Lennox ARIA EC Series User guide

Providing indoor climate comfort
ARIA EC
Application guide
ARIA EC-AGU-0909-E

ARIA EC-AGU-0909-E Page 1
Contents
Introduction ...................................................................................................................................... 2
Main components
Fan motor........................................................................................................................................ 3
Water coil ........................................................................................................................................ 3
Condensate drain tray..................................................................................................................... 3
Filter and access ............................................................................................................................. 4
Electric heater ................................................................................................................................. 4
Fresh air supply............................................................................................................................... 4
Characteristics ................................................................................................................................. 5
Codification....................................................................................................................................... 6
Airflow data....................................................................................................................................... 7
Acoustic data.................................................................................................................................... 9
Cooling performance data
Size 10 – 2 row coil......................................................................................................................... 11
Size 20 – 4 row coil......................................................................................................................... 12
Size 30 – 4 row coil......................................................................................................................... 13
Size 40 – 4 row coil......................................................................................................................... 15
Heating performance data
Size 10 – 1 row coil......................................................................................................................... 17
Size 10 – 2 row coil......................................................................................................................... 18
Size 20 – 1 row coil......................................................................................................................... 19
Size 20 – 4 row coil......................................................................................................................... 20
Size 30 – 1 row coil......................................................................................................................... 21
Size 30 – 4 row coil......................................................................................................................... 23
Size 40 – 1 row coil......................................................................................................................... 25
Size 40 – 4 row coil......................................................................................................................... 27
Water coil pressure drop................................................................................................................. 29
Dimensional data
ARIA T10 - 2 row coil - Left hand configuration .............................................................................. 31
ARIA T20 - 4 row coil - Left hand configuration ............................................................................. 32
ARIA T30 - 4 row coil - Left hand configuration .............................................................................. 33
ARIA T40 - 4 row coil - Left hand configuration .............................................................................. 34
Control valves
2 way valve body and 3 ways with bypass ..................................................................................... 35
Proportional valve actuator ............................................................................................................. 35
On/Off type valve actuators ............................................................................................................ 35
Valve pressure drops ...................................................................................................................... 36
Flexible connections........................................................................................................................ 36
Specification guide .......................................................................................................................... 37

ARIA EC-AGU-0909-E Page 2
Introduction
The ARIA EC compact air conditioning module is available in two sizes for conditioning rooms from 12 to 50 m².
ARIA EC has been designed to match with very last rules in energy savings and comfort. It is equipped with new
generation electronic commutation (EC) motors whose electric consumption is lower than motors used in
traditional fan coils.
This very low consumption added to speed variation provide a 75 % electric consumption annual saving.
Electronically commutated motors can control rotation speed from 10 to 100% of its operating range.
This EC technology allows suppressing all electric noises and vibrations risks and also significantly decreasing
overheating, increasing lifecycle of the unit. ARIA EC is the perfect solution for the air conditioning of luxury
residential and tertiary buildings. The installation in false ceiling is easy, allowing high installation and
maintenance economies.
The overall height of 233 mm of allows an integration of very weak false ceiling voids met in buildings in restoration or
buildings of which the overall height is of primary importance
ARIA units supply and return air spigots positions may be adapted to specific building requirements. The
installation of this unit will be generally made with the top of the false ceiling of space conditioning, near the supply
and return air diffusers.
The fan available static pressure provide for multiple installation possibilities; simplified and reduced maintenance,
ease of access to all components, are essential attributes for an intelligent air conditioning system.
The electronical commutation of motors allows the airflow to be appropriately set to the specific thermal need of
the building. The communicating or non-communicating electric control permanently adjusts ARIA EC operation
ARIA EC units are available in all the configurations demanded by the market, i.e. 2 Pipe Change/Over, 2
Pipe/2Wire and 4 Pipe. The On/Off type water flow control valves associated with electronic controls, offer a
perfect control of the space temperature. The electric heaters used in the 2P/2W application, are equipped as
standard with a manual reset thermostat, reset by switching off the power, and thermo fusible link.
Characteristics
The modular design of the ARIA EC adapted to "intelligent" buildings, allows it to be meet the air conditioning
requirements of medium sized rooms.
The very low height of the module, 233 mm overall, is made from 8/10 mm galvanised steel sheet internally lined
with 8 mm thick Melamine foam insulation protected by an aluminium film (Fire class M1). As ann option, ARIA EC
unit can be covered with foam reinforced for decreased the noise level.
ARIA EC unit is equipped as standard with 4 suspension fixings incorporating (pouvant recevoir) rubber anti
vibration mounts specially designed to support the weight of the unit and absorb the frequencies generated.

ARIA EC-AGU-0909-E Page 3
Main components
Fan motor
The ARIA EC unit is equipped with a centrifugal forward curved single scroll fan with
double inlet. The fan (s) will respectively produce a nominal airflow at 40 Pa static
pressure from 400 m3/h (size 10) to 900 m3/h (size 40).
The electronically commutated (EC) motor is supplied by 230-1-50 current and 0-10V
control command for rotation speed variation from 0 to 100%.
Water coil
The right position of the coil provides a maximum heat exchanger surface for a minimum of space, thus giving to
ARIA EC range a very interesting ration height/performance.
Available for 2 pipe or 4 pipe applications, the finned block is common offering an increased heat exchanger surface
area.
The aluminium fins are mechanically bonded to 3/8‘’ diameter copper tubes. The inlet and outlet connections are
each provided with a 1/2‘’ G internal diameter threaded nut to facilitate the connection of the flat seal valve
connection. The purge screws are accessible from the outside and opened with a tool.
Following configurations avec available:
•2 pipes/Change over and 2 pipes/electric heater or
•4 pipes
2 T 4 T
Size 10 2 R or 3 R 2 R + 1
3 R + 1
Size 20 – 30 – 40 4 R 4 R + 1
Condensate drain tray
The condensate drain tray in aluminium is cast solid and common to the coil
and the valves outside the unit, thus avoiding any risk of possible escapes.
The external part is isolated on its lower part with foam PE thickness 3 mm,
to prevent of any risk of condensation. The tube of evacuation of external
diameter 16 mm makes it possible either to connect piping directly or to
connect a pump with condensate available in option.

ARIA EC-AGU-0909-E Page 4
Electric heater
The electric heater is of the bare wire resistive type installed in the fan
discharge air stream, assuring optimum coverage and maximum heat
exchange.
Available as standard with a capacity of 500, 800, 1200, 1500 or 3000
Watts, the 230 V/1/50 Hz power supply is provided directly from the
controller or via a relay and a fuse.
The heater is provided with 2 levels of safety :
•A manual reset thermostat, which is reset is by switching off the power, and has a trigger temperature
75°C; whilst this is off a PTC coefficient resistance with a separate supply prevents the automatic reset
of the coil whilst it remains under voltage. Restarting is done by coil supply voltage cut-off. This safety
thermostat protects the unit from over heating due to the absence of airflow.
•A fusible link, rated at temperature152 °C (± 16 °C). Replacement of heater assembly will be required if
this blows, after establishing the cause of the fault.
Filter and access
ARIA EC is available as standard with a G3 efficiency throwaway filter, 15 mm
thick, which is accessible from the underside of the unit. Fire classification M1.
As an option, ARIA EC unit can be provided with a G4 filter, 20 mm thick, with
access from the underside of the unit.
Fresh air supply
ARIA EC units can be provided with a fresh air connection spigot as an
option allowing the each space to be supplied with fresh air as required by
regulations.
Each spigot can be fitted with a constant volume fresh air controller to set
the air flow to a predefined value. The air volume is precisely controlled for
variations in the system duct pressure between 50 and 200 Pa.
The fresh air connection is located before the fan and heat exchanger coil.
The external diameter of the connection spigot is either 99 mm or 124 mm depending upon the type of controller insta
(8.3 or 44.4 l/sec.).
The available controllers are :
Diameter 99 mm : 8.3 to 25 L/sec (30 to 90 m3/h – 10% / + 20%)
Diameter 124 mm: 20.8 to 44.4 L/sec (60 to 160 m3/h –10%/+ 20%)
The airflow of the 124 mm diameter fresh air controller can be easily modified on site by repositioning the baffles
inside the controller; an instruction label for this procedure is located on the unit close to the spigot.

ARIA EC-AGU-0909-E Page 5
Characteristics
Physiques et électriques
ARIA Size 10 Size 20 Size 30 Size 40
Nominal air flow L/sec 97 96 190 218
Available static pressure Pa 40 40 40 40
Total cooling capacity (1) kW 1,6 2,5 4,3 5,51
Sensible cooling capacity (1) kW 1,3 1,9 3,32 4,12
Heating capacity (2) kW 1,9 2,8 4,84 5,95
Electrical supply Single phase – 50 Hz – 230V +/- 10%
Fan Forward action
simple wheel
Forward action
double wheel
Forward action
double wheel
Forward action
double wheel
Air flow at maximum speed L/sec 111 111 230 250
Available static pressure Pa 50 50 50 50
Fan number 1 1 2 2
Motor Brushless type EC 230V/1/50
Maximum absorbed power W 68 67 95 84
Nominal current A 0,66 0,62 0,84 0,79
Starting current A 0 0 0 0
Water coil
3/8 " copper tubes – Aluminium fins 2 rows / 1 pipe 4 rangs / 2 voies 4 rangs / 3 voies 4 rangs / 4 voies
Water content L 0,5 0,94 1,6 2,25
Operating pressure kPa 16 16 16 16
Test pressure kPa 24 24 24 24
Electric heater
Electrical supply "UDH" bare wire resistive type, single phase – 50 Hz – 230 V +/- 10%
Protections Manual reset thermostat (reset by switching off the power)
Trigger temperature 75°C thermo fusible link; breaks at 152 °C
500 500 500 500
800 800 800 800
1200 1200 1200 1200
1200 1500 1500 1500
1500 2 x 800 2 x 800
Power (+5% / -10%) not including fan W
1500 2 x 1500 2 x 1500
Minimum air flow L/sec 92 92 92 / fan 92 / fan
Air filter 95% gravimetric efficiency (G3 following EN 779) throwaway type
M1 fire rating, metal wire frame
Dimensions mm 415 x 225 x 10 415 x 225 x 10 715 x 225 x 10 1015 x 225 x 10
Weight and dimensions
Length x width x height (3) mm 886 x 428 x 233 886 x 428 x 233 886 x 728 x 233 886 x 1028 x 233
Weight Kg 16 16 28 35
(1) : Based on water entering temperature of 7 °C and a water temperature difference of 5 °C at nominal conditions, air at 27 °C dry
bulb, 50 % relative humidity
(2) : Based on water entering temperature of 50°C and a water temperature difference of 10° at nominal conditions, air at 20°C
(3) : Dimensions refer to a unit with return and supply spigot, without any condensate drain tray.

ARIA EC-AGU-0909-E Page 6
Codification
CODIFICATION
COLOUR Speed A B C D E F G H I J
RED 1 1 1 1 1 1 1
BLUE 2 2 2 2 2 2 2
WHITE 3 3 3 3 3 3 3
BROWN 4 4 4 4 4 4 4
Motor fan wiring
BLACK 5 5 5 5 5 5 5
NOTA : spigot configuration is defined when viewing ARI EC unit looking in the direction of the air flow inside the
unit
Example :
ARIA EC 20 4R 1R SX
ARIA Size 20 –
Electronical
commutation 4
pipes motor
4 row heating coil 1 row cooling coil SX hydraulic connection (left side)
2.3 Packaging
ARIA EC units are packed on palettes in multiples of 12 units, film-wrapped; a maintenance and storage
precautions notice is fixed to each palette.
The palette dimensions are as follows :
- Length 1500 mm
- Width 1200 mm
- Height 1500 mm

ARIA EC-AGU-0909-E Page 7
Airflow data
ARIA EC – Size 10
Caractéristiques Aérauliques ARIA EC T10
7V
8V
6V
4V
2V
10V
8V 40Pa
5V
0
10
20
30
40
50
60
70
80
90
100
110
0 50 100 150 200 250 300 350 400 450 500 550
Débit d'air (m3/h)
Pression Dispo (Pa)
ARIA EC – Size 20
Caractéristiques Aérauliques ARIA EC T20
10V
8V
6V
4V
2V
7V
8V 40Pa
5V
0
10
20
30
40
50
60
70
80
90
100
0050040030020010
Débit d'air (m3/h)
Pression Dispo (Pa)
A
irflow
(
m
3
/
h
A
irflow
(
m
3
/
h
Availalb e static pressure (Pa)
Availalb e static pressure (Pa)

ARIA EC-AGU-0909-E Page 8
ARIA EC – Size 30
Caractéristiques Aérauliques ARIA EC T30
10V
8V
7V
6V
5V
4V
2V
8V 40Pa
0
10
20
30
40
50
60
70
80
90
100
110
0 1002003004005006007008009001000
Débit d'air (m3/h)
Pression dispo (Pa)
ARIA EC – Size 40
Caractéristiques Aérauliques ARIA 40
10V
8V
7V
6V
5V
4V
2V
8V 40Pa
0
10
20
30
40
50
60
70
80
90
100
110
120
0 100 200 300 400 500 600 700 800 900 1000 1100
Débit d'air (m3/h)
Pression dispo (Pa)
A
irflow
(
m
3
/
h
A
irflow
(
m
3
/
h
Availalb e static pressure (Pa)
Availalb e static pressure (Pa)