REMKO RKW 1000 â 9800 INOX Stainless Steel Chiller Operation ...

REMKO RKW 1000 – 9800 INOX 

Stainless Steel Chiller 

Operation 

Technology 

Spare Parts 

Edition GB – M11 

REMKO – powerful like a bear

Operating Instructions 

Read these instructions carefully before setting up/operating the unit! 

Our guarantee becomes null and void if the unit is used, set up 

REMKO Stainless Steel Chiller 

RKW 1000 INOX / 1600 INOX / 2600 INOX 

3600 INOX / RKW 4500 INOX / 8000 INOX / 9800 INOX 

Contents Page 

Unit Description 4 

Safety Hints 4 

Transport and Packaging 5 

Operation 5 

Maintenance and Service 9 

Shutting Down the Unit 10 

Alarm Description 10 

Troubleshooting 11 

Technical Data 12 

Dimensions 13 

or maintained improperly, 

or if modifications are made to the supplied unit without our prior consent. 

Subject to alterations! 

Contents Page 

Assembly Instructions for Service Personnel 14 

Unit Assembly 14 

Storage Modules for RKW 3600 to 9800 I 17 

Cable Remote Control 20 

Electrical Connection 21 

Hydraulic System 24 

Initial Operation 25 

Environment and Recycling 26 

Service and Guarantee 26 

� Always keep these operating instructions near or on the unit! � 

3

Unit Description 

REMKO chilled water air-conditioning systems consist 

of an outer part ready which is ready to be connected, 

the air-cooled chiller (REMKO RKW INOX) and one or 

more inner units (cold water consumers: REMKO KLT, 

WLT, DKT and FLG). All components required for cooling 

are located in the outer part. 

A hermetically closed cooling cycle in the chiller cools 

the water (or a brine made of water and antifreeze) to 

up to 5 °C via a plate heat exchanger. 

A circulation pump integrated either into the unit or in 

the storage module transports the cold water to the inner 

unit(s). To expand the water volume and extend the 

operating time, there is also a cold water tank with 

safety assembly either in the unit or located in the separate 

storage module. 

In the inner units, the air in the room is guided through 

the heat exchanger of the inner units by means of a 

quiet fan. When the air in the room leaves the unit, it is 

cooled, demoisturized and filtered. The water warms up 

and transports the heat absorbed from the room back to 

the outer part where it is passed along to the cooling cycle 

and the surroundings. 

The RKW 1000, 1600 and 2600 INOX chillers all have a 

hydraulic system that is ready to be connected with a: 

◊ Buffer tank 

◊ Expansion vessel 

◊ Safety valve 

◊ Flow switch (differential pressure monitor) 

◊ Manometer 

◊ Ventilation 

◊ Ventilation valve 

◊ Drain valve 

The RKW 3600 INOX chiller models and higher can be 

easily equipped with a storage module that has an integrated 

hydraulic system, even at a later time. 

The system is regulated by means of a self-sufficient 

microprocessor that monitors system safety parameters 

and displays any malfunctions and monitors the set cold 

water temperature. A connection between the chiller 

and the cold water consumers is not required. 

To air condition rooms, an outer part is usually used in 

connection with the appropriate inner units (consumers). 

Here, there are various options available depending on 

how the unit is being used. In addition to standalone 

units, wall and ceiling chests, ceiling cassettes with various 

capacities can also be selected for mounting on intermediate 

walls. 

REMKO chillers are suitable for almost every type of application 

when used with the right consumers if the priority 

is cooling according to needs. 

Thanks to modern technology, the chillers require up to 

80 % less coolant than other cooling and airconditioning 

systems. 

4 

The coolant is only necessary to cool the transport medium 

(water or brine). In conventional systems, the coolant 

is also required to transport the heat from the inner 

units (consumers) to the outer part. 

This makes another advantage of the REMKO chillers 

evident; they do not require coolant lines to the inner 

units (cold water consumers). All connection lines are 

designed to be water lines with the correct dimensions 

and heat insulation. 

Ideally, lines of an existing heating network can be integrated 

into the overall system. 

Proper use 

The outdoor parts have been designed and fitted exclusively 

for operation with REMKO indoor units belonging 

to the RKV series. 

The manufacturer assumes no liability for damage resulting 

from non-compliance with manufacturer specifications 

and legal requirements, or if modifications are 

made to the units. 

Safety Hints 

Extensive tests have been conducted on the material, 

functionality and quality of these units before they were 

shipped. These units may only be used in accordance 

with their intended purpose. Hazards may arise if the 

units are used improperly. 

Please make sure to follow these safety instructions. 

◊ Make sure that personnel trained in the operation of 

the chiller check the unit for visible defects on the operating 

and safety mechanisms each time before 

putting it into operation. 

◊ Before any work on the unit is performed, it must be 

disconnected from the power supply and secured 

against switching on! 

◊ The unit may only be filled up and operated with water 

or a mixture of water and glycol (brine)! 

◊ Ensure that the air intake and outlet openings are always 

clear of foreign objects. 

◊ Do not insert any objects into the air intake and outlet 

openings. 

◊ Do not install the unit close to heat sources. 

◊ Make sure to maintain the safety zones described 

later in this manual! 

◊ Do not use flammable gases such as spray paint in 

the direct vicinity of the units. 

◊ Make sure that the unit is kept at a safe distance 

from flammable materials. 

◊ Do not operate the unit if the atmosphere is contaminated 

by oil, sulfur or salt. 

◊ If there is a cable remote control installed, make sure 

to protect it against moisture and direct or indirect 

sunlight!

◊ Operate the units exclusively within the permissible 

operating ranges. 

◊ Do not expose the unit to direct streams of water 

High-pressure cleaners, etc. 

◊ Protect the connection lines from being damaged, for 

example, by animals. 

◊ The unit may only be connected to a correctly installed 

and grounded power supply. 

◊ Never open the unit housing. 

There may cause an electric shock. 

◊ Operate the unit only when assembled and for their 

intended purpose. Keep in mind that it is dangerous 

to remove covers protective grilles, etc., during operation; 

this can lead to uncontrolled operating situations. 

◊ Never operate the unit in rooms susceptible to explosions. 

The units are also not suitable for operation in 

rooms containing large amounts of dust or aggressive 

air. 

◊ Installation and repair work may only be performed by 

authorised personnel. 

◊ Cleaning and minor maintenance work made only be 

performed by the operator or an authorised person 

designated by him in accordance with the instructions 

contained in the section "Maintenance and Service". 

◊ If the unit is set up outside and is susceptible to being 

hit by lightning, the appropriate countermeasures 

must be implemented by an authorised company. 

Transport and Packaging 

The unit is shipped in a stable transport box made of 

wood and cardboard. Please examine the unit when it is 

delivered 

Make note of any damage or missing parts on the shipping 

bill and notify the shipping company and your contract 

partner. 

We do not assume any liability for subsequent complaints. 

Instructions: 

◊ When shipped, the units are packaged in a box and 

mounted on a palette. 

◊ The units must remain upright and be transported 

with suitable means. They must also be adequately 

secured from falling over. 

◊ If the units are transported to a setup location that is 

higher up, such as platforms or roofs, they must be 

transported in an upright position as shown below. 


The chiller is operated fully-automatically by an internal 

regulation or by an external cable remote control installed 

by the customer. 

Both types of unit operation allow some parameters to 

be changed as well as the water return temperature to 

be displayed. 

Internal and external regulation 

Pulling point 

Wooden boards to protect 

from pressure 

CH-DIN regulation Cable remote control 

5

Regulation 

CH–DIN regulation of all RKW INOX units 

The CH–DIN microprocessor regulates the chiller for all 

INOX units. It is located in the electrical switch box of 

the unit and monitors all control and safety functions: 

◊ Controls and displays incoming and outgoing cold 

water temperatures 

◊ Displays the time delay of the compressor and fan 

◊ Checks that the outgoing water temperature is not 

too low (frost monitoring) 

◊ Displays and controls all safety mechanisms that 

have been stopped due to a malfunction 

◊ Displays the operating mode 

◊ Regulates the condensation temperature 

The regulator consists of the basic unit to control unit 

operation. A fan board is connected to the basic unit 

that controls the rotation of the fan motors by regulating 

the output current depending on the liquefaction temperature. 

Models RKW 3600 INOX and higher have two cold cycles. 

The second cycle cannot be regulated by the CH– 

DIN basic unit because there are not enough inputs and 

outputs. For this reason, the extra C2-DIN regulator 

controls the second cycle. Programming is, however, 

still performed using the CH–DIN basic unit. 

CH– DIN panel 

6 

Value display Arrow keys Code display 

CH-DIN 

8 

Heat 

Cool 

❅ 

8. 8 

MODE 

MENU 

Comp 

SET 

8 

STATUS 

MENU button STATUS button 

MODE button SET button 

8 

Alarm 

Line 

ON/OFF 

RESET 

ON/OFF 

RESET button 

The panel has two displays: the value display (three 

numbers on the left) and the code display (two numbers 

on the right). 

MENU 

STATUS 

MODE 

The buttons allow operating 

processes (parameters) and their associated values to 

be changed. 

SET 

ON/OFF 

RESET 

Value Display 

The value display shows the target value in degrees 

with one decimal place in Celsius. It can also display: 

◊ All parameter settings 

◊ The codes for all alarms 

◊ The status of the functions 

◊ The operating hours 

◊ The shut-off status 

8 8. 8 

◊ The current delays 

A square LED displays minus temperatures and an LED 

in the top left-hand corner shows the multiplier of the 

displayed value with 100. 

Code Display 

The code display indicates the number of the parameter 

(or the function) whose value or status appears in the 

value display. If a parameter is shown in the code display, 

the setting appears in the value display. 

Arrow Keys 

8 

8 

The set value for each parameter can be changed with 

the arrow keys. 

When the parameter programming operating mode is 

accessed (via the MENU button), both displays show a 

value (continuous display). After the SET button has 

been pressed, the code display (parameters) starts 

blinking. The displayed values can be increased or decreased 

using the arrow keys. If the SET is pressed a 

second time, the value display blinks. The new values 

are saved by pressing the SET button again. Both displays 

switch from a blinking display to a continuous display. 

MODE Button with two LEDs 

The regulation mechanism was designed for use of a 

chiller in the cooling operating mode Cool ❅ and as a 

heat pump in the cooling and heating operating 

modes. Heat 

Only the summer operating mode (cooling mode) Cool ❅ 

may be used for all INOX units. 

MENU Button with one LED MENU 

The MENU button provides access to the parameter list 

and displays the parameters on the code display and 

the associated value on the value display. 

STATUS Button with one LED 

MODE 

STATUS 

The STATUS button provides access to the status list 

and displays the status settings by pressing the arrow 

keys. 

The code display shows the function number of the 

function list and the value display shows the corresponding 

setting. The codes and their descriptions are 

described in the table on page 8.

ON/OFF/RESET Button 

ON/OFF 

RESET 

This button is used to switch the unit on and off. If the 

alarm has been set off and the unit has to be manually 

reset, this button is pressed to prevent further alarms 

from being acknowledged. At the same time, the normal 

operating function of the unit is restored. 

Alarm LED 

Alarm 

If this LED is lit up, the unit’s alarm has gone off and operation 

has been interrupted. 

SET Button 

SET 

The parameters settings can be changed by pressing 

the SET button together with the arrow keys. 

Compressor LED 

This LED is not lit up when the compressor is not in operation. 

If this LED is blinking, the compressor is currently 

in start-up time delay and will begin operation after 

this time has elapsed. If this LED is continuously lit 

up, the compressor is in operation. The time delay is no 

longer active. 

Line LED 

Fan Board 

Line 

Comp 

This LED is continuously lit up when the regulation is 

connected to the power supply. 

The fan board is connected to the CH–DIN regulation. 

The CH-DIN (C2-DIN) regulation registers the current 

condensation temperature via the sensor input ST 5 (ST 

6) and passes along the corresponding programmed 

output current to the CTK 1 (CTK 2) output of the TK 1 

(TK 2) fan board. 

The fan motor rotation can be controlled by the modulating 

output current. 

Fan board TK 1 Fan board TK 2 

C2–DIN Additional Regulations for Models RKW 3600 

and higher 

For chillers with cooling capacities higher than 26 kW, 

the cooling capacity is divided among two cooling cycles. 

The second cycle cannot be regulated using the 

CH-DIN regulation because there are not enough inputs 

and outputs and requires an additional C2-DIN regulation. 

The C2-DIN regulation controls the same functions 

together with the CH-DIN regulation. These functions 

are only displayed by LEDs. An alarm from the second 

cycle is displayed on the CH-DIN regulation display as a 

code, e.g. “E 01”. 

The CH-DIN regulation is still used to program the settings 

of the second cycle. 

C2– DIN Additional Regulation 

Operating display Compressor 2 

Malfunction display 

High pressure 2 

C2-DIN 

Compr. 

High press. 

C2- DIN additional regulation 

Operating Display Compressor 2 

Compr. 

This display lights up when the compressor of the second 

cycle is in operation. 

Malfunction Display Compressor 2 

Err. compr. 

This display lights up when there is a malfunction in the 

compressor of the second cycle. 

Malfunction Display Fan 2 

Err. fan 


Fan 2 

Err. compr. 

Low press. 

Err. fan 

This display lights up when there is a malfunction in the 

fan of the second cycle. 

High Pressure MalfunctionCycle 2 

High press. 

This display lights up when pressures that are too high 

have been set in the second cycle. 

Low Pressure MalfunctionCycle 2 

Malfunction display Compressor 2 


Low pressure 

CH- DIN regulation 

Low press. 

This display lights up when pressures that are too low 

have been set in the second cycle. 

7

Determining the Operating Mode (Status) 

The Status menu is used to determine the current operating mode of the various system components such as operating 

hours, outputs currently set, the current actual values of the sensor inputs and any current malfunctions. 

Pressing the STATUS button takes you to the Status menu (Status LED is lit up). The left-hand value display now 

indicates the current operating mode of the statuses in the right-hand code display using the index described in the 

table below. These can be listed by pressing the arrow keys in sequence: 

Programming process 

8 

Status Status Description Index Meaning 

01 Compressor 1 01 

02 

03 

04 

06 

Compressor 1 in cooling mode 

Compressor 1 in heating mode (not in use) 

Compressor 1 in defrost cycle (not in use) 

Compressor 1 in time delay ON 

Compressor 1 OFF 

02 Run time Compressor 1 # (value in hours) Operating hours of Compressor 1 

03 Fan(s) Cycle 1 01 

02 

04 

06 

In operation 

Off (defrost for heating pump) 

Time delay ON 

OFF 

05 Rotations condenser fan(s) Cycle 1 # (value as a %) Fan rotation as a percentage 

21 Compressor 2 - - - 

01 

02 

03 

04 

06 

22 Run time Compressor 2 - - - 

# (value in hours) 

23 Fan(s) Cycle 2 - - - 

01 

02 

04 

06 

25 Rotations condenser fan(s) Cycle 2 - - - 

% 

40 

Sensor incoming water temperature 

ST 1 (Cycle 1) 

41 Remote control ON/OFF - - - 

ON 

OFF 

42 

43 

44 

45 

Sensor outgoing water temperature 


Sensor outgoing water temperature 


Sensor condenser temperature 


Sensor condenser temperature 


- - - 

# (value in °C) 

ON 

OFF 

ERR 

- - - 


ON 

OFF 

ERR 

- - - 


ON 

OFF 

ERR 

- - - 


ERR 

- - - 


ERR 

46 Cold water pump - - - 

01 

06 

47 Run time cold water pump - - - 

# (value in hours) 

48 

1 

8 

Defrost heating 

(not in use) 

STATUS 0 4 0 1 

- - - 

01 

06 

0 6 

Not installed 

Compressor 2 in cooling mode 

Compressor 2 in heating mode (not in use) 

Compressor 2 in defrost cycle (not in use) 

Compressor 2 in time delay ON 

Compressor 2 OFF 

Not installed 

Operating hours of Compressor 2 

Not installed 

Fans in operation 

Off (not in use) 

Time delay ON 

OFF 

Not installed 

Fan rotation as a percentage 

Not installed 

Actual value in 0.1°C intervals 

Sensor activated 

Sensor not activated 

Sensor malfunction or failure 

Remote control not installed 

Remote control active 

Remote control locked 

Not installed 

Actual value Cycle 1 




Not installed 

Actual value Cycle 2 




Not installed 

Actual value condenser Cycle 1 


Not installed 

Actual value condenser Cycle 2 


Not installed 

Pump in operation 

Pump not in operation 

Not installed 

Operating hours of the pump 

Not installed 

Heating in operation 

Heating not in operation 

0 

2 

STATUS

Changing the Target Values (Parameters) 

A parameter is a modifiable value that can be set by the 

operator/installer to adjust the chiller to the specific conditions 

and guarantee optimum operation. 

For example, the return temperature, the frost protection 

alarm temperature and the new switch-on differential 

can be changed after the target temperature has 

been reached. 

Access rights for system operators and qualified maintenance 

and service personnel is divided into two parameter 

levels. The operator can only change basic parameters 

on the first level and the service personnel can 

change system-specific parameters on the second level 

after entering a password. 

A technical data sheet which explains the second parameter 

level can be requested separately by a qualified 

company from REMKO GmbH &Co. KG. 


MENU 

1 

8 

Table of the first parameter level 

1 

0 

MENU 

Parameter Function Unit 

First Parameter Level for the System Operator 

The first parameter level is accessed by pressing the 

ON/OFF/RESET button. The current return temperature 

is displayed. 

After pressing the MENU button, the programmed value 

of Parameter 02 (right-hand code display) appears in 

the left-hand display. The right-hand parameter display 

begins to blink when the SET 

button is pressed. This mode displays the options for 

changing the parameters to the programmer. 

If one of the arrow keys is now pressed, the parameter 

jumps to the next higher or lower parameter. 

Once the correct value has been reached for the parameter, 

the value display begins to blink after the SET 

button has been pressed. The displayed value can now 

also be changed using the arrow keys. The programming 

level can be exited by pressing the SET button a 

third time. The settings are saved and the return temperature 

is displayed again. 

RKW INOX factory setting 

1000 1600 2600 3600 4500 8000 9800 

02 Target value regulation, cooling °C 12,0 12.0 12.0 12.0 12.0 12.0 12.0 

03 Target value regulation, heating °C 45.0 45.0 45.0 45.0 45.0 45.0 45.0 

04 Cooling hysteresis °C 1.0 1.0 1.0 0.8 0.8 0.8 0.8 

05 Heating hysteresis °C 1.0 1.0 1.0 0.8 0.8 0.8 0.8 

26 Frost protection alarm target value °C 4.0 4.0 4.0 4.0 4.0 4.0 4.0 

92 Password entry - Technical data sheet 

Maintenance and Service 

The unit almost never requires maintenance. Regular 

care and the observation of a number of basic rules will 

ensure the unit’s long service life and reliable operation. 

◊ We recommend concluding a maintenance agreement 

with a company who specialises in this type of 

work. This will guarantee that the system operates 

safely at all times! 

◊ Keep the unit free of dirt, plants and other deposits 

and only clean the units with a damp cloth. 

Do not expose the units to a direct stream water. 

◊ Do not use an abrasive cleaning agent or one that 

contains solvent; if the units are extremely dirty, only 

use suitable cleaning materials. 

SET 

0 

2 

1 

0 

SET 0 2 0 3 

◊ Before taking the unit out of operation for a longer 

period of time, clean the plate fins of the unit while 

the ventilator is in operation and cover the unit with a 

plastic sheet to prevent dirt from entering the unit. 

◊ For systems with brine, check the ratio of water to 

Antifreeze N or Antifreeze L before taking the unit out 

of operation in winter to protect the system from 

frost. 

◊ We recommend having the unit checked at regular 

intervals (once or twice a year) to ensure that it is 

functioning properly and there are no leaks. 

1 

1 

SET 

9

Shutting Down the Unit 

Temporary shutdown 

If the unit is to be taken out of operation for a longer period 

of time, for example, over the winter, proceed as 

follows: 

1. Use the remote control to shut down all of the inner 

units. 

2. Switch off the internal regulation in the chiller (or the 

remote control). 

3. Have the percentage of glycol is checked by an 

authorised company. 

4. If only water was used in the hydraulic cycle and no 

brine (water and antifreeze), this water must be 

drained from system components in areas susceptible 

to frost during the period of non-operation. When 

the unit is put back into operation, the amount of water 

that has been drained must be refilled! 

5. Check the inner units and the chiller for any visible 

damage. 

6. Clean the inner units and outer parts as described in 

section 5 “Maintenance” and cover the chiller, if possible, 

with a plastic sheet to protect it from weather 

conditions. 

When the unit is put back into operation after a long period 

of non-operation, it must first be checked for external 

damage before operation. 

List of the alarm codes 

10 

Alarm Description 

Code Alarm Type AUTO MANUAL 

E00 Remote control defective (open contact) 

E01 High pressure alarm Cycle 1 

E02 Low pressure alarm Cycle 1 

E03 Condenser overheating Cycle 1 

E04 Condenser temperature too high 

E05 Frost protection Cycle 1 activated 

E06 Sensor defective ST 2 outgoing water Cycle 1 

E07 Sensor defective ST 5 condenser Cycle 1 

E21 High pressure alarm Cycle 1 

E22 Lobe pressure alarm Cycle 1 

E23 Condenser overheating Cycle 2 

E24 Condenser temperature too high 

E25 Frost protection Cycle 2 activated 

E26 Sensor defective ST 3 outgoing water Cycle 2 

E27 Sensor defective ST 6 condenser Cycle 2 

E40 Sensor defective ST 1 incoming water 

E41 Flow switch (differential pressure monitor) activated 

E42 Hardware defective 

To protect the unit, the CH-DIN regulation and the C2- 

DIN additional regulation use sensors to check the unit’s 

safety mechanisms for temperature, pressure, internal 

configuration, etc. 

The value display of the CH-DIN regulation indicates the 

alarm code by displaying the letter E followed by two 

numbers. The cause of the alarm can be determined by 

finding the code in the table below. The C2-DIN additional 

module also displays the alarm with a corresponding 

LED. 

On the second parameter level, resetting the alarm can 

be programmed after the malfunction has been fixed 

The alarms are pre-programmed to automatically reset 

at the factory. 

If the alarms have been reprogrammed to be reset 

manually, the alarm must be reset after the problem has 

been fixed by switching the CH-DIN and then on again 

with the ON/OFF/RESET button (see programming example 

below). 

Resetting the alarms after the problem has been fixed 

The alarms can be reset by following the programming process below. As an example, the compressor switched off 

due to a malfunction caused by dirt in the condenser fins. 


Overheating of the 

condenser as a 

result of dirt in the 

fins 

E 

Alarm 

2 1 

Temperature of the 

condenser is lowered 

and the fins of 

the heat exchanger 

are cleaned 

0 

2 

Permanent shutdown 

For environmental safety reasons, the chiller may only 

be disassembled by authorised service centres. 

REMKO GmbH & Co. KG or your contract partner would 

be happy to provide you with the name of a service centre 

in your area. 

ON/OFF 

RESET 

Alarm 

ON/OFF 

RESET 

3 

The second parameter level can be 

programmed to reset the alarms. 

Enter the changed resets in the lefthand 

column. 

All settings made at the factory 

have been pre-programmed to 

AUTOMATIC. 

1

Troubleshooting 

This unit has been designed based on state-of-the-art manufacturing methods and it has been tested repeatedly to 

ensure that it is working properly. However, should problems occur, refer to the following list. 

Problem Alarm Possible cause Check Remedy 

The unit 

does not 

start or it 

switches 

itself off 

automatically. 

The unit is 

either not 

cooling at 

all or only 

a little bit 

Water 

leaks out 

of the unit 

E01/E02 

E21/E22 

E00/E21 

Power failure 

Power fuse / power supply defective 

Are all other electrical components 

working? 

Are all other electrical components 

working? 

Check voltage and wait for the 

unit to start again. 

Maintenance by authorised 

personnel 

Waiting period too short Is the COMP LED blinking? Schedule longer waiting periods 

Regulation is not working 

Incorrect discharge temperature 

or parameter setting 

High-low pressure alarm 

Remote control / Connection 

to C2-DIN defective 

E03/E23 Compressor overheating 

E04/E24 

Liquefaction temperature too 

high 

E05/E25 Frost protection activated 

E06/E07/ 

E26/E27/ 

E40 

E41 

Incorrect electrical rotational 

direction 

Sensors defective ST1 to ST6 

Flow switch (differential pressure 

monitor) activated 

E42 Hardware defective 

Compressor contact defective 

Heating capacity was increased 

Supply temperature too high 

Air in the system 

Liquefaction temperature too 

hot 

Is the LINE LED and to the 

COOL LED lit up? 

Connect current and select the 

COOL operating mode 

Check setting Change setting 

Are the fans rotating? 

Is the pressure in the cold cycle OK? 

Is the display working? 

Is the connection OK? 

Is the temperature of the compressor 

above approx. 100 °C? 

Are the fins clean and have the operating 

ranges been maintained? 

Is the supply temperature 4°C or 

lower? 

It is the alarm activated when the 

sensor is replaced? 

Are the following values OK: 

◊ Volume of current (too large/small) 

◊ No air in the monitoring pipes 

◊ Circulation pump 

◊ Does the monitor switch on and off 

◊ Stop mechanisms are open 

◊ Water pressure too high/low 

Does the regulation function 

smoothly? 

Is the COMP LED lit up and is there 

current on the contact? 

Have checked by authorised 

company 

Replace remote control or reestablish 

connection between 

CH-DIN and C2-DIN 

Maintain operating ranges, clean 

fins 

Clean fins, place unit in the 

shade 

Increase discharge temperature 

Replace defective sensors 

Have checked by authorised 

company 

Have regulation replaced by 

authorised company 

Have the contact or compressor 

replaced by an authorised company 

Has there been a structural change? Maintain safety zones 

Is the supply temperature approx. 

5 ... 10 °C? 

Have automatic ventilators been 

mounted on the highest possible position? 

Are the fins clean and have the operating 

ranges been maintained? 

Reduce discharge temperature 

Ventilate manually or integrate 

ventilators 

Incorrect parameter settings Check settings Change settings 

Sporadic operation because 

cooling requirements are too 

low 

Leaks in pipes or defective insulation 

Did the phase-sequence relay switch 

through? 

Has the system been designed for 

smaller measurements? 

Are there leaks and have all lines 

been insulated? 

Change the rotational direction 

Clean fins, place unit in the 

shade, maintain operating ranges 

Increase the quantity of water by 

installing a storage module 

Seal and insulate 

11

Technical Data 

Type RKW INOX 

Cooling capacity 1) 

(1) Capacities based on ISO R 859A; room temperature of TK 27°C/FK 19°C - outside temperature 35°C, supply 7 °C, discharge 12 °C 

(2) Noise measurement DIN 45635 - 01 - KL3 in intervals of 10 meters 

(3) Only when brine is used (water with 34% glycol) 

(4) Power data per cooling cycle 

12 


kW 10,0 16,0 25,6 35,9 44,3 78,0 98,0 

Air performance max. m³/h 3000 6200 10000 17000 19000 35000 39000 

Number of fans / diameters -/mm 2/450 2/450 1/630 2/630 2/630 2/800 2/800 

Rated flow rate water m³/h 1,8 2,8 4,4 6,2 7,6 13,4 16,9 

Minimum flow rate water m³/h 1,3 1,9 3,0 4,5 5,2 8,8 10,8 

Pump pressure max. kPa 70 90 74 - - - - 

Internal pressure losses for rated flow rate kPa 25 37 40 32 29 19 20 

Available external pressure differential kPa 45 53 34 - - - - 

Operating pressure max. kPa 250 

Incoming water chiller inch 1¼ 1 2 2 x 2 

Outgoing water chiller inch 1¼ 1½ 2 2 x 2 

Filling connection inch 1/2 - 

Sound pressure level 2) 

dB(A) 43 44 49 48 48 53 54 

Refrigerant R 407C 

Cold cycles/Compressor type - 1 Scroll 2 Scroll 2 Tandem Scroll 

Refrigerant amount kg 5,0 4,1 8,0 2x7,4 2x7,6 2x20,5 2x21 

Contents storage tank l 45 45 108 - - - - 

Operating range outgoing water °C + 5 °C to + 15 °C 

Operating range outside temperature 3) °C - 10 °C to + 43 °C 

Nominal current consumption 

per compressor 4) 

A 8.0 12.8 18.8 26.3 2x16.3 4x14.6 4x18.4 

Nominal current consumption. max. A 8.0 12.8 18.8 26.3 32.6 58.5 73.5 

Electrical connection V/Ph/Hz 400/3~,N,PE/50 

Power consumption. max. kW 4.4 7.1 11.2 15.7 19.4 36.0 45.2 

Starting current A 49 101 167 2x90 2x120 2x116 2x127 

Supplied fuse protection (recommended) A 20 20 25 35 50 80 100 

Dimensions Width mm 1150 1150 1340 2370 2370 2990 2990 

Depth mm 460 460 560 560 560 1280 1280 

Height mm 1300 1300 1770 1310 1310 1520 1520 

Weight kg 160 197 300 437 461 902 934 

Ref. No. 1611600 1611610 1611620 1611635 1611645 1611650 1611660

Dimensions 

RKW 1000 INOX / 1600 INOX 

F 

E 

D 

K 

L 

A 

RKW 3600 INOX / 4500 INOX 

RKW 8000 INOX / 9800 INOX 

B 

C 

RKW 2600 INOX 

A B F 

A B 

A B F 

Model size 1000 INOX 1600 INOX 2600 INOX 3600 INOX 4500 INOX 8000 INOX 9800 INOX 

A mm 1150 1150 1340 2370 2370 2990 2990 

B mm 460 460 560 560 560 1280 1280 

C mm 1300 1300 1770 1310 1310 1520 1520 

D mm 625 625 90 715 715 900 900 

E mm 615 615 1610 1180 1180 520 520 

F mm 220 220 160 1100 1100 1300 1300 

G mm - - - - - - - - - - - - - - - 290 290 

K incoming water inch 1 ¼ ‘‘ inside 1 ¼ ‘‘ inside 1 ¼ ‘‘ inside 2 ‘‘ inside 2 ‘‘ inside 2 x 2 ‘‘ inside 2 x 2 ‘‘ inside 

L outgoing water inch 1 ¼ ‘‘ inside 1 ¼ ‘‘ inside 1 ½ ‘‘ inside 2 ‘‘ inside 2 ‘‘ inside 2 x 2 ‘‘ inside 2 x 2 ‘‘ inside 

M filling connection (water) inch ½ ‘‘ outside ½ ‘‘ outside ½ ‘‘ outside - - - - - - - - - - - - 

Fan / number Ø mm / - 450 / 2 450 / 2 630 / 1 630 / 2 630 / 2 800 / 2 800 / 2 

Depending on the size of the unit, a certain number of vibration absorbers are supplied with the unit. These have a height of approx. 30 mm 

up to the model size RKW 4500 I, and of approx. 45 mm for model size RKW 8000 I and higher which must be added to the heights above 

(measurement C). 

K 

D 

L 

E 

K 

G 

E 

D 

L 

F 

D 

E 

K 

C 

13 

C 

C

Assembly Instructions for 

Service Personnel 

Prior to installation 

The following must be checked and complied with before 

the unit is actually assembled: 

◊ Ensure that the contents of the package are complete 

and that the unit has no visible damage results 

in from transport. Any problems must be communicated 

immediately to your contract partner and the 

shipping company. Subsequent complaints will not 

be acknowledged. 

◊ Place the unit in its original packaging as close as 

possible to the location where it will be assembled. 

This will prevent damage resulting from transport. 

◊ Ensure that the foundation for installing the chiller is 

level, even, firm and resistant. 

Pay attention to the load capacity of the foundation. 

◊ Choose a place for installation which guarantees a 

free air intake and air discharge of the unit and 

where the unit is not exposed directly to the sun or 

other heat sources. 

◊ The air discharge of the unit should be in accordance 

with the main direction of the wind. 

◊ Keep all distances which are described in the chapter 

“minimum distances” 

◊ Prior to installation, the electrical connection values 

must be checked for consistency with the data on 

the type plate. 

◊ All indoor units must have a separate electric supply. 

◊ An electric control cable to the chiller is not necessary. 

Unit Assembly 

The REMKO RKW INOX chillers have been designed 

and built for outside setup. Because a lot of heat is expelled 

to the surroundings, make sure that when you select 

a location for setup, air can flow freely in and out of 

the unit. 

It is generally not advisable to set up the unit in enclosed 

rooms because adequate air exchange with the 

outside air cannot be guaranteed and there must be an 

equal amount of air intake and output. 

An adequate air exchange can only be guaranteed if a 

corresponding cross ventilation supplies fresh air to the 

room at least at the air flow rate of the chiller. Otherwise 

the room will heat up and the chiller will switch off due to 

a malfunction. This occurs once the room temperature 

exceeds the upper operating range of the set value of 

the safety mechanism. 

14 

General information 

◊ The chillers are units for outside setup. 

◊ Wind protection devices must be set up if the air expelled 

from the unit does not flow in the same primary 

direction as the wind. 

◊ You must ensure that the wind protection does not 

adversely affect the air supply to the unit. 

◊ When setting up the unit, ensure that adjacent 

rooms or buildings are not exposed to adverse effects 

from noise emitted from the units. You should 

avoid setting up the units on large, reverberant surfaces, 

such as between reflecting buildings, because 

this can increase the noise level. 

◊ The chillers must be mounted on vibration absorbers 

or foundations which prevent vibrations (to be done 

by the customer). 

◊ If the chillers are also used during the winter months, 

the unit must be assembled high enough so that it is 

protected from snow. The minimum height is 20 cm 

above the normal amount of snow expected. 

◊ To ensure that the unit operates smoothly, adequate 

safety distances to walls and other obstacles must 

be maintained during setup. 

Minimum distances 

These safety zones ensure that air can flow freely in 

and out of the unit, that maintenance and repair work 

can be performed and to protect the unit from damage. 

The figure below indicate the minimum distances that 

must be maintained to ensure that the units operate 

properly. 

RKW 1000 / 1600 INOX 

500 

300 1000 

300 500 


500 

1000 

300 300 600

RKW 3600 / 4500 INOX with storage module 

400 

RKW 8000 / 9800 INOX 

1200 

500 

600 

600 


1200 

Installation of the units 

400 400 

RKW 3600 / 4500 INOX without storage module 

400 

500 


400 400 

The units are supplied with vibration absorbers in this 

series. These must be connected to statically permissible 

and level building or structural components. 

The locations for attachment described below are for 

fastening the vibration absorbers to the chillers. To establish 

an attachment to a subconstruction, the dimensions 

of the vibration absorbers must be observed. 

3000 

Vibration absorbers 

RKW 1000 - 4500 INOX RKW 8000 – 9800 INOX 

43 43 

Attachment locations for chillers 



RKW 3600 / 4500 INOX with storage module 

770 

RKW 8000 / 9800 INOX 

998 

735 

770 

400 

500 

RKW 3600 / 4500 INOX without storage module 

950 

8Ø 

60 

45 

66 66 

417 950 

430 770 

933 998 

M12 x 35 

500 

500 

13Ø 

1150 

15

Hydraulic connections 

The hydraulic connections are located on the back of 

the units. 

The RKW 1000 and 1600 INOX units are ready to be 

connected upon shipment. 

For the RKW 2600, 3600 and 4500 INOX units, it is 

possible to separate the plate heat exchanger of the 

chiller and the storage module mounted underneath this. 

For the RKW 2600 INOX unit, the plate heat exchanger 

and the storage module are connected hydraulically by 

the pipe connection installed at the factory. 

For the RKW 3600 and 4500 INOX units, the plate heat 

exchanger and the separately ordered storage module 

must be connected upon assembly with the supplied 

pipe connection. If the module is set up separately, the 

necessary connection line must be installed by the customer 

The RKW 8000 and 9800 INOX units in this series are 

supplied without hydraulics. The required components 

are selected by the person who develops the system. 

General information 

◊ We recommend equipping the connections with 

shut-off valves for service purposes. 

◊ Additional, automatic ventilation valves must be 

mounted at the highest location of the installation in 

the supply and discharge pipes. 

◊ To prevent vibrations from being transferred, compensators 

(flexible lines) should be used between 

the fixed pipe installation and the chiller. 

◊ All pipe lines must be insulated to protect them from 

condensation. According to the HeizAnlV (German 

Heating Systems Ordinance), a 50% insulation diameter 

must be planned for cooling mode and a 

100% insulation diameter for cooling and heating 

mode. 

◊ To prevent the unit from becoming dirty, a water filter 

(approx. 16 meshes pro cm²) should be installed in 

the discharge line. 

◊ The water pipes may not exert any static strain on 

the chiller. 

◊ A second key or pliers must be used to mount the 

pipe lines on the RKW so as not to create any strain 

on the pipe lines in the inside of the unit. 

◊ If the chiller is only initially operated with a single part 

of the overall system, the flow rate of the missing 

system parts must be stimulated by pipe regulating 

valves. 

◊ To increase the run time of the unit, we recommend 

using a storage module or cold water pipes that are 

slightly larger to increase the volume if the necessary 

capacity of the inner units is considerably smaller 

than the cooling capacity of the chiller. 

◊ The hydraulics must be set up in such a way that the 

predefined minimum flow rate is reached. 

16 

Connecting the water pipes 

The RKW 1000, 1600 and 2600 INOX models in this 

series are equipped with a cold water storage module 

as a compact unit. The 3600, 4500, 8000 and 9800 

INOX models are supplied in this series without hydraulics 

for technical reasons. The water components including 

the plate heat exchanger and the differential 

pressure monitor are located in the chiller. The hydraulic 

connections are found on the backs of all units. 

For models RKW 3600 and 4500 INOX and higher, a 

separate storage module can be mounted underneath 

the chiller or somewhere else (e.g. inside the building). 

So as not to transfer the vibrations of the chiller to the 

system parts, the lines are connected to the unit by 

compensators (flexible lines). We recommend equipping 

the connections with shut-off valves for service purposes. 

Shut-off valve Compensator 

Model 

Water 

incoming outgoing 

1000 INOX 1 ¼ ‘‘ inside 1 ¼ ‘‘ inside ½ ‘‘ outside 

1600 INOX 1 ¼ ‘‘ inside 1 ¼ ‘‘ inside ½ ‘‘ outside 

2600 INOX 1 ¼ ‘‘ inside 1 ½ ‘‘ inside ½ ‘‘ outside 

3600 INOX 2 ‘‘ inside 2 ‘‘ inside - 

4500 INOX 2 ‘‘ inside 2 ‘‘ inside - 

3600 INOX with 

storage module 

4500 INOX with 

storage module 

Static attachment RKW connection 

8000 INOX 2 x 2 ‘‘inside 

9800 INOX 2 x 2 ‘‘inside 

2 ‘‘ inside 2 ‘‘ inside ½ ‘‘ outside 

2 ‘‘ inside 2 ‘‘ inside ½ ‘‘ outside 

2 x 2 ‘‘ inside 

2 x 2 ‘‘ inside 

Filling connection 

- 

-

Hydraulic Connections 



Incoming water 

Outgoing water 



RKW 3600 / 4500 INOX with separate storage module 





RKW 3600 / 4500 INOX with the storage module below 



Hydraulic connection RKW 8000 / 9800 INOX 



Storage module for 

RKW 3600 to 9800 INOX 

For the RKW 3600, 4500, 8000 and 9800 INOX models, 

it is not necessary to use a storage tank for certain 

types of use 

Other types of application absolutely require the volume 

of water to be increased, for example, to extend the operating 

time of the chiller and prevent sporadic operation. 

Five storage modules have been designed to meet 

these practical requirements: 

1. Storage module 1 for RKW 3600 and 4500 INOX, 

216 l tank, safety component 3 kPa and MAG, 

without pump, 

Ref.No.: 1611530 

2. Storage module 2 for RKW 3600 and 4500 INOX, 

216 l tank, safety component 3 kPa and MAG, 

including prompt, Vnenn: 6,2/7,6 m³/h, pmax: 124/118 kPa 

Ref.No.: 1611540 

3. Storage module 3 for RKW 8000 and 9800 INOX, 

2 x 216 l tanks, safety component 3 kPa and MAG, 

without pump, 

Ref.No.: 1611545 



including pump, Vrated: 13,4/16,9 m³/h, pmax: 90/82 kPa 

Ref.No.: 1611550 



incl. 2 x pumps, Vrated: 13,4/16,9 m³/h, pmax: 95/65 kPa 

Ref.No.: 1611555 

The storage modules 1 and 2 are to be attached under 

the RKW 3600 and 4500 INOX chillers by means of the 

standard connection line. In Module 2, the circulation 

pump is installed at the factory. 

The storage modules 3, 4 and 5 can be set up on top of 

one another to save space. The circulation pump(s) of 

Modules 4 and 5 cannot be placed inside the modules 

due to the design. They must be set up separately. 

The hydraulic components which are to be placed in an 

easily accessible location include the insulated storage 

tank, a safety component, a manometer, a membrane 

expansion vessel (MAG) and a filling connection with 

ball stop valve. 

17

Storage Module Technical Data 

18 

3600 4500 8000 9800 

Storage module for RKW INOX 1 2 1 2 3 4 5 3 4 5 

Storage contents l 216 2 x 216 

Number of pumps - 1 - 1 - 1 2 - 1 2 

Incoming water / Outgoing 

water 

inch 1½ 1½ 

Filling connection inch 1/2 1/2 

Operating pressure max. kPa 250 250 

Rated volume current water m³/h 6.2 7.6 13.4 16.9 

Minimum volume current 

water 

m³/h 4.5 5.2 8.8 10.8 

Pump pressure max. kPa - 124 - 118 - 90 95 - 82 65 

Storage pressure loss, 

internal 

Available external pressure 

differential 

kPa 5 8 6 10 8 11 10 11 15 13 

kPa - 92 - 89 - 59 66 - 47 32 

Electrical connection V - 3~,400 - 3~,400 - 3~,400 - 

Power/Current consumption kW/A 0.55/1.44 0.55/1.44 - 0.75/1.86 1.1/2.88 - 0.75/1.86 1.1/2.88 

Dimensions Width mm 2370 2 x 2370 

Height mm 535 2 x 535 

Depth mm 560 2 x 560 

Weight when empty, storage kg 123 126 123 126 246 246 

3~,400 

Weight pump kg - 3 - 3 - 4 6 - 4 6 

Ref.No. 1611530 1611540 1611530 1611540 1611545 1611550 1611555 1611545 1611550 1611555 

Storage module dimensions 

Hydraulic operation of the storage module 

Parallel operation Individual operation

Assembling the storage module 

1. Remove the transport packaging and, if applicable, 

assemble the vibration absorbers onto the bottom of 

the storage module. 

If the storage module is to be placed below the 

chiller, the vibration absorbers do not need to be attached. 

2. Attach the storage module horizontally using the 

brackets of the vibration absorbers to a statically permissible 

attachment location. 

If the modules are to be set up on top of one another 

to save space, the vibration absorbers only need to 

be attached to the bottom module. 

3. For hydraulic parallel operation of the storage modules, 

the pipe line connections are to be connected 

depending on the necessary hydraulics. When attaching 

the storage modules below the chiller for the 

RKW 3600 and 4500 INOX modules, the supply connection 

line can be attached. 

4. If the vibrations from the storage module are not to 

be transferred to the pipe line network, compensators 

with the correct dimensions are to be selected. 

Electrical connection 

� 

Type 

Prior to performing any work on the unit, it must be 

unplugged from the power supply and secured 

against being inadvertently switched on! 

Follow these instructions to perform the electrical installation: 

◊ These electrical installations may only be performed 

by authorised service personnel in accordance with 

the relevant regulations. 

◊ The units must always be connected with low-ohm 

protection conductor is with sufficient to dimensions. 

In certain circumstances, the module must be 

grounded as a measure to protect against lightning 

in several places. 

◊ The connection line of the pump is to be guided 

through the respective cable penetration on the back 

of the chillers into the housing in the switch box and 

wired in accordance with the wiring diagram. 

◊ All of the pumps to be installed in the storage modules 

are designed as three-phase alternating current 

motors. The power supply of the pumps is performed 

on the L1, L2, L3, N and PE terminal strips. 

◊ The dimensions of the lines is based on the local 

conditions. The connection capacity of the units can 

be found in the table below: 

Electrical connection 

RKW 3600 INOX / 


RKW 8000 INOX / 

RKW 9800 INOX 

400 V, 50 Hz / 3~, N, PE 

Power consumption 0.55 kW 0.55 kW 0.75 kW 

Cur. consumption max. 1.44 A 1.44 A 1.86 A 

Characteristic curve of the pump RKW 3600 / 4500 

INOX storage module 2 

Characteristic curve of the pump RKW 8000 / 9800 


Characteristic curve of the pump RKW 8000 / 9800 


19

Antifreeze to prevent freezing 

During cold seasons of the year, it is possible that the 

water in the chiller will freeze at temperatures below 0°C 

which can cause damage, for example, to the plate heat 

exchanger. The same applies to installed connection 

lines and system parts in rooms not susceptible to frost. 

For this reason, we recommend mixing the water with 

an adequate amount of antifreeze (e.g. antifreeze N). 

If brine (a mixture of water and frost protection) is not 

used in the hydraulic cycle, the water is to be drained 

from the system parts in areas susceptible to frost during 

non-operation in the winter. 

Appropriate shut-off and drainage mechanisms are to 

be used. The amount of water drained out must be refilled 

before the next cooling season begins. 

If the chiller is to be used throughout the whole year, e. 

g. to air-condition a computer room) the hydraulic cycle 

must be operated with brine. 

When using brine, you must make sure that the pressure 

loss increases as a result of the changing density 

in the hydraulic cycle. Whether or not to use brine must 

be considered when the hydraulic cycle is being set up. 

The variable technical data can be found in the table below: 

Percentage 

of 

ethylene 

glycol 

Cable Remote Control 

The cable remote control can be purchased as an accessory. 

It is used to query and program the chiller from 

a remote location. 

In the factory, all models are programmed using the remote 

control. 

20 

Antifreeze 

Correction factors when using a brine 

made of ethylene glycol * and water 

Power 

Cooling 

consump- Flow rate 

capacity 

tion 

Pressure 

loss 

Vol. % °C KL KPE KV KD 

0 0 1 1 1 1 

20 -11 0.96 0.995 1.04 1.19 

34 -20 0.95 0.990 1.09 1.35 

40 -25 0.925 0.985 1.105 1.51 

* We recommend an ethylene glycol with inhibitors as 

corrosion protection, e.g. antifreeze N or L. 

Where the heat medium comes into contact with 

drinking water or food, antifreeze L is to be given 

preference because it contains the physiologically 

harmless substance 1.2 propylene glycol. 

The data provided in the table refers to antifreeze N. 

Antifreeze L has other correction factors and thus a 

different pressure loss! 

Electrical connection of the cable remote control 

The remote control comes with an operating module 

TS-W, the additional regulation module CS-DIN/TTL 

and an interface line. 

CS-DIN/TTL 

Install the remote control as follows: 

TS-W 

The operating module is to be mounted in the desired 

location. The operating module is connected to the 

RKW with two, two-wire lines with a maximum length of 

50 m. One line is used to transfer data and the other to 

supply the current 12 V~ of the operating module. It is 

not necessary to use an additional transformer. 

The programmed data is transferred to the CH– DIN 

regulation by an interface line. 

1) Place the two, two wire connection lines between the 

location where the remote control is to be assembled 

and the switch box of the chiller. The minimum 

cross-section is Cu 1.5 mm². The max. current may 

not fall below 2 %. 

2) Remove the assembly back panel of the operating 

module and attach it to the setup location. 

3) Clamp the lines to the terminal strips of the electronic 

board and make sure that the polarity is correct. 

Lock the operating module into place in the assembly 

back panel. 

4) Insert the additional module into the switch box of 

the chiller. 

5) Clamp the lines to the terminal strips of the previously 

mounted additional regulation module in the 

switch box of the chiller. 

6) Using the interface line, you can connect the additional 

regulation module and the CH–DIN regulation. 

7) Test the function of the remote control.

Electrical Connection 

� 

The following electrical connections must be made: 

◊ Connecting the power supply 

◊ Connecting the cable remote control if applicable 

Please follow the instructions below to install the electrical 

connections: 

◊ The inner units function independently of the chiller. 

An electrical control line is hence not necessary. 

◊ The electrical connections are to be performed as 

fixed connections in accordance with the relevant 

regulations. 

◊ An all-polo separating switch is to be installed in the 

power line in front of the unit. 

◊ The power line must be insulated adequately by the 

customer and the line drop may not fall below the 

permissible values. 

◊ Make sure that the electrical system is suitable to 

supply the required operating current for operating 

the unit and any other units that are already in operation. 

◊ Prior to installation, if connections are made to existing 

system parts, you must check that the line has 

the right dimensions for unit consumption. 

◊ The units must always be connected with low-ohm 

protection conductors with sufficient dimensions. In 

certain circumstances, the module must be grounded 

as a measure to protect against lightning in several 

places (especially when plastic pipes are used). 

� 

Electrical installations may only be performed by 

authorised service personnel. Prior to performing 

any work on the unit, it must be unplugged from 

the power supply. 

Description of the CH-DIN inputs and outputs 

All electrical connections such as power input, cable remote 

control, etc., are to be made in the switch box of 

the unit. The lines to be laid must be guided through the 

appropriate cable penetrations on the back of the unit 

into the housing. 

All units require a three-phase alternating current connection. 

The power line is to be guided through the L1, 

L2, L3, N and PE terminal strips. 

The line dimensions are based on the local conditions. 

The connection capacity of units can be found in the table 

below: 

Type RKW INOX 


Electrical connection 400 V /3~, N. PE / 50 Hz 

Power consumption kW 4.4 7.1 11.2 15.7 19.4 36.0 45.2 

Cur. Consumption max. A 8 12.8 18.8 26.3 32.6 58.5 73.5 

Start-up current A 49 101 167 2x90 2x120 2x116 2x127 

Fuse protection 

customer-side 

A 20 20 25 35 50 80 100 

Warning! The units are equipped with a phase-sequencer relay that prevents the unit from operating if the rotational 

direction of the electrical connection is wrong. If the chiller remains neutral (i.e. no current) when being 

put into operation, the rotational field must be switched. 

Terminal 

strip 

Normal status 

Input / 

Output 

Function Connections 

01 – 02 ST 1 Incoming water - Sensor PTC - input 

03 – 04 ST 2 Outgoing water – Sensor PTC - input 

05 – 06 ST 5 Condenser – Sensor PTC - input 

07 – 08 closed AT 1 High pressure switch Neutral contact 

09 – 10 closed AT 3 Low pressure switch Neutral contact 

11 – 12 closed AT 5 Not in use Neutral contact 

13 – 14 12 V ~ Tr Current supply 12 V ~, 50 Hz 

15 – 16 Closed when pump is in operation AT 9 Differential pressure monitor Neutral contact 

15 – 17 AT 7 Heating-cooling removed Neutral contact 

15 – 18 closed AT 10 On Off, remote control contact for heating pump Neutral contact 

19 – 20 RL 1 Global shut-off Max. 48 V ~, 200 mA 

22 – 23 RL 2 Defrost heating / Boiler signal 230 V ~, 50 Hz, 4,0 A 

22 – 24 RL 4 Compressor 230 V ~, 50 Hz, 0,4 A 

22 – 25 RL 8 Circulation valve (heating pump only) 230 V ~, 50 Hz, 0,4 A, 

21 – 22 RL 10 Pump switch contact 230 V ~, 50 Hz, 4,0 A 

42 – 43 TK 1 Fan regulation - output Phase regulation 

21

Wiring Diagram RKW 1000 INOX / 1600 INOX 

22 

ST 1: Temperature sensor 





Verflüssiger 

HP Pressure absorber 

High-pressure 

LP Pressure absorber 

Low pressure 

Fan rotation 

regulation board 

(winter regulation) 

Verflüssiger 

fan 1 

Microprocessor 

regulation 

Wiring Diagram RKW 2600 INOX 






Condenser 


High pressure 


Low pressure 

Fan rotation 

regulation board 


Overheating 

protection 

compressor 

Verflüssiger 

fan 2 


regulation 

Potentialfreier 

Kontakt for 

regulating cooling 

EXTERNAL 

Neutral contact 

for cooling 

regulation 

EXTERNAL 

Differential 

pressure 

monitor 

INTERN 

Flow switch 

EXTERNAL 

Circulation 

pump 

Differential 

pressure 

monitor IN- 

TERNAL 

Condenser motor 

Circulation 

pump 

Terminal strip M2 

Compressor 

motor 

Condenser 

fan 1 

Relay condenser 


Relay compressor 

Input 

400 V / 3 Ph ~ / 50 Hz 

Input 

400 V / 3 Ph ~ / 50 Hz 



Phase-sequence relay 

Phase-sequence relay

Electrical Wiring Diagram RKW 3600 INOX / 4500 INOX 

ST 1: Temperature 



sensor outgoing water 


sensor 


High pressure 


Low pressure 


regulation 

Additional 

module 

Overheating protection condenser 

Overheating protection condenser 1 

Neutral contact 

for cooling 

regulation 

EXTERNAL 

Differential 

pressure 

monitor 

INTERNAL 

Condenser 

fan 1 

Connecting the Remote Control RKW 1000 INOX to 9800 INOX 

Assembly Instructions 

CH – DIN regulation / 

C2 – DIN regulation 

1. Place the two connection lines with a minimum 

cross-section of Cu 1.5 mm² between the RKW and 

the operating module (max. 50 m). 

BUS 

2. Connect the operating module electrically. 

3. Switch the RKW so that it is neutral (i.e. no current) 

and connect the 250 mm long bus-interface line to 

the additional module. 

4. Connect the line of the data transfer to the terminal 

strips 23 and 24 (pay attention to polarity) of the additional 

module and the terminal strips on the transformer 

for the current supply. 

12V 12V in out 

BUS 

Compressor motor 1 

Compressor motor 2 

Terminal 

strip 

M2 

Condenser 

fan 2 

Frequency block 

Frequency block 

Circulation pump 

Fan rotation regulation 

board 

TK 1 and TK 2 


L1 N 

Additional module for 

the remote control 

Operating module 

TS-W 

CS-DIN/TTL 

20 21 22 23 24 

Input 

400 V / 3 Ph ~, N, PE 

50 Hz 

12V 

12V 

Pri L1 

230V~ N 


Transformer 220 / 12 V~ 

in the switch box RKW 

Maximum line length 

50 meter 

23 

Phase- 

sequence 

relay

Electrical Wiring Diagram RKW 8000 INOX / 9800 INOX 

Hydraulic System 

Hydraulic Diagram RKW 1000 / 1600 INOX 

Hydraulic Diagram RKW 2600 to 4500 INOX 

24 





High pressure 


Low-pressure 

13 

14 

11 

10 

12 

15 

12 

14 

10 

9 

5 


regulation 

15 

9 

Additiona 

module 

Klemmleiste M2 

16 

17 

18 

16 

13 

17 

18 

Potentialfreier 

Kontakt für die 

Ansteuerung 

Kühlen 

EXTERN 

8 

8 

7 

7 

Circulation pump 

6 5 

4 

6 

4 

Overheating protection 

Compressors 1 and 2 

3 

3 

2 

2 

1 

1 

Winter regulation 

Overheating protection 

Compressors 3 and 4 

Hydraulic Diagram RKW 8000 / 9800 INOX 

10 

P 

15 

Frequency 

block 

Compressor 1 

Condenser fan 

1 and 2 

16 

18 

Compressor 3 

1 Shut-off element 

2 Ventilation 

3 Filling connection 

4 Temperature display 

5 Pressure display 

6 Water filter 

7 Static attachment 

8 Compensator 

9 Circulation pump 

10 Differential pressure monitor 

11 Ventilator 

12 Storage 

13 Safety valve 

14 Expansion vessel 

15 Stainless steel heat exchanger 

16 Drainage unit connection 

17 Filling connection / Drainage connection 

18 Supply unit connection 

19 Safety assembly 

8 

1 

7 

Winter 

regulation 

Input 

400 V / 3 Ph~, N PE 

50 Hz 

4 

12 

5 

9 6 

17 

19 


2 

Compressor 2 

Compressor 4 

1 

14 

1 

Phase- 

sequence 

relay

Summer Operation Cooling Only 

Winter Operation Cooling and Heating 

Initial Operation 

Checks prior to operation: 

◊ Prior to operation, the electrical connection values 

and the data on the type plate must be checked for 

consistency. 

◊ You must ensure that all electrical connections have 

been made in line with the requirements of the local 

power supply company as well as national regulations. 

◊ The water lines must be clean and free of impurities 

. For this purpose, the lines should be rinsed out 

twice or three times to ensure that all foreign matter 

has been removed from the lines. 

◊ Make sure that all shut-off valves in the cold water 

lines are opened. 

◊ Make sure that the temperature sensors (condenser, 

supply and discharge / protection against freezing) 

are in the correct positions and that the water lines 

are connected properly to the input and output. 

◊ One important prerequisite is that all lines are filled, 

ventilated and have been checked for leaks. The 

system pressure can be read on the outside of the 

unit on the manometer. The system pressure may 

be a maximum of 2.5 bar. Initial pressure during 

non-operation 1.5 – 2.0 bar. 

◊ If the system is being operated with antifreeze, make 

sure that the concentration is correct. 

◊ The electrical lines of the system must be checked 

that they are attached properly to the terminal strips. 

◊ Prior to operation, all screws in the water system 

must be checked to ensure that they are in the 

proper position and do not leak. 

25


The unit must be put into operation by the manufacturer 

or one of his appointed representatives. All regulation, 

control and safety mechanisms must be checked to ensure 

that they are working properly and have the correct 

settings. 

Follow the instructions below to put the unit into operation: 

1. Remove the housing cover. 

2. Make sure that the shafts in the circulation pumps 

can turn freely. To do this, remove the plug 

(depending on the pump type) and turn the shaft or 

remove the housing cover by taking off the four 

screws and then rotate the shaft. 

3. Make sure that there is no dirt. 

4. Reassemble the pump in the opposite order and select 

the highest performance level for multi-phase 

circulation pumps. 

5. Make sure that the shut-off valves of the hydraulic 

lines are open and set the pipe regulating valves to 

the corresponding flow rate. 

6. Make sure that all pipes and valves in the system 

have been insulated correctly. 

7. Fill the system with water or a pre-mixed water-glycol 

mixture. 

8. Ventilate the entire system and the pump. 

9. Make sure that there is no air in the differential pressure 

monitor line. If there is, ventilate it at the connection. 

10.Check the entire system for leaks. 

11.Check the insulation of all components. 

12.Check that the operating current is consistent with 

the power current. 

13.Before switching the unit on, make sure that the 

power input and the condenser (s) have the correct 

rotational field. If an incorrect rotational field has 

been connected, the integrated phase-sequence relay 

interrupts the supplied current of the regulation. 

14.Switch the chiller on by pressing ON / OFF / RESET 

and select the cooling operating mode via MODE. If 

the drainage temperature is warmer than the factory 

setting of 12 °C, the COMP. display blinks and the 

condenser begins to run in approx. three to five minutes. 

15.If the factory setting has been changed, set the desired 

drainage temperature by setting the Parameter 

-02 to the target value, exit the parameter level 

and press the ON / OFF / RESET button twice. 

16.If the drainage target temperature falls below 8 °C in 

the parameter level, both displays begin blinking. 

You must then select a higher drainage temperature. 

17.The supply temperature is approx. 5 Kelvin under the 

drainage temperature for the rated flow rate. 

26 

18.If the supply temperature is below the factory setting 

of 4°C, the unit registers a malfunction (E05/E25). In 

this case, the drainage temperature must be set 

higher. If the difference between the supply and return 

temperatures is too high or too low, check the 

flow rate. 

19.The circulation pump starts and the regulation 

checks the volume current via the flow switch 

(differential pressure monitor). If the amount of water 

is too small, the unit registers a malfunction and the 

cold cycle is not released. 

20.In this case, the source of the error (pipe regulating 

valve not set, all valve assemblies of the inner units 

are still closed, pipe dimensions of the system are 

not correct) must be identified and fixed. 

21.The cold cycle switches on after a time delay of approx. 

3 to 5 minutes. 

22.Check the system pressure, system height between 

chiller and the highest inner unit and the water volume 

and set, if necessary, the filling pressure of the 

membrane expansion vessel to the system. 

23.Reattach the covers. 

24.Train the operator in system operation. 

Environment and Recycling 

Important information about recycling! 

Only authorised personnel may come into contact with 

the cold cycle. This ensures that refrigerant does not escape 

into the environment when the unit is being repaired. 

Both the refrigerant and the system parts are subject to 

special requirements for disposal. 

� 

The refrigerant in use is a safety refrigerant. This 

means that, should damage occur, the quantities 

released will not cause injury to the respiratory 

systems of people and animals. Do not touch the 

liquid refrigerant as it can freeze the skin! 

Service and Guarantee 

For the guarantee to be valid, the purchaser or his customer 

must completely fill out the "guarantee certificate" 

enclosed with all units and send it back to REMKO GmbH 

& Co. KG. 

The units are repeatedly tested at the production site to 

ensure that they are working properly. If a malfunction 

occurs that cannot be eliminated by the operating personnel, 

please contact your dealer or contact person. 

Operation/handling which does not comply with 

these instructions is prohibited! 

� In cases of non-compliance, we assume no liability 

and the guarantee becomes null and void.

REMKO GmbH & Co. KG 

Klima- und Wärmetechnik 

D-32791 Lage • Im Seelenkamp 12 

D-32777 Lage • PO Box 1827 

Phone +49 (5232) 606 - 0 

Fax +49 (5232) 606260

REMKO RKW 1000 â 9800 INOX Stainless Steel Chiller Operation ...

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REMKO RKW 1000 â 9800 INOX Stainless Steel Chiller Operation ...