1 Schaltschrank- Kühlgerät Cooling unit Climatiseur Koelaggregaat Kylaggregat Condizionatore per armadi Refrigerador para armarios SK 3359.xxx SK 338.xxx SK 3383.xxx SK 3384.xxx SK 3385.xxx SK 3386.xxx SK 3387.xxx ontage-, Installations- und Bedienungsanleitung Assembly and operating instructions anuel d installation et de maintenance ontage- en bedieningshandleiding ontage- och hanteringsanvisning Istruzioni di montaggio e funzionamento Instrucciones de montaje R
2 Contents 1 Notes on documentation Associated documents CE labelling Retention of documents Symbols used Safety notes Device description Functional description How it works Control Bus mode (Comfort controller only) Safety equipment Condensation Leak detection Door limit switch (for units with Comfort controller only) Additional interface X3 (Comfort controller only) Proper use Scope of supply Assembly and connection Choosing the installation site Assembly instructions General Layout of the components in the enclosure Assembling the air/water heat exchanger Preparing the mounting cut-out Assembling the air/water heat exchanger Connecting the condensate discharge Connecting the water connection Connection on the side of the unit Connection on the rear of the unit Notes on water quality Notes on electrical installation Connection data Overvoltage protection and supply line load Door limit switch (for units with Comfort controller only) Potential equalisation Carrying out the electrical installation Bus connection (only when interconnecting several units with a Comfort controller) Installing the power supply Commissioning Operation Control using the Basic controller Display and system analysis Properties General programming information Operation of the Basic controller Setting the temperature Setting of system messages Programming and control of the Basic controller Reset of r6 and r7 (min./max. internal temperature) System message contact (; floating) Programming overview of Basic controller Control using the Comfort controller Properties Launching test mode General programming information Eco-mode Editable parameters Programming overview Defining system messages for evaluation Setting the Master-slave identifier Evaluating system messages Inspection and maintenance General Emptying, storage and disposal Technical specifications List of spare parts Further technical information Hydrological data Characteristic curves Water resistance Appendix 1: Cut-out and hole sizes Dimensions for assembly Appendix 2: Preparation and maintenance of the water in recooling systems Rittal air/water heat exchanger assembly and operating instructions
Rittal SK 3384.xxx Assembly Instructions Manual
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3 1 Notes on documentation These assembly instructions are aimed at tradespersons who are familiar with assembly and installation of the air/water heat exchanger, and at trained specialists who are familiar with the operation of the air/water heat exchanger. 1.1 Associated documents There are two sets of instructions for the unit types described here: Assembly and installation instructions enclosed with the unit in the form of a paper document. Assembly, installation and operating instructions enclosed with the unit in the form of a PDF file (Adobe Acrobat) on CD-ROM. We cannot accept any liability for damage associated with failure to observe these instructions. Where applicable, the instructions for any accessories used also apply. 1.2 CE labelling The declaration of conformity is supplied with the unit as a separate document. 1.3 Retention of documents These instructions and all associated documents constitute an integral part of the product. They must be given to the plant operator. The plant operator is responsible for storage of the documents so they are readily available when needed. 1.4 Symbols used Please observe the following safety instructions and other notes in this guide: Symbol identifying required actions: The bullet point indicates an action to be performed. Safety and other notes: 1 Notes on documentation 2 Safety notes Please observe the following general safety notes when assembling and operating the unit: Assembly, installation and servicing may only be performed by properly trained specialists. The minimum water inlet temperature of +1 C must not be reduced at any point in the water cycle. Otherwise there is danger of frost damage! Use antifreeze agents only with the manufacturer s consent. Do not obstruct the air inlet and air outlet of the air/water heat exchanger inside the enclosure (see also section 4.2.2). The heat loss of the components installed in the enclosure must not exceed the specific useful cooling output of the air/water heat exchanger. The air/water heat exchanger must always be transported in a vertical position. Use only original spare parts and accessories. Do not make any changes to the air/water heat exchanger other than those described in these instructions or associated instructions. The mains connector of the air/water heat exchanger must only be connected and disconnected with the system de-energised. Connect the pre-fuse specified on the rating plate. Danger! Immediate danger to life and limb! Caution! Potential threat to the product and its environment. Note: Useful information and special features. Rittal air/water heat exchanger assembly and operating instructions 3
4 3 Device description 3 Device description Depending on the model chosen, your air/water heat exchanger may vary in appearance from the illustrations contained in these instructions. However, the functions are identical in principle How it works The air/water heat exchanger comprises three main components (cf. fig. 2): Heat exchanger package (1), fan (2) and the magnetic valve (3) connected with each other using pipes. Fan (2) 1 Heat exchanger (1) Temperature control 2 3 Non-return valve Magnetic valve (3) 4, 5, 6 7 Cooling water return Cooling water inlet Fig. 1: Device description 9 10 Key 1 Cover 2 Rating plate 3 Display 4 X2 master/slave connection (Comfort controller) 5 X1 terminal strip (underside of the unit) 6 X3 optional serial interface (underside of the unit) 7 Dispatch bag 8 Cooling water inlet 9 Cooling water return 10 Condensate discharge 8 Fig. 2: Air/water heat exchanger The heat loss of the enclosure is dissipated in a membrane heat exchanger to the water coolant. A fan (2) blows the internal enclosure air over the heat exchanger (1); except for the inlet and outlet water and the condensed water discharge, the unit is closed to the environment. The flow regulator (3) controls the cooling output by changing the water flow volume depending on the required housing temperature and the water inlet temperature Control Rittal enclosure air/water heat exchangers are fitted with a controller for setting the functions of the heat exchanger. Depending on the design, this is either a Basic controller (temperature display via LED) or a Comfort controller (display plus extended functions, see chapter 6 Operation, page 15). 3.1 Functional description Air/water heat exchangers are designed and built to dissipate heat from enclosures by cooling the air inside the enclosure and so protect the temperaturesensitive components. Air/water heat exchangers are particularly appropriate for the temperature range of up to +70 C where comparable units, such as air/air heat exchangers, enclosure cooling units or fan-and-filter units, cannot be used for system reasons to effectively and economically dissipate heat loss. It is mounted on the roof of an enclosure. 4 Rittal air/water heat exchanger assembly and operating instructions
5 3.1.3 Bus mode (Comfort controller only) The serial unit interface X2 allows you to create a bus connection with up to ten air/water heat exchangers using the master/slave cable (shielded, four-wire cable, Model No. SK ). This allows you to implement the following functions: Parallel unit control (the air/water heat exchangers in the network can be switched on and off simultaneously) Parallel door status message ( door open ) Parallel collective fault message Data is exchanged via the master-slave connection. During commissioning, assign an address to each unit that also includes the identifier master or slave Safety equipment To protect against overcurrent and overtemperature, the fan is equipped with a thermal winding protection. The unit has one (in the case of the Basic controller) or two (in the case of the Comfort controller) integral floating contacts on the connection terminal (system message relay with change-over contact, terminal 3 5) which may be used to retrieve messages from the heat exchanger, e.g. via PLC. Units with Basic and Comfort controllers are also equipped with a condensate alarm Condensation At high levels of humidity and low cooling water temperatures inside the enclosure, condensation may form on the heat exchanger. Any condensation that forms on the heat exchanger (with high humidity and low water temperatures) is routed to the right and/or rear out of the unit via a drain opening in the plastic tray. For this purpose, a hose must be connected to one of the two condensate nozzles (see 4.4 Connecting the condensate discharge, page 8). The drain which is not required should be tightly sealed. The condensate must be able to run off freely. The hose used for draining off condensate must be laid free from kinks and checked for correct drainage. Units with Basic and Comfort controllers are also equipped with a condensate alarm. Condensate hoses are available as accessories (refer also to the accessories section in the Rittal Catalogue) Leak detection If a leakage or pipe breakage occurs in the water circuit of the air/water heat exchanger, a magnetic valve immediately stops the cooling water supply and the floating change-over contact is activated. In the case of a unit with Comfort controller, the fan is also switched off. 3 Device description Basic controller: The system message IA appears in the display. Comfort controller: The system message A08 appears in the display Door limit switch (for units with Comfort controller only) Air/water heat exchangers with Comfort controller may be operated with a door limit switch connected. The door limit switch is not included with the supply (available as an accessory, Model No. PS ). The door limit switch function causes the fan and the magnetic valve in the air/water heat exchanger to be switched off after approximately 15 seconds when the enclosure door is opened (contacts 1 and 2 closed). This prevents the formation of condensation inside the enclosure while the enclosure door is open. The fan will start up after about 15 seconds on closure of the door. The connection is made at terminals 1 and 2. The extra-low voltage is supplied by the internal power pack; the current is approx. 30 ma DC. Note: The door limit switches must only be connected free from potential. No external voltages! Additional interface X3 (Comfort controller only) Note: The electrical signals at the interface are of an extra-low voltage (not extra-low safety voltages to ). An additional interface card may be connected to the 9-pole SUB-D connector X3 in order to incorporate the air/water heat exchanger into higher-level monitoring systems (available as an accessory, interface card Model No. SK ). 3.2 Proper use Rittal enclosure air/water heat exchangers were developed and designed in accordance with the state of the art and the recognised rules governing technical safety. Nevertheless, if used improperly, they may pose a threat to life and limb or cause damage to property. The unit is only intended for cooling enclosures. Any other use is deemed improper. The manufacturer will not be liable for any damages caused as a result of improper use, or for incorrect assembly, installation or use. All risk is borne solely by the user. Proper usage also includes the observation of all valid documents and compliance with the inspection and servicing conditions. Rittal air/water heat exchanger assembly and operating instructions 5 2ff7e9595c
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