Midea 130kW Air Cooled Scroll Chiller Owner’s Manual
- August 14, 2024
- Midea
Table of Contents
Midea 130kW Air Cooled Scroll Chiller
Specifications
- Product: Air-cooled Scroll Chiller
- Applicable Series: King Plus
- Model: 130kW & 260kW
- Power Supply Voltage: 380-415V 3N~50Hz
- Outlet Water Temperature Control Mode:
- Cooling: 0°C to 25°C
- Heating: 25°C to 50°C
Installation
Follow the installation manual provided with the unit for proper setup.
Operation
Ensure the power supply voltage is within the specified range. Use the wired controller to set the desired outlet water temperature.
performance
Operate the unit within the recommended outdoor temperature ranges for optimal
performance.
FAQs
Q: What should I do if I detect any abnormality such as a smell of fire?
A: Turn off the power supply immediately and contact your dealer for
instructions to prevent any hazards.
Q: Can I replace a blown fuse with a different rated one?
A: No, replacing a fuse with an incorrect rating may cause the unit to
break down or result in a fire. Always use the correct replacement fuse.
“`
Air-cooled Scroll Chiller
Applicable series: King Plus
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.
ACCESSORIES
Unit
Installation &
Operation Manual
Temperature testing
components of total water outlet
Wired controller
Installation manual of wired
controller
Flow controller
Qty.
1
1
1
1
1
Shape
AUXILIARY
Purpose
Use for installation (only need for setting the main module)
MAIN PARTS OF THE UNIT
1
1
2
2
3 3
4
5 4
5
7
7 6
6
Model 130kW
Model 260kW
NO.
1
2
3
4
5
6
7
NAME Air outlet Top cover
Air inlet
Electric Compressor Water outlet Water inlet
control box
OPERATION & PERFORMANCE
Performance characteristics of the unit
The air-cooled heat pump modular unit is composed of one or more modules. Each
module has its own independent electric control unit, and the electric control
units of modules conduct information exchange through communication network.
The air-cooled heat pump modular unit is characteristics of compact structure
and easy transportation and lifting, and in the meanwhile, it also saves
facilities, including cooling tower, cooling pump, and so on, for the user,
and reduces installation cost. The units provide central air handling devices
or terminal equipment with chilled water or hot water. The unit is a
completely independent entirety type one, which is designed to be installed
outdoors (on the ground or the roof).
Each unit includes such main parts as high-efficient and low-noise scroll compressor, air-cooled condenser, shell and tube (or plate) evaporator, micro- computer control center, and so on. These parts are installed on steel structure base, so they are sound and durable. The unit applies Chinese micro- computer control system, which can automatically conduct energy control according to the magnitude of load, to achieve optimal matching and thus actually realizing optimal energy-saving operation. The product is modularized unit, and parallel connection of 16 modules can be realized at most, so the user can adopt module combination according his own demands. The product can be widely applied in air-conditioning engineering of various newly-built and rebuilt industrial and civil buildings, such as restaurant, hotel, apartment, office building, hospital, industrial plant, and so on. The air-cooled heat pump modular unit is the best choice for the place which has high requirement in noise and ambient environment and which is short of water.
Use conditions of the unit
a. Model 130kW&260kW: The standard voltage of power supply is 380-415V
3N~50Hz, the minimum allowable voltage is 342V, and the maximum voltage is
440V.
b. Model 130kW&260kW: To maintain better performance, please operate the unit under the following outdoor temperature:
60
30
outdoor temperature () outdoor temperature ()
50 40 30 20 10 0 -10 -20
0
5
10
15
20
25
30
Outlet water temperature ()
Cooling operating range
25
20
15
10 5
0 -5
-10
-15
-20
0
10
20
30
40
50
60
Outlet water temperature ()
Heating operating range
c. Model 130kW&260kW: The unit is of outlet water temperature control mode Outlet water temperature control–cooling: minimum temperature 0, maximum temperature 25; heating: minimum temperature 25 , maximum temperature 50.
Low leaving water temperature mode can be set by wired controller.The “S1-3”
dialling in the main control board should be turn to
“on” before setting the temperature(see page 16 for details). If low leaving
water temperature function is effective, the operation range will extend to
the shadow area. When the setting water temperature is less than 5¥,
antifreeze liquid (concentration above 15%) should be added in the water
system, otherwise the unit and the water system will be damaged.
PRECAUTIONS
To prevent injury to the user or other people and property damage, the
following instructions must be followed. Incorrect operation due to ignoring
of instructions may cause harm or damage.
The safety precautions listed here are divided into two categories. In either
case, important safety information is listed which must be read carefully.
WARNING
Failure to observe a warning may result in death.
CAUTION
Failure to observe a caution may result injury or damage to the equipment.
WARNING
Ask your dealer for installation of the air conditioner. Incomplete
installation performed by yourself may result in a water leakage, electric
shock, and fire.
Ask your dealer for improvement, repair, and maintenance. Incomplete
improvement, repair, and maintenance may result in a water leakage, electric
shock, and fire.
In order to avoid electric shock, fire or injury, or if you detect any
abnormality such as smell of fire, turn off the power supply and call your
dealer for instructions.
Never replace a fuse with that of wrong rated current or other wires when a
fuse blows out. Use of wire or copper wire may cause the unit to break down or
cause a fire.
Do not insert fingers, rods or other objects into the air inlet or outlet.
When the fan is rotating at high speed, it will cause injury.
Never use a flammable spray such as hair spray, lacqueror paint near the unit.
It may cause a fire.
If the supply cord is damaged, it must be replaced by the manufacturer, its
service agent or similarly qualified persons in order to avoid a hazard.
2
Never inspect or service the unit by yourself. Ask a qualified service person
to perform this work.
Keep far away from high-frequency equipment.
Keep away from the following places: a place where it is full of oil gas;
places where salty air surrounding(near the coast); a place where is caustic
gas(the sulfide in hotspring). Location in the folling places may cause
malfunction or shorten the life span of the manchine.
In the cace of extremely strong wind, please prevent the air from flowing
backwards into the outdoor unit.
Snow canopy is necessary in sonwfall places on the outdoor unit. Please
consult the local dealer for details.
In the frequent thunderstruck place, lightning proof actions should be taken.
To prevent refrigerant leak, contact your dealer. When the system is installed and runs in a small room, it is required to keep the concentration of the refrigerant, if by any chance coming out, below the limit. Otherwise, oxygen in the room may be affected, resulting in a serious accident.
The refrigerant in the air conditioner is safe and normally does not leak. If
the refrigerant leaks in the room, contact with a fire of a burner, a heater
or a cooker may result in a harmful gas.
Turn off any combustible heating devices, ventilate the room, and contact the
dealer where you purchased the unit. Do not use the air conditioner until a
service person confirms that the portion where the refrigerant leaks is
repaired.
This appliance is not intended for use by persons (including children) with
reduced physical, sensory or mental capabilities, or lack of experience and
knowledge, unless they have been given supervision or instruction concerning
use of the appliance by a person responsible for their safety.
Do not dispose this product as unsorted municipal waste.Collection of such
waste separately for special treatment is necessary.
The water system is crucial for ensuring the reliable operation of the unit.
It is important to follow the installation requirements outlined in the
instruction manual to avoid damage to the unit. Please note that the company
cannot be held responsible for any damage caused by failure to meet these
requirements.
CAUTION
Do not use the air conditioner for other purposes. In order to avoid any
quality deterioration, do not use the unit for cooling precision instruments,
food, plants, animals or works of art.
Before cleaning, be sure to stop the operation, turn the breaker off or pull
out the supply cord. Otherwise, an electric shock and injury may result.
In order to avoid electric shock or fire, make sure that an earth leak
detector is installed.
Be sure the air conditioner is grounded. In order to avoid electric shock,
make sure that the unit is grounded and that the earth wire is not connected
to gas or water pipe, lightning conductor or telephone earth wire.
In order to avoid injury, do not remove the fan guard of the outdoor unit.
Do not operate the air conditioner with a wet hand. An electric shock may
happen.
Do not touch the heat exchanger fins. These fins are sharp and could result in
cutting injuries.
After a long use, check the unit stand and fitting for damage. If damaged, the
unit may fall and result in injury.
To avoid oxygen deficiency, ventilate the room sufficiently if equipment with
burner is used together with the air conditioner.
Arrange the drain hose to ensure smooth drainage. Incomplete drainage may
cause wetting of the building, furniture etc.
Never expose little children, plants or animals directly to the air flow.
Adverse influence to little children, animals and plants may result.
Notice to avoid places where operation noise may easily be spread away or be
enhanced.
Noise can be amplified by anything blocking the air outlet of outdoor unit.
Choose a proper place that the noise and hot or cold wind blown out of the
outdoor unit will not bring inconvenience to your neighbors and not affect the
growth or animal or plant.
Recommending locate and operate the equipment at the altitude height not
exceeded than 1000m.
Endurable temperature during transportation is -25~55. Such equipment could
endure 70 of the maximum temperature in 24hrs.
Do not allow a child to mount on the outdoor unit or avoid placing any object
on it. Falling or tumbling may result in injury.
Do not operate the air conditioner when using a room fumigation – type
insecticide. Failure to observe could cause the chemicals to become deposited
in the unit, which could endanger the health of those who are hypersensitive
to chemicals.
Do not place appliances which produce open fire in places exposed to the air
flow from the unit or under the indoor unit. It may cause incomplete combuston
or deformation of the unit due to the heat.
Do not install the air conditioner at any place where flammable gas may leak
out. If the gas leaks out and stays around the air conditioner, a fire may
break out.
The appliance is not intended for use by young children or infirm persons
withoutsupervision.
Children should be supervised to ensure that they do not play with the
appliance.
CAUTION
In parallel units, it is recommended to select the King plus series model as
the host machine, which is compatible with new functions.
TRANSPORTATION
Handling of the unit
The angle of inclination should not be more than 15º when carrying the unit,
to avoid overturn of the unit. a. 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. b. Lifting: the strength lifting rope (belt) can bear should be 4
times the weight of the unit. Check the lifting hook and ensure that it is
firmly attached to the unit. To avoid damages to the unit, the contact
position of the unit and lifting rope should be provided with an at least 50mm
thick wood block, cloth or hard paper. Any person is not allowed to stand
below the unit when lifting it.
Lifted cable
Lifted equipment At least 50mm thickness wood, cloth or hard paper (4 places)
Lifted hook
Lifted hook
Fig. 2-1 Lifting of the unit
3
3. INSTALLATION OF THE UNIT
3.1 Selection of installation sites
3.1.1 The unit can be installed on the ground or on the suitable roof, but
enough ventilation volume should be ensured in both cases. 3.1.2 The unit
should not be installed where noise and vibration are required to a certain
extent. 3.1.3 The installed unit should be sheltered from direct sunlight as
much as possible, and be far away from boiler flues and ambient air which may
erode condenser coils and copper tube parts of the unit. 3.1.4 If the
installed unit can be approached by unauthorized persons, safety measures of
isolation should be taken, such as rail guards. These measures will avoid
artificial damages and accidental damages, and prevent the control boxes from
being opened leading to exposure of electric components in operation. 3.1.5
The height of the installation foundation for the unit should not be less than 300mm, and floor drains are required in installation sites, to ensure smooth drainage and remove any seeper. 3.1.6 In case of installation on the ground, the steel base of the unit should be located on the concrete foundation, and the concrete plinth should extend below frozen soil layer. The foundation of the unit should not be connected to the foundation of the building, to avoid affecting the people due to transfer of noise and vibration.
The base of the unit is provided with installation holes, which can be used to connect the unit and the foundation firmly. 3.1.7 In case of installation on the roof, the roof must possess enough strength to sustain weight of the unit and maintenance personnel. The unit can be supported on concrete foundations or channel steel frames similar to those used in the unit installation on the ground. The load-bearing channel steel must be in alignment with the installation holes of the unit damper, and the channel steel should possess enough width for installing the damper. 3.1.8 Consult the building contractor, the architectural designer or other specialists about the cases with special installation requirements.
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 influence the surrounding environment.
Top view(130KW)
D A
Front view(260KW)
Top view(260KW) Fig. 3-1 A G
I
Only for Model 260KW Hole for anchor bolt15
Bottom view Fig. 3-2
C
B
B
Table 3-1
Model Model 130kW
A(mm) B(mm) C(mm) D(mm)V E(mm) F(mm) G(mm) H(mm) I(mm)
2200 1120 2315 390 1420 350 1460 1017
Model 260kW
2753 2200 2415 1376.5 755.5 300 1947 2120 973.5
3.3 Requirements of arrangement space of the unit
3.3.1 Requirements of arrangement space of the unit
3.3.1.1 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. 3.3.1.2 If the unit is
installed where the flowing 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 flow 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 of the minimum installation space of the unit. 3.3.1.3 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 flows through the coils smoothly.
NOTE
After installing the spring damper, the total height of the unit will increase
by 135mm or so. The ports of inlet and outlet pipes should be flange ports,
and flanges should be hubbed slip-on-welding steel pipe flanges.
Input of airflow
B
A
D
Main unit
C
Input of airflow
E
Input of airflow
Input of airflow
Main unit
Table 3-2
Fig. 3-3
Installation space (mm)
A
1500
B
1500
C
1500
D
1500
E
3000
5
3.4 Space requirements for parallel installation of multiple modular units
To avoid back flow of the air in the condenser and operational faults of the
unit, the parallel installation of multiple modular units can follow the
direction A and D as shown in Fig. 3-3, the spaces between the unit and the
obstacle are given in Table 3.1, and the space between adjacent modular units
should not be less than 1500mm; the installation can also follow the direction
B and C as shown in Fig. 3-3, the spaces between the unit and the obstacle are
given in Table 3-1, and the space between adjacent modular units should not be
less than 1500mm; the installation can also follow the direction combination
of A and D, and B and C, the spaces between the unit and the obstacle are
given in Table 3-1, the space between adjacent modular units in the direction
A and D should not be less than 1500mm, and the space between adjacent modular
units in the direction B and C should not be less than 1500mm. If the spaces
mentioned above cannot be met, the air passing from the unit to the coils may
be restricted, or back flow of air discharge may occur, and the performance of
the unit may be affected, or the unit may fail to operate.
3.5 Installation foundation
a. The unit should be located on the horizontal foundation, the ground floor or the roof which can bear operating weight of the unit and the weight of maintenance personnel. Refer to Table 9.1 (Table of applicable models and parameters) for operating weight. b. 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. c. The scaffold must be able to bear the weight of maintenance personnel and maintenance facilities. d. The bottom frame of the unit is not allowed to be embedded into the concrete of installation foundation.
3.5.1 Location drawing of installation foundation of the unit: (unit:
mm)
370
1460
1017
Drainage channel
Anchor bolt
Fig. 3-4
Schematic diagram of installation dimension of Model 130kW.
403
1947
973.5
2120
80
Drainage channel
Anchor bolt
Fig. 3-5 Schematic diagram of installation dimension of Model 260kW.
Drainage channel Concrete Cement mortar
Only for Model 260kW Installation foundation diagram of Model 130KW&260kW.
Fig. 3-6
3.6 Installation of damping devices
3.6.1 Damping devices must be provided between the unit and its foundation.
By means of the 15mm 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.3-3(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.
3.6.2 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. c. Remove the clamp
nuts of the damper. Step 3. Place the unit on the damper, and align the fixing
bolt holes of the damper with the fixing holes on the unit base. Step 4.
Return the clamp nuts of the damper to the fixing 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.
NOTE
It is recommended that the damper should be fastened on the foundation with
the provided holes. After the unit is placed on the foundation, the damper
connected with the unit should not be moved, and the central clamp nut is not
allowed to be tightened before the damper sustains load.
Anchor bolt M12 Nut Ferrol Damping device
Fig. 3-7
Fixed meatal plate
Fig. 3-8
3.7 Remove the transportation fasteners and vibration reduction materials
To prevent deformation and damage during transportation, it was added
fasteners or vibration reduction materials on the key places when the unit
left factory. Remove the transportation fasteners and vibration reduction
materials before installing and debugging the unit.
Before installation and debugging, please first dismantled three “L” shape
fixed metal plates, and install the bolts and gaskets with the. Bolts
fastening torque: 12±1N.m.
6
3.8 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
- 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.
3.8.2 Precautions for designing a snow cover - 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.
- The protective cover must be strong enough to withstand the snow weight and the pressure caused by strong wind and typhoon.
- The protective cover must not cause short circuit of air discharge and suction.
WATER SYSTEM INSTALLATION
(c) Snow falling on the equipment
(d) Air inlet blocked by snow wind with snow
(e) Equipment covered with snow
Fig. 3-9 Types of problems caused by snow
3.8.1 Measures used to prevent problems caused by snow
- 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
4.1 Basic requirements of connection of chilled water pipes
CAUTION
After the unit is in place, water pipes can be laid. The relevant installation
regulations should be abided with when conducting connection of water pipes.
The pipelines should be free of any impurity, and all chilled water pipes must
conform to local rules and regulations of pipeline engineering.
Connection requirements of chilled water pipes a. All chilled water pipelines
should be thoroughly flushed, to be free of any impurity, before the unit is
operated. Any impurity should not be flushed to or into the heat exchanger.
b. Water must enter the heat exchanger through the inlet; otherwise the
performance of the unit will decline.
c. The inlet pipe of the evaporator must be provided with a target flow
controller, to realize flow-break protection for the unit. Both ends of the
target flow controller must be supplied with horizontal straight pipe sections
whose diameter is 5 times that of the inlet pipe. The target flow controller
must be installed in strict accordance with “Installation & Regulation Guide
for Target Flow Controller” (Figure 4.3~4.4). The wires of the target flow
controller should be led to the electric cabinet through shielded cable (see
Electric Controlling Schematic Diagram for details). The working pressure of
the target flow controller is 1.0MPa, and its interface is 1 inch in diameter.
After the pipelines are installed, the target flow controller will be set
properly according to the rated water flow of the unit.
d. The pump installed in the water pipeline system should be equipped with
starter. The pump will directly press water into the heat exchanger of the
water system.
e. The pipes and their ports must be independently supported but should not be
supported on the unit.
f. The pipes and their ports of the heat exchanger should be easy to
disassemble for operation and cleaning, as well as inspection of port pipes of
the evaporator.
Fig. 3-10 Snow prevention base heightThe evaporator should be provided with a filter with more than 40 meshes per inch at site. The filter should be installed near to the inlet port as much as possible, and be under heat preservation. h. The by-pass pipes and by-pass valves as shown in Fig. 4-1 must be mounted for the heat exchanger, to facilitate cleaning of the outside system of water passage before the unit is adjusted. During maintenance, the water passage of the heat exchanger can be cut off without disturbing other heat exchangers. i.
The flexible ports should be adopted between the interface of the heat exchanger and on-site pipeline, to reduce transfer of vibration to the building. j. 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. k. All low positions of the water system should be provided with drainage ports, to drain water in the evaporator 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 ports should not be under heat preservation, to facilitate maintenance. l.
All possible water pipes in the system to be chilled should be under heat preservation, including inlet pipes and flanges of the heat exchanger. m. The outdoor chilled water pipelines should be wrapped with an auxiliary heating belt for heat preservation, and the material of the auxiliary heat belt should be PE, EDPM, etc., with thickness of 20mm, to prevent the pipelines from freezing and thus cracking under low temperature. The power supply of the heating belt should be equipped with an independent fuse. n. When the ambient temperature is lower than 2, and the unit will be not used for a long time, water inside the unit should be drained. If the unit is not drained in winter, its power supply should not be cut off, and the fan coils in the water system must be provided with three-way valves, to ensure smooth circulation of the water system when the anti-freezing pump is started up in winter. o. The common outlet pipelines of combined units should be provided with mixing water temperature sensor.
WARNING
For the water pipeline network including filters and heat exchangers, dreg or
dirt may seriously damages the heat exchangers and water pipes. The
installation persons or the users must ensure the quality of chilled water,
and de-icing salt mixtures and air should be
8
4.2 Connection drawing of pipeline system
N#Unit
Electronic Butterfly Valve
Two Tw
Twi
heat exchanger
Drain valve
Differential pressure by-pass valve
1#Unit
Electronic Butterfly Valve
Two Tw
Twi heat exchanger
0#Unit
Drain valve
Electronic Butterfly Valve
Two
Drain valve Auxiliary electric heater
Twi
heat exchanger
Drain valve
0#Unit Tw
Buffer tank
Expansion tank
Drain valve
Drain valve
Terminal Two-way valve
Three-way valve
Drain vavle Y-filter Expansion tank
Water pressure instrument Thermometer Safety valve
Symbol explanation Water flow switch Pump Soft joint
Gate valve Check valve Solenoid three-way valve
Fig. 4-1
Differential pressure by-pass valve Atmospheric exhaust valve
9
4.3 Selection of buffer tank
The role of the buffer water tank: In cooling mode, it prevents frequent
opening and stopping of the equipment, thus protecting it. The buffer water
tank serves different purposes depending on whether the system is in cooling
or heating mode. In heating mode, it ensures system stability during
defrosting and reduces the need for frequent start-stop of the unit under
small load conditions.
(1) Design calculation method a. Calculation of defrosting time under heating
conditions The most significant factor affecting the air source heat pump
heating system is the defrosting of the winter unit. To ensure thermal
stability, the main engine’s defrosting time should be limited to 4 minutes
during winter operation. Additionally, the water temperature before and after
defrosting should not decrease by more than 3¥. The buffer tank’s volume
should be calculated based on the above data. Heating conditions, minimum
effective water capacity calculation: MH = [Qh×Hmin× TH/(C× ¶TH)] / Where: MH:
minimum water capacity of the system, m3; Qh: rated heat production of the
main engine, kW; Hmin: coefficient of defrosting ability, %; Generally take:
50%; ¶TH : Water temperature drop before and after defrosting,¥; Conventional
units generally take 3¥; C: specific heat gain of water 4.18 kJ/(kg·¥); :
density of water,1000 kg/m 3; TH: defrosting time, S; Generally take 240S:
b. cooling running time calculation method During the cooling process, avoid
frequently opening and stopping the equipment to protect it. Ensure that there
is enough water to allow the equipment to run continuously for at least 5
minutes.
Refrigeration conditions, the minimum effective water capacity calculation:
MC=[QC×CA ×Cmin× TC/(C× ¶TC)] / Where: MC: minimum system water capacity, m3 ;
QC: cooling rated capacity,kW; CA: Capacity coefficient of small load
condition: generally: 1.6. Cmin: the minimum operating capacity ratio of the
unit, %; Fixed frequency according to 100%; Frequency conversion unit
according to 30%; ¶TC: Control temperature range, ¥; Factory default 4¥; C:
specific heat gain of water 4.18 kJ/(kg·¥); : density of water, 1000 kg/m3 ;
Tc :cooling operation time, S, generally 300S;
c. Calculate the system capacity according to the cooling and heating
conditions, and take the maximum value; M=MAX(MH,MC) Single cooling unit takes
Mc, single heating unit takes MH;
d. The effective water capacity of a water system refers to its total
capacity, including the main pipeline, water storage tank, and the normally
open end of the two-way valve involved in circulation during operation. M2 =V×
L Where: M2: effective water capacity of water system, m 3; L: Total length of
system pipeline, m; V: Water capacity m 3 /m per meter pipe length of each
model system pipeline.
e.Buffer tank volume refers to the minimum water capacity required to meet the
normal operation of the unit: Vmin = M M2 Vmin – Minimum volume of buffer
tank, m3 .
(2) Empirical Estimation Method For renovation projects where the system water
capacity cannot be estimated, the volume of the buffer tank can be estimated
empirically using the following formula: Vmin = Q × K. Here, Vmin represents
the minimum volume of the buffer tank in litres.The comfort air conditioning
requires 10 L/kW and the process air conditioning requires 15L/kW. The
stability of the system water temperature increases with a higher K value. The
main mechanism for heat is measured in kW.
(3) Precautions for buffer tank selection: a. The configuration of the buffer
tank depends on the specific project instance. If the water system capacity is
large or the end form is in the form of floor heating, the buffer tank should
not be added. However, increasing the size of the buffer water tank has
several advantages for the system’s operation. It helps to avoid frequent
opening and stopping of the main engine under small load conditions, prevents
defrosting of the main engine, and ensures that there is enough water in the
system to meet the unit defrosting requirements. This improves the comfort of
the unit. Therefore, it is necessary to comprehensively consider various
factors on the site from an investment perspective.
b. There are two methods to calculate the volume of the buffer tank. The
results differ, with method 1 being more accurate as it is based on actual
operation data analysis. Therefore, it is recommended to use method 1 for
actual design and selection. Method 2 is an empirical estimate.
c. When using multiple units in parallel, it is recommended to base the
calculation on the maximum capacity of the parallel unit.
WARNING
Adequate system water capacity is a necessary condition to ensure reliable
operation of equipment. Otherwise, it may cause frequent start and stop of the
compressor, shorten the service life of the compressor, cause large
fluctuations in defrosting water temperature during heating operation, and
result in abnormal defrosting. When the water capacity of the accounting
system is insufficient, the system must add a buffer water tank to meet the
minimum water capacity requirements for equipment operation.
10
4.4 Minimum chilled water flow
The minimum chilled water flow is shown in the table 4-2 If the system flow is
less than the minimum unit flow rate, the evaporator flow can be recirculated,
as shown in the diagram.
For minimum chilled water flow rate Evaporator
Recirculation
Fig. 4-2
4.5 Maximum chilled water flow
The maximum chilled water flow is limited by the permitted pressure drop in
the evaporator. It is provided in the table 4-2 If the system flow is more
than the maximum unit flow rate, bypass the evaporator as shown in the diagram
to obtain a lower evaporator flow rate.
For maximum chilled water flow rate Evaporator
Recirculation
Fig. 4-3
4.6 Minimum and Maximum water flow rates
Table 4-1
Item Model
Model 130kW Model 260kW
Water flow rate(m3/h)
Minimum
Maximum
17.9
26.9
36.5
54.7
4.7 Water Pump Selection and Installation
4.7.1 Water Pump Selection Requirements
The external linkage water pump must be controlled by the host logic program
and the signal should be linked with the external water pump control cabinet.
The water pump should be installed on the inlet pipe of the unit, and the
inlet/outlet pipe diameter of the water pump should be the same as the main
water pipe diameter. The inlet and outlet interfaces of the water pump should
be connected softly, and the foundation should have vibration damping
measures. The pump should be installed outdoors with rain, sun, and frost
protection measures. The selected pump power should meet the required
flow/head performance curve at any point and ensure that there are no humps or
inflection points in the working area. Standby pumps should be set up, with at
least one backup pump, to ensure that the water system remains operational
during maintenance and replacement of pumps. The standby pumps should be of
the same type as the primary pumps, and no more than three units should be in
operation at any given time. If the head of a pump cannot meet the water
pressure requirements at the most unfavorable points, tandem pumps can be used
to increase the head while keeping the flow rate constant. If the flow rate of
a single pump cannot meet the flow rate requirements at the most unfavorable
points, parallel pumps can be used to increase the flow rate of the entire
system while maintaining the same pressure at the water pump outlet.
4.7.2 Calculation of water pump selection (1) Flow rate selection calculation
For the primary pump system, the water pump’s rated flow rate should be equal
to or greater than the unit’s rated flow rate. In parallel mode, the water
pump’s rated flow rate should be equal to or greater than the sum of the rated
flow rates of the parallel units. The secondary pump system requires a host
side circulating pump flow (L1) that is equal to or greater than the unit’s
rated flow. The end user side circulating pump flow (L2) can be calculated
using the following formula: L2= c1.1j1.2 × cQ x 0.86 / T L2- circulating
water flow m 3/h Q – Total terminal load kW T – Temperature difference of
inlet and return water at the end ° C
(2) Head selection calculation Primary pump system, pump head: H=H1+H2 On the
host side: H1= (h11+h12) x (1.1 to 1.2) Terminal side: H2= (h21+h22)× (1.1 ~
1.2) Where: h11– water resistance of main engine, unit: m h12– the most
unfavorable water pipe resistance on the main engine side, unit: m. Including
the sum of water pipe resistance and various valve body resistance; h21– end
water resistance, unit: m h22– the most adverse pipe resistance on the end
side, unit: m. Including water pipe resistance and the sum of various valve
resistance;
The calculation method for the head of the secondary pump system should take
into account the head of the primary pump, the H1 head of the host-side
circulating water pump for unit water resistance and piping water resistance,
the height difference between the tank and the host, and the open water
system. It is recommended that the total head value should not be less than 18
meters. For open systems, the height difference between the tank and the host
must be considered when dealing with the user-side circulating water pump head
H2, which is subject to the end of the water resistance and the most
unfavorable loop water resistance.
11
4.8 Water Quality Requirements
When using urban tap water for hot and cold water, scale buildup is rare.
However, when using well water or river water, more scale, sand, and other
sediments are produced. Therefore, it is necessary to filter and soften this
water with water softening equipment before it flows into the hot and cold
water system. Sand and soil settling in the water-side heat exchanger can
block the circulation of hot and cold water, leading to freezing accidents. To
prevent scaling and corrosion of equipment, it is important to analyze the
water quality before use, including factors such as pH value, conductivity,
chloride ion concentration, and sulfur ion concentration.
Water quality standards applicable to the unit
Table 4-2
test item
pH(25¥) turbidity Conductivity(25¥) Chloride ion Iron content calcium hardness
total alkalinity
units permissible value
/
7.5j8.0
NTU
3
S/cm
200
mg/L
50
mg/L
0.3
mg/L
80
mg/L
200
test item
units
Dissolved Oxygenturbidity mg/L
Organophosphorus (P) mg/L
Sulfide ion
mg/L
acid consumption
mg/L
Sulfide ion
mg/L
Ammonium ion
mg/L
silicon dioxide
mg/L
permissible value
not detectable not detectable
50 50 not detectable not detectable 30
WARNING
Water quality is crucial to ensure the normal and reliable operation of
equipment, otherwise it may cause damage to the unit casing or reduce its
lifespan. Therefore, it is necessary to ensure that the water quality meets
the requirements of equipment use.
4.9 Installation & regulation guide for target flow controller
4.9.1 Please carefully check flow switches before conducting installation of
the target flow controller. Packing should be in good condition, and the
appearance should be free of damage and deformation. If any problem, please
contact the manufacturer.
Flow switches can be installed in the horizontal pipeline 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.
4.9.3 Target flow controller 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 controller. The connection terminal should be located where
wiring connectioncan be easily done.
4.9.4 Pay attention to the following items when conducting installation and
wire connection: a. 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. b. To avoid electric shock and damages to the devices, the
power supply should be cut off, when wires are connected or adjustment is
done. c. 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 displacement, thus
leading to failure of flow switches.
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. e. 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. f. 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.
4.9.5 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 60% of rated water flow of the
unit, the target flow controller should be cut off and observed for 3 working
periods, and it should be covered with flow switch shell timely.
12
Schematic diagram of target flow controller
A
5A
5A
Fig. 4-4
Fig. 4-5
4.10 Installation of single-module water system pipeline
Water flow switch Total water outlet temperature sensor
Water outlet Water inlet Fig. 4-6 130 model
FS
Water flow switch
FS
FS
Total water outlet temperature sensor Water outlet Water inlet
Fig. 4-7 260 model
4.11 Installation of multi-module water system pipeline
Multi-module combination installation involves special design of the unit, so
relevant explanation is given as follows. 4.11.1 Installation mode of multi-
module combination water system pipeline
No.n module No.(n-1) address
No.(n-1) module No.(n-2) address
No.1 module No.0 address
Water flow switch
FS
F
F
Pump Drill dead hole at the position, and move the total effluent temperature
sensor at No.0 address to the position
Fig. 4-8 130 model (Only 16 modular units can be combined at most)
13
No.n module
No.(n-1) module
No.1 module
No.(2n-1)&No.(2n-2)address No.(2n-3)&No.(2n-4) address No.1 & No.0 address
Water flow switch
FS FS FS FS FS FS
Pump
Drill dead hole at the position, and move the total effluent temperature sensor at No.0 address to the position Fig. 4-9 260 model (Only 8 modular units can be combined at most)
4.12 Pipe diameter selectio
4.12.1 Pipe diameter calculation
Table 4-3
Pipe diameter/flow rate/flow table
pipe diameter
Q m3/h
(DN) 0.4m/s 0.6m/s 0.8m/s 1.0m/s 1.2m/s 1.4m/s 1.6m/s 1.8m/s 2.0m/s 2.2m/s 2.4m/s 2.6m/s 2.8m/s 3.0m/s
20 0.5 0.7 0.9 1.1 1.4 1.6 1.8 2.0 2.3 2.5 2.7 2.9 3.2 3.4
25 0.7 1.1 1.4 1.8 2.1 2.5 2.8 3.2 3.5 3.9 4.2 4.6 4.9 5.3 32 1.2 1.7 2.0 2.9 3.5 4.1 4.6 5.2 5.8 6.4 6.9 7.5 8.1 8.7
40 1.8 2.7 3.6 4.5 5.4 6.3 7.2 8.1 9.0 10.0 10.9 11.8 12.7 13.6 50 2.8 4.2 5.7 7.1 8.5 9.9 11.3 12.7 14.1 15.6 17.0 18.4 19.8 21.2
65 4.8 80 7.2
7.2 9.6 11.9 14.3 16.7 19.1 21.5 23.9 26.3 28.7 31.1 33.4 35.8 10.9 14.5 18.1 21.7 25.3 29.0 32.6 36.2 39.8 43.4 47.0 50.7 54.3
100 11.3 17.0 22.6 28.3 33.9 39.6 45.2 50.9 56.5 62.2 67.9 73.5 79.2 84.8 125 17.7 26.5 35.3 44.2 53.0 61.9 70.7 79.5 88.4 97.2 106.0 114.9 123.7 132.5 150 25.4 38.2 50.9 63.6 76.3 89.1 101.8 114.5 127.2 140.0 152.7 165.4 178.1 190.9
200 45.2 67.9 90.5 113.1 135.7 158.3 181.0 203.6 226.2 248.8 271.4 294.1 316.7 339.3 250 70.7 106.0 141.4 176.7 212.1 247.4 282.7 318.1 353.4 388.8 424.1 459.5 494.8 530.1
300 101.8 152.7 203.6 254.5 305.4 356.3 407.1 458.0 508.9 559.8 610.7 661.6 712.5 763.4 350 138.5 207.8 277.1 346.4 415.6 484.9 554.2 623.4 692.7 762.0 831.3 900.5 969.8 1039.1 400 181.0 271.4 361.9 452.4 542.9 633.3 723.8 814.3 904.8 995.3 1085.7 1176.2 1266.7 1357.2
450 229.0 343.5 458.0 572.6 687.1 801.6 916.1 1030.6 1145.1 1259.6 1374.1 1488.6 1603.2 1717.7 500 282.7 424.1 565.5 706.9 848.2 989.6 1131.0 1272.3 1413.7 1555.1 1696.5 1837.8 1979.2 2120.6
600 407.1 610.7 814.3 1017.9 1221.4 1425.0 1628.6 1832.2 2035.7 2239.3 2442.9 2646.5 2850.0 3053.6
Table 4-4
pipe diameter
Recommended flow rate m/s
(DN) 20
25
32
40
50
65
80
100 125 150 200 250 300 350 400
closed system 0.5-0.6 0.6-0.7 0.7-0.9 0.8-1 0.9-1.2 1.1-1.4 1.2-1.6 1.3-1.8 1.5-2.0 1.6-2.2 1.8-2.5 1.8-2.6 1.9-2.9 1.6-2.5 1.8-2.6
open system 0.4-0.5 0.5-0.6 0.6-0.8 0.7-0.9 0.8-1.0 0.9-1.2 1.1-1.4 1.2-1.6 1.4-1.8 1.5-2.0 1.6-2.3 1.7-2.4 1.7-2.4 1.6-2.1 1.8-2.3
In the general engineering calculation, the water pipe pressure is usually 0.1 ~ 0.6MPa, and the flow rate of water in the water pipe is 1 ~ 3m/s, often 1.5m/s.
d =
4Q 3.14v
14
Where: Q(m3/s)—- water flow through the pipe section d(m)—- inner diameter of the pipeline v(m/s)—- Assumed water flow rate (Recommended water flow rate in pipe is shown below, in m/s) If you need to calculate accurately, you should first assume the flow rate, and then calculate the Reynolds number according to the viscosity, density and pipe diameter of the water, and then calculate the resistance coefficient along the road from the Reynolds number, and the pipe fittings in the pipeline (such as tee, elbow, valve, reducer, etc.) are checked to find the equivalent pipe length. Finally, the pressure loss of the main pipe is calculated from the resistance coefficient along the path and the total length of the pipe (including the equivalent length of the pipe), and the actual flow rate is calculated according to Bernoulli formula, and the actual flow rate is calculated again according to the above process until both are close (iterative test algorithm). Therefore, it is rarely used in practice. The approximate flow data can be queried according to the above table and the pipe diameter can be selected.
NOTE
Hydraulic calculation must be performed after the selection of the main water
pipe. If the resistance of the water line is greater than the lift of the
selected pump, the larger pump must be selected again, or the water pipe must
be increased by one size (see the following introduction for hydraulic
calculation).
4.12.2 Select water main specifications
The following values refer to the main inlet and outlet water pipe, not the
unit inlet and outlet water pipe. The data is for reference. Please refer to
the actual project.
Table 4-5
Rated cooling capacityckW Total inlet and outlet diameter
25Q40 40Q50 50Q80 80Q145 145Q210
DN32 DN40 DN50 DN65 DN80
Rated cooling capacityckW Total inlet and outlet diameter
210Q325
DN100
325Q510
DN125
510Q740
DN150
740Q1300
DN200
1300Q2080
DN250
CAUTION
Please pay attention to the following items when installing multiple modules:
Each module corresponds to an address code which cannot be repeated. Main
water outlet temperature sensing bulb, target flow controller and auxiliary
electric heater are under control of the main module. One wired controller and
one target flow controller are required and connected on the main module. The
unit can be started up through the wired controller only after all addresses
are set and the aforementioned items are determined. The wired controller is
500m away from the outdoor unit.
4.13 Design of the tank in the system
The expansion water tank is divided into two types: open and closed. Its
purpose is to maintain constant pressure and accommodate expansion water. The
closed expansion water tank is also known as an expansion tank. The open
expansion tank is connected to the atmosphere without pressure and is usually
installed at the suction inlet of the circulating pump, which should be 1 to 2
meters higher than the highest point of the system. The water supply of the
water tank is determined by the water level. In large systems, an expansion
tank should be set up for the primary pump water system if it is not equipped
with a buffer tank or heat storage tank in the open water system. In large
systems, an expansion tank should be set up for the primary pump water system
if it is not equipped with a buffer tank or heat storage tank in the open
water system. The expansion tank should be arranged at the highest point of
the water system to accommodate any excess water volume. The expansion tank,
also known as a closed expansion tank, can be installed in the suction inlet
of the circulating pump. It should not be connected to the atmosphere or
pressure. If the room is far away, it is not necessary to connect the
expansion tank to the room. In this case, the expansion tank can be connected
to the outdoor return water main. When selecting the capacity of the expansion
tank, ensure that specific terms, abbreviations, and symbols are used
consistently once they have been introduced. This type of expansion tank uses
constant pressure water supply and is commonly used in small systems. Capacity
selection of expansion tank: V= system water capacity x expansion coefficient
x safety margin The expansion coefficient ranges from 1 to 3%, and the safety
margin ranges from 1.1 to 1.2.
15
4.14 Capacity selection of auxiliary electric heater
1. Electric auxiliary heat use When repairing certain units of the system or
in the event of temporary faults (such as protection mechanisms), the system
is opened as a backup. It is important to ensure that the system can maintain
water temperature and heat production even in harsh conditions of low ambient
temperature, in order to compensate for any attenuation of heat production in
the unit under such conditions. 2. Electric auxiliary thermal linkage control.
If the ambient temperature is too low for the unit to turn on or if the
failure protection cannot be activated, the auxiliary heat heater will
automatically turn on according to the water temperature control program. This
ensures reliable operation of the customer’s water and the unit. 3. Electric
auxiliary thermal selection The figure below demonstrates that when the design
point and balance point are the same, the unit’s total heat production is
equal to the building’s heat load. In this case, electric auxiliary heat is
unnecessary.
Heating CapacityckW
Design point (balance point)
The heating capacity of the unit
Heating load Environment temperaturec¥
Fig. 4-10
If the design point and the balance point do not coincide, the heating capacity of the unit at the design point (Q2) will be less than the
building heat load (Q1). In this case, electric heating must be configured with a power output equal to the difference between Q1 and
Q2.
Heating CapacityckW
Design point Balance point
The heating capacity of the unit
Heating load Environment temperaturec¥
Fig. 4-11
5. ELECTRIC WIRING
5.1 Electric wiring
CAUTION
1. The air-conditioner should apply special power supply, whose voltage should conform to rated voltage. 2. Wiring construction must be conducted by the professional technicians according to the labeling on the circuit diagram. 3. The power wire and the grounding wire must be connected the suitable terminals. 4. The power wire and the grounding wire must be fasten up by suitable tools. 5. The terminals connected the power wire and the grounding wire must be fully fastened and regularly checked, in case to become flexible. 6. Only use the electric components specified by our company, and require installation and technical services from the manufacturer or authorized dealer. If wiring connection fails to conform to electric installation norm, failure of the controller, electronic shock, and so on may be caused.
16
7. The connected fixed wires must be equipped with full switching-off devices with at least 3mm contact separation. 8. Set leakage protective devices according to the requirements of national technical standard about electric equipment. 9. After completing all wiring construction, conduct careful check before connecting the power supply. 10. Please carefully read the labels on the electric cabinet. 11. The user’s attempt to repair the controller is prohibited, since improper repair may cause electric shock, damages to the controller, and so on. If the user has any requirement of repair, please contact the maintenance center. 12.The power cord type designation is H07RN-F. 13.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 rule. 14.That the appliance shall be installed in accordance with national wiring regulations
5.2 Power supply specification
Table 5-1
Item
Outdoor power supply
Model
Power supply
Manual switch
Fuse
Wiring
MC-SS130-RN1TL MC-SS260-RN1TL
380-415V 3N~50Hz
380-415V 3N~50Hz
160A 300A
160A 300A
According to the actual distance of wiring, 50 mm2or larger for each unit.
According to the actual distance of wiring, 150 mm2or larger for each unit.
NoteThe wire diameters should be selected according to the national wiring regulation.
5.3 Requirements of wiring connection
5.3.1 No additional control components are required in the electric cabinet (such as relay, and so on), and the power supply and control
wires not connected with the electric cabinet are not allowed to go through the electric box. Otherwise, electromagnetic interference may
cause failure of the unit and control components and even damages to them, which thus lead to protective failure.
5.3.2 All cables led to the electric box should be supported independently but by the electric box.
5.3.3 The strong current wires generally pass the electric box, and 220-230V alternating current may also pass the control board, so wiring
connection should conform to the principle of separation of strong current and weak current, and the wires of power supply should be kept
more than 100 mm away from the control wires.
5.3.4 Only use 380-415V 3N~50Hz rated power supply for the unit, and the maximum allowable range of voltage is 342V~440V.
5.3.5 All electric wires must conform to local wiring connection norm. The suitable cables should be connected to power supply terminal
through wiring connection holes at the bottom of the electric cabinet. According to Chinese standard, the user is responsible for providing
voltage and current protection for the input power supply of the unit.
5.3.6 All power supplies connected to the unit must pass one manual switch, to ensure that the voltages on all nodes of electric circuit of the
unit are released when the switch is cut off.
5.3.7 The cables of correct specification must be used to supply power for the unit. The unit should use independent power supply, and the
unit is not allowed to use the same power supply together with other electric devices, to avoid over-load danger. The fuse or manual switch
of the power supply should be compatible with working voltage and current of the unit. In case of parallel connection of multiple modules, the
requirements of wiring connection mode and configuration parameters for the unit are shown in the following figure.
5.3.8 Some connection ports in the electric box are switch signals, for which the user needs to provide power, and the rated voltage of the
power should be 220-230VAC. The user must be aware that all power supplies they provided should be obtained through power circuit
breakers (provided by the user), to ensure that all voltages on the nodes of the provided power supply circuit are released when the circuit
breakers are cut off.
5.3.9 All inductive components provided by the user (such as coils of contactor, relay, and so on) must be suppressed with standard
resistance-capacitance suppressors, to avoid electromagnetic interference, thus leading to failure of the unit and its controller and even
damages to them.
5.3.10 All weak current wires led to the electric box must apply shielded wires, which must be provided with grounding wires. The shield
wires and power supply wires should be laid separately, to avoid electromagnetic interference.
5.3.11 The unit must be provided with grounding wires, which are not allowed to be connected with the grounding wires of gas fuel pipelines,
water pipelines, lightning conductors or telephones. Improper earth connection may cause electric shock, so please check whether earth
connection of the unit is firm or not frequently.
Manual switch
Outdoor unit 1
Manual switch Manual switch
Outdoor unit 2
Outdoor unit 3
Manual switch
Outdoor unit 4
Outdoor power supply
Manual switch
Fig. 5-1
NOTE
Outdoor unit N
Only 16 modular units of 130KW can be combined at most. Only 8 modular units of 260KW can be combined at most.
17
5.4 Wiring steps
Step 1. Check the unit and ensure that it is connected with grounding wires
correctly, to avoid leakage, and the grounding devices should be mounted in
strict accordance with the requirements of electrical engineering rules. The
grounding wires can prevent electric shock. Step 2. The control box of the
main power switch must be mounted in a proper position. Step 3. Wiring
connection holes of the main power should be provided with glue cushion. Step
4. The main power and neutral wires and grounding wires of power supply are
led into the electric box of the unit. Step 5. The wires of the main power
must pass the bonding clamp. Step 6. Wires should be connected firmly to the
connection terminals A, B, C and N. Step 7. Phase sequences must be consistent
when the wires of the main power. Step 8. The main power should be located out
of easy reach of non-professional maintenance personnel, to avoid mal-
operation and improve safety. Step 9. Connection of control wires of water
flow switches: the wire leads (prepared by the user) of water flow switches
are connected to the connection terminals W1 and W2 of the main unit. Step 10.
Connection of control wires of auxiliary electric heaters: the control wires
of AC contactor of the auxiliary electric heater must pass the connection
terminals H1 and H2 of the main unit, as shown in Fig. 5-2. Step 11.
Connection of control wires of pump: the control wires of AC contactor of pump
must pass the connection terminals p1 and P2 of the main unit, as shown in
Fig. 5-3. Step 12. The connection way of the wire controller connects with
every signal wires from package units: signal wires X, Y, E are connected in
the same way of main wires connection method and accordingly connect to the
terminals X, Y, E in the wire controller.
Power supply (220-240V~50Hz) Power supply (220-240V~50Hz)
H2
H1
Overcurrent relay Control coil of AC contactor
P2
Switch (For trial run of pump)
P1
Overcurrent relay
Control coil of AC contactor
Fig.5-2
Fig.5-3
5.5 Electric control schematic diagram of the unit
5.5.1 Schematic diagram of connection and communication of the main unit and subordinate units (see Attached Picture) 5.5.2 Indicating diagram of electric control of main control board (see Fig.5-4)
67 10 12 14 17 20 23
2
3
45
8
9
11 13 16 1921 24 15 18 22
1
40 38
34 33
41 39 37 36 35 32
Fig.5-4
The picture is for reference only, refer to the actual board.
18
25
26 27
28 29
30 31
5.6 Detail description for parts in fig. 5-4
Table 5-2
No.
Detail information
CN19Input 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
1
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
CN27:Power port . DC12V
3
CN78:Outdoor units communication or HMI conmunication port.(fault code E2)
4
CN32:Electronic expansion valve B port.
5
CN41:Electronic expansion valve A port.
6
CN63:Current transformer I1. Used for detecting current of Compressor A.
7
CN16:Current transformer I2. Used for detecting current of Compressor B.
8
CN82: Fan module board conmunication port.(fault code F3)
9
CN30:High pressure sensor port.
10
CN37:T3A
Pipe temperature sensor of the condenser A (fault code E5)
11
CN47:Low voltage protection switch of system A.(Protection code P1)
12
CN48:High voltage protection switch of system A.(Protection code P0)
13
CN49:Discharge temperature protection switch of Compressor A.(protection code P0)
14
CN54:Compressor A protection switch port.
15
CN46:T4,outdoor ambient temperature sensor.
16
CN53: Compressor B protection switch port.
17
CN39:Taf,Water side antifreeze temperature.
18
CN40:Tw/T5
Total water outlet temperature sensor when several units are connected in
parallel.
19
CN59:Discharge temperature protection switch of Compressor B.(protection code P2)
20
CN38:T3B
Pipe temperature sensor of the condenser B (fault code E6)
21
CN58:High voltage protection switch of system B.(Protection code P2)
22
CN52:Low voltage protection switch of system B.(Protection code P3)
23
CN29:Unit water outlet temperature sensor.
24
CN31:Unit water inlet temperature sensor.
25
CN35:PRO-W,Water flow switch signal.
26
CN35:X Y and E,Outdoor units communication or HMI conmunication port.(fault code E2)
F 01
E
2
DIP switch for capacity
27
D
3
selection.
C
4
B
5
(Model 130kW&260kW
A
6
987
defaults 3)
ENC1 POWER
DIP switch 0-F of
F 01
E
2
outdoor unit
28
D
3
C
4
network address
B
5
is enabled, which
A
6
987
represent address
ENC2 ADDRESS 0-15.
Each modular part of modular unit has the same electric control function, and
the main unit and subordinate units can be set through address code on the
electric control board. The address code 0 # is provided as the main unit. The
priority of being the main unit is given to the unit with digital compressor,
and other addresses are subordinate units. Only the unit is chosen as the main
unit, its electric control can activate such functions as direct communication
with the wired controller, refrigerating and heating capability adjustment,
pump control, auxiliary electric heater control, total effluent temperature
detection and water flow switch detection.
Note: The model 260 is composed of two unit units, which have been set as
master-slave connection by default (1 # slave unit is near the water inlet
side, and 0 # host unit is on the other side); If there are more than 260
units in parallel, starting from the second 260, the address dials of the two
units in the second 260 need to be set to 2 # and 3 # respectively, and the
two units in the third 260 are 4 # and 5 #, and so on;
19
No.
Detail information
29
CN51:PH-PRO,Three-phase protector.(reversed)
S1
ON
ON S1-1 (reversed)
30
S1-2 10¥ temperature difference.creversed
1 234
S1-3 Refrigerated low effluent
S1-4 (reversed)
S2
ON
S2-1
ON Remote control valid.
31
S2-2 Auto defrosting valid.
1 234
S2-3 AC fan, conventional refrigeration.
S2-4 (reversed)
32
CN34:Program burn in port(WizPro200RS programming device).
33
CN21:The power supply port of the Compressor A.(220VAC)
34
CN7:The power supply port of the Compressor B.(220VAC)
35
CN5 and CN13:The crankcase heating belt.
OFF(default)
(reversed) 5¥ temperature difference.creversed Refrigerated conventional
effluent (reversed)
OFF(default) Remote control invalid. Auto defrosting invalid. DC fan, low
temperature refrigeration. (reversed)
36
CN4 and CN6:Injection solenoid valve.
37
CN10:Four-way valve A.
38
CN11:Four-way valve B.
Numerical code tube.
39
-
In case of stand-by, the address of the module is displayed;
-
In case of normal operation, 10. is displayed (10 is followed by dot).
-
In case of fault or protection, fault code or protection code is displayed.
40
CN65:One compressor of the system B(B1);Neutral wire;
41
CN55:One compressor of the system A(A1);Neutral wire.
CAUTION
1. 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. 2.
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.
20
6. TRIAL RUN
6.1 Points for attention prior to trial run
6.1.1 After the water system pipeline is flushed several times, please make
sure that the purity of water meets the requirements; the system is re-filled
with water and drained, and the pump is started up, then make sure that water
flow and the pressure at the outlet meet the requirements. 6.1.2 The unit is
connected to the main power 12 hours before being started up, to supply power
to the heating belt and pre-heat the compressor. Inadequate pre-heating may
cause damages to the compressor. 6.1.3 Setting of the wired controller. See
details of the manual concerning setting contents of the controller, including
such basic settings as refrigerating and heating mode, manual adjustment and
automatic adjustment mode and pump mode. Under normal circumstances, the
parameters are set around standard operating conditions for trial run, and
extreme working conditions should be prevented as much as possible. 6.1.4
Carefully adjust the target flow controller on the water system or the inlet
stop valve of the unit, to make the water flow of the system be 90% of the
water flow specified in Table 7-1.
6.2 Check item table after installation
Table 6-1
Checking item
Description
Yes
No
Units are fixed mounting on level base.
Ventilating space for heat exchanger at the air side is meeting for requirement
Whether installing site
Maintenance space is meeting for requirement.
is meet for requirements Noise and vibration is meeting for requirement.
Sun radiation and rain or snow proof measures are meeting for requirements.
External physical is meeting for requirement.
Pipe diameter is meeting for requirement
The length of system is meeting for requirement
Water discharge is meeting for requirement Water quality control is meeting for requirement
Whether water system is meeting for requirements
Flexible tube’s interface is meeting for requirement Pressure control is meeting for requirement Thermal insulation is meeting for requirement
Wire capacity is meeting for requirement
Switch capacity is meeting for requirement Fuse capacity is meeting for requirement Voltage and frequency are meeting for requirement Connecting tightly between wires
Whether electric wiring system is meeting for requirements
Operation control device is meeting for requirement Safety device is meeting
for requirement
Chained control is meeting for requirement Phase sequence of power supply is
meeting for requirement
21
6.3 Trial run
7. USE
6.3.1 Start up the controller and check whether the unit displays a fault
code. If a fault occurs, remove the fault first, and start the unit according
to the operating method in the “unit control instruction”, after determining
that there is no fault existing in the unit. 6.3.2 Conduct trial run for 30
min. When the influent and effluent temperature becomes stabilized, adjust the
water flow to nominal value, to ensure normal operation of the unit. 6.3.3
After the unit is shut down, it should be put into operation 10 min later, to
avoid frequent start-up of the unit. In the end, check whether the unit meets
the requirements according to the contents in Table 9.1.
CAUTION
The unit can control start-up and shut-down of the unit, so when the water
system is flushed, the operation of the pump should not be controlled by the
unit. Do not start up the unit before draining the water system completely.
The target flow controller must be installed correctly. The wires of the
target flow controller must be connected according to electric control
schematic diagram, or the faults caused by water breaking while the unit is in
operation should be the user’s responsibility. Do not re-start the unit within
10 min after the unit is shut down during trial run. When the unit is used
frequently, do not cut off the power supply after the unit is shut down;
otherwise the compressor cannot be heated, thus leading to its damages. If the
unit is not in service for a long time, and the power supply needs to be cut
off, the unit should be connected to the power supply 12 hours prior to re-
starting of the unit, to pre-heat the compressor.
7.1 Use conditions of the unit
5 1
6
2
7 3
8
4 9
16
AUXILIARY
10
11
11
15
(Press for 3sec to cancel timer)
12
(Press for 3sec to unlock)
14
13
Fig.7-1
1. Operation icon
10.ON/OFF Key
2. Mode area 3. Setting temperature 4. Timing On/Off 5. Function Icon 6. On- line Unit Qty. Indication
11.Right, Left Right Key 12.OK key 13. Setting key 14. Add, Reduce key
7. Reserved
15. Cancel key
8. Clock
16. Reserved. key
9. Water temp.
4
7.2 Operating instructions of buttons
1 Operation icon : Indicate the ON and OFF status; when it is ON,
it will display; when it is OFF, it will disappear;
2 Mode area: Indicate the main unit operating mode;
3 Setting temperature: 3 status can be displayed:
;
4 Timing ON/OFF indication
: Indicate the timing information;
5 Function icon 1) Computer: Display when connects to computer; 2) Maintenance: When the icon is lighted on it means should arrange professionals to do the cleaning maintenance; long press “AUXILIARY” for 3 seconds then this icon will be off, until the next maintenance; 3) E-heating: Display when the electric auxiliary heating water function is operated; 4) Check: Display when check function is operated; 5) Anti-freezing: Display when the main unit ambient temperature is below 2, to remind the main unit should be do the anti- freezing measurement; 6) Lock: When the icon is lighted on, it means the button has been locked (no keys operation for 2 minutes ), long press “OK” key for 3 seconds to unlock; 7) Error: When the main unit has error or protection, this icon will be displayed. The unit need to be maintained by professionals.
22
6 On-line unit qty. indication: Under normal status display the quantity of
the units connected to the wired controller; under check status display the
device serial number;
7 Reserved; 8 Clock: Under normal status display clock; during timing setting
it displays
the setting timing time; 9 Water temperature: Under normal status display
water temperature; during
water temperature setting it displays the setting numerical value; under the
check status display check parameter; Wired controller the check sequence is
as follows
1 Outlet water temperature Tou-> 2 Inlet water temperature Tin-> 3 Outdoor
ambient temperatures T4-> 4 Outdoor pipe temperatureT3A-> 5 Outdoor pipe
temperatureT3B-> 6 Current of the compressor IA-> 7 Current of the compressor
IB-> 8 Anti-frozen temperature T6-> 9 Electronic expansion valv opening FA->
10 Electronic expansion valv opening FB-> 11 Last one error or protection ->
12 Last second error or protection-> 13 Last third error or protection -> 1
Outlet water temperature Tou……
10 ON/OFF key: On and Off functions; 11 Right, Left key: Under main page to
press this key can query the setting
water temperature, setting timing etc; during timing setting press the right
key then shift to the next step setting; during spot check they are used to
turn over the unit parameter information; 12 OK key: After setting the
parameter then press this key to confirm. After keys locking then long press
this key for 3 seconds to unlock; 13 Setting key: Setting the water
temperature, timing, mode etc, long press this key for 3 seconds enter to the
check; 14 Add, Reduce key: Setting water temperature, timing, water level etc;
during spot check they are used to read over #0#15 units; 15 Cancel key:
During setting parameters press this key to cancel setting. After timing
setting and then long press this key 3 seconds to cancel timing; 16 Reserved
key.
Turn on the unit
Power up to module unit and initially deliver power to wired controller.
Press “setting” key to set the intended mode.
Press “Add/Reduce” key to set the intended temperature.
Press “OK” key to save the settings. Unit will run after press “ON/OFF” key 7
minutes later.
Turn off the unit
When intend to shut the unit
Press “ON/OFF” key To select turn-off settings
Fig.7-2
7.3 ON/OFF
Follow the following diagram for system ON/OFF
7.4 Control and protection function of unit
7.4.1 The unit has the following protection functions
- Current cut-off protection 2) Power supply phase sequence protection 3) Protection for over-low suction pressure 4) Protection for compressor overcurrent 5) Protection for compressor overload 6) Anti-freezing protection
- Protection for over-high discharge pressure 8) Protection for outlet and
inlet water temperature
7.4.2 The unit also has other control functions - Plug and play system 2) RS-485/TS232 Standard serial communication port
23
7.5 Troubleshooting
Table 7-1
Error
Possible reason
Detect and settle measure
Air or other non-condensing gas still Discharge gas from fluorin charging inlet. Re-vacuum the system if
in the system
necessary.
Over high air discharge pressure (Cooling operation)
Fins in the condenser are dirty or foreign substance blocking fins.
Insufficient chilling air volume or condenser fan error Excessive high air
suction pressure
Clean condenser fins.
Check and repair the condenser fan, recover the normal operation See
“Excessive high air suction pressure”
Excessive refrigerant charging volume Discharge the excessive refrigerant
Over high ambient temperature
Check ambient temperature
Over low air discharge pressure (Cooling operation)
Over cool air in the side of air heat exchanger
Refrigerant leakage or insufficient r efrigerant volume
Check ambient temperature Test leakage or charge sufficient refrigerant to the system
Excessive low air suction pressure See “Excessive low air suction pressure”
Over high air
Excessive refrigerant charging volume Discharge the excessive refrigerant
suction pressure
(Cooling operation) Over high temperature in chilling water inlet Check thermal insulation layer of water pipe and the specification of this layer
Over low air suction pressure (Cooling operation)
Insufficient water flow volume
Check temperature difference at water inlet and outlet, and adjust the water flow volume
Over low temperature in chilling water inlet and outlet
Check and installation state
Refrigerant leakage or insufficient refrigerant volume
Test leakage or charge sufficient refrigerant to the system
Incrustant in evaporator Insufficient water flow
Eliminate incrustant
Check temperature difference at water inlet and outlet, and adjust the water
flow volume
Over high air discharge pressure (Heating operation)
Air or other non-condensing gas still Discharge gas from fluorin charging inlet. Re-vacuum the system if
in the system
necessary.
Incrustant in water side of heat exchanger Eliminate incrustant
Over high temperature in chilling water inlet Check water temperature
Excessive high air suction pressure See “Excessive high air suction pressure”
Over low air discharge pressure (Heating operation)
Over low temperature of chilling water Check chilling water temperature
Refrigerant leakage or insufficient refrigerant volume
Test leakage or charge sufficient refrigerant to the system
Excessive low air suction pressure See “Excessive low air suction pressure”
Over high air
Over heat air in the side of air heat exchanger Check ambient temperature around it
suction pressure
(Heating operation) Excessive refrigerant charging volume Discharge the
excessive refrigerant
Over low air suction pressure (Heating operation)
Insufficient refrigerant charging volume Charge sufficient refrigerant to the system
Insufficient air flow volume
Check fan rotating direction
Air loop short-circuit
Reason about remove air short-circuit
Insufficient frost-removal operation
Error comes out from 4-way valve or thermal resistor. Replace a new one if necessary.
Compressor stops
Insufficient chilling water flow volume
because of freeze-proof
protection (Cooling
Gas still in water loop
operation)
Thermal resistor error
Error comes from pump or flow-type water volume control. Check and repair or
replace a new one.
Discharge air Upon error have been confirmed, please replace a new one.
Compressor stops because Over high air expelling pressure of Hi-pressure protection Hi-pressure switch error
See “Over high air expelling pressure” Upon error have been confirmed, please replace a new one.
24
Table 7-1
Error
Possible reason
Detect and settle measure
Compressor stops because of motor Overcurrent.
Over high air expelling pressure and air suction pressure
See “Over high air expelling pressure” and “Over high air suction pressure”
Hi-voltage or Lo-voltage, signal phase or phase unbalance
Confirm voltage not higher or lower than the rated voltage 20V
Short circuit comes out from motor or connecting interface
Confirm resistors at motor are connected corresponding to terminals
Overcurrent assembly error
Replace a new one
Compressor stops
Over high or over low voltage
because of integrate temperature sensor or air discharge
Over high air expelling pressure or excessive low air suction pressure
temperature protection. Component error
Confirm voltage not higher or lower than the rated voltage 20V
See “Over high air expelling pressure” and “excessive low air suction pressure
” Check the integrated temperature sensor after motor is cool down.
Filter in front (or rear) of expanding
Compressor stops
valve is blocked
because of Lo.-pressure protection
Lo-voltage switch error
Excessive low air suction pressure
Replace a new filter
If the switch is defective, please replace a new one. See “Excessive low air
suction pressure”
Abnormal noise gives out form compressor
Liquid refrigerant flows into compressor from evaporator result in liquid slugging.
Adjust refrigerant charge volume
Aging of compressor
Replace a new compressor
Compressor is unable to drive
Air side heat exchanger excessive frost
Overcurrent relay trip up, fuse burnt out Replace damaged assembly
Control circuit without power though Hi-voltage or lo-voltage protection
Check the wring of control system Reference to mention in above the parts of air suction and discharge pressure error
Coils in contactor are burnt out
Replace damaged assembly
Wrong connection of phase sequence Re-connect and adjust the any 2 wires among 3 phases
Water system error and flow type volume controller short connection
Check water system
Error signal delivered from wire controller Find out the error type and carry out the corresponding measure to settle
4-way valve or thermal resistor error Check the running state. Replace a new one if necessary.
Air loop short-circuit
Settle the short-circuit of air discharge
With noise
Fixing screws at panel are loosen
Fix up all assemblies
25
8. MAINTENANCE AND UPKEEP
8.1 Failure information and code
In case the unit runs under abnormal condition, failure protection code will
display on both control panel and wired controller, and the indicator on the
wired controller will flash with 5Hz. The display codes are shown in the
following table: Table 8-1
No. Code
Reason
1 E1 Power phase sequence error
2 E2 Communication error 3 E3 Error of total outlet water.temp sensor(Be valid for main unit) 4 E4 Error of unit outlet water.temp sensor
5 E5 Pipe temperature sensor in condenser A error 6 E6 Pipe temperature sensor in condenser B error
7 E7 Outdoor ambient temperature sensor error 8 E8 Output of the power protector error 9 E9 Water flow detection error(manual recovery) 10 EA (Reserved failure code)
11 Eb Freeze-proof temperature sensor in shell and tube exchanger error 12 EC Wire control detect that the units on-line have decreased 13 EF Error of inlet water temperature sensor
14 P0 High pressure or air discharge temperature protection error in system A (manual recovery) 15 P1 Low pressure protection System A (manual recovery)
16 P2 High pressure or air discharge temperature protection in system B (manual recovery) 17 P3 Low pressure protection System B (manual recovery) 18 P4 Current protection in system A (manual recovery) 19 P5 Current protection in system B (manual recovery) 20 PH Outlet and inlet water difference protection
21 1PU Fan A protection
22 2PU Fan B protection 23 PF Electronic locking 24 P8 (Reserved failure code)
25 P9 Protection of outlet and inlet water temperature difference 26 PA Low ambient temperature drive-up protection
27 Pb System anti-frozen protection 28 PC Anti-freezing pressure protection of the system A (manual recovery) 29 Pd Anti-freezing pressure protection of the system B (manual recovery)
30 PE Low-temperature protection of evaporator (manual recovery)
31 H8 High Pressure sensor error 32 H7 Voltage protection 33 F3 Fan module Communication error 34 H0 Outlet water too low protection 35 1F6 EXV A protection 36 2F6 EXV B protection
8.2 Ordinary displayed data
a. Ordinary displayed data are displayed in all display pages.
b. If the unit system is under running state, i.e. one or more than
one modular unit is under running operation, there will be a
dynamic display of
. If the system is under OFF state,
there is no display.
c. If the communication with the main unit modular unit is fail, it displays E2
d. If it is under the host computer network control, Net displays, otherwise there is no display.
e. If it is under wired controller locked or button locked state, it displays the lock mark. There will be no display after the lock is unlocked.
8.3 Treatment of display data
The data display area is divided into Up area and Down area, with two groups of two-digit half 7-segment digital display, respectively.
a.Temperature display Temperature display is used for displaying the total outlet water temperature of unit system, outlet water temperature ,condenser pipe temperature T3A of system A, condenser pipe temperature T3B of system B, outdoor environmental temperature T4, anti-freezing temperature T6 and setting temperature Ts, with allowable data display scope -1570. If the temperature is higher than 70, it is displayed as 70. If there is no effective date, it displays “– –” and indication point C is on.
b. Current display Current display is used for displaying modular unit system A compressor current IA or system B compressor current IB, with allowable display scope 0A~99A. If it is higher than 99A, it is displayed as 99A. If there is no effective date, it displays “– –” and indication point A is on.
c. Failure display It is used for displaying the total failure warning date of unit or that of modular unit, with failure display scope E0~EF, E indicating failure, 0~F indicating failure code. “E-” is displayed when there is no failure and indication point # is on at the same time.
d. Protection display It is used for displaying the total system protection data of unit or the system protection data of modular unit, with protection display scope P0~PF, P indicating system protection, 0~F indicating protection code. “P-” is displayed when there is no failure .
e. Unit number display It is used for displaying the address number of the currently selected modular unit, with display scope 0~15 and indication point
is on at the same time.
f. Display of online unit number and startup unit number They are used for displaying the total online modular units of the whole unit system and the number of the modular unit under running state, respectively, with display scope 0~16. Any time when the spot check page is entered to display or change modular unit, it is needed to wait for the up-to-date data of the modular unit received and selected by wired controller. Before receiving the data, the wired controller only displays “—-” on the data display Down area, and the Up area displays the address number of the modular unit. No page can be turned, which continues until the wired controller receives the communication data of this modular unit.
26
8.4 Query display
Press the “” or “” key of wire controller to adjust the main unit serial
number can query 16 sets main units’ status information from #0#15. Press ” ”
or ” ” to adjust the spot check sequence number of one main unit then can
query all the status information of this unit. Spot check content according to
the main unit model wired controller:
1 Outlet water temperature Tou-> 2 Inlet water temperature Tin-> 3 Outdoor ambient temperatures T4-> 4 Outdoor pipe temperatureT3A-> 5 Outdoor pipe temperatureT3B-> 6 Current of the compressor IA-> 7 Current of the compressor IB->
8 Anti-frozen temperature T6-> 9 Electronic expansion valv opening FA-> 10 Electronic expansion valv opening FB-> 11 Last one error or protection -> 12 Last second error or protection-> 13 Last third error or protection -> 1 Outlet water temperature Tou……
8.5 Care and maintenance
Maintenance period It’s recommended that before cooling in summer and heating
in winter every year, consult local air conditioner customer service center to
check and maintain the unit, to prevent air conditioner errors which bring
inconvenience to your life and work.
Maintenance of main parts Close attention should be paid to the discharge and
suction pressure during the running process. Find out reasons and eliminate
the failure if abnormality is found. Control and protect the equipment. See to
it that no random adjustment be made on the set points on site. Regularly
check whether the electric connection is loose, and whether there is bad
contact at the contact point caused by oxidation and debris etc, and take
timely measures if necessary. Frequently check the work voltage, current and
phase balance. Check the reliability of the electric elements in time.
Ineffective and unreliable elements should be replaced in time.
8.6 Removing scale
After long-time operation, calcium oxide or other minerals will be settled in
the heat transfer surface of the water-side heat exchanger. These substances
will affect the heat transfer performance when there is too much scale in the
heat transfer surface and sequentially cause that electricity consumption
increases and the discharge pressure is too high (or suction pressure too
low). Organic acids such as formic acid, citric acid and acetic acid may be
used to clean the scale. But in no way should cleaning agent containing
fluoroacetic acid or fluoride should be used as the water-side heat exchange
is made from stainless steel and is easy to be eroded to cause refrigerant
leakage. Pay attention to the following aspects during the cleaning and scale-
removing process: Water-side heat exchanger should be done be professionals.
Please contact the local air-conditioner customer service center. Clean the
pipe and heat exchanger with clean water after cleaning agent is used. Conduct
water treatment to prevent water system from being eroded or re-absorption of
scale. In case of using cleaning agent, adjust the density of the agent,
cleaning time and temperature according to the scale settlement condition.
After pickling is completed, neutralization treatment needs to be done on the
waste liquid. Contact relevant company for treating the treated waste liquid.
Protection equipments (such as goggles, gloves, mask and shoes) must be used
during the cleaning process to avoid breathing in or contacting the agent as
the cleaning agent and neutralization agent is corrosive to eyes, skins and
nasal mucosa.
8.7 Winter shutdown
For shutdown in winter, the surface of the unit outside and inside should be
cleaned and dried. Cover the unit to prevent dust. Open discharge water valve
to discharge the stored water in the clean water system to prevent freezing
accident (it is preferable to inject antifreezer in the pipe).
8.8 Replacing parts
Parts to be replaced should be the ones provided by our company. Never replace
any part with different part.
8.9 First startup after shutdown
The following preparations should be made for re-startup of unit after long-
time shutdown: 1) Thoroughly check and clean the unit. 2) Clean water pipe
system. 3) Check pump, control valve and other equipments of water pipe
system. 4) Fix connections of all wires. 5) It is a must to electrify the
machine before startup.
8.10 Refrigeration system
Determine whether refrigerant is needed by checking the value of suction and
discharge pressure and check whether there is a leakage. Air tight test must
be made if there is a leakage or parts of refrigerating system is to be
replaced. Take different measures in the following two different conditions
from refrigerant injection. 1) Total leakage of refrigerant. In case of such
situation, leakage detection must be made on the pressurized nitrogen used for
the system. If repair welding is needed, welding cannot be made until all the
gas in the system is discharged. Before injecting refrigerant, the whole
refrigeration system must be completely dry and of vacuum pumping. Connect
vacuum pumping pipe at the fluoride nozzle at low-pressure side. Remove air
from the system pipe with vacuum pump. The vacuum pumping lasts for above 3
hours. Confirm that the indication pressure in dial gauge is within the
specified scope. When the degree of vacuum is reached, inject refrigerant into
the refrigeration system with refrigerant bottle. Appropriate amount of
refrigerant for injection has been indicated on the nameplate and the table of
main technical parameters. Refrigerant must be injected from the low pressure
side of system. The injection amount of refrigerant will be affected by the
ambient temperature. If the required amount has not been reached but no more
injection can be done, make the chilled water circulate and start up the unit
for injection. Make the low pressure switch temporarily short circuit if
necessary. 2) Refrigerant supplement. Connect refrigerant injection bottle on
the fluoride nozzle at low-pressure side and connect pressure gauge at low
pressure side. Make chilled water circulate and start up unit, and make the
low pressure control switch short circuit if necessary. Slowly inject
refrigerant into the system and check suction and discharge pressure.
CAUTION
Connection must be renewed after injection is completed. Never inject oxygen,
acetylene or other flammable or poisonous gas to the refrigeration system at
leakage detection and air tight test. Only pressurized nitrogen or refrigerant
can be used.
27
8.11 Disassembling compressor
Follow the following procedures if compressor needs to be disassembled: 1) Cut
off the power supply of unit. 2) Remove power source connection wire of
compressor. 3) Remove suction and discharge pipes of compressor. 4) Remove
fastening screw of compressor. 5) Move the compressor.
8.12 Auxiliary electric heater
When the ambient temperature is lower than 2, the heating efficiency decreases
with the decline of the outdoor temperature. In order to make the air-cooled
heat pump stably run in a relatively cold region and supplement some heat lost
due to de-frosting. When the lowest ambient temperature in the user’s region
in winter is within 0~10, the user may consider to use auxiliary electric
heater. Please refer to relevant professionals for the power of auxiliary
electric heater.
8.13 System antifreezing
In case of freezing at the water-side heat exchanger interval channel, severe
damage may be caused, i.e. heat exchange may be broken and appears leakage.
This damage of frost crack is not within the warranty scope, so attention must
be paid to antifreezing. 1) If the unit that is shutdown for standby is placed
in an environment where the outdoor temperature is lower than 0, the water in
the water system should be drained.
2) Water pipe may be frozen when the chilled water target flow controller and
anti-freezing temperature senor become ineffective at running, therefore, the
target flow controller must be connected in accordance with the connection
diagram. 3) Frost crack may happen to water-side heat exchanger at maintenance
when refrigerant is injected to the unit or is discharged for repair. Pipe
freezing is likely to happen any time when the pressure of refrigerant is
below 0.4Mpa. Therefore, the water in the heat exchanger must be kept flowing
or be thoroughly discharged.
8.14 Wiring of “ON/OFF” weak electric port
First, corresponding parallel connect the “ON/OFF” port of the main unit’s electric control box,then, connect the “ON/OFF” signal (provide by user) to the “ON/OFF” port of main unit as follows.
0# electric control box “ON/OFF” port
0# electric control box “ON/OFF” port
Red
Red
0# electric control box “HEAT/COOL” port
Brown
0# electric control box “HEAT/COOL” port
Brown
Power (DC 12V) Main control board is provided
HEAT Power (DC 12V) Main control board is provided
COOL
Black
Black
8.16 Wiring of “ALARM” port
Connect the device provided by user to the “ALARM” ports of the module units
as follows.
electric control box “ALARM” port
Red
Device provided by user
Red
If the unit is operating unnormally,the ALARM port is closed,otherwise,the
ALARM port is not closed.
Power (DC 12V) Main control board is provided
O N Power (DC 12V) Main control board is provided
OFF
Blue
Blue
If the “ON/OFF” port is effective ,the “Net on” icon of the wire controller
will be flashing.
8.15 Wiring of “HEAT/COOL” weak electric port
First, corresponding parallel connect the “HEAT/COOL” port of the main unit’s
electric control box,then, connect the “ON/OFF” signal (provide by user) to
the “HEAT/COOL” port of main unit as follows.
28
RECORD TABLE OF TEST RUN AND MAINTENANCE
Table 8-2
Model: Customer name and address:
Code labeled on the unit: Date:
1. Whether there is sufficient water flow passing waterside heat exchanger? ( )
2. Whether leakage detection has been made on all the water pipe? ( )
3. Whether pump, fan and motor are lubricated?
( )
4. Whether unit has been through 30-minute operation?
( )
5. Check temperature of chilled water or hot water
Inlet (
)
Outlet (
)
6. check air temperature of air-side heat exchanger:
Inlet (
)
Outlet (
)
7. Check refrigerant suction temperature and superheating temperature:
Refrigerant suction temperature: ( ) ( ) ( ) ( ) ( )
Superheating temperature: ( ) ( ) ( ) ( ) ( )
8. Check pressure:
Discharge pressure: ( ) ( ) ( ) ( ) ( )
Suction pressure: ( ) ( ) ( ) ( ) ( )
9. Check running current: ( ) ( ) ( ) ( ) ( )
10. Whether unit has been through refrigerant leakage test? ( )
11. Whether unit inside and outside is cleared?
( )
12. Whether there is noise on all the panels of unit?
( )
13. Check whether the main power source connection is correct. ( )
29
RECORD TABLE OF ROUTINE RUNNING
Table 8-3
Model:
Date:
Weather:
Operation time: Startup (
Outdoor temperature
Dry bulb Wet bulb
Indoor temperature
High pressure
Compressor
Low pressure Voltage
Current
Air temperature of air-side heat exchanger
Inlet (dry bulb)
Outlet (dry bulb)
) MPa MPa V A
Shutdown (
)
Inlet
Temperature
of chilled
water or hot
water
Outlet
Current of cooling water pump or
A
hot water pump
Note:
30
9. APPLICABLE MODELS AND MAIN PARAMETERS
Table 9-1
Model
130kW
260kW
Cooling capacity
kW
Heating capacity
kW
Standard cooling input
kW
Cooling rated current
A
Standard heating input
kW
Heating rated current
A
Power supply
Operation control
Safety device
130
265
138
280
42.3
84
73
143.1
43
84.8
74.4
144.6
380-415V 3N~ 50Hz
Control of wired controller, auto startup, running state display, failure alert etc.
High or low pressure switch, freeze-proof device, water flow volume controller, Overcurrent device, power phase sequence device etc.
Refrigerant
Type Chargeing volume kg
Water pipe system
Waterflow volume m3/h
Hydraulic resistance lose kPa
Water side heat exchanger
Max. pressure MPa
Inlet and outlet pipe dia.
Air side heat exchanger
Type
Air flow volume m3/h
Outline dimension
N.W. of the unit Operation Weight Packing dimension
L mm W mm H mm
kg kg L×W×H mm
R410A
10×2 22.4
10×4 45.6
60
Shell & tube type heat exchanger
1.0
DN65
Fin coil model
DN100
39000
78000
2200 1120 2315 831 873 2250×1180×2445
2753 2220 2415 1890 1920 2810x2290x2450
Notes: the above data is measured base on the following working condition. Refrigeration mode under nominal working condition: water flow 0.172m3/(h·kW), outlet water temperature of chilled water 7, air inlet temperature of condenser 35. Heating mode under nominal working condition: water flow 0.172m3/(h·kW), outlet water temperature of hot water 45, air inlet temperature of condenser DB/WB 7/6.
31
32
Main (No.0)
L1 L2 L3 N
POWER 380Vj415V 3N~50Hz
CN56 PUMP
CN14 CN15 FROST ALARM HEAT PAN-HEAT HEAT
X Y E CN35 Pro_W
Remote alarm
Water flow switch
Auxilary (No.1)
L1 L2 L3 N
POWER 380Vj415V 3N~50Hz
CN56 PUMP
CN14 CN15 FROST ALARM HEAT PAN-HEAT HEAT
X Y E CN35 Pro_W
Water flow switch
The length of wire should be shorter than 500m
Connect with wired controller
Connect with other system 3
Connect with other system 3
XY E
XY E
10 0
Yellow (X)
Black Gray (E)
(Y)
Power Transformer AC220-240V/AC 10 V
AUXILIARY
(Press for 3sec to cancel timer)
(Press for 3sec to unlock)
Contactor Contactor
Pump
Notes The wiring diagram of auxiliary heater and
pump is just for reference ,please follow the instructions of corresponding
auxiliary heater products.
Please choose such accessory as power wire , switch of auxiliary heater
according to the actual parameter of products and national
L1 L2 L3 N
POWER 380Vj415V 3N~50Hz
L1 L2 L3 N
POWER 380Vj415V 3N~50Hz
Auxilary (No.15)
CN56 PUMP
CN14 CN15 FROST ALARM HEAT PAN-HEAT HEAT
X Y E CN35 Pro_W
Water flow switch
Connect with other system
Attached picture Networking communication schematic of main unit and auxiliary unit for MC-SS130-RN1TL
CN78 Y E X
Main (No.0)
CN78 Y E X
Auxilary (No.1)
CN56 PUMP
CN14 CN15 FROST ALARM HEAT PAN-HEAT HEAT
X Y E CN35 Pro_W
Remote alarm
Water flow switch
CN56 PUMP
CN14 CN15 FROST ALARM HEAT PAN-HEAT HEAT
X Y E CN35 Pro_W
L1 L2 L3 N
Water flow switch
CN78 Y E X
Auxilary (No.2)
CN78 Y E X
Auxilary (No.3)
CN56 PUMP
CN14 CN15 FROST ALARM HEAT PAN-HEAT HEAT
X Y E CN35 Pro_W
Water flow switch
CN56 PUMP
CN14 CN15 FROST ALARM HEAT PAN-HEAT HEAT
X Y E CN35 Pro_W
L1 L2 L3 N
Water flow switch
33
The length of wire should be shorter than 500m
Connect with wired controller
POWER 380Vj415V 3N~50Hz
XY E
XY E
10 0
Yellow (X)
Black Gray (E)
(Y)
Power Transformer AC220-240V/AC 10 V
AUXILIARY
(Press for 3sec to cancel timer)
(Press for 3sec to unlock)
Contactor Contactor
Pump
Notes The wiring diagram of auxiliary heater and
pump is just for reference ,please follow the instructions of corresponding
auxiliary heater products.
Please choose such accessory as power wire , switch of auxiliary heater
according to the actual parameter of products and national
L1 L2 L3 N
POWER 380Vj415V 3N~50Hz
Connect with other system 3
POWER 380Vj415V 3N~50Hz 3
Connect with other system
CN78 Y E X
Auxilary (No.14)
CN78 Y E X
Auxilary (No.15)
CN56 PUMP
CN15 FROST CN14 ALARM HEAT PAN-HEAT HEAT
X YE CN35 Pro_W
Water flow switch
CN56 PUMP
CN14 CN15 FROST ALARM HEAT PAN-HEAT HEAT
X Y E CN35 Pro_W
L1 L2 L3 N
Water flow switch
Connect with other system
POWER 380Vj415V 3N~50Hz
Attached picture Networking communication schematic of main unit and auxiliary unit for MC-SS260-RN1TL
16127100001457 V.H
c
80g 210*297mm() /
“#
$
$%
a
%& &’ ‘( ()
,8
Flow controller
20240122
a
Read User Manual Online (PDF format)
Read User Manual Online (PDF format) >>