Related Manuals for Pfannenberg DHS 3000 Series
Summary of Contents for Pfannenberg DHS 3000 Series
- Page 1 Technical Manual Operation and installation hybrid cooling units DHS 3000 HYBRID-SERIES 885505103 Rev 01 March 18, 2025...
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Page 2: Safety Instructions And Symbols
Pfannenberg cooling units are subject to continuous improvement. Please understand that we reserve the right to make changes to the design, equipment and technology. For this reason, no claims to specific features of the unit can be derived from the content of this operating manual. -
Page 3: Table Of Contents
Table of contents 1 : INTENDED USE General overview ............................Duty of the operator ............................. 2 : UNIT DESCRIPTION Description of use............................Scope of delivery ............................Unit Description ............................2.3.1 Physical Layout ............................ 2.3.2 Temperature Regulation ........................2.3.3 Refrigeration Circuit ..........................2.3.4 Safety Concept ............................ -
Page 4: Intended Use
1 : INTENDED USE 1.1 General Overview The attachment and installation of the Pfannenberg DHS series cooling units are intended as stationary cooling units for the dissipation of heat from switch cabinets. NOT TO BE ACCESSIBLE TO THE GENERAL PUBLIC. -
Page 5: Unit Description
• Cooling units must only be used in stationary operation. Pfannenberg DHS series cooling units are designed to dissipate heat from switch cabinets. with intention to maintain the air temperature inside the switch cabinet to allow for normal operation of sensitive components in the switch cabinet. - Page 6 Description Image QTY. Flat washer M6XØ18mm Slotted grub screw M6x30mm 10mm Hex nut M6 Eye bolt M8 Hose clip 17-18,5mm PVC clear hose 12x2mm 260mm Power connector (X50) (115/230V) / (400/460V) Alarm connector (X12) Page 6 Return To Table Of Contents OPERATING MANUAL DHS...
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Page 7: Unit Description
2.3 Unit Description Unit cover Condensate evaporation tray w/ drain Display / control interface (LP2) High pressure switch Condenser outlet Evaporator fan Condenser fan Connection compartment with cover Passive cooling coil Evaporator (internal) Condenser Cool air outlet Compressor Pre-installed gasket CAUTION Danger due to the release of very warm air. -
Page 8: Temperature Regulation
2.3.2 Temperature Regulation The display is for the adjustment of refrigeration functions, operating data, as well as alarm and error codes. The actual temperature of the enclosure side will be displayed while the cooling unit is in normal operation. Use the up and down arrows to scroll through the parameter options. - Page 9 Display Functions Parameter Display read out Description Live Temperature measured by the sensor used to manage the Actual Temperature TEMP device functionality. Setpoint SETP Shows the configured setpoint temperature Shows the configured high temperature alarm level High Temp Alarm MaxA - minimum setting: default: 42.0°C - maximum setting: default: 69.0°C Shows the configured low temperature alarm level...
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Page 10: Refrigeration Circuit
2.3.3 Refrigeration Circuit The following lays out the active refrigeration circuit within the DHS cooling unit The following lays out the active refrigeration circuit within the DHS cooling unit. Condenser Temperature sensor Display Interface Filter drier Evaporator fan High pressure switch Expansion valve Compressor Condenser fan... -
Page 11: Type Plate
2.5 Type Plate This figure shows the standard version of type plate. Item Number Designation Item Number Description Manufacturer logo Refrigerant type and weight Unit type Global Warming Potential Part number CO2 equivalent value Serial number CE Mark Rated operating voltage & frequency UL Mark Current Ratings QR code to website... - Page 12 Further Explanation of Type Plate Field Designation Explanation Criteria for the power supply that must be connected to the unit by the Rated operating voltage & frequency customer. Inom max: Amperage pull of the cooling unit as a whole at maximum rated Current ratings ambient condition.
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Page 13: Technical Data And Spare Parts
2.5 Technical Data and Spare Parts Technical data, spare parts, and cutouts can be found on our website here: http://pfannenbergusa.com/thermal-management-downloads/ Cooling Data DHS 34x1 Series Cooling capacity (Q0) A35°C(95°F)/A35°C(95°F) 2100 W / 7165 BTU/h Cooling capacity (Q0) A50°C(122°F)/A40°C(104°F) 1540 W / 5254 BTU/h Refrigerant type Active Cooling System Passive Cooling Coil... -
Page 14: Assembly And Initial Commissioning
3 : ASSEMBLY AND INITIAL COMMISSIONING Safety Information DANGER Danger of fatal injury due to electric shock • Parts may be under voltage when the unit is opened and can cause an electric shock if touched. • Observe the following points when working on the open unit: •... -
Page 15: Storage
3.1 Storage • Do not expose the cooling unit to temperatures below -40°C or above +70 °C during storage*. • Unit must be in the upright position. • The warranty will no longer apply if these instructions are not observed. 3.2 Transport WARNING Hazards due to uncontrolled movements... -
Page 16: Unpacking
3.3 Unpacking WARNING Hazard of accidents due to the heavy weight of the units Uncontrolled movements of the units during assembly can cause accidents. • Use suitable lifting equipment and secure units to prevent accidents. • Secure assembled components. CAUTION Hazard of injury due to sharp edges •... -
Page 17: Assembly
Crane transport: DANGER Danger to life due to suspended loads Tipping or falling loads can cause severe to fatal injuries • Never stand beneath suspended loads. • Only use approved lifting gear and slings which are designed for the total weight of the attached load. •... -
Page 18: General Assembly Requirements
• If ducting is used, contact Pfannenberg for information. • Installed location should not be accessible to the general public. - Page 19 DHS COOLING UNIT INSTALLATION REQUIRED TOOLS AND MATERIAL PROCEDURE • Screw in the two supplied threaded bolts (accessory kit) in the upper fastening points of the DTS cooling unit • Follow crane lift instructions for eye bolts, or team lift into position.
- Page 20 CONDENSATE DRAIN HOSE INSTALLATION NOTICE Unit comes standard with an active condensate management system which collect and burn-off normal amount of condensation. In situation where excessive condensation is formed condensate may drain from unit and cause slippery conditions. • Be sure to install condensate drain tube to collect or manage water draining from unit. •...
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Page 21: Electrical Connection
3.5 Electrical Connection 3.5.1 Main supply connection DANGER Danger of fatal injury due to electric shock! • Work on electrical connections must be carried out exclusively by trained, qualified electricians • Equipment grounding must be provided in accordance with NFPA 79 chapter 8.2 or DIN EN 60204-1, chapter 8.2. •... - Page 22 Electrical connection of the cooling unit The device corresponds to overvoltage category II. Follow these general requirements to ensure safe and reliable operation of the cooling unit: • Connection of an upstream temperature control on the feed side is prohibited. •...
- Page 23 DANGER Life-threatening hazard due to electric shock Live units and exposed connection cables can generate an electric shock hazard and cause severe accidents. • Work on electrical connections must be carried out exclusively by trained, qualified electricians. • Ensure that the unit is voltage-free before routing all electrical connections. Circuit Diagram Legend 1CAP Compressor run capacitor...
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Page 24: Door Contact Switch
3.5.2 Door Contact Switch WARNING Hazard due to connection of external voltage at the input of the door contact External voltage can cause severe accidents. • Connection of external voltage to the input for the door cabinet will cause damage to the unit. •... -
Page 25: Alarm Relay
Alarm Relay The unit is equipped with a potential-free changeover contact for the collective fault signal. Three connections are provided for connecting the collective fault signal. The alarm relay is accessible through the four po- sition X12 connector included with the access pack. The X12 port consists of a common input rated up to 5A 230V normally closed output and a normally open output. -
Page 26: Operation
4 : OPERATION 4.1 General Functions NOTICE Danger of damage to the cooling unit Operation without the unit cover prevents the adequate supply of air to the condenser, and limits stated capacity. • Only operate the cooling unit with the unit cover installed. •... -
Page 27: Display Interface Overview
Display Interface Menu Overview The display interface has five menu options with adjustable parameters. Follow this navigation. The temperature of the air getting pulled in by the internal fan is displayed during normal operation The setpoint at which the unit will cool to can be adjusted. Active cooling will be triggered when this value is overtaken by 2°C. Change Value The maximum temperature alarm of the enclosure can be adjusted. -
Page 28: Service And Maintenance
Schedule”. Shorter maintenance intervals are required for cooling units exposed to ambient air containing oil and dust. A shorter guide value of two to six months applies these cases. • Pfannenberg add-on filters are designed to fit the cooling unit and have a positive effect on the scope of cleaning maintenance. 5.2 Safety information... -
Page 29: Maintenance Checklist Template
5.3 Maintenance checklist template Cooling Unit Maintenance Checklist Type: Maintenance Interval: • Conduct maintenance every twelve months. Serial number: • Conduct maintenance every two to six months Date of maintenance: in oil and dust-laden environmental air. Technician: Unit range designation/ Visual To Do Result... -
Page 30: Removing Cover
5.4 Removing and Installing Cover WARNING Hazard due to improper maintenance work Damage of components and faulty replacement of components can cause accidents. • Always switch off the disconnector/contactor before beginning maintenance work. • Wait For unloading phase of 5 minutes for the electric components, to open unit cover. •... -
Page 31: Troubleshooting
6 : TROUBLESHOOTING General NOTE: Flashing of the red LED light on the controller card is not a fault indication or error message. The red LED light indicates that the cooling unit is carrying voltage Fault Possible causes Corrective measures Unit does not cool;... -
Page 32: Display Error Codes
6.1 : DISPLAY STATUS CODES Display Error Codes Display Code Name Description Corresponding Controller Port / Circuit Door contact circuit is Door open Refrigerant high pressure High Pressure safety switch has opened Temperature sensor Temp sensor 1 open. Need control failure board replacement. -
Page 33: Spare Parts & Accessories
Spare parts from third-party manufacturers can damage the unit and cause accidents. • Only original parts are subject to the manufacturer’s quality control. • Only use specially agreed manufacturer parts for safe and reliable operation. Note: Always specify the Pfannenberg part numbers when ordering spare parts and accessory parts. Description Description... -
Page 34: Dismantling & Disposal
• Refrigerant must be professionally extracted from the refrigerant system. Avoid refrigerant emissions. • The cooling unit must only be disposed of by authorized, qualified personnel. • Waste equipment can be disposed of correctly by Pfannenberg. Freight charges for delivery to one of our manufacturing facilities must be pre-paid. -
Page 35: Safety Information
9.3 Safety Information All work may only be performed by persons with certified qualifications under consideration of: • the minimum qualification • this manual • the valid local regulations and laws • company-internal work, operation and safety regulations Use the necessary personal protective equipment for the respective activity for all work. Risk of cutting and injury! CAUTION Risk of cutting and injury due to production-related, sharp sheet metal edges on the unit. -
Page 36: Disposal
885505103 Rev 01 All information contained was thoroughly checked in 2025. © 2025 Pfannenberg Incorporated However, we make no guarantee as to the completeness and correctness of the specifications. Page 36 Return To Table Of Contents OPERATING MANUAL DHS...
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