Mitsubishi MXZ-2F53VF, MXZ-2F33VF, MXZ-2F42VF-ET1, MXZ-2F42VF-E1, MXZ-2F53VF-E1 Service Manual
...
Models
MXZ-2F33VF
-
E1,
ET1
MXZ-2F42VF
-
E1,
ET1
MXZ-2F53VF
-
E1,
ET1
MXZ-2F53VFH
-
E1
MXZ-3F54VF
-
E1,
ET1
MXZ-3F68VF
-
E1,
ET1
MXZ-4F72VF
-
E1,
ET1
HFC
utilized
R32
SERVICE MANUAL
No. OBH790
OUTDOOR UNIT
NOTE:
RoHS compliant products have <G> mark
on the spec name plate.
PARTS CATALOG (OBB790)
Indoor unit service manual
MSZ-LN•VG Series (OBH766)
MSZ-EF•VG Series (OBH589)
MSZ-AP•VF Series (OBH799)
MSZ-AP•VG Series (OBH788)
MLZ-KP•VF Series (OBH801)
SLZ-M•FA Series
SEZ-M•DA Series
PCA-M•KA Series (OCH659)
PEAD-M•JA(L) Series (HWE16130)
CONTENTS
1. TECHNICAL CHANGES ···································3
2. SAFETY PRECAUTION ···································· 3
3. PART NAMES AND FUNCTIONS ··················· 13
4. SPECIFICATION ·············································· 14
5. NOISE CRITERIA CURVES ···························· 20
6. OUTLINES AND DIMENSIONS ······················ 22
7. WIRING DIAGRAM ·········································· 25
8. REFRIGERANT SYSTEM DIAGRAM ·············29
9. PERFORMANCE CURVES ····························· 35
10. ACTUATOR CONTROL ··································· 56
11. SERVICE FUNCTIONS ···································· 57
12. TROUBLESHOOTING ····································· 61
13. DISASSEMBLY INSTRUCTIONS ···················· 86
MXZ-2F33VF
MXZ-2F42VF
MXZ-2F53VF MXZ-2F53VFH
2
<Preparation before the repair service>
Prepare the proper tools.
Prepare the proper protectors.
Provide adequate ventilation.
After stopping the operation of the air conditioner, turn off the power-supply breaker and remove the power plug.
Discharge the capacitor before the work involving the electric parts.
<Precautions during the repair service>
Do not perform the work involving the electric parts with wet hands.
Do not pour water into the electric parts.
Do not touch the refrigerant.
Do not touch the hot or cold areas in the refrigeration cycle.
When the repair or the inspection of the circuit needs to be done without turning off the power, exercise great caution not to
touch the live parts.
Use the specifi ed refrigerant only
Never use any refrigerant other than that specified.
Doing so may cause a burst, an explosion, or fire when the unit is being used, serviced, or disposed of.
Correct refrigerant is specified in the manuals and on the spec labels provided with our products.
We will not be held responsible for mechanical failure, system malfunction, unit breakdown or accidents caused by
failure to follow the instructions.
OBH790
3
TECHNICAL CHANGES
1
MXZ-2F33VF -E1,
ET1
MXZ-2F42VF -E1,
ET1
MXZ-2F53VF -E1,
ET1
MXZ-2F53VFH -
E1
MXZ-3F54VF -E1,
ET1
MXZ-3F68VF -E1,
ET1
MXZ-4F72VF -E1,
ET1
1. New model
2-1. ALWAYS OBSERVE FOR SAFETY
Before obtaining access to terminal, all supply circuits must be disconnected.
2
SAFETY PRECAUTION
2-2. CAUTIONS RELATED TO NEW REFRIGERANT
Cautions for units utilizing refrigerant R32
Preparation before the repair service.
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Use a vacuum pump with a reverse flow check
valve.
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MEANINGS OF SYMBOLS DISPLAYED ON THE UNIT
WARNING
This mark is for R32 refrigerant only. Refrigerant type is written on nameplate of outdoor unit.
Read the OPERATION MANUAL carefully before operation.
Service personnel are required to carefully read the OPERATION MANUAL and INSTALLATION MANUAL before operation.
Further information is available in the OPERATION MANUAL, INSTALLATION MANUAL, and the like.
OBH790
4
Make sure that the inside and outside of refrigerant piping is clean and it has no contaminants
such as sulfur, oxides, dirt, shaving particles, etc,
which are hazard to refrigerant cycle.
In addition, use pipes with specified thickness.
Contamination inside refrigerant piping can cause deterioration of refrigerant oil, etc.
Store the piping indoors, and both ends of the
piping sealed until just before brazing.
(Leave elbow joints, etc. in their packaging.)
If dirt, dust or moisture enters into refrigerant cycle, that can
cause deterioration of refrigerant oil or malfunction of compressor.
The refrigerant oil applied to flare and flange
connections must be ester oil, ether oil or
alkylbenzene oil in a small amount.
If large amount of mineral oil enters, that can cause deterioration of refrigerant oil, etc.
Do not use refrigerant other than R32.
If other refrigerant (R22, etc.) is used, chlorine in refrigerant can cause deterioration of refrigerant oil, etc.
Handle tools with care.
If dirt, dust or moisture enters into refrigerant cycle, that can
cause deterioration of refrigerant oil or malfunction of compressor.
Use the following tools specifically designed for
use with R32 refrigerant.
The following tools are necessary to use R32 refrigerant.
Flare tool
Electronic refrigerant
charging scale
Vacuum pump adaptor
Size adjustment gauge
Gauge manifold
Torque wrench
Gas leak detector
Charge hose
Tools for R32
Ventilate the room if refrigerant leaks during
operation. If refrigerant comes into contact with
a flame, poisonous gases will be released.
Never use any refrigerant other than that specified.
Doing so may cause a burst, an explosion, or fire when the
unit is being used, serviced, or disposed of.
Correct refrigerant is specified in the manuals and on the
spec labels provided with our products.
We will not be held responsible for mechanical failure,
system malfunction, unit breakdown or accidents caused
by failure to follow the instructions.
Use the specified refrigerant only.
OBH790
5
[1] Warning for service
(1) Do not alter the unit.
(2) For installation and relocation work, follow the instructions in the Installation Manual and use tools and pipe components
specifically made for use with refrigerant specified in the outdoor unit installation manual.
(3) Ask a dealer or an authorized technician to install, relocate and repair the unit.
For appliances not accessible to the general public.
(4) Refrigerant pipes connection shall be accessible for maintenance purposes.
(5)
If the air conditioner is installed in a small room or closed room, measures must be taken to prevent the refrigerant concentra-
tion in the room from exceeding the safety limit in the event of refrigerant leakage. Should the refrigerant leak and cause the
concentration limit to be exceeded, hazards due to lack of oxygen in the room may result.
(6) Keep gas-burning appliances, electric heaters, and other fire sources (ignition sources) away from the location where
installation, repair, and other air conditioner work will be performed.
If refrigerant comes into contact with a flame, poisonous gases will be released.
(7) When installing or relocating, or servicing the air conditioner, use only the specified refrigerant (R32) to charge the refrig-
erant lines.
Do not mix it with any other refrigerant and do not allow air to remain in the lines.
If air is mixed with the refrigerant, then it can be the cause of abnormal high pressure in the refrigerant line, and may
result in an explosion and other hazards.
(8) After installation has been completed, check for refrigerant leaks. If refrigerant leaks into the room and comes into contact
with the flame of a heater or portable cooking range, poisonous gases will be released.
(9) Do not use low temperature solder alloy in case of brazing the refrigerant pipes.
(10)
When performing brazing work, be sure to ventilate the room sufficiently. Make sure that there are no hazardous or flam-
mable materials nearby.
When performing the work in a closed room, small room, or similar location, make sure that there are no refrigerant leaks
before performing the work.
If refrigerant leaks and accumulates, it may ignite or poisonous gases may be released.
(11) Do not install the unit in places where refrigerant may build-up or places with poor ventilation such as a semi-basement or a
sunken place in outdoor: Refrigerant is heavier than air, and inclined to fall away from the leak source.
(12)
Do not use means to accelerate the defrosting process or to clean, other than those recommended by the manufacturer.
(13)
The appliance shall be stored in a room without continuously operating ignition sources (for example: open flames, an
operating gas appliance or an operating electric heater).
(14)
Do not pierce or burn.
(15)
Be aware that refrigerants may not contain an odour.
(16)
Pipe-work shall be protected from physical damage.
(17)
The installation of pipe-work shall be kept to a minimum.
(18)
Compliance with national gas regulations shall be observed.
(19)
Keep any required ventilation openings clear of obstruction.
(20)
Servicing shall be performed only as recommended by the manufacturer.
(21)
The appliance shall be stored in a well-ventilated area where the room size corresponds to the room area as specified
for operation.
(22) Maintenance, service and repair operations shall be performed by authorized technician with required qualification.
(23)
Be sure to have appropriate ventilation in order to prevent ignition. Furthermore, be sure to carry out fire prevention
measures that there are no dangerous or flammable objects in the surrounding area.
[2] Cautions for service
(1) Perform service after recovering the refrigerant left in unit completely.
(2) Do not release refrigerant in the air.
(3) After completing service, charge the cycle with specified amount of refrigerant.
(4) When performing service, install a filter drier simultaneously.
Be sure to use a filter drier for new refrigerant.
[3] Additional refrigerant charge
When charging directly from cylinder
R32 is a single refrigerant and its composition does not change. Therefore, both liquid charging and gas charging are
possible. Liquid charging of refrigerant all at once from the low-pressure side may cause the compressor malfunction.
Accordingly, make sure that charging is gradual.
< Cylinder without a siphon tube >< Cylinder with a siphon tube >
Charging liquid refrigerant
Cylinder
Cylinder
Liquid
Valve
Liquid
Valve
OBH790
6
[4] Cautions for unit using R32 refrigerant
Basic work procedures are the same as those for conventional units using refrigerant R410A. However, pay careful
attention to the following points.
(1) Information on servicing
(1-1) Checks on the Area
Prior to beginning work on systems containing flammable refrigerants, safety checks are necessary to ensure that the
risk of ignition is minimized.
For repair to the refrigerating systems, (1-3) to (1-7) shall be completed prior to conducting work on the systems.
(1-2) Work Procedure
Work shall be undertaken under a controlled procedure so as to minimize the risk of a flammable gas or vapor being
present while the work is being performed.
(1-3) General Work Area
All maintenance staff and others working in the local area shall be instructed on the nature of work being carried out.
Work in confined spaces shall be avoided. The area around the workspace shall be sectioned off. Ensure that the conditions within the area have been made safe by control of flammable material.
(1-4) Checking for Presence of Refrigerant
The area shall be checked with an appropriate refrigerant detector prior to and during work, to ensure the technician is
aware of potentially toxic or flammable atmospheres. Ensure that the leak detection equipment being used is suitable
for use with all applicable refrigerants, i.e. non-sparking, adequately sealed or intrinsically safe.
(1-5) Presence of Fire Extinguisher
If any hot work is to be conducted on the refrigeration equipment or any associated parts, appropriate fire extinguishing
equipment shall be available to hand.
Have a dry powder or CO2 fire extinguisher adjacent to the charging area.
(1-6) No Ignition Sources
No person carrying out work in relation to a refrigeration system which involves exposing any pipe work shall use any
sources of ignition in such a manner that it may lead to the risk of fire or explosion. All possible ignition sources, including cigarette smoking, should be kept sufficiently far away from the site of installation, repairing, removing and disposal,
during which refrigerant can possibly be released to the surrounding space. Prior to work taking place, the area around
the equipment is to be surveyed to make sure that there are no flammable hazards or ignition risks. “No Smoking” signs
shall be displayed.
(1-7) Ventilated Area
Ensure that the area is in the open or that it is adequately ventilated before breaking into the system or conducting any
hot work. A degree of ventilation shall continue during the period that the work is carried out. The ventilation should
safely disperse any released refrigerant and preferably expel it externally into the atmosphere.
(1-8) Checks on the Refrigeration Equipment
Where electrical components are being changed, they shall be fit for the purpose and to the correct specification. At all
times the manufacturer’s maintenance and service guidelines shall be followed. If in doubt, consult the manufacturer’s
technical department for assistance.
The following checks shall be applied to installations using flammable refrigerants:
•
The charge size is in accordance with the room size within which the refrigerant containing parts are installed.
•
The ventilation machinery and outlets are operating adequately and are not obstructed.
•
Marking to the equipment continues to be visible and legible. Markings and signs that are illegible shall be corrected.
•
Refrigeration pipe or components are installed in a position where they are unlikely to be exposed to any substance
which may corrode refrigerant containing components, unless the components are constructed of materials which are
inherently resistant to being corroded or are suitably protected against being corroded.
(1-9) Checks on Electrical Devices
Repair and maintenance to electrical components shall include initial safety checks and component inspection procedures. If a fault exists that could compromise safety, then no electrical supply shall be connected to the circuit until it is
satisfactorily dealt with. If the fault cannot be corrected immediately but it is necessary to continue operation, an adequate temporary solution shall be used. This shall be reported to the owner of the equipment so all parties are advised.
Initial safety checks shall include that:
•
capacitors are discharged: this shall be done in a safe manner to avoid possibility of sparking;
•
no live electrical components and wiring are exposed while charging, recovering or purging the system;
•
there is continuity of earth bonding
(2) Repairs to Sealed Components
(2-1) During repairs to sealed components, all electrical supplies shall be disconnected from the equipment being worked
upon prior to any removal of sealed covers, etc. If it is absolutely necessary to have an electrical supply to equipment
during servicing, then a permanently operating form of leak detection shall be located at the most critical point to warn
of a potentially hazardous situation.
(2-2) Particular attention shall be paid to the following to ensure that by working on electrical components, the casing is not
altered in such a way that the level of protection is affected. This shall include damage to cables, excessive number of
connections, terminals not made to original specification, damage to seals, incorrect fitting of glands, etc.
Ensure that the apparatus is mounted securely.
Ensure that seals or sealing materials have not degraded to the point that they no longer serve the purpose of preventing the ingress of flammable atmospheres.
Replacement parts shall be in accordance with the manufacturer’s specifications.
OBH790
7
(3) Repair to intrinsically Safe Components
Do not apply any permanent inductive or capacitance loads to the circuit without ensuring that this will not exceed the
permissible voltage and current permitted for the equipment in use.
Intrinsically safe components are the only types that can be worked on while live in the presence of a flammable atmosphere. The test apparatus shall be at the correct rating.
Replace components only with parts specified by the manufacturer. Other parts may result in the ignition of refrigerant in
the atmosphere from a leak.
(4) Cabling
Check that cabling will not be subject to wear, corrosion, excessive pressure, vibration, sharp edges or any other adverse
environmental effects. The check shall also take into account the effects of aging or continual vibration from sources such
as compressors or fans.
(5) Detection of Flammable Refrigerants
Under no circumstances shall potential sources of ignition be used in the searching for or detection of refrigerant leaks.
A halide torch (or any other detector using a naked flame) shall not be used.
(6) Leak Detection Methods
Electronic leak detectors may be used to detect refrigerant leaks but, in the case of flammable refrigerants, the sensitivity
may not be adequate, or may need re-calibration. (Detection equipment shall be calibrated in a refrigerant-free area.)
Ensure that the detector is not a potential source of ignition and is suitable for the refrigerant used. Leak detection equipment shall be set at a percentage of the LFL of the refrigerant and shall be calibrated to the refrigerant employed, and the
appropriate percentage of gas (25% maximum) is confirmed.
Leak detection fluids are suitable for use with most refrigerants but the use of detergents containing chlorine shall be
avoided as the chlorine may react with the refrigerant and corrode the copper pipe-work.
If a leak is suspected, all naked flames shall be removed/extinguished.
If a leakage of refrigerant is found which requires brazing, all of the refrigerant shall be recovered from the system, or
isolated (by means of shut off valves) in a part of the system remote from the leak. For appliances containing flammable
refrigerants, oxygen free nitrogen (OFN) shall then be purged through the system both before and during the brazing process.
(7) Removal and Evacuation
When breaking into the refrigerant circuit to make repairs – or for any other purpose conventional procedures shall be
used. However, for flammable refrigerants it is important that best practice is followed since flammability is a consideration. The following procedure shall be adhered to:
• remove refrigerant
• purge the circuit with inert gas
• evacuate
• purge again with inert gas
• open the circuit by cutting or brazing.
The refrigerant charge shall be recovered into the correct recovery cylinders. For appliances containing flammable refrigerants, the system shall be “flushed” with OFN to render the unit safe. This process may need to be repeated several
times.
Compressed air or oxygen shall not be used for purging refrigerant systems.
For appliances containing flammable refrigerants, flushing shall be achieved by breaking the vacuum in the system with
OFN and continuing to fill until the working pressure is achieved, then venting to atmosphere, and finally pulling down to
a vacuum. This process shall be repeated until no refrigerant is within the system. When the final OFN charge is used,
the system shall be vented down to atmospheric pressure to enable work to take place. This operation is absolutely vital
if brazing operations on the pipe-work are to take place.
Ensure that the outlet for the vacuum pump is not close to any ignition sources and that ventilation is available.
(8) Charging Procedures
In addition to conventional charging procedures, the following requirements shall be followed:
•
Ensure that contamination of different refrigerants does not occur when using charging equipment. Hoses or lines
shall be as short as possible to minimize the amount of refrigerant contained in them.
•
Cylinders shall be kept upright.
•
Ensure that the refrigeration system is earthed prior to charging the system with refrigerant.
•
Label the system when charging is complete (if not already).
•
Extreme care shall be taken not to overfill the refrigeration system.
Prior to recharging the system, it shall be pressure-tested with the appropriate purging gas. The system shall be leaktested on completion of charging but prior to commissioning. A follow up leak test shall be carried out prior to leaving the
site.
(9) Decommissioning
Before carrying out this procedure, it is essential that the technician is completely familiar with the equipment and all its
detail. It is recommended good practice that all refrigerants are recovered safely. Prior to the task being carried out, an
oil and refrigerant sample shall be taken in case analysis is required prior to re-use of reclaimed refrigerant. It is essential
that electrical power is available before the task is commenced.
a) Become familiar with the equipment and its operation.
OBH790
8
b) Isolate system electrically.
c) Before attempting the procedure, ensure that:
• mechanical handling equipment is available, if required, for handling refrigerant cylinders;
• all personal protective equipment is available and being used correctly;
• the recovery process is supervised at all times by a competent person;
• recovery equipment and cylinders conform to the appropriate standards.
d) Pump down refrigerant system, if possible.
e) If a vacuum is not possible, make a manifold so that refrigerant can be removed from various parts of the system.
f) Make sure that cylinder is situated on the scales before recovery takes place.
g) Start the recovery machine and operate in accordance with manufacturer ’s instructions.
h) Do not overfill cylinders. (No more than 80 % volume liquid charge).
i) Do not exceed the maximum working pressure of the cylinder, even temporarily.
j) When the cylinders have been filled correctly and the process completed, make sure that the cylinders and the equip-
ment are removed from site promptly and all isolation valves on the equipment are closed off.
k) Recovered refrigerant shall not be charged into another refrigeration system unless it has been cleaned and checked.
(10) Labelling
Equipment shall be labelled stating that it has been de-commissioned and emptied of refrigerant. The label shall be
dated and signed. For appliances containing flammable refrigerants, ensure that there are labels on the equipment stating the equipment contains flammable refrigerant.
(11) Recovery
When removing refrigerant from a system, either for servicing or decommissioning, it is recommended good practice
that all refrigerants are removed safely. When transferring refrigerant into cylinders, ensure that only appropriate refrigerant recovery cylinders are employed. Ensure that the correct number of cylinders for holding the total system charge
are available. All cylinders to be used are designated for the recovered refrigerant and labelled for that refrigerant (i.e.
special cylinders for the recovery of refrigerant). Cylinders shall be complete with pressure-relief valve and associated
shut-off valves in good working order. Empty recovery cylinders are evacuated and, if possible, cooled before recovery
occurs.
The recovery equipment shall be in good working order with a set of instructions concerning the equipment that is at
hand and shall be suitable for the recovery of all appropriate refrigerants including, when applicable, flammable refrigerants. In addition, a set of calibrated weighing scales shall be available and in good working order. Hoses shall be complete with leak-free disconnect couplings and in good condition. Before using the recovery machine, check that it is in
satisfactory working order, has been properly maintained and that any associated electrical components are sealed to
prevent ignition in the event of a refrigerant release. Consult manufacturer if in doubt.
The recovered refrigerant shall be returned to the refrigerant supplier in the correct recovery cylinder, and the relevant
waste transfer note arranged. Do not mix refrigerants in recovery units and especially not in cylinders. If compressors or
compressor oils are to be removed, ensure that they have been evacuated to an acceptable level to make certain that
flammable refrigerant does not remain within the lubricant. The evacuation process shall be carried out prior to returning
the compressor to the suppliers. Only electric heating to the compressor body shall be employed to accelerate this process. When oil is drained from a system, it shall be carried out safely.
OBH790
9
2-3. PRECAUTIONS WHEN REUSING EXISTING R22/R410a REFRIGERANT PIPES
(1) Flowchart
[5] Service tools
Use the below service tools as exclusive tools for R32 refrigerant.
No. Tool name Specifications
Gauge manifold · Only for R32
· Use the existing fitting
specifications
. (UNF1/2)
· Use high-tension side pressure of 5.3MPa·G or over.
Charge hose · Only for R32
· Use pressure performance of 5.09MPa·G or over.
Electronic scale
—
Gas leak detector
· Use the detector for R134a, R407C, R410a or R32.
Adaptor for reverse flow check
· Attach on vacuum pump.
Refrigerant charge base
—
Refrigerant cylinder · Only for R32
· Cylinder with syphon
Refrigerant recovery equipment
—
• Refer to the fl owchart below to determine if the existing pipes can be used and if it is necessary to use a fi lter dryer.
• If the diameter of the existing pipes is different from the specifi ed diameter, refer to technological data materials to confi rm if
the pipes can be used.
Perform the airtight test, vacuum air purging,
additional refrigerant charging (if necessary),
and gas leak check.
Measure the existing pipe thickness and
check for damage.
The existing pipe thickness meets specifi ca-
tions and the pipes are not damaged.
Check if the existing air conditioner can operate.
After operating the cooling system for about 30
minutes, perform pump down work.
Disconnect the existing air conditioner from the
pipes.
Connect the new air conditioner.
Test run
The existing pipes cannot be reused.
Use new pipes.
Note:
If the existing air conditioner cannot operate, use a
refrigerant recovery device to collect the refrigerant.
Use new pipes for MXZ-3F/4F models.
The existing pipe thickness does not meet
specifi cations or the pipes are damaged.
OBH790
10
(2) Cautions for refrigerant piping work
New refrigerant R32 is adopted for replacement inverter series. Although the refrigerant piping work for R32 is same as for
R22, exclusive tools are necessary so as not to mix with different kind of refrigerant. Furthermore as the working pressure
of R32 is 1.6 times higher than that of R22, their sizes of flared sections and flare nuts are different.
Thickness of pipes
Because the working pressure of R32 is higher compared to R22, be sure to use refrigerant piping with thickness shown
below. (Never use pipes of 0.7 mm or below.)
Dimensions of flare cutting and flare nut
The component molecules in HFC refrigerant are smaller compared to conventional refrigerants. In addition to that, R32
is a refrigerant, which has higher risk of leakage because its working pressure is higher than that of other refrigerants.
Therefore, to enhance airtightness and strength, flare cutting dimension of copper pipe for R32 has been specified separately from the dimensions for other refrigerants as shown below. The dimension B of flare nut for R32 also has partly
been changed to increase strength as shown below. Set copper pipe correctly referring to copper pipe flaring dimensions
for R32 below. For 1/2 and 5/8 inch pipes, the dimension B changes.
Use torque wrench corresponding to each dimension.
Tools for R32 (The following table shows whether conventional tools can be used or not.)
1/4
3/8
1/2
5/8
3/4
6.35
9.52
12.70
15.88
19.05
0.8
0.8
0.8
1.0
—
0.8
0.8
0.8
1.0
1.0
Nominal
dimensions(inch)
Diagram below: Piping diameter and thickness
Outside
diameter
(mm)
Thickness
(mm)
R32/R410a R22
1/4
3/8
1/2
5/8
3/4
6.35
9.52
12.70
15.88
19.05
9.1
13.2
16.6
19.7
—
9.0
13.0
16.2
19.4
23.3
Nominal
dimensions(inch)
Flare cutting dimensions
Outside
diameter(mm)
R32/R410a R22
Dimension A
( )
+0
-0.4
(mm)
1/4
3/8
1/2
5/8
3/4
6.35
9.52
12.70
15.88
19.05
17.0
22.0
26.0
29.0 *
—
17.0
22.0
24.0
27.0
36.0
Nominal
dimensions(inch)
Flare nut dimensions
Outside
diameter(mm)
Dimension B
R32/R410a
* 36.0mm for
indoor unit
of RP100,
125 and 140
R22
(mm)
Dimension A
Dimension B
Tools and materials Use R32 tools Can R22 tools be used?
Can R407C tools be used?
Can R410a tools be used?
Gauge manifold Air purge, refrigerant
charge and operation
check
Tool exclusive for R32
Charge hose
Tool exclusive for R32
Gas leak detector Gas leak check Tool for HFC refrigerant
Refrigerant recovery
equipment
Refrigerant recovery Tool exclusive for R32
Refrigerant cylinder Refrigerant charge Tool exclusive for R32
Safety charger
Prevent compressor malfunction
when charging refrigerant by
spraying liquid refrigerant
Tool exclusive for R32
Charge valve
Prevent gas from blowing out
when detaching charge hose
Tool exclusive for R32
Vacuum pump
Vacuum drying and air
purge
Tools for other refrigerants
can be used if equipped
with adapter for reverse
fl ow check
(Usable if equipped with
adapter for reverse
fl ow)
(Usable if equipped with
adapter for reverse
fl ow)
(Usable if equipped with
adapter for reverse
fl ow)
Flare tool
Flaring work of piping
Tools for other refrigerants
can be used by adjusting
fl aring dimension
(Usable by adjusting
fl aring dimension)
(Usable by adjusting
fl aring dimension)
(Usable by adjusting
fl aring dimension)
Bender
Bend the pipes
Tools for other refrigerants
can be used
Pipe cutter
Cut the pipes
Tools for other refrigerants
can be used
Welder and nitrogen
gas cylinder
Weld the pipes
Tools for other refrigerants
can be used
Refrigerant charging
scale
Refrigerant charge
Tools for other refrigerants
can be used
Vacuum gauge or
thermistor vacuum
gauge and vacuum
valve
Check the degree of vacuum.
(Vacuum valve prevents back
fl ow of oil and refrigerant to
thermistor vacuum gauge)
Tools for other refrigerants
can be used
Charging cylinder Refrigerant charge Tool exclusive for R32 –
: Prepare a new tool. (Use the new tool as the tool exclusive for R32.)
: Tools for other refrigerants can be used under certain conditions.
: Tools for other refrigerants can be used.
OBH790
11
2-4. CHOOSING THE OUTDOOR UNIT INSTALLATION LOCATION
R32 is heavier than air—as well as other refrigerants—
so tends to accumulate at the base (in the vicinity of the
floor). If R32 accumulates around base, it may reach a
flammable concentration in case room is small. To avoid
ignition, maintaining a safe work environment is required
by ensuring appropriate ventilation. If a refrigerant leak is
confirmed in a room or an area where there is insufficient
ventilation, refrain from using of flames until the work
environment can be improved by ensuring appropriate
ventilation.
Install outdoor units in a place where at least one of the
four sides is open, and in a sufficiently large space without depressions.
2-5. MINIMUM INSTALLATION AREA
If you unavoidably install a unit in a space where all four sides are blocked or there are depressions, confirm that one of
these situations (A, B or C) is satisfied.
Note: These countermeasures are for keeping safety not for specification guarantee.
A) Secure sufficient installation space (minimum installation area Amin).
Install in a space with an installation area of Amin or more, corresponding to refrigerant quantity M (factory-charged
refrigerant + locally added refrigerant).
B) Install in a space with a depression height of 0.125 [m] or less.
OK OK
OK NG
Amin
Height from the bottom of
0.125 [m] or less
Height from the bottom of
0.125 [m] or less
M [kg] Amin [m²]
1.0 12
1.5 17
2.0 23
2.5 28
3.0 34
3.5 39
4.0 45
4.5 50
5.0 56
5.5 62
6.0 67
6.5 73
7.0 78
7.5 84
OBH790
12
C) Create an appropriate ventilation open area.
Make sure that the width of the open area is 0.9 [m] or more and the height of the open area is 0.15 [m] or more.
However, the height from the bottom of the installation space to the bottom edge of the open area should be 0.125 [m]
or less.
Open area should be 75% or more opening.
■ Indoor units
Install in a room with a floor area of Amin or more, corresponding to refrigerant quantity M (factory-charged refrigerant + locally added refrigerant).
* For the factory-charged refrigerant amount, refer to the spec nameplate or installation manual.
For the amount to be added locally, refer to the installation manual.
Install the indoor unit so that the height from the floor to the bottom of the indoor unit is h0;
for wall mounted: 1.8 m or more;
for ceiling suspended, cassette and ceiling concealed: 2.2 m or more.
* There are restrictions in installation height for each model, so read the installation manual for the particular unit.
75% or more opening
Width W 0.9 [m] or more
Height from the bottom
0.125 [m] or less
Height H 0.15 [m] or more
M [kg] Amin [m²]
1.0 3
1.5 4.5
2.0 6
2.5 7.5
3.0 9
3.5 12
4.0 15.5
4.5 20
5.0 24
5.5 29
6.0 35
6.5 41
7.0 47
7.5 54
Wall mounted
h0
1.8 [m]
Ceiling concealedCassetteCeiling suspended
h0 2.2 [m]h0 2.2 [m]h0 2.2 [m]
OBH790
13
PART NAMES AND FUNCTIONS
3
ACCESSORIES
Model
MXZ-2F33VF
MXZ-2F42VF
MXZ-2F53VF
MXZ-3F54VF
MXZ-3F68VF
MXZ-4F72VF
Drain socket 1 1
Drain cap - 2
Air outlet
Drain outlet
Air inlet
(Back and side)
MXZ-3F54VF
MXZ-3F68VF
MXZ-4F72VF
MXZ-2F33VF
MXZ-2F42VF
MXZ-2F53VF
MXZ-2F53VFH
Air inlet
Air outlet
Drain outlet
Piping
Drain hose
(Back and side)
OBH790
14
SPECIFICATION
4
Outdoor model MXZ-2F33VF
Outdoor unit power supply
Single phase
220 - 230 - 240 V, 50 Hz
System
Indoor units number 2
Piping total length m Max. 20
Connecting pipe length m Max. 15
Height difference (Indoor ~ Outdoor) m Refer to 8 REFRIGERANT SYSTEM DIAGRAM.
Height difference (Indoor ~ Indoor) m Refer to 8 REFRIGERANT SYSTEM DIAGRAM.
Function Cooling Heating
Capacity Rated frequency (Min.-Max.)
2 kW 3.3 (1.1 - 3.8) 4.0 (1.0 - 4.1)
Breaker capacity A 15
Electrical
data
Power input (Total) 1, 2 W 850 910
Running current (Total)
1, 2 A 4.3 - 4.1 - 3.9 4.6 - 4.4 - 4.2
Power factor (Total)
1, 2% 90
Starting current (Total)
1, 2 A 4.6
Coeffi cient of performance (C.O.P) (Total)
1, 2 3.88 4.40
Compressor
Model KVB073FYXMC
Output W 470
Current
1, 2 A 3.8
Refrigeration oil (Model) L 0.27 (FW68S)
Fan
motor
Model RC0J50-FA
Current
1, 2 A 0.35
Dimensions W x H x D mm 800 x 550 x 285
Weight kg 33
Special
remarks
Air fl ow (Rated) m3 /h 1,890 1,938
Sound level (Rated) dB(A) 49 50
Fan speed (Rated) rpm 860 880
Pre-charged refrigerant quantity (R32) kg 1.0
Max refrigerant quantity (R32) kg 1.0
1 Measured under rated operating frequency.
2 When connected with indoor units below.
MSZ-AP15VF + MSZ-LN18VG
NOTE: Test conditions are based on ISO 5151. (Refrigerant piping length (one way): 5 m)
COOLING INDOOR Dry-bulb temperature 27.0 °C Wet-bulb temperature 19.0 °C
OUTDOOR Dry-bulb temperature 35.0 °C Wet-bulb temperature 24.0 °C
HEATING INDOOR Dry-bulb temperature 20.0 °C
OUTDOOR Dry-bulb temperature 7.0 °C Wet-bulb temperature 6.0 °C
OBH790
15
Outdoor model MXZ-2F42VF
Outdoor unit power supply
Single phase
220 - 230 - 240 V, 50 Hz
System
Indoor units number 2
Piping total length m Max. 30
Connecting pipe length m Max. 20
Height difference (Indoor ~ Outdoor) m Refer to 8 REFRIGERANT SYSTEM DIAGRAM.
Height difference (Indoor ~ Indoor) m Refer to 8 REFRIGERANT SYSTEM DIAGRAM.
Function Cooling Heating
Capacity Rated frequency (Min.-Max.)
2 kW 4.2 (1.1 - 4.4) 4.5 (1.0 - 4.8)
Breaker capacity A 15
Electrical
data
Power input (Total) 1, 2 W 980 880
Running current (Total)
1, 2 A 4.9 - 4.7 - 4.5 4.4 - 4.3 - 4.1
Power factor (Total)
1, 2% 90
Starting current (Total)
1, 2 A 7.6
Coeffi cient of performance (C.O.P) (Total)
1, 2 4.29 5.11
Compressor
Model SVB130FBBMT
Output W 1,100
Current
1, 2 A 3.99
Refrigeration oil (Model) L 0.35 (FW68S)
Fan
motor
Model RC0J50-FA
Current
1, 2 A 0.35
Dimensions W x H x D mm 800 x 550 x 285
Weight kg 37
Special
remarks
Air fl ow (Rated) m3 /h 1,704 2,010
Sound level (Rated) dB(A) 44 50
Fan speed (Rated) rpm 780 910
Pre-charged refrigerant quantity (R32) kg 1.2
Max refrigerant quantity (R32) kg 1.2
1 Measured under rated operating frequency.
2 When connected with indoor units below.
MSZ-LN18VG + MSZ-LN25VG
NOTE: Test conditions are based on ISO 5151. (Refrigerant piping length (one way): 5 m)
COOLING INDOOR Dry-bulb temperature 27.0 °C Wet-bulb temperature 19.0 °C
OUTDOOR Dry-bulb temperature 35.0 °C Wet-bulb temperature 24.0 °C
HEATING INDOOR Dry-bulb temperature 20.0 °C
OUTDOOR Dry-bulb temperature 7.0 °C Wet-bulb temperature 6.0 °C
OBH790
16
Outdoor model MXZ-2F53VF MXZ-2F53VFH
Outdoor unit power supply
Single phase
220 - 230 - 240 V, 50 Hz
System
Indoor units number 2
Piping total length m Max. 30
Connecting pipe length m Max. 20
Height difference (Indoor ~ Outdoor) m Refer to 8 REFRIGERANT SYSTEM DIAGRAM.
Height difference (Indoor ~ Indoor) m Refer to 8 REFRIGERANT SYSTEM DIAGRAM.
Function Cooling Heating
Capacity Rated frequency (Min.-Max.)
2 kW 5.3 (1.1 - 5.6) 6.4 (1.0 - 7.0)
Breaker capacity A 15
Electrical
data
Power input (Total) 1, 2 W 1,400 1,560
Running current (Total)
1, 2 A 6.5 - 6.2 - 6.0 7.5 - 7.1 - 6.8
Power factor (Total)
1, 2 % 97.5 95
Starting current (Total)
1, 2 A 7.6
Coeffi cient of performance (C.O.P) (Total)
1, 2 3.79 4.10
Compressor
Model SVB130FBBMT
Output W 1,400
Current
1, 2 A 6.59
Refrigeration oil (Model) L 0.35 (FW68S)
Fan
motor
Model RC0J50-FA
Current
1, 2 A 0.35
Dimensions W x H x D mm 800 x 550 x 285
Weight kg MXZ-2F53VF: 37 MXZ-2F53VFH: 38
Special
remarks
Air fl ow (Rated) m3 /h 1,962 2,082
Sound level (Rated) dB(A) 46 51
Fan speed (Rated) rpm 890 940
Pre-charged refrigerant quantity (R32) kg 1.2
Max refrigerant quantity (R32) kg 1.2
1 Measured under rated operating frequency.
2 When connected with indoor units below.
MSZ-LN18VG + MSZ-LN35VG
NOTE: Test conditions are based on ISO 5151. (Refrigerant piping length (one way): 5 m)
COOLING INDOOR Dry-bulb temperature 27.0 °C Wet-bulb temperature 19.0 °C
OUTDOOR Dry-bulb temperature 35.0 °C Wet-bulb temperature 24.0 °C
HEATING INDOOR Dry-bulb temperature 20.0 °C
OUTDOOR Dry-bulb temperature 7.0 °C Wet-bulb temperature 6.0 °C
OBH790
17
Outdoor model MXZ-3F54VF
Outdoor unit power supply
Single phase
220 - 230 - 240 V, 50 Hz
System
Indoor units number 2 to 3
Piping total length m Max. 50
Connecting pipe length m Max. 25
Height difference (Indoor ~ Outdoor) m Refer to 8 REFRIGERANT SYSTEM DIAGRAM.
Height difference (Indoor ~ Indoor) m Refer to 8 REFRIGERANT SYSTEM DIAGRAM.
Function Cooling Heating
Capacity Rated frequency (Min.-Max.)
2 kW 5.4 (2.9 - 6.8) 7.0 (2.6 - 9.0)
Breaker capacity A 25
Electrical
data
Power input (Total) 1, 2 W 1,320 1,400
Running current (Total)
1, 2 A 6.0 - 5.7 - 5.5 6.4 - 6.1 - 5.9
Power factor (Total)
1, 2% 99
Starting current (Total)
1, 2 A 6.7
Coeffi cient of performance (C.O.P) (Total)
1, 2 4.09 5.00
Compressor
Model SVB130FBBM1T
Output W 1,400
Current
1, 2 A 5.06
Refrigeration oil (Model) L 0.6 (FW68S)
Fan
motor
Model SIC-82FX-F764-1
Current
1, 2 A 0.5
Dimensions W x H x D mm 840 x 710 x 330
Weight kg 57
Special
remarks
Air fl ow (Rated) m3 /h 1,860 1,632
Sound level (Rated) dB(A) 46 50
Fan speed (Rated) rpm 600 560
Pre-charged refrigerant quantity (R32) kg 1.4
Max refrigerant quantity (R32) kg 2.4
1 Measured under rated operating frequency.
2 When connected with indoor units below.
MSZ-LN18VG + MSZ-LN18VG + MSZ-LN18VG
NOTE: Test conditions are based on ISO 5151. (Refrigerant piping length (one way): 5 m)
COOLING INDOOR Dry-bulb temperature 27.0 °C Wet-bulb temperature 19.0 °C
OUTDOOR Dry-bulb temperature 35.0 °C Wet-bulb temperature 24.0 °C
HEATING INDOOR Dry-bulb temperature 20.0 °C
OUTDOOR Dry-bulb temperature 7.0 °C Wet-bulb temperature 6.0 °C
OBH790
18
Outdoor model MXZ-3F68VF
Outdoor unit power supply
Single phase
220 - 230 - 240 V, 50 Hz
System
Indoor units number 2 to 3
Piping total length m Max. 60
Connecting pipe length m Max. 25
Height difference (Indoor ~ Outdoor) m Refer to 8 REFRIGERANT SYSTEM DIAGRAM.
Height difference (Indoor ~ Indoor) m Refer to 8 REFRIGERANT SYSTEM DIAGRAM.
Function Cooling Heating
Capacity Rated frequency (Min.-Max.)
2 kW 6.8 (2.9 - 8.4) 8.6 (2.6 - 10.6)
Breaker capacity A 25
Electrical
data
Power input (Total) 1, 2 W 1,840 1,910
Running current (Total)
1, 2 A 8.4 - 8.0 - 7.7 8.8 - 8.4 - 8.0
Power factor (Total)
1, 2% 99
Starting current (Total)
1, 2 A 10.1
Coeffi cient of performance (C.O.P) (Total)
1, 2 3.70 4.50
Compressor
Model SVB172FCKM1T
Output W 1,800
Current
1, 2 A 8.58
Refrigeration oil (Model) L 0.6 (FW68S)
Fan
motor
Model SIC-82FX-F764-1
Current
1, 2 A 0.5
Dimensions W x H x D mm 840 x 710 x 330
Weight kg 57
Special
remarks
Air fl ow (Rated) m3 /h 2,124 2,376
Sound level (Rated) dB(A) 48 53
Fan speed (Rated) rpm 650 700
Pre-charged refrigerant quantity (R32) kg 1.4
Max refrigerant quantity (R32) kg 2.4
1 Measured under rated operating frequency.
2 When connected with indoor units below.
MSZ-LN18VG + MSZ-LN25VG + MSZ-LN25VG
NOTE: Test conditions are based on ISO 5151. (Refrigerant piping length (one way): 5 m)
COOLING INDOOR Dry-bulb temperature 27.0 °C Wet-bulb temperature 19.0 °C
OUTDOOR Dry-bulb temperature 35.0 °C Wet-bulb temperature 24.0 °C
HEATING INDOOR Dry-bulb temperature 20.0 °C
OUTDOOR Dry-bulb temperature 7.0 °C Wet-bulb temperature 6.0 °C
OBH790
19
Outdoor model MXZ-4F72VF
Outdoor unit power supply
Single phase
220 - 230 - 240 V, 50 Hz
System
Indoor units number 2 to 4
Piping total length m Max. 60
Connecting pipe length m Max. 25
Height difference (Indoor ~ Outdoor) m Refer to 8 REFRIGERANT SYSTEM DIAGRAM.
Height difference (Indoor ~ Indoor) m Refer to 8 REFRIGERANT SYSTEM DIAGRAM.
Function Cooling Heating
Capacity Rated frequency (Min.-Max.)
2 kW 7.2 (3.7 - 8.8) 8.6 (3.4 - 10.7)
Breaker capacity A 25
Electrical
data
Power input (Total) 1, 2 W 1,850 1,870
Running current (Total)
1, 2 A 8.5 - 8.1 - 7.8 8.6 - 8.2 - 7.9
Power factor (Total)
1, 2% 99
Starting current (Total)
1, 2 A 10.1
Coeffi cient of performance (C.O.P) (Total)
1, 2 3.89 4.60
Compressor
Model SVB172FCKM1T
Output W 2,000
Current
1, 2 A 6.98
Refrigeration oil (Model) L 0.6 (FW68S)
Fan
motor
Model SIC-82FX-F764-1
Current
1, 2 A 0.5
Dimensions W x H x D mm 840 x 710 x 330
Weight kg 58
Special
remarks
Air fl ow (Rated) m3 /h 2,124 2,562
Sound level (Rated) dB(A) 48 54
Fan speed (Rated) rpm 650 740
Pre-charged refrigerant quantity (R32) kg 1.4
Max refrigerant quantity (R32) kg 2.4
1 Measured under rated operating frequency.
2 When connected with indoor units below.
MSZ-LN18VG + MSZ-LN18VG + MSZ-LN18VG + MSZ-LN18VG
NOTE: Test conditions are based on ISO 5151. (Refrigerant piping length (one way): 5 m)
COOLING INDOOR Dry-bulb temperature 27.0 °C Wet-bulb temperature 19.0 °C
OUTDOOR Dry-bulb temperature 35.0 °C Wet-bulb temperature 24.0 °C
HEATING INDOOR Dry-bulb temperature 20.0 °C
OUTDOOR Dry-bulb temperature 7.0 °C Wet-bulb temperature 6.0 °C
OBH790
20
NOISE CRITERIA CURVES
5
90
80
70
60
50
40
30
20
10
63 125 250 500 1000 2000 4000 8000
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
CoolingHigh
FUNCTION
FAN SPEED
HeatingHigh
44
SPL(dB(A))50LINE
90
80
70
60
50
40
30
20
10
63 125 250 500 1000 2000 4000 8000
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
CoolingHigh
FUNCTION
FAN SPEED
HeatingHigh
49
SPL(dB(A))50LINE
90
80
70
60
50
40
30
20
10
63 125 250 500 1000 2000 4000 8000
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
CoolingHigh
FUNCTION
FAN SPEED
HeatingHigh
46
SPL(dB(A))51LINE
MXZ-2F53VF
MXZ-2F53VFH
MXZ-2F33VF MXZ-2F42VF
OBH790
21
OUTDOOR UNIT
MICROPHONE
1m
Test conditions
Cooling :Dry-bulb temperature 35.0°C Wet-bulb temperature 24.0°C
Heating :Dry-bulb temperature 7.0°C Wet-bulb temperature 6.0°C
90
80
70
60
50
40
30
20
10
63 125 250 500 1000 2000 4000 8000
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
CoolingHigh
FUNCTION
FAN SPEED
HeatingHigh
46
SPL(dB(A))50LINE
90
80
70
60
50
40
30
20
10
63 125 250 500 1000 2000 4000 8000
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
CoolingHigh
FUNCTION
FAN SPEED
HeatingHigh
48
SPL(dB(A))53LINE
90
80
70
60
50
40
30
20
10
63 125 250 500 1000 2000 4000 8000
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
CoolingHigh
FUNCTION
FAN SPEED
HeatingHigh
48
SPL(dB(A))54LINE
MXZ-3F54VF MXZ-3F68VF
MXZ-4F72VF
OBH790
22
OUTLINES AND DIMENSIONS
6
MXZ-2F33VF MXZ-2F42VF MXZ-2F53VF MXZ-2F53VFH
Unit: mm
OBH790
23
1.Installation space
Note : Leave front and both sides
free of obstruction.
Note : Leave rear, overhead and
both sides free of obstruction.
500 or more
100 or more
Note : Leave front and overhead
free of obstruction.
100 or more
350 or more
200 or more
500 or more
2.Service space
100 or more
500 or more
350 or more
350 or more
100 or more
Service space
MXZ-3F54VF MXZ-3F68VF
Unit: mm
OBH790
24
1.Installation space
Note : Leave front and both sides
free of obstruction.
Note : Leave rear, overhead and
both sides free of obstruction.
500 or more
100 or more
Note : Leave front and overhead
free of obstruction.
100 or more
350 or more
200 or more
500 or more
2.Service space
100 or more
500 or more
350 or more
350 or more
100 or more
Service space
MXZ-4F72VF
Unit: mm
OBH790
25
WIRING DIAGRAM
7
MXZ-2F33VF -
E1
,
ET1
MXZ-2F42VF -E1,
ET1
MXZ-2F53VF -
E1, ET1
OBH790
26
MXZ-2F53VFH -
E1
OBH790
27
MXZ-3F54VF -E1,
ET1
MXZ-3F68VF -E1,
ET1
OBH790
28
MXZ-4F72VF -E1,
ET1
OBH790
29
REFRIGERANT SYSTEM DIAGRAM
8
a
b
Outdoor
unit
Indoor
units
10 m
10 m
10 m
Max.
Height
difference
Stop valve
(with strainer #100)
LEV A
LEV B
Compressor
Defrost
thermistor
RT61
Muffler
4-way valve
Indoor unit
A
Indoor unit
B
Indoor unit
A
Indoor unit
B
Capillary tube
Capillary tube
Strainer
#100
Stop valve
(with strainer #100)
R.V. coil
OFF
ON
Refrigerant flow in cooling
Refrigerant flow in heating
Ambient
temperature
thermistor
RT65
Outdoor heat
exchanger
temperature
thermistor
RT68
FAN-OUT
HEX-OUT
Discharge
temperature
thermistor RT62
Stop valve
(with service port)
Stop valve
(with service port)
Sub muffler
UNIT: mm
MXZ-2F33VF
UNIT: mm (inch)
Outdoor unit union diameter
For
Indoor unit A
Liquid 6.35(1/4)
Gas 9.52(3/8)
Indoor unit B
Liquid 6.35(1/4)
Gas 9.52(3/8)
MAX REFRIGERANT PIPING LENGTH
Piping length each indoor unit (a, b) 15 m
Total piping length (a+b) 20 m
Bending point for each unit 15
Total bending point 20
It is irrelevant which unit is higher.
ADDITIONAL REFRIGERANT CHARGE
Outdoor unit
precharged
(g)
Refrigerant piping length (one way, 2 unit total)
20 m
1,000 0
Refrigerant pipe diameter is different according to indoor unit to be
connected. When using extension pipes, refer to the right table. .
OBH790
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