Airwell MD Series Owner's manual

Multi-duct cassette units
INDIVIDUAL COMFORT RANGE
Technical instructions manual
TM03MD1 GB ATM03MD1 GB A
TM03MD1 GB ATM03MD1 GB A
TM03MD1 GB A
Cancels and replaces :
MD
Cooling capacity (W) Heating capacity (W)
MD 35 1~230 V - 50 Hz 9100 9140
MD 38 11260 11100
MD 35
3N~400 V - 50 Hz
8790 8790
MD 38 10400 11100
MD 50 12600 14500

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MD Multi-duct cassettes
MD Multi-duct cassettes
CONTENTS
PRESENTATION ................................................................................. 3
TECHNICAL SPECIFICATIONS ............................................................ 5
OPERATING LIMITS ........................................................................... 6
COOLING CAPACITY ........................................................................ 7
HEATING CAPACITY .......................................................................... 10
COOLING MODE POWER INPUT. ..................................................... 13
HEATING MODE POWER INPUT ........................................................ 16
DIMENSIONS
• MD Indoors unit .............................................................................. 19
• GC Outdoors unit ........................................................................... 20
INSTALLATION
• MD Indoors unit .............................................................................. 22
• GC Outdoors unit ........................................................................... 25
AIR DISTRIBUTION ............................................................................ 26
NEW AIR INTAKE (option) ................................................................... 28
AERAULIC CHARACTERISTICS ............................................................ 29
CONDENSATES DRAINAGE ............................................................... 31
REFRIGERATION CONNECTIONS ...................................................... 32
REFRIGERANT CHARGE ..................................................................... 33
ELECTRICAL SPECIFICATIONS............................................................ 34
ELECTRICAL CONNECTIONS
• Controller board ............................................................................. 36
• Single phase units ........................................................................... 37
• Three phase units ............................................................................ 38
INFRARED RECEIVER .......................................................................... 39
RC4 INFRARED REMOTE CONTROL ................................................... 41
RCW-2 wall mounted remote control ................................................... 42

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MD Multi-duct cassettes
MD Multi-duct cassettes
PRESENTATION
These units are optimised for operating with chlorine-free R-407C refrigerant
having no harmful effects on the ozone layer and they meet the requirements of
both current legislation and of care for the environment.
The «Multi-Duct Cassettes» range meets the air conditioning needs of all
sizes of residential and tertiary installations.
The 3 models, with capacities ranging from 8790 to 14500 W, comprise two
separate elements:
The MD indoors unit for air distribution via a duct network.
The GC outdoors unit for air treatment.
This range is offered with two options:
•Cooling Only
Standard Cooling function with electric heating as an option.
•Heatpump
Standard Cooling and thermodynamic Heating as standard with additional
electric heating as an option.
1. INDOORS UNIT
This unit incorporates highly sophisticated technical qualities with particularly
well designed aesthetics and ease of installation.
Its low height (300 mm) enables it to be easily integrated into a suspended
ceiling.
It can also be installed in corridors (width: 850 mm)
It incorporates three different ventilation fan speeds.
With air blowing orifices located on both sides and air pressure available for
connection to a duct network, it is capable of air conditioning up to 6 separate
rooms.
Adaptors for flexible ducting (8" to 12") are supplied with the unit.
It is equipped with:
• An infra red receiver, linked to the unit via a 7 m cable enabling all air
conditioning functions to be selected by way of the Liquid Crystal Display infra
red control (see page 41).
• A turbine with very low noise levels.
• An air intake grille (supplied as an accessory) fitted with an acoustic attenuator.
• A condensates lift pump (factory fitted) with a 600 mm lift height for condensates
drainage.
• An electrical connection box on a sliding chassis for easy access to all electrical
connections.
• Complete access to all components via the bottom of the unit.
• 2 installation options:
– Mounting plate and suspension rails.
– Brackets for attachment to threaded rods (not supplied).
• Reusable air filters.

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MD Multi-duct cassettes
MD Multi-duct cassettes
2. OUTDOORS UNIT
Of compact design, taking up very little floor area, this unit houses the «Scroll»
compressor, the fan-condenser assembly and the electrical box.
Two installation possibilities:
• Direct floor installation.
• Wall hanging with accessory (not supplied).
3. REFRIGERATION CIRCUIT
Both the indoors and outdoors units are equipped with «FLARE» connectors,
enabling the use of «FLARE» refrigeration pipes (refrigeration quality copper
pipe)
Depending on the model, pipe lengths can extend up to 50 m.
Heatpump models are equipped with a cooling cycle inversion system enabling
them to operate in an AIR/AIR thermodynamic heating mode down to outside
temperatures as low as –10° C.
A good coefficient of performance (COP) for the transfer of calories from the
outside to the premises to be air conditioned is achieved.
4. OPTIONS
The Cooling only and Heatpump models can be equipped with:
• Electric heating
• New air intake
• Manual treated airflow gate
• Centralised system control possible with RCW-2 wall mounted remote control.
5. DOCUMENTATION
Each unit is supplied with general wiring and connection diagrams and specific
installation and operation instructions.
Each accessory (or kit) is accompanied by technical specifications for fitting and
adjustment as required.

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MD Multi-duct cassettes
MD Multi-duct cassettes
TECHNICAL
SPECIFICATIONS
These characteristics are
provided for information purposes
only and are subject to change
without prior notice.
(1) Test conditions for operating in Cooling mode
Temperature of recycled intake air to be treated:
27° (DBT) / 19 C (WBT)
Outdoor air intake temperature: 35° C (DBT)
Nominal airflow at the evaporator and at the
condenser.
(2) Test conditions for operating in Heating mode
Temperature of recycled intake air to be treated:
20° (DBT)
Outdoor air intake temperature:
7° C (DBT) / 6°C (WBT)
Nominal airflow at the evaporator and at the
condenser.
(3) Noise levels
Global acoustic pressure in dBA at nominal condi-
tions.
Indoors unit:
Installation in average size room (LS – 0.5 s
reverberation at a distance of 1 m)
Outdoors unit:
In open area against a reflecting surface.
Models MD 35 MD 38 MD 50
R-407C refrigerant • • •
Power supply 1~230 V - 50 Hz
Nominal cooling capacity (1)
Nominal power input in cooling mode
W
W
9100
3580
11260
3950
Nominal heating capacity (1)
Nominal power input in heating mode
Cœfficient of performances (COP)
W
W
W/W
9140
3150
2.9
11100
3985
2.76
Power supply 3N~400 V - 50 Hz
Nominal cooling capacity (1)
Nominal power input in cooling mode
W
W
8790
3370
10400
3850
12600
5185
Nominal heating capacity (1)
Nominal power input in heating mode
Cœfficient of performances (COP)
W
W
W/W
8790
3030
2.9
11100
3940
3.82
14500
5180
2.8
INDOOR UNIT
Noise levels (3)
• LS - Low Speed
• MS - Medium Speed
• HS - High Speed
dBA
dBA
dBA
51.3
54.8
57.2
54.8
56
57.2
54.8
56
59.3
Airflow
• LS - Low Speed
• MS - Medium Speed
• HS - High Speed
m³/h
m³/h
m³/h
1040
1180
1700
1180
1475
1700
1180
1475
2000
Dimensions
• Length x Depth x Height mm 1025 x 760 x 300
Weight kg 43 44 44
Packed dimensions
• Length x Depth x Height mm 1125 x 975 x 360
OUTDOOR UNIT
Noise levels dBA 69 65 65
Airflow m³/h 3100 4150 4150
Dimensions
• Length x Depth x Height mm 900 x 340 x 860 900 x 340 x 970 900 x 350 x 970
Weight kg 82 95 95
Packed dimensions
• Length x Depth x Height mm 985 x 406 x 906 985 x 406 x 1020 985 x 406 x 1020
ACCESSORIES & OPTIONS
Air intake grille • • •
Electric heating W 2 x 750 2 x 1500 2 x 1500
New air intake • • •
Manual treated air gate • • •
RCW-2 Wall mounted remote control • • •

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MD Multi-duct cassettes
MD Multi-duct cassettes
OPERATING
LIMITS
The MD indoors units and the GC outdoors units operate within the following
limits:
COOLING mode
Low limits
Indoor temperature DBT °C 21
WBT °C 15
Outdoor temperature DBT °C 21
High limits
Indoor temperature DBT °C 32
WBT °C 23
Outdoor temperature DBT °C 46
HEATING mode
Low limits
Indoor temperature DBT °C 20
Outdoor temperature DBT °C –9
WBT °C –10
High limits
Indoor temperature DBT °C 27
Outdoor temperature DBT °C 24
WBT °C 18
DBT: Dry Bulb temperature (° C)
WBT: Wet Bulb temperature (° C)

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MD Multi-duct cassettes
MD Multi-duct cassettes
COOLING
CAPACITY
Model MD 35
single phase
Model MD 35
Three phase
Outdoor temperature (°C Dry bulb)
Cooling capacity (kW)Cooling capacity (kW)
Outdoor temperature (°C Dry bulb)
Indoor temperature
30° C Dry Bulb - 50% humidity
27° C Dry Bulb - 50% humidity
23° C Dry Bulb - 50% humidity
Indoor temperature
30° C Dry Bulb - 50% humidity
27° C Dry Bulb - 50% humidity
23° C Dry Bulb - 50% humidity

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MD Multi-duct cassettes
MD Multi-duct cassettes
COOLING
CAPACITY
Model MD 38
single phase
Model MD 38
three phase
Cooling capacity (kW)Cooling capacity (kW)
Outdoor temperature (°C Dry bulb)
Outdoor temperature (°C Dry bulb)
Indoor temperature
30° C Dry Bulb - 50% humidity
27° C Dry Bulb - 50% humidity
23° C Dry Bulb - 50% humidity
Indoor temperature
30° C Dry Bulb - 50% humidity
27° C Dry Bulb - 50% humidity
23° C Dry Bulb - 50% humidity

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MD Multi-duct cassettes
MD Multi-duct cassettes
COOLING
CAPACITY
Model MD 50
three phase
Cooling capacity (kW)
Outdoor temperature (°C Dry bulb)
Indoor temperature
30° C Dry Bulb - 50% humidity
27° C Dry Bulb - 50% humidity
23° C Dry Bulb - 50% humidity

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MD Multi-duct cassettes
MD Multi-duct cassettes
HEATING
CAPACITY
Model MD 35
single phase
Model MD 35
three phase
Heating capacity (kW)Heating capacity (kW)
Outdoor dry bulb temperature (°C)
Outdoor dry bulb temperature (°C)
Indoor temperature
20°C Dry bulb
18°C Dry bulb
15°C Dry bulb
Indoor temperature
20°C Dry bulb
18°C Dry bulb
15°C Dry bulb