Carrier 39HXA Manual

INSTALLATION, OPERATION AND
MAINTENANCE INSTRUCTIONS
Translation of the original document
Plug & Play air handling unit with direct expansion
coil
39HXA
Air ow rate from 580 to 8500m³/h

2

3
CONTENTS
1 - RECEIPT........................................................................................................................................................................................4
2 - HANDLING ....................................................................................................................................................................................4
3 - DESCRIPTION OF THE UNIT & TECHNICAL CHARACTERISTICS ..........................................................................................5
3.1 - GENERAL INFORMATION .......................................................................................................................................................5
3.2 - DESCRIPTION OF THE UNIT ..................................................................................................................................................5
3.3 - LOCATION OF COMPONENTS ...............................................................................................................................................6
3.4 - TECHNICAL SPECIFICATIONS ...............................................................................................................................................7
4 - INSTALLATION & CONNECTION............................................................................................................................................... 11
4.1 - INSTALLATION OUTDOORS ................................................................................................................................................. 11
4.2 - CONNECTIONS......................................................................................................................................................................12
4.3 - IDENTIFICATION OF TERMINAL STRIP OPTIONS ..............................................................................................................15
4.4 - INSTALLING THE SIPHON.....................................................................................................................................................17
5 - COMMISSIONING .......................................................................................................................................................................17
5.1 - CONTROL...............................................................................................................................................................................17
6 - MAINTENANCE/SERVICE INTERVALS .....................................................................................................................................18
6.1 - FILTERS..................................................................................................................................................................................18
6.2 - FAN MOTOR ASSEMBLY .......................................................................................................................................................19
6.3 - HEAT RECOVERY UNIT......................................................................................................................................................... 20
6.4 - ELECTRICS BOX....................................................................................................................................................................20
6.5 - ELECTRIC HEATERS.............................................................................................................................................................20
6.6 - HYDRAULIC COILS................................................................................................................................................................20
6.7 - DX COIL .................................................................................................................................................................................. 20
6.8 - SERVICE INTERVALS ............................................................................................................................................................20
7 - PROBLEMS/CAUSES/SOLUTIONS...........................................................................................................................................21
8 - TESTS AND GUARANTEES.......................................................................................................................................................21
The images used on the cover page and within this document are solely for illustration and are not contractually binding. The manufacturer
reserves the right to change the design at any time without notice.
For your safety, we recommend the use of PPE (Personal Protective
Equipment)

4
1 - RECEIPT
The installation and maintenance operations must be performed by qualied and experienced personnel.
This appliance is not designed to be used by persons (including children) with limited physical, sensory or mental
capabilities, or by persons with insufcient experience or knowledge, unless they are being supervised by a person
responsible for their safety or have received instructions on the use of the appliance from such a person.
Children should be supervised to ensure that they do not play with the unit.
Follow the operating precautions to the letter when working on the unit. Labels have been placed on the unit to remind
you of the safety instructions.
As a general rule, follow all applicable safety regulations and standards. Damage to the dual ow air handling unit will be
disregarded in the event of failure to follow the instructions in this document.
Each unit has a name plate bearing an identication number. This number must be quoted in all correspondence.
In accordance with Article 133-3 of the French Code of Commerce, the recipient is entirely responsible for checking the condition of
the goods received. In the event of missing items, the customer must provide the exact number of parcels delivered. Any damaged or
missing items must be specied on the delivery note in the presence of the driver before signing the delivery note. This information
must be conrmed to the carrier by registered letter within three business days. The comments "conditional" and "pending unwrapping"
shall have no value. The client must unwrap the goods in the presence of the driver. Claims must be made at the time of delivery and
be described in detail.
The unit must be stored in its packaging and sheltered from weather.
The machines are supplied as a single unit.
2 - HANDLING
The unit can be handled by slings, lifting beam or stacker. In all cases, the lifting point has to be at the base of the unit. The centre of
gravity is at the centre of the unit.
This operation will be performed by qualied personnel.
The unit must be handled with care, and only in the horizontal
position. If the unit is handled by a lifting beam + slings, tubes
need to be placed in the holes provided in the support feet.
Ensure that the crane hook adapter is large enough to prevent
the belts applying any pressure to the AHU casing.
Furthermore, ensure that the steel tubes are secured to
prevent any movement.
COLIS
PACKAGE
If the above-mentioned lifting methods cannot be used, the unit
may be lifted using a forklift truck, taking great care not to dent
the lower panel (use forks of a sufcient length).
Follow the applicable handling rules.
The units must be set down directly on at, level ground. The atness value must be the best possible, around one per thousand.
Under normal conditions of use, there is no need to x the unit to the oor, unless it is being installed outside of the building.
The unit's support feet must be standing fully on their contact surface. It is important to allow sufcient service space to facilitate
maintenance operations.

5
3 - DESCRIPTION OF THE UNIT & TECHNICAL CHARACTERISTICS
3.1 - GENERAL INFORMATION
During normal use, this unit is intended to operate under the following site conditions:
-Maximum altitude: 1000 m (please consult us for higher altitudes)
-Minimum and maximum temperatures: -10 °C/+40 °C
-Overvoltage category: III
-Pollution degree: 3
3.2 - DESCRIPTION OF THE UNIT
3.2.1 - Data plate
This is xed inside the unit (intake fan section) and shows the unit's specications as well as the order number and code.
02380021/0001
7219278.405377
182 KG
0.75 KW
230/400V 50HZ 2P
XXXXXXXXXXXXXXX
CTA 22 FDY
TENSION / VOLTAGE
P.ABSORBEE / INPUT
INTENSITE / CURRENT
POIDS / WEIGHT SERVICE
Réf. Produit / Item Ref.
An / Year N. Serie : Serial Nbr
ELEC. ELEMENT
P.ABSORBEE / INPUT
BATTERIE + / HEAT
REGIME
Désignation / Description
Composant / Composant
BATTERIE FRD
REGIME
FLUIDE / FLUID
N° Déclaration CE
Repère / Part
3.2.2 - Pictograms
Danger: fan
Condensate drain siphon
Monitor the cleanliness of
the lters
3.2.3 - Weights and dimensions tables
Sizes Dimensions (mm) Total weight (kg)
+/- 10%
Height Length Width
010 958 1266 810 230
020 1158 1310 1010 305
030 1359 1600 1210 470
050 1659 1600 1510 603
075 1959 1600 1810 648
The dimensions in the tables above include all the components attached to the casing (hinges, collars, feet).
Grounding compulsory
Danger: electrics box

6
3 - DESCRIPTION OF THE UNIT & TECHNICAL CHARACTERISTICS
3.3 - LOCATION OF COMPONENTS
4
3
2
4
76
1
4
5
48
1 Fan motor assembly
2 General switch (on outer casing)
Main earth terminal (on inner casing, see p. 12)
3 Electrics box
4 Filters
5 Rotary heat exchanger
6 Energy meter enclosure (if present)
7 Indoor coil (hydraulic, electric or DX)
8 VRF electrics box option

7
3 - DESCRIPTION OF THE UNIT & TECHNICAL CHARACTERISTICS
3.4 - TECHNICAL SPECIFICATIONS
3.4.1 - Air ow rates
Size
Minimum ow rate
m³/h Nominal Flow Rate
m³/h
Maximum ow rate
m³/h
DX coil Other coils Cooling coil (water
and DX) Other coils
1000 580 350 1000 1200 1450
2000 940 500 2000 2500 2800
3000 1500 700* 3000 3700 4500
5000 2600 900 5000 5700 7000
7500 3000 1400 7500 8500 11000
* 800 if aluminium wheel
Operating limit temperature: -30°C/+ 60°C
3.4.2 - Filters
M5 HEE lter F7 HEE lter F9 HEE lter
Thickness: 48 mm Thickness: 48 mm Thickness: 48 mm
Fire rating: M1 Fire rating: M1 Fire rating: M1
Single ltration
Sizes
010 020 030 050 075
Filter Dimensions x Number of cells/air ow (704x327x48) x 1 (452x435x48) x 2 (552x535x48) x 2 (466x685x48) x 3 (566x835x48) x 3
Dual ltration
When dual-stage ltration is installed, the two stages of cells are installed on the same runner.
Recommended fouling level value
The pressure switches installed enable a lter fouling warning to be issued. They are factory-set, based on:
• the unit size
• the selected ow rate
• the lter efciency
The graphs below give values which enable the actuation threshold for the pressure switches to be dened based on the selected ow rate.
M5
ΔP (Pa)
Qv (m³/h)
0
10
20
30
40
50
60
70
80
90
100
0100020003000400050006000700080009000
010
020 030 050 075
F7
0
20
40
60
80
10
0
12
0
140
0100020003000400050006000700080009000
ΔP (Pa)
Qv (m³/h)
010
020 030 050 075

8
3 - DESCRIPTION OF THE UNIT & TECHNICAL CHARACTERISTICS
F9
0
50
10
0
15
0
20
0
25
0
30
0
01000200030004000500060007000800
09
00
0
ΔP (Pa)
Qv (m³/h)
010
020 030
050 075
M5 + F7
0
50
10
0
15
0
20
0
25
0
01000200030004000500060007000800
09
00
0
ΔP (Pa)
Qv (m³/h)
010
020 030
050 075
M5 + F9
0
50
10
0
15
0
20
0
25
0
30
0
35
0
400
01000200030004000500060007000800
09
00
0
ΔP (Pa)
Qv (m³/h)
010
020 030
050 075
3.4.3 - Fan motor assembly
EC motor
This fan motor assembly is a direct coupling type plug fan.
The unit is equipped with 2 fan motor assemblies: 1 at the intake and 1 at the exhaust. Sizes 1000, 2000 and
3000 are available in an aluminium or polypropylene version; refer to the equipment selection sheet to nd
out the type of fan used.
Aluminium wheel
Sizes
010 020 030 050 075
Wheel Ø 250 280 310 355 450
Quantity 22222
Max. power (W) 2 x 500 2 x 1000 2 x 1800 2 x 2680 2 x 3030
Max. current (A) 2 x 2.2 2 x 1.6 2 x 2.8 2 x 4.1 2 x 4.7

9
3 - DESCRIPTION OF THE UNIT & TECHNICAL CHARACTERISTICS
Polypropylene wheel
Sizes
010 020 030
Wheel Ø 250 310 400
Quantity 222
Max. power (W) 2 x 520 2 x 790 2 x 1320
Max. current (A) 2 x 2.3 2 x 1.3 2 x 2.1
3.4.4 - Heat recovery unit
Constant speed rotary heat exchanger controlled by the unit's control system.
3.4.5 - Options and accessories
Support feet and accessories
To obtain a greater clearance height, t the adjustable feet (30 to 100 mm) underneath the standard feet.
Cylinder
Reinforcement plate
3.4.6 - CO2sensor
The CO2sensor must be positioned on the return air duct, so that it can measure the CO2 level emitted from the part(s) treated.
This sensor is supplied as a spare part and the manual for this is included in its packaging.
Operating principle:
To congure the CO2 level activation threshold, refer to the information on air quality for the town/city in which the AHU is installed.
CO2concentration scale and the effects on humans:
CO2concentration Effect on humans
380 - 480 ppm Normal atmospheric level
600 - 800 ppm Correct level for enclosed spaces
1000 - 1100 ppm Tolerable level for enclosed spaces
5000 ppm Upper limit for 8 hours of exposure
CO2sensor
The CO2 sensor provides an operating range of 0 to 2000 ppm and must be installed in a duct (refer to the attached supplier instructions).

10
3 - DESCRIPTION OF THE UNIT & TECHNICAL CHARACTERISTICS
3.4.7 - Constant pressure sensor
Constant pressure is only controlled on the
ow of fresh air being supplied (if the optional constant pressure kit
has been purchased).
The fresh air fan is controlled by the signal from this pressure sensor
in the duct.
The exhaust air ow is controlled by the ow rate signal read off the
ow of fresh air, and may vary according to a factor M (0.5 – 1.5).
Two pressure values can be congured: Nominal pressure and
Reduced pressure.
The duct pressure sensor must be positioned on the supply air
inlet duct at a distance:
D = 2 Dh (hydraulic Ø)
• If the duct is circular, Dh = Ø of the duct
• If the duct is rectangular
Dh = 2 x L x l
L+l
Changeover thermostat for mixed coil:
The customer is responsible for installation on the hydraulic system. The changeover thermostat
installed on the pipe must be integrated into the insulation of the hydraulic pipe.
Technical characteristics
Min. WINTER temp.: 28 °C
Min. SUMMER temp.: 18 °C
Breaking capacity: 5(3) A.
Cable length: 2500 mm
BLACK wire (winter)
IVORY wire (shared)
BLUE wire (do not use)
Damper
The damper is not protected against the weather if the canopy option has not been selected.

11
4 - INSTALLATION & CONNECTION
The installation of the equipment must comply with the regulations and standards of the recipient country.
Ensure all electrical components are earthed.
The equipment must not be accessible to the public.
Special recommendations:
• Connections must not place mechanical stresses on the
unit.
• Keep all inspection doors closed while the unit is operating
• It must not be possible to access the fans via the connection
frames for the unit. If there is a direct air intake, a grille must
be tted, as a minimum.
• If tted outdoors, the units must be installed so as to
withstand the climate conditions in the installation location
(risk of snow: height from ground/risk of wind: suitable
mountings, gooseneck type electric connection to the unit,
etc.).
Flexible sleeve
4.1 - INSTALLATION OUTDOORS
The installation of a dual-ow unit outdoors requires a roof and a canopy to be tted; these are usually supplied mounted* and adapted
to suit each conguration.
(* supplied in kit form if delivery of the elements assembled is not possible)
4.1.1 - Fitting the roofs
The roofs for units are designed to provide sufcient protection against adverse weather conditions, as they overlap the edge of the
unit by 80 mm.
Fitting procedure:
1. Afx the foam gasket along the length of the unit (50 x 20 foam gasket).
2. Fix the roof panel(s) along the entire length of the unit.
50x20 foam gasket bonded for
roof curvature
3. Assemble the roof on the unit as per the following diagram
Ø 4.8 sealed rivet or Ø 4.2 self-drilling screw
+ sealed washer
Side rail
Ø 22.2 blanking cover
Roof
Ø 4.8 self-drilling screw

12
4 - INSTALLATION AND CONNECTIONS
4.1.2 - Fitting the canopy without damper
The upper panel will be assembled on the two side panels using screws, washers and nuts or sealed rivets. Also t the protective
screen during installation.
Fix a sealing gasket around the edge of the canopy which will be in contact with the unit and apply mastic if necessary.
Ø 4.8 sealed rivet
Screen
Detail A
Flat
Ø 4.8 sheet metal screw
Sizes A B C C2 D N x E M x F Weight (kg) Openings
010 637 274 394 376 598.5 2x190 2x313 2,5 Circular
020 737 304 494 476 698,5 2x240 2x363 3,4
030 1188,5 358 579 560 1150 2x265 3x340 5,3
Rectangular050 1488,5 390 669 650 1149 2x310 6x220 6,7
075 1788,5 528 869 841 1750 2x405 5x324 12,2
4.2 - CONNECTIONS
4.2.1 - DIMENSIONS OF AIR FLOW CIRCUITS
Sizes
010 020 030 050 075
Connections (mm)
air intake and discharge Ø 250 Ø 355 458x984 608x1284 758x1584
* Internal dimensions

13
4 - INSTALLATION AND CONNECTIONS
4.2.2 - DIMENSION OF THE HYDRAULIC CIRCUITS (Indoor hydraulic coil)
VALVE CONNECTION
Heating/cooling assembly
O-ring
2-WAY VALVE
THREE-WAY VALVE
OUT
IN
O-ring
OUT
Coil connections Coil connections
IN
The diameter of the condensate tube on all the pans is 16 mm
1 row coil Sizes
1000 2000 3000 5000 7500
Ø connections (mm)
4-way valve
Valve inlet G 1/2" G 1/2" G 3/4" G 3/4" G 1"
Valve outlet G 1/2" G 1/2" G 3/4" G 3/4" G 1"1/2
Batterie 2 rangs Sizes
1000 2000 3000 5000 7500
Ø connections (mm)
4-way valve
Valve inlet G 3/4" G 3/4" G 3/4" G 3/4" G 1"
Valve outlet G 3/4" G 3/4" G 3/4" G 3/4" G 1"1/2

14
4 - INSTALLATION AND CONNECTIONS
4.2.3 - DIMENSION OF THE REFRIGERANT CIRCUITS (Indoor DX coil)
The diameter of the condensate tube on all the pans is 16 mm
2 row coil Sizes
010 020 030 050 075
Ø Refrigerant connections
Liquid inlet 12 mm 12 mm 16 mm 16 mm 2x16 mm
Gas outlet 16 mm 18 mm 22 mm 28 mm 2x22 mm
Internal volume (litres) 0.465 0.952 1.49 2.16 3.63
3-4 row coil Sizes
010 020 030 050 075
Ø Refrigerant connections
Liquid inlet 12 mm 12 mm 16 mm 2x22 mm 2x22 mm
Gas outlet 16 mm 18 mm 28 mm 2x28 mm 2x28 mm
Internal volume (litres) 0.932 1.91 2.98 4.32 5.24
4.2.4 - ELECTRICAL CONNECTIONS
Sizes
1000 2000 3000 5000 7500
Voltage (V) 230 V 1-Ph 400 V 3-Ph
Max. current (A) without electric heater 5.4 3.6 6.1 8.8 10.3
Minimum power supply cable section without electric
heater 3G1 4G0.75 4G1 4G1.5 4G1.5
Max. current (A) with indoor electric heater 32.4 21.8 33.5 50.6 59.4
Minimum power supply cable section with electric heater 3G6 4G2.5 4G6 4G10 4G10
Disconnect switch size OT40 (40 A) OT63 (63 A)
Max. terminal section (mm2)0.75 to 10 1.5 to 35
Torque Value (N.m) 0.8 2
• Connect the unit's electrics to the power network as per the table above.
• Connection to the machine's general disconnect switch located inside it (Ø 22.2 blanking cover provided).
• For sections between 0.75 and 2.5 mm2, a H 05 VV-F type cable may be used, otherwise the cable must be type H 07 RN-F.
• The power supply cable must be sized in accordance with current standards and regulations.
• The supply cable must be secured using the anchorage provided (located between the disconnect switch and the Ø 22.2 blanking
cover). Once the supply cable has been fed through and connect, tighten the clamp fully and cut the end extending past the
clamp.
• Respect the current assigned to the disconnect switch for the air handling unit.
• The leakage current may reach 13 mA. An earth connection is compulsory. Each unit is equipped with 2 earth terminals (PE)
indicated by the logo , one close to the disconnect switch, and the other on one of the unit's feet. Both terminals must be
permanently connected.
Ø 22.2 blanking cover
Anchorage
Earth terminals
Disconnect switch

15
4 - INSTALLATION AND CONNECTIONS
4.3 - IDENTIFICATION OF TERMINAL STRIP OPTIONS
PRESSOSTAT FILTRE INTRODUCTION
PRESSURE SWITCH SUPPLY AIR FILTER
PRESSOSTAT FILTRE EXTRACTION
PRESSURE SWITCH EXHAUST AIR FILTER
EXHAUST AIR TEMPERATURE
SUPPLY AIR TEMPERATURE
FRESH AIR TEMPERATURE
-X2
1
X2:2 14
DEFAUT INCENDIE
FIRE DEFAULT
2
X2:1 15
3
20
SYNTHESE DEFAUT
DEFAULT SYNTHESIS
4
21
7
:GND 7
PRESSION GAINE / QUALITE AIR
DUCT PRESSURE / AIR QUALITY
8
B1:OUT 8
9
B1:I
N3
10
X2:1
11
4
ECO / CONFORT
ECO / COMFORT
11
X2:1
01
7
12
X2:1
31
4
COMMANDE A DISTANCE
REMOTE CONTROL
13
X2:1
21
8
14
3CAV42:1enuT-ht
ALIMENTATION TH TUNE
SUPPLY TH TUNE
15
4DNG:1enuT-ht
W9
21
Xf8:
12
4
1
REGISTRE 1
DAMPER 1
22
Xf8:
24
2
W10
23
Xf9:
12
4
1
REGISTRE 2
DAMPER 2
24
Xf9:2 4
2
W6
31
PP1:122
1
32
PP1:
25
2
W7
33
PP2:
12
2
1
34
PP2:
26
2
35
B6:B1 7
TEMPERATURE EXTRACTION
36
B6:B2 9
37
B4:B1 7
TEMPERATURE INTRODUCTION
38
B4:B
21
0
39
B5:B
11
1
TEMPERATURE AIR NEUF
40
B5:B
21
2
"Customer" cable grommet
NB: the maximum section of the stripped wire is Ø 1.5 mm and Ø 0.5 mm for a wire with an end-piece.*
■Fire detection: 2 wires
Machine terminal block Notes Inlet/Outlet
X2 _ b-1 Fire detection activation Digital inputs
X2 _ b-2 Dry Contact
Contact normally closed
■Fault feedback: 2 wires
Machine terminal block Notes Inlet/Outlet
X2 _ b-3 Fault summary
Dry contact (shared b-4) Digital outputs
X2 _ b-4 Common
■Constant intake duct pressure sensor/IAQ control sensor: 3 wires
Machine terminal block Notes Inlet/Outlet
X2 _ b-7 Fire detection activation
Analogue inputs
X2 _ b-8 0-10V pressure control signal (OUT) or Sensor/
Transmitter rear probe 0-10V active sensor
X2 _ b-9 Sensor 24V supply

16
4 - INSTALLATION AND CONNECTIONS
CO2
123
+
I GND V
3 fils
Alimentation
24 Vdc
Afficheur régulateur ou
automate type actif
Sortie 0-10 V
--
-
+
+
+
+
45 67
Duct pressure: CP51
3
2
1
IN
OUT
GND
techn. 3 fils
■Eco/Comfort contact: 2 wires
Machine terminal block Notes Inlet/Outlet
X2 _ b-10 Eco/Comfort mode control
Dry contact (shared b-10) Digital inputs
X2 _ b-11
■Remote On/Off: 2 wires
Machine terminal block Notes Inlet/Outlet
X2 _ b-12 Unit ON/OFF monitoring
Dry contact (shared b-12) Digital inputs
X2 _ b-13
■Th-Tune power supply: 2 wires
Machine terminal block Notes Inlet/Outlet
X2 _ b-14 24V power supply pLAN
X2 _ b-15 Ground
■Presence of changeover coil: 2 wires
Machine terminal block Notes Inlet/Outlet
X2 _ b-16 C/O thermostat black wire Digital inputs
X2 _ b-17 C/O thermostat white wire
The changeover thermostat must be positioned on the "customer" hydraulic pipe, on the "uid entering the coil" side (so as to be in
the insulation).
Contact open: normal operation in cooling mode
Contact closed: operation in heating mode (contact closed from 28 °C)
24 Vdc
supply
Controller display or active
controller
0-10 V output
3 wires
techn. 3 wires

17
4 - INSTALLATION AND CONNECTIONS
4.4 - INSTALLING THE SIPHON
It is important to ensure the siphon is correctly tted, as per the diagram below. For a depression H in the condensate drain, the sizing
of the siphon must incorporate dimensions of 2H
Schematic diagram of siphon
Assembly with depression :
Z: X+Y+tubing diameter + insulation thickness
Y : Y = 0.5 x X
X: X = 25 mm for each 250 Pa of negative static pressure + 25 mm
mmWC
Slight slope of 0.005
To sewer system
Z (mm)
Y (mm) X (mm)
Negative pressure recovery pan
5 - COMMISSIONING
Commissioning must be performed by qualied personnel, trained in air handling technology. Keep all inspection
doors closed while the unit is operating.
Once the electrical, hydraulic and refrigerating connections have been carried out, proceed with system start-up for the unit, checking
the steps below:
• For units with DX coil, the refrigerating machine must be operational (system start-up of the refrigerating machine not provided
by Carrier).
• Check the tightness of all connections,
• Make sure that the inside of the unit is clean, and that there are no foreign bodies inside it,
• Check the wiring
• Check the electrical supply voltage and the ratings of the overload protections against the current ratings of each component,
• To congure the setpoints, refer to the control system manual,
• Simulate activation of the various electric components, controlled components and alarms,
• Check the currents:
-Temperature alarm,
-Air ow alarm,
-Fan motor assembly
• Check the air ow rates
• After a few hours' operation, check the lter fouling condition.
5.1 - CONTROL
For adjustment and conguration of the control system, refer to the corresponding manual provided with the unit.

18
6 - MAINTENANCE/SERVICE INTERVALS
Switch off the electrical supply to the air handling unit before carrying out any work
Details of hinges/handles: Allen key locks, size 4
When they are unlocked, the handles are in "hinge" mode. It is possible to unlock a single row of handles to open like a conventional
door. If all of the handles are unlocked, the door can be removed.
Handle locked
Handle unlocked
Door
6.1 - FILTERS
After commissioning, the speed of lter fouling will depend on the care taken when cleaning the air ow circuits. Hence the frequency
of lter checks should be increased during this period.
6.1.1 - Maintenance intervals
The lter life depends essentially on the amount of dust in the air and the efciency of the ltration system. The ltration quality cannot
be maintained if the lter medium has been damaged during maintenance. We recommend that the lters be replaced once every two
years, even in the case of moderate use
6.1.2 - Filter replacement method
During lter maintenance operations, it is important not to spread the dust that has accumulated in the lters.
Turn off the unit.
Access the lters by opening the door panels.
Simply pull on the lters.

19
6 - MAINTENANCE/SERVICE INTERVALS
6.2 - FAN MOTOR ASSEMBLY
Check and retighten the electrical connections once a year.
6.2.1 - Intake FMA removal method
1. Open the door
2. Release the 4 x M8 screws
3. Disconnect the motor's electrical connections
4. Take out the FMA
6.2.2 - Exhaust FMA removal method
1. Open the door 2. Remove the upper and lower xings from the electrics box
3. Move the electrics box; a sufcient length of cable is provided 4. Disconnect the various quick connectors
5. Provide sufcient clearance 6. Remove the 4 x M8 screws

20
6 - MAINTENANCE/SERVICE INTERVALS
7. Disconnect the motor's electrical connections 8. Take out the FMA
To ret, perform the operations in reverse order.
Check that the box and the connectors are secure before commissioning.
6.3 - HEAT RECOVERY UNIT
6.3.1 - Rotary heat exchangers
Check the rotation speed once a year.
When stationary, the rotary heat exchangers accumulate dust and moisture at their lowest point.
Schedule cleaning during prolonged stoppages.
Check the permanently lubricated bearings once a year.
6.3.2 - Wheel consumption
Sizes
010 020 030 050 075
Constant speed Power (W) 25 25 40 90 180
Voltage (V) 230 V 1-Ph 400 V 3-Ph
6.4 - ELECTRICS BOX
Retighten the connections twice a year.
Visually inspect the components, wires and cables.
6.5 - ELECTRIC HEATERS
The electric heater requires very little maintenance. However, the following checks are necessary:
Visually inspect the heating elements, wires and connection cables after every 1500 hours of operation.
Check and retighten the connections once or twice a year.
6.6 - HYDRAULIC COILS
The hydraulic coil requires very little maintenance as it is protected by the lter.
6.7 - DX COIL
The DX coil requires very little maintenance as it is protected by the lter.
6.8 - SERVICE INTERVALS
Regular maintenance will keep the unit running at optimum performance. The values given in the table below are provided for guidance
only. They do not take into account individual factors that can lengthen or shorten the unit's service life.