Pfannenberg DTI 6201C User manual

Operating Manual
Attachment and installation cooling units
DTS and DTI Series 6201C / 6301C
Multi-Controller (MC) –230 V
Version 1.0, May 2017

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Preface
The skills and information provided in the ORIGINAL OPERATING MANUAL are required for assembly and safe
operation of Pfannenberg cooling units.
The information is presented in a brief, clearly arranged format. The chapters are numbered throughout. If you
have the operating manual in digital format, the links are interactive.
Various unit types are documented in this operating manual.
Pfannenberg cooling units are subject to continuous improvement. Please understand that we must reserve the
right to changes in 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.
A film on the DTI cooling units can be viewed HERE.
Safety instructions and markings
DANGER
Identifies an exceptionally dangerous situation. Severe, irreversible injuries or death will occur if this notice is
not observed.
DANGER
Identifies an exceptionally dangerous situation in connection with electrical voltage. Severe, irreversible injuries
or death will occur if this notice is not observed.
WARNING
Identifies an exceptionally dangerous situation. Severe, irreversible or deadly injuries could occur if this notice
is not observed.
CAUTION
Identifies a dangerous situation. Minor or moderate injuries could occur if this notice is not observed.
Before notices and explanations.
*Legend notice
 Placed before results of actions.

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Table of contents
1Intended use...................................................................................................................................................5
1.1 General overview...................................................................................................................................5
1.2 Permissible usage conditions................................................................................................................5
1.3 Duty of the operator...............................................................................................................................5
2Unit description..............................................................................................................................................6
2.1 Description of use..................................................................................................................................6
2.2 Scope of delivery ...................................................................................................................................6
2.3 Order options.........................................................................................................................................6
2.4 Functional description............................................................................................................................7
2.4.1 Air flow functional principle.............................................................................................................................. 7
2.4.2 Controller......................................................................................................................................................... 8
2.4.3 Refrigerant circuit functional principle.............................................................................................................. 9
2.4.4 Safety concept................................................................................................................................................. 9
2.4.5 Accumulation of condensate ......................................................................................................................... 10
2.4.6 Energy-saving mode...................................................................................................................................... 10
2.4.7 Multimaster function ...................................................................................................................................... 11
2.5 Type plate............................................................................................................................................12
2.6 Technical data......................................................................................................................................13
2.6.1 Refrigeration data.......................................................................................................................................... 13
2.6.1 Electrical data................................................................................................................................................ 13
2.6.2 Dimensions.................................................................................................................................................... 13
2.6.3 Other unit data............................................................................................................................................... 13
3Assembly and initial commissioning.........................................................................................................14
3.1 Transport..............................................................................................................................................14
3.2 Storage ................................................................................................................................................14
3.3 Unpacking............................................................................................................................................15
3.4 Assembly .............................................................................................................................................15
3.4.1 General assembly requirements.................................................................................................................... 16
3.4.2 Mounting M8 jack rings.................................................................................................................................. 16
3.4.3 DTS cooling unit assembly (side attachment) ............................................................................................... 17
3.4.4 DTI cooling unit assembly (installation)......................................................................................................... 19
3.5 Electrical connection............................................................................................................................21
3.5.1 Multi-Controller (MC) electrical circuit diagram.............................................................................................. 21
3.5.2 Multimaster connection.................................................................................................................................. 21
3.5.3 Door contact switch....................................................................................................................................... 22
3.5.4 Mains supply connection............................................................................................................................... 23
3.5.5 Adapting the upstream fuse /transformer options.......................................................................................... 25
3.5.6 Collective fault signal..................................................................................................................................... 25

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4Operation ......................................................................................................................................................26
4.1 General functions.................................................................................................................................26
4.2 Multi-Controller operation ....................................................................................................................27
4.3 Carrying out menu settings..................................................................................................................27
4.4 Operation of the cooling unit................................................................................................................29
4.5 Service interface..................................................................................................................................30
4.6 Error messages....................................................................................................................................31
4.7 LCD error messages............................................................................................................................34
5Service and Maintenance............................................................................................................................35
5.1. General cleaning..................................................................................................................................35
5.2 Cleaning the cooling unit - Unit cover removal....................................................................................36
5.3 Cooling unit and filter mat cleaning tasks............................................................................................37
5.4 Maintenance ........................................................................................................................................38
5.5 Maintenance checklist template...........................................................................................................39
5.6 Decommissioning ................................................................................................................................40
6Troubleshooting...........................................................................................................................................41
7Spare part orders / accessory orders........................................................................................................42
8Terms of warranty........................................................................................................................................42

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1 Intended use
1.1 General overview
The Pfannenberg attachment and installation cooling units of the DTS and DTI series are stationary cooling units
for the dissipation of heat from switch cabinets. They are available in two versions:
The DTI cooling units are partially recessed in the side or installed in the door.
The DTS cooling units are mounted on the side or on the door.
The cooling units have different cooling outputs. For exact watt specifications, see Technical data.
The cooling units have cut-out compatibility with air/air heat exchangers and air/water heat exchangers. Use of
aluminum filters, fleece filters and fluted filters is possible with an additional adapter.
The cooling units are available with different controllers. Cooling units are available with a standard controller (SC)
or a Multi-Controller (MC). These controllers are regulating units for the adjustment of refrigeration functions and
operating data. They also enable readouts of system messages and diagnostic data. The Multi-Controller (MC) is
also equipped with a Multimaster function and energy saving mode.
For detailed specifications for the controller, see Technical data, Electrical connection and System information.
All Pfannenberg cooling units are ROHS-compliant and free from:
•Silicone connections
•PCT, asbestos, formaldehyde, cadmium
•Moisture-impairing substances
1.2 Permissible usage conditions
•The permissible ambient air temperature range of DTI/DTS cooling units is +15°C (+59°F) to +55°C (+131°F).
•The permissible storage temperature of DTI/DTS cooling units must not exceed +70 °C (+158°F).
1.3 Duty of the operator
The operator must ensure that the cooling units are used exclusively as intended and dangers of all types to the life
and limb of users or third parties are avoided. In addition, accident prevention regulations and recognized safety
rules are to be observed.
The operator must ensure that all users have read and understood this operating manual.
Non-observance of this operating manual will void the warranty. The same applies if improper work has been
carried out on the unit by the customer and/or third parties without the approval of the manufacturer.

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2 Unit description
2.1 Description of use
Pfannenberg DTS and DTI series attachment and installation cooling units are designed to dissipate heat from
switch cabinets. Sensitive components in the switch cabinet are protected. Condensate arising during the cooling is
removed by an integrated system.
The cooling units operate with very low flammable refrigerant that is not harmful to the ozone layer.
2.2 Scope of delivery
The shipment consists of the following contents:
DTI/DTS cooling unit
Cooling unit quick guide
Accessory kit: Appropriate seal, fastening material, electrical plug connector, etc. for the specific unit type
Special accessories, if applicable
2.3 Order options
WARNING
Spare parts from third-party manufacturers can damage the unit
Only original parts are subject to the manufacturer's quality control.
Only use specially harmonized manufacturer parts for safe and reliable operation.
For Pfannenberg spare part numbers, see Spare part orders.
There is an optional expansion with a filter adapter for various filter mats (fleece filters, fluted filters and metal
filters).
For Pfannenberg part numbers for accessory orders, see Ordering of accessory parts.
WARNING
Danger due to impermissible use of units
Inappropriate use of the units can cause severe accidents.
Cooling units must only be used in stationary operation.
The DTI/DTS cooling units are only approved for stationary operation. As cooling units with protection rating IP 54,
the cooling units are essentially dust-protected. Limitation: Dust can still penetrate after continuous exposure. The
cooling units are resistant to spray water, but not a constant water jet.

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2.4 Functional description
2.4.1 Air flow functional principle
Item
Designation
Item
Designation
1
Ambient air outlet
2
Warm air inlet
3
Ambient air inlet
4
Cold air outlet
5
Switch cabinet
6
DTI unit cover
7
DTS unit cover
The upper part of the figures –Air flow principle front view –shows the DTI cooling unit and the lower part
shows a DTS cooling unit.
CAUTION
Danger due to the release of very warm air
The air outlet can become very warm depending on the ambient temperature.
Keep body parts away from the air outlet.
For the ambient temperature and air outlet ratio, see Technical data.
Figure 1 - DTS/DTI switch cabinet air flow principle
front view
Figure 2 - DTS/DTI switch cabinet air flow principle
side view
7
1
1
2
3
3
4
5
6
6
5
5
7
7
5

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2.4.2 Controller
Controllers are regulating units for the adjustment of refrigeration functions and operating data. They enable
readouts of system messages and diagnostic data. The controllers have a service interface which enables various
configurations. There is also a connection for collective fault indications.
Item
Control panel
Function
1
Green LED light
- Displays the operating mode:
Permanently illuminated = fault-free / blinking = operational fault
2
LCD (4-digit)
- Displays system information:
Temperature measuring unit, energy function, operating mode, system data,
error number and menu settings / menu items / menu level.
3
BACK button
- Activation of menu settings.
- Jump back to the next higher menu level.
4
SCROLL UP button
- SCROLL UP through the menu items or display elements in the current menu
level
5
SCROLL DOWN
button
- SCROLL DOWN through the menu items or display elements in the current
menu level
6
SET button
- Selection of the current menu item.
- Jump to the next lower menu level.
Cooling units with a multi-controller (MC) have a control panel with a green LED light (1) and an LCD (2). They are
located on the unit cover. Permanent illumination of the green LED light (1) while the mains voltage is connected
indicates fault-free operation. System information is displayed in the LCD. The following system information can be
displayed:
LCD
System information
Display –Temperature (°C/°F) of the regulating sensor in normal operating status.
Display –Stop mode execution. Door is open.
Alternating display with temperature and stop mode, with fault Er00. Display: StoP
Er00Temperature.
Display –Energy function execution, activated in energy saving mode
Alternating display with temperature display (°C/°F).
Display –Error number when a fault occurs.
In case of a fault, error number (Er01-Er15) is displayed alternating with
temperature (°C/°F). Exception, fault ER00: Display StoP Er00Temperature.
In case of an operating fault or a malfunction, the gray LED light (1) begins to blink and the LCD (2) displays error
numbers alternating with the temperature. For details, see Error messages .
1
2
5
4
6
3
Figure 3 - Multi-Controller (MC) control panel

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2.4.3 Refrigerant circuit functional principle
Item
Designation
Item
Designation
1
Compressor
2
Condenser
3
Expansion valve
4
Evaporator
5
Condenser fan (external)
6
Evaporator fan (internal)
7
Electronic control with temperature sensor
The cooling units are comprised of various components; see the figure Refrigerant circuit.
The compressor (1) compresses the refrigerant under high pressure. The temperature increases.
This heat is released to the ambient air in the condenser (2). The refrigerant liquefies.
The condenser fan (5) draws room air through the condenser (2) and releases it to the environment.
A pressure drop occurs when the refrigerant passes through the expansion valve (3).
Inside the evaporator (4), the refrigerant absorbs heat from the air inside the switch cabinet and evaporates.
The air inside the switch cabinet is cooled and dehumidified.
The evaporator fan (internal) (6) draws the air inside the switch cabinet through the evaporator (4) and releases
the cooled air back to the switch cabinet.
The cooling units are controlled with a temperature sensor (7). It detects the air temperature inside the switch
cabinet.
2.4.4 Safety concept
WARNING
Danger due to modified safety equipment
Non-functioning or defective safety equipment can cause severe accidents.
Any changes to the unit, particularly the safety equipment, are prohibited.
In case of defective safety equipment, shut down the unit and decommission it immediately.
•Cooling units have a pressure switch tested in accordance with EN 12263. It reacts to a pressure increase in the
refrigerant circuit by shutting off automatically.
•Fans and compressors are protected from overloading and overheating: e.g. the compressor is protected
against overclocking.
Additional protective functions (only cooling units with anti-freeze option):
If there is a risk of ice formation, switch off the compressor and the fans.
This shut-off function is not withdrawn until a system restart.
1
2
3
5
6
4
7
Figure 4 - Refrigerant circuit

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2.4.5 Accumulation of condensate
NOTE
Condensate flowing back into the switch cabinet can damage the electronic components
Internal temperatures below the dewpoint or damaged switch cabinet seals cause excessive accumulation of
condensate.
Regular inspection of the seals assures protection against heavy condensate accumulation.
Installation of a door contact switch reduces the accumulation of condensate when the switch cabinet is
open.
If the evaporator cools down, condensate can accumulate. In order to prevent damage to the switch cabinet and
the cooling units, the condensate is removed. The integrated condensate evaporator releases the condensate to
the environment. For safety reasons, there is a drain port with drain hose on the condensate evaporator.
Accumulating condensate is collected by a condensate collecting bottle. It is available as an accessory.
In case of questions about the cooling units or accessories and spare part orders, always specify the serial
number; see Spare part orders.
2.4.6 Energy-saving mode
Cooling units with Multi-Controller (MC) are equipped with energy-saving mode. Therefore, it has a second TS2
temperature sensor (1), which is installed externally on the cooling unit. The TS2 temperature sensor (1) monitors
the switch cabinet interior temperature.
In the condition as supplied, energy-saving mode is activated when cooling operation is not activated for 30
minutes. The LCD then displays energy function "EN", see system information
If the switch cabinet interior temperature increases above the adjusted temperature setpoint during active
operation, a cooling command is sent and energy saving mode is interrupted.
Cooling mode remains active until the temperature setpoint, minus hysteresis, has been reached. Energy-
saving mode always activates 30 minutes after the temperature setpoint is reached.
If the temperature setpoint is undercut by the external TS2 temperature sensor (1) in energy-saving mode, the
evaporator fan (internal) switches off. The temperature setpoint is measured minus hysteresis.
If the external TS2 temperature sensor (1) detects a temperature that exceeds the temperature setpoint, the
evaporator fan (internal) switches on. The value of the temperature setpoint is measured plus hysteresis.
If no fault occurs, the fault indication output is closed in energy saving mode.
1
Figure 5 –TS2- Temperature sensor

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2.4.7 Multimaster function
The Multimaster function can control up to six connected cooling units (bus functions). It regulates the cooling
mode as follows:
The first cooling unit that reaches the "TSet + 2K" switching threshold activates cooling mode in the bus
function.
The cooling mode is ended by the last unit that undercuts the switching threshold “TSet - 2K“.
Energy-saving mode is ended by the cooling command of one of the cooling units in bus function.
Energy-saving mode is re-activated 30 minutes (condition as supplied) after the last cooling command of one of
the cooling units in the bus function.
All cooling units in the bus function can activate or end cooling mode or energy-saving mode. There is no
"master and slave function".
For electrical connection, see Electrical connection.
Figure 6 –Multimaster control

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2.5 Type plate
WARNING
Danger due to damage of units
Disregarding type plate specifications can result in severe accidents.
Always observe the specifications on the type plate when installing and maintaining the units.
The type plate is located on the rear side of the cooling unit housing.
The figure shows the standard version for EU Member States. The type plate version may differ in other
countries.
Item
Designation
Item
Designation
1
Frequency
2
QR code
3
Options
4
CE mark
5
Protection type
6
Protection
7
Cooling capacity
8
Coolant pressure
9
Power rating
10
Coolant
11
Protection type
12
Exterior / interior ambient conditions
13
Start-up current
14
Nominal current (UL 60 HZ)
15
Nominal current
16
Serial number
17
Part number
18
Unit type
19
Manufacturer logo
20
Rated operating voltage
1
2
5
6
7
8
9
10
12
11
14
13
15
16
18
19
17
3
4
20
Figure 7 - Type plate for EU Member States
11

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2.6 Technical data
2.6.1 Refrigeration data
Designation
Model DTI/DTS 6201C
Model DTI/DTS 6301C
Cooling capacity A35 / A35 * / **
Q 0
1000 W
1500 W
Cooling capacity A50 / A35 * / **
Q 0
590 W
850 W
Refrigerant type *
R 134a
Refrigerant quantity *
500 g
Temperature setpoint (factory setting)
+35°C (+95°F)
Fault indication: Switch cabinet interior
temperature (factory setting)
> +50°C (+122°F)
Ambient air temperature
+15°C (+59°F) bis +55°C (+131°F)
Switch cabinet interior temperature
+25°C (+77°F) bis +45°C (+113°F)
Air volume flow, exterior circuit
885 m³/h
Air volume flow, interior circuit
885 m³/h
Condensate separation
Condensate evaporator
2.6.1 Electrical data
Designation
Model DTI/DTS 6201C
Model DTI/DTS 6301C
Rated operating voltage */ ****
230 V
Rated frequency *
50 / 60 Hz
Functional range
DIN IEC 60038
50 Hz
60 Hz
50 Hz
60 Hz
Power consumption *
P el
A35/A35
445 W
560 W
705 W
820 W
Rated current*
I nom max
2,04 A
2,9 A
5 A
5,2 A
Starting current*
I Start max
9,1 A
16 A
2.6.2 Dimensions
Designation
Model DTI/DTS 6201C
Model DTI/DTS 6301C
Height DTS
968 mm
Height DTI
962 mm
Width
410 mm
Depth with cover (standard)
253 mm
Installation depth DTI
60 mm
Weight
DTI: 40 kg / DTS: 41 kg
DTI: 44 kg / DTS: 45 kg
Installation attitude
Vertical
Unit construction
Standard: Steel
2.6.3 Other unit data
Designation
Model DTI/DTS 6201C
Model DTI/DTS 6301C
Anti-corrosion protection
Standard: Galvanized, electrostatic powder-coated (200°C)
Variant: Stainless steel cover
Protection type
When used as intended:
IP 54 against the switch cabinet (EN 60529).
IP 34 against the environment (EN 60529).
*Data on the type plate. ** Use of optional filter mats reduces the cooling capacity.
*** Max. rated current UL at 60 Hz. **** With a change to the rated operating voltage, adapt the
upstream fuse; see Adapting the upstream fuse .

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3 Assembly and initial commissioning
3.1 Transport
WARNING
Danger due to uncontrolled movements
Improper securing of the unit can result in severe accidents.
Loading must only be carried out by trained, qualified personnel.
Lash the unit correctly for transport on a truck or trailer.
Only use lashing straps with an adequate rated strength.
Use slip-resistant materials for securing, e.g. anti-slip mats.
When loading by crane, do not walk or stand under the raised units.
NOTE
Danger of material damage during transport and setting down of the units.
Improper device securing or uncontrolled movements can cause damage.
Exercise maximum caution during movement and transport of the units.
Always transport the unit in the position of use.
Always transport the cooling units using the packaging provided by the factory. It comprises an outer carton, base
plate and padding at the top and base.
Transporting cooling units
Requirements
- Cooling units must be in the packaging provided by the factory.
Required tools and material
- Lashing straps, loading crane, if applicable
Procedure
Secure correctly for transport with lashing straps. Always transport in the position of use.
Always raise cooling units by the housing.
Always raise cooling units slowly and evenly and set down safely.
 The cooling unit was transported and loaded correctly.
The cooling unit can also be loaded using M8 jack rings; for this purpose, the M8 jack rings are first screwed
into the cooling unit; see Mounting M8 jack ring.
3.2 Storage
•Do not expose the cooling unit to temperatures above +70 °C during storage.
•Always store the cooling unit in the position of use.
The warranty will no longer apply if these instructions are not observed.

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3.3 Unpacking
WARNING
Danger 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.
Also secure assembled components.
CAUTION
Danger of injury due to sharp edges
For manufacturing reasons, the metal edges of the unit may have burrs.
Wear gloves during service and assembly work.
Perform a visual inspection for transport damage when unpacking the cooling units. Take note of any loose
parts, dents, scratches, visible loss of oil etc.
Inspect and secure the packaging material for any loose functional parts before disposal.
Report any damages to the freight carrier immediately. Observe the "Terms for Cases of Damage".
Precise information about defects, including possible photos must be provided for the handling of warranty
claims. Always specify the type designation and serial number.
The "General Terms for Deliveries and Services" of ZVEI (Zentralverband der Elektrotechnischen Industrie;
Central Association of the Electrical Engineering and Electronics Industry in Germany) according to the latest
revision apply.
3.4 Assembly
DANGER
Life-threatening danger due to electric shock
Live units and exposed connection cables can generate an electric shock and cause severe accidents.
Work on electrical connections must be carried out exclusively by trained, qualified electricians.
Before assembly, de-energize all supply lines to the separate fuse or a main switch, disconnect the system
and secure to prevent re-connection.
Test to ensure the absence of voltage on the unit.
CAUTION
Danger of crushing during assembly of the unit
There is a danger of crushing between the switch cabinet and frame of the unit during assembly.
Keep body parts out of the space between the frame and unit cut-out.
Work carefully and wear gloves.
NOTE
Switch cabinet installation hazard due to assembly chips
When making the cooling unit cut-outs, assembly chips can fall into the switch cabinet.
When assembling the switch cabinet, protect against contaminants and use protective covers.

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3.4.1 General assembly requirements
The following general requirements must be followed for safe and reliable operation of the cooling units:
Select an assembly location for the switch cabinet which will guarantee adequate ventilation of the cooling unit.
A minimum clearance of 200 mm between units and the nearest wall must be observed.
Installed components in the switch cabinet must not impede air circulation.
Secure the switch cabinet against tipping.
Ensure that provided hinges can support the additional weight of the cooling unit.
The cooling unit can be assembled with and without an external unit cover.
Protect the installation location from heavy contamination with covers.
3.4.2 Mounting M8 jack rings
WARNING
Danger of accidents due to unapproved crane transport
Movement of switch cabinets with integrated cooling units can result in accidents.
Only lifting by M8 jack rings is permitted for the cooling unit.
Ensure that jack rings and unit threads are not damaged or deformed.
Only use jack rings with an adequate thread length and ensure that they are securely seated.
The cooling units have threads for M8 jack ring installation. M8 jack rings can be installed in cooling units for crane
transport.
Item
Designation
Item
Designation
1
DTS cooling unit M8 jack rings
2
Unit cover screws
Requirements
- The factory-provided packaging has been removed from the cooling units.
- Observe the minimum screw depth of the M8 jack rings.
- M8 jack rings and cooling unit threads must be free from damage (corrosion and deformation).
- The unit cover screws (2) have been removed.
Procedure
Screw in the two M8 jack rings (1) completely with the appropriate thread depth.
Check to ensure the proper seating of the M8 jack rings in the cooling unit.
 The M8 jack rings are screwed in the cooling unit and the unit can be moved.
Figure 8 - DTI/DTS cooling unit M8 jack rings
1
1
2

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3.4.3 DTS cooling unit assembly (side attachment)
Item
Designation
Item
Designation
1
Holes
2
Device contour
3
Cut-out
Make cut-out for the DTS cooling unit
Requirements
- All general requirements have been fulfilled; see General assembly requirements
- The unit is de-energized.
Required tools and material
- Saw
- Use a switch cabinet cutter, if applicable
- Protective covers
Procedure
Use a protective cover to protect the switch cabinet from chips.
Provide the switch cabinet with cut-out (3) and holes (1). For the prescribed dimensions, refer to the figure
exterior view of the switch cabinet.
Deburr the cut edges.
Remove chips and assembly waste from the switch cabinet.
Cut-out and holes have been made.
Figure 9 - Switch cabinet exterior view
Holes for DTS cooling unit
Figure 10 - Switch cabinet exterior view
Cut-out for DTS cooling unit
1
1
3
2

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Install profile seal on the DTS cooling unit (side attachment)
WARNING
Danger of accidents due to incorrectly installed seals
Leaky seals can allow moisture to penetrate and cause short-circuits.
Install the seal so that it provides a tight seal to the switch cabinet.
Always inspect seals during cleaning and maintenance.
Item
Designation
Item
Designation
1
Profile seal
2
Cut-out for seals
3
Switch cabinet interior fastenings
4
Profile seal slotted ends
Install profile seals and assemble
Requirements
-Cut-out for the DTS cooling unit have been made; see figure DTS cooling unit assembly (side attachment).
- The cooling unit is de-energized.
Required tools and material
- Profile seal (1)
- Installation tool
- Accessory kit: Threaded bolts, screws, nuts, washers
Procedure
Insert profile seals (1) on the sheet metal edge of the cut-outs (2). Fit the seals with the slotted ends (4) down.
Screw in the two supplied threaded bolts (accessory kit) in the upper fastening points of the DTS cooling unit.
Suspend the cooling unit on the switch cabinet with the threaded bolts installed from outside.
Tighten the screws on the DTS cooling unit on the switch cabinet interior (3). Use the supplied screws, nuts and
washers (accessory kit) to fasten the unit. Firmly tighten the screw fasteners so that the profile seal is pressed
together to a thickness of 2 mm.
 The DTS cooling unit is attached to the switch cabinet and ready for electrical connection;
see Electrical connection.
Figure 11 –Install profile seal
DTS cooling unit (side attachment)
1
2
3
4

Operating Manual DTS and DTI 6201C / 6301C Multi-Controller (MC) 086100016 © Pfannenberg GmbH Page 19 / 43
GB
3.4.4 DTI cooling unit assembly (installation)
Item
Designation
Item
Designation
1
Air inlet
2
Air outlet
3
Device contour
Make cut-outs for the DTI cooling unit
Requirements
- All general requirements have been fulfilled; see General assembly requirements
- The unit is de-energized.
Required tools and material
- Saw
- Use a switch cabinet cutter, if applicable
- Protective covers
Procedure
Use a protective cover to protect the switch cabinet from chips.
Provide the switch cabinet with cut-outs. For the prescribed dimensions, refer to the figure switch cabinet
exterior view.
The four corner cut-outs can be rectangular or have a maximum R = 4 mm.
Deburr the cut edges.
Remove chips and assembly waste from the switch cabinet.
Cut-outs have been made.
Figure 12 - Switch cabinet exterior view
DTI cooling unit cut-outs
1
2
3

Operating Manual DTS and DTI 6201C / 6301C Multi-Controller (MC) 086100016 © Pfannenberg GmbH Page 20 / 43
GB
DTI cooling unit switch cabinet assembly (installation)
Item
Designation
Item
Designation
1
Catch spring
2
Fastening spring (top)
3
DTI cooling unit
4 A
Housing - cut-out
4 B
Housing - cut-out
5
Fastening spring (bottom)
6
Switch cabinet wall / switch cabinet door
The film for DTI cooling units with assembly instructions is available HERE.
Switch cabinet assembly
Requirements
- The cut-out for the DTI cooling unit has been made; see the figure DTI cooling unit assembly.
- The cooling unit is de-energized.
Required tools and material
- Assembly tool, fastening springs (2)/(5) (accessory kit)
Procedure
Fit the cooling unit (3) in the cut-out from outside; see the figure DTI cooling unit assembly.
Push the cooling unit (3) into the switch cabinet (6) until the unit seal is applied.
The catch spring (1) on the top side of the unit audibly engages. The cooling unit (3) is now secured from falling
out.
Engage the fastening springs (2)/(5) on the inside of the switch cabinet (6).
Press the fastening springs in with your hand so that the retaining bracket engages in the housing cutout (4 A).
Use the fastening springs in the rear housing cut-outs (4B) for switch cabinets with reinforcement frame.
Mount the cooling unit (3) so that the emergency condensate drain is arranged at the bottom of the unit.
The DTI cooling unit is attached to the switch cabinet and ready for Electrical connection.
2
3
4 A
1
6
4 B
5
Figure13 –DTI cooling unit assembly