Bosch Climate 5000 AA Series User manual

Bosch Inverter One-Two/One-Three/One-Four/One-Five
Split-Type Air Conditioner / Heat Pump
Climate 5000 AA Series
Installation Manual

2
|Bosch Climate 5000 AA Series Inverter Multi Split-Type Air Conditioner/ Heat Pump Installation Manual
01.2017 |Bosch Thermotechnology Corp.Data subject to change

Installation Manual Bosch Climate 5000 AA Series Inverter Multi Split-Type Ductless Air Conditioner / Heat Pump | 3
Bosch Thermotechnology Corp. |01.2017 Data subject to change
Table of Contents
1 Key to symbols and safety instructions 4
1.2 Safety 4
2 Components 5
3 Installation Overview / Order 6
4 Installation Diagram 7
5 Specifications 8
6 Outdoor unit installation 9
7 Refrigerant piping connection 12
7.1 Refrigerant Piping Connection Instructions 12
8 Wiring 15
8.1 Outdoor unit wiring 15
8.2 Wiring Diagrams 16
9 Air evacuation 19
9.1 Evacuation instructions 19
9.3 Safety And Leakage Check 21
10 Test run 22
10.1 Before Test Run 22
10.2 Test run instructions 22
11 Automatic Wiring/Piping Correction Function 23
11.1 How To Activate This Function 23
12 Features and operation 24
12.1 Protection of the air conditioner 24
12.2 Operation 24
13 Troubleshooting 25
13.1 Common issues 25
14 Disposal guidelines 27

4
|Bosch Climate 5000 AA Series Inverter Multi Split-Type Air Conditioner/ Heat Pump Installation Manual
01.2017 |Bosch Thermotechnology Corp.Data subject to change
1 Key to symbols and safety instructions
1.1 Key to symbols
Warnings
Warnings in this document are identified by a
warning triangle printed against a grey background.
Keywords at the start of a warning indicate the type and seriousness
of the ensuing risk if measures to prevent the risk are not taken.
The following keywords are defined and can be used in this document:
DANGER indicates a hazardous situation which, if not avoided, will result in
death or serious injury.
WARNING indicates a hazardous situation which, if not avoided, could
result in death or serious injury.
CAUTION indicates a hazardous situation which, if not avoided, could
result in minor to moderate injury.
NOTICE is used to address practices not related to personal injury.
Important information
This symbol indicates important information where
there is no risk to people or property.
1.2 Safety
Please read safety precautions before installation
Incorrect installation due to ignoring instructions can cause serious damage or injury.
WARNING:
In certain functional environments, such as kitchens, server
rooms, etc., the use of specially designed air-conditioning
units is highly recommended.
WARNING:
Only trained and certified technicians should install, repair
and service this air conditioning unit.
Improper installation may result in electrical shock, short
circuit, leaks, fire or other damage to the equipment and
personal property.
WARNING: INSTALLATION REQUIREMENTS
Strictly follow the installation instructions set forth in this
manual. Improper installation may result in electrical shock,
short circuit, leaks, fire or other damage to the equipment.
Before you install the unit, consider strong winds, typhoons
and earthquakes that might affect your unit and locate it
accordingly. Failure to do so could cause the equipment to
fail.
After installation, ensure there are no refrigerant leaks and
that the unit is operating properly. Refrigerant is both toxic
and flammable and poses a serious health and safety risk.
NOTICE: FLUORINATED GASSES [REFRIGERANT]
This air-conditioning unit contains fluorinated gasses. For
specific information on the type of gas and the amount,
please refer to the relevant label on the outdoor unit itself.
Installation, service, maintenance and repair of this unit must
be performed by a certified technician.
Product removal and recycling must be performed by a
certified technician.
If the system has a leak-detection system installed, it must be
checked for leaks at least every 12 months.
When the unit is checked for leaks, proper record-keeping of
all checks is strongly recommended.

Installation Manual Bosch Climate 5000 AA Series Inverter Multi Split-Type Ductless Air Conditioner / Heat Pump | 5
Bosch Thermotechnology Corp. |01.2017 Data subject to change
2 Components
The air conditioning / heat pump system installation requires the following
components. Use all of the installation parts and components to install the air
conditioner. Improper installation may result in water leakage, electrical shock and
fire, or equipment failure.
Name Image Quanity
Drain joint 1
Seal ring 1
Connecting pipe assembly
Liquid side Φ6.35 (1/4 in)
Parts not included.
Piping kits are available
as an accessory.
Φ9.52 (3/8 in)
Gas side
Φ9.52 (3/8 in)
Φ12.7 (1/2 in)
Φ 16 (5/8 in)
Multi-zone installation manual 1
Transfer connector
NOTE: Pipe sizes may vary between air handler equipment and condensing section connections. To meet different pipe size requirements,
it may be necessary to install an adapter (transfer connector) on the outdoor unit connection.
Not included, but may be
required - 1 per indoor unit
Magnetic ring (Hitch on the connective cable between the indoor unit and outdoor unit after installation.)
Not included, but
recommended to use 1 per
cable.
Power cable for connection with external power supply Not included (see section 9
for cable requirements)
Table 1

6
|Bosch Climate 5000 AA Series Inverter Multi Split-Type Air Conditioner/ Heat Pump Installation Manual
01.2017 |Bosch Thermotechnology Corp.Data subject to change
3 Installation Overview / Order
LN
123
MC MC
4
5
Install the outdoor unit
(Page 9)
Evacuate the refrigeration
system
(Page 20)
Connect the wires
(Page 14)
Connect the refrigerant pipes
(Page 12)
Perform a test run
(Page 22)
Figure 1

Installation Manual Bosch Climate 5000 AA Series Inverter Multi Split-Type Ductless Air Conditioner / Heat Pump | 7
Bosch Thermotechnology Corp. |01.2017 Data subject to change
4 Installation Diagram
More than 4.7in
More than 4.7in
More than
4.7in
More than
4.7in
More than 4.7in
More than
3.9in
More than
23.6in
More than
11.8in
More than 23.6in
More than 5.9in
More than 78.7in
Figure 2
NOTICE:
This illustration is for demonstration purposes only.
The actual shape of your air condtioner may be slightly
different.
Copper lines must be independently insulated.
CAUTION:
To prevent wall damage, use a stud finder to locate studs.
A minimum pipe run of 10ft is recommended to minimize
vibration & excessive noise.
Two of the A, B, and C air circulation pathways must be free
from obstructions at all times.

8
|Bosch Climate 5000 AA Series Inverter Multi Split-Type Air Conditioner/ Heat Pump Installation Manual
01.2017 |Bosch Thermotechnology Corp.Data subject to change
5 Specifications
Number of units that can be used together Connected units 1-5 units
Compressor stop/start frequency Stop time 3 min or more
Power source voltage
voltage fluctuation within ±10% of rated voltage
voltage drop during start within ±15% of rated voltage
interval unbalance within ±3% of rated voltage
Table 2
1 drive 2 1 drive 3 1 drive 4 1 drive 5
Model BMS500-AAM018-1CSXXA BMS500-AAM027-1CSXXA BMS500-AAM036-1CSXXA BMS500-AAM048-1CSXXA
Max. equivalent length for all connected
indoor units 98.4 ft / 30 m 147.6 ft / 45 m 196.8 ft / 60 m 246 ft / 75 m
Max. equivalent length for one indoor unit 82 ft / 25 m 98.4 ft / 30 m 114.8 ft / 35 m 114.8 ft / 35 m
Max. height different
between indoor and
outdoor unit
OU higher than IU 49 ft / 15 m 49 ft / 15 m 49 ft / 15 m 49 ft / 15 m
OU lower than IU 49 ft / 15 m 49 ft / 15 m 49 ft / 15 m 49 ft / 15 m
Max. height different between indoor units 32.8 ft / 10 m 32.8 ft / 10 m 32.8 ft / 10 m 32.8 ft / 10 m
Table 3 Refrigerant pipe requirements
When installing multiple indoor units with a single outdoor unit, ensure that the
length of the refrigerant pipe and the drop height between the indoor and outdoor
units meet the requirements illustrated in the following diagram (indoor units may be
located above or below the outdoor unit as long as they meet these height difference
requirements):
≤32.8ft
(10m)
Indoor unit
Indoor unit
Outdoor unit
≤49ft
(15m)
Max.Height difference
Figure 3

Installation Manual Bosch Climate 5000 AA Series Inverter Multi Split-Type Ductless Air Conditioner / Heat Pump | 9
Bosch Thermotechnology Corp. |01.2017 Data subject to change
6 Outdoor unit installation
Step 1: Select installation location
The outdoor unit should be installed in the location that meets the following
requirements:
Place the outdoor unit as close to the indoor unit as possible.
Ensure that there is enough room for installation and maintenance.
The air inlet and outlet must not be obstructed or exposed to strong wind.
Ensure the location of the unit will not be subject to snowdrifts,
accumulation of leaves or other seasonal debris. If possible, provide an
awning for the unit. Ensure the awning does not obstruct airflow.
The installation area must be dry and well ventilated.
There must be enough room to install the connecting pipes and cables and
to access them for maintenance.
The area must be free of combustible gases and chemicals.
The pipe length between the outdoor and indoor unit may not exceed the
maximum allowable pipe length.
If possible, DO NOT install the unit where it is exposed to direct sunlight.
If possible, make sure the unit is located far away from your neighbors’
property so that the noise from the unit will not disturb them.
If the location is exposed to strong winds (for example: near a seaside), the
unit must be placed against the wall to shelter it from the wind. If necessary,
use an awning. (See Fig.4 & 5)
Strong wind
Strong wind
Figure 4
Strong wind
Figure 5
Install the indoor and outdoor units, cables and wires at least 3ft from
televisions or radios to prevent static or image distortion. Depending on the
radio waves, a 3ft distance may not be enough to eliminate all interference.
Step 2: Install outdoor unit.
CAUTION:
Be sure to remove any obstacles that may block air
circulation.
Make sure you refer to Length Specifications to ensure there
is enough room for installation and maintenance.
Fix the outdoor unit with anchor bolts (M10).
>23.6" / 60cm
Fix with bolts
Figure 6

10
|Bosch Climate 5000 AA Series Inverter Multi Split-Type Air Conditioner/ Heat Pump Installation Manual
01.2017 |Bosch Thermotechnology Corp.Data subject to change
Split type outdoor unit mounting dimensions
Outdoor Unit Dimensions [in.] Mounting Dimensions
[in. (mm)]
W x H x D Distance A Distance B
BMS500-AAM018-
1CSXXA 33.3x14.3x27.6 21.3 (540) 13.8 (350)
BMS500-AAM027-
1CSXXA 37.2x16.1x31.9 26.5 (673) 15.9 (403)
BMS500-AAM036-
1CSXXA 37.2x16.1x31.9 26.5 (673) 15.9 (403)
BMS500-AAM048-
1CSXXA 37.5x16.3x52.5 25.0 (634) 15.9 (404)
Table 4
A
B
D
W
H
W
H
Figure 7
Row of series installation
The relations between H, A and L are as follows:
LA
L ≤ H
L ≤ 1/2H 9.8" / 25 cm or more
1/2H < L ≤ H 11.8" / 30 cm or more
L > H Can not be installed
Table 5
L
H
118" /300 cm or more
A
23.6" / 60 cm
or more
59" / 150 cm
or more
9.8" / 25 cm
or more
9.8" / 25 cm
or more
Figure 8
The minimum distance between the outdoor unit and walls described
in the installation guide does not apply to airtight rooms. Be sure to keep
the unit unobstructed in at least two of the three directions (M, N, P) (See
Fig. 9)
M
N
P
30 cm / 11.8” from back wall
60 cm / 23.6” on right
evoba
”6.3
2
/
m
c06
30 cm / 11.8” on left
200 cm / 78” in front
Figure 9

Installation Manual Bosch Climate 5000 AA Series Inverter Multi Split-Type Ductless Air Conditioner / Heat Pump | 11
Bosch Thermotechnology Corp. |01.2017 Data subject to change
Drain joint installation
Before bolting the outdoor unit in place, you must install the drain joint at the bottom
of the unit. (See Fig. 10)
1. Fit the rubber seal on the end of the drain joint where it will connect to the
outdoor unit.
2. Insert the drain joint into the hole in the base pan.
3. Rotate the drain joint 90° until it clicks in place and faces the front of the unit.
4. Connect a drain hose extension (not included) to the drain joint to redirect
water from the unit during heating mode.
Make sure the water drains to a safe location where it will not cause water
damage or a slipping hazard.
Seal
Drain joint
)B()A(
Base pan hole of
outdoor unit
Seal
Figure 10
Drilling a hole in the wall
You must drill a hole in the wall for the refrigerant piping, and signal cable that will
connect the indoor and outdoor units.
1. Determine the location of the wall hole based on the location of the outdoor
unit.
2. Using a 65-mm (2.5”) core drill, drill a hole in the wall.
When drilling the wall hole, make sure to avoid wires, plumbing, and other
sensitive components.
3. Place the protective wall cuff in the hole. This protects the edges of the hole
and helps seal it when you finish the installation process.
Connecting a 24k Btuh Indoor Unit
A 24K Btuh indoor unit can only be connected to an A system connection point.
If there are two 24K Btuh indoor units, they can be connected with the A and B
connection points. (See Fig. 11)
Connective pipe sizes
Indoor Unit capacity (Btu/h) Liquid Gas
9K 1/4" 3/8"
12K/18K 1/4" 1/2"
24K 3/8" 5/8"
Table 6
Multi-zone condensing section refrigerant line connection sizes
Model
A
(liq /gas)
(inches)
B
(liq /gas)
(inches)
C
(liq /gas)
(inches)
D
(liq /gas)
(inches)
E
(liq /gas)
(inches)
BMS500-AAM018-
1CSXXA
Φ 1/4" /
3/8"
Φ 1/4" /
3/8" N/A N/A N/A
BMS500-AAM027-
1CSXXA
Φ 1/4" /
3/8"
Φ 1/4" /
3/8"
Φ 1/4" /
3/8" N/A N/A
BMS500-AAM036-
1CSXXA
Φ 1/4" /
3/8"
Φ 1/4" /
3/8"
Φ 1/4" /
3/8"
Φ 1/4" /
1/2" N/A
BMS500-AAM048-
1CSXXA
Φ 1/4" /
3/8"
Φ 1/4" /
3/8"
Φ 1/4" /
3/8"
Φ 1/4" /
1/2"
Φ 1/4" /
1/2"
Table 7
Figure 11

12
|Bosch Climate 5000 AA Series Inverter Multi Split-Type Air Conditioner/ Heat Pump Installation Manual
01.2017 |Bosch Thermotechnology Corp.Data subject to change
7 Refrigerant piping connection
WARNING:
All field piping must be completed by a licensed technician
and must comply with the local and national regulations.
When the air conditioner is installed in a small room,
measures must be taken to prevent the refrigerant
concentration in the room from exceeding the safety limit in
the event of refrigerant leakage. If the refrigerant leaks and its
concentration exceeds its proper limit, hazards due to lack of
oxygen may result.
When installing the refrigeration system, ensure that air,
dust, moisture or foreign substances do not enter the
refrigerant circuit. Contamination in the system may cause
poor operating capacity, high pressure in the refrigeration
cycle, explosion or injury.
Ventilate the area immediately if there is refrigerant leakage
during the installation. Leaked refrigerant gas is both toxic
and flammable. Ensure there is no refrigerant leakage after
completing the installation work.
7.1 Refrigerant Piping Connection Instructions
NOTICE:
The branching pipe must be installed horizontally. An angle of
more than 10° may cause malfunction.
DO NOT install the connecting pipe until both indoor and
outdoor units have been installed.
Insulate both the gas and liquid piping to prevent water
leakage.
Step 1: Cut pipes
When preparing refrigerant pipes, take extra care to cut and flare them properly. This
will ensure efficient operation and minimize the need for future maintenance.
1. Measure the distance between the indoor and outdoor units.
2. Using a pipe cutter, cut the pipe a little longer than the measured distance.
NOTICE:
DO NOT deform pipe while cutting. Be extra careful not to
damage, dent, or deform the pipe while cutting. This will
drastically reduce the heating efficiency of the unit.
3. Make sure that the pipe is cut at a perfect 90° angle. Refer to Fig.12 for cut
examples.
F
Oblique Rough Warped
90°
igure 12
Step 2: Remove burrs
Burrs can affect the air-tight seal of refrigerant piping connection. They must be
completely removed.
1. Hold the pipe at a downward angle to prevent burrs from falling into the pipe.
2. Using a reamer or deburring tool, remove all burrs from the cut section of the
pipe.
Pipe
Reamer
Point down
Figure 13

Installation Manual Bosch Climate 5000 AA Series Inverter Multi Split-Type Ductless Air Conditioner / Heat Pump | 13
Bosch Thermotechnology Corp. |01.2017 Data subject to change
Step 3: Flare pipe ends
Proper flaring is essential to achieve an airtight seal.
1. After removing burrs from cut pipe, seal the ends with PVC tape to prevent
foreign materials from entering the pipe.
2. Sheath the pipe with insulating material.
3. Place flare nuts on both ends of pipe. Make sure they are facing in the proper
direction, because you can’t put them on or change their direction after
flaring. See Fig. 14.
Flare nut
Copper pipe
Figure 14
4. Remove tape from ends of pipe when ready to perform flaring work.
5. Clamp flaring block on the end of the pipe. The end of the pipe must extend
beyond the flare form.
Flaring tool
Tube
A
Figure 15
6. Place flaring tool onto the flaring block.
7. Turn the handle of the flaring tool clockwise until the pipe is fully flared. Flare
the pipe in accordance with the dimensions shown in table 8.
Piping extension beyond flare form
Outer
diameter
of tube in.
(mm)
Tightening
Torque
lb ft (N•m)
Max.
Tightening
Torque
lb ft (N•m)
Fig. 15, A in. (mm)
Min. Max.
1/4" (6.4) 11.0 (15.0) 11.8 (16.0) 0.0275 (0.7) 0.05 (1.3)
3/8" (9.5) 18.4 (25.0) 19.2 (26.0) 0.04 (1.0) 0.063 (1.6)
1/2" (12.7) 25.8 (35.0) 26.6 (36.0) 0.04 (1.0) 0.07 (1.8)
5/8" (15.9) 33.2 (45.0) 34.7 (47.0) 0.078 (2.0) 0.086 (2.2)
Table 8
8. Remove the flaring tool and flaring block, then inspect the end of the pipe for
cracks and even flaring.
Step 4: Connect pipes
Connect the copper pipes to the indoor unit first, then connect it to the outdoor unit.
You should first connect the low-pressure pipe, then the high-pressure pipe.
1. When connecting the flare nuts, apply a thin coat of refrigeration oil to the
flared ends of the pipes.
2. Align the center of the two pipes that you will connect.
Indoor unit tubing Flare nut Pipe
Figure 16
3. Tighten the flare nut as tightly as possible by hand.
4. Using a wrench, grip the nut on the unit tubing.
5. While firmly gripping the nut, use a torque wrench to tighten the flare nut
according to the torque values in table 7.
Figure 17

14
|Bosch Climate 5000 AA Series Inverter Multi Split-Type Air Conditioner/ Heat Pump Installation Manual
01.2017 |Bosch Thermotechnology Corp.Data subject to change
CAUTION:
Ensure to wrap insulation around the piping. Direct contact
with the bare piping may result in burns or frostbite.
NOTICE:
Make sure the pipe is properly connected. Over tightening
may damage the bell mouth and under tightening may lead to
leakage.
MINIMUM BEND RADIUS
Carefully bend the tubing in the middle according to the diagram below.
DO NOT bend the tubing more than 90° or more than 3 times.
Bend the pipe with thumb
min-radius 10cm (3.9”)
Figure 18
6. After connecting the copper pipes to the indoor unit, wrap the power cable,
signal cable and the piping together with binding tape.
DO NOT intertwine signal cable with other wires. While bundling these
items together, do not intertwine or cross the signal cable with any other
wiring.
7. Thread this pipeline through the wall and connect it to the outdoor unit.
8. Insulate all the piping, including the valves of the outdoor unit.
9. Open the stop valves of the outdoor unit to start the flow of the refrigerant
between the indoor and outdoor unit.
CAUTION:
Check to make sure there is no refrigerant leak after
completing the installation work. If there is a refrigerant leak,
ventilate the area immediately and evacuate the system (refer
to the Air Evacuation section of this manual).

Installation Manual Bosch Climate 5000 AA Series Inverter Multi Split-Type Ductless Air Conditioner / Heat Pump | 15
Bosch Thermotechnology Corp. |01.2017 Data subject to change
8 Wiring
WARNING:
Be sure to disconnect the power supply before working on
the unit.
All electrical wiring must be done according to local and
national regulations.
Electrical wiring must be done by a qualified technician.
Improper connections may cause electrical malfunction,
injury and fire.
An independent circuit and single outlet must be used for this
unit. DO NOT plug another appliance or charger into the same
outlet.If the electrical circuit capacity is not enough or there
is a defect in the electrical work, it can lead to shock, fire, unit
and property damage.
Connect the power cable to the terminals and fasten it with a
clamp. An insecure connection may cause fire.
Make sure that all wiring is done correctly and the control
board cover is properly installed. Failure to do so can cause
overheating at the connection points, fire, and electrical
shock.
Ensure that main supply connection is made through a switch
that disconnects all poles, with contact gap of a least 3mm
(0.118”).
DO NOT modify the length of the power cord or use an
extension cord.
CAUTION:
Connect the outdoor wires before connecting the indoor
wires.
Make sure you ground the unit. The grounding wire should be
away from gas pipes, water pipes, lightning rods, telephone
or other grounding wires. Improper grounding may cause
electrical shock.
DO NOT connect the unit with the power source until all wiring
and piping is completed.
Make sure that you do not cross your electrical wiring
with your signal wiring, as this can cause distortion and
interference.
Follow these instructions to prevent distortion when the compressor starts:
The unit must be connected to the main outlet. Normally, the power supply
must have a low output impedance of 32 ohms.
No other equipment should be connected to the same power circuit.
The unit’s power information can be found on the rating sticker on the
product.
8.1 Outdoor unit wiring
WARNING:
Before performing any electrical or wiring work, turn off the
main power to the system.
1. Prepare the cable for connection
a. You must first choose the right cable size before preparing it for
connection. Be sure to use SOOW type cables.
Rated Current of Appliance (A) AWG
≤ 7 18
7 - 13 16
13 - 18 14
18 - 25 12
25 - 30 10
Table 9
b. Using wire strippers, strip the rubber jacket from both ends of signal/
power cable to reveal about 15cm (5.9”) of the wires inside.
c. Strip the insulation from the ends of the wires.
d. Using a wire crimper, crimp u-lugs on the ends of the wires.
While connecting the wires, please strictly follow the wiring diagram
(found inside the electrical box cover).
2. Remove the electric cover of the outdoor unit. If there is no cover on the
outdoor unit, disassemble the bolts from the maintenance board and remove
the protection board. (See Fig. 19)
Cover
Screw
Figure 19
3. Connect the u-lugs to the terminals. Match the wire colors/labels with the
labels on the terminal block, and firmly screw the u-lug of each wire to its
corresponding terminal.
4. Clamp down the cable with designated cable clamp.

16
|Bosch Climate 5000 AA Series Inverter Multi Split-Type Air Conditioner/ Heat Pump Installation Manual
01.2017 |Bosch Thermotechnology Corp.Data subject to change
8.2 Wiring Diagrams
CAUTION:
Connect the connective cables to the terminals, as identified,
with their matching numbers on the terminal block of the
indoor and outdoor units. For example, in the US models
shown in thefollowing diagram, Terminal L1(A) of the outdoor
unit must connect with terminal L1 on the indoor unit.
Correct Incorrect
Figure 20
CAUTION:
After confirmation of the conditions in Figures 20 & 21, follow these
guidelines when performing wiring:
Always have an individual power circuit specifically for the air
conditioner. Always follow the circuit diagram posted on the
inside of the control cover.
Screws fastening the wiring in the casing of electrical fittings
may come loose during transporation. Because loose screws
may cause wire burn-out, check that the screws are tightly
fastened. Check the specifications for the power source.
Confirm that electrical capacity is sufficient.
Confirm that the cable thickness is as specified in the power
source specifications.
Always install an earth leakage circuit breaker in wet or moist
areas.
The following can be caused by a drop in voltage: vibration of
a magnetic switch, damaging the contact point, broken fuses,
and disturbance of normal functioning.
Disconnection from a power supply must be incorporated into
the fixed wiring. It must have an air gap contact separation of
at least 3mm in each active (phase) conductors.
Before accessing terminals, all supply circuits must be
disconnected.
Refer to the following figures for unit wiring . Run the main power cord
through the lower line-outlet of the cord clamp.

Installation Manual Bosch Climate 5000 AA Series Inverter Multi Split-Type Ductless Air Conditioner / Heat Pump | 17
Bosch Thermotechnology Corp. |01.2017 Data subject to change
One-two model
Magnetic ring ( not supplied, optional part)
(Used to hitch to the connective cable of indoor
and outdoor units after installation.)
One-three model
Figure 21

18
|Bosch Climate 5000 AA Series Inverter Multi Split-Type Air Conditioner/ Heat Pump Installation Manual
01.2017 |Bosch Thermotechnology Corp.Data subject to change
Magnetic ring ( not supplied, optional part)
(Used to hitch to the connective cable of indoor
and outdoor units after installation.)
One-four model
One-five model
Figure 22

Installation Manual Bosch Climate 5000 AA Series Inverter Multi Split-Type Ductless Air Conditioner / Heat Pump | 19
Bosch Thermotechnology Corp. |01.2017 Data subject to change
9 Air evacuation
CAUTION:
Use a vacuum pump with a gauge reading lower than
-29.92"Hg.
The outdoor unit does not need to be vacuumed. DO NOT
open the outdoor unit’s gas and liquid stop valves.
Ensure that the Compound Meter reads -29.92"Hg or below
after 2 hours. If after three hours the gauge reading is still
above -29.92"Hg, check if there is a gas leak or water inside
the pipe. If there is no leak, perform another evacuation for 1
or 2 hours.
DO NOT use refrigerant gas to evacuate the system.
9.1 Evacuation instructions
Before using the manifold gauge and vacuum pump, read their operation manuals to
familiarize yourself with how to use them properly.
Manifold Gauge
Compound gauge
-76cmHg
or -29.92"Hg
Low pressure valve
High pressure
valve
Pressure hose /
Charge hose
Charge hose
Vacuum
pump
Pressure gauge
Low pressure valve
Figure 23
1. Connect the charge hose of the manifold gauge to service port on the outdoor
unit’s low pressure valve.
2. Connect another charge hose from the manifold gauge to the vacuum pump.
3. Open the Low Pressure side of the manifold gauge. Keep the High Pressure
side closed.
4. Turn on the vacuum pump to evacuate the system.
5. Run the vacuum until the Compound Meter reads -76cmHg / -29.92"Hg
(-101 kPa). It is recommended to use a micron gauge; run the vacuum until
the micron gauge reads 350 to 500 microns or less.
6. Close the Low Pressure side of the manifold gauge, and turn off the vacuum
pump.
7. Wait for approximately 10 to 15 minutes, then check that there has been no
change in system pressure. It is recommended to use a micron gauge; check
to make sure the system is still below 500 microns.
If there is no change in system pressure, unscrew the cap from the packed
valve (high pressure valve). If there is a change in system pressure, there
may be a gas leak.
8. Insert a 5mm allen wrench into the packed valve (high pressure valve) and
open the valve by turning the wrench in a 1/4 counterclockwise turn. Listen
for gas to exit the system, then close the valve after 5 seconds.
Flare nut
Cap
Valve body
Valve stem
Figure 24
9. Watch the Pressure Gauge for one minute to make sure that there is no
change in pressure. The Pressure Gauge should read slightly higher than
atmospheric pressure.
10. Remove the charge hose from the service port.
11. Using hexagonal wrench, fully open both the high pressure and low pressure
valves.
NOTICE: Open valve stems gently
When opening valve stems, turn the hexagonal allen wrench
until it hits against the stopper. Do not try to force the valve to
open further.
12. Tighten valve caps on all three valves (service port, high pressure, low
pressure) by hand. You may tighten it further using a torque wrench if
needed.
13. If the outdoor unit uses all vacuum valves, and the vacuum position is at
the main valve, the system is not connected with the indoor unit. The valve
must be tightened with a screw nut. Check for gas leaks before operation to
prevent leakage.

20
|Bosch Climate 5000 AA Series Inverter Multi Split-Type Air Conditioner/ Heat Pump Installation Manual
01.2017 |Bosch Thermotechnology Corp.Data subject to change
9.2 Adding refrigerant
CAUTION:
Refrigerant charging must be performed after wiring,
vacuuming, and the leak testing.
DO NOT exceed the maximum allowable quantity of
refrigerant or overcharge the system. Doing so can damage
the unit or impact it’s functioning.
Charging with unsuitable substances may cause explosions or
accidents. Ensure that the appropriate refrigerant is used.
Refrigerant containers must be opened slowly. Always use
protective gear when charging the system.
DO NOT mix refrigerants types.
N=2(one-twin models), N=3(one-three models), N=4(one-four models), N=5(one-
five models).
Depending on the length of connective piping or the pressure of the evacuated
system, you made need to add refrigerant. Refer to table below for refrigerant
amounts to be added:
Additional refrigerant per pipe length
Connective Pipe Air Purging Additional Refrigerant
Pre-charge pipe length(ft/m)
(Standard pipe lengthxN) Vacuum Pump N/A
More than (Standard
pipe lengthxN)ft/m Vacuum Pump
Liquid Side: Ø 6.35 (ø 0.25”)
(Total pipe length - standard pipe lengthxN) x 15g/m
(Total pipe length - standard pipe lengthxN) x 0.16oZ/ft
Liquid Side: Ø 9.52 (ø 0.375”)
(Total pipe length - standard pipe lengthxN) x 30g/m
(Total pipe length - standard pipe lengthxN)x 0.32oZ/ft
Table 10
The standard pipe length is 7.5m (24.6’).