APPENDIX : 4.

Instruction Manual

1-12 Water Chiller

SHILLA E&T

Saving Our Seas for Future Generations www.nkcf.com NK CO., LTD.

SHILLA E&T Water Chiller For Ozone Generator. (NK-300)

Water Chiller For Ozone Generator

MODEL : NK – 300

SHILLA E&T CO.,LTD.

#1573-9,
9, Songjeong
Songjeong-dong, Gangseo-gu, Busan, Korea
[ Noksan
san National Industrial Complex 642B
642B-10L]
Tel : + 82 - 51 - 831 - 7705 Fax : + 82 - 51 - 831 - 7707
E-mail : slb2400@chol.com Web site : www.shillaref.com
SHILLA E&T Water Chiller For Ozone Generator. (NK-300)

CONTENTS

1. General Specification

2. Operation of water chiller.

2-1. Preparation before operation

2-2. Operation procedure for water chiller

2-3. Caution during operation

2-4. Stop procedure

2-5. Checklist of water chiller after operation

2-6. How to charge refrigerants

3. Component of water chiller

4. Trouble shooting
4-1. Troubleshooting Checklist for water cooling unit
4-2. Cleaning of condenser
4-3. Maintenance of condenser

5. Drawings

6. Manuals of parts
SHILLA E&T Water Chiller For Ozone Generator. (NK-300)

SAFETY INSTRUCTION

Before operating machine, please read the INSTRUCTION MANUAL.

Plesase follow the warning label, instruction, and caution procedure in
order to use it correctly. It is also highly recommended to keep the
INSTRUCTION MANUAL placed at easy access.

Transportation, installation, piping, wiring, operation inspection, and maintenance must be done
only by THE LICENSED and AUTHORIZED PERSON who has enough knowledge about safety rules,
and regulations

If the activity in your workplace is unauthorized by our company, we are not responsible for any
damages, losses, injuries, and death.

Useless parts and waste oil should be disposed ofas general industrial waste.
SHILLA E&T Water Chiller For Ozone Generator. (NK-300)

1. General Specification
SHILLA E&T Water Chiller For Ozone Generator. (NK-300)

GENERAL SPECIFICATION
DIVISION UNIT SPEC.

LENGTH mm 2310

SIZE WIIDTH mm 1577

HIGHT mm 2016

NEED kcal/hr 134,840

CAPA.
138,202
COMP kcal/hr
( Tc : 48℃ / Te : 7.5℃ )

FLOW RATE ㎥/hr 27

0.944
VOLUME OF WATER TANK ㎥
(1100L x 650W x 1320H)

REFRIGERANTS - R-407C

PAINTING COLOR - 7.5BG 7/2

CHILLED WATER
℃ 20
INLET
CHILLED WATER
℃ 15
DESIGN OUTLET
TEMP. COOLING WATER
℃ 40
INLET
COOLING WATER
℃ 45
OUTLET

MAIN CIRCUIT V 440

ELECTRIC
SOURCES
CONTROL CIRCUIT V 220
SHILLA E&T Water Chiller For Ozone Generator. (NK-300)

2. Operation of water chiller

SHILLA E&T Water Chiller For Ozone Generator. (NK-300)

2-1. Preparation before operation

ORDER CONTENT
Check level of water in water tank.
1
If the level is low, supplement water.
Check setting pressure of H.P., L.P., check setting refrigerant temperature at
2 Comp. Suction and water temperature at cooling water outlet. a) High-Low
Pressure switch
Check that all auxiliary appliances are installed properly according to diagram
3 for water cooling unit : valves, sensors, heat exchanger, accumulator, oil
separator, and expansion v/v
4 Check pressure of cooling water for condenser in cooling water system.
Check L.O.1
a. Confirm that L.O is recommended by maker and is not mixed with other L.O.
5 b. L.O. is low level before the operation. However, L.O. returns from oil
separator and the level rises after compressor runs.
c. Check level in the crankcase (over 3/4 on the sight glass)
6 Check refrigerant level on the sight glass of condenser.
7 Check insulation resistance of compressor.
L.O. should be heated warm before starting the compressor.
Before compressor When compressor begins After compressor stops.
is operated to work. Vapor comes out.

<Condition for L.O of Compressor>

1
L.O. : lubricant oil
SHILLA E&T Water Chiller For Ozone Generator. (NK-300)

2-2. Operation procedure for water chiller

ORDER CONTENT
1 Preheat L.O of the compressor (about 2 hours before operating compressor)
2 Supply water to water cooling unit.
3 Operate water pump.
4 Open suction and discharge v/v from central cooling water pump to condenser
5 Open 2~3 turns for suction v/v and discharge v/v of compressor.
Operate compressor. Slowly open suction and discharge v/v of compressor
6 checking H.P.,L.P., Be careful not to exceed H.P. trip. L.P and H.P. increase in the
beginning and becomes normal pressure.
Pressure during normal operation is like the followings.

<Pressure gauge>

H.P: 12~24kg/㎠g / L.P : 3~7kg/㎠g / O.P : 5~10kg/㎠g /

SHILLA E&T Water Chiller For Ozone Generator. (NK-300)

2-3. Caution during operation

ORDER CONTENT
1 Check cooling water flow. If the float switches are not on, water cooling unit
does not operate.
2 If liquid hammer occurs in the beginning, close suction v/v.
3 Check H.P2., L.P3., and W.P4.
4 If the refrigerant liquid, which does not evaporate, comes to compressor, oil
forming occurs in the crankcase and L.O does not become sufficient.
5 Check oil return from oil separator. If return pipe is cold, pipe line may be
clogged or float v/v may be leaky.
6 Check the amount of cooling water according to H.P In case of R-407C, H.P is
12~20 bar. If H.P. is high, supply more cooling water to condenser and release
non-condensable gas.
7 If compressor load is abnormally high, check motor coil and wiring.
8 Check compressor for 15 min. until compressor becomes stable.

2-4. Stop procedure

ORDER CONTENT
As L.P. and H.P. decreases during compressor operation, refrigerant is
1
accumulated in the condenser until L.P. is tripped.
2 If compressor stops for a long time, L.P. trip can be prevented.
3 Close suction & discharge v/v of compressor.
Close suction and discharge v/v of cooling water to condenser in water cooling
4
system.
5 Turn off the water pump.
Control panel should be on because oil should be warmed by heating element
5
before compressor is operated.

2
H.P. : High Pressure
3
L.P. : Low Pressure
4
W.P. : Water Pressure
SHILLA E&T Water Chiller For Ozone Generator. (NK-300)

2-5. Checklist of water chiller after operation

ORDER CONTENT
1 Clean dry filter at the outlet of condenser.
2 Check safety device and its setting point.

2-6. How to charge refrigerant

ORDER CONTENT
1 Connect the charging hose to the nipple on the condenser
2 Close discharge v/v of condenser to make refrigerant liquefied and accumulate
it in the condenser.
3 Refrigerant liquid is accumulated in the condenser by compressor
4 Charge refrigerant by opening charging v/v of refrigerant bottle.
5 Refrigerant liquid is charged by 2/3 on the sight glass
6 Take charging hose away and close charging v/v
7 Slowly open discharge v/v checking H.P

The flow of refrigerant liquid can be recognized by sight glass between dryer filter and
Sol. v/v. Refer to the following pictures.

Before compressor After compressor Sufficient flow when

operates begins operate compressor operates

Flow of Refrigerant
SHILLA E&T Water Chiller For Ozone Generator. (NK-300)

3. Component of Water Chiller

SHILLA E&T Water Chiller For Ozone Generator. (NK-300)

1) Compressor Maker : BITZER Model : 6F-50.2Y

It compresses refrigerant gas to the pressure
at which it can be condensed. It takes
refrigerant like pump.
The type is the reciprocating compressor,
which is useful for supplying little amount of
gas at relatively high pressures. The gas
comes to an inlet valve on the suction stroke
of the piston and is compressed.
Then, it is driven through another valve on
the return stroke. Operation condition is
checked by H.P., L.P., and O.P.

2) Oil separator Maker : HENRY Model : S 5690

L.O. is mixed with refrigerant in the

compressor. L.O. prohibits efficient heat
exchange on the surface ofcondenser and
evaporator. Compressor can maintain constant
oil level and reduce oil sludge.

Therefore, evaporation rate increases. L.O.

separated by the screen and baffle ofoil
separator returns to compressor while the
float needle v/v is open.
SHILLA E&T Water Chiller For Ozone Generator. (NK-300)

3) Condenser Maker : SHILLA E&T Model : CL4-4020

It absorbs heat from refrigerant gas to

become liquid. When gas reaches saturation
temperature, refrigerant gas over 40°C
becomes liquid as low temperature and high
pressure. It takes heat away not only from
evaporator, but also from compressor.

Non-condensable gas reduces the capacity. Even air of 1 % reduces the 25% of capacity.
Cooling water is F.W in L.T. cooling system. Non-condensable gas can be removed by purging.
Cooling water for condenser is F.W or S.W. Sea water is corrosive and may damage tube.
Cooling fresh water is from L.T. cooling system. Cooling sea water is from main cooling S.W
pump.

4) Evaporator Maker : DANFOSS Model :B3-095-122

Refrigerant liquid absorbs heat and become

gas. Some vapor is superheated before the
gas reaches compressor. The evaporator is the
kind of dry expansion cooling unit, which has
the refrigerant in the plates.
This type is more compact than shell & tube
type.
SHILLA E&T Water Chiller For Ozone Generator. (NK-300)

5) Accumulator Maker : Donghwa-Win Model : 2-1/8”

Refrigerant gas from evaporator may have

liquid, which causes compressor to be
damaged.
Gas in the accumulator is forced to
evaporate by absorbing heat from the hot
gas.

6) Dual pressure switch Maker : DANFOSS Model : KP - 15R

Pressure switch is used to protect compressor against too low suction pressure or too high discharge
pressure in the water cooling unit. It is used to start or stop compressor. It is fitted with a single pole
double throw (SPDP) changeover switch. The pressure is set by control knob.
It can control High Pressure and Low Pressure at the same time. Low pressure trip occurs when refrigerant
is not enough. High Pressure trip prevents compressor from being damaged against high pressure. Low
Pressure trip is minimum limit to prevent refrigerant liquid from decreasing excessively.
It is ultra-short bounce times, Manual control, vibration-proof, shock resistance, compact design, and laser
welded bellows.
The differential of low pressure is the charging pressure to start compressor again. It can be adjusted by
the setting knob. Differential of Low Pressure is about O.7kg/cm2G in water cooling unit. Low pressure
trip can be calculated as following

(Pressure when compressor stops) = Cut in -Differential.

(Pressure when compressor starts) = Cut in + Differential.

There is no differential for high pressure because it can be reset manually by the switch.

(The value of pressure gauge) = Cut in -differential

SHILLA E&T Water Chiller For Ozone Generator. (NK-300)

7) Water pressure switch Maker : DANFOSS Model : KP - 2

It is safety device to maintain the proper W.P
If the W.P falls under the setting point, water pressure switch stops the compressor.
Water pressure should be checked during compressor operation.

8) Shut off v/v Maker : DANFOSS Model : 1-3/8”

The flow of refrigerant liquid can be stopped

by turning of handle.

It’s necessary to change parts of unit and

repare.

9) Shut off v/v (service) Maker : Jungin-Jungmil Model : 1-1/8”

The flow of refrigerant liquid can be stopped

by turning of handle.

It’s necessary to change parts of unit and

repare.
SHILLA E&T Water Chiller For Ozone Generator. (NK-300)

10) Filter dryer Maker : DANFOSS Model : 1-1/8” SPCD-1180

It is installed between condenser and

expansion v/v. It removes impurities and
moisture.
It prevents nozzle from freezing. The solid
core in the inner side can be exchanged.
.

11) Sight Glass Maker : DANFOSS Model : SGN-22S 1-1/8”

The flow of refrigerant liquid can be

recognized by sight glass between dryer filter
and Sol. v/v.

12) Solenoid V/V Maker : DANFOSS Model : EVR-20 1-1/8”

It is called electromagnetic v/v. It is controlled

by electric signal from control panel.
Valve is opened by lifting the plunger. Sol. v/v
in the cooling unit adjusts the amount of the
refrigerant
flow according to temperature at compressor
suction and water outlet.
SHILLA E&T Water Chiller For Ozone Generator. (NK-300)

13) Shut off v/v Maker : DANFOSS Model : 1-3/8”, 1-1/8”, 7/8”

The flow of refrigerant liquid can be stopped

by turning of handle.

It’s necessary to change parts of unit and

repare.

14) Thermal expansion v/v Maker : DANFOSS Model : TEX-55

It helps liquid to evaporate under the low

temperature and low pressure by the rapid
expansion.
It adjusts the amount of refrigerant liquid
according to temperature of a sensor. If it is
open a lot, the pressure decreases.

15) Shut off v/v (ANGLE) Maker : CASTEL Model : 1/4”, 3/8”

The flow of refrigerant liquid can be stopped

by turning of handle.

It’s necessary to change parts of unit and

repare.
SHILLA E&T Water Chiller For Ozone Generator. (NK-300)

16) Safety v/v Maker : CASTEL Model : 3/8 – 1/2 ” 28B

It can be set-up max pressure.

If loaded pressure over the max pressure,

release ref. gas.

17) Purge v/v Maker : CASTEL Model : 1/4”

It releases ref. gas by manual.

18) Shut off v/v Maker : CASTEL Model : 1/2”

It is called oil return v/v.

If too much oil discharge to oil separator from

compressor, oil will flow to compressor by
opening of this v/v.

19) High press. gauge Maker : WIKAI Model : -0.1 ~ 3.5 MPa

It appears high pressure of compressor.

SHILLA E&T Water Chiller For Ozone Generator. (NK-300)

20) Low press. gauge Maker : WIKAI Model : -0.1 ~ 1.5 MPa

It appears low pressure of compressor.

21) Water press. gauge Maker : WIKAI Model : 0 ~ 0.6 MPa

It appears pressure of water that flowing

condenser.

22) Stop v/v Maker : DAESUNG Model : 1/4”

The flow of refrigerant liquid can be stopped

by turning of handle.

It’s necessary to change parts of unit and

repare.
SHILLA E&T Water Chiller For Ozone Generator. (NK-300)

23) Stop V/V Maker : TGK Model : STS 50A 2.5Mpa

It is a valve for stopping flow of water.

By the handle, valve is closed or opened.

24) Water pump Maker : KSB Model : MOVITEC VF18 - 2

It circulates water from water tank to

generator by force.

If pump is not operating and water flow

switch detects no signals, water cooling unit
will not operate.

25) Water level sensor Maker : Two line - level Model : 2L-5P2W

It sense level of water by electrode.

If level is too low, send signals to alarm.

SHILLA E&T Water Chiller For Ozone Generator. (NK-300)

26) Water tank Maker : SHILLA E&T Model : SLST -01

It receives high temp. water (about 20℃)

from generator, and release water to water
pump.

It has a sensor for checking level of water.

If level is too low, sensor send a signal and

operate the alarm.

Water filled by cover placed at upper side.

27) Thermometer Maker : CAS Model : 0 ~ 100℃

It appears temperature of water in

condenser.

28) Flow Switch Maker : IHC Model : HFS-20

It detects flow of water, and send signals to

control panel.

If no signal detected, compressor will not

operate.
SHILLA E&T Water Chiller For Ozone Generator. (NK-300)

29) Strainer Maker : Shin-hung valve Model : 304 50A

It purifies water from water tank.

Sediments gather bottom of strainer.

It is able to remove sediments through the

cap.
SHILLA E&T Water Chiller For Ozone Generator. (NK-300)

4. Troubleshooting
SHILLA E&T Water Chiller For Ozone Generator. (NK-300)

4-1. Troubleshooting Checklist for water cooling unit

PROBLEM POSSIBLE CAUSE MEASUREMENT

There is air or non-condensible gas Purge air from condenser.
in system.
Temperature of cooling water is 1. Increase the quantity of cooling
high. water.
2. Lower the temperature of cooling
H.P. is high water.
The amount of water is not enough. Increase quantity of water.
Tube of condenser is clogged or Clean the tube of condenser.
scaled.
There is excessive refrigerant in Release refrigerant.
condenser.
The amount of cooling water is Reduce the quantity of water.
excessive.
Temperature of cooling water is 1. Reduce quantity of water.
low. 2. Increase the Temp. of cooling
H.P. is low water.
The amount of refrigerant gas from 1. Adjust expansion valve.
evaporator is little. 2. Check Sol. v/v.
Discharge v/v of compressor is Examine valves and replace the
damaged. Defect parts.
The amount of refrigerant is Release refrigerant.
excessive.
L.P. is high
The opening of expansion v/v is Close expansion v/v while checking
excessive. L.P.
Pipe is clogged. Check and clean pipe line.
Refrigerant is not enough. Charge refrigerant gas.
The amount of L.O. is excessive. Check oil separator or reduce the
amount of oil in the compressor.
The opening of expansion v/v is not Open expansion v/v checking L.P.
L.P. is low
enough.
Element of expansion v/v is Replace element of expansion v/v
damaged.
The amount of refrigerant is little. Charge refrigerant.
Load is not enough. Raise the load of compressor.
SHILLA E&T Water Chiller For Ozone Generator. (NK-300)

Compressor has refrigerant liquid in 1. Check temperature of compressor

the cylinder. crankcase.
2. Check solenoid v/v and expansion
v/v.
Suction pressure is too low. 1. Charge refrigerant.
2. Check expansion v/v and solenoid
v/v.
Motor has low voltage or overloads. 1. Check OCR
2. Check motor control relay.
3. Adjust circuit breaker setting to full
Compressor starts
load Amp.
and stops for short
Bearings are installed tight 1. Check motor bearings.
time.
2. Lubricate motor bearings.
Three-phase power is short. Check wiring on the control panel.
Filter dryer is clogged or filled with Replace cores.
moisture
Sol. v/v or expansion v/v does not Check and repair.
work.
There is no load. Install load system.
The capacity of compressor is too Install load system.
large for load.
Suction strainer is clogged. Clean or replace if necessary.
Load is too much. Reduce load.
Suction pressure of compressor is 1. Change refrigerant.
Compressor runs low. 2. Check discharge pressure and
continuously but increase it.
does not keep up Control circuit is wrong. Check and repair wiring.
with the load. Compressor may be damaged. Check parts of compressor.
Thermostat does not work properly. Check or replace thermostat.
Dryer filter is dirty or clogged. Clean or remove.
SHILLA E&T Water Chiller For Ozone Generator. (NK-300)

Superheated suction gas evaporates 1. Adjust expansion v/v.

oil. 2. Supply cold liquid.
The oil level is low while operating. Change oil to compressor.
Oil does not return to compressor 1. Check float mechanism of oil
separator and clean orifice.
Oil is not enough in
2. Check and clean return line.
the compressor.
Capacity of oil separator is not Replace oil separator with proper
enough. capacity.
Refrigerant liquid remains and does 1. Supply hot gas to evaporate liquid.
not discharge from compressor 2. Adjust expansion v/v and solenoid
properly. v/v.
Coupling is loose Tighten coupling.
Coupling is not properly aligned. Check and align if required.
Motor bearing is installed tight or Loosen bearing and check wiring.
wiring is wrong.
Calibration is wrong. Adjust if necessary.
Compressor is noise
Foundation is not even. Tighten mounting bolts or install
or Sound strange.
supporter on the bottom.
Check compressor if noise comes Check and repair if necessary.
from inner side.
Refrigerant liquid remains in the Supply hot gas to evaporate liquid.
compressor.
The flow of refrigerant is not 1. Clean dryer filter.
enough. 2. Check expansion v/v and solenoid
v/v.
3. Charge refrigerant.
4. Lower the temperature of cooling
L.P. trip water to raise efficiency of heat
exchange.
The location of bulb for expansion Change location of bulb.
v/v is wrong.
Heat exchange of surface in the Clean the tube.
evaporator is not efficient.
1. Cooling water or fuel oil to unit 1. Check the amount of cooling water
is not enough. or fuel oil.
Flow alarm
2. Flow switch does not work 2. Adjust the clearance of the flow
properly. switch.
SHILLA E&T Water Chiller For Ozone Generator. (NK-300)

Thermal expansion valve does not Check expansion v/v. Refer to

supply Refrigerant . following solutions.
Refer to the following problems.
Compressor 1) Strainer is dirty. 1) Clean strainers.
operates on short 2) Orifice is closed with impurities. 2) Remove moisture or impurities.
cycle due to L.P trip 3) Element is damaged. 3) Replace element.
Evaporator tube is clogged or dirty. Check and clean tube.
Low –Pressure switch does not work Repair or replace Low Pressure
properly. switch.
Compressor The amount of cooling water is not Supplement cooling water.
operates on short enough.
cycle due to H.P trip H.P switch does not work properly. Check H.P. switch
1. Power is off. 1. Check power supply.
2. Switch is defective 2. Replace switch.
Compressor does 3. Fuse is cut. 3. Replace fuse.
not start 4. Overload relay is tripped. 4. Reset OCR.
5. Low voltage. 5. Check voltage by electric tester.
6. Motor coil is burned. 6. Check insulation resistance of
motor and replace motor coil.
7. H.P or W.P switch is triped. 7. Reset H.P and W.P
Voltage is low or One of three- 1. Check voltage and motor terminal.
Motor “hums” but phase is short. 2. Check power wiring circuit in the
does not start. control panel.
Compressor is unloaded. Check unloading system.
SHILLA E&T Water Chiller For Ozone Generator. (NK-300)

4-2. CLEANING OF CONDENSER

Cleaning must be carried out when the following problems are found. If any scale
isfound out on the inner surface of cooling tubes or if the temperature .difference is not
specific between inlet and outlet of fresh/sea water, then proper cleaning should be
carried out immediately. In case that the scale is found frequently on the inner surface of
cooling tubes, then overhauling for cover must be carried out.

(i) Checking
Take off water channel or cover to check tube inside.
(ii) Cleaning of Tube side.
(a) Discharge the drain completely.
(b) Take off channel and reversing cover.
(c) Assemble nylon brush like Fig.1 and clean inside of the tube with this brush.

Complete the following brush cleaning unit by assembling above A, B, C and D.

Insert the unit to the inside of the tube for cleaning.

FIG 1.ASSEMBLY OF NYLON BRUSH

SHILLA E&T Water Chiller For Ozone Generator. (NK-300)

4-3. MAINTENANCE OF CONDENSER

(i) Leakage inspection

It is necessary to check tube leakage by fresh water as the following procedure.

(a) Make inside of condenser completely empty (For both shell and cover side)
(b) Take channel cover out.
(c) Fill the inside of shell with fresh water and supply air or water of 1kg/cm2 or 14.2psi.
through the upper part of the shell.
(d) Make tube sheet dry totally so as to check water leakage conveniently.
(e) In case leakage is found, clog tube with tube plug.
(f) If a lot of tubes are plugged, heat transfer becomes inefficient and it decrease
performance ability of water cooling unit. In this case, tube bundle should be replaced
with new one.

(ii) Repairing the leakage

In case that leakage is observed, repair or replace it with new one like the following
procedure.

(a) Leakage from the expanded part of tube. Expand the tube again with an expansion
tool. If the leakage does not stop in spite of tube expansion, plug the tube or replace it
with new one.
(b) If leakage can’t be repaied by tube expansion, tube should be replaced. Tubes for
replacement are basically provided as the one of our standard spare part. For tube
replacement, please refer to Fig. 15.

1) Loosen bolts and take off cover 2) Separate tube end from tube
sheet by chisel
SHILLA E&T Water Chiller For Ozone Generator. (NK-300)

3) Push the damaged tube by 4) Inset a spare tube

push out tool and take it out.

5) Connect tube expander with S-handle 6) Insert flaring device(punch) hit

Rotate it in clockwise direction sides of tube.
at both it softly (it is called flaring)

7) Figure after flaring 8) Assemble cover

FIG.2 TUBE REPLACEMENT

SHILLA E&T Water Chiller For Ozone Generator. (NK-300)

5. Drawings
 SPECIFICATION
BASE PLATE
DETAIL OF "b"
NON SCALE
2 6 7
DETAIL OF "c"
NON SCALE TOP VIEW
7 7
"c"
1 10
5
9 20
3
"b"
19
8
LEFT VIEW FRONT VIEW RIGHT VIEW
WATER CHILLER
UNIT FOR OZONE GENERATOR
 27
1
11
24 23
12
11
11 13 17
5
17
19
19
11
16 11 17
25
7
19 6
17 26 20 17
22 21
19
18
17
P&I DIAGRAM
WATER CHILLER
N.K CO.,LTD WATER CHILLER PANEL
CHILLING UNIT (NK-300)
 tebook용
Outlet
N.K CO.,LTD WATER CHILLER POWER DIAGRAM
CHILLING UNIT (NK-300)
 WATER CHILLER CONTROL
N.K CO.,LTD
CHILLING UNIT (NK-300)
 P.L.C INPUT CARD
N.K CO.,LTD
CHILLING UNIT (NK-300)
 P.L.C OUTPUT CARD
N.K CO.,LTD
CHILLING UNIT (NK-300)
 Φ/ 4
N.K CO.,LTD WATER CHILLER CONNECTION
CHILLING UNIT (NK-300)
SHILLA E&T Water Chiller For Ozone Generator. (NK-150)

6. Manuals of Parts