Mitsubishi Electric MXZ-3B24NA Notice D'installation page 2

Required Tools for Installation
Phillips screwdriver 4 mm (5/32 in.) hexagonal
Level wrench
Scale Flare tool for RA10A
Utility knife or scissors Gauge manifold for R410A
Torque wrench Vacuum pump for R410A
Wrench (or spanner) Charge hose for R410A
Pipe cutter with reamer
1. BEFORE INSTALLATION
1-1. THE FOLLOWING SHOULD ALWAYS BE OBSERVED FOR SAFETY
* Be sure to read "THE FOLLOWING SHOULD ALWAYS BE OBSERVED FOR SAFETY" before installing the air conditioner.
* Be sure to observe the warnings and cautions specified here as they include important items related to safety.
* After reading this manual, be sure to keep it together with the OPERATING INSTRUCTIONS for future reference.
PNT ite)
. BEFORE INSTALLATION
OUTDOOR UNIT INSTALLATION
. FLARING WORK AND PIPE CONNECTION... cccccetetriees
. PURGING PROCEDURES, LEAK TEST, AND TEST RUN..
. RELOCATION AND MAINTENANCE ou... ccc ceeeteereneriens
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(Could lead to death, serious Injury, etc.)
Do not install the unit by yourself (user).
Incomplete installation could cause fire or electric shock, injury due to the unit
falling, or leakage of water. Consult the dealer from whom you purchased the
unit or a qualified installer.
@ Perform the installation securely referring to the installation manual.
Incomplete installation could cause fire or electric shock, injury due to the unit
falling, or leakage of water.
& When installing the unit, use appropriate protective equipment and tools
for safety.
Failure to do so could cause injury.
& Install the unit securely in a place which can bear the weight of the unit.
If the installation location cannot bear the weight of the unit, the unit could fall
causing injury.
& Perform electrical work according to the installation manual and be sure
to use an exclusive circuit. Do not connect other electrical appliances to
the circuit.
If the capacity of the power circuit is insufficient or there is incomplete electri-
cal work, it could result in a fire or an electric shock.
Do not damage the wires by applying excessive pressure with parts or
screws.
Damaged wires could cause fire.
@ Be sure to cut off the main power in case of setting up the indoor P.C.
board or wiring works.
Failure to do so could cause electric shock.
Use the specified wires to connect the indoor and outdoor units secure-
ly and attach the wires firmly to the terminal block connecting sections
so the stress of the wires is not applied to the sections.
Incomplete connecting and securing could cause fire.
@ Do not install the unit in a place where inflammable gas may leak.
If gas leaks and accumulates in the area around the unit, it could cause an
explosion.
& Do not use intermediate connection of the power cord or the extension
cord and do not connect many devices to one AC outlet.
It could cause a fire or an electric shock due to defective contact, defective
insulation, exceeding the permissible current, etc.
@ Be sure to use the parts provided or specified parts for the installation
work,
The use of defective parts could cause an injury or leakage of water due to a
fire, an electric shock, the unit falling, etc.
@ When plugging the power supply plug into the outlet, make sure that there
is no dust, clogging, or loose parts in both the outlet and the plug. Make
sure that the power supply plug is pushed completely into the outlet.
If there is dust, clogging, or loose parts on the power supply plug or the outlet,
it could cause electric shock or fire. If loose parts are found on the power sup-
ply plug, replace it.
PU or Uy gle)
@ Depending on the installation area, install a Ground Fault Interrupt (GFI)
circuit breaker.
If the Ground Fault Interrupt (GFI) circuit breaker is not installed, an electric
shock could occur.
@ Perform the drainage/piping work securely according to the installation
manual.
If there is defect in the drainage/piping work, water could drop from the unit,
soaking and damaging household goods.
Use appropriate tools and piping materials for installation.
& When pumping down the refrigerant, stop the compressor before dis-
@ When installing the unit, securely connect the refrigerant pipes before
@ Fasten a flare nut with a torque wrench as specified in this manual.
@ The unit shall be installed in accordance with national wiring regula-
@ Ground the unit correctly.
(Could lead to serious injury in particular environments when operated incorrectly.)
@ Do not touch the air inlet or the aluminum fins of the outdoor unit.
@ Do not install the outdoor unit where small animals may live.
@ Attach the electrical cover to the indoor unit and the service panel to
the outdoor unit securely.
lf the electrical cover of the indoor unit and/or the service panel of the out-
door unit are not attached securely, it could result in a fire or an electric
shock due to dust, water, etc.
@ When installing, relocating, or servicing the unit, make sure that no
substance other than the specified refrigerant (R410A) enters the re-
frigerant circuit.
Any presence of foreign substance such as air can cause abnormal pres-
sure rise and may result in explosion or injury. The use of any refrigerant
other than that specified for the system will cause mechanical failure, sys-
tem malfunction, or unit breakdown. In the worst case, this could lead to a
serious impediment to securing product safety.
@ Do not discharge the refrigerant into the atmosphere. If refrigerant
leaks during installation, ventilate the room.
If refrigerant comes in contact with a fire, harmful gas could be generated. Re-
frigerant leakage may cause suffocation. Ventilate the room.
@ Check that the refrigerant gas does not leak after installation has been
completed.
lf refrigerant gas leaks indoors, and comes into contact with the flame of a
fan heater, space heater, stove, etc., harmful substances will be generated.
The pressure of R410A is 1.6 times more than R22. Not using appropriate
tools or materials and incomplete installation could cause the pipes to burst
or injury.
connecting the refrigerant pipes.
lf the refrigerant pipes are disconnected while the compressor is running
and the stop valve is open, air could be drawn in and the pressure in the re-
frigeration cycle could become abnormally high. This could cause the pipes
to burst or injury.
starting the compressor.
lf the compressor is started before the refrigerant pipes are connected and
when the stop valve is open, air could be drawn in and the pressure in the
refrigeration cycle could become abnormally high. This could cause the
pipes to burst or injury.
lf fastened too tight, a flare nut may break after a long period and cause re-
frigerant leakage.
tions.
Do not connect the ground to a gas pipe, water pipe, lightning rod or tel-
ephone ground. Defective grounding could cause electric shock.
This could cause injury.
If small animals enter and touch the electric parts inside the unit, it could
cause a malfunction, smoke emission, or fire. Also, advise user to keep the
area around the unit clean.
1-2. SPECIFICATIONS
Power supply Pipe length and height difference *1, *2, *3, "4, *5, *6
Model Rated Voltage | Frequency Max. pipe length per indoor Max. height difference *7 Max. no. of bends per in- Refrigerant adjustment A
unit / for multi-system door unit / for multi system 8
MXZ-3B24NA
MXZ-3B30NA 208 / 230 V 60 Hz 25 m (82 ft) / 70 m (230 ft) 15 m (49 ft) 25/70 20 g/m (1.08 oz each 5 ft)
MXZ-4B36NA
*4 Never use pipes with thickness less than specified. The pressure resist-
ance will be insufficient.
*2 Use a copper pipe or a copper-alloy seamless pipe.
*3 Be careful not to crush or bend the pipe during pipe bending.
*4 Refrigerant pipe bending radius must be 100 mm (4 in.) or more.
*5 Insulation material : Heat resisting foam plastic 0.045 specific gravity
*6 Be sure to use the insulation of specified thickness. Excessive thickness
may cause incorrect installation of the indoor unit and insufficient thickness
may cause dew drippage.
En-1
*7 If the outdoor unit is installed higher than the indoor unit, max. height differ-
ence is reduced to 10 m (33 ft).
*8 If pipe length exceeds 40 m (1371 ft), additional refrigerant (R410A) charge
is required. (No additional charge is required for pipe length less than
40 m (131 ft).)
Additional refrigerant (m) = A * (pipe length (m) — 40)
Additional refrigerant (ft) = A x P i p e len * ft) — 131