Lennox EMEA FLEXAIR 85 User manual

(5)
INSTALLATION, OPERATING
AND MAINTENANCE
AIR COOLED ROOFTOP PACKAGED UNITS
FLEXAIR
85-220kW
FLEXAIR-IOM-2002-E

FLEXAIR-IOM-2002-E
INSTALLATION
OPERATION
MAINTENANCE MANUAL
Ref: FLEXAIR-IOM-2002-E
INTRODUCTION................................................................................................................................................................... 1
GENERAL DESCRIPTION...........................................................................................................................................................1
SAFETY CODES &REGULATIONS..............................................................................................................................................1
MACHINE DESIGNATION .........................................................................................................................................................1
EMC DIRECTIVECOMPLIANCE .................................................................................................................................................2
F-GAS REGULATION.................................................................................................................................................................2
WARRANTY..............................................................................................................................................................................2
NOTES FOR UNITFITTED WITH GAS BURNER...........................................................................................................................3
SAFETY ....................................................................................................................................................................................4
SAFETYDEFINITION .................................................................................................................................................................5
LABELS.....................................................................................................................................................................................6
PED DIRECTIVE ........................................................................................................................................................................7
MAIN SAFETY RECOMMENDATIONS .......................................................................................................................................8
DELIVERY CHECKS..................................................................................................................................................................10
RATINGPLATE........................................................................................................................................................................10
STORAGE...............................................................................................................................................................................10
OPERATING LIMITS................................................................................................................................................................11
MAINTENANCE KEY...............................................................................................................................................................11
CONDENSATEDRAINS............................................................................................................................................................11
MANDATORYHANDLING DEVICES .........................................................................................................................................12
DIMENSIONSAND WEIGHTS..................................................................................................................................................13
LIFTINGTHE UNIT ..................................................................................................................................................................14
INSTALLATION .................................................................................................................................................................. 15
FORKLIFT PROTECTIONS........................................................................................................................................................15
PRELIMINARYCHECKS ...........................................................................................................................................................15
INSTALLATIONREQUIREMENTS.............................................................................................................................................15
CONNECTIONS ......................................................................................................................................................................16
MINIMUM CLEARANCEAROUND THE UNIT ..........................................................................................................................16
RECOMMENDATIONSFOR DUCTS CONNECTIONS.................................................................................................................17
PACKING LONG DISTANCE (OPTION).....................................................................................................................................18
CUSTUMER WIRING ..............................................................................................................................................................19
INSTALLATION ON A ROOFCURB....................................................................................................................................... 23
CURBINGAND FLASHING.......................................................................................................................................................24
NONADJUSTABLE NONASSEMBLED ROOFCURB INSTALLATION ...........................................................................................25
TRANSITIONCURB.................................................................................................................................................................26
FOAMINSULATION INSTALLING.............................................................................................................................................26
FOAM GASKET INSTALLING....................................................................................................................................................26
ENERGY RECOVERY INSTALLATION ................................................................................................................................... 27
WATER CONDENSING ....................................................................................................................................................... 35
SENSOR MOUNTING ......................................................................................................................................................... 41

FLEXAIR-IOM-2002-E
CO2 OR ADVANCED ENTHALPIC CONTROL PACK SENSOR.....................................................................................................41
ECONOMISER AND EXTRACTION....................................................................................................................................... 42
COMMISSIONING.............................................................................................................................................................. 43
CASING CONDENSATION RISK...............................................................................................................................................43
BEFORE TURNING ON THE POWER........................................................................................................................................43
POWERING THE UNIT............................................................................................................................................................44
CLIMATIC™ CONFIGURATION................................................................................................................................................45
FILTERS ............................................................................................................................................................................. 47
FILTER REPLACEMENT...........................................................................................................................................................47
FRESH AIR WOOD ............................................................................................................................................................. 48
INSTALLING ...........................................................................................................................................................................48
WIND DIRECTION ..................................................................................................................................................................48
REFRIGERANT CIRCUIT ...................................................................................................................................................... 49
GENERIC REFRIGERANT SKETCH............................................................................................................................................49
PREHEATING OF THE CRANKCASE HEATERS..........................................................................................................................51
ELECTRONIC EXPANSION VALVE ............................................................................................................................................51
HEATING OPTION.............................................................................................................................................................. 52
HOT WATER COIL...................................................................................................................................................................52
ELECTRIC HEATERS ................................................................................................................................................................54
GAS BURNER .........................................................................................................................................................................55
MAINTENANCE DIAGNOSTIC............................................................................................................................................. 64
MAINTENANCE PLAN ........................................................................................................................................................ 68
WARRANTY....................................................................................................................................................................... 72
TERMS AND CONDITIONS......................................................................................................................................................72
LIFETIME OF THE EQUIPMENT...............................................................................................................................................72
DISPOSAL OF THE EQUIPMENT..............................................................................................................................................72
Original version is the English one.
Other versions are translations.

INTRODUCTION
FLEXAIR-IOM-2002-E 1
INTRODUCTION
All the technical and technological information contained in this manual, including any drawing and technical descriptions
provided by us, remain the property of LENNOX and must not be used (except in operation of this product), reproduced, issued
to or made available to third parties without the prior written agreement of LENNOX.
GENERAL DESCRIPTION
The FLEXAIR range of units is a roof cooling monoblock solution for the climatic comfort of premises.
SAFETY CODES & REGULATIONS
The unit is designed for outdoor installation only. The unit must be installed in accordance with local safety codes and
regulations and can only be used in well ventilated area.
Inspections and requalification according pressure equipment directive must follow the local regulations where the unit is
installed. Commissioning, monitoring, periodic verification and requalification obligations may be made mandatory in some
countries. Please refer to it when installing the equipment.
You must read and be familiar with this operating manual prior to commission the unit. Please closely follow the instructions.
We would like to stress the importance of training with respect to the correct handling of the unit.
Please consult LENNOX on the options available in this field.
It is important that this manual is stored in a permanent location in the vicinity of the unit
MACHINE DESIGNATION
FA
FLEXAIR
M
400V/3/50
1
Revision number
C
Cooling only unit
H
Heat pump unit
G
Cooling only unit with gas
fired heating
M
Heat pump unit with gas
fired heating
M
R410A
Model designation
F-BOX
G-BOX
H-BOX
085
100
120
150
170
200
230
M
High heat
S
Standard heat
N
No heat
S
1 circuit
D
2 circuits
F A C 1 0 0 D N M 1 M

INTRODUCTION
FLEXAIR-IOM-2002-E 2
EMC DIRECTIVE COMPLIANCE
WARNING:
This equipment is a “B class”according EMC Directive. In an industrial environment, this device can create radio electrical
noise. In this case, the owner can be asked to take appropriated actions.
The units meet the following hardest environments standards:
•EN 61000-6-3: program for environment residential, commercial and light industry.
•EN 61000-6-2: immunity for industrial environments
This applies to all machine installed with nominal amps below <75A:
•The short-circuit rate Rsce=33 is defined in the EN61000-3-12 standard relative to the harmonics readings on
the supply network. The appliances compliant with the harmonic current limits equivalent to Rsce=33 can be
connected in whatever connection point of the main supply system.
•The maximal allowable impedance of the main supply system Zmax=0.143Ω is defined by EN 61000-3-11
standard relative to the voltage variation, fluctuation and flicker readings. The connection to the supply is a
conditional connection submitted to the preliminary agreement of the power supply local provider.
The differences between the various machines are only related to the power of the compressors and equipment that are
associated. For conducted and radiated emission and immunity, these differences do not alter the results.
F-GAS REGULATION
PLEASE READ THE SAFETY DATA SHEET OF THE REFRIGERANT BEFORE ANY INTERVENTION OR INSTALLATION OF THE MACHINE.
Operators of refrigeration equipment’s must comply with the obligations defined in:
•Regulation on Fluorinated greenhouse gases (F Gas)
•Regulation on substances that deplete the ozone layer
Non-compliance with these requirements is an offence and liable of financial penalties.
Moreover, in case of problem it is mandatory to prove to the insurance company that the equipment complies with the F
gas Regulation.
WARRANTY
VEUILLEZ LIRE LA FICHE SECURITE DU REFRIGERANT AVANT TOUTES INTERVENTION OU INSTALLATION DE LA MACHINE.
The warranty of the unit is subject to the warranty definitions as agreed upon in the order. It is expected that the design
and installation of the unit utilizes good working practices. The warranty will be legally null and void if:
•Service and maintenance have not been executed in accordance with the regulations; repairs have not been
carried out by LENNOX personnel or have been implemented without prior written permission by LENNOX.
•Modifications have been made to the equipment without prior written permission by LENNOX.
•Settings and protections have been modified without prior written permission by LENNOX.
•Non-original or other than the prescribed refrigerants or lubricants are used.
•The equipment has not been installed and/or connected in accordance with the installation instructions.
•The equipmentis being used improperly, incorrectly,negligentlyor not in accordancewith its nature and/or purpose.
•A flow protection device is not fitted.
•The unit maintenance booklet is not complete or not available.
In these circumstances LENNOX is indemnified from any product liability claims from third parties.
In the event of a warranty claim the machine serial number and LENNOX order number must be quoted.

INTRODUCTION
FLEXAIR-IOM-2002-E 3
NOTES FOR UNIT FITTED WITH GAS BURNER
THE UNIT MUST BE INSTALLED IN ACCORDANCE WITH LOCAL SAFETY CODES AND REGULATIONS AND CAN ONLY BE USED
IN WELL VENTILATED AREA.
IF MACHINE IS INCLUDING GAS BURNER, MINIMUM CLEARANCE AROUND THE UNIT MUST BE AT LEAST 8 M TO ALLOW A
PROPER GAS FLUE DILUTION. IF NOT POSSIBLE, THE FRESH AIR INTAKE MUST BE DUCTED AT LEAST 8 M AWAY FROM THE
GAS BURNER EXHAUST.
PLEASE READ CAREFULLY THE MANUFACTURER’S INSTRUCTIONS BEFORE STARTING THIS UNIT
Switchgear must be installed on each unit in accordance with the Machine Directive and the standard
EN 60204.
THIS MANUAL IS ONLY VALID FOR UNITS DISPLAYING THE FOLLOWING CODES:
GB IR GR DA NO FI IS
In case these symbols are not displayed on the unit, please refer to the technical documentation which will eventually
detail any modifications required to the installation of the unit in a particular country

INTRODUCTION
FLEXAIR-IOM-2002-E 4
SAFETY
The safety information contained in this manual is provided as a guide for the safe handling of this installation. LENNOX
does not vouch for the completeness of this information and can therefore not accept liability for any possible omissions. In
the roof tops, heat is being transported by a pressurized refrigerant, with changes in pressure and temperature. For air cooled
roof tops, fans have been provided to discharge heat into the environment. The protection of operating and maintenance
personnel was central in the design of the roof top. Safety features have been included to prevent excessive pressure in the
system. Sheet metal parts have been fitted to prevent inadvertent contact with (hot) pipes. For air cooled roof tops, the fans
are equipped with protective grids and the electrical control panel is completely touch-proof. This excludes some parts
operating at a safe voltage (< 24 Volt). The service panels can only be opened using tools.
The electrical control panel is completely touch-proof. This excludes some parts operating at a safe voltage (< 50 Volt). The
service panels can only be opened using tools.
Notwithstanding that the units are equipped with extensive safety and protection features, the utmost care and attention
is needed when carrying out operations on the machine. Furthermore, ear protection should be worn when working on or
in the vicinity of the roof tops. Operations on the cooling circuit or electrical equipment should be carried out by authorized
personnel.
It is essential to follow non exhaustive recommendations hereunder:
•Never work on a unit that is still energized. Wait 15 minutes before working on the machine after a power outage
(discharge of the capacitors).
•Any manipulation (opening or closing) of a shut-off valve must be carried out by a qualified and authorized engineer.
These procedures must be carried out with the unit shut-down.
•Never work on any of the electrical components, until the general power supply to the unit has been cut. During any
maintenance operations on the unit, lock the power supply circuit in the open position ahead of the machine. If the work
is interrupted, check the lock before resuming the work.
•WARNING: Even if the unit has been switched off, the power circuit remains energized, unless the unit or circuit
disconnect switch is open. Refer to the wiring diagram for further details.
•In case of maintenance operations on fans (grills replacement …) ensure that the power is shut off to avoid automatic
restart.
•Before the opening of the refrigerant circuit, check the pressure with manometers or pressure sensors, and purge the
circuit.
•Never leave a unit stopped with valves closed on the liquid line, refrigerant could be trapped and the pressure would rise.
•All installation parts must be maintained by the personnel in charge, in order to avoid material deterioration and injuries
to people. Faults and leaks must be repaired immediately. The authorized technician must have the responsibility to repair
the fault immediately. Each time repairs have been carried out to the unit, the operation of the safety devices must be
re-checked.
•Follow guidance and recommendations given in safety and machine standards such as EN378, ISO5149, etc.
•Do not use oxygen to purge lines or to pressurize a machine for any purpose. Oxygen gas reacts violently with oil, grease,
and other common substances.
•Never exceed the specified maximum operating pressures.
•Verify the allowable maximum high- and low-side test pressures by checking the instructions in this manual and the
pressures given on the unit name plate.
•Do not use air for leak testing. Use only nidron or dry nitrogen.
•Do not unweld or flame cut the refrigerant lines or any refrigerant circuit component until all refrigerant (liquid and vapor)
has been removed from roof top. Traces of vapor should be displaced with dry air nitrogen. Refrigerant in contact with
an open flame produces toxic gases.
•Do not siphon refrigerant
•Avoid spilling liquid refrigerant on skin or splashing it into the eyes. Use safety goggles. Wash any spills from the skin with
soap and water. If liquid refrigerant enters the eyes, immediately and abundantly flush the eyes with water and consult
a doctor

INTRODUCTION
FLEXAIR-IOM-2002-E 5
SAFETYDEFINITION
The rooftops meet the following safety definitions, and is provided with CE markings if applicable (for further information see
EU declaration).
•EN-378-2016
•2006/42/EC “Machine Directive”
(Directive 2014/35/EU relating to low voltages taken
into account in the machine directive according to Annex
1 §1.5.1)
•EN-60204-1
•2014/30/EU “EMC Directive”
•Pressure Equipment Directive 2014/68/EU
•EU 517/2014 F-Gas
•2009/125/EC Ecodesign
oEU 2016/2281 Rooftop
-Gas Equipment Regulation EU 2016/426
-2011/65/EU RoHS Directive
-2012/19/EU WEEE
-EC 1005/2009

INTRODUCTION
FLEXAIR-IOM-2002-E 6
LABELS
The rooftop may be marked with the following warning labels to alert to potential hazards (on or near the potentially hazardous
part). The rooftop may include the following labels
High temperatures
Electrical Voltage
Rotating parts
Sharp parts
A2L: slightly flammable
Wear of PPE (Personal
protective equipment)
Warning
Inflammable dusty filters
Don’t walk
Don’t strap
Warning main switch supplied
from bottom
EUROVENT certification
Gravity center
Protection by water filter
mandatory
Protection by strainer filter
mandatory
Transport of non-flammable
liquefied gas
Transport of flammable
liquefied gas
OK to send document
Information to read
Electrical connections can loosen during transport.
Please check them before start-up.
CMIM marking (Morocco)
CE marking
CA marking (UK)
Regularly check that the warning labels are still in the correct positions on the machine and replace them if necessary.

INTRODUCTION
FLEXAIR-IOM-2002-E 7
PED DIRECTIVE
All units are compliant with the PED directive.
Warning:
1. Attention: The high-pressure safety switches are essential elements which guarantee the system remains within the
admissible operating limits. Before switching on the installation, always ensure all electrical connections are correct on
these elements which are used to isolate the electrical power supply to the compressor(s) they protect. Carry out a test
to ensure the electrical power supply is effectively isolated when the pressure switch attains its set value.
2. In case of installation in a seismic zone or in a zone which may be effected by violent natural occurrences such as storms,
tornados, floods, tidal waves, etc.…, the installer and/or operator will refer to valid standards and regulations in order
to ensure the devices required are available as our units are not designed to operate under such conditions without
prior precautions.
3. The equipment is not designed to resist fire. The installation site will therefore have to respect valid standards with
regard to protection against fire (emergency instructions, map…).
4. In case of exposure to corrosive external atmospheres or products, the installer and/or operator shall take the necessary
precautions to avoid damage to the equipment and will make sure the equipment provided has the necessary and
sufficient anti-corrosion protection.
5. To respect a sufficient number of supports for the piping according to their size and weight under operating conditions
and to design the piping to avoid a water hammer phenomenon
6. For technical reasons, it is not possible to carry out hydrostatic tests on all our units so leak tests are carried out as a
compensatory measure. (The entire circuit is checked using leak detectors). For machines charged with refrigerant, at
the end of the test, an HP test is carried out in the factory to make sure the pressure switch is working properly.
7. Before any work is carried out on the refrigeration circuit, the dry air or nitrogen pressure our units are supplied with
must be released (For units not charged with refrigerant in the factory.)
8. The emissions of refrigerant via the safety relief valves must be channeled to the exterior of the machine room. The
outlet relief valve will have to be sized in compliance with EN13136.
9. Installation and maintenance of these machines must be carried out by personnel qualified to work on refrigeration
equipment.
10. All interventions must be carried out in conformity with valid safety regulations (e. g.: EN 378), as well as the
recommendations indicated on the labels and handbooks provided with the machine. All actions shall be taken to avoid
access of unauthorized persons.
11. It is essential that any pipework or other components of the refrigeration circuit hazardous to people because of their
surface temperature are insulated or identified.
12. Ensure that the installation zone (room or area) of the machine has restricted access and ensure the good condition of
the covering.
!

INTRODUCTION
FLEXAIR-IOM-2002-E 8
MAIN SAFETY RECOMMENDATIONS
All work on the unit must be carried out by a qualified and authorized employee.
Non-compliance with the following instructions may result in injury or serious accidents.
WORK ON THE UNIT:
The risk analyses of our machines are carried out taking into account operation in a standard environment with unpolluted air.
For any specific application (kitchen, industry ...) please contact your local sales representative.
•The unit shall be isolated from the electrical supply by disconnection and locking using the main isolating switch.
•Workers shall wear the appropriate personal protective equipment (helmet, gloves, glasses, etc.).
WORK ON THE ELECTRICAL SYSTEM:
•Work on electric components shall be performed with the power off by employees having valid electrical qualification and
authorization.
WORK ON THE REFRIGERATING CIRCUIT(S):
•Monitoring of the pressures, draining and filling of the system under pressure shall be carried out using connections provided
for this purpose and suitable equipment.
•To prevent the risk of explosion due to spraying of coolant and oil, the relevant circuit shall be drained and at zero pressure
before any disassembly or unbrazing of the refrigerating parts takes place.
•There is a residual risk of pressure build-up by degassing the oil or by heating the exchangers after the circuit has been
drained. Zero pressure shall be maintained by venting the drain connection to the atmosphere on the low pressure side.
•The brazing shall be carried out by a qualified brazier. The brazing shall comply with standard EN1044 AG107 (minimum
30% silver).
REPLACING COMPONENTS:
•Replacement of components shall be carried out using spare parts, or using parts approved by Lennox.
•Only the refrigerant shown on the manufacturer’s nameplate shall be used.
PARAMETERING AND CONTROL:
•For any intervention related to component parameterization, controls and unit operation management, refer to Climatic
Roof-Top and Unitary IOM.
FILTERS:
•Do the filters fire classification’s choice according to local regulations

INTRODUCTION
FLEXAIR-IOM-2002-E 9
TRANSPORT –HANDLING
•Never lift the unit without forklift protections
•Remove the forklift protection before installation
•An approach ramp must be installed if the unit’s installation requirements tell that it's necessary to reach the main switch.
This recommendation is valid for installations in general and in particular for return and curbs. It’s also valid toreach other parts
of the unit: filters, refrigerant circuit, etc…
•It’s advised to fix curbs and roofcurbs to the unit
•Installation of the unit and accessibility must be compliant with the local regulations. Ensure that all access equipment allow
maintenance operation in safety (electrical cabinet, main switch, panels, filter, refrigerant circuit…)
•It is strictly forbidden to walk or store equipment or material on top of the rooftop unit
•Equipment designed to withstand transport and handling according to the established protocol (for the handling protocol,
please refer to the installation instructions for the relevant product range).
•All unloading operations must be carried out with suitable equipment (crane, forklift truck, etc.).
•When using a forklift truck, you must respect the positions and the direction of handling indicated on the products.
•The equipment must be handled with care to avoid damage to the bodywork, pipework, condenser, etc.
ROOFTOP INSTALLATION IN HEAVY WIND LOCATIONS
•The roofcurbs (vertical & horizontal) and rooftops installations are designed to withstand winds up to 80 km/h. Above this
limit, it’s recommended to take appropriate actions to secure the installation.
•Ensure the fresh air inlet does not face prevailing wind direction.
COMMISSIONING:
•It must only be carried out by trained refrigeration engineers.
•Don’t forget to open the insulation valve on the liquid line before starting the unit
FAN COMPARTEMENT:
•Stop the power before accessing the fan compartment.
Warning: the unit is working under pressure. Never open the panels when the unit is working. Even after shutting down the
unit, wait for 2 minutes until the fans are completely stopped before opening any panel.
GAS:
•Any work on gas module must be carried out by qualified personnel
•A unit with gas module must be installed in accordance with local safety codes and regulations and can only be used in
planed installation conditions for outdoor.
•Before commissioning this type of unit, it’s mandatory to ensure that the gas distribution system is compatible with the
adjustment and settings of the unit.
WARNING:
•The units are not designed to resist to a fire. The installation site must comply with the standards relating to fire protection.
•In case of installation of the units in an area recognized as being potentially at risk for natural phenomena (tornado,
earthquake, tidal wave, lightning...), please follow the standards and regulations, and provide the necessary devices to
prevent from these risks.
•In the event of fire, refrigerating circuits can cause an explosion and spray coolant gas and oil.

INTRODUCTION
FLEXAIR-IOM-2002-E 10
DELIVERY CHECKS
On receipt of a new equipment please check the following points. It is the customer’s responsibility to ensure that the products
are in good working order:
•The exterior has not been damaged in any way.
•The lifting and handling equipment are suitable for the equipment and comply with the specifications of the handling
instructions enclosed here-in.
•Accessories ordered for on-site installation have been delivered and are in good working order.
•The equipment supplied corresponds to the order and matches the delivery note.
If the product is damaged, exact details must be confirmed in writing by registered post to the shipping company within 48
hours of delivery (working days). A copy of the letter must be addressed to Lennox and the supplier or distributor for
information purposes. Failure to comply will invalidate any claim against the shipping company.
RATING PLATE
The rating plate provides a complete reference for the model and
ensures that the unit corresponds to the model ordered. It states the
electrical power consumption of the unit on start-up, its rated power
and its supply voltage. The supply voltage must not deviate beyond:
+5/-5%. The start-up power is the maximum value likely to be achieved
for the specified operational voltage. The customer must have a
suitable electrical supply. It is therefore important to check whether
the supply voltage stated on the unit's rating plate is compatible with
that of the mains electrical supply. The rating plate also states:
•year of manufacture
•weight of the unit
•type of refrigerant used + GWP*
(*Global warming potential)
•required charge for each circuit
•operating Pressure min/max
•operating Temperature min/max
CE marking: 5 possible cases
- CE -CE0038
- CE1312 -CE0038 + CE1312
- Absence of CE marking (outside the EC only)
STORAGE
When units are delivered on site they are not always required immediately and are sometimes put into storage. In the event
of medium to long-term storage, we recommend the following procedures:
•Ensure that there is no water in the hydraulic systems.
•Keep the heat exchanger protection if any.
•Keep protective plastic film in position.
•Ensure the electrical panels are closed.
•Keep all items and options supplied in a dry and clean place for future assembly before using the equipment.
•Store the unit on an appropriate place (flat surface).
•Storage temperature must be respected according to the information given on the rating plate
It is strongly recommended to store units is a dry, sheltered place (in particular for units that will be installed indoor).
This product is used for Air Conditioning. Contains fluorinated
greenhouse gases covered by the Kyoto protocol. Hermetically sealed.

INTRODUCTION
FLEXAIR-IOM-2002-E 11
OPERATING LIMITS
MAINTENANCE KEY
On delivery we recommend that you keep the key which is attached to an eyebolt in a safe
and accessible place. This allows you to open the panels for maintenance and installation
work.
The locks are ¼ turn + then tighter.
CONDENSATE DRAINS
The condensate drains are not assembled when delivered and are stored in the
electrical panel with their clamping collars.
To assemble them, insert them on the condensate tray outlets.
The drains must be installed in vertical position.
Heating mode
Outdoor air temperature
°C
Coil indoor inlet
temperature
°C
Coil indoor inlet
temperature
°C
Outdoor air temperature
°C
Cooling mode

INTRODUCTION
FLEXAIR-IOM-2002-E 12
MANDATORY HANDLING DEVICES
Vacuum lifting beam to position the unit
Handling slings to guide the unit towards the roofcur
b
COMPLIANT
NON COMPLIANT

INTRODUCTION
FLEXAIR-IOM-2002-E 13
DIMENSIONSAND WEIGHTS
FLEXAIR (Air cooled)
85
100
120
150
170
200
230
View (F, G, H box)
F BOX
F BOX
F BOX
G BOX
G BOX
H BOX
H BOX
A
mm
2245
2245
2245
2243
2243
2259
2259
B
mm
3314
3314
3314
4360
4360
5171
5171
C
mm
1750
1750
1750
1885
1885
2232
2232
D
mm
485
485
485
522
522
687
687
Weight of basic units without any options. All weights are given in kg (+/- 5%).
Individual weight of a given rooftop is indicated on the rating plate and on the sale’s offer.
For each product to be lifted, check in advance the compatibility between the load and the capacity of the handling equipment.
Basic unit
FAC
1081
1087
1164
1510
1551
2120
2143
Basic unit
FAG gas module H
1243
1249
1326
1724
1764
2388
2411
Basic unit
FAH
1086
1092
1169
1526
1570
2057
2173
Basic unit
FAM gas module H
1248
1254
1331
1740
1784
2327
2441
Heat recovery wheel module
HRMO
525
525
525
635
635
730
730
Roofcurb
Return roofcurb Downflow EC
684
684
684
804
804
804
804

INTRODUCTION
FLEXAIR-IOM-2002-E 14
LIFTING THE UNIT
As shown on the picture below, a lifting frame is necessary
After lifting, withdraw angle’s feet and lifting lugs.
Do not install the unit on the refrigeration side on roofcurb.

INSTALLATION
FLEXAIR-IOM-2002-E 15
INSTALLATION
FORKLIFT PROTECTIONS
WARNING: NEVER LIFT THE UNIT WITHOUT FORKLIFT PROTECTIONS
REMOVE THE FORKLIFT PROTECTIONS BEFORE INSTALLATION
PRELIMINARY CHECKS
Before installing the equipment, the following points MUST be checked:
•Have the forklift protections been removed?
•Is there sufficient space for the equipment?
•Is the surface on which the equipment is to be installed sufficiently solid to withstand its weight? A detailed study of the
frame must be made beforehand.
•Do the supply and return ductwork openings excessively weaken the structure?
•Are there any obstructing items which could hinder the operation of the equipment?
•Does the electrical power available correspond to the equipment's electrical specifications?
•Is drainage provided for the condensate?
•Is there sufficient access for maintenance?
•Installation of the equipment could require different lifting methods which may vary with each installation (helicopter or
crane). Have these been evaluated?
•Ensure that the unit is installed in accordance with the installation instructions and local applicable codes.
•Check to ensure that the refrigerant lines do not rub against the cabinet or against other refrigerant lines.
In general, make sure no obstacles (walls, trees or roof ledges) are obstructing the duct connections or hindering assembly and
maintenance access
INSTALLATION REQUIREMENTS
The surface on which the equipment is to be installed must be clean and free of any obstacles which could hinder the flow of
air to the condensers:
•Avoid installing two units side by side or close to each other as this may restrict the airflow to the condensers.
•Uneven surfaces are prohibited. The surface must be flat and respect a maximal flatness of 0.5mm per linear meter (in both
directions length and width).
•The entire surface of the chassis must rest on a support (except for the Lennox PIED option provided for this purpose).
•For the installation of a machine without the roofcurb or box supplied by Lennox, it is imperative that the load of the
machine is evenly distributed under the entire frame.
Before installing a packaged Rooftop unit it is important to understand:
•The direction of prevailing winds
•The direction and position of air flows.
•The external dimensions of the unit and the dimensions of the supply and return air connections.
•The arrangement of the doors and the space required to open them to
access the various components

INSTALLATION
FLEXAIR-IOM-2002-E 16
CONNECTIONS
•Ensure that all the pipe-work crossing walls or roofs are secured, sealed and insulated.
•To avoid condensation problems, make sure that all pipes are insulated according to the temperatures of fluids and type of
crossed premises.
NOTE: The protection sheets fitted to the finned surfaces must be removed prior to start up
The customer must provide the necessary equipment in his installation to protect the power line that feeds our unit. A
differential of 300mA is recommended.
If the unit is equipped with variable condenser fans or variable speed pumps or compressor, a type B differential is
recommended.
MINIMUM CLEARANCE AROUND THE UNIT
Figure below shows the required clearances and service access around the unit.
NOTE: Ensure the fresh air inlet does not face prevailing wind direction
•Make sure that the fresh air duct is not in the same direction as the prevailing winds.
•If machine is including gas burner, minimum clearance around the unit must be at least 8 m to allow a proper gas flue
dilution. If not possible, the fresh air intake must be ducted at least 8 m away from the gas burner exhaust.
•In case of extraction option, it is recommended to duct fresh air intake.
•An approach ramp must be installed if the unit’s installation requirements tell that it's necessary to reach the main switch,
the electrical cabinet, the compressor and the ventilation compartment. This recommendation is valid for all type of
installations.
•It is also important to respect a minimal clearance of 3 meters above of the unit, to allow a good operation of the outdoor
fans.
A
B
C
D
E
FAC/FAH/FAG/FAM
(mm)
F BOX
2600 (1)
1000
1000
1000
3000
G BOX
2600 (1)
1000
1000
1000
3000
H BOX
2600 (1)
1000
1000
1000
3000
(1) Add 1000 mm if the units are equipped with gas burner