Mitsubishi Electronics MXZ-2A20NA Before Installation, Required Tools for Installation

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.

WARNING (Could lead to death, serious injury, etc.)

nDo 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.

nPerform 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.

nInstall 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.

nPerform 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.

If the capacity of the power circuit is insufficient or there is incomplete electrical work, it could result in a fire or an electric shock.

nDo not damage the wires by applying excessive pressure with parts or screws.

Damaged wires could cause fire.

nBe 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.

nUse 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.

nDo 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.

nDo 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.

nBe 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.

nWhen 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.

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 supply plug, replace it.

nAttach 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.

nWhen installing or relocating the unit, make sure that no sub- stance other than the specified refrigerant (R410A) enters the refrigerant circuit.

Any presence of foreign substance such as air can cause abnormal pressure rise or an explosion.

nDo 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 gener- ated.

nCheck that the refrigerant gas does not leak after installation has been completed.

If refrigerant gas leaks indoors, and comes into contact with the flame of a fan heater, space heater, stove, etc., harmful substances will be generated.

nUse 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.

nWhen pumping down the refrigerant, stop the compressor before disconnecting the refrigerant pipes.

If 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.

nWhen 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.

nFasten 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.

nThe unit shall be installed in accordance with national wiring regu- lations.

nGround 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.

CAUTION (Could lead to serious injury in particular environments when operated incorrectly.)

nInstall an ground leakage breaker depending on the installation place.

If an ground leakage breaker is not installed, it could cause electric shock.

nPerform the drainage/piping work securely according to the installa- tion manual.

If there is defect in the drainage/piping work, water could drop from the unit, soaking and damaging household goods.

nDo not touch the air inlet or the aluminum fins of the outdoor unit.

This could cause injury.

nDo 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	Gauge manifold for R410A
Level	Wrench (or spanner)	Vacuum pump for R410A
Scale	4 mm (5/32 in.) hexagonal wrench	Charge hose for R410A
Utility knife or scissors	Flare tool for R410A	Pipe cutter with reamer

1-3. SPECIFICATIONS

Model	Power supply			Pipe length and height difference *2, *3, *4, *8
	Rated	Frequency	Max. pipe length per indoor	Max.	Max. no. of bends per in-	Refrigerant adjustment A
	Voltage		unit / for multi-system	height difference	door unit / for multi system	*5
MXZ-2A20NA	208/	60 Hz	25 m (82 ft) / 50 m (164 ft)	15 m (49 ft)	25 / 70	20 g/m (1.06 oz each 5 ft)
	230 V

*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 × (pipe length (ft) - 131)

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*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).

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5/9/2008 2:23:41 PM