Kaysun AMAZON III W User manual

INSTALLATION MANUAL
AMAZON III W
K2F-252 DN3W K2F-280 DN3W K2F-335 DN3W
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.

Installation manual
1
CONTENTS PAGE Install according to this installation instructions strictly.
If installation is defective, it will cause water leakage, electrical
shock fire.
PRECAUTIONS......................................................................... 1
CONSTRUCTION CHECKPOINTS .......................................... 2
ACCESSORIES ....................................................................... 3
MAIN UNIT INSTALLATION.................................................... 4
WATER SYSTEM INSTALLATION .......................................... 7
REFRIGERANT PIPE ……………….........................................12
ELECTRIC WIRING ………………............................................17
TRIAL RUN.............................................................................. 28
When installing the unit in a small room, take measures
against to keep refrigerant concentration from exceeding
allowable safety limits in the event of refrigerant leakage.
Contact the place of purchase for more information. Excessive
refrigerant in a closed ambient can lead to oxygen deficiency.
Use the attached accessories parts and specified parts for
installation.
Otherwise, it will cause the set to fall, water leakage, electrical
shock fire.
1. PRECAUTIONS
Install at a strong and firm location which is able to
withstand the set's weight.
If the strength is not enough or installation is not properly done,
the set will drop to cause injury.
Precautions before reading the Installation manual.
This Installation manual is for the main unit.
Refer to the indoor unit Installation manual for indoor parts
installation.
Please read the power source unit Installation manual to install
the power source unit.
Please refer to the refrigerant distributor Installation manual to
install the refrigerant distributor.
The safety precautions listed here are divided into two categories. In
either case, important safety information is listed which must be read
carefully.
The appliance shall be installed in accordance with
national wiring regulations
The appliance shall not be installed in the laundry.
Before obtaining access to terminals, all supply circuits
must be disconnected.
The appliance must be positioned so that the plug is
accessible.
The enclosure of the appliance shall be marked by word, or
by symbols, with the direction of the fluid flow.
For electrical work, follow the local national wiring
standard, regulation and this installation instructions. An
independent circuit and single outlet must be used.
If electrical circuit capacity is not enough or defect in electrical
work, it will cause electrical shock fire.
WARNING Use the specified cable and connect tightly and clamp the
cable so that no external force will be acted on the
Failure to observe a warning may result in serious injuries.
The appliance shall be installed in accordance with national
wiring regulations.
CAUTION
Failure to observe a caution may result in injury or damage
to the equipment.
After completing the installation, make sure that the unit operates
properly during the start-up operation. Please instruct the customer
on how to operate the unit and keep it trained. Also, inform customers
that they should store this Installation manual along with the owner's
terminal.
If connection or fixing is not perfect, it will cause heat-up or fire
at the connection.
Wiring routing must be properly arranged so that control
board cover is fixed properly.
If control board cover is not fixed perfectly, it will cause heat-up
at connection point of terminal, fire or electrical shock.
If the supply cord is damaged, it must be replaced by the
manufacture or its service agent or similarly qualified
person in order to avoid a hazard.
manual for future reference. An all-pole disconnection device which has at least 3mm
separation distance in all pole and a residual current
device (RCD)with the rating of above 10mA shall be
incorporated in the fixed wiring according to the national
WARNING
This air conditioner is a comfortable air conditioner, and it
must be installed at indoor, do not place it in the places
such as machine room, precise instruments,
food, plants, animals or vertu etc.
rule
When carrying out piping connection, take care not to let
air substances go into refrigeration cycle.
Otherwise, it will cause lower capacity, abnormal high pressure
in the refrigeration cycle, explosion and injury.
Be sure only trained and qualified service personnel to
install, repair or service the equipment.
Improper installation, repair, and maintenance may result in
electric shocks, short-circuit, leaks, fire or other damage to the
equipment.
Do not modify the length of the power supply cord or use
of extension cord, and do not share the single outlet with
other electrical appliances.
Otherwise, it will cause fire or electrical shock.

Installation manual
2
Carry out the specified installation work after taking into
account strong winds, typhoons or earthquakes.
Improper installation work may result in the equipment falling
and causing accidents.
The temperature of refrigerant circuit will be high, please
keep the interconnection cable away from the copper
tube.
The power cord type designation is H07RN-F.
Equipment complying with IEC 61000-3-12.
If the refrigerant leaks during installation, ventilate the
area immediately.
Toxic gas may be produced if the refrigerant comes into the
Young children should be supervised to ensure that they
do not play with the appliance.
Don't install the air conditioner in the following locations:
There is petrolatum existing.
There is salty air surrounding (near the coast). If this can't be
avoided, choose a anticorrosive model.
There is caustic gas (the sulfide, for example) existing in the air
(near a hot spring).
The Volt vibrates violently (in the factories).
In buses or cabinets.
place contacting with fire. In kitchen where it is full of oil gas.
There is strong electromagnetic wave existing.
After completing the installation work, check that the
refrigerant does not leak.
Toxic gas may be produced if the refrigerant leaks into the
room and comes into contact with a source of fire, such as a
fan heater, stove or cooker.
There are inflammable materials or gas.
There is acid or alkaline liquid evaporating.
Other special conditions.
CAUTION
The insulation of the metal parts of the building and the air
conditioner should comply with the regulation of National
Electric Standard.
The space is too narrow. Because there isn’t enough space
for installation and maintenance.
The cooling & heating indoor unit is applicable for the
cooling & heating and the cooling only main unit; the
heating capacity of the indoor unit will be effective only
when the indoor unit connect to the cooling & heating
main unit. 2. CONSTRUCTION
This A/C is a kind of amenity unit. Don’t install it at the
place where for storing machine, precise instrument, food, CHECKPOINTS
plant, animal, artwork or any other special used occasion. Acceptance and Unpacking
Ground the air conditioner. After the machine arrives, check whether it is damaged during
Do not connect the ground wire to gas or water pipes, lightning
rod or a telephone ground wire. Incomplete grounding may
result in electric shocks.
Be sure to install an earth leakage breaker.
Failure to install an earth leakage breaker may result in electric
the shipment. If the surface or inner side of the machine is
damaged, submit a written report to the shipping company.
Check whether the model, specification and quantity of the
equipment conform to the contract.
shocks. After removing the outer package, please keep the operation
instructions well and count the accessories.
Connect the main unit wires , then connect the indoor unit
wires. Water pipeline connection
You are not allowed to connect the air conditioner with the
power source until wiring and piping the air conditioner is done. The pressure endurance of the water system pipelines are
1.96 MPa.
While following the instructions in this Installation manual,
install drain piping in order to ensure proper drainage and
insulate piping in order to prevent condensation.
Improper drain piping may result in water leakage and property
damage.
Install the indoor and main units, power supply wiring and
connecting wires at least 1 meter away from televisions or
radios in order to prevent image interference or noise.
Depending on the radio waves, a distance of 1 meter may not
be sufficient enough to eliminate the noise.
The appliance is not intended for use by young children or
The outer connecting pipelines of the water system should
apply the stainless steel pipes, if not, that may cause corrosion.
The cooling water source of the water-ring system should prior
to prefer closed cooling tower. The installer and user should
make sure the cool and hot water quality which inlet to the
water system of the unit (details please refer to Part 4-7).
Refrigerant pipe
Check the model and name to avoid mistaken installation.
infirm persons without supervision. An additionally purchased refrigerant distributor (manifold
adapter and manifold pipe) must be used for installing the
Young children should be supervised to ensure that they
do not play with the appliance.
refrigerant pipes.

Installation manual
3
The refrigerant pipes must have the specified diameter.
Nitrogen of a certain pressure must be filled into the refrigerant
pipe before welding.
The refrigerant pipe must undergo heat insulation treatment.
After the refrigerant pipe is installed completely, the indoor unit
cannot be powered on before performing the airtight test and
creating a vacuum. The air-side and liquid-side pipes must
undergo the airtight test and vacuum extraction.
3. ACCESSORIES
Table.3-1
Name Qty. Outline Function
Main unit
installation manual
1
Airtight test
The refrigerant pipe must undergo the airtight test [with 3.9
MPa(40kgf/cm2) nitrogen].
Creating a vacuum
Be sure to use the vacuum pump to create a vacuum of the
connective pipe at the air side and liquid side concurrently.
Refrigerant replenishment
According the length & diameter of main & indoor unit
(actual), and the refrigerant correction to calculate the
refrigerant
replenishment quantity. (the specific calculation method refer to
Main unit
owner’s manual
1
Indoor unit
1
owner’s manual
User’s guideline
1
Bolts bag 1
Be sure to deliver
it to the customer
Be sure to deliver
it to the customer
Be sure to deliver
it to the customer
the table on the cover of electrical control box) Stone for service
Record the refrigerant replenishment quantity, actual length of
pipe and the height difference of the indoor & main unit onto
the operation confirmation table of the main unit in advance for
future reference.
Toggling flathead
1
screw
For toggling of
indoor and main
units
Electric wiring Water outlet
connector
1
For draining the
internal condensed
water of the unit
Select the power supply capacity and wire size according to
the design manual. The power cable of the air conditioner is
generally thicker than the power cable of the motor.
In order to prevent mis operation of the air conditioner, do not
interleave or entwine the power cable (380-415V 3N~50Hz/
60Hz) with the connection wires (low-voltage wires) of the
indoor/main unit.
Power on the indoor unit after performing the airtight test and
Water outlet plug
1
Seal ring 1
Seal plug
Block a drainage port
of the unit chassis
which do not need to
drainage
For avoiding water
leakage of the
chassis
making a vacuum. For pipe Cleaning
Through the ENC1 switch to set the address of main units.
Setting Range : 0~2 . 0 is master unit,the others are slave
unit.
Y-shape water
filter
1
Connect to the side
of water inlet pipe
Setting the quantity of indoor units on the master unit after
setting the address. The quantity of indoor units can be
settled from S10 and ENC4 ,setting range :0~63 . 0&1
means
one indoor unit The detail information please refer to wiring
nameplate.
Trial run
Indoor unit
branch pipes
1
installation manual
Main unit
1
branch pipes
installation manual
Perform the trial run only after the main unit has been powered
on for over 12 hours. Connective pipe
1
accessory Connect to the side
of liquid pipe
Air side
connective pipe 1 or 2
Connect to the side
of air pipe (8/10 HP
1pc, 12HP 2pcs)
8

Installation manual
4
4. MAIN UNIT INSTALLATION
4.1 Main unit combi nation
Table.4-1
4.4 Hoisting Main Unit
It is banned to take wooden cork base as the force bearing
point of lifting up the unit during hoisting, the correct method
is use the braces or lifting ropes which can bear the unit’s
weight, and go through the lifting holes of the front and back
bottom plates in the unit for hoisting.
It is banned to tear down any packages during hoisting
installation; it should use two longer than 4m ropes to lift up
the unit with the packages, and keep the unit in balance, lift it
up stably. Under transporting the unit with no packages or the
package has been damaged, it should use base plate or
packaging materials for protection.
Pay attention to keep the main unit vertical during
transportation, hoisting, and make sure the safety during
transportation and hoisting.
4.2 Dimension of main unit (unit:mm) 4.5 Base for main unit
A solid, correct base can:
Avoid the main unit from sinking.
Avoid the abnormal noise generated due to base.
Base types
Steel structure base
Concrete base (see the figure below for the general making
method)
Main unit
Φ10 Expansion bolt
Rubber shocking
proof mat Concrete basement
4.3 Selecting installation position
Fig.4-1 Solid ground
or roofing
h=200mm
200mm
Ensure that the main unit is installed in a place convenient to
connect water, refrigerant and electricity.
Ensure that the noise and exhaust ventilation of the main unit
do not affect the neighbors of the property owner or the
surrounding ventilation. CAUTION
Ensure that the main unit is installed in a well-ventilated place
that is possibly closest to the indoor unit. The key points to make basement:
Fig.4-2
Ensure that the main unit is installed in a cool place without
direct sunshine exposure or direct radiation of high-temp heat
source.
Do not install the main unit in a dirty or severely polluted place,
so as to avoid blockage of the heat exchanger in the main unit.
Do not install the main unit in a place with oil pollution, salt or
high content of harmful gases such as sulfurous gas.
The master unit’s basement must be made on the solid
concrete ground. Refer to the structure diagram to make
concrete basement in detail, or make after field measurements.
In order to ensure every point can contact equality, the
basement should be on completely level.
If the basement is placed on the roofing, the detritus layer isn’t
needed, but the concrete surface must be flat. The standard
concrete mixture ratio is cement 1/ sand 2/ carpolite 4, and add
Φ10 strengthen reinforcing steel bar, the surface of the cement
and sand plasm must be flat, border of the the basement must
be chamfer angle.






04 Mode
Qty.of indoor unit
04 Mode
Qty.of indoor unit

04:
 
 04:
 
  04:
 
  04: 04 


 04:    
 04:04 


 04:     04:


 
 0404



   04:04 
 
 
 04 04 
 
 
04: 04 
 


 0404 
  
04:
 

Installation manual
5
Before construct the unit base, please ensure the base is
directly supporting the rear and front folding edges of the
bottom panel vertically, for the reason of these edges are the
actual supported sites to the unit.
Centering position illustration of each connective pipe (Unit: mm)
R
In order to drain off the seeper around the equipment, a
discharge ditch must be setup around the basement.
Please check the affordability of the roofing to ensure the load
capacity. Electric control box
Position illustration of screw bolt (Unit: mm)
B
A
Compressor (after electric
Double-pipe heat exchanger control box )
12×20 long u-shape hole
Fig.4-4
Fig.4-3
Table.4-2 Unit: mm
HP
8,10, 12
SIZE
65
A 650
B 780
C 518
D 550
112 70 65 80
Fig.4-5
Gas side
8,10HP:Φ25.4;12HP:Φ31.8
Liquid side
112 70 65 (Units accessories)
8,10HP:Φ12.7;12HP:Φ15.9
Oil balancer
For parallel connect
the modular units
Gauge point
Detect the pressure/
Refrigerant replenishment
R amplification Fig.4-6
63

Installation manual
6
4.6 Main units’ placement sequence
& master and slave units’ settings Top maintenance space
A system, which provide with more than two main units, will be
set as the followings method: The main units in this system
should place sequentially from the large to the small capacity;
the largest capacity main unit must be mounted at the first
branching site; and set the largest capacity main unit address
as the master Unit, while the other setting as the Slave Unit.
Take 18HP (composed by 10HP, 8HP ) as an example:
≥1 00 ≥1 00
1)Place the 10HP at a side of the first branching site.
2)Place the unit from the large capacity to the small (See the
detail placement illustration).
3)Set 10HP as the master unit, while the 8HP as the aux. unit.
Indoor unit A Indoor unit B Indoor unit C
Side ventilated
and
maintenance
space
Side ventilated
and
maintenance
space
Fig.4-9
The1st branching tube
Installation space of several main units
Main unit
(18HP)
10HP 8HP
Back ventilated and
maintenance space Back ventilated and
maintenance space
Fig.4-7
≥100
≥100
4.7 Installation space for main
unit
Ensure enough space for maintenance. The modules in the
same system must be on the same height.
When installing the unit, leave a space for maintenance. Install
the power supply at the side of the main unit. For installation
procedure, see the power supply device Installation manual.
Side ventilated
and
maintenance
space
Front ventilated and
maintenance space
≥100
Side ventilated
and
maintenance
space
Front ventilated and
maintenance space
Fig.4-10
Installation space of single main unit CAUTION
When install several main units, please reserve the top
maintenance space as the single main unit installation.
Back ventilated and
maintenance space
≥1 00 ≥1 00
Side ventilated
and
maintenance
space
Side ventilated
and
maintenance
space
Front ventilated and
maintenance space
Fig.4-8

Installation manual
7
water pipes
5. WATER SYSTEM INSTALLATION
5.1 Basic requirements of connection of chilled
10)All low positions of the water system should be provided with
drainage valves, to drain water in the heat exchanger of water
side and the system completely; and all high positions should
be supplied with discharge valves, to facilitate expelling air from
the pipeline. The discharge valves and drainage valves should
not be under heat preservation, to facilitate maintenance.
11)All possible water pipes in the system to be chilled should be
under heat preservation.
12)When the unit will be not used for a long time, water inside the
unit should be drained and cut off the power. If the unit is not
CAUTION drained in winter, then the double-pipe heat exchanger and the
water pipes system of the unit might be freezing and cracking
under low temperature.
●After the unit is in place, chilled water pipes can be laid. 13)The rated water flow volume of different models are as follow:
●The relevant installation regulations should be abided with
when conducting connection of water pipes.Table.5-1
●All water pipes must conform to local rules and regulations of
pipeline engineering.
●The size of water pipe should be the same as or larger than the
connector size of the unit (DN32).
●The heat exchanger of the unit is double-pipe heat exchanger.
There are different operation and maintenance methods
between the double-pipe heat exchanger double-pipe heat
exchanger and the other heat exchangers.
1) All connected water pipes should be thoroughly flushed, and can
not be cleaned after connected to the double-pipe heat
exchanger of the unit, for in case any impurity been flushed into
the heat exchanger. After connection, all the water pipes should
WARNING
●The water pipes network including water filters and heat
exchangers should be periodically cleaned, otherwise, dreg or
dirt may seriously damages the heat exchangers and water
pipes.
be washed down, and no any impurity left. ●The installation persons or the users must ensure the quality
2) Water must enter the double-pipe heat exchanger through the
inlet; otherwise the performance of the unit will decline.
3) The inlet pipe of each double-pipe heat exchanger in the unit
must be provided with a water flow switch, to realize flow-break
protection for the unit. Both ends of the water flow switch must
be supplied with horizontal straight pipe sections whose
diameter is 5 times that of the inlet pipe. The water flow switch
must be installed in strict accordance with “Installation &
Regulation Guide for Water Flow Switch” (See Section 4-5).
The wires of the water flow switch should be led to the electric
cabinet through shielded cable (see Electric Wiring section for
details). After the pipelines are installed, the water flow switch
will be set properly according to the rated water flow of the unit.
4) The pump installed in the water system should be equipped with
starter and should be controlled by the unit. The unit only
supplies the on, off controlling signal of water pump, and do not
supply the power for the water pump.
5) The pipes and their ports must be independently supported but
should not be supported on the unit.
6) The pipes and their ports of the double-pipe heat exchanger
should be easy to disassemble for operation and cleaning, as
well as inspection of port pipes of the evaporator.
of chilled water, and de-icing salt mixtures and air should be
excluded from the water system, since they may oxidize and
corrode steel parts inside the heat exchanger.
7) The inlet of the double-pipe heat exchanger should be provided
with a water filter with more than 40 meshes per inch (in the
accessories). The filter should be installed near to the inlet port
as much as possible, and be under heat preservation. Periodi-
cally clean the water filter according to the blocking condition of
the filter.
8) The flexible connectors must be mounted between the
double-pipe heat exchangers and the on-site pipes, to reduce
transfer of vibration to the building.
9) To facilitate maintenance, the inlet and outlet pipes should be
provided with thermometer or manometer. The unit is not
equipped with pressure and temperature instruments, so they
need to be purchased by the user.
Model
04 
 04

04 
Rated water flow volume(m3
/h)
5.4
6.0
7.2

Installation manual
8
5.2 Positions of water inlet, outlet and drainage
port
Air discharging valve
Water outlet
Water inlet
Double-pipe heat
exchanger drainage
valve
Electric control box
Double-pipe heat exchanger
Fig.5-1
5.3 Installation of drainage port connecting
pipes
According to the field installation condition, it is selected the side
which is draining easily for installing the drainage port connecting
pipes. During installation, the seal ring should be put on the water
outlet connector, then install into the drainage hole in the chassis
from the bottom of the unit, and then rotate 90°, to make it firmly
assembled. And connect a drainage pipe (commercially
available) with the water outlet connector, for draining the
condensed water of the main unit out to the suitable place.
Main unit chassis
Main unit
chassis drainage port
Drainage port
(in both sides of the chassis)
Seal ring Water outlet connector
Main unit chassis
Seal ring
Fig.5-2 Water outlet
connector
Main unit chassis
Seal ring
Water outlet plug
Fig.5-3
WARNING
It is needed to block the water outlet in the side which do not
need to be connected with drainage pipes with water outlet
plug and seal ring (see Fig. 5-3), otherwise the condensed water
produced during the system operation will drain near the
installation place, to cause inconvenience.

Installation manual
9
5.4 Installation of the main unit water pipelines
System water return pipe
ī
ī
System main
water return pipe
System main
water inlet pipe
Unit water inlet
branch pipe
Unit water return
branch pipe
Y-shape
water filter
Air discharging valve
ī
ī
To the drainage tank
Symbols description:
Gate valve Thermometer
Symbols description: Pressure gauge Motorized valve
Gate valve Y-shape filter Water flow switch Drainage valve
Pressure gauge
Water flow switch
Thermometer
Motorized valve
Fig.5-6
As the above figure 5-6, when horizontal installing the
water system main water inlet pipe and main water return
ī
Flexible connection Drainage valve pipe, the water inlet branch pipe and water return branch
pipe which connected with the unit must be separate
connected from the vertically lower direction of main water
Fig. 5-4 Main unit side water pipelines connecting figure
(Recommended)
inlet pipe and main water return pipe; if connected from the
side direction and the top direction will affect the unit
performance.
Refrigerant liquid side
Refrigerant air side
Oil balance connecting pipe
(use for parallel connection)
Indoor and main
units communication wire
Air discharging valve
5.5 Installation & regulation guide for water flow
switch
5.5.1 Please carefully check flow switches before conducting
installation of the water flow switch. Packing should be
in good condition, and the appearance should be free of
damage and deformation. If any problem, please contact
the manufacturer.
Power wire 5.5.2 Flow switches can be installed in the horizontal pipeline
Water return pipe
(DN32 or larger )
Water inlet pipe
(DN32 or larger )
Gate valve
Y-shape water filter
Drainage valve
Double-pipe heat
exchanger drainage valve
Fig.5-5 Direction schematic diagram of water system pipes
or the vertical pipeline with upward flowing direction but
cannot be mounted in the pipeline with downward
flowing direction. The inlet water of gravity should be
taken into account when flow switches are installed in
the pipeline with upward flowing direction.
5.5.3 Water flow switch must be installed on a section of
straight-line pipeline, and its both ends must be
supplied with straight-line pipes whose length is at least
5 times diameter of the pipe. In the meanwhile, the fluid
flowing direction in the pipeline must be consistent with
the direction of arrow on the switch. The connection
terminal should be located where wiring connection can
be easily done. (Fig.5-7).
5.5.4 Pay attention to the following items when conducting
installation and wire connection:
1)Collision of the wrench with the soleplate of the flow
switch is prohibited, since such collision may cause
deformation and failure of the flow switch.
2)To avoid electric shock and damages to the devices,
the power supply should be cut off, when wires are
connected or adjustment is done.

Installation manual
10
3) When wiring connection is conducted, adjustment of other
screws except connection terminals of micro switches and
ground screws is prohibited. In the meanwhile, over great
force should not applied when wires of micro switches are
connected, otherwise micro switches may suffer displace-
ment, thus leading to failure of flow switches.
4)Special grounding screws should be used for earth
connection. Bolts should not be installed or removed at
will; otherwise flow switches may suffer deformation and
failure.
5)Flow switches have been set at minimal flow value prior to
ex-factory. They should not be adjusted below the
ex-factory setting value, or they may suffer failure. After
installing flow switches, please press the flow switch lever
several times to check them. When the lever is found not
to respond with “clatter”, rotate the screw in a clockwise
direction, until “clatter” occurs.
6)Be sure to determine the model of target slice according to
the rated flow of the unit, the diameter of the outlet pipe
and the adjustment range of the target slice of the flow
switch. Besides, the target slice should not contact with
other restrictors in the pipeline or on the inner wall of the
pipeline, or the flow switch cannot be reset normally.
5.5.5 Determine whether the flow switch and the system
connected with it are in good operation according to the
measured value by flow meter, namely, when the
measured value on flow meter is less than 50% of rated
water flow of the unit, the water flow controller should
be cut off and observed for 3 working periods, and it
should be covered with flow switch shell timely.
Water flow switch Gate valve
‘' ‘'
Fig.5-7
5.6 Operations and maintenance of double-pipe
heat exchanger
5.6. Operations of double-pipe heat exchanger
1)Please note that correctly install the water inlet and outlet
pipes. The thread of water inlet and outlet are inner thread
G1-1/4.
2) For the double-pipe heat exchanger is internal thread copper
pipe, and for avoiding the impurities enter into and affect the
performance then
cause corrosion of the double-pipe heat exchanger, it must
be installed the water filter (accessory) near the water inlet
pipes of the unit.
3)Please use water pipes which conform to local rules and
regulations of pipeline engineering. The size of water pipe
should not smaller than the connector size of the unit (DN32).
Periodically clean the water filter according to the water
4)quality situation and the blocking condition of the filter.
Otherwise, it might damage
6)According to the different water quality the situations of double-
pipe heat exchanger and water system pipelines are different.
For removing the scale, it is needed to periodically clean the
double-pipe heat exchanger and water system pipelines. It is
suggested that set isolating valves in the suitable places during
water system installation and it is convenient to connect the
cleaning system for cleaning.
5.6.2 Double-pipe heat exchanger cleaning
Gate valve of unit water return pipe Acid-resistance water pump
Flow direction
of liquor
Isolating valve Cleaning liquor
Double-pipe
heat exchanger
Gate valve of unit water inlet pipe
Fig.5-8 Cleaning system schematic diagram of double-pipe heat
exchanger
5.6.2.1 Preparation of cleaning liquor
1) The material of water side double-pipe is red copper, and
for general corrosion situation it is suggested that use the
pickle liquor with 5% oxalic acid, 1.2% buffer and 0.8%
surfactant, and the temperature should be controlled in
60°C, that will has prefect cleaning effect.
2) If use hydrochloric acid as the cleaning liquor, for avoiding
to the corrosion and shorten the working life of the heat
exchanger, it should limit the
concentration of the hydrochloric acid to be 3% 5%, and
add corrosion inhibitor with 0.2% 0.3% concentration.
When it is cleaning, pay attention to the PH value change,
when the PH=8, then stop cleaning immediately. Then
change to fresh water for cleaning.
5.6.2.2 Cleaning method:
1) Before connecting to the cleaning system, it must stop the
unit operation, close the circulating water pump of water
system, and close the gate valves in inlet and outlet water
return pipes.
2) Correctly connect the cleaning system as the above figure
5-8, make the cleaning liquor counter flush the double-pipe
heat exchanger (opposite the general flow direction).
3) Acid cleaning: After make sure it will not leak water, and
then open the water pump to make the double-pipe heat
exchanger fill with acid liquor, and close the water pump,
and then let the double-pipe heat exchanger static state for
2h. And open the water pump continuously dynamic loop
for 3 4h. During that every 0.5h, it is done both side
alternative cleaning. During the acid cleaning, it should
timely do sampling test for acid concentration, if the
continuous twice testing concentration difference is lower
than 0.2%, which means the acid cleaning finish reaction.
Put the waste liquor to the waste liquor tank.
the filter screen of the water filter because of the abnormal
pressure.
When the unit will be not used for a long time in winter, water
5) inside the double-pipe heat exchanger and the water pipes
should be drained
4) Neutralization: After acid cleaning, use NaOH, Na3PO4
and soften liquid mixed accord to some proportion, and use
dynamic loop to alkali cleaning for the heat exchanger, in
order to alkalis counteract acids. Drain the waste liquor to
the waste liquor tank.
out in case for being frozen. The water inside the double-pipe
heat exchanger can be drained out by its drainage valve, the
drainage valve position
as Fig.5-1 display. The user can take down the front plate
and open the drainage valve for water draining, and also can
without taking down the
front plate then use a straight screwdriver to go through the
small hole in the front plate and open the drainage for water
draining, the small hole position as Fig.5-5 display.
5) Water cleaning: After alkali cleaning, use clean soften
liquor repeatedly wash the heat exchanger for 0.5h,
thoroughly wash the heat exchanger. Then drain the waste
liquor to the waste liquor tank.
6) Passivating treatment : Expose the double-pipe heat
exchanger in the air for 3 4h, or blow for 2h with high
pressure air. Make the pipe surface form a oxidation
passivating layer.

Installation manual
11
7)After cleaning, close the isolating valve, and take down the
cleaning system devices and keeping properly for backup.
8)Please contact the waste liquor treating company to treat the
Table.5-2
collected waste liquor.ITEMS
9)Connect the unit water system as the state before cleaning,
thoroughly check the unit and assist devices whether work
normally. Make sure there is no abnormal situation then
re-operates the unit.
WARNING
●The cleaning liquor flow direction must be correctly connected.
●Because different water quality and different using situations of
the heat exchanger, the cleaning period and method will be big
different, the above method is only for reference.
●The double-pipe heat exchanger is internal thread red copper
pipe, so that it can not use nitric acid as cleaning agent!
●The cleaning liquor and neutralization will be irritated and
corrosive to human eyes and skin, so please do well protection
measurements during the cleaning.
●It is strongly suggested that the user calls for professional
cleaning company to do component analysis of the water
quality and scale, and make a effective cleaning solution and
Chromaticity
Turbidity NTU
Smell
Visible objects
PH Value
Total hardness
(Take CaCO3 for calculation)
Fe
AL
Mn
Cu
Zn
CONCENTRATION (mg/L)
≤15, and can not
display other colors
≤1
None
None
7.5
～9
≤200
<0.5
<0.2
<0.1
<0.2
≤0.1
method, then do the cleaning.
5.7 System water quality requirements and
Alkalinity concentration(HCO3-) 70
～300
management
5.7.1 The unit water system must select the closed cooling
tower.
5.7.2 Circulating Chilled Water Processing Design Standard,
Sulfate radicalSO42-)
HCO3-/SO42-
Conductivity
NH3
CL-
Chlorine
5.7.3
other index also should meet with the Table.5.2.
It should periodically to detect and handle the chilled
water quality in the water system. When handling the
water, please make sure with the water dealing person
to confirm that use any water scale inhibitor and
antiseptic agent etc. will not have corrosion to the
<70
>1
10 ～ 500 μs/cm(20°C)
<0.1
<100
<1
<0,05
<5
<100
≤20
stainless steel and copper products. 500
～1000
H2S
Free carbon dioxide CO2 ε
Nitrate radical NO3-)
Suspended matter
Soluble solid
Oxygen consumption (
Take
O2for calculation )
≤3
<1
Ammonium ion (NH4)
SiO2 ( Ion state) <50

Installation manual
12
1
I
Table.6-1
6. REFRIGERANT
PIPE
6.1 Length and drop height permitted of the
refrigerant piping
Permitted
Note: 1.Reduced length of the branching tube is the 0.5m of the
equivalent length of the pipe.
2. When the conditions following as table. 6-2 are all meeted,
the allowable length can extended to 90m.
Table.6-2
value Piping No. Permitted value Examples Piping
Total pipe length (Actual) 300m
L1+
L2+L3+L
4+L5+L6+L7+ The size of indoor unit main pipe
shoud be bigger than the indoor unit L2~L9 need to increase
φ9,52φ 12,7
φ12,7φ15,9
φ15,9φ19,1
φ19,1φ22,2
φ22,2φ25,4
φ25,4φ28,6
φ28,6φ34,9
φ34,9φ41,3
Maximum Actual length
(Note1)
120m
L8+L9×2+a+
b+c+d+e+f+g+
h+i+j
L1+L5+L8
aux. pipe. The indoor unit main pipe the pipe diameter .
needn't increase when it is equal to
main pipe .
piping (L1) Equivalent length
Piping (farthest from the first line
150m +L9+j The length of indoor unit aux. pipe is
2 no longer than 40m.
a,b......j ≤ 40m .
pipe branch) equivalent length(L2) 40m(90m,Note2) L5+L8+L9+j The distance difference between
3 [the main unit to the farthest in-
door unit] and [the main unit to
If the farest indoor unit is
N10, the nearest indoor u-
nit is N1, i.e.(L1+L5+L8+
Reference Fig.6-1 .
Indoor unit-
main unit Main unit up H=50m the nearest indoor unit] is ≤40m. L9+j˅-˄L1+L2+L3+a˅
≤40m.
drop height Main unit down
Indoor unit to indoor unit drop height
H=40m
h=30m
N1 N2
Main unit
(one or more main units) a b
C Indoor unit
L1A L3
L2BL4D c d
The first line
branch pipe
L 5
N3 N4
Max piping equivalent length L1≤150m
(From the first line branch pipe) Maximum piping equivalent length L2≤40m
e
L 6
F
N5 N6
f
N7
E G
L8L7
g
L 9
H h
i
j
N8 N9
N10
Fig.6-1
Drop height between indoor unit and main unit H≤50m

Installation manual
13
F
I
6.2 Select the refrigerant piping type
G1 L2
M L A
N1
(71)
a b
C
L3
B D
L4 c d
N3
(71)
N2
(71)
N4
(71)
N5
L 5 (71)
e f
N6
(71)
W3 W2 W1
E L7 G
L8 g
L 9
H
N7
(71)
(8) (8) (10) h N8
(140)
i j
N9
(56)
N10
(71)
Fig.6-3
Table.6-3
Main pipe
Pipe name Code (As per the Fig. 6-2)
L1
6.4 Size of joint pipes for main unit
Indoor unit main pipe
Indoor unit aux. pipe
Indoor unit branching pipe assembly
Main unit branching pipe assembly
Main unit connective pipe
L2~L9
a, b, c, d, e, f, g, h, i, j
A, B, C, D, E, F, G, H, I
L, M
g1, g2, g3, G1
Base on the following tables, select the diameters of the main unit
connective pipes. In case of the main accessory pipe large than
the main pipe, take the large one for the selection.
Example: parallel connect with the three main units 10+10+8 (the
total capacity is 28HP), all indoor units total capacity is 812,
provided that the equivalent length of all pipes are ≥90m, accord-
ing to the Table 6-6 the main pipe diameter areΦ34.9/Φ22.2; in
according to all indoor unit capacity 1360, we could find out the
master unit diameter isΦ34.9/Φ19.1 base on Table 6-3. Take the
large one for the selection, we final confirm the main pipe diameter
isΦ41.3/Φ22.2.
6.3 Size of joint pipes for indoor unit
Table.6-5 Size of joint pipes for 410A main unit
When the equivalent length of all liquid
Model pipes < 90m, the size of main pipe(mm)
Table.6-4 Size of joint pipes for 410A indoor unit Gas side Liquid side The 1st branching pipe
Capacity of
indoor unit 8HP Φ22.2 Φ9.5 KCMI 100B-300B
(A)
A 166
166≤
A 230
230≤
A 330
330≤
A 460
460≤
A 660
660≤
A 920












branchin10HP
12HP
16HP
18~22HP
24HP
26~32HP
Φ22.2 Φ9.5
Φ25.4 Φ12.7
Φ28.6 Φ12.7
Φ28.6 Φ15.9
Φ28.6 Φ15.9
Φ31.8 Φ19.1
KCMI 100B-300B
KCMI 200B-300B
KCMI 200B-300B
KCMI 200B-300B
KCMI 200B-300B
KCMI 200B-400B
920≤A<1350 34~36HP Φ38.1 Φ19.1 KCMI 200B-400B
e.x.1: Refer to Fig.6-2, the capacity of downstream units to L2 is
71×4=284, i.e. the gas pipe for L2 is Φ22.2, liquid pipe is Φ9.5.
Capacity of
indoor unit
(A)
Size of main pipe (mm)
Available
branching pipe
Gas side
Liquid
side
A166


KCMI 100B-200B
166≤A230


KCMI 100B-200B
230≤A330


KCMI 100B-300B
330≤A460


KCMI 200B-300B
460≤A660


KCMI 200B-300B
660≤A920


KCMI 200B-400B
920≤A<1350


KCMI 200B-400B

Installation manual
14
Table.6-6 Size of joint pipes for 410A main unit Table.6-9 Main unit multi-connective pipe assembly
Model
Main
unit Qty.
Main unit connective
pipe diameter
Parallel connect
with the branch-
ing pipes Main pipe
8HP
10HP
12HP
16HP
18~22HP







2 units
3 units
g1, g2
 
8, 10HP
 Φ25.4/Φ12.7;
12HP: Φ28.6/Φ15.9
g1, g2, g3:
8, 10HP: Φ25.4/Φ12.7;
12HP: Φ28.6/Φ15.9;
G1: Φ41.3/Φ19.1
L:
KCME12
L+M:
KCME13
Refer to
Table 6-5
for main
pipe
dimension
24HP 

 Note: The pipe assemblies in above table is special for this model,
must be purchased separately.
6.7 Example
6.5
Branch pipes for main unit
Table.6-7
1) Take (10+8+8) HP that composed by three modules as an
example to clarify the pipe selection.
2) Take Fig.6-4 as an example. Provided that the equivalent
length of all pipes in this system is larger than 90m.
Model
8HP, 10HP
Main unit pipe connective
opening dimension(mm)
Gas side Liquid side
Φ25.4 Φ12.7
Table.6-8
Indoor unit
capacity
A(×100W)
When branching
pipe’s length =10m
Unit: mm
When branching
pipe’s length10m
Gas side Liquid side Gas side Liquid side
12HP Φ28.6 Φ15.9 A≤45 Φ12.7 Φ6.4 Φ15.9 Φ9.5
A ≥56 Φ15.9 Φ9.5 Φ19.1 Φ12.7
6.6 Branch pipes for indoor unit
Base on Table 6-8 and Table 6-9 select the multi connecting pipes
of main unit. Before installation, please read the Main Unit
Branching Pipe Installation Manual carefully.
Table.6-8 Main unit multi-connective pipe assembly (Illustration)
Main
A The branching pipe at the inside of the unit.
There are a~j branching pipes at the inside of the unit, the
branching pipe diameter should be select as per Table 6-10.
B Main pipe at the inside the unit (Refer to Table 6-4)
unit Qty.
2 units
Illustration
Main pipe
1

g2 g1
G1 Main pipe
2 1
3 units g3 g2 g1
1) The main pipe L3 with N1, N2 downstream indoor units that
total capacity is 71×2=142, the pipe L3 diameter is Φ15.9/Φ9.5,
thus select KCMI 100B-200B for the branching pipe C.
2) The main pipe L4 with N3, N4 downstream indoor units that
total capacity is 71×2=142, the pipe L3 diameter is Φ15.9/Φ9.5,
thus select KCMI 100B-200B for the branching pipe D.
3) The main pipe L2 with N1~N4 downstream indoor units that
total capacity is 71×4=284, the pipe L2 diameter is Φ22.2/Φ9.5,
thus select KCMI 100B-300B for the branching pipe B.
4) The main pipe L7 with N6, N7 downstream indoor units that
total capacity is 56+71=127, the pipe L7 diameter is Φ15.9/Φ
9.5, thus select KCMI 100B-200B for the branching pipe G.
5) The main pipe L6 with N57N7 downstream indoor units that
total capacity is 56+71×2=282, the pipe L6 diameter is Φ19.1/Φ
9.5, thus select KCMI 100B-200B for the branching pipe F.
6) The main pipe L9 with N9, N10 downstream indoor units that
total capacity is 56×2=112, the pipe L9 diameter is Φ15.9/Φ9.5,
thus select KCMI 100B-200B for the branching pipe I.
Model
When the equivalent length of all liquid pipes
≥90m, the size of main pipe (mm)
Gas side
Liquid
side
The 1st branching
pipe
8HP


KCMI 100B-300B
10HP


KCMI 200B-300B
12HP


KCMI 200B-300B
16HP


KCMI 200B-300B
18~22HP


KCMI 200B-400B
24HP


KCMI 200B-400B
26~32HP


KCMI 200B-400B
34~36HP


KCMI 200B-400B

Installation manual
15
F
7) The main pipe L8 with N87N10 downstream indoor units that
total capacity is 112+56×2=224 the pipe L8 diameter isΦ19.1/Φ
9.5, thus select KCMI 100B-200B for the branching pipe H.
8) The main pipe L5 with N57N10 downstream indoor units that
total capacity is 112+56×3+71×2=366, the pipe L5 diameter is
Φ28.6/Φ12.7, thus select KCMI 200B-300B for the branching
pipe E.
9) The main pipe A with N17N10 downstream indoor units that
total capacity is 56×3+71×6+112+706, thus select KCMI
200B-400B for the branching pipe A.
C Main pipe (Refer to Table 6-4, Table 6-5, Table 6-6): Main pipe
6.9 Gas tight test
1) Upon set up the indoor unit pipeline, please connect the
Hi-pressure pipe with shut-off valve firstly.
2) Weld the pipe at the low-pressure side to the meter
connector.
3) Use the vacuum pump discharging air inside the liquid side
shut-off valve and meter connecter, until to the -0.1MPa.
4) Close the vacuum pump, charge 3.9MPa nitrogen gas from
the piston of shut-off valve and from the meter connector.
Pressure inside should be maintained at there no less than
24 hrs.
Installation
Gas pipe Indoor unit
D Parallel connect the main units
1) The main unit linked by Pipe g1 is 8HP, parallel connects with
main unit. the connective pipe diameter to be selected accord-
ing to its connector size isΦ25.4/Φ12.7,
The main unit linked by Pipe g2 is 8HP, parallel connects with
main unit. the connective pipe diameter to be selected accord-
ing to its connector size isΦ25.4/Φ12.7,
The main unit linked by Pipe g3 is 10HP, parallel connects with
main unit. the connective pipe diameter to be selected accord-
ing to its connector size isΦ25.4/Φ12.7.
plate of valve Liquid pipe
Nitrogen Nitrogen
Gas side of
shut-of
f valve
Liquid side of
shut-off valve
Fig.6-5
2) The upstream of G1 is the two-parallel connected main units,
refer to Table 6-9 select the three-parallel connected main unit,
the pipe diameter isΦ41.3/Φ19.1.
3) Parallel connect the three main units, refer to Table 6-7 should
select KCME13 for main unit connective pipes (L+M).
6.8 Remove dirt or water in the piping
Make sure there is no any dirt or water before connecting the
piping to the main units.
Wash the piping with high pressure nitrogen, never use
refrigerant of the main unit.
CAUTION
●Pressurized nitrogen3.9MPais used for airtightness
test.
●It is not allowed to use oxygen, combustible gas or toxic
gas to conduct the airtightness test.
●When welding, please use wet cloth insulating the low-
pressure valve for protection.
●For avoid the equipment be damaged, the pressure
maintained time should not last too long.
G1 L2
M L A
N1
(71)
a b
C
L3
B D
L4 c d
N3
(71)
N2
(71)
N4
(71)
g1 g2 g3 L1
L5
L6
N5
(71)
e f
N6
(71)
W3 W2 W1
E L7 G
L8 g
L9
H
I
N7
(56)
(8) (8) (10) h N8
(112)
i j
N9
(56)
N10
(56)
Fig.6-4
L1 in the Fig.6-2, which upstream main units’ total capacity is 10
+8+8+26HP, based on table 6-5, the gas/liquid pipe diameter
areΦ41.3/Φ22.2, total capacity of the downstream indoor unit is
56×3+71×6+112=706 based on table 6-4, thegas/liquid pipe
diameter areΦ34.9/Φ19.1, take the large one for your
selection, final confirm the main pipe diameter is: gas/liquid
pipeΦ41.3/Φ22.2.

Installation manual
16
6.10 Vacuum with vacuum
pump
1)Use the vacuum pump which vacuum level lower than
6.12 The Installation key points of
connective pipes between main
units
-0.1MPa and the air discharge capacity above 40L/min. 1) Connect the pipes between main units, the pipes should
place horizontally (Fig.6-7,Fig.6-8), it is not allow the concave
2)The main unit is not necessary to vacuum, don’t open the
main unit gas and liquid pipe shut-off valves.
3)Make sure the vacuum pump could result as -0.1MPa or
below after 2 hrs or above operation. If the pump operated 3
hrs or above could not achieve to -0.1MPa or below, please
check whether water mix or gas leak inside of the pipe.
at junction site and set longer than 200mm bending pipes for
saving oil.
2) All connective pipes between the main units are not allowed
to over than the height of every outlets of the pipes (Refer to
Fig.6-9, Fig.6-10).
At least 200mm
Connect to
the indoor unit
√Correct way Fig.6-7
Connect to
the indoor unit
CAUTION
Don’t mix up the different refrigerants or abuse the tools and
measurements which directly contact with refrigerants. √Correct way Fig.6-8
Don’t adopt refrigerant gas for air vacuuming.
If vacuum level could not get to -0.1MPa, please check whether
resulted by leakage and confirm the leakage site. If no leakage,
please operate the vacuum pump again 1 or 2 hrs. Connect to
the indoor unit
Has not bending pipes
6.11 Refrigerant amount to be added
Calculate the added refrigerant according to the diameter and
the length of the liquid side pipe of the Main/indoor unit
connection. The refrigerant is R410A.
× Wrong way Fig.6-9
Table.6-11
Pipe size on
liquid side
Φ6.4
Φ9.5
Φ12.7
Φ15.9
Φ19.1
Φ22.2
Φ25.4
Refrigerant to
be Added per meter
0.022kg
0.057kg
0.110kg
0.170kg
0.260kg
0.360kg
0.520kg
Connect to
the indoor unit
Down slope the
pipeline connection
Φ28.6 0.680kg × Wrong way Fig.6-10
Connect with vacuum pump
Perform the pump (last for 2 hrs or above)
When get the vacuum level
-0.1MPa, the pump should
keep running for 20-60 mins
Shut down the
vacuum pump
1. Close-off the valve of
vacuum meter.
2. Cut off the connection
between pressure meter
and vacuum pump.
3. Close the vacuum
pump.
Place the vacuum state unused (1 hrs or above)
Fig.6-6

Installation manual
17
3)The branching pipe must be installed horizontally, error angle
of it should not large than 10°. Otherwise, malfunction will be
caused
.
Table.7-1
U-shaped branching pipe
$
A direction view
Wrong Correct
1 0 e
Horizontal surface
1 0 e
Fig.6-11
7. ELECTRIC WIRING
7.1 Sw1 query instructions
Total capacity requirement
of
No. Display content (Normal
display) Note
1 Main unit address 0,1,2,3
2 Main unit capacity 8,10,12
3 Modu lar main unit qty. Available for
main unit
4 Total capacity of main unit Capacity
requirement
5
indoo r unit
Available for
main unit
6 Total corrected capacity
requi rement of main unit
Available for
main unit
7 Operation mode 0,2,3,4
8 The actual operation
capacity
of this main unit
Capacity
requirement
9 Water flow switch state 0-Open
1-Close
10 T2B/T2 average temp. Actual value
11 T5 inverter module temp. Actual value
12 T7 discharge temp. of
inverter
compressor
Actual value
13 TSJ water inlet temp. Actual value
14 TSC1 water outlet temp. of
upper pipe.
Actual value
15 TSC2 water outlet temp.of
lower pipe
Actual value
16 Current 1 of inverter
compressor
Actual value
17 Current 2 of inverter
compressor
Actual value
18 High pressure Display value×0.1MPa
19 Low pressure Display value×0.01MPa
20 Opening angle of EXV A Display value×8
21 Opening angle of EXV B Display value×8
22 Priority mode 0,1,2,3,4
23 Qty. of communicating
Indoor units
Actual value
24 Qty. of installed indoor
units
Actual value
25 The last time malfunction
or the protective code
Without protection or
error display code 00
26 - Check end

Installation manual
18
The display contents as followings:
1)Normal display: When in standby, it displays the qty. of indoor
units that can communicate with the main unit .When it is
operating , it will display the rotation frequency of the
compressor.
2ε Operation mode: 0—OFF/Fan, 2—Cooling, 3—Heating (Cooling
only type without), 4—Constraint cooling.
3ε Water flow switch state: 0—Open,1—Close.
4)Priority mode : 0—Heating Priority Mode, 1—Cooling Priority
Mode, 2—Priority Mode, 3—Only Respond The Heating Mode,
4—Only Respond The Cooling Mode.
5)EXV opening angle: pulse count=display value×8.
6)ENC1: Main unit address setting switch,
ENC2: Main unit capacity setting switch,
ECN3: Network address setting switch,
S10, ENC4: combination setting the qty. of the installed indoor
units.
SW1:Query button;SW2:Constraint cooling.
$ % & 1
XT1 Powerline terminal
380-415V 3N~ 50Hz/60HzFig.7-2
NOTE
Setting 0 or 1, all mean install 1 set indoor unit.
7.2 Terminal base function
XT2 water flow switch ON/OFF signal input terminal
(Must be connected to weak current control circuit !)
XT3 Water pump ON/OFF signal output terminals
(Dry contact )
Fig.7-3
Fig.7-4
Communication
switching plate Main units Digital Indoor units Indoor units Main units
XT1 powerline
terminal
central monitor kilowatthour central
meter monitor
communi-
cation bus
communi-
cation bus
Fig.7-5
Grounding
terminal
XT2 water flow switch
ON/OFF signal input
XT3 water pump
ON/OFF signal output
Fig.7-1 Electric control box diagram
WARNING
Never apply line voltage to communication switching plate and
XT2 water flow switch ON/OFF signal input !