INVENTOR L2VO-18 User manual

Owner’s Manual
Thank you for choosing INVENTOR air
conditioning system. For correct use of
this unit, please read this manual
carefully and keep it for future
reference.
L2VO-18
L2VO-24
English
Outdoor Unit
66129918212

Content
Operation Notices
Precautions..........................................................................................................1
Parts Name..........................................................................................................6
Installation Notice
Installation dimension diagram.............................................................................7
Tools for installation..............................................................................................8
Selection of installation location
...........................................................................8
Requirements for electric connection...................................................................9
Installation
Installation of outdoor unit..................................................................................10
Vacuum pumping...............................................................................................13
Leakage detection..............................................................................................13
Check after installation.......................................................................................14
Test and operation
Test operation....................................................................................................14
Attachment
Configuration of connection pipe .......................................................................15
Pipe expanding method......................................................................................17
R410A(R32/125: 50/50): 2087.5
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 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 un-
controlled waste disposal, recycle it responsibly to promote the sustainable reuse of mate-
rial 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 envi-
ronmental safe recycling.

1
Precautions
WARNING
Do not connect air conditioner to multi-purpose socket.
This appliance can be used by children aged from 8
Operation and Maintenance
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.
Do not spray water on indoor unit. It may cause electric
shock or malfunction.
Otherwise, it may cause fire hazard.
Children shall not play with the appliance.
Cleaning and user maintenance shall not be made by
children without supervision.
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.
Do not wash the air conditioner with water to avoid
electric shock.
After removing the filter, do not touch fins to avoid injury.
Do not use fire or hair dryer to dry the filter to avoid
deformation or fire hazard.
Do disconnect power supply when cleaning air
conditioner. Otherwise, it may cause electric shock.
.

Do not block air outlet or air inlet. It may cause
malfunction.
remote controller may be broken.
●Power cord is overheating or damaged.
●There’s abnormal sound during operation.
●Circuit break trips off frequently.
●Air conditioner gives off burning smell.
●Indoor unit is leaking.
contact the dealer or qualified professionals for service.
When turning on or turning off the unit by emergency
operation switch, please press this switch with an insulating
object other than metal.
outlet. It may cause personal injury or damage.
2
Precautions
WARNING
conditioner and disconnect power immediately, and then
If the air conditioner operates under abnormal conditions,
it may cause malfunction, electric shock or fire hazard.
Do not spill water on the remote controller, otherwise the
electric shock or damage. Please contact dealer when
you need to repair air conditioner.
Do not repair air conditioner by yourself. It may cause
objects. It may cause damage or personal injury.
Do not step on top panel of outdoor unit, or put heavy
When below phenomenon occurs, please turn off air
Do not extend fingers or objects into air inlet or air
Maintenance must be performed by qualified
professionals. Otherwise, it may cause personal injury
or damage.

Do install the circuit break. If not, it may cause malfunction.
of at least 3mm in all poles should be connected in fixed
wiring.
magnet buckle and heating buckle function, it can protect
the circuit-short and overload.
power supply circuit and circuit break.
3
Precautions
WARNING
note the following table.Air switch should be included
Make sure the power supply matches with the
requirement of air conditioner.Unstable power supply or
incorrect wiring or malfunction. Please install proper power
supply cables before using the air conditioner.
An all-pole disconnection switch having a contact separation
Must follow the electric safety regulations when installing
the unit.
grounding wire of power socket.
Properly connect the live wire, neutral wire and
any work related to electricity and safety.
Be sure to cut off the power supply before proceeding
Including an circuit break with suitable capacity, please
Air Conditioner should be properly grounded. Incorrect
Don't use unqualified power cord.
grounding may cause electric shock.
According to the local safety regulations, use qualified
Installation must be performed by qualified professionals.
Otherwise, it may cause personal injury or damage.
Attachment

Installation must be performed in accordance with the
persons in order to avoid a hazard.
must be properly grounding with specialized grounding
device by a professional. Please make sure it is always
grounded effectively, otherwise it may cause electric shock.
The appliance must be positioned so that the plug is
accessible.
If the length of power connection wire is insufficient, please
contact the supplier for a new one. Avoid extending the
wire by yourself.
All wires of indoor unit and outdoor unit should be
connected by a professional.
national wiring regulations.
requirement of NEC and CEC by authorized personnel
only.
4
Precautions
WARNING
wire, which can't be used for other purposes.
The grounding resistance should comply with national
electric safety regulations.
The air conditioner is the first class electric appliance. It
keep the interconnection cable away from the copper
tube.
The temperature of refrigerant circuit will be high, please
the manufacturer, its service agent or similarly qualified
If the supply cord is damaged, it must be replaced by
The yellow-green wire in air conditioner is grounding
The appliance shall be installed in accordance with
Do not put through the power before finishing installation.

The indoor unit should be installed close to the wall.
reachable after finishing installation.
far away from animals or plants.If it is unavoidable,
please add the fence for safety purpose.
5
Precautions
WARNING
place, only the qualified person can perform the work.
Otherwise, it may cause personal injury or damage.
If you need to relocate the air conditioner to another
must be installed in the line.
For the air conditioner without plug, an circuit break
Select a location which is out of reach for children and
For the air conditioner with plug, the plug should be
Working temperature range

Precautions
Parts Name
Notice:
Actual product may be different from above graphics, please refer to actual
products.
Outdoor Unit
6
Working temperature range
air inlet
handle
air outlet
Indoor side DB/WB(°C) Outdoor side DB/WB(°C)
Maximum cooling 32/23 43/26
Maximum heating 27/- 24/18
●
The operating temperature range (outdoor temperature) for cooling is -15℃~43℃;
Heating temperature range for the model without electric heating belt for chassis
is -15℃~24℃；Heating temperature range for the model with electric heating belt
for chassis is -20℃~24℃.

7
Installation dimension diagram
At least 50cm
At least 50cm
At least
30cm
Space to the obstruction
Space to the
obstruction
Space to the
obstruction
Space to the obstruction
Space to the wall
At least 200cm
At least 30cm

8
Selection of installation location
Basic requirement
Outdoor unit
Installing the unit in the following places maycause malfunction. If it is un-
avoidable, please consult the localdealer:
1.The place with strong heat sources, vapors, flammableor explosive gas, or
volatile objects spread in the air.
2.The place with high-frequency devices (such as welding machine, medical
equipment).
3. The place near coast area.
4.
The place with oil or fumes in the air.
5. The place with sulfureted gas.
6. Other places with special circumstances.
7. The appliance shall not be installed in the laundry.
will not affect neighborhood.
2. The location should be well ventilated and dry, in which the outdoor unit
Tools for installation
1 Level meter 2 Screw driver 3 Impact drill
4 Drill head 5 Pipe expander 6 Torque wrench
7 Open-end wrench 8 Pipe cutter 9 Leakage detector
10 Vacuum pump 11 Pressure meter 12 Universal meter
13 Inner hexagon spanner 14 Measuring tape
Note: ● Please contact the local agent for installation.
won't be exposed directly to sunlight or strong wind.
3. The location should be able to withstand the weight of outdoor unit.
4. Make sure that the installation follows the requirement of installation
dimension diagram.
5. Select a location which is out of reach for children and far away from animals
or plants.If it is unavoidable, please add the fence for safety purpose.

9
Requirements for electric connection
Safety precaution
Grounding requirement
1. Must follow the electric safety regulations when installing the unit.
air switch.
3. Make sure the power supply matches with the requirement of air conditioner.
Unstable power supply or incorrect wiring or malfunction. Please install proper
power supply cables before using the air conditioner.
4. Properly connect the live wire, neutral wire and grounding wire of power socket.
5. Be sure to cut off the power supply before proceeding any work related to
electricity and safety.
7. If the supply cord is damaged, it must be replaced by the manufacturer, its
8. The temperature of refrigerant circuit will be high, please keep the interconnec-
tion cable away from the copper tube.
9. The appliance shall be installed in accordance with national wiring regulations.
grounding with specialized grounding device by a professional. Please make
sure it is always grounded effectively, otherwise it may cause electric shock.
2. The yellow-green wire in air conditioner is grounding wire, which can't be used
for other purposes.
3. The grounding resistance should comply with national electric safety regulations.
4. The appliance must be positioned so that the plug is accessible.
5. An all-pole disconnection switch having a contact separation of at least 3mm in
all poles should be connected in fixed wiring.
6. Including an circuit break with suitable capacity, please note the following table.
Air switch should be included magnet buckle and heating buckle function, it can
protect the circuit-short and overload. (Caution: please do not use the fuse only
for protect the circuit)
Air-conditioner Circuit break capacity
24K
18K
25A
16A

10
Installation of outdoor unit
Step one: x the support of outdoor unit
(select it according to the actual installation situation)
1. Select installation location according to the house structure.
2. Fix the support of outdoor unit on the selected location with expansion screws.
at least 3cm above the floor
Note:
● Take sufcient protective measures when
installing the outdoor unit.
● Make sure the support can withstand at least
four times of the unit weight.
● The outdoor unit should be installed at least
3cm above the oor in order to install drain
joint.
● For the unit with cooling capacity of 2300W
~5000W, 6 expansion screws are needed;
for the unit with cooling capacity of 6000W
~8000W, 8 expansion screws are needed;
for the unit with cooling capacity of 10000W
~16000W, 10 expansion screws are needed.
Step two: install drain joint
(Only for cooling and heating
unit)
1. Connect the outdoor drain joint into
the hole on the chassis, as shown in
the picture below.
2. Connect the drain hose into the drain
vent.
chassis
outdoor drain joint
Drain hose
drain vent
Step three: x outdoor unit
1. Place the outdoor unit on the
support.
2. Fix the foot holes of outdoor unit
with bolts.
foot holes
foot holes

11
Installation of outdoor unit
Step four: connect indoor and outdoor pipes
1. Remove the screw on the right han-
dle of outdoor unit and then remove
the handle.
2. Remove the screw cap of valve and
aim the pipe joint at the bellmouth of
pipe.
3. Pretightening the union nut with
hand.
4. Tighten the union nut with torque
wrench by referring to the sheet
below.
screw
gas pipe
liquid pipe
liquid
valve
gas valve
union nut
pipe joint
Hex nut diameter Tightening torque
(N.m)
Φ 6
Φ 9.52
Φ 12
Φ 16
Φ 19
30~40
45~55
60~65
70~75
15~20
1. Remove the wire clip; connect the po
wer connection wire and signal control
wire (only for cooling and heating unit)
to the wiring terminal according to the
handle
handle
Indoor unit connection
2 3 L
L
N
NN(1)
POWER
blue blue
black brown brown
yellow-
green
yellow-
green

12
Installation of outdoor unit
2. Fix the power connection wire and signal control wire with wire clip (only for
cooling and heating unit).
Note:
● Never cut the power connection wire to prolong or shorten the distance.
Step six: neaten the pipes
1. The pipes should be placed along the wall,
bent reasonably and hidden possibly. Min.
semidiameter of bending the pipe is 10cm.
2. If the outdoor unit is higher than the wall
hole, you must set a U-shaped curve in the
pipe before pipe goes into the room, in
order to prevent rain from getting into the
room.
U-shaped curve
wall
drain hose
Outdoor Condensate Drainage
During heating operation, the condensate and defrosting
water should be drained out reliably through the drain hose.
Install the outdoor drain connector in a Φ25 hole on
the base plate and attach the drain hose to the connector
so that the waste water formed in the outdoor unit can be
drained out. The hole diameter 25 must be plugged.
(The figures in this manual may be different with the material
objects, please refer to the material objects for reference)
The 18K QD、24K QE UNIT drainage hole
consists of two Φ25 and two kidney holes (see the fig.1). The
drain plug consists of one Φ25 and two kidney plugs.
Whether to plug other holes will be determined by the dealers
to actual conditions.
18K QD UNIT:
24K QE UNIT:
Didney holes Drain - water hole
Bottom frame
Didney holes Drain - water hole
Bottom frame
Fig.1
Didney holes
Didney holes Didney holes
Drain plug
Hose (available commercially,
inner dia. 16mm)
Drain connecter

13
Vacuum pumping
Leakage detection
1. Remove the valve caps on
the liquid valve and gas
valve and the nut of refri-
gerant charging vent.
2. Connect the charging hose
of piezometer to the refri-
gerant charging vent of gas
valve and then connect the
other charging hose to the
vacuum pump.
3. Open the piezometer com-
pletely and operate for
10-15min to check if the
pressure of piezometer re-
mains in -0.1MPa.
4. Close the vacuum pump
and maintain this status for
1-2min to check if the pres-
sure of piezometer remains
in -0.1MPa. If the pressure decreases, there may be leakage.
5. Remove the piezometer, open the valve core of liquid valve and gas valve
completely with inner hexagon spanner.
6. Tighten the screw caps of valves and refrigerant charging vent.
7. Reinstall the handle.
Use vacuum pump
liquid valve
gas valve
refrigerant charging
vent
nut of refrigerant
charging vent
vacuum pump
piezometer
valve cap
Lo Hi
inner hexagon
spanner
open
close
1. With leakage detector:
Check if there is leakage with leakage detector.
2. With soap water:
If leakage detector is not available, please use soap water for leakage detection.
Apply soap water at the suspected position and keep the soap water for more
than 3min. If there are air bubbles coming out of this position, there's a leakage.

14
Check after installation
Test operation
● Check according to the following requirement after nishing installation.
Items to be checked Possible malfunction
Has the unit been installed rmly? The unit may drop, shake or emit noise.
Have you done the refrigerant leakage
test? It may cause insufcient cooling (heating) capacity.
Is heat insulation of pipeline sufcient? It may cause condensation and water
dripping.
Is water drained well? It may cause condensation and water
dripping.
Is the voltage of power supply accord-
ing to the voltage marked on the
nameplate? It may cause malfunction or damaging
the parts.
Is electric wiring and pipeline installed
correctly? It may cause malfunction or damaging the parts.
Is the unit grounded securely? It may cause electric leakage.
Does the power cord follow the speci-
cation? It may cause malfunction or damaging
the parts.
Is there any obstruction in the air inlet
and outlet? It may cause insufcient cooling (heating) capacity.
The dust and sundries caused during
installation are removed? It may cause malfunction or damaging the parts.
The gas valve and liquid valve of
connection pipe are open completely? It may cause insufcient cooling (heating) capacity.
1. Preparation of test operation
● The client approves the air conditioner.
● Specify the important notes for air conditioner to the client.
2. Method of test operation
● Put through the power, press ON/OFF button on the remote controller to start
operation.
● Press MODE button to select AUTO, COOL, DRY, FAN and HEAT to check
whether the operation is normal or not.
● If the ambient temperature is lower than 16℃( ) , the air conditioner can’t
start cooling.
61℉

15
1. Standard length of connection pipe
● 5m, 7.5m, 8m.
4. The additional refrigerant oil and refrigerant charging required after prolonging
connection pipe
● After the length of connection pipe is prolonged for 10m at the basis of
standard length, you should add 5ml of refrigerant oil for each additional 5m
of connection pipe.
●The calculation method of additional refrigerant charging amount (on the basis
of liquid pipe):
● Basing on the length of standard pipe, add refrigerant according to the
requirement as shown in the table. The additional refrigerant charging amount
per meter is different according to the diameter of liquid pipe. See the
following sheet.
Additional refrigerant charging amount =prolonged length of liquid pipe ×
additional refrigerant charging amount per meter
Cooling
capacity Cooling capacity
5000Btu/h
(1465W) 24000Btu/h (7032W)
7000Btu/h
(2051W) 28000Btu/h (8204W)
9000Btu/h
(2637W) 36000Btu/h (10548W)
12000Btu/h
(3516W) 42000Btu/h (12306W)
18000Btu/h
(5274W) 48000Btu/h (14064W)
Max height
difference Max height difference
Max length
of connec-
tion pipe
Max length
of connec-
tion pipe
15 255 10
15 305 10
15 305 20
20 3010 20
25 3010 20
2.Min. length of connection pipe is 3m.
3.Max. length of connection pipe and max. high difference.
Configuration of connection pipe

16
Additional refrigerant charging amount for R22, R407C, R410A and R134a
Diameter of connection pipe
Liquid pipe(mm) Gas pipe(mm)
Φ6
Φ6 or Φ9.52
Φ9.52 or Φ12
Φ12
Φ16
Φ19
Φ22.2
Φ16 or Φ19
Φ19 or Φ22.2
Φ25.4 or Φ31.8
_
_
Cooling only(g/m) Cooling and heating(g/m)
15
15
30
60
250 250
350350
120
120
50
20
Outdoor unit throttle
Conguration of connection pipe

17
Pipe expanding method
Note:
Improper pipe expanding is the main cause of refrigerant leakage. Please expand
the pipe according to the following steps:
A: Cut the pipe
● Conrm the pipe length according to
the distance of indoor unit and
outdoor unit.
● Cut the required pipe with pipe cutter.
pipe
pipe cutter
leaning uneven burr
B: Remove the burrs
● Remove the burrs with shaper and
prevent the burrs from getting into
the pipe.
downwards
pipe
shaper
C: Put on suitable insulating pipe
D: Put on the union nut
● Remove the union nut on the indoor
connection pipe and outdoor valve;
install the union nut on the pipe.
union pipe
pipe
E: Expand the port
● Expand the port with expander.
Note:
● "A" is different according to the
diameter, please refer to the sheet
below:
expander
hard
mold
pipe
F: Inspection
● Check the quality of expanding port.
If there is any blemish, expand the
port again according to the steps
above.
the length is equal
improper expanding
leaning damaged
surface crack uneven thickness
smooth surface
Outer diameter
(mm) A(mm)
Max Min
Φ6 - 6.35(1/4")
Φ9.52(3/8")
Φ12-12.7(1/2")
Φ15.8-16(5/8")
1.3 0.7
1.6 1.0
1.8 1.0
2.4 2.2