aerauliqa QRCE Series User manual

MIUM0018_REV06_ QRCE_20180312-MIUM-ENG-AQ AQ_001523_02_0721
1
ENG
INSTALLATION, OPERATION AND
MAINTENANCE MANUAL
VENTILATION UNIT WITH
HIGH EFFICIENCY HEAT RECOVERY
SERIES QRCE
The data of this manual may be subject to updating. We reserve the right to make modification without prior notice.

MIUM0018_REV06_ QRCE_20180312-MIUM-ENG-AQ AQ_001523_02_0721
2
ENG
Dear Customer,
Thank you for having purchased an Aerauliqa product. It is the result of many years of experience, research and has been
made with top quality materials and highly advanced technologies. The CE mark guarantees that the machine meets the
European Standards regarding safety.
The qualitative level is kept under constant surveillance. Aerauliqa products therefore offer SAFETY, QUALITY and
RELIABILITY.
The manufacturer declines all responsibility for any inaccuracies in this manual due to printing or typing errors.
The manufacturer reserves the right to modify the products contents in this catalogue without previous notice.

MIUM0018_REV06_ QRCE_20180312-MIUM-ENG-AQ AQ_001523_02_0721
3
ENG
SYMBOLOGY
ATTENTION
DANGER
HIGHRISK OF ELECTRIC SHOCK
ATTENTION: AUTHORIZED PERSONNEL ONLY
1–INTRODUCTION
pag. 4
2-DIMENSIONS AND WEIGHTS
pag. 5
3–HANDLING,TRANSPORT AND STORAGE
pag. 8
4–INSTALLATION &CONNECTION
pag. 9
5–WIRING DIAGRAMS
pag. 19
6–ELECTRONIC CONTROL
pag. 19
7–SCHEDULED AND NOT-SCHEDULED MAINTENANCE
pag. 19
8–TROUBLESHOOTING
pag. 25
9–MATERIAL DISPOSAL
pag. 25

MIUM0018_REV06_ QRCE_20180312-MIUM-ENG-AQ AQ_001523_02_0721
4
ENG
1-INTRODUCTION
Dear Customer,
this ventilation unit with air-to-air counterflow heat recovery has been designed and developed for civil (not residential) and
commercial applications and allows the room air renewal while minimizing primary energy consumption; therefore, it shall
be used only for this purpose.
The Manufacturer will not respond about any damage due to a different, improper and not right use, or to a use not
described in this manual.
These units are suitable for a working environment free of aggressive, corrosive and/or explosive agents, which
can irreparably damage their components and structures.
Working environment shall be characterized by air temperature not lower than -20°C and not higher than 45°C
and by relative humidity not higher than 95%.
For special or out of range applications first contact Aerauliqa for a feasibility analysis.
This unit, in its basic configuration, is essentially composed of (fig. 1) :
1 –supply and exhaust EC fan
2 –high efficiency air-to-air heat recovery with built-in motorized by-pass device
3 –air filter close to air inlet (class efficiency : F7 on fresh air, M5 on return air)
4 –built-in electric box complete with controller (and remote user interface)
5 –self-supporting panels
This unit may be integrated with traditional heating and cooling systems, but it can operate also autonomously if equipped
with the proper accessories.
.
Fig. 1

MIUM0018_REV06_ QRCE_20180312-MIUM-ENG-AQ AQ_001523_02_0721
5
ENG
• This manual together with separate wiring diagram and control instructions (supplied with the unit) must be kept in a dry
place and ready to hand for future consultation when required.
• This manual has been compiled to ensure that the unit is installed in the correct way and to supply comprehensive
information about how to correctly use andservice the appliance. Before proceeding with the installation phase, please
carefully read all the information in this manual, which describes the procedures required to correctly install and
use the unit.
• Unit installation shall be done according to the laws in force in the country where unit will be placed.
• Manumission of electrical or mechanical parts of the unit will VOID THE WARRANTY.
• Check the electrical specifications on the identification plate before making the electrical connections. Read the
instructions in the specific section where the electrical connections are described.
• If the unit must be repaired for any reason, this must only be done by a specialized assistance center recognized by the
manufacturer and using genuine spare parts
• The manufacturer also declines all liability for any damage to persons or property deriving from failure of the information
in this manual to correspond to the actual machine in your possession.
• Proper use : forced air renewal with heat recovery in working environment as previously specified. Any use
differing from this proper use or beyond the operating limits indicated in this manual is forbidden unless
previously agreed with the manufacturer.
• The prevention of the risk of fire/injury at the installation site is the responsibility of the end user and/or installer.
Verify, upon acquisition, that the unit is complete and supplied as described.
Any eventual disputes must be presented in writing within 8 days from the reception of the goods.
Each unit is provided with identification plate listing the following:
•Address of Manufacturer
•“CE” Mark
•Model
•Serial Number
•Date of production
•Code
•Max input current [A] (for basic unit)
•Max input power [W] (for basic unit)
•Power supply [V-ph-Hz]
•Nominal (supply) airflow rate [m3/h]
•External static pressure [Pa] (for basic unit)
•Sound power level [dB(A)]
•Operative range (as air temperature & RH)
•Power supply [V-ph-Hz] for possible electric heater
•Max input current [A] for electric heater
•Max input power [W] for electric heater

MIUM0018_REV06_ QRCE_20180312-MIUM-ENG-AQ AQ_001523_02_0721
6
ENG
2–DIMENSIONS AND WEIGHTS
2.1 Dimensions (horizontal version unit)
The following table, referred to the figure, shows dimensions and weights of QRCE series (horizontal version) and its
accessories.
Horizontal configurations
A : supply air at right side looking at the electrical panel (like in the drawing above)
B: supply air at left side looking at the electrical panel
Model
500
1000
1500
2000
3000
4000
L
mm
1350
1470
1850
1850
2150
2150
W
mm
680
820
1030
1460
1460
1840
H
mm
330
370
455
455
590
590
W1
mm
760
900
1110
1540
1540
1920
X
mm
230
300
390
600
590
780
Y
mm
225
265
350
350
485
485
E
mm
52.5
52.5
52.5
52.5
52.5
52.5
F
mm
46
46
46
46
55
55
G
mm
128
130
158
170
170
170
D1
mm
1/2" M
D2
mm
3/4" M
3/4" M
3/4" M
3/4" M
1" M
1" M
L1
mm
350
400
400
400
502
502
L2
mm
340
380
460
460
580
580
Weight (basic units)
kg
85
105
175
230
290
360
Weight (CCS/CDX)
kg
28/28
31/31
35/35
42/42
52/52
58/58
Weight (PLM)
kg
21
23
26
30
39
44
QRCE
PLM
CCS
(CDX)
D2
D2
Fresh air
Supply air
Return air
Exhaust air

MIUM0018_REV06_ QRCE_20180312-MIUM-ENG-AQ AQ_001523_02_0721
7
ENG
2.2 Dimensions (vertical version unit)
The following table, referred to the figure, shows dimensions and weights of QRCE series (vertical version) and its
accessories.
Vertical configurations
C : supply air at lower and right side looking at the electrical panel (like in the drawing above)
D: supply air at lower and left side looking at the electrical panel
Model
500
1000
1500
2000
3000
4000
L
mm
1350
1470
1850
1850
2150
2150
H
mm
680
820
1030
1460
1460
1840
W
mm
330
370
455
455
590
590
X
mm
230
300
390
600
590
780
Y
mm
225
265
350
350
485
485
E
mm
52.5
52.5
52.5
52.5
52.5
52.5
F
mm
46
46
46
46
55
55
G
mm
128
130
158
170
170
170
D1
mm
1/2" M
D2
mm
3/4" M
3/4" M
3/4" M
3/4" M
1" M
1" M
L1
mm
350
400
400
400
502
502
L2
mm
340
380
460
460
580
580
Weight (basic unit)
kg
85
105
175
230
290
360
Weight (CCS/CDX)
kg
28/28
31/31
35/35
42/42
52/52
58/58
Weight (PLM)
kg
21
23
26
30
39
44
QRCE
CCS
(CDX)
Fresh air
Supply air
Return air
Exhaust air

MIUM0018_REV06_ QRCE_20180312-MIUM-ENG-AQ AQ_001523_02_0721
8
ENG
3–HANDLING,TRANSPORT AND STORAGE
3.1 Packing
Each unit is put on bench and covered with cardboard packaging; the packaging shall remain intact until the moment of
installation. It is allowed to stack up max one similar unit or a smaller one over the ground unit.
Optional or optional sections not mounted for technical reason (for instance, in order to avoid damage of protruding parts)
are supplied in fitted packing fixed externally or internally to the unit.
Recycle and dispose of packing material in conformity with local regulations, be extremely careful not to damage the unit
and the environment.
3.2 Handling
Comply with the current safety regulations concerning the equipment to use when handling the unit or the required ways
of operating. Use single protection devices as goggles, gloves, helmets… when handling the unit to avoid risk of injuries.
For the lifting, use hand pallet truck or forklift truck, by forking the bench (fig. 2).
Each individual unit weight is shown in this manual (Chap. 2).
While moving, try to avoid rotation without control.
Check the weight of the unit before moving and handling. Handle the packed unit with care and avoid shocks and jolts;
they may damage functional parts of the unit.
To safeguard persons and property, read the information on the packing that covers the unit before handling.
Also make sure to :
• Handle the unit to the installation place or to the store with the packaging intact
• Do not stack other objects on top of the unit
Before placing the unit, take into account overall dimensions and the technical spaces of the whole air system in order to
make electric, air and water connections easy and accessibility unimpeded.
Neglecting these aspects may decrease performance and operational life of the unit and therefore increase the
operating costs and maintenance.
Unit is designed to be installed INSIDE or OUTSIDE (roof cover needed), fixed to suitable supporting structures.
Before installing the unit be sure that :
• the location is in a safe accessible place
• the framework or the floor or the ceiling is adequate to support the weight of the unit and its possible options (see previous
Chap. 2)
• support points are leveled and aligned
• installation place can't be subject to flooding
• fresh air intake and exhaust air outlet shall be free and not clogged (for instance, by snow, leaves, etc.)
Fig. 2

MIUM0018_REV06_ QRCE_20180312-MIUM-ENG-AQ AQ_001523_02_0721
9
ENG
3.3 Check at reception
Upon reception of the unit, we suggest that a complete control is carried out, to verify that the unit is intact and complete,
and no damage has been sustained during transport. Any eventual damage revealed must be communicated to the carrier,
demonstrating the reserve clause within the transport documents, specifying the type of damage.
3.4 Storage
In the event that received unit is not sent to installation place directly but stored, it shall be stored in its package in a dry
place, far from sun, rain, heat sources, sand and wind.
Comply with the storage conditions given below :
• do not stack the units over the limit described on previous par. 3.1
• environment temperature range : min -20°C ÷ max +60°C
The Manufacturer declines any responsibility for damage due to a bad storage.
4–INSTALLATION &CONNECTION
4.1 Definitions
CUSTOMER –The Customer is the person, activity or the society, that has bought or hired the unit, and intends to utilize
the machinery for its intended use.
USER / OPERATOR –The User or Operator is the actual person that has been authorized by the Customer to utilize the
unit.
QUALIFIED PERSONNEL - Defined as the person who has followed a relevant specific course of study, and so is able to
understand the dangers derived from the use of the machinery, and in turn, due to this, are capable of solving major
dilemmas.
Safety regulations
•Qualified personnel must carry out the installation.
•During the installation operation, use protective clothing.
•During the installation operate in absolute security, pollution free air and in an area free of obstructions.
•Respect the regulations in force in the country in which the apparatus is being installed. Specifically relative to its
use, and to the disposal of packing and products used for the cleaning and maintenance of the unit. Respect the
recommendations given by the producers of such products.
•Avoid contact with moving/rotating parts.
•In the event of scheduled or not scheduled maintenance, first disconnect power supply.
•The maintenance and the substitution of damaged or consumed parts must be carried out only by specialized
personnel, following the indications found within this manual.
•Spare parts must correspond to the requirements specified by Manufacturer.
N.B. The installer and the user of the apparatus must take into account, and solve problems, connected with any other
type of risk that may occur to the unit. For example, risks derived from the entrance of foreign bodies, or risks due to the
presence of flammable or toxic gas.
The Manufacturer declines any responsibility for failure to respect the Safety Regulations and the prevention
as described below.
Furthermore, the Manufacturer declines any responsibility for damage caused by the improper use of the unit
and/or modifications carried out without proper authorisation.

MIUM0018_REV06_ QRCE_20180312-MIUM-ENG-AQ AQ_001523_02_0721
10
ENG
4.2 Preliminary operations
•Be sure of perfect functionality of all components of the unit.
•Check that unit is provided with installation instructions and with its ordered options.
•Move the unit and its possible optional sections to the installation place as close as possible.
•Do not put tools or weights inside the unit or on the top of it.
•In case of vertical version, unit is anyway delivered as horizontally layed on bench and provided with separate
support feet & assembling kit (washers and M6 bolts,that need 5 mm Allen key); these feet shall be preventively
bolted on the side of the unit as shown in the sequence of figg. 3, 3a and 3b :
Fig. 3b
Fig. 3a
Fig. 3

MIUM0018_REV06_ QRCE_20180312-MIUM-ENG-AQ AQ_001523_02_0721
11
ENG
•Once support feet are mounted, unit shall be turn to be placed vertically; for this purpose, use the upper
longitudinal bracket and operate as shown on fig. 4a. The rotation of the unit shall be done in complete safety
condition.
•With roof cover (supplied to be mounted), once unit is in vertical position, remove the screws fixing the upper
bracket and the same screws on the other upper side; do not use the bracket, put the roof cover on the top panels
and, by reusing all the screws and the rubber washers supplied together with the roof cover, fix the roof cover
(fig. 4b).
4.3 Requirements of the place of installation and installation of basic unit
•Framework supporting the unit (and its possible options) shall be suitable to to support the whole weight; position
of supporting points (horizontal version) are shown on fig. 5.
QRCE Model
N° of support points to be used
500
4 at corner points
1000
4 at corner points
1500
4 at corner points + 2 in the middle
2000
4 at corner points + 2 in the middle
3000
4 at corner points + 2 in the middle
4000
4 at corner points + 2 in the middle
Fig. 5
Fig. 4a
Fig. 4b

MIUM0018_REV06_ QRCE_20180312-MIUM-ENG-AQ AQ_001523_02_0721
12
ENG
•Position the unit in a point where the condensation discharge may occur easily; give a 3° min slope towards the
point of water discharge; this requirement applies to both horizontal and vertical version.
•Leave minimum gap spaces as shown on following figg. 6 and 7. They are needed for fully accessibility to the
unit in order to carry out all services in safety condition.
Fig. 6
Fig. 7

MIUM0018_REV06_ QRCE_20180312-MIUM-ENG-AQ AQ_001523_02_0721
13
ENG
•For horizontal version unit, use M8 threaded bars (or similar) crossing each supporting point of the unit bracket;
always interpose vibration dampers between unit bracket and bars (fig. 8).
•Be sure that unit is leveled both completely closed and with one side filter panel open; each side filter
panel may be removed and remounted easily. If not, adjust opportunely the tightening on the bars.
•For vertical version unit, fix the supporting feet to the floor (or to the supporting framework), by interposing an
antivibration layer (fig. 9); if adjacent to a vertical wall, it is also suggested to block the upper bracket on it, once
moved on the opposite side to that of access doors (see previous fig. 7).
Threaded bar
filettata
Washer
Vibration damper
damperivibrante
Washer
Nut
Locknut
Fig. 8
M8 screw
tesControdado
Washer
Antivibration layer
Fig. 9

MIUM0018_REV06_ QRCE_20180312-MIUM-ENG-AQ AQ_001523_02_0721
14
ENG
4.4 Installation of roof cover (TPR-H, TPR-V, TPR-CH, TPR-CV)
•In the event that roof covers are supplied apart to be mounted later than the unit and/or its external sections
CCS/CDX, it is always possible to install them on the existing unit/sections.
•For external sections CCS/CDX, both horizontal and vertical version, it is supplied a roof cover which, before
coupling unit and section according to the instructions of next 4.5, shall be interchanged with the unit roof element
placed on the coupling side (fig. 9a).
•For mounting roofcover elements, preventively unscrew theM6 screws by a 5 mm Allen key (A in fig. 9b); further,
on vertical unit, the upper bracket (B) shall be removed.
•As first, place the intermediate roof cover plate, fix it by screwing the same M6 screws, preventively provided with
the special rubber washers supplied together with the roof covers.
•The jointing side of each end side roof plates shall be first hooked to the intermediate plate vertical protrusions
by an about 45° rotation, then placed upon the upper panels and finally fixed by M6 screws with rubber washer.
•Complete the installation by sealing the connection lines between element and element.
Fig. 9a
CCS/CDX
CCS/CDX
QRCE
QRCE
Fig. 9b
A
B
A
A
A

MIUM0018_REV06_ QRCE_20180312-MIUM-ENG-AQ AQ_001523_02_0721
15
ENG
4.5 Installation and coupling of external sections CCS/CDX/PLM
•The external sections are directly coupled to the basic unit by air intakes & outlets panels (by supply air/return air
panel for CCS/CDX, by both panels for PLM, depending on PLM purpose); these sections are provided with
brackets for ceiling mounting or support feet (suppliedapart and to be mounted as shown in the sequence of figg.
3, 3a and 3b) for floor mounting. Their weight shall not load the unit.
•Sections are already equipped with a series of perimetric L stirrups with built-in M6 insert; they have to be coupled
to free stirrups to be mounted on the unit in symmetrical positions, by using self-drilling screws kit (fig. 10). This
operation must be carried out before installing the unit.
•Previously apply the gasket (supplied apart to be mounted) on the side of the external section to be coupled to
the basic unit (fig. 10)
•For horizontal version section, use M8 threaded bars (or similar) crossing each supporting point of the section
bracket; always interpose vibration dampers between section bracket and bars (fig. 8).
•For vertical version section, fix the supporting feet to the floor (or to the supporting framework), by interposing an
antivibration layer (fig. 9); if adjacent to a vertical wall, it is also suggested to block the upper bracket on it.
•In case of roof cover, unit side on which is installed will be free of coupling stirrups.
Stirrup with built-in
M6 insert
M6 screw & washer
Self-drilling screw
Stirrup to be mounted
Gasket
Fig. 10
QRCE
CCS
CDX
PLM

MIUM0018_REV06_ QRCE_20180312-MIUM-ENG-AQ AQ_001523_02_0721
16
ENG
4.5.1 Air duct connection layout (multiport plenum PLM)
•PLM plenum is provided with n°10 possible air connections of which n° 6 closed by insulated plates (A) fixed by
selfdrilling screws, as shown on fig. 10a.
•in order to get the desired air inlet/air outlet layout, move opportunely and block again the plates on the
connections really not used; do this before positioning the plenum.
4.6 Air duct connections
•The air ducts must be correctly sized, in order to match unit external static pressure at duty airflow rate; take also
into account the air pressure drop of possible options.
•In order to prevent water condensation and to reduce noise to the rooms, it is strongly suggested to install
insulated air ducts or provide a duct insulation.
•Consider the need to install sound attenuators depending on unit sound level and the required acoustic comfort
of the room to be treated.
•Between unit and air ducts always install suitable flexible joints; anyway, the electrical continuity must be ensured
between air ducts (if metal type) and unit by a ground cable.
•Air duct weight shall not load the unit or its possible external sections.
IMPORTANT: DO NOT OPERATE THE UNIT IF FAN OUTLETS ARE NOT DUCTED OR NOT PROTECTED BY
SAFETY GRID.
Fig. 10a

MIUM0018_REV06_ QRCE_20180312-MIUM-ENG-AQ AQ_001523_02_0721
17
ENG
4.6.1 Installation of damper (SKR1, SKR2 supplied apart)
•Each damper is provided with holes on its coupling flange and supplied kit composed of adhesive perimetric
gasket (A) and selfdrilling screws (B), as shown on fig. 10b.
•Apply the gasket all around the perimeter of the flange, place the damper in correspondence with the interested
air intake/outlet so that its shaft is accessible and can't interfere with unit access doors or other functional
elements, then fix by the selfdrilling screws.
4.7 Water and refrigerant connections
The installation and connecting of the piping is an operation that must be done correctly, otherwise it may compromise the
performance of the system. At worst it may cause irreversible damage to the machine. These operations are to be
effectuated by qualified personnel.
4.7.1 Condensation outlet connection (QRCE, CCS, CDX)
•Provide each point of condensation discharge with suitable drain trap, that shall be filled with water before starting
up the unit.
•The drain trap shall be done as shown on fig. 11.
•The drain trap must have a tap for correct cleaning of the lower part, and must allow an easy disassembly.
•The path of the condensation drainage tube must always have a gradient toward external and shall not interfere
with servicing
•Support the weight of discharge piping so as not to load the discharge junction on the unit/external section.
Fig. 11
Fig. 10b

MIUM0018_REV06_ QRCE_20180312-MIUM-ENG-AQ AQ_001523_02_0721
18
ENG
4.7.2 Water coil connection (CCS)
•Water coil is provided with GAS male threaded connections.
•The tightening must be carried out with extreme care to avoid damage to the copper headers.
•The path of piping shall not interfere with scheduled and not scheduled maintenance operations.
•Follow instructions of IN plate and OUT plate to connect water inlet and water outlet respectively; different
connections may lead to heating/cooling performance reduction.To optimize the performance, air inlet side
shall be opposite to water inlet side.
•Provide an air valve at the top of the piping (higher than unit top side), and a water discharge valve at the
bottom of the piping.
•Support water piping so as not to load the coil headers.
•Once connections are done, fix both annular external gaskets to avoid air leakage.
•In the event of operation at very low air temperature, fill the water circuit with antifreeze; the same shrewdness
shall be carried out in the event of plant shut-off long periods at very low air temperature, if the water plant is not
emptied.
•In the event of plant shut-off for scheduled or not scheduled maintenance, close the inlet and outlet manual cut
off valves; furthermore, empty all the water drain trays.
4.7.3 Direct expansion coil connections (CDX)
•Just use copper pipes suitable for R410A refrigeration and size them according to the following table; all pipes
shall be preventively clean with nitrogen or dry air and shall be free from moisture.
•Freon coil is provided with welded plugs and filled and pressurized by nitrogen (the upper plug is covered by
insulation, it shall not be connected to the refrigerant circuit but sealed permanently); while removing the
plugs, be sure that coil is still pressurized, otherwise it could have leakage points. In this event, do not repair
the coil by yourself but ask for a spare section.
•Go on welding the connections in a workmanlike.
4.8 Electrical connections
•Electrical connections to main board shall be carried out by qualified personnel only.
•Insure that voltage and frequency shown on CE unit plate match those of connecting power supply.
•For the main power supply of the unit and its possible accessories, the use of adapters, multiple plugs and
extension leads shall be avoided.
•It is the responsibility of the installer to insure that the installation of the unit is as close as possible to
the main power supply, or sufficiently close to protect the electrical parts.
•Connect the unit to an efficient power point, by using the glands near the electric box panel and the screw clamps
(for connection to PCB) and spring clamps (for connection to terminal), inside the electric box.
CDX Model
ODS Connections [mm]
Liquid line/Gas line
500
8/8
1000-1500-2000
12/16
3000
16/22
4000
22/28
Before starting any operation, be sure that main power supply is switched off.
All power lines must be properly protected at the source by the installer.
Follow the connection of the unit and its accessories using adequate cabling for the power used, and
respecting the country regulations. The dimensions of the cabling must be sufficient to support a voltage drop
in start up phase inferior to 3% of the nominal.
.

MIUM0018_REV06_ QRCE_20180312-MIUM-ENG-AQ AQ_001523_02_0721
19
ENG
5–WIRING DIAGRAMS
Each unit is provided with internal wiring diagram, characterized by specific code. To match code and unit model see the
following table :
QRCE Model
Wiring diagram code
500
AMF0008070
1000-1500-2000
AMF0008071
3000-4000
AMF0008072
In the back of electrical box panel it is also printed the basic unit external wiring diagram, connection to be carried out by
the installer; wiring diagrams of options are shown on specific sections of Control Manual (see next Chap. 6).
6–ELECTRONIC CONTROL
Follow instructions of Control Manual supplied with the unit (document code MC00009, valid for all QRCE models).
7–SCHEDULED AND NOT-SCHEDULED MAINTENANCE
•It is the responsibility of the User to carry out all types of maintenance operations.
•Only personnel previously trained and qualified may carry out maintenance operations.
•Should the unit require disassembly, hand and body protections are required.
Maintenance keeps unit efficiency, reduce the speed of deterioration over time and collect information and data to
understand the efficiency of the unit and prevent failures. We suggest to prepare a booklet of installation according
European legislation. Provide a machine book that allows you to track of the actions taken on the unit, so it will be easier
to cadence adequately the various interventions and will facilitate a possible troubleshooting.
Please take note of: date, type of action, description of action, measurements performed, anomalies identified, alarms
registered in the alarm history, etc. ...
7.1 Scheduled monthly check
7.1.1 Air filters
Air filters are placed close to unit air inlets and are usually accessible :
•for horizontal unit, by lower hinged doors provided with recessed handles and kept closed by blocking devices (by
these doors maintenance is both for filter and fan; fig. 12a)
•for vertical unit, by front hinged doors provided with recessed handles and kept closed by blocking devics (by these
doors maintenance is both for filter and fan; fig. 12b)
Other special access to filter is also possible :
•for horizontal unit, by removing an end side panel provided with recessed handle (fig. 13a)
•for vertical unit, by removing an upper end panel provided with recessed handle (fig. 13b)
BEFORE SERVICING THE UNIT, SWITCH OFF THE MAIN POWER SUPPLY.

MIUM0018_REV06_ QRCE_20180312-MIUM-ENG-AQ AQ_001523_02_0721
20
ENG
Once the door is open, the slipping of filter elements is prevented by a filter locking plate to be turned 90°(use a Phillips
head screwdriver); after remounting filter elements, turn the locking plate in the opposite direction to the contact with filter
frame, then block it (fig. 12c) :
Fig. 12a
Fig. 12b
Fig. 12c