Lennox DUCTAIR II User manual

Providing indoor climate comfort
DUCTAIR™ II
DUCTAIR II-IOM-0808-E
Installation, operating
and maintenance

DUCTAIR II - 0808-E • 1 •
INSTALLATION - OPERATION - MAINTENANCE
MANUAL
Ref : DUCTAIR II-IOM-0808-E
INSTALLATION
Installationinformation...............................................................2
Accessories .......................................................................2
Remotecontroller&itsframe.......................................................2
Cautiononremotecontrollerinstallation ..............................................2
Installationplace....................................................................3
Theindoorunit..................................................................3
Theoutdoorunit.................................................................3
Indoor unit installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Installthemainbody..............................................................4
Panelinstallation.................................................................7
Outdoorunitinstallation..............................................................8
COMMISSIONING
Installtheconnectingpipe...........................................................10
Expeltheair...................................................................11
Vacuumdryandleakagechecking..................................................12
Checktheleakage ..............................................................14
Connectthedrainpipe..............................................................14
Waterdrainage.................................................................14
Insulationwork.................................................................17
Wiring...........................................................................19
Theoutdoorunit...................................................................23
Testoperation.....................................................................23
SELF-DIAGNOSIS AND TROUBLESHOOTING
Indoorunit’sLEDindicationoftrouble..................................................24
LED’sfortheindicationofoutdoortrouble...............................................24
Clean ...........................................................................27
Troublesandsolutions..............................................................27
Troubles and solutions concerning the remote controller. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
Appendix 1: Indoor temperature and pipe temperature sensor resistance value table . . . . . . . . . . . . .29
Lennox have been providing environmental solutions since 1895, our range of DUCTAIRTM II continues to meet the standards
that have made LENNOX a household name. Flexible design solutions to meet YOUR needs and uncompromising attention
to detail. Engineered to last, simple to maintain and Quality that comes as standard. Information on local contacts at www.
lennoxeurope.com.
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 utilised (except in the operation of this product), reproduced,
issued to or made available to third parties without the prior written agreement of Lennox.
The specications and technical characteristics in this booklet are given for information purposes. The manufacturer reserves the right to modify them without
prior notice or obligation to modify in a similar manner, the equipments previously supplied.
CONTENTS

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• 2 • DUCTAIR II - 0808-E
INSTALLATION INFORMATION
To install properly, please read this manual at rst.
The air conditioner must be installed by qualied persons.
When installing the indoor unit or its tubing, please follow this manual as strictly as possible.
When all the installation work is nished, please turn on the power only after a thorough check.
No further announcement if there is any change of this manual caused by product improvement.
The appliance shall be installed in accordance with national wiring regulations.
The temperature of refrigerant circuit will be high, please keep the interconnection cable away from the copper tube.
Note: The installor should illustrate to users how to correctly use and maintain the air-conditioner, as well as remind users to
carefully read and keep both Installation Manual and Owner’s Manual well.
ACCESSORIES
Name of Accessories Q’ty Qutline Usage
Owner’s manual 1 - -
Installation manual 1 (This manual) -
Pipe insulating material 2 (Heat resisting)
Drain elbow 1 To connect drain
Seal 1 To connect drain
Signal receiver display board 1 Receive Signal
REMOTE CONTROLLER & ITS FRAME
1. Remote controller 1
2. Frame 1
3. Mounting screw (BST2.9x10-C-H) 2
4. Alkaline dry batteries (AM4) 2
5. Remote controller manual 1
CAUTION ON REMOTE CONTROLLER INSTALLATION
Never throw or beat the controller.
Before installation, operate the remote controller to determine its location in a reception range.
Keep the remote controller at least 1m apart from the nearest TV set or stereo equipment. (It is necessary to prevent image
disturbances or noise interferences.)
Do not install the remote controller in a place exposed to direct sunlight or close to a heating source, such as a stove.
Note that the positive and negative poles are in right positions when loading batteries.
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INSTALLATION
Remote
controller
Mouting screw BST2.9x10-C-H
Remote
controller
holder

DUCTAIR II - 0808-E • 3 •
INSTALLATION
INSTALLATION PLACE
THE INDOOR UNIT
There is enough room for installation and maintenance.
The ceiling is horizontal, and its structure can endure the weight of the indoor unit.
The air outlet and the air inlet are not impeded, and the inuence of external air is the least.
The air ow can reach throughout the room.
The appliance must be installed 2,3m above oor.
The connecting pipe and drainpipe could be extracted out easily.
There is no direct radiation from heaters.
THE OUTDOOR UNIT
There is enough room for installation and maintenance.
The air outlet and the air inlet are not impeded, and can not be reached by strong wind.
The place is dry and ventilative.
The support is at and horizontal and can stand the weight of the outdoor unit. And no additional noise or vibration.
Your neighborhood will not feel uncomfortable with the noise or expelled air.
There is no leakage of combustible gas.
It is easy to install the connecting pipe or cables.
CAUTION
Location in the following places may cause malfunction of the machine. (If unavoidable, please consult your local dealer.)
There exists petrolatum.
There is salty air surrounding(near the coast).
There is caustic gas(the sulde, for example) existing in the air (near a hot spring).
The Volt vibrates violently(in the factories).
In buses or cabinets.
In kitchen where it is full of oil gas.
There is strong electromagnetic wave existing.
There are inammable materials or gas.
There is acid or alkaline liquid evaporating.
The appliance shall not be installed in the laundry.
Other special conditions.
NOTES BEFORE INSTALLATION
Select the correct carry-in path.
Move this unit as originally packaged as possible.
If the air conditioner is installed on a metal part of the building, it must be electrically
insulated according to the relevant standards to electrical appliances.
NOTE - REMARK PER EMC DIRECTIVE 89/336/EEC
To prevent icker impressions during the start of the compressor (technical process), following installation conditions apply:
The power connection for the air conditioner has to be done at the main power distribution. The distribution has to be of a low
impedance, normally the required impedance reaches at a 32A fusing point.
No other equipment has to be connected with this power line.
For detailed installation acceptance, please refer to your contract with the power supplier if restrictions do apply for products like
washing machines, air conditioners or electrical ovens.
For power details of the air conditioner, refer to the rating plate of the product.
For any question contact your local dealer.
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• 4 • DUCTAIR II - 0808-E
INDOOR UNIT INSTALLATION
INSTALL THE MAIN BODY
Installing Ø10 hanging screw bolts. (4 bolts)
Please refer to the following gure for the distance measurement between the screw bolts.
Please install with f10 hanging screw bolts.
The handling to the ceiling varies from the constructions, consult the construction personnels for the specic procedures.
The size of the ceiling to be handled. Do keep the ceiling at. Consolidate the roof beam for possible vibration.
Cut off the roof beam.
Strengthen the place cut off, and consolidate the roof beam.
Carry out the pipe and line operation in the ceiling after nishing the installation of the main body. While choosing where to start
the operation, determine the direction of the pipes to be drawn out. Especially in case there is a ceiling, position the refrigerant
pipes, drain pipes, indoor & outdoor lines to the connection places before hanging up the machine.
The installation of hanging screw bolts.
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INSTALLATION
Wooden construction New concrete bricks
Put the square timber traversely over the roof beam, then
install the hanging screw bolts. (Refer to Chart 1)
Inlaying or embedding the screw bolts.(Refer to Chart 2)
Timber over the beam
Roof beam
Ceiling
Hanging screw bolts
Chart 1 Chart 2
Blade shape insertion Slide insertion
For original concrete bricks Steel roof beam structure
Use embedding screw bold, crock and stick harness. (Refer
to Chart 3)
Install and use directly the supporting angle steel. (Refer to
chart 4)
Steel bar
Embedding screw bolt
Chart 3 Chart 4
Hanging screw bolt
Supporting
angle steel
(Pipe hanging and embedding screw bolt)
Hanging bolts
Overhanging the indoor unit
Overhang the indoor unit onto the hanging screw bolts with
block.
Position the indoor unit in a at level by using the level
indicator, unless it may cause leakage.
1.
2.
Screw nut
Washer
Hanging
screw bolt
Overhang part
Chart 5

500 mm 1 0 0 m m 200mm
250mm
<3m
1000mm
500 mm
210
102
2 5
715
870
82
380220
175
210
63
55
915
870
268
385
>500mm
>250mm
>500mm
148
100
AÏ
BÏ
Φ100
DUCTAIR II - 0808-E • 5 •
INSTALLATION
Installing the dust proof net and canvas air passage
Install the dust proof net according to the installation manual;
Install the canvas air passage underneath the dust proof net.
Pipe connection
The static pressure in the outside of the unit is 39.2Pa (maximum 98Pa), the length of the air pipe attached is determined by this
parameter.
Size 12 installation location
Enough room for installation and maintenance.
1.
2.
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Air outlet
Refrigerant
pipes
Air return box
Air outlet
Air return box
Air return box
Duct
The ceiling is horizontal and it can afford the weight of the indoor unit.
The air inlet and outlet are not impeded and does not affected by outdoor air too much.
The air ow can reach every part of the room.
The connecting pipe and drainpipe can be easily extracted out.
There is no direct radiation from heat source.
Size 12 The position fo hanging bolts
Enough room for installation and maintenance.
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Air outlet (on side)
Air outlet sketch map
Refrigerant piping joint
(gas side)
Water outlet Ø25
Refrigerant piping joint
(gas side)
Fresh air inlet
Ceiling

250
320
A
P-250xL
II
127
A B C D E F G H I J K L M N P
18 1000 1050 1030 1050 1080 12,7 6,4 252 24,4 580 290 293,8 2 3 3
24 - 30 1000 1050 1030 1050 1080 15,9 9,5 252 24,4 580 290 293,8 2 3 3
30 - 60 1350 1400 1380 1400 1430 19,1 12,7 252 35 930 310 293,8 3 4 4
J=mxK
H
C
80
60
70
n-φ200
150
460-640
5
450
300
300
210
80
φ125
630
720
30
320
170
70
90
100
210
120
305
335
• 6 • DUCTAIR II - 0808-E
When using a back-air installation, please refer to the following:
Chart 8
Back panel layout
Model
Note:
The dimension of sizes 24 and 36 (3 phases) are the same
The dimension of sizes 30 and 36 (1 phase) are the same
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INSTALLATION
Size 18 to 60: The positioning of ceiling hole and indoor unit and hanging screw bolts
Air outlet
Hanging screw bolt
4-M10 site conguration
Main body: A
Distance between bolts: B
Ceiling hole: D
Panel: E
Chart 6
(Take size 36 as example)
Chart 7
Fixed screw
Main body: 800
Distance between holes: 565
Connecting point of
refrigerant pipes
(Gas side ØF)
Connecting point of
refrigerant pipes
(Liquid side ØG)
Connecting point of drain pipe
Entrances and exits for communication
lines of indoor and outdoor units
Ceiling hole: 470
Panel: 500
Plank (inside)
(for air delivery outside)
Dust proof net
(Additional purchase)
Canvas air passage
(Additional purchase)
Panel
(Additional purchase)

DUCTAIR II - 0808-E • 7 •
INSTALLATION
Outside frame
Chart 9
Buckle
Inside frame Knob Main body
Canvas air passage
Waist-shaped hole
xed board
Outside frame
Ceiling
Chart 10 Chart 11
Air passage
Outside
frame
Gallus
Hook
PANEL INSTALLATION
Unload inner frame: Slide the knob, release the buckle from the outside frame hole, then unload the inner frame (Chart 9)
Hang the outside frame on the main body with face down. (4 places at 4 corners): Hang the belt on the hook of the main body.
(Charts 10 & 11)
Note: The signal wire of the remote control receiver must be drawn out through the canvas air passage.
Fix the outside frame and the canvas air passage with screws: screw must be xed on from the bottom to the top (Chart 12)
Hang up the outside frame until it sticks to the ceiling tightly. (Chart 13)
Fix the main body and the outside frame with the x board of waist-shape hole (in two places) (Chart 14):
Hang one side of the x board of the waist-shaped hole on the hook of the main body.
Tighten the other side of the board with screw to the outside frame.
Cut off the surplus part of the board with pliers.
Bend the top of the broken end.
Note: when hanging up the outside frame with the x board of waist-shaped hole and the belt, stick the outside frame tightly to
the ceiling and x it.
Install the inner frame on the outside frame (the inverse sequence of unloading the inner frame) (Chart 14)
Note: Connect the remote control receiver with the indoor unit signal wires and x it.
Install remote controller.
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Chart 12 Chart 13
Screw
Canvas air passage
Ceiling
Main body
Canvas air passage
Outside frame
Ceiling
Chart 14 Chart 15
Hook
Waist-shaped hole
xed board
Outside frame
Bend
Outside frame
Air inlet
Inside frame
(Reverse side)

X
O
A
H
B
C
D
E
F
A B C D E F H
18 842 560 335 360 312 324 695
24 895 590 333 355 302 313 862
30 990 624 366 396 340 354 966
36 990 624 366 396 340 354 966
48 940 600 376 400 340 360 1245
60 940 600 376 400 340 360 1245
• 8 • DUCTAIR II - 0808-E
INSTALLATION
OUTDOOR UNIT INSTALLATION
SIDE AIR OUTLET OUTDOOR UNIT
CAUTION
Keep this unit away from direct radiation of the sun or other heaters. If unavoidable, please cover it with a shelter.
In places near coast or with a high attitude where the wind is strong, please install the outdoor unit against the wall
to ensure normal performance.
Use a bafe when necessary.
In the case of extremely strong wind, please prevent the air from owing
backwards into the outdoor unit. (Refer to chart 16)
Locate the outdoor unit as close to the indoor unit as possible.
The minimum distance between the outdoor unit and obstacles described
in the installation chart does not mean that the same is applicable to the
situation of an airtight. Leave open two of three directions A , B, C.
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Chart 16
Size of outdoor unit
Chart 18
Chart 17
Chart 19
Model