Cooper & Hunter Multi VRF CHV5 HOME User manual

Models:
CHV-5SHH120NK
CHV-5SHH140NK
CHV-5SHH160NK
Thank you for choosing Air Conditioners, please read this owner’s manual carefully before operation and
retain it for future reference.If you have lost the Owner’s Manual, please contact the local agent or visit
www.cooperandhunter.com.
Cooper&Hunter reserves the right to interpret this manual which will be subject to any change due to
product improvement without further notice.
Cooper&Hunter, Inc. reserves the final right to interpret this manual.
Air Conditioners
Owner's Manual
Multi VRF CHV5 HOME

Preface
C&H CHV5 HOME, with the most advanced design and manufacturing technologies in the world, uses
eco-friendly refrigerant R410A as its cooling medium. For correct installation and operation, please read this
manual carefully. Before reading the manual, please note that:
(1) To ensure safety when operating this system, please strictly follow the instructions in this manual.
(2) The total capacity of running indoor units must not exceed 100% of the capacity of outdoor units.
Otherwise, cooling (heating) effect of each indoor unit would be poor.
(3) Make sure that this manual is kept by direct operators and maintainers.
(4) In case of malfunction, please examine the following items and contact our authorized service
centers as soon as possible.
1) Nameplate (model, cooling capacity, product code, ex-factory date)
2) Malfunction status (detailed description of conditions before and after malfunction occurs)
(5) All units have been strictly tested and proved to be qualified before ex-factory. To avoid damage or
operation failure which may be caused by improper disassembly, please do not disassemble units
by yourself. If disassembly is needed, please contact our authorized service centers.
(6) All graphics and information in this manual are only for reference. Manufacturer reserves the right
for changes in terms of sales or production at any time and without prior notice.
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.
Correct Disposal of this product
R410A:2087.5
This marking indicates that this product should not be disposed with other household
wastes throughout the EU. To prevent possible harm to the environment or human
health from uncontrolled waste disposal, recycle it responsibly to promote the
sustainable reuse of material resources. To return your used device, please use the
return and collection systems or contact the retailer where the product was purchased.
They can take this product for environmental safe recycling.

Contents
1 Safety Precautions................................................................................................................................................1
2 Product Introduction.............................................................................................................................................. 2
2.1 Names of Main Parts.................................................................................................................................2
2.2 Combinations of Indoor and Outdoor Units............................................................................................3
2.3 Operating Range........................................................................................................................................ 3
3 Preparation before Installation............................................................................................................................4
3.1 Standard Parts............................................................................................................................................4
3.2 Select Installation Location.......................................................................................................................4
3.3 Piping Work Requirements.......................................................................................................................5
4 Installation Instruction...........................................................................................................................................5
4.1 Dimension of Outdoor Unit and Mounting Hole.....................................................................................5
4.2 Connection Pipe.........................................................................................................................................6
4.3 Installation of Connection Pipe..............................................................................................................10
4.4 Disassembly of Compressor Feet.........................................................................................................14
4.5 Vacuum Pumping, Refrigerant Adding..................................................................................................14
4.6 Electric Wiring...........................................................................................................................................17
5 Check Items after Installation and Test Operation.........................................................................................18
5.1 Check Items after Installation.................................................................................................................18
5.2 Test Run....................................................................................................................................................18
6 Common Malfunction and Troubleshooting ....................................................................................................23
7 Malfunction Display.............................................................................................................................................24
8 Maintenance and Care.......................................................................................................................................28
8.1 Outdoor Heat Exchanger........................................................................................................................28
8.2 Drain Pipe.................................................................................................................................................28
8.3 Water Tank................................................................................................................................................28
8.4 Notice before Seasonal Use..................................................................................................................28
8.5 Maintenance after Seasonal Use..........................................................................................................28
8.6 Parts Replacement..................................................................................................................................29
9 After-sales Service..............................................................................................................................................29

CHV5 HOMEOwner's Manual
1
1 Safety Precautions
Never attempt! Improper operation may result in death or serious injury.
Be sure to observe! Improper operation may lead to personal injury or property damage.
Please install the unit according to
instructions in this manual. Read
this manual carefully before
starting up or checking the
machine.
Installation should be performed by
distributor or qualified technicians. Do
not install the product by yourself.
Improper installation may result in water
leakage, electric shock or fire hazard.
Before installation, please check
the power supply if it complies with
the requirement stated on
nameplate. Make sure that power
is safe.
Air conditioner must be properly
grounded through the receptacle to
avoid electric shock. The ground wire
should not be connected with gas pipe,
water pipe, lightening arrester or
telephone line.
When installing, specialized parts
and accessories must be used.
Otherwise, it may result in water
leakage, electric shock or fire
hazard.
Refrigerant R410Acan produce
poisonous gas once it meets fire, so
please ventilate the room immediately if
refrigerant leaks out during installation.
Diameter of power cord must be
large enough. Damaged power
cord or connecting wire must be
replaced by specialized electric
cable.
After the power cord is connected,
please install the cover of electric box to
avoid danger.
Nitrogen must be charged
according to technical
requirements.
Short circuit is forbidden. Do not cancel
the pressure switch, otherwise unit may
be damaged.
For units with wired controllers, do
not connect power supply until the
wired controller is well installed.
Otherwise, wired controller cannot
be used.
When installation is finished, please
check and make sure the drain pipe,
pipeline and electric wire are all well
connected so as to avoid water leakage,
refrigerant leakage, electric shock and
fire hazard.
Do not extend fingers or objects
into air outlet or return air grille.
If you use gas heater or petroleum
heater in the same room, please open
the door or window to maintain good air
circulation, otherwise the room may
become lack of oxygen.
Never start or stop the air
conditioner by inserting or
removing the power cord.
Do not turn off the air conditioner until it
runs for at least 5 minutes. Otherwise,
compressor oil return will be affected.
Children are not allowed to
operate the air conditioner.
Do not operate the air conditioner with
wet hands.

CHV5 HOME Owner's Manual
2
Please turn off and unplug your air
conditioner before cleaning.
Otherwise, it may cause electric
shock or personal injury.
Do not spray water on the air
conditioner, otherwise wire, malfunction
or electric shock will occur.
Do not expose the air conditioner
directly under damp or corrosive
surroundings.
Connect power 8 hours before
operation. Do not disconnect power
when you want to stop the unit in short
period of time, e.g. on one night. (This is
for protecting the compressor.)
Volatile liquid such as thinner or
gasoline will damage the
appearance of air conditioner.
(Please use soft dry cloth and wet
cloth with mild detergent to clean
the outer case.)
Under cool mode, do not set the indoor
temperature too low.
If abnormal condition occurs (e.g.
unpleasant smell), please turn off
the unit at once and disconnect
power supply. Then contact C&H
authorized service center. If the air
conditioner continues to operate
despite of abnormal condition, it
may be damaged and cause
electric shock or fire hazard.
Do not repair the air conditioner by
yourself. Improper repair will cause
electric shock or fire hazard. Please
contact C&H authorized service center
and ask professional technicians to
repair it.
Cooper&Hunter, Inc. will not assume responsibility for any personal injury or property loss caused by improper
installation, improper debugging, unnecessary repair or not following the instructions of this manual.
2 Product Introduction
Cooper&Hunter CHV5 HOME adopts inverter compressor technology. By changing the
displacement of compressor, stepless capacity regulation within range of 10%~100% can be realized.
Various product lineups are provided with capacity range from 12kW to 16kW, which can be widely used
in residential, commercial and working area and especially applicable to places with big load change. C&H
CHV5 HOME is absolutely your best choice.
2.1 Names of Main Parts
Fig.1

CHV5 HOME Owner's Manual
3
No.
①
②
③
④
⑤
⑥
Name
Motor
Fan blade
Electric box
assembly
High pressure gas
pipe valve
Gas pipe
valve
Liquid pipe
valve
2.2 Combinations of Indoor and Outdoor Units
(1) The total capacity of indoor units should be within 50%~100% of that of outdoor units. See below
the number of indoor units that can be connected to one outdoor unit:
Model
Sets of connectable
indoor units
Remark
CHV-5SHH120NK
2～6
CHV-5SHH140NK
2～7
CHV-5SHH160NK
2～8
(2) Select outdoor unit, hydro box and water tank:
Outdoor unit
Hydro box
Applicable water tank
Function
CHV-5SHH120NK
CHV-5SHH140NK
CHV-5SHH160NK
Hydro box
HB16NK
WT200FH3EK
WT300FH3EK
WT350FH3EK
WT400FH3EK
Air conditioning + Water heating + Floor heating
(3) CHV5 HOME can perform air conditioning function only or perform air conditioning with water
heating or floor heating function.Water heating and floor heating functions are realized through the
hydro box. Indoor unit can be a high-efficiency duct type unit, wall-mounted type unit, one-way
cassette type unit, residential standard static pressure duct type unit, etc. If indoor unit or hydro
box receives operation command, then outdoor unit will operate according to capacity demand. If
indoor unit and hydro box both stop operation, outdoor unit will stop as well.
2.3 Operating Range
Cooling
Outdoor temperature: -5℃～48℃
Heating
Outdoor temperature: -20℃～27℃
Water heating
Outdoor temperature: -20～45℃
Floor heating
Outdoor temperature: -7～21℃
Cooling + Water heating
Outdoor temperature: -5～48℃
Heating + Water heating
Outdoor temperature: -20～27℃
Heating + Floor heating
Outdoor temperature: -7～21℃

CHV5 HOME Owner's Manual
4
3 Preparation before Installation
Note: Graphics here are only for reference. Please refer to actual products. Unspecified dimensions are
all in mm.
3.1 Standard Parts
Please use the supplied standard parts as required.
Parts for Outdoor Unit
No.
Name
Appearance
Qty
Remark
1
User Manual
1
2
Wiring (match with
resistance)
1
Must be connected to the last
indoor unit of communication
connection
3
Corrugated pipe
2
4
Chassis plug
3
5
Drain connector
1
3.2 Select Installation Location
Never attempt! Improper operation may result in death or serious injury.
Be sure to observe! Improper operation may lead to personal injury or property damage.
Select a location which is strong
enough to hold unit’s weight so
that unit can stand still and erect.
Make sure the unit is not exposed to sun
and rain. And the location can resist
dust, typhoon and earthquake.
Please keep the unit away from
inflammable, explosive and
corrosive gas or waste gas.
Make sure the location has space for
heat exchange and maintenance so that
unit can operate reliably with good
ventilation.
Outdoor unit and indoor unit
should stay as close as possible to
shorten the length of refrigerant
pipe and reduce bend angles.
Select a location which is out of
children’ s reach. Keep the unit away
from children.

CHV5 HOMEOwner's Manual
5
If the outdoor unit is totally surrounded by walls, please refer to the following figures for space dimension:
Fig.2
3.3 Piping Work Requirements
Height difference between outdoor unit should be 0m. Please refer to the table below for piping work
requirements:
R410A Refrigerant System
Outer diameter (mm/inch)
Wall thickness (mm)
Φ6.35(1/4)
≥0.8
Φ9.52(3/8)
≥0.8
Φ12.70(1/2)
≥0.8
Φ15.9(5/8)
≥1.0
Φ19.05(3/4)
≥1.0
4 Installation Instruction
Note: Graphics here are only for reference. Please refer to actual products. Unspecified dimensions are
all in mm.
4.1 Dimension of Outdoor Unit and Mounting Hole
Unit Outline and Installation Dimension:
Fig.3

CHV5 HOME Owner's Manual
6
Unit: mm
Model
A
B
C
D
E
CHV-5SHH120NK
CHV-5SHH140NK
CHV-5SHH160NK
900
340
1345
572
378
4.2 Connection Pipe
4.2.1 Schematic Diagram of Piping Connection
Piping Connection of indoor unit, outdoor unit and hydro box
Indoor unit 1
Indoor unit 2
Indoor unit 3
Outdoor connection pipe
Liquid pipe
Branches of indoor units
Connection pipe between outdoor unit and the first indoor branch
Connection pipe between indoor branch and indoor unit
Connection pipe between indoor branch and indoor unit
Connection pipe between indoor branch and indoor unit
Connection pipe of indoor branches
Connection pipe of indoor branches
Connection pipe of indoor branches
Outdoor unit
Gas pipe
Hydro box
Fig.4
4.2.2 Allowable Length and Height Difference of Connection Pipe
Y-type branch joint is adopted to connect outdoor unit, indoor unit and hydro box. Connecting method is
shown below.

CHV5 HOME Owner's Manual
7
Note: Equivalent length of one Y-type branch is 0.5m.
The first
branch
h1
Water circulating pipe
Hydro box
Height difference between indoor units h2≤15m
Height difference between indoor and outdoor units H≤50m
The first
branch of
indoor unit
Indoor unit b
室外机
Equivalent length of the farthest connection
pipe of indoor first branch L≤40m
c
Equivalent length of the farthest connection pipe L≤150m
d
a
Indoor unit
Outdoor unit
Water tank with
internal coil
Indoor unit Indoor unit
Height difference between indoor units h2≤15m
Fig.5
Note: Hydro box must be connected to the first branch
Piping parameters of CHV-5SHH120NK, CHV-5SHH140NKand CHV-5SHH160NK:
Allowable
value
Connecting pipe
Total length (actual length) of connecting pipe
300m
L1+L2+L3+L4+L5+a+b+c+d+e
Length of the farthest connecting pipe
(m)
Actual length
120m
L1+L2+L3+L4+d
Equivalent length
150m
From the first indoor branch to the farthest indoor pipe
40m
L3+L4+d
Height difference between indoor and
outdoor units
Outdoor unit at upper
side
50m
——
Outdoor unit at lower
side
40m
——
Height difference between indoor units (including hydro box)
15m
h2
Height difference between outdoor unit and hydro box
10m
h1
Height difference between hydro box and water tank
3m
——
Distance between hydro box and the farthest connecting pipe of
outdoor unit
30m
L5
Horizontal distance between hydro box and water tank
10m
f
Distance between hydro box and the first branch
5m
e

CHV5 HOME Owner's Manual
8
4.2.3 Dimension of Connecting Pipe (Main Pipe) between Outdoor Unit and the First Branch
Dimension of connecting pipe from outdoor unit to the first branch is determined by the dimension of
outdoor connecting pipe.
Fig.6
Dimension of outdoor connection pipe:
Basic module
Pipe dimension
Connecting method
Gas pipe (mm)
Liquid pipe (mm)
High pressure gas
pipe (mm)
CHV-5SHH120NK
φ15.9
φ9.52
φ12.7
Flared joint
CHV-5SHH140NK
φ15.9
φ9.52
φ12.7
CHV-5SHH160NK
φ19.05
φ9.52
φ12.7
4.2.4 Selection of Indoor Branches
Select indoor branches according to the total capacity of downstream indoor units.
Fig.7

CHV5 HOME Owner's Manual
9
R410A
Refrigerant system
Total capacity of downstream indoor units X (kW)
Model
Y-type branch
X＜20
CH020N
20≤X≤30
CH030N
30＜X≤70
CH070N
70＜X≤135
CH135N
135＜X
CH270N
4.2.5 Dimension of Pipe between Indoor Branches
Select pipe between indoor branches according to the capacity of downstream indoor units; if the
capacity exceeds that of the outdoor unit, please select according to the capacity of outdoor units.
Fig.8
Total capacity of downstream indoor unit C(kW)
Gas pipe (mm)
Liquid pipe (mm)
C ≤5.6
Φ12.7
Φ6.35
5.6＜C≤14.2
Φ15.9
Φ9.52
14.2＜C≤22.0
Φ19.05
Φ9.52
4.2.6 Dimension of Pipe between Indoor Branch and Indoor Unit
Dimension of pipe between indoor branch and indoor unit should be consistent with the dimension of
indoor pipe.
Fig.9

CHV5 HOME Owner's Manual
10
Rated capacity of indoor unit C(kW)
Gas pipe (mm)
Liquid pipe (mm)
C≤2.8
Φ9.52
Φ6.35
2.8＜C≤5.0
Φ12.7
Φ6.35
5.0＜C≤14.0
Φ15.9
Φ9.52
14.0＜C≤16.0
Φ19.05
Φ9.52
16.0＜C≤28.0
Φ22.2
Φ9.52
Note: If the distance between indoor unit and its nearest branch is over 10m, then for the indoor unit
whose rated capacity is equal to or below 5.0kW, its liquid pipe shall be enlarged to a bigger size.
4.3 Installation of Connection Pipe
4.3.1 Precautions for the Installation of Connection Pipe
(1) Conform to the following principles during pipe connection: Connection pipe should be as short as
possible, so is the height difference between indoor unit, outdoor unit and hydro box. Keep the
number of bends as little as possible. Radius of curvature should be as large as possible.
(2) Install the connection pipe by braze welding. Please strictly follow the requirements for welding
process. Rosin joint or pin hole is not allowed.
(3) When laying the pipe, be careful not to distort it. Radius of bending parts should be over 200mm.
Note that pipes cannot be repeatedly bent or stretched; otherwise the material will get harder. Do
not bend or stretch the pipe for more than 3 times at the same position.
4.3.2 Flaring Process
(1) Cut the connection pipe with a pipe cutter to prevent it from being unshaped.
(2) Remove burrs with the cut surface facing downward so that the chips do not enter the pipe.
(3) Remove the flare nuts that are connecting indoor connection pipe, hydro box connection pipe and
outdoor unit. Then use flaring tool to put the flare nut onto the pipe (as shown in Fig.10).
(4) Check if the flare part is flaring evenly and if there is any crack.
Fig.10
4.3.3 Pipe Bending
(1) Reshape the pipe by hand. Be careful not to damage the pipe.
Fig.11

CHV5 HOME Owner's Manual
11
(2) Do not bend the pipe at over 90°.
(3) If pipe is repeatedly bent or stretched, it will get hard and difficult to be bent and stretched again.
Therefore, do not bend or stretch the bend for over 3 times.
(4) In case that direct bending will open cracks to the pipe, first use sharp cutter to cut the insulating
layer, as shown in Fig.11. Bend the pipe after it is exposed. When bending is done, wrap the pipe
with insulating layer and then secure it with adhesive tape.
4.3.4 Pipe Connection of Indoor Unit
(1) Remove pipe cover and pipe plug.
(2) Direct the flare part of copper pipe to the center of screwed joint. Twist on the flare nut tightly by
hand, as in Fig.12. (Make sure indoor pipe is correctly connected. Improper location of the center
will prevent flare nut from being securely twisted. Thread of nut will get damaged if the flare nut is
twisted forcibly.)
(3) Use torque wrench to twist on the flare nut tightly until the wrench gives out a click sound. (Hold the
handle of wrench and make it at right angle to the pipe, as in Fig.13.)
(4) Use sponge to wrap the un-insulated connection pipe and joint. Then tie the sponge tightly with
plastictape.
(5) Connection pipe should be supported by a bearer rather than the unit.
(6) The bending angle of connection pipe should not be too small; otherwise the pipe might be cracked.
Please use a pipe bender to bend the pipe.
(7) When connecting indoor unit with connection pipe, do not pull the big and small joints of indoor unit
with force in case the capillary tube or other tubes be cracked and cause leakage.
Fig.12 Fig.13
4.3.5 Pipe Connection of Outdoor Unit
Twist the flare nut on the connection pipe of outdoor valves. Twisting method is the same as for indoor
pipe connection.
Below is the piping diagram of CHV-5SHH120NK, CHV-5SHH140NKand CHV-5SHH160NK.
According to customer requirement or space limit, outlet pipe can be installed from the front, right, rear or
bottom side.

CHV5 HOME Owner's Manual
12
Flare nut
Liquid pipe
Gas pipe
High pressure gas pipe
Fig.14
4.3.6 Pipe Connection of Outdoor Unit, Hydro box and Water Tank
Piping diagram of outdoor unit, hydro box and water tank:
Outdoor unit
Hydro box
Liquid pipe Gas pipe High pressure gas pipe Connect to indoor unit
Fig.15
4.3.7 Installation of Y-type Branch
(1) Y -type branch
Connect to
other branches
or indoor units
Y-type branch
Outlet 2
Outlet 1
Inlet
Field supplied pipe
Outdoor unit
Field supplied pipe
Fig.16

CHV5 HOMEOwner's Manual
13
(2) Y -type branch has several pipe sections with different dimension, which facilitates to match with
various copper pipes. Use pipe cutter to cut in the middle of the pipe section that is of proper
dimension and remove burrs as well. See Fig.16.
(3) Y -type branch must be installed vertically or horizontally.
Fig.17
(4) Branch shall be isolated by insulating material that can bear 120°or even higher temperature. The
attached foam of branch cannot be taken as insulating material.
4.3.8 Thermal Insulation and Wrapping for Pipeline
(1) For multi VRF system, every copper pipe should be labeled so as to avoid misconnection.
(2) At the branch inlet, leave at least 500mm straight pipe section.
(3) Thermal insulation for pipeline
1) To avoid condensate or water leakage on the connection pipe, the gas pipe and liquid pipe
must be wrapped with thermal insulating material and adhesive tape for insulation from the air.
2) Thermal insulating material shall be able to bear the pipe temperature. For heat pump unit,
liquid pipe should bear 70℃or above and gas pipe should bear 120℃or above. For cooling only unit,
both liquid pipe and gas pipe should bear 70℃or above.
Example: Polyethylene foam (bear 120℃or above); foaming polyethylene (bear 100℃or
above)
3) Joints of indoor unit, outdoor unit and hydro box should be wrapped with insulating material
and contact directly with the wall of indoor unit, outdoor unit and hydro box. See Fig.18.
Fig.18
4) Thermal insulating material of branches should be the same as that of the pipeline. The
attached foam of branches cannot be taken as insulating material.
5) When wrapping the tape, the later circle should cover half of the former one. Don’t wrap the
tape too tight, otherwise the insulation effect will be weakened.

CHV5 HOME Owner's Manual
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6) After wrapping the pipe, apply sealing material to completely seal the hole on the wall.
4.3.9 Support and Protection of Pipeline
(1) Support should be made for hanging connection pipe. Distance between each support cannot be
over 1m.
(2) Protection against accidental damage should be made for outdoor pipeline. When pipeline exceeds
1m, a pinch board should be added for protection.
4.4 Disassembly of Compressor Feet
In order to prevent unit from damage during transportation, 2 metal pieces are fitted to outdoor unit’s
compressor feet before unit leaves factory. See fig.19.
Fig.19
When installing the unit, metal pieces for transportation must be removed. Then fasten the binding nuts
again and wrap back soundproofing cotton.
Note: If unit runs with metal pieces fitting on, compressor will shake abnormally and unit’s
operating life will be shortened.
4.5 Vacuum Pumping, Refrigerant Adding
4.5.1 Vacuum Pumping
(1) Outdoor unit has been charged with refrigerant before delivery. Field-installed connection pipe
needs to be charged with additional quantity of refrigerant.
(2) Confirm whether outdoor liquid and gas valves are closed.
(3) Use vacuum pump to withdraw the air inside indoor unit and connection pipe from the outdoor valve,
as shown below.

CHV5 HOME Owner's Manual
15
Fig.20
4.5.2 Refrigerant Adding
(1) Refrigerant quantity of outdoor unit before delivery:
Model
CHV-5SHH120NK
CHV-5SHH140NK
CHV-5SHH160NK
Refrigerant
quantity (kg)
5.0
5.0
5.0
Note:
①The refrigerant quantity charged before delivery doesn’t include the quantity that needs to be
added to indoor units and the connection pipeline.
②Length of connection pipe is decided on site. Therefore the additional quantity of refrigerant shall
be decided on site according to the dimension and length of field-installed liquid pipe.
③Record the additional quantity of refrigerant for convenience of after-sales service.
（2）Calculation of the additional quantity of refrigerant
Additional quantity of refrigerant = additional quantity for liquid pipe + additional quantity for hydro box +
additional quantity for high pressure gas pipe
1）Calculation method of the additional quantity of refrigerant (based on liquid pipe)
Additional quantity of refrigerant for liquid pipe (kg) = ∑length of liquid pipe X additional quantity of
refrigerant per meter
Additional quantity of refrigerant for liquid pipe (kg/m)
φ28.6
φ25.4
φ22.2
φ19
φ16
φ12.7
φ9.52
φ6.35
0.680
0.520
0.350
0.250
0.170
0.110
0.054
0.022
Note:
Liquid pipe includes “liquid pipe connecting outdoor unit with indoor unit and hydro box”.
If the liquid pipe of side discharge unit is within 20m, there is no need to add refrigerant.
2）Additional quantity of refrigerant for hydro box (kg):
Additional quantity of refrigerant for hydro box = 0.3*number of hydro box
3）Additional quantity of refrigerant for high pressure gas pipe (kg):
Additional quantity of refrigerant for high pressure gas = length of high pressure gas pipe ×
additional quantity of refrigerant for high pressure gas pipe per meter
Additional quantity for high pressure gas pipe (kg/m)
φ19
φ16
φ12.7
φ9.52
0.15
0.12
0.09
0.05

CHV5 HOME Owner's Manual
16
First confirm that there is no leakage from the system. When compressor is not working, charge
additional R410a with specific quantity to the unit through the filling opening of the liquid pipe valve of
the outdoor unit. If required quantity cannot be quickly filled due to pressure increase of the pipe, then
set the unit in cooling startup status and fill refrigerant from the low pressure check valve of the
outdoor unit.
(3) Calculation example
④
③
②
①
d
c
b
a
D
C
B
A
Indoor unit
Outdoor unit
5
Gas pipe/Liquid pipe High pressure
gas pipe
E
e
Hydro box
F
Fig.21
No.
Indoor unit 1
Indoor unit 2
Indoor unit 3
Indoor unit 1
Hydro box 5
Model
Duct type
CHV-5SDS72NK
Duct type
CHV-5SDS50NK
Duct type
CHV-5SDS36NK
Duct type
CHV-5SDS25NK
HB16NK
Liquid pipe:
No.
A
B
C
D
E
Pipe size
φ9.52
φ9.52
φ9.52
φ9.52
φ6.35
Length
5m
30m
10m
5m
5m
No.
a
b
c
d
e
Pipe size
φ9.52
φ6.35
φ6.35
φ6.35
φ9.52
Length
10m
10m
10m
10m
5m
High pressure gas pipe:
No.
F
Pipe size
φ12.7
Length
10m
1）Additional quantity of refrigerant for liquid pipe (kg)
φ9.52：A+B+C+D+e=5+30+10+5+5=55m
φ6.35: E+b+c+d=5+10+10+10=35m
Note: If liquid pipe is within 20m, there is no need to add refrigerant.
Additional quantity of refrigerant for liquid pipe =（55-20）×0.054+35×0.022=2.66kg
2）Additional quantity of refrigerant for hydro box (kg)
Additional quantity of refrigerant for hydro box =0.3×1=0.3kg

CHV5 HOMEOwner's Manual
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3）Additional quantity of refrigerant for high pressure gas pipe (kg):
Φ12.7：F=10m
Additional quantity of refrigerant for high pressure gas pipe =10×0.09=0.9kg
Therefore, the minimum additional quantity of refrigerant ＝2.66 + 0.3 + 0.9＝3.86kg.
4.6 Electric Wiring
4.6.1 Notices for Wiring
☆Install units according to national wiring codes.
☆Use air conditioner specialized power supply and make sure that it is consistent with system’s rated
voltage.
☆Do not pull the power cord with force.Disconnect the power supply before cleaning and maintenance.
☆All electrical installation must be performed by qualified technicians in accordance with local laws,
regulations and this user manual.
☆Caliber of the power cord must be large enough. A damaged power cord or connection wire must be
replaced by specialized electrical cords.
☆If the supply cord is damaged, it must be replaced by manufacturer, its service agent or similarly
qualified persons in order to avoid a hazard.
Connect the unit to specialized grounding device and make sure it is securely grounded. It’s a must to
install air switch and current circuit breaker that can cut off the power of the entire system. The air switch
should include magnetic trip function and thermal trip function so that system can be protected from short
circuit and overload.
●Grounding Requirements
☆Air conditioner belongs to class I electrical appliance, so it must be securely grounded.
☆The yellow-green wire inside the unit is a ground wire. Do not cut it off or secure it with tapping screws,
otherwise it will lead to electric shock.
☆Grounding resistance must be in accord with national standard.
☆Power supply must include secure grounding terminal. Do not connect the ground wire to the following:
①Water pipe； ②
Gas pipe；
③
Drain pipe；
④Other places that are considered as insecure by
professional technicians
4.6.2 Wiring Diagram
(1) Connection of power cord and communication wire
Separate power supply of indoor unit, outdoor unit and hydro box
Fig.22 Connection of power cord and communication wire for indoor unit and outdoor unit