Baxi JSGNW 25 User manual

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BAXI ASTRA: DC inverter air conditioner with heat pump mode.
lnstallation and Support Manual
JSGNW 25/35/50/70
LSGT 25-S/35-S/50-S/70-S

TABLE OF CONTENTS
1. SAFETY PRECAUTIONS........................................................................................... 3
1.1. WARNINGS FOR INSTALLERS......................................................................... 3
1.2. SPECIFIC WARNINGS FOR R32 GAS USE…………………………………………..5
1.3. WEEE WARNINGS ............................................................................................. 6
2. ACCESSORIES INCLUDED ......................................................................................... 7
2.1. INDOOR UNIT..................................................................................................... 7
2.2. OUTDOOR UNIT................................................................................................. 7
3. TECHNICAL DATA ........................................................................................................ 8
4. INSTALLATION.............................................................................................................. 9
4.1. CHOOSING THE INSTALLATION POSITION................................................... 9
4.2. INSTALLING THE INDOOR UNIT.................................................................... 11
4.3. INSTALLING THE OUTDOOR UNIT................................................................ 13
5. REFRIGERANT GAS PIPING..................................................................................... 15
5.1. CONNECTING THE PIPING............................................................................. 15
5.2. LEAK TEST........................................................................................................ 16
5.3. CREATING THE VACUUM............................................................................... 16
5.4. REFRIGERANT GAS CHARGE ....................................................................... 17
6. WIRING ........................................................................................................................ 17
6.1. WIRING THE INDOOR UNIT............................................................................ 17
6.2. WIRING THE OUTDOOR UNIT........................................................................ 18
7. OPERATING TEST...................................................................................................... 19
7.1. TEST PROCEDURES ....................................................................................... 19
7.2. EVALUATING PERFORMANCE ...................................................................... 19
8. ERROR CODES .......................................................................................................... 20

3
The appliance can be used by children aged 8 or over and by people with reduced
physical, sensory or mental faculties, orwho do not have the required experience
or knowledge, provided they are supervised or have received instructions on
using the appliance safelyandunderstanding itsintrinsic hazards. Children must
not play with the appliance. The cleaning and maintenance operations reserved to
the user must not be performed by unsupervised children.
1.1. WARNINGS FOR INSTALLERS
- The air conditioner may only be installed, plumbed in and wired by persons who meet the
technical and professional requirements to install and maintain such systems.
- This air conditioner must be installed in accordance with national plant engineering
regulations. Pay particular attention to the aspects concerning safety and the proper
connection of electrical cables. Errors while connecting cables may lead to fires.
- Connect the air conditioner to the mains or to a power socket with a suitable voltage and
frequency. A power supply with an incorrect voltage and frequency may result in damage to
the unit with a consequent fire risk. The voltage must be stable and without excessive
fluctuations.
- Install the condensation drainage piping so as to ensure that the condensation is removed
correctly. Also adopt the most appropriate solutions to prevent heat loss and the resulting
formation of condensation. An incorrect piping configuration may lead to water leakage and
wet furniture and objects in the indoor environment.
- The air conditioner must be earthed. Incomplete or poorly set-up earthing may cause electric
shocks. Do not connect the earthing cable to other pipes, water pipes, lightning rods or the
telephone earthing wire.
- Install an omnipolar switch (with a minimum contact distance of at least 3 mm on all poles)
on the power supply circuit to prevent possible discharge to ground and short circuits.
- The omnipolar switch and any socket must be installed in an easily accessible location.
- Do not remove the power cable while the unit is running or with wet hands. Doing so risks
electric shocks and fires.
- Use cables that are intact and whose cross-section is appropriate for the load for the power
supply.
- Do not make joints on the power cable. Use a longer cable if necessary. Joints can cause
overheating or fire.
- In the event that the power cable is damaged, it must be replaced. Use a type of cable
featured in the manual only.
- Install a noise filter if the power supply emits too much noise.
- Do not leave any cables in direct contact with the refrigerant piping which could reach
excessive temperatures.
- Do not leave any cables in direct contact with moving parts, such as fans. Make sure the
communication cables between the units are connected to the correct terminals.
- Only replace fuses with ones identical to the original.
- lf the filter is very dirty, this will significantly reduce the cooling capacity of the appliance.
- Tighten the nut to the torque indicated in the device manual. Overtightening can lead to
leakage of refrigerant.
1. SAFETY PRECAUTIONS

4
- Do not install the indoor unit outside. Doing so may result in damage and electrical losses.
- During installation of the indoor unit(s), consider the distribution of air in each indoor unit in
the room in order to select the most suitable position and ensure a temperature as uniform
as possible within the environment.
- Do not install the indoor unit in a location directly exposed to sunlight.
- Do not install the unit near liquids and highly flammable gases. Install the unit in locations
with the minimum content of dust, smoke, air humidity and corrosive agents.
- Place the indoor unit at a distance of at least 1 meter from televisions, radios and general
electrical equipment whose electromagnetic waves may directly influence the electrical box
or remote control.
- Pay particular attention to the installation warnings and conditions of use if the indoor units
are located in hospitals, near medical equipment or generally in places with significant
electromagnetic waves.
- lf the indoor units are installed in areas exposed to high concentrations of magnetic
interference, you must use shielded twisted cables tor communication links between units.
- Do not install in laundries.
- This type of indoor unit does not use an electric heater. You cannot install an electric heater
or an electric stove at the installation site.
- The installation height of the indoor unit must be at least 2.3 meters. The filter must also be
easily accessible. Make sure there is enough space to maintenance. Install the indoor unit
on a solid surface that can support the weight of the air conditioner. Make sure that the
support is securely installed and the unit is stable even after running tor an extended period.
lf not properly secured, the unit may fall and cause damage or injury to objects and persons.
- Do not place objects of any kind inside the indoor unit. Remember to check that there are no
foreign objects inside the unit before installation and testing.
- For the outdoor unit, choose an installation location where the noise and the air jet do not
disturb neighbors.
- Avoid placing the outdoor unit in a location where it causes an obstacle to pedestrians.
- Position the outdoor unit in line with local architectural rules.
- Respect the dimensions given in the manual, the lengths of the refrigerant lines and the
height difference between units.
- Ensure that the appliances are not accessible by disabled persons or children. Do not block
the entrances to the air inlets and outlets. Doing so will significantly reduce the heating and
cooling capacity.
- Do not place objects on the outdoor unit or climb over it. Perform a test after carrying out
wiring.
- Wiring diagrams are subject to ongoing updates. It is therefore compulsory to refer to those
on the machine itself.
- Before turning on the air conditioner, make sure that the electrical cables, condensation
drainage pipes and refrigerant connections are properly configured and installed. This
eliminates the risk of water or refrigerant gas leaks or electric shocks.
- Periodically check the conditions of installation of the unit. Have the system checked by
qualitied personnel.
- After switching on the air conditioner, do not switch it off tor at least 5 minutes. This prevents
oil from returning to the compressor.
- Do not disassemble or repair the unit while it is running.

5
1.2. SPECIFIC WARNINGS FOR R32 GAS USE
•GENERAL R32 WARNINGS
- Do not mix other refrigerants or products that are not the specified refrigerant (R32)
- The maximum amount of R32 refrigerant allowed per room is 1.7 kg.
- If there is a loss of refrigerant gas, it is necessary to immediately provide complete ventilation
of the environment. If the R32 refrigerant comes in contact with a flame it could cause the
presence of toxic gas in the environment.
- All equipment required for installation and maintenance (vacuum pump, pressure gauge, load hose,
gas leak detector, etc.) must be certified for use with R32 refrigerant gas
- Do not use the same instrumentation (vacuum pump, pressure gauge, load hose, gas leak
detector, etc.) with different types of refrigerants. The use of different refrigerant gases can cause
damage to the instrument itself or to the air conditioner.
- Comply with the instructions contained in this manual regarding the installation, maintenance and
equipment required for R32 refrigerant gas.
- Respect the current regulations for the use of R32 refrigerant gas.
- Check the status of the existing refrigerant pipes carefully. The R32 is an high pressure gas (similar
to R410A) and therefore the use of old and/or worn pipes could expose to the risk of explosion.
•R32 required equipment
EQUIPMENT
To be used exclusively with R32 gas (not use
these instruments if they have been already
used with R22 or R407C)
Gauge manifold, charging hose, refrigerant
recovery equipment, refrigerant cylinder,
refrigerant cylinder charging port, gas leak
detector, vacuum pump (if it is not the type with
the reverse-flow check valve).
Equipment used in the past with R22 and R407C
gas that could also be used with R32
Vacuum pump with reverse-flow check valve,
bender, torque wrench, pipe cutter, welder and
nitrogen cylinder, refrigerant charging meter,
vacuum gauze.
•R32 PIPES
The regulation for refrigerant gas pipes is EN12735. According to this standard, the
pipes required must be copper only, have a thickness of at least 0.8mm and of the
type C1220T-O (only the pipes with dimension ¾ "require the use of pipes of the
type 1 / 2H). In essence, therefore, the restrictions on the pipes are absolutely the
same as those of R410A, if a pipe meets the specific regulations for R410A, it is
also suitable for R32. Therefore also the procedure of replacing old machines in
R22 or R407 is absolutely identical between R410 and R32.
Please refer to the table below for the characteristics of the pipes.
Dimension B
Dimension A

6
PIPES
Dimension
(mm)
Dimension
(inch)
Radial thickness
(mm)
Type
Dimens. A
flare (mm)
Dimens. B
flare nuts type
2 (mm)
Ø6.35
1/4”
0.8
Pipes type O
9.1
17.0
Ø9.52
3/8”
0.8
Pipes type O
13.2
22.0
Ø12.7
1/2”
0.8
Pipes type O
16.6
26.0
Ø15.88
5/8”
1.0
Pipes type O
19.7
29.0
Ø19.05
3/4”
1.0
Pipes type 1/2H or H
24.0
36.0
The choice of the most suitable copper pipes must take into account the higher operating pressure of
the R32 gas compared to the old R22 and R407C refrigerants. Please refer to the table below.
GAS TYPE
MAX OPERATING PRESSURE
R32
4.15 MPa
R407C, R22
3.40 MPa
•MINIMUM ROOM DIMENSIONS FOR R32 INSTALLATION
The area of the room in which R32 refrigerant air conditioner is installed cannot be less than the
minimum area specified in the table below, to avoid potential safety problems due to out-of-limit of
refrigerant concentration inside the room caused by leakage of refrigerant from refrigeration system of
the indoor unit.
The height of installation of wall type air conditioners is 1.8 m. That one of the floor/ceiling type is 0.6
m, and finally cassettes one is 2.2 m.
1.3. WEEE WARNINGS
Do not dispose of electronic equipment as household waste. Use proper disposal
facilities. Contact your local council tor more information about the collection
systems available. lf electrical appliances are disposed of in landfills, hazardous
substances can leak out, contaminate water and reach the food chain, affecting
our health and wellbeing. When old appliances are replaced by new ones, the
retailer is legally obliged to take back your old appliance tor disposal free of
charge.

7
2.1. INDOOR UNIT
N.
NAME
UNIT
QUANTITY
1.
Indoor unit
Kit
1
2.
User manual
Items
1
3.
Remote controller
Items
1
4.
Batteries
Items
2
5.
Certificates
Items
1
2.2. OUTDOOR UNIT
N.
NAME
UNIT
QUANTITY
1.
Outdoor unit
Kit
1
2.
User manual
Items
1
3.
Drainage connector
Items
1
4.
Certificates
Items
1
5.
Brass nuts
Items
4
NOTE
AIIthedescriptions andfigures showninthis manual are approximate and may differ slightly from
the actual appliance purchased or its conditions of use. lf there are any differences, always refer
to the latter conditions.
2. ACCESSORIES INCLUDED

7
SIZE
9000
12000
18000
24000
Type
DC Inverter
DC Inverter
DC Inverter
DC Inverter
Rated cooling power (min-max) (kW)
2.55
(1.00-3.30)
3.60
(1.20-3.80)
5.30
(1.90-5.50)
7.03
(2.90-7.30)
Rated cooling power (min-max) (kcal/h)
8.700
(3.400-11.300)
12.300
(4.100-13.000)
18.100
(6.500-18.800)
24.000
(9.900-24.900)
Rated heating capacity (min-max) (kW)
2.65
(1.10-3.30)
3.70
(1.00-3.80)
5.40
(1.40-5.60)
7.05
(2.10-8.00)
Rated heating capacity (min-max) (kcal/h)
9.000
(3.700-11.300)
12.600
(3.400-13.000)
18.400
(4.800-19.100)
24.000
(7.200-27.300)
SEER
6.50
6.18
6.55
6.36
SCOP
4.20
4.22
4.07
4.32
Energy class in cooling/heating mode
A++ / A+
A++ / A+
A++ / A+
A++ / A+
Rated power consumpt. in cooling mode (kW)
0.78
(0.10-1.44)
1.08
(0.10-1.60)
1.60
(0.21-1.73)
2.12
(0.37-2.90)
Rated current consumpt. in cooling mode (A)
3.40
(0.60-6.40)
4.90
(0.60-7.10)
7.36
(0.90-7.70)
10.30
(1.60-12.80)
Rated power consumpt. in heating mode (kW)
0.66
(0.20-1.40)
0.94
(0.20-1.35)
1.39
(0.31-2.00)
1.81
(0.44-2.60)
Rated current consumpt. in heating mode (A)
3.20
(0.90-6.20)
4.50
(0.90-6.00)
6.95
(1.40-8.80)
10.50
(1.90-11.50)
Maximum power consumption (kW)
1.50
1.90
2.90
3.70
Maximum current consumption (A)
8.00
9.50
12.00
16.00
Power supply voltage (V)
220-240
220-240
220-240
220-240
Power supply frequency
50
50
50
50
Diameter of the liquid conduits (inch/mm)
1/4” / 6.35
1/4” / 6.35
1/4” / 6.35
1/4” / 6.35
Diameter of the gas conduits (inch/mm)
3/8” / 9.52
3/8” / 9.52
1/2” / 12.70
5/8” / 15.88
Wiring between the two units (mm2)
4 x 1.5 + T
4 x 1.5 + T
4 x 2.5 + T
4 x 2.5 + T
INDOOR UNIT
JSGNW25
JSGNW35
JSGNW50
JSGNW70
Dimensions of the indoor unit
width/height/depth (mm)
792/292/201
792/292/201
940/316/224
1132/330/232
Weight of the indoor unit (kg)
8
8
12
15
Air flow rate (m3/h)
600
600
900
1150
Sound pressure of the indoor unit dB(A)
42
42
46
47
Sound power dB(A)
53
52
58
60
OUTDOOR UNIT
LSGT25-S
LSGT35-S
LSGT50-S
LSGT70-S
Power supply (mm2)
U.E. (2x1,5+T)
U.E. (2x1,5+T)
U.E. (2x2,5+T)
U.E. (2x2,5+T)
Dimensions of the outdoor unit
width/height/depth (mm)
720/540/260
720/540/260
802/535/298
900/681/343
Weight of the outdoor unit (kg)
27
27
35
45
Air flow rate (m3/h)
1800
1800
2700
3200
Sound pressure of the outdoor unit dB(A)
50
50
53
53
Sound power dB(A)
60
58
62
62
Refrigerant type
R32
Related gas GWP
675
Gas quantity (kg)
0.58
0.68
1.28
1.44
tCO2 equivalent
391.5
459.0
864.0
972.0
Maximum distance of the refrigerant
connections with precharge (m)
7
7
7
7
Additional charge (g/m)
15
15
25
30
Maximum discharge pressure (MPa)
4.3
4.3
4.3
4.3
Maximum intake pressure (MPa)
1.2
1.2
1.2
1.2
OPERATING LIMITS
INDOOR UNIT
OUTDOOR UNIT
COOLING
MAX
52°C
MIN
15 °C
16°C
HEATING
MAX
30 °C
30°C
MIN
-15°C
3. TECHNICAL DATA

9
4.1. CHOOSING THE INSTALLATION POSITION
UNIT
MODEL
DIMENSIONS(mm)
INDOOR UNIT (WxHxD)
JSGNW25
792*292*201
OUTDOOR UNIT (W1(W2)xHxD)
LSGT25-S
720(780)*540*260
INDOOR UNIT (WxHxD)
JSGNW35
792*292*201
OUTDOOR UNIT (W1(W2)xHxD)
LSGT35-S
720(780)*540*260
INDOOR UNIT (WxHxD)
JSGNW50
940*316*224
OUTDOOR UNIT (W1(W2)xHxD)
LSGT50-S
802(860)*535*298
INDOOR UNIT (WxHxD)
JSGNW70
1132*330*232
OUTDOOR UNIT (W1(W2)xHxD)
LSGT70-S
900(950)*681*343
INDOOR UNIT
4. INSTALLATION
Space from
the wall
Space from
the wall
Space from the ceiling
Space from the floor

10
• Consider the distribution of air from the indoor unit to the home and select a suitable position in
order to achieve a uniform air temperature in the place of installation.
• Make sure that there are no sources of heat and/or steam nearby.
• Maintain good air circulation.
• Consider adopting measures to reduce noise.
• Do not install the unit near doors and/or windows.
• Make sure that the indoor unit is installed at a distance of not less than 15 cm from theroof and
side walls so as to ensure the air intake from the environment.
• Install the indoor unit at least 2.3 meters from the floor.
OUTDOOR UNIT
• lf you decide toprotect the outdoor unit from rain and
direct sunlight with a special canopy, be careful not to
hinder heat radiation by the compressor.
• Do not grow plants or raise animals in the vicinity of
the compressor because the heat could affect normal
growth.
• Make sure there isasuitable distance from ceilings,
walls, furniture andother obstacles.
• Secure the unit away from heat sources and/or
flammable gases.
• The installation base and support frame must be
adequate and secure. The machine must normally be
installed on a flat surface.
LENGTH OF REFRIGERANT CONNECTIONS
Before installing the equipment, consider the maximum length of the refrigerant connections:
LSGT25-S
LSGT35-S
LSGT50-S
LSGT70-S
Minimum distance Outdoor/indoor units (m)
5
5
5
5
Maximum distance Outdoor/indoor units (m)
20
20
25
25
Maximum height difference (m)
10
10
15
15
Max distance with precharge (m)
7
7
7
7
Additional charge (g/m)
15
15
25
30
> than 10 cm
> than 60 cm
> than 30 cm
> than 200 cm

11
4.2. INSTALLING THE INDOOR UNIT
•
First drill the wall and make sure it is solid and suitable to support 20 kg.
• Using suitable crosshead screwdrivers, secure the support bracket to the wall.
• Use a spirit level to make sure that the support stays horizontal and is perpendicular to the
vertical direction. lfnot there may be water leakage from the indoor unit when the air
conditioner is operating in cooling mode.
• It is possible to realize the pipe connection on Baxi Astra Indoor Unit by simply removing the
below cover panel in the inferior part of the unit.
INSTALLING THE CONNECTIONS BETWEEN THE TWO UNITS
• Drill a hole 70 mm in diameter on the left side (rear view) or right side (front view) with a
slight downward slope.
• Use adhesive tape to hold the indoor unit fitting in place. Then wrap the connection with
electrical tape to preventcondensation.
• Secure the refrigeration pipes, the electrical cables and the drainage pipe together using
plastic cable ties.
• Set out the pipes and cables as shown in thefigure:
Outdoor
Ring
Plaster
Ø70 hole
Pipe connection
Indoor
Drainage pipe
Connection pipe
Cable
Scotch tape

12
• Hang the indoor unit on the support using the upper tabs. Make sure that the indoor unit is in
themiddle.
• Position and push the indoor unit onto the mounting plate until the hooks attach firmly into the
guides and you hear them "click" into place.
INSTALLATION WITH SIDE CONNECTIONS
• It is also possible to install the indoor units using the
existing side pre- shearing.
• Please note that the wiring, the drainage, and the
refrigerant connections are fully suited for connection on
either side of the unit.
• Even when installing with feedthrough connections, wrap
up all the connections to prevent condensation problems.
DRAINAGE PIPE
• Bear in mind that water drainage takes place due to gravity.
• Connect the drainage pipe to the thermally isolated plastic pipe from the right side of the indoor
unit (rear view).
• Make sure the drainage pipe comes out from the indoor unit with a negative slope (downwards).
The highest point of the outlet connections must not exceed the position of the tank.
NOTE: The drainage pipe can be connected to either
connector 1 or 2. lf it is necessary to change the side of the
drainage pipe, remove the rubber cap on the connector and
secure it on the unused side
using a screwdriver.
Connection pipe
Drainage pipe
Connection pipe
Wall
Support
Piping
Electrical cable
Drainage pipe
Mounting bracket
Connector 1
Connector 2
Rubber
cap
Screwdriver

13
CHECKING WATER DRAINAGE
Remove the front panel from the unit according to the following instructions:
a)
Open the front fin onthe indoor unit (rotate it downwards)
b) As shown inthe figures below, remove the two protections from the front panel, then remove
the two fixing screws.
c) Pull the panel towards you to remove it.
Checking water drainage
a)
Place a container beneath the drainage channel.
b) Check that drainage passes through the appropriate hole.
4.3. INSTALLING THE OUTDOOR UNIT
• Make sure that outdoor unit is fastened securely to prevent strong wind from pulling it off.
• Install the unit in accordance with the information contained in the table below.
• lf installing in marine environments or in locations that are very high in relation to the ground
floor and/or in the presence of strong winds, use a locking plate and fit it against the wall so
that the compressor can operate properly.
• lf installing in a normal location, the structure of the support base must be made of concrete
or material with equivalent strength and have necessary support ability. Alternatively, adopt
by all the support measures needed to prevent the unit from vibrating.
Fixing nut
Directional fins
Fixing nut
Frontal panel
Pull the front
forward and
remove

14
CONNECTING THE PIPING
Wrap all the pipes, the drainage pipe and the electrical cables from the top to the bottom. Wrap
the pipes with tape along the route and secure them to the wall with the special clips. These
steps only concern cases where the outdoor unit is installed below the indoor one.
• lf you want to add additional water drainage, keep at a certain distance from the ground and
from the surface of the water. Do not immerse the pipe(s) in the water.
• Secure the pipe(s) to the wall so they are not affected
by thewind.
• Wrap the pipes and electrical cables well from bottom
totop.
• Wrap the pipes and shape them, especially around
corners to prevent water from infiltrating the home.
• Use clamps or other accessories to secure the pipes
to thewall.
MODEL
A (mm)
B (mm)
LSGT25-S
539
287
LSGT35-S
539
287
LSGT50-S
546
316
LSGT70-S
632
355
Left bracket foot
Right bracket foot
Air inlet
Air outlet
Control panel cover
Use special tape to cover any
joint leaks
Tubi
Connection pipe
Drainage pipe
Cover with tape
Round at this point to prevent moisture from infiltrating the electrical parts
Connection cable
Use special tape to
cover any joint leaks
Circular shape
Circular shape

15
5.1. CONNECTING THE PIPING
• The method tor connecting the piping is the same tor bothunits, indoor and outdoor.
• Connect the pipes to the unit. Tighten until the connection becomes firm and secure. Follow
the directions shown in the figure.
• Focusing on the center of the pipe, tighten the screw firmly.
• Tighten the conical nuts as shown in the figure by applying the corresponding torque
according to the diameter of the pipe.
PIPE DIAMETER
TORQUE
Ø 6,36mm(1/4")
15 ~ 25 N.m
Ø 9,52mm(3/8")
35 ~ 40 N.m
Ø 12,7mm(1/2")
45 ~ 60 N.m
Ø 15,88mm(5/8")
73 ~ 78 N.m
Reference image far the direction of connection
5. REFRIGERANT GAS PIPING
Liquid pipe
Outdoor unit
Adjustable
Indoor unit
Conical nuts
Gas pipe
Pipe
Adjustable wrench
Torque wrench
Connection screw

16
5.2. LEAK TEST
Once all the refrigerant pipes have been connected, perform a test by pressurizing the system with
nitrogen to make sure there are no leaks.
METHOD
1.
Connect the pressure gauge unit to the service valve on the outdoor unit gas pipe.
2. With the outdoor unit service valves closed, connect the nitrogen cylinder to the pressure gauge
unit so as to charge the pipes.
3. Charge the installation (pipes and indoor unit) with nitrogen at a pressure of about 40 bar.
4. Close the pressure gauge unit valves on the cylinder side. Then wait for the pressure to
stabilize.
5. Make sure that the pressure does not decrease. Once the pressure has stabilized, the test time
can be about 30 minutes.
6. After checking that the system isnotleaking (using special leak detection devices), close the
valve on the pressure gauge unit to remove the nitrogen cylinder.
5.3. CREATING THE VACUUM
After connecting the pipes and checking that there are no leaks, it is very important to create a
vacuum in the system to eliminate the moist air from inside it. Failure to do so could cause problems
to the compressor. Use a pump specifically certified for R32 gas.
METHOD
1. Connect the vacuum pump to the pressure gauge unit on the centralsocket.
2. Connect the low pressure side of the pressure gauge unit to the service valve on the outdoor
unit (gas side).
3. Open the low pressure side of the pressure gauge unit, with the service valve on the outdoor
unit still closed.
4. Start up the vacuum pump. Leave the pump running until the pressure gauge indicates a
pressure value of -76cm/Hg.
5. This operation will last 15 minutes or more.
6. Once the process has been completed, close the valve on the unit and turn off the vacuum pump.
Valve block
Pressure gauge
High pressure knob
-76 cmHg
Low pressure
knob
Recharge
Low pressure valve
Pump
Recharge cable

17
5.4. REFRIGERANT GAS CHARGE
lf you need to install a length of pipe longer than standard (the length tor which the unit is pre-
charged), you must add the appropriate refrigerant charge.
LSGT25-S
LSGT35-S
LSGT50-S
LSGT70-S
Additional charge (g/m)
15
15
25
30
METHOD
1. Calculate the refrigerant charge to be added considering the parameters specified in the
"LENGTH OF REFRIGERANT CONNECTIONS" section in thismanual.
2. Connect the R32 refrigerant cylinder in a position where the liquid can be charged into the
pressure gauge unit valve where the nitrogen cylinder or the vacuum pump have been collected.
3. Connect the pressure gauge unit to the outdoor unit charging valve (gas). When injecting the
liquid refrigerant through the gas valve, you must act slowly and pay close attention so as to
prevent liquid hammer to thecompressor.
4. Place the refrigerant cylinder on an electronic scale.
5. Open the valve to allow the refrigerant to pass through.
6. Close the valve when the weight of the cylinder coincides with the amount to be charged.
The connection cables must comply with the specifications listed in the table below.
N.B.
Connection cables are those cables connecting the outdoor unit and the indoor unit.
Power cables are those cables connecting the outdoor unit and the electrical mains.
6.1. WIRING THE INDOOR UNIT
Open the front, insert the connection cables from the base of the air conditioner by connecting them
to the respective terminals and secure them using appropriate cable glands present near the
terminals (as shown in the figure below).
Outdoor unit model
LSGT25-S
LSGT35-S
LSGT50-S
LSGT70-S
Connection cable specification
4 x 1,5 mm
2
4 x 1,5 mm
2
4 x 2,5 mm
2
4 x 2,5 mm
2
Power cable specification
2 x 1,5 mm
2
2 x 1,5 mm
2
2 x 2,5 mm
2
2 x 2,5 mm
2
6. WIRING

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6.2. WIRING THE OUTDOOR UNIT
Unscrew the front panel, remove the unit cover panel.
• Connect the earthing wire to the corresponding screw.
• Connect all the cables to the terminal block.
• Reinstall the panels correctly
NOTE
• Connect the earthing cable correctly or it may cause the failure of any of electrical
component, shocks or fire.
• Do not reverse the power supply polarity.
• Secure the cable clamping screw slowly at first, then tighten it firmly once the cable has
been inserted.

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7.1. TEST PROCEDURES
•
Make sure that both the liquid and gas valves are fully open. Make sure there are no
refrigerant leaks.
• Make sure that the electrical wiring of the indoor and outdoor units is connected as shown
in "WIRING".
• Make sure that each terminal (L, N) is correctly connected to the mains.
• Turn on the air conditioner in cooling mode tor 30 minutes or more.
7.2. EVALUATING PERFORMANCE
MODEL:
SERIAL NUMBER:
CUSTOMER NAME ANO ADDRESS:
DATE:
•ls the direction of rotation of the indoor unit fan correct?
•ls the direction of rotation of the outdoor unit fan correct?
• Can you hear any abnormal compressor noises?
• Has the unit continued to run tor at least 30 minutes?
• Checking the temperature inthe room:
In: BS /BU___°C
Out: BS / BU___°C
• Checking the outdoor temperature:
In: BS /BU___°C
Out: BS / BU___°C
• Checking the pressure:
Discharge pressure:Ps= Bar
lntake pressure: Pa=___Bar
• Checking the voltage:
Rated voltage:___V
• Check the current reaching thecompressor
Power consumption:___kW
Current consumption:___A
• ls the refrigerant charge sufficient?
• Are the devices tor controlling operation working correctly?
• Are the safety devices working correctly?
• Has the unit been checked tor refrigerant leaks?
• ls the unit is clean both inside andoutside?
• ls all the equipment secured?
• ls the equipment secured so that it does not make any noise?
• ls the filter clean?
• ls the heat exchanger clean?
• Are the gas and liquid service valves open?
• Does the wastewater drain away without anyproblems?
7. OPERATING TEST

The possible error codes that may appear on the display of the indoor unit are as follows:
CODICE DI ERRORE
PROBLEMA
E1
Fault with the room temperature sensor
E2
Fault with the refrigerant temperature sensor on the outdoor unit
E3
Fault with the refrigerant temperature sensor on the indoor unit
E4
Fault with the fan motor on the indoor unit (PG motor)
E5 (5E)
Communication error between the outdoor unit and the indoor unit
F0
Fault with the fan motor on the outdoor unit (DC motor)
F1
Fault with the inverter module protection (1PM)
F2
Fault with the outdoor unit board protection (PFC)
F3
Fault with the compressor synchronism
F4
Fault with the discharge temperature sensor
F5
Fault with the overheating protection on the compressor head
F6
Fault with the outdoor temperature sensor
F7
Fault with the over-voltage or low voltage protection
F8
Communication fault between the outdoor unit and the outdoor
unit control board unit (model LSGT70-S only)
F9
Fault with the outdoor unit EPROM
FA
Fault with the intake temperature sensor
P4
Overload protection in cooling mode
P5
Overload protection in heating mode
P6
Anti-overheating protection of indoor unit in heating mode
P7
Anti-freeze protection of indoor unit in cooling mode
P8
Overcurrent protection in outdoor unit
8. ERROR CODES