1 Hints on the manual This handbook contains instructions for the installation and operation of door or side-mounted, bolt-on Cooling Units provided by Pfannenberg. In this manual, safety recommendations and other information are structured as follows. If the measures described in the following are not strictly observed there is danger to life and health.
Any damage must be reported immediately to the forwarding agent ). Moreover, the latest edition of the "Pfannenberg After Sales Service Declaration" shall apply. •Before disposing of packing material ensure that it does not contain any loose components. Burr caused by production may be present on the metal edges of the unit. Always wear protective gloves when carrying out maintenance work and installation.
6 Safety Cooling units produced by Pfannenberg are designed for use in dissipating heat from switch cabinets (IP 54). The cooling unit is only suitable for installing on the stationary operation. Only the authorized specialist can work on the cooling system and electrical components.
7.2 Operating principles The compressor (1) compresses the refrigerant until high pressure is achieved. During this process temperature increases. In the condenser (2) heat is dissipated to ambient air, the coolant becoming liquid. The condenser fan (5) takes ambient air in through the condenser, and then it releases the air.In the expansion valve (3) the pressure of the coolant drops.
8 Technical data 8.1 Circuit Diagram (230V/400V 2~ Circuit Diagram) Capacitors-condenser fan Compressor Condenser fan Capacitors-evaporator fan Evaporator fan Capacitors-compressor Temperature sensor Condensate evaporation Sub terminal Fuse Earthing connection Overheat protector Connection mains Operating indicator Connection failure indication + door contact Option high pressurestat 685408021C...
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(400V 3~Circuit Diagram) 3-phase voltage monitoring relay Capacitors-condenser fan Capacitors-evaporator fan Compressor Condenser fan Capacitors-compressor Evaporator fan Condensate evaporati o n Control transformer Fuse Temperature sensor Operating indicator Sub terminal 1/ 2/ 3/ 4/ 5 Earthing connection 4 / 42 Connection mains Connection failure indication + door contact Contact...
8.2 Spare parts Please order your spare parts only with the Pfannenberg-parts-number. DTS 8021E DTS 8031E DTS 8241E DTS 8341E Spare parts 18861100025 18861100017 18861100019 18861100020 Internal fan 18861100026 18861100018 18861100020 18861100020 External fan 18860200022 18860200014 18860200015 18860200015 Cover (RAL7035)
8.4 Airflow principle Read this manual completely and carefully before installing the unit. Prior to mounting, ensure that the clearance of the units to each other and to the wall is at least 200mm; air inlet and outlet are not obstructed on the inside of the enclosure. 685408021C...
8.5 Technical Data Cooling data DTS 8021E Cooling capacity at A35/A35 * 300 / 320 W Cooling capacity at A50/A35 * 150 / 170 W Refrigerant type * R 134a Refrigerant amount * 120 g Internal setting temerature (factory setting) +35°...
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Cooling data DTS 8031E /55 W Cooling capacity at A35/A35 * 33 /363 W Cooling capacity at A50/A35 * 134a Refrigerant type * 19 g Refrigerant amount * +35°C (+95°F) Internal setting temerature (factory setting) > +5 °C (+122°F) High temperature alarm (factory setting) +15°C (+59°F) .
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Cooling Data DTS 8241E Cooling capacity at A35/A35 * 84 /923 W Cooling capacity at A50/A35 * 134a Refrigerant type * 43 g Refrigerant amount * +35°C (+95°F) Internal setting temerature (factory setting) > +5 °C (+122°F) High temperature alarm (factory setting) +15°C (+59°F) .
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Cooling data DTS 8341E /165 W Cooling capacity at A35/A35 * /99 W Cooling capacity at A50/A35 * 134a Refrigerant type * 43 g Refrigerant amount * +35°C (+95°F) Internal setting temerature (factory setting) > +5 °C (+122°F) High temperature alarm (factory setting) +15°C (+59°F) .
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Cooling data DTS 8441E /214 W Cooling capacity at A35/A35 * /1498 W Cooling capacity at A50/A35 * 134a Refrigerant type * 85 g Refrigerant amount * +35°C (+95°F) Internal setting temerature (factory setting) > +5 °C (+122°F) High temperature alarm (factory setting) +15°C (+59°F) .
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Cooling data DTS 8541E /2675 W Cooling capacity at A35/A35 * /1926 W Cooling capacity at A50/A35 * 134a Refrigerant type * Refrigerant amount * +35°C (+95°F) Internal setting temerature (factory setting) > +5 °C (+122°F) High temperature alarm (factory setting) +15°C (+59°F) .
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Cooling data DTS 8841E Cooling capacity at A35/A35 * Cooling capacity at A50/A35 * 134a Refrigerant type * Refrigerant amount * +35°C (+95°F) Internal setting temerature (factory setting) > +5 °C (+122°F) High temperature alarm (factory setting) +15°C (+59°F) . . . +55°C (+131°F) Ambient air temperature +25°C (+77°F) .
9 Installations 9.1 General •For effective cooling & ventilation , correct installation & ventilation of the cooling unit is very important. •The distance must be kept at least 200mm between units or the unit to the wall. •The cooling unit’s electrical connection terminal requires at least 40mm space and the electrical components shall not impede air circulation in the internal cabinet.
1 Cooling unit DTS 5 springs shim 2 switch cabinet wall or door 6 nuts 3 thread rod 7 bolts 4 flat gasket 8,9,10,11,12 sealing strip 5) If M8 bolts on the top of unit being removed during insatallation, rescew them back to the unit tightly after installation.
The cooling unit may be damaged if the voltage is too high. It’s nominal voltage is 230V or 400V. 10 Operating condition •The voltage must be within ± 1 % of the value indicated. •The frequency must be within ±3 z of the value indicated. •Ambient temperature must be below 55℃.
11.3 Start-up / Test mode The cooling unit does not work if the door switch is open. Each time the unit is power-on (when the door switch is closed), the unit performs a start-up process lasting around 1 seconds which is followed by a test mode lasting around 1 5 seconds.
The contact may be loaded with max23 , 1A 12 Parameters View and Settings Parameters of cooling unit can be monitored and set via operation display. •Cooling unit control system includes control board, operation display. Sign Description ighting emark Self-check Self-check Available Operation Display...
13 Cleaning and Maintenance lease cut off the cooling unit’s power before carrying out any cleaning or maintenance operation. 13.1 Cleaning The operation efficiency and reliability of the equipment will be improved by periodic cleaning and maitenance, call our service team for further service cooperation. ay special attention to the following instructions: •Use a soft brush or compressed air (Medium pressure to avoid damage to the fins).
15 Trouble shooting In spite of careful maintenance, the equipment may still have a failure sometime in the future. The real-time self-check function can diagnose the failure. If a fault occurs, the display will show the relevant alarm code, Below is the trouble shooting guide . Alarm codes list: Alarm code Description Trouble shooting method...
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send the unit freight prepaid and covered by an adequate transport insurance. Observe the hints on transport mentioned in section 2 Appendix I Shown parameters (operation display) Parameter Description Min. Max. Default Unit ℃ Temperature of internal return air (measurable range) ℃...
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