Airwell VVWO Series User manual

IMPORTANT NOTE:
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22.AW.VVWO.220-335.R410A.IM.EN.03.30.Rev01
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Installation Manual
ODU VRF (VVWO Series)
R410A
English Manual
VVWO-220R-01T32
VVWO-280R-01T32
VVWO-335R-01T32

User Manual
This VRF series adopts “mode consistence”
control method, which means all the indoor
units can only operate cooling or heating at
one time.
To protect compressor, before startup, the
unit should be powered on over 12 hours
or oil superheat should be over 20°C. If the
unit is not used for a long time, please cut
off the power to save energy, or the unit will
consume the power. When the environment
temperature may be lower than 0°C, drain
off water in the system, prevent frost crack
system.
The waterproof rating of the machine is IPX0,
pay attention to the protection
The minimum heating water temperature
for this unit is 7 degrees Celsius, if lower
temperature heating is required, please
choose other low-temperature products
If some failures often occurs in the unit, such
as low pressure failure, low outlet water
temperature failure, low pressure difference
failure or low discharge temperature failure,
it may be due to the very low inlet water
temperature, or the very low water ow
rate, or the very low indoor temperature. If
it is conrmed that the cause of the failure
is among the above factors, the inlet water
temperature or the inlet water ow rate must
be increased.
Operation condition:
Operating Range of Air Conditioner
Condition Cooling Heating
The outdoor
environment
temperature
0-40°C
The outdoor
environment
humidity
<80%
Indoor temperature 17-32°C 15-30°C
Water inlet
temperature 7-45°C
Rated water ow
8HP: 4.8m3/h;
10HP: 6.0m3/h;
12HP:7.2m3/h
Contents
Safety ...........................................................1
Installation instruction...................................4
Product introduction......................................7
Exterior and installation dimensions...........17
Installation procedure .................................22
Electric wiring and the application ..............35
Failure code................................................53
Commissioning and the performance.........62
Move and scrap the air conditioning...........64
Warning
• If the supply cord is damaged, it must be
replaced by the manufacturer, its service
agent or similarly qualied persons in order
to avoid a hazard.
• 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.
• Children should be supervised to ensure
that they do not play with the appliance.
• This appliance can be used by children
aged from 8 years and above and
persons with reduced physical, sensory or
mental capabilities or lack of experience
and knowledge if they have been given
supervision or instruction concerning use of
the appliance in a safe way and understand
the hazards involved. Children shall not
play with the appliance. Cleaning and user
maintenance shall not be made by children
without supervision.
• The appliances are not intended to be
operated by means of an external timer or
separate remote-control system.
• Keep the appliance and its cord out of reach
of children less than 8 years.

1
Safety
• This manual should always be accessible and close to this air condition equipment.
• There are two types of indications, " WARNING" and " CAUTION". The indication
preventing from death or heavy injury is listed as " WARNING". Even the indication listed as
" CAUTION" may also cause serious accident. Both of them are related to safety, and should
be strictly followed.
• After installation and start-up commissioning, please handover the manual to the user. The
manual should be well kept in safety place and close to the unit.
• The installation or the maintenance should be performed by an authorized agency. The wrong
operation of this air condition equipment may cause water leakage, electric shock, re, etc.
• Please install the unit on the top of a solid foundation or structure which is strong enough to
support the unit.
• The installation of this air condition equipment should follow local construction codes.
• Use the right cable size, secure the terminal rmly, organize the cables well and make sure no
tension is added on cables. Cable insulation should not be damaged. The incorrect installation
may lead to overheat or re.
• The circuit should be installed leakage protector,or it will cause electric shock.
• The ow switch in the accessory should be installed on the outlet water pipe.
• In winter, if you do not use for short periods of time, please ensure the machine 24 hours
power on, if you do not use for a long time, drain off the water in the system, prevent frost
crack system.
• When installing or moving the unit, the refrigerant system should be vacuumed and recharged
with R-410A refrigerant. If any other gas enters the system, it may lead to abnormal high
pressure which may cause damage or injury.
• Please use the proper manifolds or accessories during the system installation. The wrong
parts may cause refrigerant leakage.
• Keep the drain pipe away from toxic gas vents to prevent possible pollution of indoor
environment.
• During or after the installation, please check whether there is refrigerant leakage. If any
leakage, please take any measures for ventilation. The refrigerant may be toxic at some
concentration levels.
• The unit should be connected with closed water system.
• The unit is not explosion-proof. Please keep it away from ammable gases.
• The water pipe should be installed in accordance with this manual to ensure proper drainage.
The pipe should be well insulated to avoid condensation. Wrong installation may lead to water
leakage.
• Both liquid pipe and the gas pipe should also be well insulated. Defective insulation may
lead to system performance deterioration or humidity formation.
• Please keep children away from this air condition equipment.

2
Safety
• Grounding wire should be connected with the grounding bar. The grounding wire cannot
be connected to the gas pipe, water pipe, lightening rod or the telephone grounding wire.
Improper grounding may cause electric shock.
• Use the wrench to fasten the nut and are at proper torque. Excessive torque may cause
ared section to break, leading to refrigerant leakage.
• After refrigerant pipe installation, please take nitrogen leakage test to avoid refrigerant
leakage.
• R-410A is the only permitted refrigerant.
• To avoid charging wrong refrigerant, the diameter of check valve is changed for R-410A.
To strengthen the pipe, the dimension of ared pipe is also changed. Please use R-410A
specied tools as shown below.
R-410A specied tools Remarks
1Gauge manifold Range: HP ＞4.5MPa, LP ＞2MPa
2Charge hose Pressure: HP: 5.3MPa, LP: 3.5MPa
3Electronic weight meter for charging R-410A No other means are permitted
4Torque wrench
5Flaring tool
6 Copper pipe gauge for adjusting projecting margin
7 Vacuum pump tting Vacuum pump must be equipped with
check valve
8Leakage detector Only helium detector is permitted

3
• When charging refrigerant, the refrigerant must be in liquid state from the tank.
• To prevent EMC from interfering other appliances, please keep indoor unit, outdoor unit,
power cable and connecting wire at least 1m away from those appliances .
• Fluorescent lamp (reverse phase or rapid start type) may interfere the remote controller's
signal. Please install indoor unit away from uorescent lamp. The farther, the better.
• The temperature and ow of the outdoor unit inlet water need to conform to the requirements
of the specication, the water temperature is too low or the water ow is too small will cause
the unit malfunction.
• The quality of the circulating water must conform to the specications. otherwise it will
decrease the system life.
• The pipe for external devices water system should use corrosion resistant materials, otherwise
may cause corrosion.
• Water system Max. pressure is 1.6MPa, if the water pressure for the target ow switch is
greater than 1.6MPa, may affect the target ow work.
• Water ows too small protection, after the compressor operation, if the temp. difference
between Twi and Two is too large, the unit will standby and alarm, 100 seconds later resume
automatically, if it occurs three times in an hour, conrm the failure.
• If the inlet water temperature is below 10°C or the outlet water temperature is below 4°C, in
order to avoid the heat exchanger cracking due to the freezing water, the following measures
must be implemented:
The least inlet water ow rate must be over 70% of the rated value.
Add antifreeze such as ethylene glycol into the water system, and use corrosion inhibitors to
ensure the PH value of the water is about 7.5, or it will cause the heat exchanger corrosion
cracking.
Inform the technical personnel to carry out the necessary inspection and setting for the unit.
• If the outdoor unitislower than the indoor units and the high drop is less than 25 meters,
inletwater temperature can reach 7°C when cooling.
When heating , if inlet water is groundwater type, when the master unit has the maximum
water ow rate (1.5 times the rated value),the lowest inlet water temperature can be down to
5°C .
When heating , if the cooling capacity of the smallest indoor unit in the system is not less than
3.6kW, and the inlet water ow rate is not exceed the rated value, the maximum inlet water
temperature can be up to 50°C.
Safety

4
Installation & Startup Quick Guides
1. Installation Procedure
1.1 Drafting of diagram, select the installing place including the wiring and piping
1.2 Pre-installation, including pipe protective sleeves, hooks, supports, etc.
1.3 Indoor installation
1.3.1 Indoor DIP switch settings
1.3.2 Indoor unit installation
1.3.3 Refrigerant piping installation
1.3.4 Drain piping installation
1.3.5 Duct work when install the duct indoor unit
1.3.6 Heat insulation work, including refrigerant pipe and drain pipe
1.3.7 Electric wiring work
1.4 Outdoor installation
1.4.1 Outdoor unit foundation work
1.4.2 Outdoor unit installation
1.4.3 Refrigerant piping connection
1.4.4 Leakage test
1.4.5 Vacuum drying
1.4.6 Additional refrigerant charging
1.4.7 Outdoor maintenance panel installation
1.5 Water system installation
1.5.1 Piping connection
1.5.2 Water leak detection
1.5.3 System ushing
2. Startup Procedure
2.1 Check the power cables connection of each indoor unit
2.2 Check the communication wires connection of each indoor unit
2.3 Check the wired controller wires connection of each indoor unit
2.4 Set Protocol translator DIP switches if connected with central controller or BMS system
2.5 Check the central controller or BMS setting if the central controller or BMS device is used
2.6 Check the power cables connection of each outdoor unit
2.7 Check the P,Q connection and the communication among outdoors A,B,C connection
2.8 Check the indoor control type
2.9 Check the indoor communication address when in central control
2.10 Check the indoor central control address when in central control
2.11 Check the indoor group control address when in group control
2.12 Check the outdoor pipe length switch on outdoor PCB
2.13 Check the outdoor capacity over match switch setting on outdoor PCB
2.14 Check the outdoor unit address: the master unit must be No. 1
2.15 Check the outdoor units searching when multi units in combination
2.16 Check the outdoor capacity
2.17 Start commissioning according to the rotary switch function
2.18 Check if the pump and valve is open
Warning:
Please set DIP switches of indoor units before installing indoor units into their nal position
Installation instruction

5
For installation, please review the items below:
• Are the connected units quantity and the total capacity in the allowable range?
• Is the refrigerant pipe length in the limited range?
• Is the pipe size proper? And if the pipe is installed horizontally?
• Is the branch pipe installed horizontally or vertically?
• Is the additional refrigerant counted correctly and weighed by the standard balance?
• Is there refrigerant leakage?
• Can all the indoor power supplies be on/off simultaneously?
• Is the power voltage in compliance with the data marked on the rating label?
• Have the address of indoors and outdoors been set?
• If the control line of the target ow switch connect well?
• If the control line of the pump connect well?
• If the inlet and outlet water pipe install correctly?
• If the water temperature is within the scope of the restrictions?
• If the water ow is within the scope of the restrictions?
Installation instruction
(1) Accessories No. Name Quantity
1Flow switch 1
2Installation manual 1
3T shape pipe, only use for multiple modules 1
4Pipe adaptor 1 (10HP: 2)
(2) Before installation
1) Before installation, check respectively if the model, power supply, pipes, wires and
accessories purchased are correct.
2) Check if the indoors and outdoors can be combined as the following.
Outdoor Indoor
Gather pipe
Capacity
(100W) Combination type Indoor Qty Total indoor capacity (100W)
224 Single (8HP) 13 112-291
280 Single (10HP) 16 140-364
335 Single (12HP) 19 168-436
448 Combination (8HP+8HP) 23 224-582 TAS20
504 Combination (8HP+10HP) 29 252-655 TAS20
560 Combination (10HP+10HP) 33 280-728 TAS20
615 Combination (10HP+12HP) 36 307-800 TAS20
670 Combination (12HP+12HP) 39 335-871 TAS20
728 Combination (8HP+8HP+10HP) 43 364-946 TAS30
784 Combination (8HP+10HP+10HP) 46 392-1019 TAS30
840 Combination (10HP+10HP+10HP) 50 420-1092 TAS30
895 Combination (10HP+10HP+12HP) 53 448-1164 TAS30
950 Combination (10HP+12HP+12HP) 56 475-1235 TAS30
1005 Combination (12HP+12HP+12HP) 59 503-1307 TAS30
Name Model Function For what units
Outdoor branch pipe TAS20 Refrigerant gathering 2 Modules
TAS30 3 Modules

6
(3) Installation place selection
Installation instruction
Air-conditioner can't be
installed in the place with
ammable gas. Or it will
cause re hazard.
The outdoor unit should not
be installed at the place
where much water can drop
in.
The unit should be installed at
the strong enough place. Or it will
cause vibration and noise.
• It is better not install the unit
at the below places, or it will
cause damage.
• The place where there is
corrosive gas (spring area, etc).
• The place blowing salty air
(seaside, etc).
• The place existing strong coal
smoke.
• The place with high humidity.
• The place where there is device
emitting Hertzian waves.
• The place where voltage
changes greatly.
• During installation, install
the anti-vibration rubber
between the unit and the
bracket.
The outdoor unit should
not be installed next to
living rooms.
Note:
1. Do not install the unit at the place where the ammable gas will leak.
2. Install the unit at the strong enough place.
3. Install the unit at the at place.
4. After opening the electric box cover for maintenance, please x the cover with screw rmly.
(4) Transportation
• During transportation, please don't unwrap the packaging, and move the
unit to the installation location as closely as possible.
• Don't hang the unit only at two points. When hanging the unit, don't sit on
the unit. The unit should be upright.
• When removing the unit with the forklift, put the fork into the special
hole at the bottom of the unit. When being hanged, the rope should be 4
pieces of steel cable with over 6mm diameter.
• Put the cushion at the contact section between steel cable and the unit
against the distortion or damage.
• Forbid lifting the unit by lifting the wood bottom seat.
Note:
When multiple modules are installed, the outdoor unit should be ranked by capacity, the larger
capacity is closer to the main pipe of gather pipe.
Steel cable
Cushion

7
Product introduction
• Water Cooled VRF is a water-air heat pump air condition equipment which can deliver cooling
and heating by taking water as its heat source. Water acts as the heat-extraction source when
heating, while heat-absorption source when cooling. Thus there is no risk of frost formation on
condenser’s surface.
• Water Cooled VRF takes a water circulating loop as its heat and heat-extraction source. When
the water’s temperature in the loop is higher than the rated value because of the heat release
of the Water Cooled VRF (Cooling), the water will exchange the heat into the air through the
cooling tower. When the temperature is lower than the rated value, water heating is usually
utilized by the heating equipment or the waste heat.
• In a case of there are more than one Water Cooled VRF being installed, the whole system can
have some units running in cooling and other units running in heating, to realize the energy
saving of water side heat recovery.
Advantages
Attentions
Main Components
Energy-saving
The Water Cooled VRF delivers higher efciency compared with the air-air heat pump series
because of its low condensing temperature. Individual measure of electricity consumption
on this VRF equipment is available. For example, when the building is occupied by different
tenants, the electricity charge and maintenance cost can be counted separately. Cooling and
heating simultaneously in combination system can achieve inner balance of the energy, save the
operating time of the cooling tower and heating equipment, and achieve the purpose of energy
saving.
Flexible Application
As the efciency of the water system will not be affected by ambient temperature, users can
choose cooling or heating mode exibly in different seasons or based on practical requirements.
This Water Cooled VRF uses "Mode Consistence" control method without refrigeration side heat
recovery function, which means all the indoor units under same outdoor system can only run
either cooling or heating at one time.
The Water Cooled VRF is composed of two parts, parallel connected Water Cooled sets and
dual circulating pipes.
The main equipment and accessories include the following: cooling equipment; heating
equipment (heat exchanger unit or boiler); water treatment equipment; expansion tank; water
circulating pump; water ow switch.
Product introduction

8
Product introduction
a. Cooling circulation
b. Heating circulation
Operation chart
Closed-type
cooling tower
Expansion tank
Circulating
pump
Circulating
pump
Circulating
pump
Water inlet 30°CWater inlet 30°CWater inlet 30°C
Water
outlet
35°C
The outdoor units
Expansion tank
Boiler
Circulating
pump
Circulating
pump
Circulating
pump
Water inlet 20°CWater inlet 20°CWater inlet 20°C
The outdoor units
Water
outlet
15°C