Lennox EMEA MAXIAIR MXP-HPW User manual

www.lennoxemea.com
MAXIAIR MXP-HPW &HPWi
5000 - 13500 m3/h
INSTALLATION, OPERATING
AND MAINTENANCE
MAXIAIR MXP-HPW&HPWI-
IOM-1905-E
HEAT RECOVERY UNIT WITH ENTHALPIC THERMAL WHEEL,
COMBINED TO HEAT PUMP SYSTEM
HPWi : With Inverter compressor

• 1 •
1. 2
2. 2
3. 4
4. MXP-HPW / HPWI 4
5. 5
5.1 5
5.2 6
5.3 6
6. 9
7. 9
8. 9
8.1 9
8.2 9
8.3 10
9. 10
9.1 10
9.2 11
9.3 11
9.4 11
9.5 12
9.6 12
10. 16
11. 17
12. 18
13. BIOXIGEN®19
14. 23
14.1 24
14.2 24
14.3 26
14.4 27
14.5 27
14.6 28
14.7 28
15. 30
15.1 30
16. 33
17. 35
18. 35
Installation Manual • MAXIAIR MXP-HPW & HPWI-IOM/1905-E
Important
Before performing any operation of the machine carefully read, understand and follow all instructions
listed in this manual
SYMBOLS USED
WARNINGS AND GENERAL RULES
PRESENTATION OF THE MANUAL
TECHNICAL SPECIFICATIONS
General characteristics
Unit technical data
Conguration, dimensions and weights
CHECKS BEFORE SHIPMENT
TRANSPORT
UNLOADING
Checks upon receipt
Hoisting and handling
Storage
INSTALLATION AND START UP
Denitions
Safety Standards
Preliminary information
Installation location and unit positioning
Connection to air ducts
Water connections
REFRIGERANT CIRCUIT
ELECTRIC CONNECTIONS
CHECK BEFORE START-UP
ELECTRONIC CONTROL
Control panel
Setting
Remote on/off start up o time bands
Electronic expansion valve management
Building Management System (Modbus RTU protocol)
Defrost mode
External positioning of control panel
MAINTENANCE
Maintenance instructions
TROUBLESHOOTING
SAFETY STANDARDS
DISPOSAL

• 2 • Installation Manual • MAXIAIR MXP-HPW & HPWI-IOM/1905-E
1. SYMBOLS USED
The machine has been designed and constructed according to the current norms and consequently with mechanical and
electrical safety devices designed to protect the operator or user from possible physical damage.
Residual risks during use or in some intervention procedures on the device are however present. Such risks can be
reduced by carefully following manual procedures, using the suggested individual protection devices and respecting the
legal and safety norms in force.
The most important information concerning safety and proper use of the machine are accompanied by some symbols to
make them highly visible:
Warning
Danger
Danger risk of electric shock
Attention only authorised staff
Prohibition
2. WARNINGS AND GENERAL RULES
This instruction book is an integral part of the appliance and as a consequence must be
kept carefully and must ALWAYS accompany the appliance even if transferred to other
owners or users or transferred to another plant. If damaged or lost, request another copy
from the Manufacturer.
Repair and maintenance interventions must be carried out by authorised staff or staff
qualied according to that envisioned by this book. Do not modify or tamper with the ap-
pliance as dangerous situations can be created and the appliance manufacturer will not
be liable for any damage caused.
After having removed the packaging ensure the integrity and completeness of the con-
tent. If this is not the case, contact the Company that sold the appliance.
The appliances must be installed by enabled companies which, at the end of the job
issues a declaration of conformity regarding installation to the owner, i.e. in compliance
with the Standards in force and the indications supplied in this book.
Any contractual or extracontractual liability of the Manufacturer is excluded for injury/
damage to persons, animals or objects owing to installation, regulation and maintenance
errors or improper use.
IMPORTANT NOTES
The heat recovery unit is a machine designed and built exclusively to change air in the civil environments, incompatible
with toxic and inammable gases. Therefore it cannot be used in those environments where the air is mixed and/or
altered by other gaseous composites and/or solid particles.
The use of the same for different purposes from those envisioned, not conform to that described in this manual, will make
any direct and/or indirect liability of the Manufacturer automatically become null and void.

• 3 •Installation Manual • MAXIAIR MXP-HPW & HPWI-IOM/1905-E
We remind you that the use of products that employ electrical energy and water requires that a number of essential
safety rules be followed, including:
This appliance must not be used be children and unaided disabled persons.
It is prohibited to touch the appliance when you are barefoot and with parts of the body
that are wet or damp.
It is prohibited to perform any maintenance or cleaning operation before having discon-
nected the appliance from the mains electricity network, by positioning the plant master
switch at «off»
It is prohibited to modify the safety or adjustment devices without the manufacturer’s
authorisation and precise instructions
It is prohibited to pull, detach or twist the electrical cables coming from the unit even if it is
disconnected from the electrical mains
It is prohibited to climb onto the unit, sit on it and/or rest any type of object on it.
It is prohibited to spray or jet water directly onto the unit.
It is prohibited to open the doors for accessing the internal parts of the appliance without
rst having switched off the master switch of the «system».
It is prohibited to disperse, abandon or leave the packing materials within the reach of
children, as they are a potential source of danger
IMPORTANT NOTES
As our Company is constantly involved in the continuous improvement of its production, aesthetic characteristics and
dimensions, technical data, equipment and accessories can be subject to variation. For this reason the manufacturer
reserves the right to make any changes without prior notice.

• 4 • Installation Manual • MAXIAIR MXP-HPW & HPWI-IOM/1905-E
3. PRESENTATION OF THE MANUAL
This manual describes the rules for the transportation, the installation, the use and the maintenance of the heat recovery. The
user will nd everything that is normally useful to know for a correct and safe installation of MXP-HPW and MXP-HPWI air
treatment units.
The non-observance of what is described in this handbook and an inadequate installation of the unit may cause the
cancellation of the guarantee that the Manufacturing Company grants on the same one. The Manufacturing Company,
moreover, does not answer to possible direct and/or indirect damages due to wrong installation carried out by inexpert and/or
non-authorised staff. At the moment of the purchase, check that the machine is integral and complete. Claims will have to be
produced within 8 days from the reception of the goods.
4. MXP-HPW / HPWI
MXP-HPW and MXP-HPWI fresh air handling units are distinguished by twin heat recovery system, by rotative enthalpic
recovery and refrigerant reversing cycle, which helps to reduce the installed power. Thanks to scroll compressors (n°1
variable ow inverter driven type + n°1 ON /OFF type on HPWI version) and EC motor fans, the purpose of heat loads &
ventilation control is always to achieve as the highest system efciency as the highest reduction of energy consumption
and pollutant emissions.
These units, equipped with the needed additional treatment optional systems, may be a stand-
alone plant solution or can well integrate central heating/cooling systems, both series and
parallel layout.
The models of MXP-HPW and MXP-HPWI series can be tted with a ionization system of
the air called BIOXIGEN®. This system, unique in his type, makes the air and surfaces of the
machine, of the ducts and of the bordering rooms healthy and good smelling.
5. GENERAL CHARACTERISTICS
5.1 General characteristics
• Frame made from extruded Anticorodal 63 aluminium alloy bars, connected by 3-way reinforced nylon joints
• Sandwich panels, 48 mm thickness, galvanized sheet metal inner skin and precoated (RAL 9002) sheet metal outer
skin; 45 kg/m3 density foamed polyurethane as heat and sound insulation
• Filtering sections at both air intakes and already tted with pressure switch, complete with 98 mm thickness ISO
16890 ePM10 50% (G4 EN 779) efciency cell prelters and (on fresh air intake); ISO 16890 ePM1 50% (F7 EN
779) efciency rigid bag lters, extractable from side removable panels.
• EC motor direct driven backward curved plug fans; speed control electronics already tted in the motor
• First step of energy recovery by enthalpic rotative high efciency heat recovery, with hygroscopic surface (molecolar
sieve), already equipped with thermal by-pass management by switching off the wheel, for free-cooling / heatingmode
• Second step of energy recovery (dynamic type) by air-to-air R410A heat pump system composed of two electric
driven scroll compressors (each on/off controlled), evaporating and condensating reversible Cu/Al nned coils,
electronic expansion valves, liquid receivers, 4-way reversible valves, high and low pressure switches, biow freon
lters, liquid indicators; single variable ow inverter driven scroll compressor as an option in place of standard ones
• Built-in electric box to control power loads, NTC temperature sensors on both air circuits, electronic controller to
control room temperature (supply temperature in case of variable ow compressor), free-cooling, heating/cooling
mode and defrost cycles; on board control panel.
With SCMB option, Modbus RTU protocol for Building Management System

• 5 •Installation Manual • MAXIAIR MXP-HPW & HPWI-IOM/1905-E
(1) fresh air/supply air circuit
(2) return air/exhaust air circuit
(3) winter mode (outside -5°C 80% RH, inside 20°C 50% RH)
(4) summer mode (outside 32°C 50% RH, inside 26°C 50% RH)
(5) fans and adiabatic pump absorbed power included
5.2 Unit Technical Data
MODEL 350 500 700 1000 1350
Nominal air ow rate m³/h 3500 5000 7000 10000 13500
Nominal external static pressure Pa 400 400 400 400 400
Maximum external static pressure Pa 530 590 620 590 530
Sound pressure level (1) dB (A) 60 62 63 62 66
OPERATING LIMITS 350 500 700 1000 1350
Winter operating limits standard version (2)
°C / %
Min -10° C OUT & Min 19°C 50% IN
Winter operating limits with RMS option (2) Min -15° C OUT & Min 19°C 50% IN
Summer operating limits standard version (2) Max 38°C 50% OUT & Max 27°C IN
Airow change range HPW ± 10%
HPWI - 30% ... +10%
UNIT ELECTRICAL FEATURES 350 500 700 1000 1350
Electrical supply V/ph/Hz 400 / 3+N / 50
Max input power kW 10 14 20 27 38
Full load amperage A16 22 32 43 61
HEATING CAPACITIES (3) 350 500 700 1000 1350
Static recovery efciency %81.9 79.4 76.9 78 78.7
Total heating capacity kW 47.4 66,2 94.7 134.2 189.6
Heat pump capacity kW 13.2 19.3 31.3 42,5 64.4
Unit COP (4) W/W 13.9 11.9 10.4 11.5 11.3
Supply air temperature °C 28 28 29 27 30
COOLING CAPACITIES (5) 350 500 700 1000 1350
Static recovery efciency %81.5 78.9 76.7 77.5 78.2
Total cooling capacity kW 26.3 34.6 53.4 74.9 98.4
Cooling capacity kW 16.4 22.2 36.5 51.4 65.7
Unit EER (4) W/W 6.3 5.4 5.1 5.6 5.4
Supply air temperature °C 18 19 18 19 18
REFRIGERANT CIRCUIT 350 500 700 1000 1350
Refrigerant - GWP R410A - 2088
Compressors - circuits number 2 - 2 2 - 2 2 - 2 2 - 2 2 - 2
Refrigerant lling kg
CO2equivalent Ton

• 6 •
RIPRESA
RETURN
MANDATA
SUPPLY
RINNOVO
FRESH AIR
ESPULSIONE
EXHAUST
ACCESSORIO SEZIONE SBRINAMENTO 3 SERRANDE - RMS
OPTION DEFROSTING 3 DAMPERS MIXING CHAMBER - RMS
C
B
VANO TECNICO CIRCUITO FRIGO E QUADRO ELETTRICO
REFRIGERANT CIRCUIT AND ELECTRICAL BOARD CASING
LATO ISPEZIONE VENTILATORE MANDATA E RECUPERATORE
SUPPLY FAN AND HEAT RECOVERY INSPECTION SIDE
LATO ISPEZIONE FILTRI, CIRCUITO FRIGO, QUADRO ELETTRICO, VENTILATORE RIPRESA
FILTERS, REFRIGERANT CIRCUIT AND ELECTRICAL BOARD INSPECTION SIDE
A
E
B3 B1 B2B1
D
F
211375
1 4 6 98 10
Installation Manual • MAXIAIR MXP-HPW & HPWI-IOM/1905-E
5.3 Conguration, dimensions and weights
MODEL 350 500 700 1000 1350
Amm 3935 4035 4035 4235 4235
Bmm 1550 1750 1850 2150 2450
B1 mm 410 510 510 710 810
B2 mm 165 165 165 165 165
B3 mm 305 305 305 305 305
Cmm 1660 1660 2000 2190 2390
Dmm 1070 1250 1250 1700 2000
Emm 3025 3025 3025 3225 3225
Fmm 3385 3385 3385 3585 3585
Weight kg 1400 1550 1900 2200 2500
Ø S in 1" M 1" M 1" ¼ M 1" ¼ M 1" ¼ M
KEY
1Pre-lter and ne lter on fresh air
2Filter on return air intake
3Thermal wheel heat recovery
4Supply fan
5Exhaust fan
6Condenser-evaporator
7Evaporator-condenser
8Compressor
9Bioxigen module
10 Electric or water additional heater
11 Built-in electrical board
Important
“F” dimension is the standard unit
length; “A” dimension is the unit
length with RMS option.
ØSDrain
EXHAUST AIR
SUPPLY
FRESH AIR
RETURN
3 DAMPERS MIXING CHAMBER FOR DEFROSTING
RMS OPTION
SUPPLY FAN AND HEAT RECOVERY
INSPECTION SIDE
REFRIGERANT CIRCUIT AND ELECTRICAL BOX

• 7 •Installation Manual • MAXIAIR MXP-HPW & HPWI-IOM/1905-E
WALL MOUNT REMOTE CONTROL PANEL TUP
TUP option is a remote panel for maximum 50m distance from the unit, by 6 ways telephone cable (not supplied by the
manufacturer, but by the installer). All the informations and the features of the main display on board are repeated on the
remote display.
The remote display is suitable for wall installation: all the informations for wiring and xing are supplied with the remote display.
For the main board wiring see the picture below. Additional board with connector is installed in the unit, if specied in the
order, one additional telephone cable to connect board to controller is supplied.
PCB Modbus connector PCB Modbus
Telephone cable
MODBUS PROTOCOL INTERFACE PCB - SCMB
Module insertable into the control logic already wired to the electrical board, which allows the interface with a supervision
system, to which you can delegate most of the control functions normally charged to the control panel, for example :
- ON / OFF unit
- Speed control fans
- Set-point adjustment
It’s also possible to view all the parameters of operation of the machine.

• 8 •
1300
Installation Manual • MAXIAIR MXP-HPW & HPWI-IOM/1905-E
3 DAMPERS SECTION FOR DEFROSTING WITH ACTUATORS - RMS
Defrosting mode mixing chamber with dampers and servo actuators, that works In winter operation; it optimizes defrost
cycle and the heat pump operating up to -15 °C air temperature, without electric pre-heater.
In case of heat pump defrosting, the logic control swaps the cycle, external dampers closes and recirculation damper
opens. The condenser coil heats up exhaust air so it defrosts also the rotative heat recovery, owing through the
recirculation damper. Warmed air ows through the evaporation coil: this permits a high efciency defrosting operation
reducing its duration and increasing the supply air temperature.

• 9 •Installation Manual • MAXIAIR MXP-HPW & HPWI-IOM/1905-E
6. CHECKS BEFORE SHIPMENT
All the units, before being sent, undergo a series of strict checks, as listed below.
• Dimensional checks to ensure that the actual dimensions of the unit comply with those described in the constructional
drawing undersigned by the customer.
• Visual inspection of the nishes
• Checks to ensure all the components are integral
• Functional test on the electric motors and the humidication pumps
• Visual check to ensure the fan impeller is balanced
• Water seal test on the tanks
• Gasket seal test
• Locking of the dampers in the closing position
• Securing of the coils (medium and large sizes only) for transport, to be released after installation on site.
• Securing of the fan vibration dampers (when considered necessary for the type of transport) which must be released
before starting.
• Check to ensure the unit is supplied with all the materials for assembly on site (hardware, silicon and so on). These
materials, enclosed in a suitable packaging, are placed inside the ventilating section as standard.
• Application of the identication plates.
• Application of the plates marking the discharges, water ttings, power connections, lifting eyebolts.
Upon customer request, a special certicate can be issued relating to the above checks.
7. TRANSPORT
All the units are supplied without packaging. Only upon request, following quotation, packaging is provided in cages,
normal or special water resistant crates, etc...
• The components that, due to technical, constructional, transport or other requirements are not tted on the unit, but
sent separately either inside the unit or otherwise, are specially protected and duly described on the packing list.
• All of the units are divided into constructional sections delivered disassembled; each section can be transported by
truck, with a maximum size of 2400 mm (W) x 2500 mm (H). Upon specic customer request, larger units can be
made for oversized transport.
• Special care is paid during the loading (truck or container) operations.
• All the sections making up the units are handled and stowed using special spacers to protect any protruding parts,
such as coil ttings, handles, hinges and so on.
• Except where otherwise agreed in advance, no other material must be stacked on the products: the manufacturer
declines all liability in the event of damage deriving from such loads.
8. UNLOADING
8.1 Checks upon receipt
When receiving the goods, before unloading, all the material delivered must be checked to ascertain the presence
of any damage caused during transport. Any damage found must be reported to the carrier, accepting the goods with
reservation and specifying the type of damage on the delivery documents.
8.2 Hoisting and handling
The are tted with a base frame and support feet orwith a continuous support base. In both cases, special holes have
been provided to insert lifting pipes for hoisting with cables.
It is strongly recommended :
THE FASTENING OF THE LOAD ON THE TRUCK IS THE RESPONSIBILITY OF THE CARRIER, AND MUST
BE PERFORMED, USING STRAPS OR ROPES, SO AS TO AVOID DAMAGING THE CASING. UNDER NO
CIRCUMSTANCES USE THE WATER FITTINGS OR THE DOOR HANDLES AS ANCHOR POINTS.

• 10 • Installation Manual • MAXIAIR MXP-HPW & HPWI-IOM/1905-E
ATTACH THE CABLES AS SHOWN IN THE FOLLOWING FIGURE, INSERTING SPACERS OF AN ADEQUATE
LENGTH TO PREVENT THE CABLES FROM DAMAGING THE CASING WHEN TIGHTENED
WHEN HANDLING THE UNITS, USE SUITABLE MEANS ACCORDING THE WEIGHTS INVOLVED,
AS ENVISAGED BY EC DIRECTIVE 89/391 AND SUBSEQUENT AMENDMENTS
• The weight of the units is shown on this manual
• Avoid uncontrolled rotations
• Place the goods down with care, avoiding sudden movements or, worse, dropping the goods.
Where the support feet are tted, the units can be handled by fork lift:
8.3 Storage
In the event of extended storage before installation, keep the units protected from dust and bad weather and away from
sources of vibrations and heat.
THE MANUFACTURER DECLINES ALL LIABILITY FOR DAMAGE DERIVING FROM INCORRECT UNLOADING
OR INADEQUATE PROTECTION OF THE UNITS AGAINST THE ELEMENTS.
9. INSTALLATION AND START UP
9.1 Denitions
CUSTOMER - The customer is the person, the agency or the company who bought or rented the unit
USER / OPERATOR - The operator or user is the physical person who uses the unit for the purpose for which it was
designed
SPECIALISTIC STAFF - It is composed by the physical trained persons, able to recognize any danger due to the proper
and improper use of the unit and able to avoid or repair it.
inammable or toxic gases at a high temperature.
• WIDEN THE FORKS AS MUCH AS POSSIBLE SO AS TO BALANCE THE LOAD
• DIP THE ENDS OF THE FORKS TO AVOID DAMAGING THE BOTTOM PANELS.

• 11 •Installation Manual • MAXIAIR MXP-HPW & HPWI-IOM/1905-E
9.2 Safety Standards
• Wear suitable and accident-prevention clothing during installation, for example: goggles, gloves etc. as indicated in
the current regulation
• During installation operate in complete safety, clean environment and free from obstructions.
• Respect the laws in force, in the country in which the machine is installed, relative to use and disposal of packaging
and the products used for cleaning and maintenance of the machine, as well as complying with that recommended by
the producer of these products.
• Before starting the unit, check the perfect integrity of the various components of the entire plant.
• Do not touch moving parts or intervene between these.
• Do not perform maintenance and cleaning until the electric line has been connected.
• The maintenance and replacement of damaged or worn parts must only be performed by specialised staff and
following the indications given in this manual.
• The spare parts must correspond to the requirements dened by the Manufacturer.
• If the heat recovery unit must be dismantled, follow the envisioned anti-pollution standards.
N.B. When using the heat recovery unit, the installer and user must consider and solve all risks connected to theplant. For
example, risks deriving from the entry of foreign bodies or risks due to the conveying of dangerous inammable or toxic
gases at a high temperature.
9.3 Preliminary information
• Work while meeting the current safety regulations, ensuring sufcient space to move and the cleanliness of jobsite
• Wear protective clothing and personal protective equipment (glasses, gloves, etc.)
• Move the packed section as close as possible to the place of installation
• Don’t place tools or other jobsite equipment over the packed unit
• Don’t use the unit as a store of yard tools
• Don’t touch moving parts and don’t use them as supports
• Check the full integrity of all unit components
9.4 Installation location and unit positioning
• Make sure that the support surface is able to support the weight of the unit(units) and will not cause vibrations.
• Make sure that the support surface is perfectly horizontal so as to allow the correct coupling of the various sections, if
necessary, making up the unit.
• Make sure the unit is level, using, if necessary, spacers below the supports, so as to ensure that the doors open
correctly and the pans are drained.
• Never position the unit in rooms where there are ammable gases or acidic, aggressive or corrosive substances that
may irreparably damage the various components.
• Leave a minimum amount of free space around the unit, as shown in the gure, so as to allow for installation,
maintenance and the replacement of components, such as coils, lters etc.
• If the unit is hung from the ceiling, given the weights involved, all the sections that make up the air handling unit must
be connected to the ceiling.
As the motor-fan assembly and the moving parts feature vibration dampers and are dynamically insulated from the structure
by the vibration dampers on the base and the exible joint on the outlet, external vibration dampers are not required.
If, for technical-structural requirements, vibration damping supports are installed between the unit and the support base,
elastic joints must also be used on the water ttings (coils, humidier, drains, etc.) and on the air ttings (air outlets, fan
openings, etc.).
THE MANUFACTURER DECLINES ALL RESPONSIBILITY FOR THE FAILURE TO COMPLY WITH THE
SAFETY AND ACCIDENT-PREVENTION STANDARDS DESCRIBED BELOW.
IT ALSO DECLINES ALL LIABILITY FOR DAMAGE CAUSED BY IMPROPER USE OF THE HEAT
RECOVERY UNIT AND/OR MODIFICATIONS PERFORMED WITHOUT AUTHORISATION.
SPECIALISED STAFF MUST PERFORM INSTALLATION.

• 12 •
MXP-RR
MXP-RR
Installation Manual • MAXIAIR MXP-HPW & HPWI-IOM/1905-E
THE NON-COMPLIANCE OF THE GAP SPACES MAY LEAD TO THE INACCESSIBILITY TO UNIT
COMPONENTS, MAKING THEM IMPOSSIBLE FOR ANY MAINTENANCE.
IMPORTANT: THE UNITS MUST NEVER BE OPERATED IF THE FAN OUTLETS ARE NOT DUCTED OR
PROTECTED BY SAFETY MESH, AS PER THE UNI 9219 AND FOLLOWING STANDARDS.CATIONS
PERFORMED WITHOUT AUTHORISATION.
THE INSTALLATION AND CONNECTION OF THE PIPES ARE OPERATIONS THAT MAY COMPROMISE
THE CORRECT OPERATION OF THE SYSTEM, OR WORSE, CAUSE IRREVERSIBLE DAMAGE TO THE
UNIT. THESE OPERATIONS MUST BE PERFORMED BY SPECIALIST PERSONNE.
9.5 Connection to air ducts
9.6 Water connections
• Size air ducts depending of air plant and unit external static pressure (including possible additional air resistances
due to duct sections, sound attenuators, etc.); air resistance higher than unit ESP causes a reduction of airow rate
and a consequent reduction of heat pump e󰀩ciency
• Use insulated as far as possible ducts, to reduce heat loss, to mitigate the noise into the room and to prevent
condensation
• Avoid abrupt deviations or curved air ducts on unit air outlets
• Interpose anti-vibration and exible connections between unit and air ducts, anyway, ensure electrical continuity
between unit structure and air duct (if metallic)
• Avoid air supplied directly into the room and air expelled directly into the atmosphere; prefer short or long duct
connection
• Compare unit sound level to the required room acoustic comfort and, if necessary, install suitable sound attenuators
• For each outlet, the condensate pipeline shall be provided with a syphon to prevent the entry of odors
• Each syphon shall be sized according to instructions on g. 3
• Each syphon shall be provided with a cap for cleaning or shall be easy to remove; prime each syphon before starting up
• Condensate pipeline shall have a fall out
• Check that pipeline doesn’t stress condensate outlet connection

• 13 •
MXP-RR
Installation Manual • MAXIAIR MXP-HPW & HPWI-IOM/1905-E
THE WATER INLET AND OUTLET MUST BE FITTED SO AS TO ALLOW COUNTER-CURRENT HEAT
EXCHANGE BETWEEN THE AIR AND THE FLUID (WATER OR WATER AND ANTI-FREEZE MIXTURE),
WITH THE INLET AT THE BOTTOM AND THE OUTLET AT THE TOP. FOR THIS REASON, APPROVAL
IS ALWAYS REQUIRED OF THE CONSTRUCTIONAL DRAWINGS THAT HIGHLIGHT THE SIDE OF THE
FITTINGS. MOREOVER, THE UNITS ARE FITTED WITH SPECIAL PLATES THAT INDICATE THE WATER
INLET AND OUTLET.
WARNING: ALWAYS USE TWO SPANNERS WHEN TIGHTENING THE COIL FITTINGS TO THE PIPES, SO
AS TO AVOID STRESS (TORSION, THRUST) THAT MAY DAMAGE THE MANIFOLDS INSIDE THE UNIT.
WARNING: ALWAYS CHECK THE HYDRAULIC SEALING OF THE ENTIRE CIRCUIT (INCLUDING THE
COILS ON BOARD UNIT) BEFORE STARTING-UP THE UNIT, PARTICULARLY IF THE LATTER IS
INSERTED IN NICHES OR FALSE CEILING. IF YOU DO NOT PERFORM THESE CHECKS, WE DISCLAIM
ANY RESPONSIBILITY FOR POSSIBLE DAMAGES.
9.6.1 Water coils hydraulic connections
• The installation and connection operations of the pipes are operations that can compromise the good functioningof
the plant or worse, cause irreversible damage to the machine. These operations must only be performed by
specialisedstaff
• The section with water coil is supplied with «male» connections with gas threading
• Tightening must be performed carefully to prevent damage to the copper collectors in the coil
• The path of the pipes must be designed so as not to create obstacles when removing the coil or the lter from the unit
and to guarantee access to the inspection doors.
• Water inlet/outlet must be such to allow countercurrent heat exchange: follow the indications of the WATER INLET
and WATER OUTLET plates
• Envision a high vent valve and a low discharge valve
• Clamp the pipes adequately to the outside of the section to prevent the weight being unloaded onto the coil
• When connection has been made, push the external gasket well against the panel to prevent seepage of air
• Insulation must be ush to the panel in order to prevent the danger of condensation
• Envision on-off valves to isolate the coil from the rest of the circuit in the case of extraordinary maintenance
• In the case of installation in particularly cold areas, if the use of an electric anti-freeze device or the addition of anti-
freeze (glycol) to the water are not envisaged, empty the system when it remains inactive for extended periods.

• 14 • Installation Manual • MAXIAIR MXP-HPW & HPWI-IOM/1905-E
9.6.2 Humidier hydraulic connection with electrode steam generator
• Install the unit at a height that allows easy access to the inside of the humidier for cylinder replacement.
• Some parts of the humidier, during operation, can exceed the temperature of 60 ° C. Make sure that the surfaces in
contact with it are compatible with these values.
• Do not install and use the humidier in the nearnessa of products or objects that may be damaged in contact with
water or moisture produced.
• Avoid housing in the same conduits, power cables with signal cables (probes and digital inputs).
• Reduce the lengths of the connecting cables as much as possible, avoiding that the wiring takes up the spiral shape
which is harmful to possible inductive effects on the electronics. Install a magneto thermal protection switch upstream
of the humidier.
• All conductors used in the wiring must be appropriately proportioned to support the load they are to supply.
• If it is necessary to extend the probe, it is necessary to use conductors with a suitable cross-section and in any case
not less than 1 mm2.
• Connect the water drain with a pipe no less than 40 mm in diameter, which does not generate bottlenecks, which
does not exceed the level of the drain hose at any point of the route.
• Use only water for food with a pressure between 1 and 10 bar.
For a correct operation, the humidier must be supplied with food water coming from the aqueduct distribution network
as it is free of any element harmful to health and is compatible with the conductivity range necessary for the humidier to
function properly. Do not feed the humidier with well water or treated with osmosis or demineralising puriers or taken
from cooling circuits. Below is a summary table of the parameters necessary for the humidier to work properly.
INSTALLATION, MAINTENANCE AND USE MUST BE EXAMINED BY QUALIFIED TECHNICIANS IN
COMPLETE SAFETY.
IN CASE OF EXTERNAL INSTALLATION THE CABINET NEEDS AN ADDITIONAL EXTERNAL ENVELOPE
FOR THE PROTECTION FROM ADVERSE WEATHER CONDITIONS.
THE FOLLOWING PROCEDURES FOR THE INSTALLATION PHASE WILL BE LISTED BELOW. ALWAYS
CONSULT THE MANUFACTURER OF THE HUMIDIFIER, DELIVERED WITH THE UNIT, FOR A MORE
DETAILED GUIDE OF THE INSTALLATION AND MAINTENANCE PHASE.
WATER OPERATING RANGE LIMITS
PARAMETER U.M. MIN MAX
* Conductivity of water at 20° C µS/cm 250 1300
Hardness mg/l CaCO3 160 450
Chlorine mg/l Cl 0 0.2
Chloride ppm Cl 025
Calcium sulphate mg/l CaSO4 0 95
Metal impurities - solvents - soaps - lubricants mg/l 0 0
Temperature °C +1 +40
* The conductivity of the water is always expressed at 20 ° C, taking into account that the conductivity decreases with the decrease in water
temperature, it is possible in fact that in winter the mains water is particularly cold and therefore not conductive.

• 15 •Installation Manual • MAXIAIR MXP-HPW & HPWI-IOM/1905-E
9.6.3 Discharge connections
Connect the discharges from each condensate collection pan to the sewerage system either directly or via the manifold.
On each pan with discharge, t a drain trap of suitable height so as to prevent air entering into the system by depression,
and stopping the correct drainage of the water. A correct drain trap also prevents the inltration of bad smell.
The sizing and the construction of the drain trap must comply with the following formula: H >= P, where P, expressed in
mm w.c, is equal to the pressure gain of the unit installed.
The drain trap must be tted with a bleeding cap at the lowest point, and must be made so as to allow quick dismantling
for more complete cleaning.
The path of the condensate drain pipe must always slope down towards the outside.
Check that the condensate drain pipe does not stress the discharge tting on the unit.
The following image is a summary of the operating principle.
ELECTRODES
LEVEL SENSOR
WATER INLET VALVE
FILTER
DISCHARGE PUMP
DRAIN PAN LEVEL
RESIDUAL LIMESTONE
TREATMENT WATER
STEAM OUTLET
MAINS WATER INLET
EXCESS WATER
OUTLET

• 16 • Installation Manual • MAXIAIR MXP-HPW & HPWI-IOM/1905-E
10 - REFRIGERANT CIRCUIT
AP High pressure switch
ATC 5/16" access tting
BP Low pressure switch
CP Compressor
FFilter drier
PA 0-50 bar pressure probe
PB 0-30 bar pressure probe
RC Crankcase heater
RL Liquid receiver
SL Liquid sight glass
ST Temperature probe
VIC Inversion valve
VT Thermostatic expansion valve
VU Unidirectional valve
FRESH AIR
FAN
Pipe insulation

• 17 •
MXP - HEXA
Installation Manual • MAXIAIR MXP-HPW & HPWI-IOM/1905-E
11 - ELECTRIC CONNECTIONS
BEFORE STARTING ANY OPERATIONS, MAKE SURE THAT THE
MAIN POWER LINE IS DISCONNECTED.
CONNECT THE UNIT AND ALL ITS ACCESSORIES USING LESS WITH A SUITABLE CROSS-SECTION
FOR THE POWER RATINGS AND IN COMPLIANCE WITH THE LOCAL STANDARDS IN FORCE.
THE SIZE OF THE CABLES MUST IN ANY CASE GUARANTEE A VOLTAGE DROP WHEN STARTING OF
LESS THAN 3% OF THE RATED VALUE.
THE INSTALLER MUST ENSURE THAT A POWER DISCONNECTING SWITCH AND ANY OTHER DEVICES
THAT PROTECT THE ELECTRICAL PARTS ARE INSTALLED AS NEAR AS POSSIBLE TO THE UNIT.
CAUTION: WAIT 60 SECONDS BEFORE APPROACHING AND ENTERING THE VENTILATING SECTION,
SO AS TO ALLOW THE VENTILATING ASSEMBLY TO COME TO A COMPLETE STOP.
THE OVERALL WIRING DIAGRAM IS SUPPLIED WITH THE UNIT
• The electrical connections must be performed by specialist personnel.
• Check that the voltage and frequency shown on the unit’s rating plate match the mains power supply.
• All power lines shall be protected upstream by the installer
• Never use adapters, multiple sockets and/or extensions in the main power supply to the unit.
• Make connections according to the electrical wiring diagrams supplied with this unit and this handbook
• Use the cable holes close to the main switch in order to connect added options
• All the ventilating sections are tted with door lock safety microswitches; the connections to the micro-switch must be
made by the installer. The micro-switch disconnects power to the motor when opening the inspection door.
• Connect the unit to an effective earth wire.
Electric heater wiring diagram
Power line : provide a proper safety device equipped with differential magnetothermic switch
Dashed lines show the connections to be carried out by installer

• 18 • Installation Manual • MAXIAIR MXP-HPW & HPWI-IOM/1905-E
12 - CHECK BEFORE
ALL THE MEASUREMENTS MUST BE MADE WITH THE DOORS CLOSED. THE DOORS SHOULD ONLY
BE OPENED WHEN THE UNIT IS OFF.
Before starting, the air handling unit should undergo the following checks.
• Check that the discharges are properly connected, ensuring the correct draining of the condensate.
• Check the perfect operation of the damper mechanisms.
• Check that the pre-lters are correctly installed.
• Once realized the connection of the motor(s) of the fan(s), verify with accuracy that the contacts of the electrical clip
are suitable according to the power supply.
• Verify that all electrical components are correctly cabled such as micro switch on doors, lights, humidication pumps
and so on.
• Control the ground connection of the structure.
• Check the protection of the installation according to the actual norms.
• Check that any blocks of the dampers, fans, compressors, if present, have been removed.
• Check the sequence of the phases and the correct rotation cycle of the compressors.
• Check the sequence of the phases and the correct rotation cycle of the fans.
• Check the refrigerant gas level watching the liquid indicator.
• Check the oil level of the compressors watching the control light.
• Check the electrical absorption of each electrical component installed.
• Rotate by hand all the axles of the fans, to make sure they freely rotate.
• Clean the fans and all internal components of the unit from dirt, in casethey remained for long time exposed to
external agents.
• Check the blades of the fans, they don’t have to be damaged during transport operations.
• Check the seal of the panels and of the inspection doors.
• Unlock the supports of the compressors before the start-up.
• Unlock the supports of the fans (if present) before the start-up.
• Check if the connection used is correct, it has to be compliant to what indicated in the electrical diagrams and/or in the
electrical panel clips.
• Check that the syphons are realized for all drain pipes and they allow thecorrect emptying of the drain pans during
operating time.
• Check the air diffusion elements placed in the rooms, the correct opening of the regulation and re break shutters.
• Check if the aeraulic connection are correct.
• Check if the electrical connection of the auxiliary components are correct.
• Check the correct rotation sense of the fans. If it is not correct, reverse the electrical connection in the electrical panel.
• Check the power absorption of the fans.
• Check the correct operating of the regulating shutter.
• Power the compressors with the air handling unit turned off for at least 8 hours before the start-up of the refrigerant
section, in order to obtain the oil heating by mean of the internal electric resistance inside the compressor.
• Check the opening of the valves in the delivery or the aspiration of the compressor (if present).
• Start-up the unit according to the specics of the controller.
• Verify with a pressure gauge the pressions of work of Cooling circuit (standard check made by factory)
• Check the oil level from the proper control light.
• Once the unit has been activated check the correct exchange between freon/air and air/water (if present water coils)
by measuring the thermohygrometric conditions in the input of the coil and in the air ow.
• Check the position of the rotative enthalpic exchanger and check the belt tension. Lightly press all the seals of the
hentalpic rotative exchanger before the rst use.

• 19 •Installation Manual • MAXIAIR MXP-HPW & HPWI-IOM/1905-E
13 - BIOXIGEN®
Operating principle of Bioxigen®system
The Bioxigen® technology generates a ow of ionised air with a high concentration of negative oxygen ions. The oxygen
ions are produced using an oscillating electric eld that makes molecules in the air vibrate, increasing their kinetic energy
and as a result exchanging electrons when colliding, creating negative oxygen ions and positive ions (O2- and N2+).
That charged particles also act upon the molecules to eject electrons. Negative ions collide with airborne, particles such
as dust, pollen, bacteria, dander and smoke.
The negative ion transfers its charge to the polluting particle creating a new negatively charged particle, which continue to
attract positive particles until the particles become heavy enough to fall out of the air.
The ions are strongly attracted to the nearest “earthed” surface. As they drift, pollutants such as dust, pollen, cigarette smoke
and even vaporized substances are attracted to and cluster around the ions. This has the effect of making the ion grow in
size. There comes a point where it is too heavy to be carried in the air, so it falls to the ground. In this way it’s possible to
obtain a microbial reduction and a good indoor air quality without the need to include (but with the possibility) lters.
General guidelines
This product is based on the Bioxigen®technology and is recommended for use in forced air ventilation systems such as
air purication systems, air ducts, etc. The recommended air speed for all implementations is 3-6 m/s. When installing in
air ducts, it is essential you keep the appliance away from air turbulences, curves and taperings.
The appliance installation is extremely simple, both when set within air purication systems and when placed inside
discharge ducts.
The Bioxigen® system requires minimal maintenance, limited to periodical cleaning of the sterilizing tubes. Tube cleaning
should be performed with regular frequency according to the type of implementation – from once every 3 months to once
every 6 months. In the ‘Maintenance’ paragraph there are the operating instructions.
Power supply
The sanitizer module leaves the production plant completely cabled and it just needs the electrical power from network
and alarm contacts can be cabled or not. Electrical power has to be connected to the 3 poles socket of the module
supplied with the product and it is necessary to include a residual-current switch to isolate the electrical circuit as norms
require. Electrical socket xed on the box has a fuse. Before to realize connections make sure supply voltage complies
what indicated in the product label. If the product is powered, it lights up the green led and when the device is operating
it’s possible to hear a sizzle coming from condensers, it denotes they are operating.
In order to have a correct sanitization, the Bioxigen® module has to work only when fan is off (without forced ventilation)