Midea MDV-D100W/S Installation Manual

Digital Scroll Central Air Conditioner (Family used)
(Outdoor Unit)

Installation Manual

Model: MDV-D100W/S MDV-D140W/S
MDV-D100W/SN
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.
TEST RUNNING
The test running can not begin until the outdoor
unit has been connected to the power for 12hr.
ACCESSORIES(outdoor unit)
Model
Name
Outdoor unit installation manual
Outdoor unit owner s manual
Indoor unit owner s manual
Screws bag
Screw driver
CARRY IN THE OUTDOOR UNIT
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.
MDV-D140W/SN
2 2
MDV-03I-010aW
INSTALLATION LOCATION
CAUTION: CAUTION:
1. Please keep away from the following
place, or malfunction of the machine
may be caused:
There is combustible gas leakage existing.
There is much oil (including engine oil)
ingredient.
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
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)
(Wall or obstacle)
Air inlet
>30cm
B
Air inlet
Air outlet
A
REFRIGERANT PIPE CONNECTING
FLARING
Lean crude burr
90
Chart 22
1. Cut a pipe with a pipe cutter.
2. Insert a flare nut into a pipe and flare
the pipe.(Table 1)
MDV-D100W/S MDV-D140W/S
Outline
MDV-D100W/SN MDV-D140W/SN
2 2
1 This manual
1
1
1
1
Fix with bolt
Necessary width
Outside-diameter
(mm)
6.35
9.53
12.7
16
19
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)
CAUTION
Too large torque will harm the bellmouthing and
too small will cause leakage. Please determine
the torque according to Table 2.
Tubing Size
f6.35
f9.53
f12.7
f16 6
f19 9
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)
Trap body
Repair mouth
System joint
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.
Select Sizes of Refrigerant Pipes and Materials
Select Sizes of Refrigerant Pipes
Outdoor Unit
1
branch (Main piping)
Refer to table 1 for outdoor unit pipe
sizes.
2 Branch Piping between branches
Select pipe diameters according to the
Maintain channel
table 2.
>60cm
Branch Piping between indoor units
3
C
(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.
Chart 23
Capacity of outdoor
Outdoor Unit
unit(horsepower)
MDV-D100W/S
MDV-D100W/SN
2
MDV-D140W/S
MDV-D140W/SN
2
Capacity Rating
(horsepower)
22 type
28 type
36 type
Size and Connecting Method
Outdoor Unit
Usage
1
Give owner
The first line branch pipe
Give owner
For maintenance
For the toggle switch
Outdoor Unit
Method 2:Screw the branches
1. Table 1
Piping sizes and connecting method of the
outdoor unit.
Models
Deep foundation
MDV-D100W/S
MDV-D140W/S
MDV-D100W/SN
MDV-D140W/SN
2. Table 2
A(mm)
Piping sizes at the branch pipe
Max Min
8.3
8.3
12.4 12.0
15.8 15.4
19.0 18.6
3. Table 3
23.3
22.9 Piping sizes and connecting method of the
Indoor Unit.
Table 1
4. Table 4
Select branch pipe
Length and Drop Height Permitted of the Refrigerant piping
Maximum Piping (L)
Piping (farthest from the first line
Chart 24
pipe branch) Equivalent Length
Indoor Unit-Outdoor
Unit Drop Height
Indoor Unit to Indoor Unit Drop Height
Torque
.
1000~1200 N cm
.
1500~1800Ncm
.
2000~2300Ncm
The first Line Branch Pipe
.
2800~3200Ncm
.
3500~4000Ncm
Table 2
Maximum Piping (L)
Piping (farthest from the BS Equipment) Equivalent Length
Piping (farthest from the BS Equipment) Equivalent Length
Indoor Unit-Outdoor
Unit Drop Height
Indoor Unit to Indoor Unit Drop Height
Quadrangle-cover
Quadrangle-lever
Linking pipe joint
Joint nut
Chart 28
Remove Dirt or Water in the 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.
Airtight Test
Charge pressured nitrogen after connecting
indoor unit/outdoor unit piping to do airtight
the Piping at the first
test.
1. Pressured nitrogen [2.94MPa (30kg/cm )]
should be used in the airtight test.
2. Tighten high pressure/low pressure
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
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.
Open All Valves
Sum Capacity of indoor
Maximum Quantity Refrigerant Amount to be Added
of Indoor unit unit(horsepower)
Calculate the added refrigerant according to the
2~5
5
4
diameter and the length of the liquid side
2~7
6
5
pipe of the outdoor unit/indoor unit connection.
Capacity Capacity
Capacity Rating
(horsepower)
45type
0.8 1.7
56 type
2
1
71 type 2.5
1.25
OUTDOOR UNIT INSTALLATION
3
Keep this unit away from direct radiation of the
sun or other heaters.
2
2 2 If unavoidable, please cover it with a shelter.
2
3
3 3 3 In places near coast or with a high attitude where
3
the wind is violent, please install the outdoor unit
Method 1: Weld the branches
against the wall to ensure normal performance.
Refrigerant Divider Use a baffle when necessary.
(BS Equipment)
In the case of extremely strong wind, please
1 2
prevent the air from flowing backwards into the
outdoor unit. ( Refer to chart 16)
3
3 3 3
3 3
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
Gas Side
Liquid Side
does not mean that the same is applicable to the
f19
f9.53
situation of an airtight. Leave open two of three
(Flaring nut )
(Flaring nut)
2
directions A,B,C..
2
Gas Side Liquid Side
Method 1 f19(Welding)
f9.53(Welding)
Method 2 f19(Flaring nut) f9.53(Flaring nut)
TYPE Gas Side
Liquid Side
f19.0(Flaring nut) f9.53(Flaring nut)
22~36
Header branch pipe FQG-01
Permitted value Piping
L +L +L +L +L
1 2 3 4
Total Pipe Length (Actual)
100m
+A+b+c+d+e
Actual Length 60m(140W)or 45m (120W,100W )
L +L +L +L +L
1 3 4 5
Equivalent Length
70m(140W)or 45m (120W,100W )
L +L +L +L
20m 3 4 5
Outdoor Unit Up 20m
Outdoor Unit Down 20m
8m
Outdoor Unit (one or more outdoor units)
L L
1 2
Indoor Unit
L
3
Maximum Piping Equivalent Length L
(From the first Line branch pipe) Maximum piping
e c
Equivalent Length L 20m
H 8m
L L
L
6
4 5
F
G
H I
J
Indoor Unit
Method 1
Piping
Permitted value
100m
Total Pipe Length (Actual) L +A+B+C+D+E+F
1
Actual Length 50m
L F
1+
Equivalent Length 55m
10m A or B,C,D,E,F
40m
L
1
Outdoor Unit Up 20m
L
2
Outdoor Unit Down 20m
8m L
3
Outdoor Unit (one or more outdoor units)
Refrigerant Divider
(BS Equipment)
L
2
1
F
B C D
A E
Indoor Unit
Method 2
CAUTION
2
valves before applying pressured nitrogen.
Liquid Side Piping Refrigerant to be Added
Diameter per meter piping
f 9.5 0.065kg
f 12.7 0.115kg
0.190kg
f 15.9
f 19 0.280kg
+L
5 6
+e
6
+e
6