f
9.5
f
12.7
f
15.9
0.065kg
0.115kg
0.190kg
H 8m
L
1
L
2
L
3
L
4
L
5
L
6
F
G
H
I
J
Outdoor Unit (one or more outdoor units)
The first Line Branch Pipe
Indoor Unit
Indoor Unit
In
do
or
U
ni
t t
o
In
do
or
U
ni
t
D
ro
p
H
ei
gh
t
Maximum Piping Equivalent Length L
(From the first Line branch pipe) Maximum piping
Equivalent Length L 20m
D
ro
p
H
ei
gh
t b
et
w
ee
n
In
do
or
un
it
an
d
ou
td
oo
r
U
ni
t
H
50
m
Digital Scroll Central Air Conditioner (Family used)
(Outdoor Unit)
Installation Manual
PRECAUTION
Precautions before reading the installation
manual.
1. This installation manual is for the outdoor
unit.
2. Refer to the indoor unit installation manual
for indoor parts installation.
3.Please read the power source unit installation
manual to install the power source unit .
4. Please refer to the refrigerant distributor
installation manual to install the refrigerant
distributor.
IMPORTANT CHECKING POINTS DURING INSTALLATION
INSTALLATION
Confirm the model and name of your air
conditioner to avoid installation mistakes.
REFRIGERANT PIPING
Separately purchased refrigerant distribu-
tor (branch connection, header branch
pipe) should be used in the process or
refrigerant piping.
Refrigerant piping should meet the specifi-
ed diameters.
Charge nitrogen under certain pressure in
the refrigerant piping before welding.
Refrigerant piping should undergo the heat
insulation process.
After the installing refrigerant piping, do not
electrify the indoor unit before the airtight
test and vacuum.
AIRTIGHT TEST
Refrigerant piping must be tested for gas
2
proof [2.94Mpa(30kg/cm ) nitrogen]
VACUUM
Vacuum pump must be used, and vacuum-
ing should be done from the gas side and
liquid side simultaneously.
ADD REFRIGERANT
When the actual pipe length is longer than
the base length,the every outdoor unit added
refrigerant volume is decided on the
calculating according to the actual length
of pipes.
Fill the form on the outdoor unit electric
control box with the added volume, length
of pipes (actual length) and the relative
height drop between outdoor unit and indoor
unit.
WIRING
Choose
power
capacity and wire
diameter
according to
the
design
manual. The
power
cord
of the
air conditioner should be wider
than the power cord of ordinary motor.
Never
unwind
or
cross
the
power
cord
(380V~) with
signal wire (low voltage)
between indoor and outdoor unit, or
malfunction
is unavoidable.
Connect the indoor unit to the power after
airtight test and vacuuming.
INSTALLATION LOCATION
CAUTION:
CAUTION:
There is combustible gas leakage existing.
There is much oil (including engine oil)
ingredient.
1. Please keep away from the following
place, or malfunction of the machine
may be caused:
There is salty air surrounding(near the
coast)
There is caustic gas (the sulfide, for exa-
mple) existing in the air (near a hotspring).
A place the heat air expelled out from the
outdoor unit can reach your neighbor's
window.
A place that the noise interferes your
neighbors every day life.
A place that is too weak to bear the
weight of the unit.
Uneven place.
Insufficient ventilation place.
Near a private power station or high
frequency equipment.
2. The insulation of the metal parts of the
building and the air conditioner should
comply with the regulation of National
Electric Standard.
INSTALLATION SPACE
CARRY IN THE OUTDOOR UNIT
Give owner
Give owner
For maintenance
For the toggle switch
1
1
1
1
1
ACCESSORIES(outdoor unit)
Model
Name
Outline
Usage
Outdoor unit installation manual
Indoor unit owner
s manual
Screws bag
Screw driver
This manual
Size and Connecting Method
Outdoor Unit
The first line branch pipe
1
1
2
2
2
2
2
3
3
3
3
3
3
3
3
3
3
f
19
(F
laring nut
)
f
9.53
(
Flaring nut
)
1. Table 1
Piping sizes and connecting method of the
outdoor unit.
Models
Gas Side
Liquid Side
3. Table 3
Piping sizes and connecting method of the
Indoor Unit.
4. Table 4
Select branch pipe
2. Table 2
Piping sizes at the branch pipe
f
19
(
Welding
)
f
9.53
(
Welding
)
Gas Side
Liquid Side
f1
9
.0(Flaring nut)
f
9.53(Flaring nut)
Gas Side
Liquid Side
Header branch pipe
FQG-01
Length and Drop Height Permitted of the Refrigerant piping
20m
20m
20m
8m
100m
L
1
+L
2
+L
3
+L
4
+L
5
+L
6
L
1
+L
3
+L
4
+L
5
+L
6
+e
L
3
+L
4
+L
5
+L
6
+e
+A+b+c+d+e
Permitted value
Total Pipe Length (Actual)
Maximum Piping (L)
Indoor Unit to Indoor Unit Drop Height
Indoor Unit-Outdoor
Unit Drop Height
Piping (farthest from the first line
pipe branch) Equivalent Length
Actual Length
Equivalent Length
Outdoor Unit Up
Outdoor Unit Down
P
ip
e
L
e
n
g
th
D
ro
p
H
e
ig
h
t
Piping
Make sure there is no any dirt or water
before connecting the piping to the outdoor
Units.
Wash the piping with high pressure nitrogen,
never use refrigerant of the outdoor unit.
Remove Dirt or Water in the Piping
Airtight Test
Charge pressured nitrogen after connecting
indoor unit/outdoor unit piping to do airtight
test.
CAUTION
2
1. Pressured nitrogen [2.94MPa (30kg/cm )]
should be used in the airtight test.
2. Tighten high pressure/low pressure
valves before applying pressured nitrogen.
3. Apply pressure from air vent mouth on the
high pressure/low pressure valves.
4. The high pressure/low pressure valves
are closed when applying pressured nitrogen.
5. The airtight test should never use any
oxygen, flammable gas or poisonous gas.
Air Purge with Vacuum Pump
Open All Valves
Refrigerant Amount to be Added
Using vacuum pump to do the vacuum,never
using refrigerant to expel the air .
Vacuuming should be done from both liquid
side and gas side simultaneously.
Calculate the added refrigerant according to the
diameter and the length of the liquid side
pipe of the outdoor unit/indoor unit connection.
OUTDOOR UNIT INSTALLATION
TEST RUNNING
The test running can not begin until the outdoor
unit has been connected to the power for 12hr.
e c
Outdoor unit owner
s manual
1
1.25
1.7
2
2.5
Outdoor Unit
Capacity Rating
28 type
45type
36 type
56 type
Capacity Rating
Capacity
(horsepower)
Capacity
(horsepower)
Capacity of outdoor
unit(horsepower)
Sum Capacity of indoor
unit(horsepower)
Maximum Quantity
of Indoor unit
71 type
22 type
0.8
Model: MDV-D100W/S MDV-D140W/S
MDV-D100W/SN
2
MDV-D140W/SN
2
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)
>30cm
>60cm
>
30
cm
>
20
0c
m
(Wall or obstacle)
Maintain channel
Air outlet
Air inlet
Air inlet
A
C
B
REFRIGERANT PIPE CONNECTING
FLARING
>
6
0
c
m
Fix with bolt
Necessary width
Deep foundation
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.
0
Do not lean it more than 45 , 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.
90
Lean crude burr
Chart 22
A
90
+4_
45+2
_
Chart 23
1. Cut a pipe with a pipe cutter.
2. Insert a flare nut into a pipe and flare
the pipe.(Table 1)
A(mm)
Max
Min
6.35
8.3
9.53
12.4
12.7
15.8
16
19.0
19
23.3
Outside-diameter
(mm)
8.3
12.0
15.4
18.6
22.9
Table 1
FASTEN THE NUT
Put the connecting tubing at the proper position,
wrench the nuts with hands, then fasten it with a
wrench.( Refer to Chart24)
Chart 24
Too large torque will harm the bellmouthing and
too small will cause leakage. Please determine
the torque according to Table 2.
f
6.35
.
1000~1200 N cm
f
9.53
.
1500~1800Ncm
f
12.7
.
2000~2300Ncm
f
16
6
.
2800~3200Ncm
f
19
9
.
3500~4000Ncm
Tubing Size
Torque
Table 2
CAUTION
Operate the stop values
Open the value stem until it reaches the limitator.
Do not open it any further.
Fasten the stop values with a wrench or such tools.
The wrench torque is listed in the Table 2
mentioned above.
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. The ON/OFF operation is described
in the left chart. (Refer to Chart 28)
Chart 28
Trap body
Repair mouth
System joint
Quadrangle-cover
Quadrangle-lever
Linking pipe joint
Joint nut
1) ON operation: Take off quadrangle cover, clip
the quadrangle head with a wrench and turn
it anticlockwise to the end. Then fasten the
quadrangle cover.
2) OFF operation: The operation is the same as
the ON operation, but you should turn it
clockwise this time.
Branch Piping between indoor units
(Indoor piping)
Refer to table 3 for indoor unit connection
pipes.
Branch Connection Selection
Select according to the indoor units general
design capacity which it connects to.But if
the indoor units design capacity is more than
the outdoor unit design capacity, then select
branch connection according to the outdoor
unit.
Header Branch Selection.
The selection should according to the
number of branches it connects to.
3
Branch Piping between branches
Select pipe diameters according to the
table 2.
2
Select Sizes of Refrigerant Pipes and Materials
Select Sizes of Refrigerant Pipes
Outdoor Unit the Piping at the first
branch (Main piping)
Refer to table 1 for outdoor unit pipe
sizes.
1
4
5
5
6
2~5
2~7
3
3
Method 1: Weld the branches
Method 2:Screw the branches
Outdoor Unit
f
19(Flaring nut)
f
9.53
(F
laring nut
)
Method 1
Method 2
TYPE
22~36
60m(140W)or 45m (120W,100W )
70m(140W)or 45m (120W,100W )
Liquid Side Piping
Diameter
Refrigerant to be Added
per meter piping
L
1
A
B
C
D
Outdoor Unit (one or more outdoor units)
Indoor Unit
50m
55m
10m
20m
20m
8m
100m
L
1
+A+B+C+D+E+F
L
1+
F
Permitted value
Total Pipe Length (Actual)
Maximum Piping (L)
Indoor Unit to Indoor Unit Drop Height
Indoor Unit-Outdoor
Unit Drop Height
Piping (farthest from the BS Equipment) Equivalent Length
Actual Length
Equivalent Length
Outdoor Unit Up
Outdoor Unit Down
P
ip
e
L
e
n
g
th
D
ro
p
H
e
ig
h
t
Piping
E
F
Piping (farthest from the BS Equipment) Equivalent Length
40m
A or B,C,D,E,F
L
1
L
2
L
3
Method 1
Method 2
L
2
L
3
2
Refrigerant Divider
(BS Equipment)
Refrigerant Divider
(BS Equipment)
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..
MDV-03I-010aW
MDV-D100W/S MDV-D140W/S
MDV-D100W/SN
2
MDV-D140W/SN
2
MDV-D100W/S
MDV-D100W/SN
2
MDV-D140W/S
MDV-D140W/SN
2
MDV-D100W/S
MDV-D140W/S
MDV-D100W/SN
2
MDV-D140W/SN
2
f
19
0.280kg
