Riedel GEKN 600 User manual

Installation and Operation Manual for Refrigeration Units
Standard cooling
GEKN 600
GEKN 900
GEKN 1200
GEKN 1500
GEKN 2001
GEKN 3001
Extra-low
temperature cooling
GEKT 501
GEKT 701
GEKT 1001
GEKT 1201
GEKT 1501
Riedel refrigeration units, made by Günter
with exclusive Bosch service support
-1- Status as of 08/2008
GEK...-H / ..-W / ..SP
GEK...-D
Unit for Ceiling mounting
GEK...-H /..-S
Piggyback / Split model
The units GEKN 600, 900, 1200, 1500, 2001, and 3001 are suitable for installation in rooms with
a desired temperature range of +12°C to -5°C.
The unit models GEKN 501, 701, 1001, 1201, and 1501, are suitable for installation in rooms
with a desired temperature range of -5°C to -25°C.

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Table of Contents
Table of Contents............................................................................................................................................................................. 2
1) Security instructions and important stipulations.......................................................................................................................... 3
2) Unpacking and handling.............................................................................................................................................................. 3
3) Installation information ............................................................................................................................................................... 4
4) Initial operation............................................................................................................................................................................ 6
5) Accessory Connecting Cable For Split Systems.......................................................................................................................... 7
6) Refrigeration controller for standard units................................................................................................................................... 8
7) Refrigeration controller for units with remote control............................................................................................................... 11
8) Technical data............................................................................................................................................................................ 15
9) Stopping operation of the refrigeration unit .............................................................................................................................. 16
10) Energy saving instructions....................................................................................................................................................... 16
11) Cleaning and maintenance....................................................................................................................................................... 16
12) Causes for malfunction............................................................................................................................................................ 17
13) Refrigeration cycle diagram .................................................................................................................................................... 18
14) Wiring Diagramm.................................................................................................................................................................... 19
15) Dimensions sheets ................................................................................................................................................................... 27
16) Accessory tubing for split systems .......................................................................................................................................... 31
17) Spare parts GEK..-H,..-S ......................................................................................................................................................... 32
18) SPARE PARTS GEK.. – DF................................................................................................................................................... 33
19) EG – Declaration Of Confrmity .............................................................................................................................................. 34
20) Service..................................................................................................................................................................................... 35

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1) Security instructions and important stipulations
For valuable refrigerated goods and/or extended absences, we recommend taking
appropriate measures for remote failure indication.
Please read the instruction manual carefully before installation and operation.
The relevant standards have been upheld and documented in the CE EG-conformity declaration.
Disposal of old appliances
Worn out units should be immediately rendered unusable. Disconnect the power plug and
connecting cable.
Refrigeration units contain refrigerants and oils that require professional disposal.
They also contain valuable substances that should be recycled.
Therefore, please use your local waste management point for proper disposal.
Please ensure that the tubing is not damaged until proper, ecologically friendly disposal can
be done.
Disposal of new appliance packaging
All packaging materials are environmentally friendly and recyclable.
The cardboard is comprised of 80% to 100% recovered paper. The plastics are made of
polyethylene (PE), and the straps are polypropylene (PP). The padding elements are CFC-
free and made of foam polystyrene (PS). These materials are pure hydrocarbon compounds
and recyclable.
You will find addresses for such materials centers at your municipal administration. Please
contribute to ensuring ecologically friendly disposal and/or recycling.
2) Unpacking and handling
The unit must only be transported in its operating position.
When unpacking the refrigeration unit, examine it carefully to determine if any damages were
incurred during transportation.
Please pay attention to any loose parts, dents, scratches, visible loss of oil, etc.
Any damages must be reported to the forwarding agent at once.
Before the packaging material is disposed of, make sure that no loose
functional items are still found within.
Before processing guarantee claims, we request an exact description of the defect and
information as to the type code and serial number of the unit.

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3) Installation information
- The installation room must be well ventilated.
- For usage in ambient temperatures of under 10°C, we recommend a winter controller
(optional equipment). For usage in ambient temperatures higher than 35°C, select the "High
Temperature Model" (Unit GEK….1). The permissible ambient temperature for this model is
45°C.
- Adequate free space must be available (see dimensions sheets) for the intake and exhaust
vents openings of the refrigeration unit.
- Before the unit is mounted, the carrying capacity of the cold room needs to be checked. The
net weight of the integrated refrigeration unit is listed in the technical information.
- Installation, repairs or alterations may only be performed by a specialized company.
- Standard units are drip-proof (protection class IP 23) and therefore suitable for interior
installation. Outdoor installation requires the use of accessory components.
- Refrigeration units in storage must be protected from moisture.
- For ambient conditions that vary, we ask you to consult us.
- The units are maintenance free. The ventilation slits and heat exchanger fins should be
examined regularly. Any visible dirt must be removed by cleaning, either by using a vacuum
cleaner or compressed air. If frost formation occurs, the manual de-frost process must
be performed.
Saddle Installation
- Create the recesses with the help of the enclosed template or according to the dimension
diagram pg. 27 in the instruction manual.
- Lower the refrigeration unit.
- Attach the bracket to the inner wall of the cell according to the wall thickness.
- Open the front cover of the outer unit and attach it to the cell wall with screws.
- Close cover
- The lamp can be mounted either on the right or the left.
- Mount condensation water drainage tubes according to the dimensions sheet pg. 27
(avoid creating a siphon)
- Seal the connecting rod at the wall openings in the cold storage cell with silicon from both
the inside and the outside. Also seal the condensation tube where it penetrates the wall.
- For wall installation W, see separate installation instructions for the wall element.
Installation of split units
Installation of outdoor unit
- Screw the cropped strip (included in delivery) to the wall. Insert the outdoor unit and
secure with bracket (included in delivery).
- Standard units are not suitable for outdoor installation (IP23). By using the "remote control"
alternative and the usage of a winter controller (see accessory components), it can be
made suitable for outdoor installation (IP44). We recommend a weather canopy provided
by the client.
- The maximum distance from the indoor unit is 10m, the maximum height difference 3m. If
these values are exceeded, the installation should be performed by a refrigeration
specialist. Minimum distances (see dimensions sheet) must be observed.

Installation of evaporation unit
- Attach the air cooler to the ceiling of the cold storage room. Minimum distances (see
dimensions sheet) must be observed.
- Attention: No condensation evaporation! Condensation water must be fed directly into
the drainage system provided by the client.
- Based on the direction of air flow, the tubing connectors are found on the right, and the
electrical connector on the left (see dimensions sheet): Suggested bore diameter for the
refrigerant tubing is 85mm to 95mm.
Installation of the refrigerant tubing with the Aeroquip coupling:
- Remove the tubing from the packaging and carefully unroll it without creating any kinks.
- If necessary, please clean the threads of both clutch halves with a clean cloth, in order to
prevent the encasement of dirt and humidity within the system.
- Lubricate the threads, membranes and the rubber seal of the male half of the coupling
with refrigerant oil, or alternatively acid free oil (sewing machine oil). Then screw the
coupling nut on by hand, until it engages the threads. Tighten by using two exact fitting or
adjustable wrenches until a noticeable resistance occurs. The hexagon nut and the
bulkhead wall resp. counter hexagon have to be marked axially and then the nut has to be
tightened further until the marks are out-of-line by ¼ turn (approx. 90°) to each other. The
result is a leak-proof metallic connection between the clutch halves. (check the seal
tightness with the enclosed leak detector spray!)
Notice: Please note that once the Aeroquip connection has been closed, it cannot be
opened again without the loss of refrigerant. Therefore, such tasks should only be
performed by a refrigeration specialist.
In conclusion, the electrical connecting cable leading from the outer unit to the inner unit
must be hooked up (see connecting diagram).
Self-manufacture of the copper tubing:
- None of the parts may get into contact with water during mounting.
- The copper tubes must be brazed into the Aeroquip screw connections with a silver filling
for brazing (fire hazard; pay attention to the membrane), then the impermeability must be
checked.
- Please note that the suction pipe must be insulated.
- Afterwards the tubes must be evacuated by use of a vacuum pump for at least 15
minutes.
- Then the fluid pipe needs to be filled with a liquid refrigerant.
The suction line is to be filled with a gaseous refrigerant (see table on Pg. 31 for filling
volume).
- When installing the lines, please note that the uphill gradient may not exceed 3m and the
total length may not exceed 10m.1
- Tighten the Aeroquip-fittings as described.
- Lay out electric and control cables and connect them to the designated terminals.
Attention: Do not tamper with the unit unless it is disconnected from the power supply.
All work should be done by a refrigeration specialist. The non-observance will lead to the
loss of all warranty claims.
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Ceiling installation
- Create recesses in the cold storage cell ceiling (see Pg. 30 in the instruction manual) and
control wall distances.
- Mount the refrigeration unit.
- Mount the inner lighting.
- Attach remote control if desired.
- Attach the X6 junction box for fault indication (optional), door contact switch (provided by
client) and door frame heating (provided by client).
- If necessary, mount the construction frame (accessory).
- All openings in the cold storage room must be sealed with silicon from the inside and the
outside.
4) Initial operation
- Prepare a lines voltage of 230V

10% 50 Hz. The necessary fuse is listed on the type
plate of the unit. We recommend fuse protection (delay type) or an automatic circuit
breaker (type C). An additional safeguarding for the unit with a ground fault circuit
interrupter (minimum tolerated leakage current is 50 mA) can only be achieved by a
separate GFCI. No other appliances may be operated by this ground fault circuit
interrupter.
- Units with oil sump heating must be heated to an ambient temperature of at least 10°C
before start-up. Connect the unit to the line voltage and switch on after the compressor is
clearly warmed.
- After connecting the main plug to the power supply, the main operating switch (red) needs
to be switched on.
For units with remote control operation, the key „Cooling On“ needs to be pressed on the
remote control.
Subsequently, the automatic control performs a self test (approx. 1 sec), activates the
refrigeration unit and begins the pre-selected refrigeration operation.
- First cool the empty cold storage cell to the desired refrigeration chamber temperature.
- After the selected temperature has been achieved, the cold storage cell can gradually be
filled with contents.
- If there is an ice build-up on the air cooler, the manual de-frost process must be
performed. See Refrigeration controller TAR 1309 pg. 8 or TAR 3810 pg. 11 for a remote
control.
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5) Accessory Connecting Cable For Split Systems
Legend:
S1 cooling room lighting switch X1 clamping strip, terminal box
S2 refrigeration switch X2 clamping box, evaporator
H1 cooling room lighting X3 condenser unit terminal box
B1 sensor, PTC cooling room X4 temperature sensor condenser terminal box
B2 sensor, PTC evaporator X5 temperature sensor evaporator terminal box
M1 evaporator fan
E1 heating condenser
E2 heating drainage
E3 heating door frame (provided by client, GEKT)
1) Cable no. 10.1 and door frame heating only for GEKT
2) Individual connecting cables are not included in delivery, but can be ordered in varying lengths if desired
3) Connection terminal for cooling room lighting
4) Wiring for remote control
Switch
S2
Switch
S1
Terminal box
Controller
Condenser
Connecting cable
Evaporator cooling cell
The split unit evaporator and condenser units are wired as pictured in the diagram below.
ACCESSORY CONNECTING CABLE FOR SPLIT SYSTEMS
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6) Refrigeration controller for standard units
(operation of the unit refrigeration controller TAR 1309)
Pos.1 Pos.2 Pos.3
DISPLAY
„
+“ Button
„Programming“
Button
„
-“ Button
Never push the buttons with sharp objects (for example screwdrivers, pens, or similar objects).
Display
In normal operation, the current cold storage room temperature is shown, which is measured by
a sensor.
During operation, 3 lights indicate the switching status of the relays.
Pos. 1: on: compressor on
off: compressoroff
Pos. 1: flashing: Defrost mode active
Pos. 2: without function for cold room controller TAR 1309
Pos. 3: on: evaporation fan on
off: evaporation fan off
Settings
The most important key functions are described below. For further setting modes please consult
the mounting and operation instructions of the cold room controller.
The operation parameters of the cold room controller are set at the factory of the manufacturer.
Therefore, only the desired room temperature needs to be set for operation of the unit.
Setting the desired cold storage room temperature:
Press the P-key. Select the parameter P03 by pressing the + (plus)-key. Press the P-key
again. The set temperature is indicated. By pressing the – (minus)-key or the + (plus)-key, the
set temperature can be changed. Press the P-key again. After releasing the key, the newly
set temperature is saved and is maintained even during power failure.
-8-

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Setting the "upper alarm temperature", parameter P20:
Selection and setting as described in parameter P03. The default setting is the given value for
P03 plus ..K. The entry can only be made if the code was entered for parameter P30 (see the
table for factory settings).
Displaying set temperature: Push the "P" button and select parameter P03,
Push the "P" button again.
Delete alarm signal: Push "+" or "-" button.
Manual defrost activation: Push the "P" button and select parameter P029,
Push "P" button again,
hold the "+" button for approx. 3 sec.,
the defrost process starts and ends automatically.
Manual stopping of defrost process: hold the "+" button for approx. 3 sec.,
defrost process is stopped.
Options
"High storage humidity” Option:
Continuous operation of the evaporation fan (standstill during defrost).
Creates an increase in the relative humidity in the cold storage room.
Enter code 88 in parameter 30.
Set parameter P18 to 2 and confirm with the P button.
"Circulation Defrost” Option: (minimum room temperature of 4°C)
Fan runs during defrost. => latent heat utilisation
Creates an increase in the relative humidity in the cold storage room.
Enter code 88 in parameter 30.
Set parameter P18 to 3 and confirm with the P button.
Set parameter P19 to 0 and confirm with the P button.
Disconnect electric heating E1 E2 according to the circuit diagrams on pgs. 19pp.
Connect the door frame heating (on site) according to the circuit diagrams pgs. 19pp.
Meaning of the alarm signals
Buzzer activated : the upper or lower alarm temperature has been exceeded for a longer
period of time than the delay time set for the alarm.
Flashing display: the occurrence of sensor breakage or sensor short circuit.

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Operational settings of the refrigeration controller TAR 1309 (standard)
Changes to the settings of the refrigeration controller should only be performed by a
refrigeration specialist.
Depending on the unit type - normal cooling (GEKN) or deep-freezing (GEKT) -, the
controller is set with the parameter described below. Should you need to adjust these
settings, please observe the specified permitted operation parameters P05 and P06 for room
temperatures. Non-observance will lead to the loss of any warranty claims for the
refrigeration unit.
Parameter Description Operation setting for unit type:
GEKN GEKT
P01 Actual room temperature (control sensor)
°C -- --
P02 Actual evaporator temperature (defrost
limitation sensor) °C -- --
P03 Set value of room temperature + 5°C - 18°C
P04 Room temperature difference 2 K 2 K
P05 Highest permitted room temperature + 12°C - 5°C
P06 Lowest permitted room temperature - 5°C - 25°C
P07 Switching behaviour of the compressor
relay
(1= Cooling)
1 1
P08 Display mode (1=°C, 2=°F) 1 1
P09 Sensor calibration T1 (room) 0 K 0 K
P10 Sensor calibration T2 (evaporator) 0 K 0 K
P11 Defrost limitation temperature 12°C 12°C
P12 Defrost mode (1=electrical) 1 1
P13 Defrost cycle 12 Std 16 Std
1
P14 Defrost time limitation 35 min. 35 min.
P15 Defrost delay after switching on the
distribution voltage 60 min. 60 min.
P16 Drip time of evaporator 3 min. 3 min.
P17 Set value for after-running of evaporator
fan 50°C 50°C
P18 Operation mode of evaporator fan 1 1
P19 Starting delay of evaporator fan 5 min. 5 min.
P20 upper alarm temperature (P03 +_K) 13°C 2 – 8°C 2
P21 Lower alarm temperature - 6°C - 30°C
P22 Delay time for alarm 90 min. 90 min.
P23 Alarm / Fan mode 0 0
P24 time left until defrost -- --
P25 time left until defrost finish -- --
P26 time left until compressor start -- --
P27 time left until alarm -- --
P28 Display of remaining time -- --
P29 Manual defrost -- --
P30 Code input 88 88
1) It is important to ensure that the evaporator does not ice up during operation.
The defrost times are to be set according to need and the corresponding requirements.
2) Entry of the alarm temperature in °C. This does not automatically adjust to the set-point for room temperature (P03).

7) Refrigeration controller for units with remote control
(Refrigeration controller TAR 3810)
DISPLAY
„programming“ button
„select“ button
lighting
On-Off
p
os.4
pos.2
cooling
On-Off
p
os.3
p
os.1
„
+“ button
„
-“ button
Do not press the keys with sharp objects (e.g. screwdrivers, pens, or similar).
Display
- In normal operation, the current cold storage room temperature is shown, which is
measured by a sensor.
- During operation, 4 lights display the switching status of the relays.
Pos. 1: on: compressor on off: compressor off
Pos. 2: on: defrost mode on off: defrost mode off
Pos. 3: on: evaporator fan on off: evaporator fan off
Pos. 4: on: warning on off: warning off
Settings
The most important key functions are described below. For further setting modes please consult
the mounting and operation instructions of the cold room controller.
Cooling On/Off: Hold „Cooling On/Off“-key for 3 seconds.
Room Illumination On/Off: Hold „Room Illumination On/Off“-key for 3 seconds. This button is
ineffective for the option "door contact" and "fault indication" (see circuit diagram pg. 20, 22, 25
of the instruction manual).
The operation parameters of the cold room controller are set at the factory of the manufacturer.
Therefore, only the desired room temperature needs to be set for operation of the unit.
Setting the desired cold storage room temperature:
Press the P-key. Select the parameter P03 by pressing the + (plus)-key. Press the P-key
again. The set temperature is indicated. By pressing the – (minus)-key or the + (plus)-key, the
set temperature can be changed. Press the P-key again. After releasing the key, the newly
set temperature is saved and is maintained even during power failure.
Display of set-point temperature: push the "P" button and select parameter P03,
push the "P" button again
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Delete alarm signal: push "+" or "-" button
Manual defrost activation: push the "P" button and select parameter P49,
push "P" button again,
push "+" button approx. 3 sec.,
the defrost process starts and ends automatically.
Manual stopping of defrost process: push "-" button approx. 3 sec., defrost process is stopped
Adjusting the clock: setting parameters P41 to P45
Options
"Door contact switch" option:
When the door is opened: evaporation fan turns off immediately; the compressor is turned off
after 3 min.; an alarm sounds according to P35.
The bridge is omitted, connect the door contact provided by the client according to
1
the circuit diagram pg. 20, 22 or 25.
Enter code 88 in parameter 50.
Set parameter P34 to 1 and confirm with the P button.
When the door is opened: light is on.
The bridge … and is omitted, connect door contact according to circuit diagram
pg.20, 22 or 25.
2
3
"Fault indication, potential free" option:
The bridge circuit and is omitted, connect door contact according to circuit diagram
pg. 20, 22 or 25.
2
3
Enter code 88 in parameter 50.
Set parameter P30 to 0 and confirm with the P button.
Strip terminal X6.1 terminal 1 and 2 are now fault indication contacts.
Turn on light above the door contact or with the switch provided by the client.
"High storage humidity" option:
Continuous operation of the evaporation fan (standstill during defrost)
creates an increase in the relative humidity in the cold storage room.
Enter code 88 in parameter 50.
Set parameter P13 to 2 and confirm with the P button.
"Circulation defrost": (minimum room temperature of 4°C) option:
Fan runs during defrost => latent heat utilisation
Creates an increase in the relative humidity in the cold storage room.
Ente code 88 in parameter 50.
Set parameter P13 to 3 and confirm with the P button.
Set parameter P14 to 0 and confirm with the P button.
Disconnect electric heating E1 E2 according to the circuit diagrams on pgs. 19pp.
Door frame heating option
Connect the door frame heating (provided by client) according to the circuit diagrams pgs.
19pp.
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Settings mode of the remote control
Attention: The remote control has been pre-configured at the factory.
The following parameters from the settings mode should only be changed or adjusted by
a refrigeration specialist.
By pushing the F-button for approx. 3 sec., one enters remote control settings mode. In remote
control settings mode, two light-emitting diodes flash simultaneously.
Changing all further settings is done by pressing the P-key as well as the – (minus)-key or the +
(plus)-key.
No. Meaning Area Operation
setting
P01 No. of the current unit being operated 1 - 8 1
P02 baud rate 1 - 5 5 (*)
P03 query delay 40 -120 100
P04 address of the first unit 1 - 78 78 ( **)
P05 addresses of the 2nd to 8th units 77...71 0 (***)
(*) This value must be identical to the value in parameter P47.
(**) If there is only one unit, then this value must be identical to the value in parameter P48.
(***) Standard setting for the operation of a single unit.
- Hold the "F" button for approx. 3 sec. Exiting the parameter level of the remote control.
Attention: Never change parameter P02 and/or P04 of the remote control, because
communication with the refrigeration controller will be discontinued.
Alarm signal interpretation
"– 56“ and/or „-67“: Improper sensor type selected (parameter P21)
or a short circuit in the sensor
"111" to "999" Self test mode, turn off power and after 15 sec.
turn it back on.
All parameters must be checked.
Buzzer Activated when the upper or lower alarm temperature is exceeded for
a longer period of time than the set alarm delay.
Flashing display: When sensor breakage or sensor short circuit occurs, or the signal
Any display is not within its specified range.
Display "----" The communication between the remote control and the controller is
disconnected.

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Operational settings of the refrigeration controller TAR 3810 (remote control)
Changes to the settings of the refrigeration controller should only be performed by a
refrigeration specialist.
Depending on the unit type - normal cooling (GEKN) or deep-freezing (GEKT) -, the controller
is set with the below described parameters. Should you need to adjust these settings, please
observe the specified permitted operation parameters P07 and P08 for room temperatures.
Non-observance will lead to the loss of any warranty claims for the refrigeration unit.
Parameter Description Operation setting for unit type:
GEKN GEKT
P01 actual room temperature (control
sensor)°C -- --
P02 actual evaporator temperature (defrost
limit sensor) °C -- --
P03 Set value of room temperature + 5°C - 18°C
P04 Set value of night temperature + 5°C - 18°C
P05 Turning-on time of set value during night off off
P06 Turning-off time of set value during night off off
P07 Highest permitted room temperature + 12°C - 5°C
P08 Lowest permitted room temperature - 5°C - 25°C
P09 Room temperature difference 2 K 2 K
P10 switching behaviour of the compressor
relay
(1= cooling)
1 1
P11 Set value for after-running of evaporator
fan 5 min. 5 min.
P12 Operation mode of evaporator fan 50°C 50°C
P13 Starting delay of evaporator fan 1 1
P14 evaporation fan start-up delay 5 min. 5 min.
P15 time left until defrost finish -- --
P16 time left until compressor start-up -- --
P17 time left until evaporator fan start-up -- --
P18 time left until alarm activation -- --
P19 sensor calibration T1 (room) 0 K 0 K
P20 sensor calibration T2 (evaporator) 0 K 0 K
P21 sensor type (1 = TF 501 – 110 …+120°C)
(2 = TF 201 – 110 …+105°C) 2 2
P22 Defrost limitation temperature 12°C 12°C
P23 Defrost mode (1=electrical) (2= hot gas) 1 1
P24 Defrost time 1 (xxx,xx in h,x in min x 10) 000 1) 000 1)
P25 Defrost time 2 (xxx,xx in h,x in min x 10) 120 1) 060 1)
P26 Defrost time 3 (xxx,xx in h,x in min x 10) off 120 1)
P27 Defrost time 4 (xxx,xx in h,x in min x 10) OFF 180 1)
P28 Defrost time limitation 35 min. 35 min.
P29 Drip time of evaporator 3 min. 3 min.
1) If using more than one unit, it is recommended to set a different defrost time for each unit. It is important to ensure that
the evaporator does not ice-up during operation.
The defrost times are to be set according to need and the corresponding requirements.

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Parameter Description Operation setting for unit type:
GEKN GEKT
P30 Alarm mode (0= for alarm exit active)
(6= for remote control) 6 2) 6 2)
P31 Delay time for alarm 90 min. 90 min.
P32 Upper alarm temperature P03 + 8 K P03 + 10 K
P33 Lower alarm temperature - 6°C - 30°C
P34 Command input (0 = deactivated)
(1 = door contact) 0 2) 0 2)
P35 Delay time for command input 30 min. 2) 30 min. 2)
P36 Upper value voltage output 0 0
P37 Lower value voltage output 0 0
P38 Mode voltage output (0 = off) 0 0
P39 State of the temperature listings
(0 = Off, 2 no listings) 0 0
P40 Intervals for listings 15 min. 15 min.
P41 date entry, year -- --
P42 date entry, month -- --
P43 date entry, day -- --
P44 time entry, hour -- --
P45 time entry, minute -- --
P46 time entry, second -- --
P47 Baud rate 5 = 19200 Baud) 5 5
P48 Unit address in the network 78 78
P49 Manual defrost -- --
P50 Code input 88 88
Attention: Never change parameters P47 or P48 of the remote control. This would
interrupt the communication between the remote control and the cooling cell controller.
If these parameters are changed for any reason, then the communication to the cooling cell
controller can only be restored via the setting mode of the remote control. The baud rate and the
unit address must be set to have the same values as P47 and P48.
8) Technical data
Compact, ready-to-use refrigeration units for all cold storage cells with refrigeration temperatures
from –25°C to –5°C, or -5°C to 12 ° C (extra-low temperature and standard cooling).
(Maximum permissible temperature up to 16°C)
Delivery contents and delivery status:
Stable, torsionally stiff housing, colour: white, powder coated, suitable to be mounted on a cell
element with a wall thickness of 70 – 120mm, with a fan guards for the evaporation fan according
to DIN 31001.
Complete refrigeration equipment consisting of:
- sealed compressor with a winding protection switch
- ventilated condenser
- ventilated evaporator
- thermostatic expansion valve
- collector dryer
- automatic, electronic defrosting with a timer and demand-optimized defrost function

-16-
- condensation evaporation with hot gas (saddle model H, wall W and ceiling D)
- for the unit GEKN 2000-3000, the oil heating in the compressor is standard equipment.
The unit comes factory made with tubing according to VBG 20, wired according to VDE
regulations, equipped with 2.5 m connecting cable and a shock-proof plug and filled with a
hydrocarbon refrigerant.
Weight of the integrated refrigeration units:
Integrated
refrigeration GEK..- N
0600 N 0900 N 1200 N 1500 N 2001 N 3001 T 0501 T 0701 T 1001 T 1201 T 1501
..-H/..-W/..-S *)
Weight (kg) net gross 43 60 51 68 54 71 55 72 76 104 82 110 45 62 48 76 68 96 72 100 89 117
..-D *)
Weight (kg) net gross 55 79 61 85 66 90 67 91 92 123 102 133 55 79 62 86 92 113 83 114 103 134
*) model type ..-H: piggyback (saddle)
..-W: wall unit
..-S: split unit
..-D: ceiling unit
Attention: Observe the load-bearing capacity of the refrigeration cell walls!
9) Stopping operation of the refrigeration unit
During long periods of stoppage or cleaning, the refrigeration unit is to be shut down by pulling
the power plug. For restarting the units with oil sump heating, the time of start-up is to be noted.
Notice: After a power failure, the refrigeration unit starts up automatically.
All saved data is retained.
10) Energy saving instructions
- The refrigeration unit should not be placed near sources of heat. If there are high ambient
temperatures, the unit switches on too often.
- Direct sunlight increases the use of electricity.
- Avoid unnecessary and prolonged opening of the door.
- Refrigeration unit should be cleaned regularly. A clean unit saves energy and has a longer
life.
11) Cleaning and maintenance
- With the exception of occasional cleaning of the condenser, and perhaps the
evaporator, the unit is maintenance free.
- The refrigeration unit should be checked and cleaned 12 to 18 weeks after operational
start-up at the latest. Depending on the degree of soiling, the time interval up to the next
check or cleaning can then be determined. The time interval for cleaning depends on the
ambient conditions.

-17-
- Before the cleaning, the unit should be unplugged and secured against any possible start-
up. If the air contains fibres, the fins of the heat exchanger will become dirty. To avoid
malfunction, the heat exchanger and the tank overflow must be cleaned from time to time.
- The condenser / evaporator can either be cleaned with a soft brush, with compressed air,
or a vacuum cleaner. Please do not use any sharp or sharp-edged objects. The fins must
not be bent or damaged during the cleaning procedure.
12) Causes for malfunction
Malfunction Cause Solution
power plug is not plugged in;
energy supply is disconnected
check the power plug and mains fuse;
if no fault is detected, notify a
specialised firm
Unit does not run
supply voltage is too low supply voltage must be
230V10%, 50 Hz
high strain on the refrigeration
room due to contents
store less content (observe storage
data and time limit of the chilled
goods)
there is too much content or the
content is too warm, or the door of
the refrigeration room was open
too long
store less content at one time, or cool
down the temperature of the content to
the desired storage temperature
before adding
ambient temperature is too high reduce ambient temperature (max. 35°C for standard model and max. 45°
for high-temperature model)
Unit runs continuously
evaporator is dirty
condenser is dirty clean fins; see maintenance and cleaning
Unit runs continuously and the
evaporator is iced-up
door open for long periods;
uncovered liquids in the cooling
cell
keep the periods with door open short,
cover liquids;
activate manual defrost
if necessary, increase the defrost cycle
(see pg. 10 / 14)
Nothing shown in the display of
the remote control power supply for the remote control was discontinued or there
was a short circuit.
check the power supply to the remote
control; if no fault is found, notify a
specialised firm
if necessary, information available at
+49 9221 / 709 321
The display of the remote
control shows: ”---“ the communication between the remote control and the
refrigeration controller was
disconnected:
a) due to incorrect
parameterisation
b) due to interruption or short
circuit in the connection lines
a) Change unit address and/or baud
rate by using the setting mode of the
remote control (see pg. 13)
If necessary, information available at
+49 9221 / 709321
b) Check connection between the
remote control and the refrigeration
controller and if necessary re-establish
it.
Lamp or client-supplied door
frame heating doesn’t work faulty fuse check fuse, and if necessary replace

13) Refrigeration cycle diagram
Legend:
1 Compressor
2 Pressure line
3 High pressure switch
4 Hot gas snake
5 Condenser
6 Receiver dryer
7 Fluid line
8 Expansion valve
9 Evaporator
10 Suction pipe
11 Cooling cell (Insulation for ceiling
units)
-18-

14) Wiring Diagramm
P
3L
2N
N PE
-K1M
/2.0
/2.0 /2.0
/2.0
3L-X1
PE
-E3 -B1 -B2 -E4 -P1-H1
3L 2N PE PE
1
0
-X1
/2.0
/2.0
-N1
1a 4b
5b2a
1a 4b
5b2a
-S1 -S2
Regelfühler
Abtaufühler
Kühlen
Abtauen
Ventilator
12-24V AC/DC
-X1.1 -X1
12
1
2
230V / 1Ph/N 50Hz / 1 x 16A
86
SCHALTPLAN FÜR HUCKEPACKGERÄTE
(BEDIENUNG AMGERÄT, TAR 1309)
24
/2.6
68
/2.7
-T0
230V 12V
2N
6
7
8
9
10
2
1
3
4
5
-X1
4
-X6
Absicherung 16 A träge
5
6
Applies to: Piggyback H (operation on unit)
Refrigeration controller TAR 1309
Fuse: 16 A (delay)
-19-

P
3L
2N
N PE
-K1M
/2.0
/2.0 /2.0
/2.0
3L
-X1
PE
-B1 -B2 -E4-P1
-A2
3L 2N PE PE
1
0
-X1
/2.0
/2.0
PE
Licht/ Alarm
Dig. Eing
-X1
1
2
1
4
230V / 1Ph/N 50Hz / 1 x 16A
86
SCHALTPLAN FÜR HUCKE
-20-
PACKGERÄTE MIT
FERNBENDIENUNG(KÜHLSTELLENREGLER TAR 3810)
24
/2.6
68
/2.7
2N
4
19
18
17
16
15
14
13
12
11
10
9
8
7
6
36
35
38
37
31
30
29
28
27
Ventilator
Abtauen
Kühlen
Abtaufühler
Regelfühler
RS 485
DC
NDO
DO
1
243
12 7
5
2
3
4
1
89
12
43
9
84
-E3
-F2
Option Türkontakt:
- Gerät Ein-Aus Brücke 1 entfällt
- Licht Ein-Aus Brücke 2+3 entfällt
Option Störmeldung:
- Parameter 30 auf ,,0'' oder ,,2'' setzen
- Brücke 2+3 entfallt
- Licht H1 kann nur über Türkontakt
od. bauseitigen Schalter betätigt
werden
-X1
N
L
BAT
PE
-X1.1
-X1
-X1.1
-X2.1
-X2.1
-
+
-
+
-N1
-X1.1
-X1.1
1 2 3
4610 11 2
-H1
-S3
-X1
-X1.1
-X1
3
Applies to: Piggyback HF (with remote control)
Refrigeration controller TAR 3810
Fuse: 16 A (delay)