Bosch ACC MT User manual

6720892132 (2021/10) GB/UG/TZ/SC/KE/RW
Installation instructions/Quick-Start-Guide
Central controller with touch display
Air Center Control
ACC MT

Table of contents
Air Center Control – 6720892132 (2021/10)
2
Table of contents
1 Explanation of symbols and safety instructions . . . . . .3
1.1 Explanation of symbols . . . . . . . . . . . . . . . . . . . . . . .3
1.2 General safety instructions . . . . . . . . . . . . . . . . . . . .3
2 Product Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
2.1 Product Description. . . . . . . . . . . . . . . . . . . . . . . . . .5
2.2 Compatible variable refrigerant flow system
components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
2.3 Scope of delivery . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
2.4 Status LED indication . . . . . . . . . . . . . . . . . . . . . . . .7
2.5 Dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
2.6 Connections and control elements . . . . . . . . . . . . . .9
2.6.1 Connections on reverse side without AC EXP . . . . .9
2.6.2 Restore default setting of central controller . . . . 10
2.6.3 Connections on reverse side (AC EXP only). . . . . 10
2.6.4 Connections – view from above . . . . . . . . . . . . . . 11
2.6.5 Connections on right. . . . . . . . . . . . . . . . . . . . . . . 11
2.6.6 Power supply connection . . . . . . . . . . . . . . . . . . . 12
2.6.7 Mains power supply (part number
8733502082). . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2.7 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
3.1 Preparations before installation . . . . . . . . . . . . . . 14
3.1.1 Installation site . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
3.1.2 Use cable feed (optional) . . . . . . . . . . . . . . . . . . . 14
3.1.3 Inserting expansion card AC EXP (optional) . . . . 14
3.1.4 Cable specifications . . . . . . . . . . . . . . . . . . . . . . . 15
3.2 Types of installation . . . . . . . . . . . . . . . . . . . . . . . . 16
3.2.1 Installation on finished walls without cable
conduit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
3.2.2 Installation on finished walls with cable
conduit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
3.2.3 Hook in central controller and fasten . . . . . . . . . . 18
3.2.4 Removing the central controller . . . . . . . . . . . . . . 18
4 Commissioning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
4.1 Configuration wizard . . . . . . . . . . . . . . . . . . . . . . . 19
4.2 Recommended system configuration. . . . . . . . . . 19
5 First steps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
5.1 Overview Dashboard . . . . . . . . . . . . . . . . . . . . . . . 20
5.2 Changing the keyboard assignment . . . . . . . . . . . 21
6 System handover. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
7 Help and operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
8 Environmental protection and disposal . . . . . . . . . . . 23
9 Open Source Software . . . . . . . . . . . . . . . . . . . . . . . . . 23
10 Data protection notice . . . . . . . . . . . . . . . . . . . . . . . . . 23

Explanation of symbols and safety instructions
3
Air Center Control – 6720892132 (2021/10)
1 Explanation of symbols and safety
instructions
1.1 Explanation of symbols
Warnings
Inwarnings, signal wordsat the beginningof awarning areused
to indicate the type and seriousness of the ensuing risk if
measures for minimizing danger are not taken.
The following signal words are defined and can be used in this
document:
DANGER
DANGER indicates that severe or life-threatening personal
injury will occur.
WARNING
WARNING indicates that severe to life-threatening personal
injury may occur.
CAUTION
CAUTION indicates that minor to medium personal injury may
occur.
NOTICE
NOTICE indicates that material damage may occur.
Important information
The info symbol indicates important information where there is
no risk to people or property.
Additional symbols
Table 1
1.2 General safety instructions
Operation of the ACC MT central controller in the VRF air
conditioning system cannot result in conditions that are
hazardous to the user and environment.
HNotices for the target group
These installation instructions are
intended for qualified persons who are
skilled in dealing with climate, heating
and electrical systems. All instructions
must be observed. Failure to comply
with instructions may result in material
damage and personal injury, including
danger to life.
▶ Read installation manual (outdoor
unit, indoor unit, control unit, ERV
ventilation unit, etc.) prior to
installation.
▶ Observe the safety instructions and
warnings.
▶ Follow national and regional
regulations, technical regulations and
guidelines.
HIntended use
▶ Only use the product to control Air
Flux/MDCI VRF air conditioning
systems (VRF = Variable Refrigerant
Flow).
All other use is considered unsuitable.
Any damage resulting from unsuitable
operations is excluded from liability.
Symbol Meaning
▶ a step in an action sequence
a reference to a related part in the document
•alistentry
–a list entry (second level)

Explanation of symbols and safety instructions
Air Center Control – 6720892132 (2021/10)
4
HElectrical work
Electrical work must only be carried out
by a qualified electrician.
▶ Before starting electrical work:
– Isolate all poles of the mains
voltage and secure against
reconnection.
– Make sure the mains voltage is
disconnected.
▶ Onlyconnect theproducttothemains
voltage using the supplied power
supply unit or a professionally
installed cable in accordance with the
specifications (Table 4, page 15).
▶ Observe the wiring diagrams of other
system components as well.
HNotes regarding fire protection
The variable refrigerant flow central
controller must not be installed in the
following locations:
• Rooms in which fat residues or steam
could damage plastic parts, e. g.
kitchens.
• Locations where harmful gases, e.g.
gases containing sulphuric acid, are
present as this can corrode
components.
• Near machines that give off
electromagnetic radiation.
• Locations where combustible gases
or dusts are present.
• Inlocations with hightemperaturesor
near an open flame.
• Damp rooms where water can enter
the device and cause a short-circuit.
HOriginal spare parts and
accessories
The manufacturer assumes no liability
for damage caused by spare parts not
supplied by the manufacturer.
▶ Use only original spare parts and
accessories from the manufacturer.
HSafety instructions for care and
cleaning
The projected capacitive touchscreen
(PCT) contains a layer of tempered
glass. This could be damaged if the
touchscreen is used incorrectly.
▶ Only operate the touchscreen with a
finger or a capacitive stylus.
▶ Protect against sharp edges and
scratching.
▶ To clean, wipe with a soft cloth.
▶ Do not use organic solvents, acids or
alkaline solutions.
▶ Wipe off water or fat residue without
delay.
HDehumidifying
The Air Flux VRF air conditioning system
can not be used for setting the defined
absolute moisture content of the
ambient air. For applications, where
moisture is critical, such as for example
in museums or libraries, special
dehumidifying or humidifying systems
must be used.

Product Information
5
Air Center Control – 6720892132 (2021/10)
2ProductInformation
2.1 Product Description
The Air Flux product series is an air-conditioning system
solution for commercial buildings, e.g. offices, hotels or
apartment complexes.
The variable refrigerant flow central controller with ACC MT
(Air Center Control) touch screen – referred to as "central
controller" in this document – plays a key role in the operation
of the air-conditioning system. The central controller is
primarily designed to be used and operated by professional
users in the area of HVAC technology who are authorised to
make more in-depth system settings.
The central controller controls up to 32 outdoor or 64 indoor
units (or other units of the type ERV, AF-HB or AHU SET) via an
XYE communication cable. Up to 128 outdoor units with up to
256 indoor units (or other units of the type ERV, AF-HB or AHU
SET) can be controlled via 4 XYE cables in total using an
optional expansion board. The outdoor and indoor units
communicate via the PQE protocol.
The central controller can be operated via 3 different user
levels or user roles:
•User
•Expert
•Administrator
Users with the role of “User” can control indoor units either
individually or as a group via the central controller. These users
can only perform the most important basic settings.
Users with the role of “Expert”, e. g. Facility Manager, can
access functions in the central controller such as grouping of
indoor units, user management, assignment of user roles and
advanced settings for time programs and diagnostics.
Persons with the “Administrator” user role have unrestricted
rights and can manage the rights of other users.
The central controller can be connected to a commercially-
available PC via a local network (LAN).
Additionally, a connection to building management systems of
third-party providers can be established via Modbus/TCP.
Connections, to fire-alarm call points or emergency flasher
systems for example, can be established via additional
interfaces such as digital inputs and outputs.1)
To protect against unauthorised access to the central controller
from the Internet:
▶ Use suitable firewall (Figure 1, page 6).
1) Function depends on which version of the central
controller is used

Product Information
Air Center Control – 6720892132 (2021/10)
6
System overview
Fig. 1 VRF system overview (schematic overview; the system configuration shown is only an example, not all options are shown;
the actual wiring/piping is not shown in this figure)
1) Functionality optional
2) Adaptor AC-CM for connection of outdoor units of the
type MDCI (some functions of these systems are
restricted)
3) Auto addressing is the default setting in the outdoor
units. However, this only leads to a successful system
scan if only a refrigerant system is connected.
If more than one refrigerant system is connected to an
XYE cable, the addressing must be carried out manually
in combination with unique IDU addresses.
4) The AHU set can be connected to an AHU (air handling
unit/ventilation unit). The AHU is a system component
which is not available from Bosch and must be sourced
from/provided by a third party.
0010024046-005
AF-SB AF-SB AF-SB
XYE
XYE
Air Flux Outdoor Units AF 6300
Slave
Slave
Master
Air Flux
Indoor
PQE
PQE
PQE
ERV
X1X2
ARC C-1
X1X2
ARC C-1
X1X2
ARC C-1
X1X2
ARC C-1
IR
ARC C IR
IR
ARC C IR
Internet PC Access
AHU KIT
AHU
AHU KIT
AF-HB
Air Center Control ACC MT
AC EXP
(via LAN)
Ethernet 1: LAN / WAN1
Modbus/RTU
XYE
XYE
XYE
XYE
PQE
ERV
Power Meter
IR
X1X2 X1X2
ARC H-1
ARC C-1
X1X2
ARC C-1 ARC C IR
1) 1)
1)
4)
MDCIMDCI
Refr.system n
Air Flux Outdoor Units AF 5300
Air Flux Outdoor Unit AF 5300
AC-CM
Refr.system n 2)
3)
3)
3) Slave
Slave
Master
Master
IR
X1X2 X1X2
ARC C-1ARC C-1 ARC C IR

Product Information
7
Air Center Control – 6720892132 (2021/10)
2.2 Compatible variable refrigerant flow system
components
The central controller is compatible with the following system
components:
• Air Flux outdoor unit AF 5300
• Air Flux outdoor unit AF 6300
• Air Flux indoor unit
• ERV ventilation unit
•HTHydroBoxAF-HB
•AirFluxAHUSET
• Expansion card for central controller AC EXP
• Room Controller VRF ARC C-1/H-1
• Variable refrigerant flow infra-red remote control ARC C IR
• MDCI outdoor unit
•AdaptorAC-CM
For more information on compatible variable refrigerant flow
system components Air Flux product catalogue.
2.3 Scope of delivery
Fig. 2 Scope of delivery of central controller
[1] Variable refrigerant flow central controller with touch
screen
[2] Wall mounting bracket
[3] Power source for central controller with country-specific
adapter
[4] Installer Guide
[5] 1 × Digital terminal I/O
[6] 1 × XYE terminal
[7] 1 × Power source terminal
[8] 2 × Insert for cable feed, each with 2 fixing screws
[9] USB stick with open source information
(open source information also available at
https://www.bosch-thermotechnology.com/global/)
[10] Ferrite (only included in scope of delivery for units with
the part number 8733502082)
The expansion card AC EXP is not included in the scope of
delivery.
2.4 Status LED indication
The front top right-hand side of the VRF central controller
(Figure 2, [1], page 7) has a status LED indicator.
Thisindicatesthe currentoperatingor faultstatusof the central
controller:
Table 2 Status LED indication
0010023914-003
4
123
7 68
10 9 5
Status display LED Description
Solid white Nofaultsare present. Starting
procedure of the central
controller is complete.
Flashing white Starting procedure of the
central controller in progress.
Solid red System fault is present (more
information is shown on the
display). Central controller is
in operation.
Flashing red Afault is present in thecentral
controller.

Product Information
Air Center Control – 6720892132 (2021/10)
8
2.5 Dimensions
Fig. 3 Dimensions (in mm)
0010023910-002
271
188
42
10,1"
R 6,6
R 2,5
R 105,1
R 100
(4x)
(2x)
(16x)
R 56
(2x)

Product Information
9
Air Center Control – 6720892132 (2021/10)
2.6 Connections and control elements
The PoE+ (Power over Ethernet) function is not available for
devices with the part number 8733502082.
2.6.1 Connections on reverse side without AC EXP
Fig. 4 Connections on rear (without AC EXP expansion board for ACC MT central controller; shown without cover)
[1] Slot for Micro SD card (insert card into the slot below the
marking in the holder with the contacts facing upwards
and pointing towards the marking)
[2] XYE 1
[3] Digital I/O
[4] Factory-Reset (default setting) with LED
[5] Ethernet 1 incl. PoE+ WAN + LAN
[6] DCin power supply
[7] Screw (locking device of central controller on wall
mounting bracket)
Notice: When inserting the Micro-SD card, make sure it is
actually in the slot and is not being pushed throughunderneath
it on the bottom panel.
If an AC EXP expansion board is used, it must be removed in
order to access the slot for the Micro-SD card.
0010024444-002
76
234 51

Product Information
Air Center Control – 6720892132 (2021/10)
10
2.6.2 Restore default setting of central controller
When the default setting of the central controller is restored, all
configurations and settings are reset to the delivered condition.
To restore the default setting of the central controller:
▶ Press and hold Factory-Reset [Fig. 4, Item 4].
The LED next to the pushbutton flashes after roughly
5seconds.
▶ Briefly release the Factory-Reset while LED is flashing.
▶ Press Factory-Reset again and hold for at least 5 seconds
while the LED is flashing.
The LED lights up continuously. The central controller has
now been reset to the default setting.
2.6.3 Connections on reverse side (AC EXP only)
Fig. 5 Connections on rear (only AC EXP expansion board connections for ACC MT central controller; shown without cover)
[8] Analogue I/O
[9] Ethernet 2 Modbus/TCP
[10] XYE 2
[11] XYE 3
[12] XYE 4
[13] Modbus/RTU
0010024445-002
8 9
10111213