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.

8
6.3 Installation foundation
6.3.1 Base structure
Outdoor unit base structure design should take account of the
following considerations:
1) A solid base prevents excess vibration and noise. Outdoor unit
bases should be constructed on solid ground or on structures of
sufcientstrengthtosupporttheunits’weight.
2) Bases should be at least 200mm high to provide sufficient
access for installation of piping.Snow protection should also be
considered for the base height.
3) Either steel or concrete bases may be suitable.
4) A typical concrete base design is shown in Fig. 6-5. A typical
concretespecicationis1partcement,2partssandand4parts
crushed stone with steel reinforcing bar. The edges of the base
should be chamfered.
5) To ensure that all contact points are equally secure, bases
should be completely level. Base design should ensure that the
pointsonthe units’basesdesignedforweight-bearingsupport
are fully supported.
1870
800
926
530
≥80mm
≥200mm
2200
1105
958
425
2200
1460
1017
370
Rubber anti-vibration pads
Solid ground / surface Outdoor unit
Concrete base
h≥200mm
Fig.6-6 Front view of base structure
6.3.2 Location drawing of installation foundation
of the unit: (unit: mm)
1) If the unit is located so high that it is inconvenient for
maintenance personnel to conduct maintenance, the suitable
scaffold can be provided around the unit.
2) The scaffold must be able to bear the weight of maintenance
personnel and maintenance facilities.
3) The bottom frame of the unit is not allowed to be embedded
into the concrete of installation foundation.
4) A drainage ditch should be provided to allow drainage of
condensate that may form on the heat exchangers when the
units are running in heating mode. The drainage should ensure
that condensate is directed away from roadways and footpaths,
especially in locations where the climate is such that condensate
may freeze.
(unit: mm)
1870
800
926
530
≥80mm
≥200mm
2200
1105
958
425
2200
1460
1017
370
Inlet and outlet
pipe side
Drainage channel
Electric control
box side
Anchor bolt
Fig. 6-7 Top view of schematic diagram of installation dimension
of KEM-30 DRS4.1
1870
800
926
530
≥80mm
≥200mm
2200
1105
958
425
2200
1460
1017
370
Inlet and outlet
pipe side
Inlet and outlet
pipe side
Electric control
box side
Electric control
box side
Drainage channel
Drainage channel
Fig. 6-8 Top view of schematic diagram of installation
dimension of KEM-60 DRS4.1
Anchor bolt
Anchor bolt
(unit: mm)
(unit: mm)
Fig. 6-9 Top view of schematic diagram of installation
dimension of KEM-90 DRS5
6.4 Installation of damping devices
6.4.1 Damping devices must be provided
between the unit and its foundation.
BymeansoftheΦ15mmdiameterinstallationholeson
the steel frame of the unit base, the unit can be fastened
on the foundation through the spring damper. See Fig.6-
6,6-7 (Schematic diagram of installation dimension of the
unit) for details about center distance of the installation
holes. The damper does not go with the unit, and the
user can select the damper according to the relevant
requirements. When the unit is installed on the high roof or
the area sensitive to vibration, please consult the relevant
persons before selecting the damper.
6.4.2 Installation steps of the damper
Step 1. Make sure that the flatness of the concrete
foundation is within ±3mm, and then place the unit on the
cushion block.
Step 2. Raise the unit to the height suitable for installation
of the damping device.
Step 3. Remove the clamp nuts of the damper. Place the
unitonthedamper,andalignthexingboltholesofthe
damperwiththexingholesontheunitbase.
Step4.Returntheclampnutsofthedampertothexing
holes on the unit base, and tighten them into the damper.
Step 5. Adjust the operational height of the damper base,
and screw down the leveling bolts. Tighten the bolts by
one circle to ensure equal height adjustment variance of
the damper.
Step 6. The lock bolts can be tightened after the correct
operational height is reached.

9
Anchor bolt
Nut
Ferrol
Damping device
Fig. 6-10 Installation of the damper
6.5 Installation of device to prevent
snow
build-up and strong breeze When installing an air-cooled heat
pump chiller in a place with heavy snow, it is necessary to take
snow protection measures to ensure trouble-free operation of
the equipment.
Otherwise, accumulated snow will block the air flow and may
cause equipment problems.
(a) Buried in the snow
(b) Snow accumulated
on the top plate
(c) Snow falling on the equipment
(d) Air inlet blocked by snow
(e) Equipment covered with snow
Monsoon
Monsoon
Fig. 6-11 Types of problems caused by snowv
6.5.1 Measures used to prevent problems
caused by snow
1) Measures to prevent build-up of snow
The base height should be as least the same as the predicted
snow depth in the local area.
Outdoor
unit
Base height
Fig. 6-12 Snow prevention base height
2) Lightning protection and snow protection measures
Check the installation site thoroughly; do not install the
equipment under awnings or trees or a place where snow is
piled up.
6.5.2 Precautions for designing a snow cover
1) To ensure a sufficient air flow required by the air-cooled
heat pump chiller, design a protective cover to make the dust
resistance 1 mm H2O or less lower than the allowable external
static pressure of air-cooled heat pump chiller.
2) The protective cover must be strong enough to withstand
the snow weight and the pressure caused by strong wind and
typhoon.
3) The protective cover must not cause short circuit of air
discharge and suction.

10
7 CONNECTION DRAWING OF PIPELINE SYSTEM
This is the water system of standard module.
Expansion tank
Water replenishing
Dirt discharge valve
unit
unit
unit
Auxiliary electric heater
Drain valve
Terminal
Two-way valve
Three-way valve
Y-typelter,
requiring≥40meshes
Symbol explanation
Stop valve Pressure gauge Flexible joint Gate valve Automatic discharge valve
Y-shapedlter Thermometer Circulating pump Check valve
Fig.7-1 Connection drawing of pipeline system
NOTE
The ratio of the two - way valves on the terminal shall not exceed 50 percent.
8 OVERVIEW OF THE UNIT
8.1 Main parts of the uint
Table 8-1
NO. NAME NO. NAME
1 Air outlet 6 Condenser
2 Top cover 7 Water intlet
3 Electric control box 8 Air inlet
4 Compressor 9 Water outlet
5 Evaporator 10 wire controller (It can be placed indoors)

11
1
2
8
7
9
4
6
10
5
3
1
2
4
3
5
10
8
7
9
6
1
2
3
4
5
6
7
8
9
(c) Snow falling on the equipment
Door 1 Door 2
Door 3 Door 4
Fig. 8-2 Main parts of KEM-60 DRS4.1
Fig. 8-3 Main parts of KEM-90 DRS5
Fig. 8-4 Doors of KEM-30 DRS4.1
8.2 Opening the uint
By means of a detachable service panel, the maintenance personnel can easily access the interior components of the unit.
Door 1 give access to the compartment of water pipes and water side heat exchanger.
Door 2/3/4 give access to the hydraulic compartment and electrical parts.

12
Door 1 Door 2
Door 1 give access to the compartment of water pipes , water side heat exchanger,acculator and liquid-vapor separator.
Door 2/3/4 give access to the hydraulic compartment and electrical parts
Door 1/2/3 give access to the compartment of water pipes and water side heat exchanger.
Door 4 give access to the electrical parts.
Door 5/6 give access to the hydraulic compartment.
Door 3 Door 4
Fig. 8-5 Doors of KEM-60 DRS4.1
Fig. 8-6 Doors of KEM-90 DRS5
Door 1 Door 2 Door 3 Door 6 Door 5 Door 4

13
20
1
22
2
3
4
5
76
8
9
10
11
13
14
1618
19
21
23
2425
26
27
28
29
30
31
32
34 35
36
33
37
38
39
42 43
12
17
40
15
41
8.3 Outdoor unit PCBs
8.3.1 MAIN PCB
1) Label descriptions are given in Table 8-2
Fig. 8-7 Main PCB of KEM-30 DRS4.1 and KEM-60 DRS4.1
Table 8-2
NO. Detail information
1 CN30：Input of three-phase four-wire power supply (fault code E1) Input of transformer, 220-240V AC current. (only
valid for the main unit) Three phases A, B and C of power supply should exist 120° among them. If the conditions are
not met, fault of phase sequence or phase lack may occur, and fault code will be displayed. When the power supply
returns to normal condition, fault is removed. Attention: phase lace and phase dislocation of power supply are detect-
ed only in the early period after the power supply is connected, and they are not detected while the unit is in opera-
tion.
2 CN12:Quick return oil solenoid valve
3 CN5:EVA-HEAT,Water side heat exchanger heaters connection
4 CN13:EVA-HEAT,Electric of water side heat exchanger heaters connection
5 CN42:CCH,Crankcase heater
6 CN43:CCH,Crankcase heater
7 CN6:ST1,Four-way valve
8CN4/CN11:W-HEAT,Electricheaterofwaterowswitch
9 CN86:SV2,Spray cooling valve
10 CN83:Pump
1） After receiving start-up instruction, the pump will be started up instantly, and will maintain start-up state always in
the process of operation.
2） In case of refrigerating or heating shutdown, the pump will be shut down 2 minutes after all modules stop operat-
ing.
3）In case of shutdown under the pump mode, the pump can be directly shut down.

14
NO. Detail information
11 CN83:COMP-STATE,connect with an ac light to indicate the state of the compressor
Attention: the control port value of the pump actually detected is ON/OFF but not 220-230V control power supply,
so special attention should be paid when installing the light.
12 CN2:HEAT1.Pipeline Auxiliary Heater
Attention: the control port value of the pump actually detected is ON/OFF but not 220-230V control power supply,
so special attention should be paid when installing the pipeline auxiliary heater.
13 CN85：The alarm signal output of the unit(ON/OFF signal)
Attention: the control port value of the pump actually detected is ON/OFF but not 220-230V control power supply,
so special attention should be paid when installing the alarm signal output.
14 CN20:TP-PRO,Discharge temperature switch protection (protection code P0,provent the compressor from over
temperature 115℃)
15 CN52:Fan realy driver port.(Only for KEM-60 DRS4.1)
16 CN70:EXVA,System electronic expansion valve1.
17 CN60:Outdoor units communication or HMI conmunication port
18 CN61:Outdoor units communication or HMI conmunication port
19 CN64:Fan inverter module communication ports
20 CN65: Compressor inverter module communication ports
21 CN300:Program burn in port(WizPro200RS programming device).
22 IC10:EEPROM chip
23 CN1:temperature sensors input port.
T4: outdoor ambient temperature sensor
T3A/T3B:pipe temperature sensor of the condenser
T5:wtater tank temperature sensor
T6A:Refrigerant inlet temperature of EVI plate heat exchanger
T6B:Refrigerant inlet temperature of EVI plate heat exchanger
24 CN16:System pressure sensor
25 CN31:Temperature sensors input port
Th:System suction temperature sensor
Taf2:Water side antifreeze temperature sensor
Two:Unit water outlet temperature sensor
Twi:Unit water inlet temperature sensor
Tw:Total water outlet temperature sensor when several units are connected in parallel
26 CN3:Module 1 temperature sensor
27 CN10:Module 2 temperature sensor
28 CN15:Detection of current of the compressor system input port
INV1: Detection of current of the compressor A
INV2: Detection of current of the compressor B
29 CN69:Temperature sensors input port
Tp1:DC inverter compressor 1 discharge temperature sensor
Tp2:DC inverter compressor 2 discharge temperature sensor
Tz/7:coilnaloutlettemperaturesensor
Taf1:Water side antifreeze temperature
30 CN19:Low voltage protection switch.(Protection code P1)
31 CN91:Three-phase protector output switch.(Protection code E8)
32 CN58:Fan realy driver port.
33 SW3:Up button
a) Select different menus when enter menu selection.
b) For sopt inspection in conditions.
SW4:Down button
a) Select different menus when enter menu selection.
b) For sopt inspection in conditions.
SW5:Menu button
Press to enter menu selection, short press to return to the previous menu.
SW6:OK button
Enterthesubmenuorconrmthefunctionselectedbyshortpressing.
34 CN8:Remote function of cool/heat signal
35 CN8:Remote function of on/off signal

15
NO. Detail information
36 CN8:Waterowswitchsignal
37 Digital tube
1) In case of stand-by, the address of the module is displayed;
2) In case of normal operation, 10. is displayed (10 is followed by dot).
3) In case of fault or protection, fault code or protection code is displayed.
38 S5:Dip switch
S5-3: Normal control, valid for S5-3 OFF(factory default).
Remote control, valid for S5-3 ON.
39 S12:Dip switch
S12-1:Valid for S12-1 ON (factory default).
S12-2:Single water pump controll, valid for S12-2 OFF (factory default)
Multiple water pumps controll, valid for S12-2 ON.
S12-3:Normal cooling mode,valid for S12-3 OFF (factory default).
Low temperature cooling,valid for S12-3 ON.
40 CN7:TEMP-SW,Target water temperature switching port.
41 ENC2:POWER
DIP switch for capacity selection. (KEM-30 DRS4.1 defaults 0, KEM-60 DRS4.1 defaults 1)
42 CN74:The power supply port of the HMI .(DC9V)
43 ENC4:NET_ADDRESS
DIP switch 0-F of outdoor unit network address is enabled, which represent address 0-15.
CAUTION
Faults
When the main unit suffers faults, the main unit stops operating, and all other units also stop running;
When the subordinate unit suffers faults, only the unit stops operating, and other units are not affected.
Protection
When the main unit is under protection, only the unit stops operating, and other units keep running;
When the subordinate unit is under protection, only the unit stops operating, and other units are not affected.

16
8.3.2 MAIN PCB
1) Label descriptions are given in Table 8-3
26
1
28
23
45
6
7
89
10 11
12
13
15
16
18
19
20
21
2224
25
27
29
303132
33
34
35
36
37
38
41
40
42
43
44
45 46 47
17
23
14
39
Fig. 8-8 Main PCB of KEM-90 DRS5
Table 8-3
NO. Detail information
1 CN30: Input of three-phase four-wire power supply (fault code E1) Input of transformer, 220-240V AC current. (only
valid for the main unit) Three phases A, B and C of power supply should exist 120° among them. If the conditions
are not met, fault of phase sequence or phase lack may occur, and fault code will be displayed. When the power
supply returns to normal condition, fault is removed. Attention: phase lace and phase dislocation of power supply are
detected only in the early period after the power supply is connected, and they are not detected while the unit is in
operation.
2 CN12: Quick return oil solenoid valve
3 CN80: Injection solenoid valve of compressor system B
4 CN47: Injection solenoid valve of compressor system A
5 CN5: Water side heat exchanger heaters connection
6 CN40: Multi-function solenoid valve
7 CN13: Electric of water side heat exchanger heaters connection
8 CN41: Liquid bypass solenoid valve
9 CN42: Crankcase heater
10 CN6: Four-way valve
11 CN43: Crankcase heater
12 CN4/CN11:Electricheaterofwaterowswitch
13 CN27: Three-way valve (hot-water valve)
14 CN86: SV2, Spray cooling valve
15 CN25: Pump
1) After receiving start-up instruction, the pump will be started up instantly, and will maintain start-up state always in
the process of operation.
2) In case of refrigerating or heating shutdown, the pump will be shut down 2 minutes after all modules stop
operating.
3) In case of shutdown under the pump mode, the pump can be directly shut down.

17
NO. Detail information
16 CN33: COMP-STATE,connect with an ac light to indicate the state of the compressor
Attention: the control port value of the pump actually detected is ON/OFF but not 220-230V control power supply, so
special attention should be paid when installing the light.
17 CN2: HEAT1. Pipeline Auxiliary Heater
Attention: the control port value of the pump actually detected is ON/OFF but not 220-230V control power supply, so
special attention should be paid when installing the pipeline auxiliary heater.
18 CN24: The alarm signal output of the unit(ON/OFF signal)
Attention: the control port value of the pump actually detected is ON/OFF but not 220-230V control power supply, so
special attention should be paid when installing the alarm signal output.
19 CN20: TP-PRO, Discharge temperature switch protection (protection code P0, provent the compressor from over
temperature 115ºC)
20 CN71: EXVB, System electronic expansion valve2. Used for cooling.
21 CN72: WXVC, EVI electronic expansion valve. Used for EVI.
22 CN70: EXVA, System electronic expansion valve1.
23 CN60: Outdoor units communication or HMI conmunication port
24 CN61: Outdoor units communication or HMI conmunication port
25 CN64: Fan inverter module communication ports
26 CN65: Compressor inverter module communication ports
27 CN300: Program burn in port (WizPro200RS programming device).
28 IC10: EEPROM chip
29 CN1: temperature sensors input port.
T4: outdoor ambient temperature sensor
T3A/T3B: pipe temperature sensor of the condenser
T5: wtater tank temperature sensor
T6A: Refrigerant inlet temperature of EVI plate heat exchanger
T6B: Refrigerant inlet temperature of EVI plate heat exchanger
30 CN16: System pressure sensor
31 CN31: Temperature sensors input port
Th: System suction temperature sensor
Taf2: Water side antifreeze temperature sensor
Two: Unit water outlet temperature sensor
Twi: Unit water inlet temperature sensor
Tw: Total water outlet temperature sensor when several units are connected in parallel
32 CN69: Temperature sensors input port
Tp1: DC inverter compressor 1 discharge temperature sensor
Tp2: DC inverter compressor 2 discharge temperature sensor
Tz/7:coilnaloutlettemperaturesensor
Taf1: Water side antifreeze temperature
33 CN19: Low voltage protection switch. (Protection code P1)
34 CN91: Three-phase protector output switch. (Protection code E8)
35 CN58: Fan realy driver port.
36 CN8: Remote function of cool/heat signal
37 CN8: Remote function of on/off signal
38 CN8:Waterowswitchsignal
39 SW3: Up button
a) Select different menus when enter menu selection.
b) For sopt inspection in conditions.
SW4: Down button
a) Select different menus when enter menu selection.
b) For sopt inspection in conditions.
SW5: Menu button
Press to enter menu selection, short press to return to the previous menu.
SW6: OK button
Enterthesubmenuorconrmthefunctionselectedbyshortpressing.
40 CN18: Program burn in port (USB).