all bends, components and component holders that are not heat-insulated. Document and archive test results. Perform test run. Observe and check unit during test run, in particular for: Smooth fan operation (bearing noises, contact noises, imbalances, etc.) Fan motor power consumption Leaks Report all defects to the manufacturer immediately. Remove defects following consultation with the manufacturer.

50 Güntner NLA 50/69 Check the unit and the unit's interaction within the system again after 48 operating hours, especially at wiring connections and at motor terminals, and document the test results. 8.7 Test readiness for operation Ensure that all electrical protective measures are operational. Ensure that all refrigerant-carrying connections are securely fastened. Ensure that all electrical connections (fan motors, if applicable heater elements for electrical defrost) are securely fastened. Ensure the all drain connections to the condensation water drain pipe are correctly installed and securely fastened. (see Connecting the drain line to the drain pan, page 46) Putting the unit into operation for the first time Danger of injuries and damage to property Released ammonia refrigerant (NH3) ) can cause injuries or even death. (see Residual hazards h with ammonia (NH3), page 19). Only put the unit into operation, when: The unit has been properly mounted and connected (see( Installation, page 44), 4 You have performed a complete acceptance test (see( Perform acceptance test, page 48). You have performed a test for ensuring the system's readiness for operation (see ( Test readiness for operation, page 50) 5 ) and All safety precautions (see Safety, page 39) ) have been taken. Follow the operating instructions manual for the refrigeration system Contact the manufacturer immediately if you want to operate the unit under different operating conditions as those defined in the submittal documents. Switch the system on (see system). Activate the unit: Open the valves on the inlet and outlet-side system. Activate fans Put condensate water waste line into operation Wait until the operating point is reached. After the operating point is reached the unit is ready to operate (see system). Parameters for setting the operating points see submittal documents. Operating point: Evaporation temperature Refrigerant feed and rate thereof Airflow volume Air inlet temperature Relative air humidity

51 Güntner NLA 51/69 To ensure the specified operating point is complied with the controls for the operational set point must be secured against unauthorized access (e.g. by sealing, screwing on caps, removing hand wheels, etc.) 9. Operation 9.1 Safety Danger of cutting, pinching There is a danger of fingers been cut off from the rotating fan blades, injury hazard for the hands and danger of being pulled in with loose elements such as hair, necklaces or clothing parts. Do not operate fans without fan guard/s Ensure that the optional hinged fan assemblies are fixed and secured against ainst unintentional or unauthorised opening. Danger of frostbite/burning Danger of frostbite or burns if the parts are touched (see( Thermal residual hazards, page 18). Do not touch any parts of the unit without protective gloves when the unit is in operation or if it has not yet warmed up or cooled down after operation. 9.2 Putting the unit into operation To operate the unit the system including the electrical controls must be in operation. The unit must be started up by opening the respective shut off valves on the entering and leaving sides of the unit and by activating to the electrical control system, and the condensate water line as follows (see system operating instructions manual): Switch on electrical control system Open all shut off valves for refrigerant carrying lines Switch on fan motors Put condensate water drain line into operation

52 Güntner NLA 52/ Taking the unit out of operation The unit/s is a system component of the refrigeration installation. The unit is taken out of operation by switching off the system in acc. with the refrigeration system operating instructions manual for the entire installation. To do this, the refrigerant-carrying lines must be shut off from system and the fans, and, if applicable, the heater elements for electrical defrost, must be disconnected from the electrical system (see operating instructions manual): Switch fans off Switch electrical control system off Close refrigerant-carrying line s shut off valves NOTE! When shut down consider maximum operating pressure! If necessary, take precautions so that it cannot be exceeded. NOTICE With shut down times of a month or longer put the fans into operation for approx hours a month to maintain their functionality. 9.4 Shutting down the unit Danger of injuries and damage to property Released NH3 refrigerant can cause injuries or even death (see( Residual hazards with ammonia (NH3), page 19,, and see Residual hazards caused by pressurized parts, page 21). 2 Ensure that the maximum operating pressure is not exceeded during the shutdown period Danger of corrosion and dirt build-up up NOTICE Ammonia as a refrigerant is extremely deliquescent, i.e. it attracts moisture. Moisture and dirt must be prevented from entering the unit. Protect the unit against dust, dirt, moisture, wet conditions, damaging and other detrimental influences (see Safety instructions for set-up and start-up, page 39). With shut down times of a month or longer r put the fans into operation for approx hours a month to maintain their functionality. Take the unit out of operation (see Taking the unit out of operation, page 51). Secure the unit: When shutdown consider maximum operating pressure (see Technical data, page 26) If necessary, take precautions so that it cannot be exceeded. Secure the fan motor drives and, where applicable, the heater elements with electric defrosting against switching on again. (Lock out procedure) Secure refrigerant-carrying lines against excessive pressurization. Secure unit against detrimental influences at the installation or storage location (see Safety instructions for set-up and start-up, page 39) in order to keep all unit components in good state for

53 Güntner NLA 53/69 proper use and to conserve the usability of the unit. For this purpose, special storage conditions (see Storage before installation, page 38) and preventative measures for corrosion protection have to be provided, regular testing of the functionality of the fans and of the unit taken out of operation have to be effected. Evacuate the unit: Completely release refrigerant and, if applicable, refrigerant oil (see Residual hazards with disposal, page 24). 9.5 Putting the unit into operation after shutdown The unit must be put back into operation after a shutdown in acc. with the system-specific set-up in acc. with the operating instructions manual as follows: Test the unit's readiness for operation (see Test readiness for operation, page 50). Perform pressure test and visual inspection for corrosion protection. NOTE! The pressure test with recomisioning must only be carried out with appropriate media at appropriate test pressure. Put the unit into operation (see Putting the unit into operation, page 50). 9.6 Changing the unit over to another refrigerant Danger of injuries and damage to property Considerable dangers can be caused with operation with another refrigerant without prior manufacturer approval (Improper ( use). The unit t must not be changed over to another refrigerant without prior written consent by Güntner Ensure that the unit manufacturer has agreed to the changeover. Ensure that the right refrigerant is re-filled. Ensure that all materials used in the unit are compatible with the new refrigerant. Ensure that the permissible pressure is not exceeded. Check that the new refrigerant can be used without requiring a new test certificate for the unit. Ensure that equipment classification is complied with. The safety device for the unit must be changed out or reset. Mixtures with residues of refrigerant and oil, for example, must be prevented. All information concerning the new refrigerant must be changed accordingly. The complete documentation, including these operating instructions and the system operating instructions manual must be changed accordingly. Perform acceptance test (see Perform acceptance test, page 48).

54 Güntner NLA 54/ Troubleshooting 10.1 Safety Danger of injuries s and damage to property Faults that are described in these operating instructions must only be rectified by suitably qualified and trained personnel (see Personnel, care requirements, page 15). 1 With faults that occur during the operation, monitoring and maintenance of the complete system, inform Güntner immediately Service Güntner de México S.A. de For USA Guntner US LLC Av. Rogelio González Caballero No.1000, 1870 N. Roselle Rd Parque Industrial Stiva Aeropuerto Schaumburg, IL Apodaca Nuevo León, C.P Mexico USA Office Tel: Office Fax: F address: sales@guentner.com.mx.mx sales@guntnerus.com 10.3 Troubleshooting table Fault Possible cause(s) Action Fan motor is not running Power supply interrupted Restore power supply Fan blade stuck Enable impeller to rotate freely Bearing noises Defective fan motor Renew bearing or fan motor Unit vibrating Defective fan blades Change impeller Loose fan fixture Tighten fixture Heat exchanger is very dirty, frosted, Clean, defrost heat exchanger iced on the air side Unit capacity not achieved Fans not running properly or down Repair, change out impeller Refrigerant leaking 10.4 Dealing with faults Try to determine the size of the leak. Refrigerant pressure and / or feed defective (temperature and quantity insufficient) Unit refrigerant carrying components leaking If the room can be entered with a protective device for the respiratory system, provide emergency ventilation before entering the room shut off ammonia refrigerant feed Set refrigerant valves (temperature and quantity) to reference values Shut off refrigerant feed and fans, repair the leak

55 Güntner NLA 55/69 With the tiniest suspicion of injured people in the ammonia area, sound the alarm. First get people to safety, then remove leaks. Close all doors to the room in which the refrigerant is leaking. Activate Emergency STOP switch. Valves, motors and other components are therefore switched off to prevent ammonia from leaking. Close shut-off valves, especially to the liquid side, where possible in sections, so that the ammonia quantity in the leakage area is kept as low as possible. If possible evacuate/drain the systems section in question and move the refrigerant/ to other systems sections. Here too it must be ensured that no liquid ammonia is locked in by shutting off system sections. If an ammonia pool of liquid has formed on the floor under the unit, covering with a film (PE, for example) or synthetic medium expansion foam (fire department) can cut off almost all the heat dissipation to this liquid and therefore the vapor formation, so that there is enough time for disposal measures.

56 Güntner NLA 56/ Maintenance 11.1 Safety Before starting all maintenance Danger of injuries and damage to property with leaking refrigerant (see Residual hazards with ammonia (NH3), page 19)! Only perform maintenance work especially welding work on the leaking unit after completely removing the refrigerant from the unit Perform the following safety measures before beginning b all maintenance work: Drain the unit's heat exchanger coil Clean and evacuate out the unit's heat exchanger coil With all maintenance work Danger of injuries and damage to property with leaking ammonia refrigerant Leaking NH3 refrigerant can cause the following hazard situations and injuries with leaks on the evaporator: Warning against explosion-risk and flammable substances in the working area Unintentionally oil residue and NH3 refrigerant can ignite. Keep the risk area free of direct and indirect ignition sources. Before releasing the units for maintenance obtain the required approvals for work that can involve ignition sources (e.g. grinding, welding, soldering, etc.). With all work involving ignition sources (e.g. grinding, welding, etc.) in the work area, keep suitable fire extinguishing equipment. Do no bring any open flames or hot gases (e.g. candles, matches, welding beads, welding sparks, glowing cinders or tobacco) into the working area. Ensure that there are no warmed up or hot surfaces (e.g. heaters, hotplates, bulbs, motor housings) in the working area. Ensure that no friction heat develops in the working area

57 Güntner NLA 57/69 Warns against corrosive substances in the working area NH3 refrigerant still present is corrosive. Contact with the skin, mucous membranes and the eyes, NH3 refrigerant in a liquid or vapor phase causes chemical burns on the skin, mucous membranes and the eyes. Use eye protection Use hand protection Warns against toxic and health-endangeri endangering ng irritants in the work area Inhalation of refrigerant vapor is poisonous. Leaking refrigerant vapor and / or liquid must not reach adjacent rooms, staircases, yards, passages or drainage e systems. Use respiratory protection. Use a room air-independent independent breathing apparatus with maintenance work in high ammonia concentrations in the affected area. Ensure the work area is well ventilated. Divert leaked refrigerant vapor and / or liquid safely. Warns against cold Saturated NH3 refrigerant can have a temperature of -27 F (-33 ( C). Contact with NH3 refrigerant under defervescence caused by spraying causes frostbite. Use eye protection

58 Güntner NLA 58/69 Use hand protection Ensure that the unit in question is pressure-free before maintenance work begins or the refrigerant is removed from the unit in question. Power off the electrical system and secure it against unintentional switching on again. (Lock out procedure) Isolate the unit to be worked on from the refrigeration system and secure it. With hinged fan assemblies (optional) and the hinged side panels you have easy access to the heat exchanger coils, the fan motors and the connections. NOTICE After all maintenance work Lock out procedure required When working at the entering and leaving paths of the fans and heat exchanger, objects can get into the fans and therefore cause faults and damage on the components. Power off the fans and, where applicable, the heater elements with electric defrosting (accessory at customer's request) before beginning maintenance work and secure them against switching on again. After the work has finished do not allow any objects to be in the entering and leaving paths of the fans or the working area. Danger of injuries and damage to property with leaking ammonia refrigerant (see( Residual hazards with ammonia (NH3), page 19)! Perform the following safety measures after finishing all maintenance nance work: Ensure the switching and activation devices, the measuring and display devices and the safety devices function properly. Ensure the refrigerant fittings are functional al. Ensure that hinged fan assemblies (optional) and the hinged side covers are secured in their original position and secured against unintentional or unauthorized opening. Check the identification of the pipelines and ensure this is visible and legible. Check the mountings and corrosion protection of the components in question. Ensure the electrical connections (fans and, where applicable, the heater rods with electric defrosting) are functional al. Ensure the temperature and air humidity at the working area are the same as that in the submittal documents. Perform a pressure test and a tightness test (see operating instructions manual annex). Perform an acceptance test (see( Perform acceptance test, page 48). Perform a pressure test (see operating instructions manual annex).

59 Güntner NLA 59/ Inspection and maintenance plan The regular safety related checking of evaporators in an ammonia refrigeration system, is a prerequisite for meeting the local requirements and/or national requirements and these must be performed by a "qualified person". The operator must determine the test intervals for the complete system and the system components on the basis of a safety-related evaluation. Nevertheless, as with every technical installation, results, whereby it can generally be said the most frequent causes are not material errors, but operating errors, cannot be ruled out. The checks to be performed are listed in the following sections as time-scaled checklists Fans and motors The manufacturer's operating specifications take priority for this component. Güntner recommends proceeding in acc. with the following inspection and maintenance plan: d = daily, w=weekly, m = monthly, y = yearly Work to be performed d w m y Check fans for dirt and ice build-up X With dirt build-ups: Clean fans (See Clean unit, page 62) With frost and ice build-ups: Defrost the unit (See Defrosting the unit, page 65) Check the fan drive for smooth operation X Vibrations on the unit: remove imbalances Where required, tighten and correct blade fixtures and blade settings Fan motor bearing: Rubbing sound and operational changes X Change out bearing Fan motor: Is a new bearing due? X Change out bearing or motor; where applicable, clean and repair motor Impeller: corrosion on bolts * X Change out bolts Impeller blades: corrosion or damage on blades X Change out blades or impeller hub *: Recommended every two years

60 Güntner NLA 60/ Unit heat exchanger Danger of injuries and damage to property with w leaking ammonia refrigerant (see( Residual hazards with ammonia (NH3), page 19) Perform a regular external check (visual inspection) on the unit every 5 years. Güntner recommends you have the test performed by an expert. d = daily, w=weekly, m = monthly, y = yearly Work to be performed d w m y Check heat exchanger for dirt, frost and ice build-up X With dirt build-ups: Clean heat exchanger (See Clean unit, page 62) With frost and ice build-ups: Defrost the unit (See Defrosting the unit, page 65) Check heat exchanger s general condition X Damages found: remove damages Check heat exchanger s operating point (see Operation, page 51) X Change in fan capacity found: Restore required system side conditions Change in surface temperatures found: restore required system side conditions Check heat exchanger and connections for tightness X Repair unit sections (See Remove leaks, page 61) * Check heat exchanger for refrigerant pressure rating X Restore required system side conditions Check heat exchanger for corrosion X Corrosion or damages on core tubes, fins, support structures, pipe connections, fixtures: repair unit sections affected *: Recommended every six months * Care and maintenance plan Measure Cleaning agent Interval Remove frost and clean component Mechanically As required (visual inspection) Heat exchanger defrosting Circulating air, hot gas, According to local conditions automatic defrosting device (infiltration, air or refrigerated product); with an ice thickness of 0.04 in (1 mm) at the latest Complete cleaning Warm water or environmentally After 120 hours safe cleaning agent Leak check Every six months Corrosion protection check Every six months

61 Güntner NLA 61/ Maintenance work Remove leaks Danger of injuries and damage to property with ammonia as refrigerant (see ( Residual hazards with ammonia (NH3), page 19) Have leaks removed as quickly as possible by a qualified technician. Do not charge with a refrigerant other than that specified in the submittal documents Only put the unit back into operation when all leaks have been repaired. Perform all work including pressure, acceptance and functional test (see Perform acceptance test, page 48, and see Test readiness for operation, page 50) Clean unit General The drain pan is hinged and removable for easier cleaning. The following applies for cleaning: The operator must ensure that the cleaning agent is environmentally friendly. Cleaning agents harmful to the environment e.g. acid-forming, are forbidden. Clean casing by rinsing with warm water approx. 77 F (25 C) and/or with environmentally friendly cleaning agents. Rinse thoroughly with water after using cleaning agents. Allow casing to dry completely. Securely close side panels and removable and hinged drip tray in their original positions and secure against unintentional or unauthorized opening. Check refrigerant-carrying and electrical connections (see Test readiness for operation, page 50).

62 Güntner NLA 62/ Clean heat exchanger Drain the unit (see system). Shut off the unit (see system). Power off the fans (see system). Perform defrosting (see system). Clean the heat exchanger with one of the following procedures: Cleaning with compressed air (see Cleaning with compressed air, page 62). Hydraulic cleaning (see Hydraulic cleaning, page 63) Cleaning with brushes or brushes and compressed air (see Cleaning with brushes or brushes and compressed air, page 64). Danger of damage to property NOTICE The fins can be damaged with too high a pressure, too small a distance or a cleaning jet that hits the fins at an angle. Mechanical cleaning with hard objects (e.g. steel brushes, screw drivers, or o similar) can damage the heat exchanger surface. Use a pressure of max. 725 psi (50( bar) with hydraulic cleaning and max psi (80( bar) with cleaning with compressed air Maintain a minimum distance from the fins of 8 (+/ +/- 200 mm) Always aim the jet vertically (max. ±5 degree deviation) at the fins Do not use any hard objects when cleaning Switch fans on (see system). Open suction side shut off valves (see system). Open refrigerant feed (see system) Cleaning with compressed air Blast heat exchanger (max psi (80 bar) pressure) with compressed air to remove dirt and contaminants. NOTE! Hold the jet of the cleaner vertical to the fins (max. deviation of ±5 degrees) to prevent fins from bending

63 Güntner NLA 63/ Hydraulic cleaning Lock out Procedure required Warns against dangerous electrical voltage Direct and indirect contact with voltage-carrying parts of motors and electrical switchgear can cause serious injuries or death. Water and cleaning agents conduct electricity. Power off the fans when cleaning with water or pressurized steam Danger of damage to property NOTICE Water or steam jets can damage fans, electrical lines or other components. Ensure that electrical connections and motors, as well as components and stored goods in the working area are not in the path of water or steam jets. Cover these if required. Heavier deposits or greasy dirt must be removed with a high-pressure water jet (max. 725 psi (50 bar) pressure), steam pressure jet (max. 725 psi (50 bar) pressure), min. 8 (200 mm) distance with flat jet nozzle, or using neutral cleaning agent where applicable, always against the airflow direction. Ensure here: With oily and greasy dirt it helps to add a cleaning agent to the water. When applying chemical agents ensure that they are not aggressive towards the unit's materials. Rinse the unit off after the treatment. Cleaning should be done from inside to the outside (but always opposing the dirt onset) and from top to bottom, so that the dirt can be removed without returning. Hold the jet of the cleaner vertical to the fins (heat exchanger max. deviation of ±5 degrees) to prevent fins from bending. Continue cleaning until all dirt has been removed.

64 Güntner NLA 64/ Cleaning with brushes or brushed with compressed air Remove dry dust or dirt with a brush, a hand brush or with compressed air (max psi (80 bar) pressure, min. distance of 8 (200 mm) to the fins; against the airflow direction or with a powerful industrial vacuum cleaner. Ensure here: Use soft brushes (no steel brushes or similar) Where possible, cleaning should be from the top down. Where possible, cleaning should be from top to bottom, so that the dirt can be removed without the possibility of returning to cleaned parts. Continue cleaning until all dirt has been removed. Always brush the fins lengthways never across Cleaning fans Danger of cutting, pinching There is a danger d of fingers being cut off from the rotating fan blades, injury hazard for the hands and the danger of being pulled in due to loose elements such as hair, necklaces or clothing parts. Power off the unit before you begins maintenance work. Secure the unit against unintentional switching on again by removing the electric fuses for the unit. Secure the unit with a suitable warning sign referring to unintentional switching on. (Lock out Procedure) P Dirt build-ups and frost and/or icing on the fans and the fan guard grilles must be removed regularly; otherwise they will cause imbalances or destruction and power losses. Power off the unit and secure it against unintentional switching on. Remove fan guard/s. Clean fans with one of the following procedures: NOTE! Danger of damage to property. Mechanical cleaning with hard objects (e.g. steel brushes, screw drivers, or similar) damages the fan. Forbidden Cleaning with compressed air: Blow fans with compressed air (max. 145 psi (10 bar) pressure; min. distance 8 (200 mm)) to remove dirt and contaminants. Continue cleaning until all dirt has been removed. Cleaning with compressed air and brushes: Remove dry dust or dirt with a brush, a hand brush or with compressed air (max. 145 psi (10 bar) pressure, min. distance of 8 (200 mm)) or with a powerful industrial vacuum cleaner. Ensure here: use soft brushes (no steel brushes or similar)! Continue cleaning until all dirt has been removed. Mount fan guard/s Switch unit on 11.5 Defrosting the unit Notes on defrosting Defrosting the unit with the correct frequency and duration guarantees continuous operational reliability and the prevention of inaccessibility that could result in a shutdown and disruptions. As the local conditions have a major influence of the unit's performance and the need for defrosting, the operation must be

65 Güntner NLA 65/69 checked regularly and specifically for frost and/or ice buildup on the heat exchanger surface area. The following notes apply for defrosting the unit: Regular checks for frost and/or ice buildup. A 0.04 (1 mm) frost coating on the fins will require the unit to be defrosted in order to guarantee fault-free operation. Defrosting process must start in good time. The frequency of defrosting depends on the amount of infiltration (e.g. through door of refrigerated space), humidity levels in space or refrigerated product/. In this regard, it has to be observed that the temperature difference between refrigerant and air inlet temperature will determine the defrosting frequency requirements: Operation with greater temperature difference: Frequent defrosting Operation with lesser temperature difference: Less defrosting Also changing operating states such as e.g. changes of use at the installation site have to be observed. The defrost frequency can also be influenced by effects on the air side: Insufficient distance between wall and unit, insufficient distance between two units, supporting architectural elements close to air outlet, improper storage of goods (too close to ceiling or wall, crosswise to airflow direction ) can lead to increased defrost frequency. Defrosting completeness When finishing the defrosting process you must ensure that the coil surface area is absolutely clean and free of any frost or ice. Selecting the right defrosting temperature is an important requirement in this respect. If the defrosting temperature is set too low this impairs the unit's effectiveness from one defrost cycle to another with the complete removal of the frost formation. If the defrosting temperature is set too high, or runs for an extended period of time, this causes extreme water vapor formation, which causes frost and ice to form around the outside of the unit. Hot gas defrost: Hot gas piping must be adequately sized to ensure sufficient volumetric flow of hot gas / warm vapor to the coil. Piping too small will result in longer defrosts and possibly insufficient flow to effectively defrost the entire surface area of the heat exchanger surface area. Run time Hot gas / warm vapor flowing through the coil for +/- five to eight minutes is normally sufficient to remove all frost formation off the heat exchanger surface area. This hot gas / warm vapor flow should only be shut off when all condensate from the coil and in the drain pan has emptied out of the pan. Failure to do so will result in ice buildup in the drain pan. Delay fan start If the fans' activation is delayed by a further period (approx. 1 to 3 minutes), then the defrosting heat from the heat exchanger is absorbed and it is not given off into the room as warm-moist air. This delay also allows for any condensate still attached to the fins to freeze again and prevents condensate been carried over into the space or onto the product.

66 Güntner NLA 66/ Defrost control The defrosting process is initiated at pre-set timed or run time intervals or as required. (Air side pressure drop, infra red control) The defrost cycle should have a redundant completion control (either time/temperature or temperature/temperature). For defrost operation (air, hot gas), the correct installation by customer of the defrost sensor has to be observed. See defrost procedures listed below. Recommendation perform the defrosting cycle at the following times: Hot gas defrost cycle Hot gas defrost - sequence of operation; Control valves Defrost stages Time, in minutes (approx.) Liquid solenoid (LSV) Suction solenoid (SSV) Delay Soft hot gas solenoid valve (SHGSV) Hot gas solenoid valve (HGSV) Bleed solenoid valve (BSV) Fan motor/s running Refrigeration mode xx yes Pump out period yes Delay 5-10 secs no Soft gas period 1-2 no Hot gas period 5-30 no Equalizing period 2-5 no Fan delay period 1-3 no Refrigeration mode xx yes = Solenoid open When defrosting with hot gas / warm vapor it must be ensured that during the defrost cycle sufficient other evaporators are in operation so that the required hot gas / warm vapor volume is available (defrost capacity is approx. 2-3 times the cooling capacity, this can be used as reference value). It must, however, be ensured that when defrosting alternate evaporators within a room, defrost isolation devices should always be recommended (inlet hoods, defrost flaps, textile closure devices etc.) Failure to do so can result in longer than anticipated defrost times for the coils in defrost and the carryover of water vapor to the coils in refrigeration mode (from the coils in defrost) resulting in increased frost formation and reduction in overall thermal performance within the refrigerated space.

67 Güntner NLA 67/ Spare parts MANP.3-0 discharge MANP.3-45 or 90 down blow 3 2 1