Before Installation - Mitsubishi Electric MXZ-2B20NA Installation Manual

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.
A WARNING (Could lead to death, serious injury, etc.)
Deo 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 pur-
chased 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 appli-
ances to the circuit.
lf the capacity of the power circuit is insufficient or there is incomplete
electrical 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 se-
curely 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 exten-
sion cord and do not connect many devices to one AC outlet.
It could cause a fire or an electric shock due to defective contact, defec-
tive insulation, exceeding the permissible current, etc.
—@ Be sure to use the parts provided or specified parts for the installa-
tion 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 complete-
ly into the outlet.
lf 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 supply plug, replace it.
A CAUTION
@ Ground the unit correctly.
Do not connect the ground to a gas pipe, water pipe, lightning rod or
telephone ground. Defective grounding could cause electric shock.
@ Install an ground leakage breaker depending on the installation place.
lf an ground leakage breaker is not installed, it could cause electric shock.
@ Perform the drainage/piping work securely according to the installa-
tion manual.
lf there is defect in the drainage/piping work, water could drop from the
unit, soaking and damaging household goods.
(Could lead to serious injury in particular environments when operated incorrectly.)
@ Attach the electrical cover to the indoor unit and the service panel
to the outdoor unit securely.
If the electrical cover of the indoor unit and/or the service panel of the
outdoor 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 refrigerant circuit.
Any presence of foreign substance such as air can cause abnormal
pressure rise and may result in explosion or injury. The use of any re-
frigerant other than that specified for the system will cause mechanical
failure, system 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.
lf refrigerant comes in contact with a fire, harmful gas could be gener-
ated.
@ 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.
@ Use appropriate tools and piping materials for installation.
The pressure of R410A is 1.6 times more than R22. Not using appropri-
ate tools or materials and incomplete installation could cause the pipes
to burst or injury.
@ When pumping down the refrigerant, stop the compressor before
disconnecting the refrigerant pipes.
lf the refrigerant pipes are disconnected while the compressor is run-
ning and 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.
@ When installing the unit, securely connect the refrigerant pipes
before starting the compressor.
If the compressor is started before the refrigerant pipes are connected
and when the stop valve is open, air could be drawn in and the pres-
sure in the refrigeration cycle could become abnormally high. This
could cause the pipes to burst or injury.
@ Fasten a flare nut with a torque wrench as specified in this
manual.
If fastened too tight, a flare nut may break after a long period and cause
refrigerant leakage.
@ The unit shall be installed in accordance with national wiring regu-
lations.
@ Do not touch the air inlet or the aluminum fins of the outdoor
unit.
This could cause injury.
@ Do not install the outdoor unit where small animals may live.
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. REQUIRED TOOLS FOR INSTALLATION
Phillips screwdriver Torque wrench
Level Wrench (or spanner)
Scale
Utility knife or scissors
1-3. SPECIFICATIONS
Flare tool for R410A
4 mm (5/32 in.) hexagonal wrench
Gauge manifold for R410A
Vacuum pump for R410A
Charge hose for R410A
Pipe cutter with reamer
Power supply Pipe length and height difference *2, *3, *4, *8
Model Rated Frequenc Max. pipe length per indoor Max. Max. no. of bends per in- | Refrigerant adjustment A
Voltage 4 y unit / for multi-system height difference door unit / for multi system *5
MXZ-2B20NA Soy 60 Hz 25 m (82 ft) / 50 m (164 ft) 15 m (49 ft) 25/50 20 g/m (1.08 oz each 5 ft)
*1 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 If pipe length exceeds 40 m (131 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 4 b i p e len + f t ) = 131
*6 Insulation material : Heat resisting foam plastic 0.045 specific gravity
*7 Be sure to use the insulation of specified thickness. Excessive thickness
may cause incorrect installation of the indoor unit and insufficient thick-
ness may cause dew drippage.
*8 If the outdoor unit is installed higher than the indoor unit, max. height
difference is reduced to 10 m (33 ft).