Lennox COMFORT User manual

Providing indoor climate comfort
COMFORT - Sizes 12-48
COMFORT-IOM-0106-E
Installation manual

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CONTENT
1. PRECAUTIONS .........................................................................................2
2. INSTALLATION INFORMATION ............................................................... 3
3. ATTACHED FITTINGS............................................................................... 4
4. INSTALLATION PLACE ............................................................................5
5. INDOOR UNIT INSTALLATION.................................................................6
6. OUTDOOR UNIT INSTALLATION...........................................................12
7. INSTALL THE CONNECTING PIPE ........................................................13
8. CONNECT THE DRAIN PIPE ..................................................................16
9. INSTALLATION OF FLANGE AND DUCT..............................................17
10. WIRING ..................................................................................................19
11. TEST OPERATION ................................................................................27

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1. PRECAUTIONS
SAFETY CONSIDERATIONS
Installation and servicing of air conditioning equipment can be hazardous due to system pressure and
electric components. Only trained and qualified service personnel should install, repair or service air
conditioning equipment.
All other operations should be performed by trained service personnel. When working on air
conditioning equipment, observe precautions in the literature, tags and labels attached to the unit and
other safety precautions that may apply. Follow all safety codes. Wear glasses and work gloves. Use
quenching cloth for brazing and unbrazing operations. There are fire extinguishers available for all
brazing operations.
WARNING
This manual describes the installation of specified indoor and outdoor units. Do not install them
connected with any other indoor or outdoor unit .Mismatching of units and incompatibility between
control devices in the two units could lead to damage of both units .
WARNING
Before performing service or maintenance operations on system, turn off main power switch of the unit.
Electrical shock could cause personal injury.
This unit shall be installed in accordance with national wiring regulations.
WARNING
If the supply cord is damaged, it must be replaced by the manufacturer or its service agent or similarly
qualified person in order to avoid a hazard.
The means for disconnection from the supply having a contact separation of at least 3 mm in all poles.
CAUTION
1. Wire the outdoor unit, then wire the indoor unit. You are not allow to connect the air conditioner with
the power source until wiring and piping the air conditioner is done.
2. For installation of the indoor unit, outdoor unit, and connection piping in between, follow the
instructions given in this manual as strictly as possible.
3. Installation in the following places may cause trouble. If it is unavoidable using in such places,
please consult with the dealer.
(1) A place full of machine oil.
(2) A saline place such as coast.
(3) Hot-spring resort.
(4) A place full of sulfide gas.
(5) A place where there are high frequency machines such as wireless installation, welding
machine, medical facilities.
(6) A place of special environmental conditions.
4. Don't install this unit in the laundry.

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NOTE
Remark per EMC Directive 89/336/EEC
For to prevent flicker impressions during the start of the compressor (technical process), following
installation conditions do apply.
1. 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 32 A fusing
point.
2. No other equipment has to be connected with this power line.
3. 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.
4. For power details of the air conditioner refer to the rating plate of the product.
5. For any question contact your local dealer.
2. INSTALLATION INFORMATION
•To install properly, please read this "installation manual" at first.
•The air conditioner must be installed by qualified persons.
•When installing the indoor unit or its tubing, please follow this manual as strictly as possible.
•When all the installation work is finished, please turn on the power only after a thorough check.
•Regret for no further announcement if there is any change of this manual caused by product
improvement.
CAUTIONS FOR THE REMOTE CONTROLLER OPERATION
•Please do not throw the remote controller or beat it.
•Please use the remote controller within the allowed distance, and keep the transmitter toward the
receiver of the indoor unit.
•Please keep the remote controller more than 1m away from TV or stereo set.
•Never put the remote controller at the place with humid or direct sunlight, or near heaters.
•Please insert the batteries properly.
INSTALLATION ORDER
1. Select the location;
2. Install the indoor unit;
3. Install the outdoor unit;
4. Install the connecting pipe;
5. Connect the drain pipe;
6. Wiring;
7. Test operation.
Select the location Install the indoor unit Install the outdoor unit
Install the connecting pipe Connect the drain pipe Wiring
Test operation

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3. ATTACHED FITTINGS
Please check whether the following fittings are of full scope. If there are some attached fittings free from
use, please restore them carefully.
Installation Fittings Tubing & Fittings
1. Expansible hook......................................... 4
2. Installation hook......................................... 4
3. Installation paper board ............................. 1
4. Bolt M5 X 16 or M6 X 12............................ 4
5. Connecting pipe group ...............................1
6. Binding tape................................................6
7. Soundproof / insulation sheath...................2
Drainpipe Fittings Protect Pipe Fittings
13. Wall conduit..............................................1
14. Wall conduit cover ....................................1
Others
8. Out-let pipe sheath..................................... 1
9. Out-let pipe clasp....................................... 1
10. Tightening band ..................................... 20
11. Drain elbow .............................................. 1
12. Seal ring................................................... 1
Remote controller & Its Frame
19. Owner's manual........................................1
20. Installation manual....................................1
15. Remote controller..................................... 1
16. Frame....................................................... 1
17. Mounting screw (ST2.9 x 10-C-H) ........... 2
18. Alkaline dry batteries (AM4)..................... 2

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4. INSTALLATION PLACE
CAUTION
Location in the following places may cause malfunction of the machine. (If unavoidable, please consult
your local dealer)
a. There is petrolatum existing.
b. There is salty air surrounding (near the coast).
c. There is caustic gas (the sulfide, for example) existing in the air (near a hot spring).
d. The Volt vibrates violently (in the factories).
e. In buses or cabinets.
f. In kitchen where it is full of oil gas.
g. There is strong electromagnetic wave existing.
h. There are inflammable materials or gas.
i. There is acid or alkaline liquid evaporating.
j. Other special conditions.
NOTICES BEFORE INSTALLATION
1. Select the correct carry-in path.
2. Move this unit as originally packaged as possible.
3. 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.
1. 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 influence of external air is the least.
•The air flow can reach throughout the room.
•The connecting pipe and drainpipe could be extracted out easily.
•There is no direct radiation from heaters.
2. 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. It must be a dry
and well ventilating place.
•The support is flat and horizontal and can stand the weight of the outdoor unit. And will no additional
noise or vibration.
•Your neighborhood will not feel uncomfortable with the noise or expelled air. There is no leakage of
combustible air.
•It is easy to install the connecting pipe or cables.
•Determine the air outlet direction where the discharged air is not blocked.
•A place free of a leakage of combustible gases.
•In the case that the installation place is exposed to a strong wind such as a seaside or high position,
secure the normal fan operation by putting the unit lengthwise along the wall or using a duct or shield
plates.
•If possible, do not install the unit where it is exposed to direct sunlight.
•If necessary, install a blind that does not interfere with the air flow.
•During the heating mode, the water drained off the outdoor unit.The condensate should be well drained
away by the drain hole to an appropriate place, so as not to interfere other people or public.
•Select the position where it will not be subject to snow drifts, accumulation of leaves or other seasonal
debris. It is important that the air flow for the outdoor unit is not impeded as this will result in reduction in
heating or cooling performance.

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5. INDOOR UNIT INSTALLATION
1. Installation place
•A place where there is enough room for installation and maintenance.(Refer to Chart 1)
•The ceiling is structurally sound to hold the Indoor Unit.
•A place that is well ventilated and the influence of weather is the least.
•A place that the airflow can reach every corners of the room.
•A place where the drain pipe can reach out easily.
Necessary room
MODEL 12-18(600x600)
•Install the outdoor unit on a rigid base to prevent increasing noise level and vibration.
•Determine the air outlet direction where the discharged air is not blocked.
•In the case that the installation place is exposed to strong wind such as a seaside or high position,
secure the normal fan operation by putting the unit length wise along the wall or using a duct or
shield plates.
•Specially in windy area, install the unit to prevent the admission of wind.
2. Indoor unit installation Model 12-18(600x600)
(1) Install the main body
A. The existing ceiling (to be horizontal)
a. Please cut a quadrangular hole of 600X600mm in the ceiling according to the shape of the
installation paper board.
The center of the hole should be at the same position of that of the air conditioner body.
Determine the lengths and outlets of the connecting pipe, drain pipe and cables.
To balance the ceiling and to avoid vibration, please enforce the ceiling when necessary.
b. Please select the position of installation hooks according to the hook holes on the installation board.
Drill four holes of 12mm, 50~55mm deep at the selected positions on the ceiling. Then embed the
expansible hooks (fittings).
Face the concave side of the installation hooks toward the expansible hooks. Determine the length
of the installation hooks from the height of ceiling, then cut off the unnecessary part.
If the ceiling is extremely high, please determine the length of the installation hook according to facts.
Cut the installation hook open in the middle position, then use appropriate length of reinforcing rod
(φ12) to weld together.
Model 18, 24, 30, 36, 48

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The length could be calculated from Chart5:
Length = 210+L (in general, L is half of the whole length of the installation hook)
c. Please adjust the hexangular nuts on the four installation hooks evenly, to ensure the balance of the
body.
Use the transparent hose filled with water to check the lever of the main body from the four sides or
diagonal line direction, the lever indicator also can check the lever from four sides of the main body.
(Refer to chart 6)
If the drainpipe is awry, leakage will be caused by the malfunction of the water-level switch.
Adjust the position to ensure the gaps between the body and the four sides of ceiling are even.
The body's lower part should sink into the ceiling for 10~12mm (Refer to chart5).
Locate the air conditioner firmly by wrenching the nuts after having adjusted the body's position well.
B. New built houses and ceilings
a. In the case of new built house, the hook can be embedded in advance (refer to the A.b mentioned
above). But it should be strong enough to bear the indoor unit and will not become loose because
of concrete shrinking.
b. After installing the body, please fasten the installation paper board onto the air conditioner with
bolts (M5X16) to determine in advance the sizes and positions of the hole opening on ceiling.
Please first guarantee the flatness and horizontal of ceiling when installing it. Refer to the A.a
mentioned above for others.
c. Refer to the A.c mentioned above for installation.
d. Remove the installation paper board.

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(2) Install The Panel
Cautions: Never put the panel face down on floor or against the wall, or on bulgy objects.
Never crash or strike it.
1) Remove the inlet grid.
a. Slide two grid switches toward the middle at the same time, and then pull them up. (Refer to chart 9)
b. Draw the grid up to an angle of about 45, and remove it. (Refer to chart 10)
2) Install the panel
a. Align the swing motor on the panel to the water receiver of the body properly. (Refer to chart 11)
b. Hang the four fixed rope of the main body to the installation cover and the other three covers of the
swing motor: (Refer to chart 11)
CAUTIONS: The installation cover of the swing motor must sink into the corresponding water
receiver.
c. Install the panel on the main body with bolt (M5X16) and washer. (Refer to chart 11)
d. Adjust the four panel hook screws to keep the panel horizontal, and screw them up to the ceiling
evenly.
e. Regulate the panel in the direction of the arrow in Chart 11 (3) slightly to fit the panel's center to the
center of the ceiling's opening. Guarantee that hooks of four corners are fixed well.
f. Keep fastening the screws under the panel hooks, until the thickness of the sponge between the
body and the panel's outlet has been reduced to about 4~6mm. The edge of the panel should
contact with the ceiling well. (Refer to chart 12)
Malfunction described in Chart 13 can be caused by inappropriate tightness the screw.
If the gap between the panel and ceiling still exists after fastening the screws, the height of the
indoor unit should be modified again. You can modify the height of the indoor unit through the
openings on the panel's four corners, if the lift of the indoor unit and the drainpipe is not
influenced (refer to chart 14-right).
3) Hang the air-in grid to the panel, then connect the lead terminator of the swing motor and that of the
control box with corresponding terminators on the body respectively.

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4) Relocate the air-in grid in the procedure of reversed order, install the air-in grid.
3. Indoor unit installation Model 18-24, 30-36-48
(1)Install the main body
A. The existing ceiling (to be horizontal)
a. Please cut a quadrangular hole of 880X880mm in the ceiling according to the shape of the
installation paper board. (Refer to Chart 3, 4)
The center of the hole should be at the same position of that of the air conditioner body.
Determine the lengths and outlets of the connecting pipe, drain pipe and cables.
To balance the ceiling and to avoid vibration, please enforce the ceiling when necessary.
b. Please select the position of installation hooks according to the hook holes on the installation board.
Drill four holes of 12mm, 45~50mm deep at the selected positions on the ceiling. Then embed the
expansible hooks (fittings).
Face the concave side of the installation hooks toward the expansible hooks. Determine the length
of the installation hooks from the height of ceiling, then cut off the unnecessary part.
If the ceiling is extremely high, please determine the length of the installation hook according to facts.
The length could be calculated from Chart5:
Length=H-181+L(in general, L is half of the whole length of the installation hook)
c. Please adjust the hexangular nuts on the four installation hooks evenly, to ensure the balance of the
body.
If the drainpipe is awry, leakage will be caused by the malfunction of the water-level switch.
Model 18-24 30-36-48

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Adjust the position to ensure the gaps between the body and the four sides of ceiling are even.The
body's lower part should sink into the ceiling for 10~12mm (Refer to chart5).
Locate the air conditioner firmly by wrenching the nuts after having adjusted the body's position well.
B. New built houses and ceilings
a. In the case of new built house, the hook can be embedded in advance (refer to the A.b mentioned
above). But it should be strong enough to bear the indoor unit and will not become loose because
of concrete shrinking.
b. After installing the body, please fasten the installation paper board onto the air conditioner with
bolts (M6X12) to determine in advance the sizes and positions of the hole opening on ceiling.
Please first guarantee the flatness and horizontal of ceiling when installing it.Refer to the A.a
mentioned above for others.
c. Refer to the A.c mentioned above for installation.
d. Remove the installation paper board.
(2)Install The Panel
1) Remove the inlet grid.
a. Slide two grid switches toward the middle at the same time, and then pull them up. (Refer to chart 8)
b. Draw the grid up to an angle of about 45, and remove it. (Refer to chart 9)
2) Remove the installation covers at the four corners.
Wrench off the bolts, loose the rope of the installation covers, and
remove them. (Refer to chart 10)
3) Install the panel
a. Align the swing motor on the panel to the tubing joints of the body
properly. (Refer to chart 11)
b. Fix hooks of the panel at swing motor and its opposite sides to the
hooks of corresponding water receiver. Then hang the other two panel hooks
onto corresponding hangers of the body.
c. Adjust the four panel hook screws to keep
the panel horizontal, and screw them up to
the ceiling evenly.
d. Regulate the panel in the direction of the
arrow in Chart 11(4) slightly to fit the
panel's center to the center of the ceiling's
opening. Guarantee that hooks of four
corners are fixed well.

Malfunction described in Chart 13 can be
caused by inappropriate tightness the screw.
If the gap between the panel and ceiling still
exists after fastening the screws, the height of
the indoor unit should be modified again. (Refer
to chart 14-left)
You can modify the height of the indoor unit
through the openings on the panel's four corners, if
the lift of the indoor unit and the drainpipe is not
influenced (refer to chart 14-right).
4) Hang the air-in grid to the panel, then connect
the lead terminator of the swing motor and that
of the control box with corresponding
terminators on the body respectively.
5) Relocate the air-in grid in the procedure of
reversed order.
6) Relocate the installation cover.
a. Fasten the rope of installation cover on the bolt
of the installation cover. (Refer to chart 15-left)
b. Press the installation cover into the panel
slightly. (Refer to chart 15-right)

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6. OUTDOOR UNIT INSTALLATION
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 violent, please install the outdoor unit
against the wall to ensure normal performance.
•Use a baffle when necessary.
•In the case of extremely strong wind, please prevent the air from flowing 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.
Chart 16
NECESSARY ROOM FOR INSTALLATION AND MAINTENANCE
(Refer to chart 17,chart 18)
If possible, please remove the obstacles nearby to prevent the performance from being impeded by too
little of air circulation.
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 room. Leave open two of the three
directions (A,B,C)
MOVING AND INSTALLING
•Since the gravity center of this unit is not at its physical center, so please be careful when lifting it
with a sling.
•Never hold the air-in of the outdoor unit to prevent it from deforming.
•Do not touch the fan with hands or other objects.
•Do not lean it more than 45º, and do not lay it sidelong.
•Please fasten the feet of this unit with bolts firmly to prevent it from collapsing in case of earthquake
or strong wind.
•Make concrete foundation of the size of 590*328. (Refer to chart 18)

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7. INSTALL THE CONNECTING PIPE
(1) Maximum pipe length
Model Max. Length Max. Elevation
(2) Piping sizes
Model Liquid (mm/inch) Gas (mm/inch)
12-18 6.35 (1/4)12.7 (1/2)
24/30 9.52 (3/8) 16.0 (5/8)
36-48 12.7 (1/2) 19.0 (3/4)
CAUTIONS
•Do not let air, dust, or other impurities fall in the pipe system during the time of installation.
•The connecting pipe should not be installed until the indoor and outdoor units have been fixed already.
•Keep the connecting pipe dry, and do not let moisture in during installation.
The Procedure of Connecting Pipes
1. Measure the necessary length of the connecting pipe, and make it by the following way.
(Refer to "Connect The Pipes" for details)
1) Connect the indoor unit at first, then the outdoor unit.
•Bend the tubing in proper way. Do not harm to them.
CAUTION
•Daub the surfaces of the flare pipe and the joint nuts with frozen oil, and wrench it for 3~4 rounds
with hands before fasten the flare nuts. (Refer to chart 19)
•Be sure to use two wrenches simultaneously when you connect or disconnect the pipes.
2) The stop value of the outdoor unit should be closed absolutely (as original state). Every time you
connect it, first loosen the nuts at the part of stop value, then connect the flare pipe immediately (in
5 minutes). If the nuts have been loosened for a long time, dusts and other impurities may enter the
pipe system and may cause malfunction later. So please expel the air out of the pipe with refrigerant
before connection.
3) Expel the air (refer to the "Expel The Air") after connecting the refrigerant pipe with the indoor unit.
Then fasten the nuts at the repair-points.
Notices For Bendable Pipe
•The bending angle should not exceed 90.
•Bending position is preferably in the middle of the bendable pipe. The larger the bending radius the
better it is.
•Do not bend the pipe more than three times.
(12-18)/(24-48) 25/30m15/20m

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Bend the connecting pipe of small wall thickness (Φ9.53 mm)
•Cut out a desired concave at the bending part of the insulating pipe.
•Then expose the pipe (cover it with tapes after bending).
•To prevent collapsing or deforming, please bend the pipe at its biggest radius.
•Use bender to get a small radius pipes.
Use the market brass pipe
•Be sure to use the same insulating materials when you buy the brass pipe (more than 9mm thick).
2. Locate The Pipes
•Drill a hole in the wall (suitable just for the size of the wall conduit, 53, 71 series diameter is Φ90mm,
and 120, 105, 140 series diameter is Φ105 in general), then set on the fittings such as the wall
conduit and its cover.
•Bind the connecting pipe and the cables together tightly with binding tapes. Do not let air in, which
will cause water leakage by condensation.
•Pass the bound connecting pipe through the wall conduit from outside. Be careful of the pipe
allocation to do no damage to the tubing.
3. Connect the pipes.
4. Then, open the stem of stop values of the outdoor unit to make the refrigerant pipe
connecting the indoor unit with the outdoor unit in fluent flow.
5. Be sure of no leakage by checking it with leak detector or soap water.
6. Cover the joint of the connecting pipe to the indoor unit with the soundproof / insulating
sheath (fittings), and bind it well with the tapes to prevent leakage.
Flaring
1. Cut a pipe with a pipe cutter.
2. Insert a flare nut into a pipe and flare the pipe.
A(mm)Outside-diameter
(mm) Max Min
6.35 8.3 8.3
9.53 12.4 12.0
12.7 15.8 15.4
16 19.0 18.6
19 23.3 22.9
Fasten the nuts CAUTION
•Put the connecting tubing at the proper
position, wrench the nuts with hands, then
fasten it with a wrench. (Refer to Chart24)
Too large torque will harm the bellmouthing and
too small will cause leakage. Please determine
the torque according to Table 2.
Tubing Size Torque
6.35 1420~1720 N · cm (144~176kgf · cm)
9.53 3270~3990 N · cm (333~407kgf · cm)
12.7 4950~6030 N · cm (504~616kgf · cm)
16 6180~7540 N · cm (630~770kgf · cm)
19 9720~11860 N · cm (990~1210kgf · cm)
Table 2 (kg)

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Expel the air with a vacuum pump
(Refer to Chart 25)
(Please refer to its manual for the way of using manifold value.)
1. Loosen and remove the maintenance nuts of stop values A and B, and connect the charge hose of
the manifold value with the maintenance terminator of stop value A. (Be sure that stop values A and
B are both closed)
2. Connect the joint of the charge hose with the vacuum pump.
3. Open the Lo-lever of the manifold value completely.
4. Turn on the vacuum pump. At the beginning of pumping, loosen the
maintenance terminator nut of stop value B a little to check whether
the air comes in (the sound of the pump changes, and the indicator of
compound meter turns below zero). Then fasten the nut.
5. When the pumping has finished, close the Lo-lever of the manifold
value completely and turn off the vacuum pump.
•When you have pumped for over 15 minutes, please confirm that the
indicator of multi-meter is on 1.0 x 10-5 Pa(-76cmHg).
6. Loosen and remove the quadrangle cover of stop values A and B to
open stop value A and B completely, then fasten them.
7. Disassemble the charge hose from the repair-mouth of stop value A, and fasten the nut.
CAUTIONS
All the stop values should be opened before test operation. Each air
conditioner has two stop values of different sizes on the side of the outdoor
unit which operate as Lo-stop value and Hi-stop value, respectively.
(Refer to Chart 26)
Chart 26
CHECK THE LEAKAGE
Check all the joints with the leak detector or soap water. (refer to Chart 29)
NOTE: in the chart
A Lo-stop value
B Hi-stop value
C,D Joints of the connecting pipe to the indoor unit.
INSULATION
•Be sure to with insulating materials cover all the exposed parts of the flare pipe joints and refrigerant
pipe on the liquid-side and the gas-side. Ensure that there is no gap between them.
•Incomplete insulation may cause water condensation.
(3) Additional charge
When the length of the one-way pipe is less than 8m, additional refrigerant charge after vacuuming is
not necessary.
When the length of one-way pipe is over 8m, the quantity to be added is as follows (unit in gram):
Connective pipe length Air purging method Additional amount of refrigerant to be charged
Less than 8m Use refrigerant of outdoor unit
Over 8m Use vacuum pump or refrigerant
cylinder
30g(length-8m) (capacity≤20000btu/h.)
65g(length-8m) (capacity≥24000btu/h.)

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8. CONNECT THE DRAIN PIPE
1. Install the drainpipe of the indoor unit
•You can use a polyethylene tube as the drainpipe (out-dia.37-39mm, in-dia.32mm). It could be
bought at local market or from your dealer.
•Set the mouth of the drainpipe onto the root of the body's pump-pipe, and clip the drainpipe and the
out-let pipe sheath (fittings) together firmly with the out-let pipe clasp (fitting). CAUTIONS: Use your
strength carefully to prevent the pump-pipe from breaking.
•The body's pump pipe and the drainpipe (especially the indoor part) should be covered evenly with
the out-let pipe sheath (fittings) and be bound tightly with the constrictor to prevent condensation
caused by entered air.
•To prevent water from flowing backwards into the air conditioner while the air conditioner stops,
please lean the drainpipe down toward outdoor (outlet-side) at a degree of over 1/50. And please
avoid any bulge or water deposit. (Refer to Chart 28.a)
•Do not drag the drainpipe violently when connecting to prevent the
body from being pulled. Meanwhile, one support-point should be set
every 1~1.5m to prevent the drainpipe from yielding (Refer to Chart
28.b). Or you can tie the drainpipe with the connecting pipe to fix
it.(Refer to Chart 28.c)
•In the case of prolonged drainpipe, you had better tighten its indoor
part with a protection tube to prevent it from loosing.
•If the outlet of the drainpipe is higher than the body's pump joint, the
pipe should be arranged as vertically as possible. And the lift
distance must be less than 200mm, otherwise the water will overflow
when the air conditioner stops.(Refer to Chart 29)
•The end of the drainpipe should be over 50mm
higher than the ground or the bottom of the
drainage chute, and do not immerse it in water.
If you discharge the water directly into sewage,
be sure to make a U-form aquaseal by bending
the pipe up to prevent the smelly gas entering
the house through the drain pipe.
2. Drainage test
•Check whether the drainpipe is unhindered
•New built house should have this test done before
paving the ceiling.
1) Remove the test cover, and stow water of about
2000ml to the water receiver through the stow
tube. (Refer to Chart 30)
2) Turn on the power, and operate the air conditioner
under the "COOLING" mode. Listen to the sound
of the drain pump. Check whether the water is
discharger well (a lag of 1min is allowed before
discharging, according to the length of the drain
pipe), and check whether water leaks from the
joints.

17
CAUTIONS: If there is any malfunction, please resolve it immediately.
3) Stop the air conditioner, turn off the power, and reset the test cover to its original position.
•The drain plug is used to empty the water-receiver for maintenance of the air conditioner. Please
stuff it imposition at all times during operation to avoid leakage.
3. Drain Elbow Installation
Fit the seal into the drain
elbow, then insert the drain
elbow into the base pan hole
of outdoor, rotate 90º to
securely assemble them.
Connect the drain elbow with
an extension drain hose
(Locally purchased), in case
of the condensate draining off
the outdoor unit during the
heating mode.
9. INSTALLATION OF FLANGE AND DUCT
Fresh air is intaken by indoor fan motors or ductable fan motor devices on field. The positions of fresh
air intakecan be changed according to the installation of ductable fan motor.
Note:
1. The device can be installed in ceiling cassette type indoor units (several-direction flow).
2. When installing the device, duct is needed on field and the rated diameter is 75mm.
When metal duct pass through wooden wall, electric insulation must be add between duct and wall.
The duct must be pulled out downside to prevent rain and water entering.
Net cover must be set at places where duct explodes to outdoor air to prevent birds and animals
entering.

18
For different type of indoor units, the installation methods are different and the position of holes are different.
1. Removal the hole on the board.
Installation Type 1
The hole is oppose to drainage pipe
Installation Type 2
The hole is oppose to refrigerant pipe