Toshiba MM-A0224HT, MM-A0280HT, MM-A0280HX SERVICE MANUAL
Modular Multi VRF System
Applications Manual
MMS-04AE-07-03
Contents Page Chapter
General Information 5 1
Indoor Units – General 15 2
4-Way Cassette 19 3
2-Way Cassette 29 4
Duct 33 5
Slim Duct 37 6
Ceiling 41 7
High Wall 45 8
Chassis 49 9
Low Wall 53 10
Capacity Correction 57 11
Outdoor Units 71 12
Piping Design 85 13
Controls 98 14
Electrical Wiring 113 15
Selection Example 120 16
Commissioning Procedure 132 17
4
General Information
1
Introduction
1
With the new Modular Multi System (MMS),
Toshiba once again demonstrate that we are in
touch with tomorrow. The design team looked to
the future to develop a highly efficient,
environmentally friendly system, with state of the
art controls.
Linking the precision performance of their leading
inverter technology with the functionality of fixed
speed units,Toshiba have created a range of
systems from 22.4 to 128.8 kW (8 to 46 hp). The
inverter unit adjusts performance to match the
desired output as each fixed speed unit operates
as needed.
Modular Multi 2 pipe, heat pump and cooling only
systems provide an economical solution to many of
your heating and cooling needs and when
combined with the Super Multi 3 pipe system,
Toshiba covers the full spectrum of VRF
applications.
5
General Information
Benefits of VRF
The Variable Refrigerant Flow (VRF) product
segment is one of the fastest growing areas of
the air conditioning industry due to the inherent
flexibility of the system.
Specifiers are selecting this type of air
conditioning product because it provides the
economy and stability of a network system with
the versatility of an independent system.
The system is ideal for variable load situations
such as hotels, offices and shops.
VRF systems are compact and discreet which
makes them ideal for applications when the air
conditioning system is being retro-fitted to the
existing building.
Since the air is conditioned locally there is no
need for large ductwork throughout the building
for the flow of heated/cooled air. Only small
pipes are necessary to carry the refrigerant to
the desired location. Because the air is cooled
to the desired temperature at the point of use,
the end user gets rapid, precise temperature
control.
When integrated with control systems the
performance can be optimised to achieve ultra
low energy consumption, particularly when
there is high diversity in the capacity demand.
Qualifies for enhanced
Capital Allowance
As a variable-speed drive system this product is on
DEFRA’s Energy Technology Product list and
entities the purchaser in the UK to a tax benefit
under the ECA scheme, Further details are on the
following website: www.eca.gov.uk
6
General Information
Benefits of the Modular Multi System
Environmentally Compatible
HFC Refrigerant
Toshiba is committed to designing and
manufacturing products that will not harm our
environment. All of our European air conditioning
products use HFC refrigerants that have zero ozone
depletion potential.
THE INVENTOR OF INVERTER-DRIVE AIRCON TECHNOLOGY
1
Energy Efficiency
The inverter system reduces the energy
consumption by adjusting output to match capacity
demands.Toshiba’s research team has led the way
in the development of inverter technology and
continues to deliver products that are best in class.
Refrigerant Detection and Containment
System (RDC)
As an additional precaution an optional refrigerant
detection system is available. This senses the air
quality within a room and if refrigerant levels
exceed preset limits, it will emit an audible alarm
and transmit a signal that can activate auxiliary
valves, isolating the indoor unit from the system
and preventing further leakage to the environment.
TM
7
General Information
Benefits of the Modular Multi System
1
4
Intelligent
Refrigerant Distribution System
Internal controls within each indoor unit monitor and manage the refrigerant flow through the system to
optimise the distribution of refrigerant across the running units.This ensures consistent performance from
all indoor units regardless of the number of units in service or the resistance of the piping network.
Pressure and Temperature Sensor Control
• Checks pressure and refrigerant temperature of each indoor unit for optimal capacity control.
8
General Information
Benefits of the Modular Multi System
Interactive Controls
The system is available with Interactive Intelligence,
Toshiba’s range of sophisticated controls.The userfriendly software with a Windows® based platform allows
management of up to 1,024 indoor units (up to 64 zones
with 16 units per zone).The entire air conditioning
network can be programmed to meet the end user’s
needs.These controls are interactive; two-way
communication enables your system to send you regular
updates through the internet via your PC or mobile
telephone. Service engineers can be notified of system
status and any necessary action can be taken before it
becomes evident to the user.
1
Up to 64 zones (allowing up
to 16 units per zone)
Energy Monitoring
• The power consumption of each individual indoor
unit can be monitored allowing energy bills for
shared systems to be sub-divided across multiple
occupants.
• Building managers can identify high-use systems
and investigate potential opportunities for energy
savings.
• An energy meter connected to each outdoor system
measures its usage (kW/h) and the energy
consumption is proportioned to the indoor units
based on their capacity demand.
•A billing package is already included with the
software, which allows billing on a multiple-tariff
basis.
Up to 16 gateway
interfaces
Internet Access
This feature is ideal for building management services with more than one site.
• Remote monitoring and control is possible for multiple users at any one time using Microsoft Internet
Explorer®
• Various levels of access are permitted for security
•Immediate access to operating conditions and historical performance. Allows rapid response to user
enquiries.
Diagnostics
The network can also be linked to DD III,Toshiba’s system interrogation software allows the service
engineers to gain access to critical system parameters to monitor the functions of the unit.
9
General Information
Benefits of the Modular Multi System
6
Reliable
Toshiba Quality
Toshiba’s reputation for quality has been established over 125
years of delivering reliable products.We maintain the highest
standards in every aspect of our business, to ensure total
customer satisfaction and continuously search for new ways in
which to improve our customer offering.Toshiba believe in
listening to customers, and working with them to make our
products and services the very best they can be.
Reliability by Design
Toshiba uses the latest techniques and analysis tools to build reliability into the products and the
processes from the very outset. Our products are built to last and serve you well beyond the minimum
specification requirements.
Oil Management System
The MMS has an oil-balancing network to ensure the oil is evenly distributed across the outdoor units;
thereby extending the life of the product.This system is outlined in greater detail in chapter 12.
Diagnostics
Our advances in control and monitoring equipment have produced state of the art system maintenance,
designed to minimise downtime. Interactive Intelligence and DD III allow the end user to monitor trends in
performance data that might signal that action should be taken.
10
General Information
Benefits of the Modular Multi System
7
Versatile
8F
7F
6F
5F
Maximum length
after first branch
50m
Maximum piping length
100m
Design Flexibility
The unique refrigerant distribution control allows for a wide variety of piping options:
• Up to 40 indoor units per system
4F
3F
2F
1F
between indoor units
Maximum height difference
30m 50m
outdoor and indoor units
Maximum height difference b/w
1
• Allowable height difference between indoor and outdoor units 50 m (outdoor unit above) or 30 m
(outdoor unit below)
• Up to 30 m height difference between indoor units
• Equivalent length of 125 m (100 m actual) between outdoor unit and furthest indoor unit
• Vertical distance of up to 4m permitted between outdoor units
• Total pipework network of up to 250 m
Piping Possibilities
The indoor unit network can be designed with Y-joints after headers and headers after headers.
The possibilities are endless thanks to the refrigerant distribution system that compensates for the
variation in pipe resistance and balances the flow across the entire network.
Y joint branch after header branch
(Toshiba unique technology)
Header branch after Y joint
Header branch after header branch
(Toshiba unique technology)
Expandability
The system is modular so it can be expanded as needed. Installations can also be staged to allow
sequential installation. This is ideal for refurbishment situations when disruption of business operation
must be minimised. It also allows for flexibility should the floor layout be modified at a later date.
11
General Information
Benefits of the Modular Multi System
8
Economical
Installation Savings
There are potential installation savings with the MMS, due to the additional network piping possibilities
and the reduction in the number of pipes connecting the outdoor units to the indoor network.
Capacity Range
The variation of outdoor unit combinations allows MMS to meet system capacity demands from 22.4 to
128.8 kW (8 to 46 hp) in nineteen increments. This allows the system capacity to match your exact
needs, reducing product costs.
General Information
Overview of the 19 Modular Multi System Configurations
OUTDOOR SYSTEM INVERTER FIXED Total connected code
CAPACITY 28 kW (10 hp) 22.4 kW (8 hp) 28 kW (10 hp) 22.4 kW (8 hp) 16 kW (6 hp) Maximum No.
Cooling only (no heating) Code MM-A0280CT MM-A0224CT MM-A0280CX MM-A0224CX MM-A0160CX of indoor
Cooling Heating* hp MM-A0280HT MM-A0224HT MM-A0280HX MM-A0224HX MM-A0160HX units Min Max
22.4 25.0 8 1 13 4 10.8
28.0 31.5 10 1 16 5 13.5
38.4 43.0 14 1 1 16 7 18.9
44.8 50.0 16 1 1 18 8 21.6
50.4 56.5 18 1 1 18 9 24.3
56.0 63.0 20 1 1 20 10 27.0
60.8 68.0 22 1 1 1 22 11 29.7
67.2 75.0 24 1 2 24 12 32.4
72.8 81.5 26 1 2 26 13 35.1
78.4 88.0 28 1 1 1 28 14 37.8
84.0 94.5 30 1 2 30 15 40.5
89.6 100.0 32 1 3 32 16 43.2
95.2 106.5 34 1 3 34 17 45.9
100.8 113.0 36 1 1 2 36 18 48.6
106.4 119.5 38 1 2 1 38 19 51.3
112.0 126.0 40 1 3 40 20 54.0
117.6 131.5 42 1 4 40 21 56.7
123.2 138.0 44 1 1 3 40 22 59.4
128.8 144.5 46 1 2 2 40 23 62.1
* Heating capacities only apply to heat pump systems
Conditions
The capacities are based on Eurovent conditions:
Cooling: Indoor air entering temperature 27°C db,
19°C wb, outdoor air temperature 35°C db
Heating: Indoor air entering temperature 20°C db,
outdoor air temperature 7°C db, 6°C wb
Unit operating range
Indoor Outdoor
Cooling Cooling
Maximum: 32°C db, 22.5°C wb Maximum: 43°C db
Minimum: 18°C db, 15.5°C wb Minimum: -5°C db
Relative humidity:
Maximum: 80%
Heating:
Maximum: 29°C
Minimum: 15°C
12
990 mm
1700 mm
750 mm
General Information
Benefits of the Modular Multi System
Small Riser Space
Example for a 84 kW (30 hp) system
1
9
11
50% Reduction in Riser Space
Space Saving, Compact Design
The compact Modular Multi outdoor units have a small footprint so they can fit into tight working spaces,
thus freeing premium floor space for other usage. A single set of pipes connects the outdoor series to the
indoor unit network, minimising the riser space required.
1
Example for a 84kW (30HP) system
Smaller
than
competitors
300mm
10mm 20mm 20mm
500mm
3.03m
Units will fit in 90% of the world's lifts
1.55m
10mm
13
General Information
Benefits of the Modular Multi System
Applying the Modular Multi System is easy. The following flowchart outlines the basic steps of the
process, which are typical for almost all air conditioning applications.This manual is structured with
separate chapters focusing on each of the steps along with a separate chapter on each type of indoor
unit.We have also included a chapter which outlines an example of an MMS application.
As with all air conditioning applications, proper zoning is important.
Zoning
Indoor units connected to a common system should have similar
loading characteristics, thus minimising the potential for conflicting
demand.
Indoor unit
selection
Capacity
correction
Outdoor unit
selection
Piping design
Indoor units are selected based on the predicted heat load as well
as the style and layout of the space to be air conditioned. Air
distribution and sound level characteristics may also be factors for
consideration.
Indoor unit capacity will be adjusted based on the expected length
and height of pipe runs and environmental conditions.
The outdoor unit capacity is then determined, based on the
expected demand.This is calculated by summing the capacity of the
indoor network and predicting the peak load.
The piping network for the indoor units will be based on the zoning
requirements and building layout. Numerous options are available
due to the flexibility of the system.
Controls selection
Wiring design
14
The controls selection is dependent on the specification. Toshiba
has a wide range of control systems available and has collaborated
with customers on the development of unique systems to meet
specific application requirements.
Each of the indoor and outdoor units will have its own power supply.
Control wiring requirements will be determined by the controls
selection.
Indoor units
Intelligent Indoor Units
11
The Modular Multi System indoor units are compatible with both the Cooling Only and Heat Pump outdoor
units. The MMS dedicated indoor range has precise capacity control.
Each MMS indoor unit has the following additional components:
• Pressure and temperature sensors to determine the superheat conditions of the refrigerant
•A pulsed modulating valve (PMV) to optimise refrigerant flow
•A printed circuit board to communicate system parameters and demand to the outdoor system
2
Temperature sensors
The added intelligence of the indoor units provides precise capacity control without a multi controller
unit. Localised sensing of the refrigerant conditions and internal controls provide excellent performance
in all conditions.The units compensate for the piping resistances allowing greater flexibility in piping
design. Communication between the indoor and outdoor network means greater performance and
efficiency as system output closely matches the demand of the indoor network.
Pulsed modulating valve
Pressure sensor capillary
Modular Multi System
Very good capacity control because of the indoor unit knows the exact superheat value through constant
monitoring of the coil temperature sensors and the pressure sensor. This allows the PMVs to adjust and
account for all resistance in the circuit and achieve the desired capacity.
Localised
• Pressure measurement
• Temperature measurement
• Refrigerant flow adjustment
System compensates for
high pipe resistance
15
Indoor Units
Model Type Model Capacity Cooling Heating Height Width Depth Weight
4-way Cassette* MM-U056 1.0 2.8 3.2 259 820 820 25
Concealed Duct MM-B056 1.0 2.8 3.2 345 770 875 39
2-way Cassette MM-TU028 0.8 2.2 2.6 190 910 480 23
High Wall* MM-K/KR042 0.8 2.2 2.6 372 1150 226 20
Ceiling* MM-C/CR042 0.8 2.2 2.6 188 1030 640 24
Floor Low Wall* MM-S/SR056 1.0 2.8 3.2 640 1030 188 24
Chassis MM-N028 0.8 2.2 2.6 600 750 230 21
Slim Duct MM-SB028 0.8 2.2 2.6 220 800 500 22
Name Code Capacity Capacity mm mm mm kg
kW kW
1.25 3.5 4.0
1.5 4.2 4.8
1.7 4.8 5.4
2.0 5.6 6.4
MM-U080 2.5 6.7 8.0
3.0 8.0 9.6
MM-U112 3.2 9.0 10.2 309 1230 820 43
4.0 11.2 12.8
MM-U140 5.0 14.0 15.8
1.25 3.5 4.0
1.5 4.2 4.8
1.7 4.8 5.4
2.0 5.6 6.4
MM-B080 2.5 6.7 8.0 345 1070 875 53
3.0 8.0 9.6
MM-B112 3.2 9.0 10.2 345 1420 875 58
4.0 11.2 12.8
MM-B140 5.0 14.0 15.8 345 1420 875 62
1.0 2.8 3.2
MM-TU042 1.25 3.5 4.0
1.5 4.2 4.8
MM-TU056 1.7 4.8 5.4
2.0 5.6 6.4
1.0 2.8 3.2
1.25 3.5 4.0
1.5 4.2 4.8
MM-K/KR056 1.7 4.8 5.4
2.0 5.6 6.4
MM-K/KR080 2.5 6.7 8.0 372 1478 226 26
3.0 8.0 9.6
1.0 2.8 3.2
1.25 3.5 4.0
1.5 4.2 4.8
MM-C/CR056 1.7 4.8 5.4
2.0 5.6 6.4
MM-C/CR080 2.5 6.7 8.0 188 1230 640 28
3.0 8.0 9.6
MM-C/CR 112 4.0 11.2 12.8 240 1430 640 39
MM-C/CR140 5.0 14.0 15.8 240 1630 640 44
1.25 3.5 4.0
1.5 4.2 4.8
1.7 4.8 5.4
2.0 5.6 6.4
MM-S/SR080 2.5 6.7 8.0 640 1230 188 28
3.0 8.0 9.6
1.0 2.8 3.2
MM-N042 1.25 3.5 4.0 600 1050 230 25
1.5 4.2 4.8
MM-N056 1.7 4.8 5.4 600 1050 230 29
2.0 5.6 6.4
MM-N080 2.5 6.7 8.0
3.0 8.0 9.6
1.0 2.8 3.2
* These units are available with infrared remote control. For the four-way cassette unit a separate infrared panel is required.
16
Indoor Units
De-rating
1. The Modular Multi indoor units have a de-rating option that can be implemented to match actual load
requirements.The full output range including the de-rated units is outlined in the table shown.
2. When an indoor unit is derated the initial opening pulse of the indoor unit PMV is adjusted according
to the capacity rating.
3a. In cooling code, the PMV pulse is then adjusted along with the inverter compressor frequency to
ensure optimum superheat conditions at each indoor unit.
3b. In heating mode, the PMV pulse is then adjusted along with the outdoor unit PMV & inverter
frequency to ensure the optimum subcooling condition at each indoor unit.
13
Total Cooling kW 2.2 2.8 3.5 4.2 4.8 5.6 6.7 8.0 9.0 11.2 14.0
Sensible Cooling kW 1.7 2.1 2.6 3.2 3.6 4.2 5.0 6.0 6.8 8.4 10.5
4-way Cassette
2-way Cassette
Duct/Slim Duct*
High Wall
Ceiling
Chassis
Floor/Low Wall
Heating kW 2.6 3.2 4.0 4.8 5.4 6.4 8.0 9.6 10.2 12.8 15.8
Capacity Code Setting 0.8 1.0 1.25 1.5 1.7 2.0 2.5 3.0 3.2 4.0 5.0
2
STANDARD CAPACITY SETTING OUTPUT ACHIEVED BY DE-RATING
* Slim Duct indoor unit available in 2.8 kW standard and 2.2 kW de-rated capacities
Note: Indoor unit system capacity may be between 50 and 135% of the connected outdoor units.
17
Indoor Units
Part Numbering
The indoor unit part numbering system is defined as follows:
MM - U 056
Product Designation
MM Modular Multi
Unit Type
B Duct
C Ceiling
FFloor
K High Wall
NChassis
SLow Wall
SB Slim Duct
TU 2-way Cassette
U 4-way Cassette
An R next to the unit
designation indicates a unit
with an infrared controls
option
Cooling Capacity (STD)
028 2.8 kW
042 4.2 kW
056 5.6 kW
080 8.0 kW
112 11.2 kW
140 14.0 kW
Location Precautions
Avoid installing the indoor unit in the following locations:
• Where there is danger of flammable gas leakages.
• Where there are high concentrations of oil.
• Where the atmosphere contains an excess of salt.
• Where high concentrations of organic solvent are present.
• Where a machine that generates high frequencies is operated.
• Where the unit will not be horizontal.
• Where the floor/wall/ceiling structure is unable to support the weight of the unit.
• Where it is not possible to fix the unit hangers, e.g. window glass.
Locate the unit to ensure uniform circulation of conditioned air.
18
• Slim design
• Highly efficient drain pump
Four-Way Cassette
• 2-, 3- and 4-way air distribution
• Ultra quiet
• Slim one-piece easy-to-clean panel
• Threaded drain connection as standard
• Long-life washable air filter
• Synchronised motor-driven louvres
• Fresh air intake facility
• Branch duct option
• Easy access to components
• Infrared controls option via panel RBC-UxxxPGR
•Modular Multi dedicated indoor unit. Monitors pressure and temperature and adjusts refrigerant flow
to optimise performance locally.
3
MODEL MM-U056 MM-U080 MM-U112 MM-U140
Cooling Capacity kW 2.8 3.5 4.2 4.8 5.6 6.7 8.0 9.0 11.2 14.0
Heating Capacity kW 3.2 4.0 4.8 5.4 6.4 8.0 9.6 10.2 12.8 15.8
Capacity Code 1.0* 1.25* 1.5* 1.7* 2.0 2.5* 3.0 3.2* 4.0 5.0
Sensible Cooling kW 2.1 2.6 3.2 3.6 4.2 5.0 6.0 6.8 8.4 10.5
Airflow Rate H m3/h 1020 1020 1020 1020 1020 1260 1260 1750 1750 1860
Airflow Rate M m3/h 890 890 890 890 890 1140 1140 1520 1520 1620
Airflow Rate L m3/h 830 830 830 830 830 1020 1020 1360 1360 1510
Unit Weight kg 25 25 25 25 25 25 25 43 43 43
Height mm 259 259 259 159 259 259 259 309 309 309
Width mm 820 820 820 820 820 820 820 1230 1230 1230
Depth mm 820 820 820 820 820 820 820 820 820 820
Air Filter Washable, 500 µm
Gas Connection mm ø12.7 (1/2”) ø15.9 (5/8”) ø19.0 (3/4”) ø19.0 (3/4”)
Liquid Connection mm ø 6.4 (1/4”) ø 9.5 (3/8”) ø 9.5 (3/8”) ø 9.5 (3/8”)
Drain Connection mm Male 25.4 (1” BSP)
PANEL TYPE RBC-U264PG/PGR**(W)-E RBC-U464PG/PGR**(W)-E
Air Filter Washable - 500 µm Washable - 500 µm
Panel Weight kg 6 6666 66 88 8 8
Panel Height mm 20 20 20 20 20 20 20 20 20 20 20
Panel Width mm 940 940 940 940 940 940 940 1350 1350 1350 1350
Panel Depth mm 940 940 940 940 940 940 940 940 940 940 940
* Setting shown is de-rated and adjustment must be made during installation/commissioning.
** Panel with R designation has infrared controls
19
Four-Way Cassette
1.5m
Microphone
Acoustic Data
MM-U056 Sound Power Level (SWL) - dB Pressure Level
125 Hz 250 Hz 500 Hz 1000 Hz 2000 Hz 4000 Hz 8000 Hz SWL SPL (dBA) NC*
Low 38.3 36.5 27.7 24.8 21.9 16.1 16.5 37.5 32 22
Med 39.5 38.8 30.2 28.7 23.3 16.4 16.6 39.7 35 24
High 41.1 41.2 33.6 32.6 26.4 18.7 17.8 42.7 38 29
MM-U080
125 Hz 250 Hz 500 Hz 1000 Hz 2000 Hz 4000 Hz 8000 Hz SWL SPL (dBA) NC*
Low 40.5 40.8 33.1 35.7 28.4 20.0 21.5 42.9 35 32
Med 43.1 45.4 38.1 36.9 30.4 22.5 21.9 46.4 39 33
High 44.0 48.1 40.7 39.4 32.6 25.0 21.3 48.9 43 36
MM-U112
125 Hz 250 Hz 500 Hz 1000 Hz 2000 Hz 4000 Hz 8000 Hz SWL SPL (dBA) NC*
Low 45.4 41.6 37.7 33.1 26.0 18.9 20.1 44.4 37 29
Med 50.4 44.1 40.6 37.1 30.0 21.8 20.2 47.4 40 34
High 52.6 44.9 41.5 38.5 31.5 23.8 20.5 48.6 42 35
MM-U140
125 Hz 250 Hz 500 Hz 1000 Hz 2000 Hz 4000 Hz 8000 Hz SWL SPL (dBA) NC*
Low 47.8 45.7 42.9 36.5 29.6 25.1 19.1 47.7 40 33
Med 51.8 46.8 45.7 40.0 32.0 26.0 19.8 50.0 43 36
High 52.8 47.4 45.6 40.5 32.9 26.8 19.9 50.6 45 37
* For all practical purposes NR and NC curves may be regarded as mutually interchangeable. (Ref: CIBSE Guide Vol. B, page12-4. )
Sound
MM-U056
50
40
30
20
10
Sound Pressure Level dB(A)
0
125 250 500 1000 2000 4000 8000
Frequency (Hz)
MM-U112
50
40
30
20
10
Sound Pressure Level dB(A)
0
125 250 500 1000 2000 4000 8000
Frequency (Hz)
NC-40
NC-30
NC-20
NC-10
NC-40
NC-30
NC-20
NC-10
MM-U080
50
40
H
M
L
30
20
10
Sound Pressure Level dB(A)
0
125 250 500 1000 2000 4000 8000
NC-40
NC-30
NC-20
NC-10
H
M
L
Frequency (Hz)
MM-U140
50
40
H
M
L
30
20
10
NC-40
NC-30
NC-20
NC-10
H
M
L
Sound Pressure Level dB(A)
0
125 250 500 1000 2000 4000 8000
Frequency (Hz)
20
Four-Way Cassette
Air Distribution Control
Conditioned air can be distributed through 2, 3 or 4 sides of the unit to optimise the flow distribution in a
room. Insulation blocks are included with the unit to close off the airflow to certain sides of the unit.The
diagram below defines which sides of the unit may be closed for each of the capacities.
Choose the number of airflows that are required, depending on the shape of the room and the location of
the indoor unit.
MM-U056/U080
3-way 3-way 3-way
3-way 2-way 2-way
• It is not possible to block the airflow from the
longer sides of the unit (U112/U140).
• Insert insulation blocks, which are supplied as
accessories, at each side where the airflow is
not required as shown in the diagram
opposite.
MM-U112/U140
3-way 3-way 2-way
Insulation Block
3
In addition, a motorised louvre facility allows the air to be directed in either a pre-set or a sweep pattern.
Cassettes also have a branch duct facility for better air distribution in irregular shaped rooms.The
combination of these two features gives the occupants total control over air movement within the room,
via an easy-to-use remote controller.
21
Four-Way Cassette
Air Distribution
Note: Air velocity data collected at high fan speed.
MM-U056
MM-U080
Air velocity (m/s)Air velocity (m/s)
2.7m
2
Height (m)
0112
MM-U112
1.0
0.5
0.3
Distance (m)
3
0.1
45
2.7m
2
Height (m)Height (m)
0112
MM-U140
1.0
0.5
0.3
Distance (m)
3
0.1
45
Air velocity (m/s) Air velocity (m/s)
2.7m
2
Height (m)
0112
1.0
0.5
0.3
3
0.1
45
2.7m
2
0112
1.0
0.5
0.3
3
0.1
45
Distance (m)Distance (m)
Design Features
Flexible Air Distribution
Conditioned air can be distributed through 2, 3 or 4 sides of the unit. In addition, a motorised louvre
facility allows the air to be directed in either a pre-set or a sweep pattern. Cassettes also have a branch
duct facility for better air distribution in irregular shaped rooms.The combination of these two features
gives the occupants total control over air movement within the room via an easy-to-use remote controller.
Fresh Air Facility
An additional advantage of Toshiba’s 4-way cassettes is that outdoor air, as well as conditioned air, can
be introduced into the room. (Tempering to 15°C minimum is recommended.)
Quiet Operation
Noise levels have been reduced dramatically, thanks to the specially designed fan inlet that smoothes the
airstream as it flows into an aerofoil fan and aerodynamic louvres.
Performance Tuning
Units are preset to a standard setting, however capacity code adjustments can be made to optimise
cooling or heating.
Precise Capacity Control
Each indoor unit has pressure and temperature sensors for localised monitoring of refrigerant condition. A
pulsed modulating valve (PMV) controls the refrigerant flow and the capacity demand is communicated to
the outdoor system. This ensures excellent performance at all conditions. A 3-speed fan controls the
cooled airflow volume automatically or manually (4-speed heating mode). Even at the highest fan speed,
the unit is quiet in operation.
Easy to Install and Maintain
The 4-way cassette can be concealed within most ceiling voids, with an ultra-thin 20 mm grille. This onepiece panel is easy to install. Its surface is easy to wipe clean, a feature it shares with the synchronised
louvre blades.The long-life washable filter also minimises maintenance.
22
Ceiling
195
246.5
106
Hanging bolts 4-M10
106
298
138
160
259
30
39
20
Knockout for side ducts ø150 (both sides)
30
40
536
405
400
268195
800 (Hanger bolt pitch)
820 (External cassette dimension)
880 (Ceiling opening)
940 (P anel dimension)
Condensate pipe 1 ″ BSP
threaded connection
536
620 (Hanger bolt pitch)
820 (External cassette dimension)
880 (Ceiling opening)
940 (Panel dimension)
130
30
F
resh air inlet
940
940
80
240
138
185
170
100
73
140
200
Refrigerant flare connection
(Gas øA)
Refrigerant flare connection
(Liquid øB)
Wiring connection
(Gland plate 3x ø20 holes)
Drain pipe connection
(25.4mm BSP threaded connection)
Model (MM-)
U056 U080
øA
øB
12.7(1/2)
6.4(1/4)
15.9(5/8)
6.4(1/4)
45¡
45¡
ø180
Side outlet duct size
6 - ø 6
ø180
45¡
45¡
80
10
30
6
ø150
ø200
32
130
130
ø100
4 - ø 6
ø130
ø144
Fresh air inlet duct size
80
10
30
2
ø97
ø30
ø144
MM-U056, MM-U080
Four-Way Cassette
Dimensional Drawings
3
Note: All dimensions are in mm.
Dimensions MM-U056 MM-U080
mm
ø A 12.7 (1/2”) 15.9 (5/8”)
ø B 6.4 (1/4”) 6.4 (1/4”)
23
MM-U112, MM-U140
45¡
45¡
ø180
Side outlet duct size
6 - ø 6
ø180
45¡
45¡
80
10
30
6
ø150
ø200
32
130
130
ø100
4 - ø 6
ø130
ø144
Fresh air inlet duct size
80
10
30
2
ø97
ø30
ø144
Ceiling
Ceiling panel
30
202
246.5
941
106
210
348
309
138
30
39
20
106
Knock out for side ducts ø 150 (both sides)
40
30
610
605
800 (Hanger bolt pitch)
820 (External cassette dimension)
880 (Ceiling opening)
940 (P anel dimension)
Condensate pipe 1
″ BSP
threaded connection
940
1030 (Hanger bolt pitch)
1230 (External cassette dimension)
1290 (Ceiling opening)
1350 (Panel opening)
30
130
Fresh air inlet
940
1350
80
240
138
185
170
100
73
140
200
Refrigerant flare connection
(Gas side 19(3/4))
Refrigerant flare connection
(Liquid side 9.5(3/8))
Wiring connection
(Gland plate 3x ø20 holes)
Drain pipe connection
″ (25.4mm BSP threaded connection)
Hanging bolts 4-M10
Four-Way Cassette
Dimensional Drawings
15 mm or more
Ceiling
1000 mm or more
Obstacle
Note: All dimensions are in mm.
1000 mm
or more
1000 mm
or more
24
Four-Way Cassette
Drain Piping
Precautions
Ensure that the entire indoor drain piping is correctly heat-insulated otherwise condensation may result.
Also, insulate the section which connects it to the indoor unit.
If nylon cable ties are used to secure the insulation, take precautions not to over-tighten them because
deformation of the heat insulation will reduce its effectiveness.
Ta ke care not to apply excessive force or pressure at the unit side where the drain piping exits the indoor
unit.
The drain piping must be placed on a downward gradient (1/100 or greater) and there should be no
upward or downward curves in the pipe which obstruct the drainage, unless a drain pump is employed.
The drain pipe should be sufficiently supported to prevent warpage.
When one drainage system is used for a multiple of indoor units, install the piping as shown below:
15-20 m
Insulator
Downward gradient 1/100 or greater
Upward curve
Support clamp
X
Downward curve
Make this distance as long as possible – approx. 100 mm
Downward gradient 1/100 or greater
Piping Material and Heat Insulator
3
Heat Insulator*
Drain pan Drain hose Hard PVC adhesive
Connection to the unit is via a 1” BSP male
connection – to ensure a waterproof seal, PTFE
thread tape should be used.The maximum lift of
the condensate pump from the drain outlet is 360
mm and the maximum overall lift from the
underside of the ceiling to the centre of the drain
piping is 600 mm.These values must not be
exceeded, otherwise unit flooding will occur when
the drain pump is switched off.
Hard PVC pipe**
* Heat Insulator:
Polyethylene foam (thickness 6 mm)
** Piping Material:
Hard PVC pipe nominal diameter inside Ø20 mm
100 mm
(max.)
Cassette
Ceiling
360 mm (max.)
600 mm (max.)
25
Four-Way Cassette
Fresh Air Inlet
These models have a cut out hole in the cabinet to enable outdoor air to enter the indoor unit at a
maximum rate of 10% of selected air by volume. Before installing the unit, remove the cut out hole and
insulation block and fit a spigot to connect the duct before hanging the unit. (Tempering incoming air to
15°C minimum is recommended.)
Details of Cut-Out Hole
The cut out hole is a ‘D’ shape half-cut hole on the side of the indoor unit, located on the side opposite the
pipework.
Drain Pan
Insulation Block
Fresh Air Inlet
Add a spigot to the side of the indoor unit and attach using the 4 screw holes as shown below:
32
130
130
ø100
ø144
ø130
4-ø6
80
10
ø97
30
2
ø130
ø144
Note: All dimensions are in mm.
26
Four-Way Cassette
Air Outlet Duct
A portion of airflow can be redirected via the air outlet duct. Before installing the unit, remove the cut out
hole and fit a spigot to connect the duct before hanging the unit.
Details of Cut-Out Hole
The cut out hole is a rectangular shape half-cut hole located on two sides if the unit.
3
Air outlet duct
Add a spigot to the side of the indoor unit and attach using the 6 screw holes as shown:
6-ø6
45°
45°
ø 180
45°
ø180
45°
Air Outlet Spigot (ø150)
ø150
80
10
ø200
30
6
Note: All dimensions are in mm.
27
28
Two-Way Cassette
• Designed and developed for use with the nonozone depleting refrigerant, R407C
• Quiet in operation
• Adjustable air distribution
• Compact – 190 mm void space required
•Motorised louvres
• Ideal for refurbishment and new build
• Easy to install and maintain
• Slim-line grille (25 mm)
•Modular Multi dedicated indoor unit. Monitors
pressure and temperature and adjusts
refrigerant flow to optimise performance
locally.
4
MODEL MM-TU028 MM-TU042 MM-TU056
Cooling Capacity kW 2.2 2.8 3.5 4.2 4.8 5.6
Heating Capacity kW 2.6 3.2 4.0 4.8 5.4 6.4
Capacity Code 0.8* 1.0 1.25* 1.5 1.7* 2.0
Sensible Cooling kW 1.7 2.1 2.6 3.2 3.6 4.2
Airflow Rate H m3/h 550 550 700 700 750 750
Airflow Rate M m3/h 500 500 635 635 681 681
Airflow Rate L m3/h 445 445 567 567 607 607
Weight kg 23 23 23 23 23 23
Height mm 190 190 190 190 190 190
Width mm 910 910 910 910 910 910
Depth mm 480 480 480 480 480 480
Air Filter Washable - 500 µm Washable - 500 µm Washable - 500 µm
Gas Connection mm ø12.7 (1/2") ø12.7 (1/2") ø12.7 (1/2")
Liquid Connection mm ø6.4 (1/4") ø6.4 (1/4") ø6.4 (1/4")
Drain Connection mm ø25.5 OD ø25.5 OD ø25.5 OD
PANEL TYPE RBC-U134PG(W)-E RBC-U134PG(W)-E RBC-U134PG(W)-E
Panel Dimensions
Height mm 25 25 25 25 25 25
Width mm 1050 1050 1050 1050 1050 1050
Depth mm 550 550 550 550 550 550
Unit Weight kg 23 23 23 23 23 23
Panel Weight kg 4.5 4.5 4.5 4.5 4.5 4.5
Panel Depth
Below Ceiling mm 25 25 25 25 25 25
Panel Colour Silky White (Munsell 2.9Y8.9/0.8)
Air Filter Washable
29
Two-Way Cassette
1.5m
Microphone
Acoustic Data
MM-TU028 Sound Power Level (SWL) - dB Pressure Level
Low 31.0 35.3 30.5 24.6 20.0 19.8 21.3 37.1 34 25
Med 31.5 36.9 35.2 27.5 21.3 19.2 21.4 39.0 36 25
High 38.0 41.1 38.5 35.7 26.6 20.6 22.0 45.0 40 32
MM-TU042
Low 25.5 36.8 33.2 29.6 23.6 21.4 21.7 39.8 34 25
Med 29.7 39.7 35.5 33.1 26.1 21.9 21.7 42.6 36 29
High 35.5 43.1 39.4 39.0 32.0 23.9 20.8 47.3 40 35
MM-TU056
Low 27.0 36.7 33.9 34.2 24.6 20.6 21.1 41.6 35 31
Med 29.8 38.8 35.0 35.8 25.6 19.0 17.8 43.1 37 32
High 36.0 42.5 38.9 40.4 31.1 23.2 18.8 47.7 41 36
* For all practical purposes NR and NC curves may be regarded as mutually interchangeable. (Ref: CIBSE Guide Vol. B page B12-4.)
125 Hz 250 Hz 500 Hz 1000 Hz 2000 Hz 4000 Hz 8000 Hz SWL SPL (dBA) NC*
125 Hz 250 Hz 500 Hz 1000 Hz 2000 Hz 4000 Hz 8000 Hz SWL SPL (dBA) NC*
125 Hz 250 Hz 500 Hz 1000 Hz 2000 Hz 4000 Hz 8000 Hz SWL SPL (dBA) NC*
MM-TU028
50
40
30
20
NC-40
NC-30
NC-20
H
M
L
MM-TU042
50
40
30
20
Sound
NC-40
NC-30
NC-20
H
M
L
10
Sound Pressure Level dB(A)
0
125 250 500 1000 2000 4000 8000
Frequency (Hz)
MM-TU056
50
40
30
20
10
Sound Pressure Level dB(A)
0
125 250 500 1000 2000 4000 8000
Frequency (Hz)
NC-10
NC-40
NC-30
NC-20
NC-10
10
NC-10
Sound Pressure Level dB(A)
0
125 250 500 1000 2000 4000 8000
Frequency (Hz)
H
M
L
30
Two-Way Cassette
480
290
80
110
190
70
840
Hanger bolt
(4-M10)
A
190
25
Drain pipe joint
ø 25.5
Refrigerant flare connection
(Liquid ø6.4(1/4))
Refrigerant flare connection
(Gas ø12.7(1/2))
131
131
96
156
170
267
186
Wiring connection
66
73
Panel outer dimension 1050
Ceiling opening 1010
Hang bolt pitch 930
Unit dimension 840
20
40
70
40
20
40
110
90
Panel outer dimension 550
Ceiling opening 510
Unit dimension
480
Hang bolt pitch 410
TOSHIBA
1050
550
600
Minimum
600
Minimum
600
Minimum
200
Space required for service and installation
Vie w A
Dimensional Drawings
MM-TU028, MM-TU042, MM-TU056
4
Note: All dimensions are in mm.
31
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