Kaysun KEM-90 DRS5 Quick start guide

IMPORTANT NOTE:
Thank you very much for purchasing our air conditioner,
Before using your air conditioner, please read this manual carefully and keep it for
future reference.
KEM-90 DRS5
OWNER'S & INSTALLATION MANUAL
DC Inverter Air-cooled Modular Chiller

CONTENTS
ACCESSORIES ................................................................................... 01
1 INTRODUCTION .............................................................................. 01
1.1 use conditions of the unit .......................................................................................01
2 SAFETY CONSIDERATION ............................................................ 02
3 BEFORE INSTALLATION ................................................................ 04
3.1 Handling of the unit ............................................................................................... 04
4 IMPORTANT INFORMATION ON REFRIGERANT .......................... 05
5 SELECTION OF INSTALLATION SITE ............................................ 05
6 PRECAUTIONS ON INSTALLATION ............................................... 06
6.1 Outline dimensional drawing .................................................................................06
6.2 Requirements of arrangement space of the unit ....................................................07
6.3 Space requirements for parallel installation of multiple Modular units .................. 08
6.4 Installation foundation ........................................................................................... 08
6.5 Installation of damping devices .............................................................................09
7 CONNECTION DRAWING OF PIPELINE SYSTEM ........................ 10
8 OVERVIEW OF THE UNIT ............................................................... 10
8.1 Main parts of the uint .............................................................................................10
8.2 Opening the uint ....................................................................................................11
8.3 Outdoor unit PCBs ................................................................................................ 13
8.4 Electric wiring ........................................................................................................19
8.5 Water system installation .......................................................................................27
9 STRAT-UP AND CONFIGRUATION ................................................. 31
10 TEST RUN AND FINAL CHECK ..................................................... 32
10.1 Check item table after installation ....................................................................... 32
10.2 Trial run ........................................................................................................................................... 32

11 MAINTENANCE AND UPKEEP ...................................................... 33
11.1 Failure information and code .................................................................................33
11.2 Data display of wired controller .............................................................................35
11.3 Care and maintenance ..........................................................................................35
11.4 Removing scale ...................................................................................................35
11.5 Winter shutdown ..................................................................................................35
11.6 Replacing parts .................................................................................................... 35
11.7 First startup after shutdown .................................................................................36
11.8 Refrigeration system ............................................................................................ 36
11.9 Disassembling compressor .................................................................................36
11.10 Auxiliary electric heater ........................................................................................36
11.11 System antifreezing .............................................................................................36
11.12 Replacement of safety valve ...............................................................................37
11.13 Information servicing ...........................................................................................38
RECORD TABLE OF TEST RUN AND MAINTENANCE ................................................41
RECORD TABLE OF ROUTINE RUNNING ....................................................................41
12 APPLICABLE MODELS AND MAIN PARAMETERS .................... 42
13 INFORMATION REQUIREMENTS ................................................. 43

1
-15
-10
-5
0
5
10
15
20
25
30
35
40
45
50
55
0 5 10 15 20 25 30
T4[°C]
Two [°C]
COOLINGG
-25
-20
-15
-10
-5
0
5
10
15
20
25
30
35
40
45
50
20 25 30 35 40 45 50 55 60
T4[°C]
Two [°C]
HEATING
-20
-10
0
10
20
30
40
50
0 10 20 30
-25
-15
-5
5
15
25
35
20 30 40 50 60
ACCESSORIES
Unit Installation & Operation Manual
Temperature testing
components of total water
outlet
Transformer C
Quantity 1 1 1 1
Shape
Purpose / Use for installation (only need for setting the main module)
1 INTRODUCTION
1.1 Use conditions of the unit
1) The standard voltage of power supply is 380-415V 3N~50Hz, the minimum allowable voltage is 342V, and the maximum
voltage is 456V.
2) To maintain better performance, please operate the unit under the following outdoor temperature:
KEM-30 DRS4.1 & KEM-60 DRS4.1 KEM-30 DRS4.1 & KEM-60 DRS4.1
Outlet water temperature (°C) Outlet water temperature (°C)
Fig. 1-1-1 Cooling operating range Fig. 1-1-2 Heating operating range
KEM-90 DRS5 KEM-90 DRS5
COOLING HEATING
Two [°C] Two [°C]
Outlet water temperature (°C) Outlet water temperature (°C)
Fig. 1-2-1 Cooling operating rang Fig. 1-2-2 Heating operating range
In cooling mode, the minimum water output of 0°C can be set (the units(KEM-30 DRS4.1&KEM-60 DRS4.1) can be set through the
main control board dial code S12-3, and the unit(KEM-90 DRS5) can be set through the service menu of the wire controller ). When
the set temperature is less than 5 degrees, the water side system must add antifreeze Liquid (concentration above 15%), otherwise
the unit will be damaged.
Ambient temperature (°C)
Ambient temperature (°C)

2
2. SAFETY CONSIDERATION
The precautions listed here are divided into the following types.They are quite important, so be sure to follow them carefully.
Meanings of DANGER, WARNING, CAUTION and NOTE symbols.
i
INFORMATION
Read these instructions carefully before installation. Keep this manual in a handy for future peference.
 Improperinstallationofequipmentoraccessoriesmayresultinelectricshock,short-circuit,leakage,reorother
damagetotheequipment.Besuretoonlyuseaccessoriesmadebythesupplier,whicharespecicallydesigned
for the equipment and make sure to get installation done by a professional.
All the activitie described in this manual must be carried out by a licensed technician. Be sure to wear adequate
personal protection equipment such as gloves and safety glasses while installation the unit or carrying out
maintenance activities.
Contact your dealer for any furthur assistance.
DANGER
WARNING
CAUTION
NOTE
Indicates an imminently hazardous situation which if not avoided, will result in serious injury.
Indicates a potentially hazardous situation which if not avoided, could result in serious injury.
Indicates situations that could only result in accidental equipment or property damage.
Indicates a potentially hazardous situation which if not avoided, may result in minor or moderate injury.
It is also used to alert against unsafe practices.
Explanation of symbols displayed on the indoor unit or outdoor unit
WARNING Thissymbolshowsthatthisapplianceusedaammablerefrigerant.Iftherefrigerant
isleakedandexposedtoanexternalignitionsource,thereisariskofre.
CAUTION This symbol shows that the operation manual should be read carefully.
CAUTION This symbol shows that a service personnel should be handling this equipment with
reference to the installation manual.
CAUTION This symbol shows that a service personnel should be handling this equipment with
reference to the installation manual.
CAUTION This symbol shows that information is available such as the operating manual or
installation manual.
DANGER
Before touching electric terminal parts, turn off power switch.
When service panels are removed, live parts can be easily touched by accident.
Never leave the unit unattended during installation or servicing when the service panel is removed.
Do not touch water pipes during and immediately after operation as the pipes may be hot and could burn your
hands. To avoid injury, give the piping time to return to normal temperature or be sure to wear protective gloves.
 Donottouchanyswitchwithwetngers.Touchingaswitchwithwetngerscancauseelectricalshock.
Before touching electrical parts, turn off all applicable power to the unit.

3
WARNING
Servicing shall only be performed as recommended by the equipment manufacturer. Maintenance and repair
requiring the assistance of other skilled personnel shall be carried out under the supervision of the person
competentintheuseofammablerefrigerants.
Tear apart and throw away plastic packaging bags so that children will not play with them.Children playing with
plastic bags face danger by suffocation.
Safely dispose of packing materials such as nails and other metal or wood parts that could cause injuries.
 Askyourdealerorqualiedpersonneltoperforminstallationworkinaccordancewiththismanual.Donotinstallthe
unityourself.Improperinstallationcouldresultinwaterleakage,electricshocksorre
 Besuretouseonlyspeciedaccessoriesandpartsforinstallationwork.Failuretousespeciedpartsmayresultin
waterleakage,electricshocks,re,ortheunitfallingfromitsmount.
 Installtheunitonafoundationthatcanwithstanditsweight.Insufcientphysicalstrengthmaycausetheequipment
to fall and possible injury.
Perform specified installation work with full consideration of strong wind, hurricanes, or earthquakes. Improper
installation work may result in accidents due to equipment falling.
 Makecertainthatallelectricalworkiscarriedoutbyqualiedersonnelaccordingtothelocallawsandregulations
and this manual using a separate circuit. Insufficient capacity of the power supply circuit or improper electrical
constructionmayleadtoelectricshocksorre.
Be sure to install a ground fault circuit interrupter according to local laws and regulations. Failure to install a ground
faultcircuitinterruptermaycauseelectricshocksandre.
 Makesureallwiringissecure.Usethespeciedwiresandensurethatterminalconnectionsorwiresareprotected
fromwaterandotheradverseexternalforces.Incompleteconnectionorafxingmaycauseare.
When wiring the power supply, form the wires so that the front panel can be securely fastened. If the front panel is
notinplacetherecouldbeoverheatingoftheterminals,electricshocksorre.
After completing the installation work, check to make sure that there is no refrigerant leakage.
Never directly touch any leaking refrigerant as it could cause severe frostbite.Do not touch the refrigerant pipes
during and immediately after operation as the refrigerant pipes may be hot or cold, depending on the condition of
therefrigerantowingthroughtherefrigerantpiping,compressorandotherrefrigerantcycleparts.Burnsorfrostbite
are possible if you touch the refrigerant pipes. To avoid injury, give the pipes time to return to normal temperature
or, if you must touchthembe sure to wear protective gloves.
Do not touch the internal parts (pump, backup heater, etc.) during and immediately after operation. Touching the
internal parts can cause burns. To avoid injury, give the internal parts time to return to normal temperature or, if you
must touch them, be sure to wear protective gloves.
Do not use means to accelerate the defrosting process or to clean,
other than those recommended by the manufacture.
The appliance shall be stored in a room without continuously operating
ignitionsources(forexample:openames,anoperatinggasappliance
or an operation electric heater.)
Do not pierce or burn.
Be aware that refrigerants may not contain an adour.
DANGER
Ground the unit.
Grounding resistance should be according to local laws and regulations.
Do not connect the ground wire to gas or water pipes, lightning conductors or telephone ground wires.
Incomplete grounding may cause electric shocks.
- Gas pipes: Fire or an explosion might occur if the gas leaks.
- Water pipes: Hard vinyl tubes are not effective grounds.
- Lightning conductors or telephone ground wires: Electrical threshold may rise abnormally if struck by a lightning
bolt.
Install the power wire at least 3 feet (1 meter) away from televisions or radios to prevent interference or noise.
(Dependingontheradiowaves,adistanceof3feet(1meter)maynotbesufcienttoeliminatethenoise.)
 Donotwashtheunit.Thismaycauseelectricshocksorre.Theappliancemustbeinstalledinaccordancewith
national wiring regulations. If the supply cord is damaged, it must be replaced by the manufacturer, its service
agentorsimilarlyqualiedpersonsinordertoavoidahazard.
Caution:Riskofre/
ammablematerials

4
Do not install the unit in the following places:
- Where there is mist of mineral oil, oil spray or vapors. Plastic parts may deteriorate, and cause them to come
loose or water to leak.
- Where corrosive gases (such as sulphurous acid gas) are produced. Where corrosion of copper pipes or
soldered parts may cause refrigerant to leak.
- Where there is machinery which emits electromagnetic waves. Electromagnetic waves can disturb the control
system and cause equipment malfunction.
-Whereammablegasesmayleak,wherecarbonberorignitabledustissuspendedintheairorwherevolatile
ammablessuchaspaintthinnerorgasolinearehandled.Thesetypesofgasesmightcauseare.
- Where the air contains high levels of salt such as near the ocean.
-Wherevoltageuctuatesalot,suchasinfactories.
- In vehicles or vessels.
- Where acidic or alkaline vapors are present.
Children should not play with the unit. Cleaning and user maintenance should not be done by children without
supervision.Children should be supervised to ensure that they do not play with the appliance.
This appliance is intended to be used by expert or trained users in shops, in light industry and on farms, or for
commercial use by lay persons
 Ifthesupplycordisdamaged,itmustbereplacedbythemanufactureroritsserviceagentorasimilarlyqualied
person in order to avoid a hazard.
DISPOSAL: Do not dispose this product as unsorted municipal waste. Collection of such waste seperatelly for
special treatment is necessary. Do not dispose of electrical appliances as municipal waste, use seperate collection
facilities. Contact your local goverment for information regarding the collection systems available. If electrical
appliancesaredisposedofinlandllsordumps,hazardoussubstancecanleakintothegroudwaterandgetinto
the food chain, damaging your health and well-being.
The wiring must be performed by professional technicians in accordance with national wiring regulation and this
circuit diagram. An all-pole disconnection device which has at least 3mm seperation distance in all pole and a
residualcurrentdevice(RCD)withtheratingnotexceeding30mAshallbeincorporatedinthexedwiringaccording
to the national rule.
 Conrmthesafetyoftheinstallationarea(walls,oors,etc.)withouthiddendangerssuchaswater,electricity,
and gas.Before wiring/pipes.
Before installation , check whether the user's power supply meets the electrical installation requirements of
unit (including reliable grounding , leakage , and wire diameter electrical load, etc.). If the electrical installation
requirementsoftheproductarenotmet,theinstallationoftheproductisprohibiteduntiltheproductisrectied.
 Wheninstallingmultipleairconditionersinacentralizedmanner,pleaseconrmtheloadbalanceofthe three-
phase power supply, and multiple units are prevented from being assembled into the same phase of the three-
phase power supply.
 Productinstallationshouldbexedrmly,Takereinforcementmeasures,whennecessary.
NOTE
About Fluorinated Gasses
-Thisair-conditioningunitcontainsuorinatedgasses.Forspecicinformationonthetypeofgasandtheamount,
please refer to the relevant label on the unit itself. Compliance with national gas regulations shall be observed.
-Installation,service,maintenanceandrepairofthisunitmustbeperformedbyacertiedtechnician.
-Productuninstallationandrecyclingmustbeperformedbyacertiedtechnician.
- If the system has a leak-detection system installed, it must be checked for leaks at least every 12 months. When
the unit is checked for leaks, proper record-keeping of all checks is strongly recommended.
3 BEFORE INSTALLATION
3.1 Handling of the unit
The angle of inclination should not be more than 15º when carrying the unit in case of overturn of the unit.
1) Rolling handling: several rolling rods of the same size are placed under the base of the unit, and the length of each rod
must be more than the outer frame of the base and suitable for balancing of the unit.

5
2) Lifting: each lifting rope (belt) should be able to bear 4 times the weight of the unit. Check the lifting hook and ensure that
itisrmlyattachedtotheunit.Toavoiddamagestotheunit,aprotectiveblockmadeofwood,clothorhardpapershouldbe
placed between the unit and rope when lifting, and its thickness should be 50mm or more. It is strictly forbidden to stand under
the machine when it is hoisted.
Lifted cable the angle of inclinaton
Lifted hook
Lifted hook
4 protective blocks should be placed.
Unilateral distance should be 50mm or
more.
Fig. 3-1 lifting of the unit
4 IMPORTANT INFORMATION ON REFRIGERANT
ThisproductcontainsuorinatedgreenhousegasescoveredbytheKyotoProtocol.Donotventgasesintotheatmosphere.
Refrigerant type: R32
GWP value: 675
GWP : global warming potential
The refrigerant quantity is indicated on the unit name plate
Add the refrigerant
Amount of factory-charged refrigerant and tonnes CO2 Equivalent is
Table 4-1
Model Refrigerant(kg) Tonnes CO2equivalent
KEM-30 DRS4.1 7.9 5.33
KEM-60 DRS4.1 14.0 9.45
KEM-90 DRS5 14.0 10.80
5 SELECTION OF INSTALLATION SITE
1)Unitscanbeinstalledonthegroundorproperplaceonaroof,providedthatsufcientventilationcanbeguaranteed.
2) Do not install the unit in a scenario with requirements on noise and vibration.
3) When installing the unit, take measures to avoid exposure to direct sunlight, and keep the unit away from boiler pipeline and
surroundings which might corrode the condenser coil and copper pipes.
4) If the unit is within the reach of unauthorized personnel, take protective measures for safety considerations, such as installing
a fence. These measures can prevent man-caused or accidental injuries, and can also prevent the electrical parts in operation
from being exposed when the main control box is opened.
5)Installtheunitonafoundationatleast200mmhighabovetheground,wheretheoordrainisprovided,toensurethatwater
does not accumulate.
6) If installing the unit on the ground, put the steel base of the unit on the concrete foundation, which must be as deep as into
the frozen soil layer. Ensure the installation foundation is separated from buildings, as the noises and vibration of the unit
may adversely affect the latter. By means of the installation holes on the unit base, the unit can be fastened on the foundation
reliably.
7) If the unit is installed on a roof, the roof must be strong enough to bear the weight of the unit and the weight of maintenance
personnel. The unit can be placed on the concrete and groove-shaped steel frame, similar to the case when the unit is installed
on the ground. The weight-bearing groove-shaped steel must match the installation holes of the shock absorber and is wide
enough to accommodate the shock absorber.
8) For other special requirements for installation, please consult the building contractor, architectural designer or other
professionals.
NOTE
The selected installation site of the unit should facilitate connection of water pipes and wires, and be free from water
inletofoilfume,steamorotherheatsources.Besides,thenoiseoftheunitandcoldandhotairshouldnotinuence
the surrounding environment.

6
6 PRECAUTIONS ON INSTALLATION
6.1 Outline dimensional drawing
6.1.1 KEM-30 DRS4.1
F
D
E
A
B
C
B
E
D
F
A
C
AD
C
F
E
B
Front view Left view Top view
Fig. 6-1 Outline dimensional of KEM-30 DRS4.1
6.1.2 KEM-60 DRS4.1
F
D
E
A
B
C
B
E
D
F
A
C
AD
C
F
E
B
Front view Left view Top view
Fig. 6-2 Outline dimensional of KEM-60 DRS4.1
F
D
E
A
B
C
B
E
D
F
A
C
AD
C
F
E
B
Front view Left view Top view
Fig. 6-3 Outline dimensional of KEM-90 DRS5
Table 6-1
Model KEM-30 DRS4.1 KEM-30 DRS4.1 KEM-60 DRS4.1
A 1870 2220 2220
B 1000 1325 1135
C 1175 1055 2315
D 204 234 910
E 200 210 255
F 470 470 270
NOTE
After installing the spring damper, the total height of the unit will increase by 135 mm or so.

7
6.2 Requirements of arrangement space of the unit
1) To ensure adequate airflow entering the condenser, the influence of descending airflow caused by the high-rise buildings
around upon the unit should be taken into account when installing the unit.
2)Iftheunitisinstalledwheretheowingspeedofairishigh,suchasontheexposedroof,themeasuresincludingsunkfence
andPersianblindscanbetaken,to preventtheturbulentow fromdisturbingtheair enteringtheunit.Iftheunitneedstobe
provided with sunk fence, the height of the latter should not be more than that of the former; if Persian blinds are required, the
total loss of static pressure should be less than the static pressure outside the fan. The space between the unit and sunk fence or
Persian blinds should also meet the requirement
3) If the unit needs to operate in winter, and the installation site may be covered by snow, the unit should be located higher than
thesnowsurface,toensurethatairowsthroughthecoilssmoothy.
A
B
D
C
G
A
E E
E E
E E
FF FF
B
D
C
Input of airow
Input of airow Input of airow
Input of airow
Input of airow
Input of airow
Main unit
Main unit
Main unit
Main unit Main unit
Main unit Main unit
Main unit
Main unit Main unit
Fig. 6-4 single unit installstion
Fig. 6-5 multiple units installstion
Main unit
Table 6-2
Installation space (mm)
KEM-30 DRS4.1
KEM-60 DRS4.1 KEM-90 DRS5 KEM-30 DRS4.1 KEM-60 DRS4.1 KEM-90 DRS5
A≥800 ≥1500 E≥800 ≥800
B≥2000 ≥1500 F≥1100 ≥1100
C≥2000 ≥1500 G≥3000 ≥3000
D≥800 ≥1500 / / /
WARNING
Whenthenumberofunitsinstalledinthesameplaceisgreaterthan40units,pleasecontactprofessionalstoconrm
the installation method.