Lennox PISO-TECHO Installation Manual

INSTALLATION MANUAL

For correct installation, read this manual before starting installation.
This manual may be subject to change without notice for purpose of improvement.

CEILING AND FLOOR TYPE

AIR CONDITIONER

CONTENT

Installation precaution...........................................................................1

Installation place......................................................................................1

Accessories.................................................................................................2

Indoor unit installation.........................................................................3

Install the connecting pipe................................................................7

Connect the drain pipe..........................................................................9

Wiring.............................................................................................................10

Test operation...........................................................................................15

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

1

To install properly, please read this 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.
No further announcement if there is any ch­ange of this manual caused by product imp­rovement.

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.

INSTALLATION PRECAUTION

The Indoor Unit

INSTALLATION PLACE

Location in the following places may cause
malfunction of the machine. (If unavoidable,
please consult your local dealer.)

a. There exists petrolatum.
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.

Cautions

Notes 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 stand­ ards to electrical appliances.

4. Installation work must be performed in ac­ cordance with the national wiring Stand­ ards by authorized personnel only.

NOTE:

Remark per EMC Directive 89/336/EEC
For to prevent flicker impressions during the start of the compressor (technical process),
following installation conditions 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
a 32A fusing point.at

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
restrictions do apply for products like washing machines, air conditioners or electrical if
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.

1. Remote controller..................1

2. Frame...................................1

3. Mounting screw

(ST2.9x10-C-H).....................2

4. Alkaline dry batteries(AM4)

...............................................2

Remote controller & Its Frame

1

2

3

Remote
controller

Remote controller
holder

Mounting screw B
ST2.9x10-C-H

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.

Cautions on remote controller installation

ACCESSORIES

2

1
1
2

Name of Accessories
Owner's manual
Installation manual

Q'ty

(This manual)

Qutline

Usage

Hook

For wall mountin g installation

Hanging arm

2

For ceiling inst allation

Tapping screw

4

For Hook Install ation

3

INDOOR UNIT INSTALLATION

Carry out the pipe and line operation in the ceiling after finishing 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.

Wooden construction

Installing f10 hanging screw bolts. (4 bolts)

Please refer to the following figure 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 specific procedures.

1. The size of the ceiling to be handled ... ... do keep the ceiling flat. Consolidate the roof

beam for possible vibration.

2. Cut off the roof beam.

3. Strengthen the place cut off, and consolidate the roof beam.

Put the square timber traversely over the
roof beam, then install the hanging screw
bolts. (Refer to Chart 1)

Chart 1

Timber over the beam

Roof beam

Hanging screw bolts

Ceiling

New concrete bricks

(Blade shape insertion)

(Slide insertion)

Chart 2

Inlaying or embedding the screw bolts.
(Refer to Chart 2)

Install and use directly the supporting angl
steel. (Refer to chart 4)

e

For Original concrete bricks

Use embedding screw bold, crock and stick
harness. (Refer to Chart 3)

Steel roof beam structre

Steel bar

Hanging screw bolt

Hanging bolts

Supporting
angle steel

Embedding screw bolt

Chart 3

Chart 4

(Pipe hanging and embedding
screw bolt)

4

Wall Mounting Installtion

Chart 5

E. Connecting point of
refrigerant pipe

(D. gas side)

D. Connecting point of
refrigerant pipe

(E. Liquid side)

Drain point

Hook

Chart 6

Was he r

1.Fix the hook with tapping screw onto the wall.(Refer to Chart 6)

2.Hang the indoo r unit on the hook.

Tapping s cr ew

<6mm

Hook

Chart 8

5

Ceiling Installation

Chart 7

1.Remove the sid e board and the grille.(Refer to Cha rt 8)

Side bo ar d

Screw nut

Washer

Hanging
screw bolt

Hanging arm

Chart 9

20～25mm

Mount in g bo lt (max. 40 mm )

2.Locate the han ging arm on the hanging screw bolt.( Refer to Chart 9)
Prepare the moun ting bolts on the unit.( Refer to Char t 10)

Chart 10

8～13mm

Hangi ng a rm

Grill e

(For models 4800 0 and 60000 Btu/h, do not remove the gri lle.)

6

Type

( )

Btu/h

18000-24000Btu/h

36000Btu/h

A

B

D

48000-60000Btu/h

Note:The dimension of 18000Btu/h and 24000Btu/h are the same

The dimension of 48000Btu/h and 60000Btu/h are the same

D. Connecting point of
refrigerant pipe

(D.gas side)

Drain point

E. Connecting point of
refrigerant pipe

(E. Liquid side)

The dimension of the unit

E

F G

Chart 11

3.Hang the unit on t he hanging arm by sliding backward . Securely tighten
the mounting bol ts on both sides.(Refer to Chart 9)

H

C

ATTENTION:
which may differ from the unit you purchased.

The figures above are based on model with 18000Btu/h as rated capacity,

990

660

206

505 506

907

200

203

1280

660 206

795 506

1195

200

203

1670

680

244 1070

450

1542 200 240

Hangi ng a rm

Mount in g bo lt

Hanging
screw bolt

Downw ar d de cl ivity

Lower b et we en ( 1-2)/ 10 0

INSTALL THE CONNECTING PIPE

Check whether the height drop between the indoor unit and outdoor unit, the length of
refrigerant pipe, and the number of the bends meet the following requirements:

The max height drop...................................................................................................20m

(If the height drop is more than 10m, you had better put the outdoor unit over above the
indoor unit.)

The length of refrigerant pipe.......................................................................less than 30m

The number of bends....................................................................................Less than 15

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.

1) Connect the indoor unit at first, then the outdoor unit.
,

Bend the tubing in proper way. Don t harm them.

The Procedure of Connecting Pipes

1. Measure the necessary length of the connecting pipe, and make it by the following way.

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 12)
Be sure to use two wrenches simultaneously when you connect or disconnect the pipes.

Cautions

2) The stop valve 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 valve, 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.

o

The bending angle should not exceed 90 C
Bending position is preferably in the bendable pipe. The larger the better it is .
Do not bend the pipe more than three times.

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 of deforming, please bend the pipe at its biggest radius.
Use bender to get a small radius pipes.

3) Expel the air (refer to the “Expel The Air ) after connecting the refrigerant pipe with the
indoor unit and the outdoor unit.
Then fasten the nuts at the repair-points.

”

Notices For Benable pipe.

Bend the connecting pipe of small wall thickness.

7

Chart 12 Chart 13 Chart 14

Use frozen oil

Bend the pipe with thumb

Min-radius 100mm

Make the ends
straight

2. Locate The Pipe

1) Drill a hole in the wall (suitable just for the size of the wall conduit, 90mm in general), then
set on the fittings such as the wall conduit and its cover.

2) Bind the connecting pipe and the cables together tightly with binding tapes. Do not let air
in, which will cause water leakage by condensation.

3) 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 valves of the outdoor unit to make the refrigerant pipe conne­ cting the indoor unit with the outdoor unit fluently 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.

A

90+4

_

45+2

_

A(mm)

f6. 5mm3
f9.53mm
f12.7mm
f16mm
f19mm

8.7

8.3

15.8 15.4

12.4

12.0

19.0

18.6

23.3

22.9

1. Cut a pipe with a pipe cutter.

2. Insert a flare nut into a pipe and flare the pipe.

REFRIGERANT PIPE CONNECTION

Outside­diameter

Max Min

90

lean crude burr

Chart 16

Chart 15

Table 1

Too large torque will harm the bellmouthing and
too small will cause leakage. Please determine
the torque according to Table 2.

Chart a

Table 2

Put the connecting tubing at the proper position,
wrench the nuts with hands then fasten it with
a wrench. (Refer to Chart a)

Caution

f9.53

26~30

.

N m

f12.7

26~30

.

N m

Fasten the nut

Tubing Size

Torque

f19

9

35~40

.

N m

Be sure to use the same insulating materials when you buy the brass pipe. (More than
9mm thick)

Use the market brass pipe.

8

9

The drain pipe of indoor unit must be heat insulated, or it will condense dew, as well as
the connections of the indoor unit.
Hard PVC binder must be used for pipe connection, and make sure there is no leakage.
With the connection part to the indoor unit, please be noted not to impose pressure on the
side of indoor unit pipes.
When the declivity of the drain pipe downwards is over 1/100, there should not be any win
ding.
The total length of the drain pipe when pulled out traversely shall not exceed 20m, when
the pipe is over long, a prop stand must be installed to prevent winding.
Refer to the figures on the right for the installation of the pipes.

CONNECT THE DRAIN PIPE

1.5m~2m

Insulating
material

Downward declivity
lower than 1/100

VP30

Downward declivity
lower than 1/100

Put as deep as possible
(about 10cm)

Bend

S shape

1. Install indoor unit drain pipe

The outlet has PTI screw bread, Please use sealing materials and pipe sheath (fitting)
when connecting PVC pipes.

CAUTIONS

2. Drainage test

Check whether the drainpipe is unhindered
New built house should have this test done before paving the ceiling.

10

1. The air conditioner should use separate power supply with rated voltage

2. The external power supply to the air conditioner should have ground wiring, which is linked
to the ground wiring of the indoor and outdoor unit.

3. The wiring work should be done by qualified persons according to circuit drawing.

4. A leakage protector should be installed according to the National Standard concerning
electrical appliance.

5. Be sure to locate the power wiring and the signal wring well to avoid cross-disturbance and
their contact with connecting pipe or stop value body.

6. The wiring attached to this air conditioner is 10m long. Be sure to prolong it with wiring of
the same type and proper length if necessary. Generally, do not twist two wiring together
unless the joint is soldered well and covered with insulator tape.

7. Do not turn on the power until you have checked carefully after wiring.

8. If the power cord is damaged,replacement work shall be performed by authorized
personnel only.

Attaching wiring

The Specification of Power

WIRING

(A)

2

(mm )

2

(mm )

208-230V~, 60Hz

TYPE(Cooling only)

POWER

GROUND WIRING

OUTDOOR UNIT POWER
WIRING

STRONG ELECTRIC
SIGNAL

INDOOR/OUTDOOR
CONNECTING
WIRING

CIRCUIT BREAKER/FUSE

INDOOR UNIT POWER WIRING

PHASE 1-PHASE

FREQUENCY AND VOLT

25/12

35/16

36000Btu/h

1-PHASE

3x1.0

2.5

4.0

3x4.0

WEAK ELECTRIC
SIGNAL

3 x 2 . 5

1-PHASE

70/35

4.0

48000-60000Btu/h

3x4.0

3x1.0

Chat 18

24000Btu/h

208-230V~, 60Hz 208-230V~, 60Hz

3x1.0

2x1.0 2x1.0

2x1.0

(A)

2

(mm )

2

(mm )

208-230V~, 60Hz

TYPE(Cooling ＆Heating)

POWER

GROUND WIRING

OUTDOOR UNIT POWER
WIRING

STRONG ELECTRIC
SIGNAL

INDOOR/OUTDOOR
CONNECTING
WIRING

CIRCUIT BREAKER/FUSE

INDOOR UNIT POWER WIRING

PHASE 1-PHASE

FREQUENCY AND VOLT

25/12 35/16

48000Btu/h

1-PHASE

3x1.0

4.0

4.0

3x4.0

WEAK ELECTRIC
SIGNAL

3x4.0

1-PHASE

70/35

4.0

60000Btu/h

3x4.0

3x1.0

Chat 19

36000Btu/h

208-230V~, 60Hz 208-230V~, 60Hz

3x1.0

4x1.0 4x1.04x1.0

For 208-230V~ 60Hz OUTDOOR UNIT type

For 208-230V~ 60Hz OUTDOOR UNIT type

208-230V~, 60Hz

1-PHASE

25/12

2.5

3x2.5

24000Btu/h

3x1.0

4x1.0

Chat 20

(A)

2

(mm )

2

(mm )

208-230V 3N~, 60Hz

TYPE

POWER

GROUND WIRING

OUTDOOR UNIT POWER
WIRING

STRONG ELECTRIC
SIGNAL

INDOOR/OUTDOOR
CONNECTING
WIRING

CIRCUIT BREAKER/FUSE

INDOOR UNIT POWER WIRING

PHASE 3-PHASE

17.4/9.5

48000Btu/h

3-PHASE

3x1.0

2.5

5x2.5

WEAK ELECTRIC
SIGNAL

3-PHASE

25/15.8

3.3

60000Btu/h

5x3.3

3x1.0

208-230V 3N~, 60Hz

208-230V 3N~, 60Hz

2x1.0 2x1.0

208-230V~, 60Hz

PHASE 1-PHASE

FREQUENCY AND VOLT

1-PHASE

1-PHASE

208-230V~, 60Hz

208-230V~, 60Hz

INDOOR
UNIT

OUTDOOR
UNIT

FREQUENCY AND VOLT

36000Btu/h

25/12.9

3.3

5x3.3

3x1.0

2x1.0

11

Chat 21

(A)

2

(mm )

2

(mm )

380V 3N~, 60Hz

TYPE

POWER

GROUND WIRING

OUTDOOR UNIT POWER
WIRING

STRONG ELECTRIC
SIGNAL

INDOOR/OUTDOOR
CONNECTING
WIRING

CIRCUIT BREAKER/FUSE

INDOOR UNIT POWER WIRING

PHASE 3-PHASE

48000Btu/h

3-PHASE

WEAK ELECTRIC
SIGNAL

3-PHASE

60000Btu/h

380V 3N~, 60Hz

380V 3N~, 60Hz

208-230V~, 60Hz

PHASE 1-PHASE

FREQUENCY AND VOLT

1-PHASE

1-PHASE

208-230V~, 60Hz

208-230V~, 60Hz

INDOOR
UNIT

OUTDOOR
UNIT

FREQUENCY AND VOLT

36000Btu/h

17.4/13.4

3x1.0

2.5

5x2.5

17.4/14.1

3.3

5x3.3

3x1.0

2x1.0 2x1.0

17.4/13.4

3.3

5x3.3

3x1.0

2x1.0

For 208-230V 3N~ 60Hz OUTDOOR UNIT type

For 380V 3N~ 60Hz OUTDOOR UNIT type

Chat 22

CAUT IO N: When wiring, please choose the corresponding chart, or it may cause damage.The signs of the
terminal block of the indoor unit may be different from those in the following chat.Their signs may be respectively
L N L1 N1.

L N

XT2

XT1

Y/G

24V～

N1L1

XT1

L N C1 N1

Y/G

POWER

24V～

208-230V~60Hz

POWER

208-230V~60Hz

OUTDO OR UNIT

INDOO R UNIT

3-c ore cab le

3-c ore cab le

2-c ore cab le

For 24000~60000Btu/h (Cooling only) type

XT1

Y/G

POWER

L1

N1 43

XT1

L N C1 N1

Y/G

POWER

24V～

XT2

V1

F1

24V～

L

N

XT2

For 24000~60000Btu/h (Cooling ＆Heating) type

INDOO R UNIT

OUTDO OR UNIT

208-230V~ 60Hz

208-230V~ 60Hz

Chat 23

12

For 208-230V~ 60Hz OUTDOOR UNIT type

For 208-230V~ 60Hz OUTDOOR UNIT type

C

N

XT2

XT1

B
A

Y/G

POWER

L1

N1

XT1

L N C1 N1

POWER

24V～

Y/G

Chat 24

OUTDO OR UNIT

INDOO R UNIT

For 208-230V 3N~ 60Hz OUTDOOR UNIT type

208-230V 3N~ 60Hz

208-230V~ 60Hz

C

N

XT2

XT1

B
A

Y/G

POWER

L1

N1 43

XT1

L N C1 N1

Y/G

POWER

24V～

XT2

V1 F1

24V～

Chat 25

OUTDO OR UNIT

INDOO R UNIT

208-230V 3N~ 60Hz

208-230V~ 60Hz

For 24000~60000Btu/h (Cooling ＆Heating) type

13

For 24000~60000Btu/h (Cooling only) type

For 208-230V 3N~ 60Hz OUTDOOR UNIT type

C

N

XT2

XT1

B
A

Y/G

POWER

L1

N1

XT1

L N C1 N1

POWER

24V～

Y/G

Chat 26

OUTDO OR UNIT

INDOO R UNIT

For 24000~60000Btu/h (Cooling only) type

380V 3N~ 60Hz

208-230V~ 60Hz

C

N

XT2

XT1

B
A

Y/G

POWER

L1

N1 43

XT1

L N C1 N1

Y/G

POWER

24V～

XT2

V1

F1

24V～

Chat 27

OUTDO OR UNIT

INDOO R UNIT

380V 3N~ 60Hz

208-230V~ 60Hz

For 24000~60000Btu/h (Cooling ＆Heating) type

14

For 380V 3N~ 60Hz OUTDOOR UNIT type

For 380V 3N~ 60Hz OUTDOOR UNIT type

15

1. The test operation must be carried out after the entire installation has been completed.

2. Please confirm the following points before the test operation:

3. According to the user’s re quirement, in stall th e re mote c ontroller fr ame w here th e re mote
controller’s s ignal c an r each th e in door u nit s moothly.

4. Test operation

TEST OPERATION

The indoor unit and outdoor unit are installed properly.
Tubing and wiring are correctly completed.
The refrigerant pipe system is leakage-checked.
The drainage is unimpeded.
The heating insulation works well.
The ground wiring is connected correctly.
The length of the tubing and the added stow capacity of the refrigerant have been recorded.
The power voltage fits the rated voltage of the air conditioner.
There is no obstacle at the outlet and inlet of the outdoor and indoor and indoor units.
The gas-side and liquid-side stop values are both opened.
The air conditioner is pre-heated by turning on the power.

Set the air conditioner under the mode of “COOLING”with the remote controller, and
check the following points per the “Owner’s M anual”If th ere is a ny m alfunction, p lease
resolve it through chapter “Troubles And Causes ”in the “Owner’s Manual”.

1) The indoor unit

a. Whether the switch on the remote controller works well.
b. Whether the buttons on the remote controller works well.
c. Whether the air flow louver moves normally.
d. Whether the room temperature is adjusted well.
e. Whether the indicator lights normally.
f. Whether the temporary buttons works well.
g. Whether the drainage is normal.
h. Whether there is vibration or abnormal noise during operation.

2) The outdoor unit
a. Whether there is vibration or abnormal noise during operation.
b. Whether the generated wind, noise, or condensed water by the air conditioner have influ­ enced your neighborhood.
c. Whether any of the refrigerant is leaked.

Protection fun ction will delay the startup of compressor for 3 minutes
in case the unit is tu rned on immediately after power on o r restarted after
shutdown.

Cautions

QS01I-009AW

20 2 0 00 1 0 02 4 1
20 1 0 .0 5 . 07