14. PARTS LIST······················································74
15. OPTIONAL PARTS ···········································79
NOTE:
•This service manual describes technical data of outdoor units.
As for indoor units, refer to the service manual OB307, OB321, OB327, OB329,
OB336, OB345, OC302 or OC303.
Revision A:
• MXZ-A14WV -has been added.
E1
Revision B:
• MXZ-A14WV -and MXZ-A18WV -have been added.
E2E2
Revision C:
• “Check of HPS” has been corrected.
1
MXZ-14WV -
New model
MXZ-18TV -➔MXZ-A18WV -
1. Outdoor model has been changed.
2. Refrigerant has been changed. (R22➔R410A)
TECHNICAL CHANGES
E1
E1E2
MXZ-24UV -➔MXZ-A26WV -
1. Cooling capacity has been made larger. (7.1kW➔7.2kW)
2. Combinations of connectable indoor units have been increased.
3. Capacity class of connectable indoor units have been made larger.
4. Compressor has been changed. (THV247FBA➔TNB220FMCH)
5. Outdoor fan motor has been changed. (RA6V60-BA➔PM8H60-UA)
6. Refrigerant has been changed. (R22➔R410A)
7. Refrigerant system diagram has been changed.
• 1 of 2 high pressure switch has been removed.
• Accumulator has been removed.
• Receiver has been added.
MXZ-32SV -➔MXZ-A32WV -
1. Combinations of connectable indoor units have been increased.
2. Capacity class of connectable indoor units have been made larger.
3. Compressor has been changed. (THV247FBA➔TNB220FMCH)
4. Outdoor fan motor has been changed. (RA6V60-BA➔PM8H60-UA)
5. Refrigerant has been changed. (R22➔R410A)
6. Refrigerant system diagram has been changed.
• 1 of 2 high pressure switch has been removed.
• Accumulator has been removed.
• Receiver has been added.
MXZ-14WV -➔MXZ-A14WV -
1. Reversing valve has been changed.
2. Reversing valve coil has been changed.
3. Outdoor noise filter P.C.board has been changed.
E1E2
E1E2
E2E1
MXZ-18WV -➔MXZ-A18WV -
1. Reversing valve has been changed.
2. Reversing valve coil has been changed.
3. Outdoor noise filter P.C.board has been changed.
E2E1
2
Refrigeration
oil
Refrigerant
New refrigerant
R410A
HFC-32: HFC-125 (50%:50%)
Pseudo-azeotropic refrigerant
Not included
A1/A1
72.6
-51.4
1.557
64
Non combustible
0
1730
From liquid phase in cylinder
Possible
Incompatible oil
Non
Non
Previous refrigerant
R22
R22 (100%)
Single refrigerant
Included
A1
86.5
-40.8
0.94
44.4
Non combustible
0.055
1700
Gas phase
Possible
Compatible oil
Light yellow
Non
Refrigerant
Composition (Ratio)
Refrigerant handling
Chlorine
Safety group (ASHRAE)
Molecular weight
Boiling point (:)
Steam pressure [25:](Mpa)
Saturated steam density [25:](Kg/K)
Combustibility
ODP w1
GWP w2
Refrigerant charge method
Additional charge on leakage
Kind
Color
Smell
w1:Ozone Destruction Parameter : based on CFC-11
w2 :Global Warmth Parameter : based on CO
2
INFORMATION FOR THE AIR CONDITIONER WITH R410A REFRIGERANT
New SpecificationCurrent Specification
The incompatible refrigeration oil easily separates from
refrigerant and is in the upper layer inside the suction muffler.
Raising position of the oil back hole enables to back the
refrigeration oil of the upper layer to flow back to the
compressor.
Since refrigerant and refrigeration oil are compatible each,
refrigeration oil goes back to the compressor through the
lower position oil back hole.
Compressor
Suction muffler
Oil back hole
Refrigeration oil
Refrigerant
Compressor
Suction muffler
Oil back hole
Refrigerating oil /Refrigerant
Compressor
• This room air conditioner adopts HFC refrigerant (R410A) which never destroys the ozone layer.
• Pay particular attention to the following points, though the basic installation procedure is same as that for R22 conditioners.
1 As R410A has working pressure approximate 1.6 times as high as that of R22, some special tools and piping parts/
materials are required. Refer to the table below.
2 Take sufficient care not to allow water and other contaminations to enter the R410A refrigerant during storage and
installation, since it is more susceptible to contaminations than R22.
3 For refrigerant piping, use clean, pressure-proof parts/materials specifically designed for R410A. (Refer to 2. Refrigerant
piping.)
4 Composition change may occur in R410A since it is a mixed refrigerant. When charging, charge liquid refrigerant to prevent
composition change.
NOTE : The unit of pressure has been changed to MPa on the international system of units(SI unit system).
The conversion factor is: 1(MPa [Gauge]) =10.2(kgf/
ff
[Gauge])
3
-30 -20 -10010 20
30
40 5060
-0.5
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
(MPa [Gauge])
R410A
R22
Conversion chart of refrigerant temperature and pressure
Saturated liquid pressure
(:)
NOTE : The unit of pressure has been changed to MPa on the
R410A toolsCan R22 tools be used?
Gas leak detector
R410A has high pressures beyond the measurement range of existing
gauges. Port diameters have been changed to prevent any other refrigerant
from being charged into the unit.
Hose material and cap size have been changed to improve the pressure
resistance.
Dedicated for HFC refrigerant.
6.35 mm and 9.52 mm
Description
Clamp bar hole has been enlarged to reinforce the spring strength in the tool.
Provided for flaring work (to be used with R22 flare tool).
Provided to prevent the back flow of oil. This adapter enables you to use
vacuum pumps.
It is difficult to measure R410A with a charging cylinder because the
refrigerant bubbles due to high pressure and high-speed vaporization
No
No
No
Yes
Yes
New
New
New
Gauge manifold
Charge hose
Torque wrench
Flare tool
Flare gauge
Vacuum pump
adapter
Electronic scale for
refrigerant charging
No : Not Substitutable for R410A Yes : Substitutable for R410A
No12.7 mm and 15.88 mm
Wall thickness
Outside diameter
Pipe
mm
For liquid
For gas
6.35/9.52
9.52
12.7
15.88
0.8 mm/0.8 mm
0.8 mm
0.8 mm
1.0 mm
Heat resisting foam plastic
Specific gravity 0.045 Thickness 8 mm
Insulation material
international system of units(SI unit system).
The conversion factor is: 1(MPa [Gauge]) =10.2(kgf/ff[Gauge])
1.Tools dedicated for the air conditioner with R410A refrigerant
The following tools are required for R410A refrigerant. Some R22 tools can be substituted for R410A tools.
The diameter of the service port on the stop valve in outdoor unit has been changed to prevent any other refrigerant being
charged into the unit. Cap size has been changed from 7/16 UNF with 20 threads to 1/2 UNF with 20 threads.
2.Refrigerant piping
1 Specifications
Use the refrigerant pipes that meet the following specifications.
• Use a copper pipe or a copper-alloy seamless pipe with a thickness of 0.8 mm. Never use any pipe with a thickness less
than 0.8mm, as the pressure resistance is insufficient.
4
2 Flaring work and flare nut
Flaring work for R410A pipe differs from that for R22 pipe.
For details of flaring work, refer to Installation manual “FLARING WORK”.
Pipe diameter
mm
6.35
9.52
12.7
15.88
Dimension of flare nut
R410A
17
22
26
29
R22
17
22
24
27
3.Refrigerant oil
Apply the special refrigeration oil (accessories: packed with indoor unit) to the flare and the union seat surfaces.
4.Air purge
• Do not discharge the refrigerant into the atmosphere.
Take care not to discharge refrigerant into the atmosphere during installation, reinstallation, or repairs to the refrigerant
circuit.
• Use the vacuum pump for air purging for the purpose of environmental protection.
5.Additional charge
For additional charging, charge the refrigerant from liquid phase of the gas cylinder.
If the refrigerant is charged from the gas phase, composition change may occur in the refrigerant inside the cylinder and the
outdoor unit. In this case, ability of the refrigeration cycle decreases or normal operation can be impossible. However,
charging the liquid refrigerant all at once may cause the compressor to be locked. Thus, charge the refrigerant slowly.
Indoor units number
Piping total length
Connecting pipe length
Height difference (Indoor ~ Outdoor)
Height difference (Indoor ~ Indoor)
Function
Capacity [Rated (Min.~Max.) Hz]✽1
Dehumidification
Outdoor air flow
Power outlet
Running current ✽1
Power input
Auxiliary heater
Crankcase heater
Power factor ✽1
Starting current ✽1
Compressor motor current
Fan motor current
NOTE:•Test conditions are based on ISO 5151 (Refrigerant piping length (one way) :5m).
•Refer to “3. INDOOR/OUTDOOR CORRESPONDENCE TABLE” for the combination.
w Reference value
✽1 Measured under rated operating frequency.
✽2 Electrical data is for only outdoor unit.
✽3 These specifications are when all indoor units are operating.
TEST CONDITIONS COOLING INDOOR DB27.0°C WB19.0°C
OUTDOOR DB35.0°C WB24.0°C
HEATING INDOOR DB20.0°C
OUTDOOR DB 7.0°C WB 6.0°C
21
Outdoor model
Indoor units number
Piping total length
Connecting pipe length
Height difference (Indoor ~ Outdoor)
Height difference (Indoor ~ Indoor)
Function
Capacity [Rated (Min.~Max.) Hz]✽1
Dehumidification
Outdoor air flow
Power outlet
Running current ✽1
Power input
Auxiliary heater
Crankcase heater
Power factor ✽1
Starting current ✽1
Compressor motor current
Fan motor current
Model
Output
Winding
resistance (at 20:)
Model
Winding
resistance (at 20:)
Dimensions WOHOD
Weight
Sound level (High/Low )
NOTE:•Test conditions are based on ISO 5151 (Refrigerant piping length (one way) :5m).
•Refer to “3. INDOOR/OUTDOOR CORRESPONDENCE TABLE” for the combination.
w Reference value
✽1 Measured under rated operating frequency.
✽2 Electrical data is for only outdoor unit.
✽3 These specifications are when all indoor units are operating.
TEST CONDITIONS COOLING INDOOR DB27.0°C WB19.0°C
HEATING INDOOR DB20.0°C
OUTDOOR DB35.0°C WB24.0°C
OUTDOOR DB 7.0°C WB 6.0°C
22
6
90
80
70
60
50
40
30
20
10
631252505001000200040008000
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
OCTAVE BAND SOUND PRESSURE LEVEL, 0dB = 0.0002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
Test conditions.
Cooling :DB 35:WB 24:
Heating :DB 7:WB 6:
CoolingHigh
FUNCTION
FAN SPEED
HeatingHigh
49
SPL(dB(A))50LINE
MXZ-A18WV -
E1
MXZ-A18WV -
E2
90
80
70
60
50
40
30
20
10
631252505001000200040008000
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
OCTAVE BAND SOUND PRESSURE LEVEL, 0dB = 0.0002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
Test conditions.
Cooling :DB 35:WB 24:
Heating :DB 7:WB 6:
CoolingHigh
FUNCTION
FAN SPEED
HeatingHigh
46
SPL(dB(A))48LINE
MXZ-A26WV -
E1
MXZ-A32WV -
E1
90
80
70
60
50
40
30
20
10
631252505001000200040008000
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
OCTAVE BAND SOUND PRESSURE LEVEL, 0dB = 0.0002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
Test conditions.
Cooling :DB 35:WB 24:
Heating :DB 7:WB 6:
CoolingHigh
FUNCTION
FAN SPEED
HeatingHigh
48
SPL(dB(A))49LINE
MXZ-A14WV -
E1
MXZ-A14WV -
E2
OUTDOOR UNIT
MICROPHONE
1m
NOISE CRITERIA CURVES
23
7
(
)
OUTLINES AND DIMENSIONS
OUTDOOR UNIT
MXZ-A14WV MXZ-A14WV MXZ-A18WV MXZ-A18WV -
273
Drainage
3 holes
([33)
Air in
65
50
E1
E2
E1
E2
Open as a rule
More than100mm
if the front and both
sides are open
*
More than 100mm
200mm or more if
there are obstacles
to both sides
More than 350mm
587
Air in
Air out
121
500
840
REQUIRED SPACE
More than
34
330
360
40
69
100mm
Open as a rule
More than 200mm if the back,
both sides and top are open
Note:
*
The dimensions given along the arrrows above are required to guarantee
the air conditioner's performance. Install the unit in as wide a place as
possible for later service or repairs.
Service panel
Unit: mm
320
640
195
Liquid refrigerant valve
(flared [6.35)
B UNIT
}
A UNIT
}
90 65 65 65
Gas refrigerant valve
flared [9.52
24
Loading...
+ 56 hidden pages
You need points to download manuals.
1 point = 1 manual.
You can buy points or you can get point for every manual you upload.