Mitsubishi Electronics R410A Contents, Confirmation of parts attached, Safety precautions

Contents

1.	Safety precautions	2	5.	Drainage piping work	............................................................................... 8
2.	Installation location	3	6.	Electrical work	8
3.	Installing the outdoor unit	5	7.	Test run	11
4.	Installing the refrigerant piping	5

Confirmation of parts attached

In addition to this manual, the following parts are supplied with the outdoor unit.

They are used for grounding the S terminals of transmission terminal blocks TB3,

TB7. For details refer to “6. Electrical work”.

			Grounding lead wire (⋅ 2)
1. Safety precautions
	After installation work has been completed, explain the “Safety Precautions”, use,
s Before installing the unit, make sure you read all the “Safety precau-
	and maintenance of the unit to the customer according to the information in the Op-
tions”.
s Please report to or take consent by the supply authority before connec-	eration Manual and perform the test run to ensure normal operation. Both the Instal-
tion to the system.	lation Manual and Operation Manual must be given to the user for keeping. These
	manuals must be passed on to subsequent users.
Warning:
Describes precautions that must be observed to prevent danger of injury or			: Indicates a part which must be grounded.
death to the user.
Caution:			Warning:
Describes precautions that must be observed to prevent damage to the unit.	Carefully read the labels affixed to the main unit.
Warning:
• The unit must not be installed by the user. Ask a dealer or an authorized	• Use C1220 copper phosphorus, for copper and copper alloy seamless pipes,
technician to install the unit. If the unit is installed incorrectly, water leakage,		to connect the refrigerant pipes. If the pipes are not connected correctly, the
electric shock, or fire may result.		unit will not be properly grounded and electric shock may result.
• For installation work, follow the instructions in the Installation Manual and use	• Use only specified cables for wiring.The connections must be made securely
tools and pipe components specifically made for use with R410A refrigerant.		without tension on the terminals. If the cables are connected or installed in-
The R410A refrigerant in the HFC system is pressurized 1.6 times the pressure		correctly, overheating or fire may result.
of usual refrigerants. If pipe components not designed for R410A refrigerant	• The terminal block cover panel of the outdoor unit must be firmly attached. If
are used and the unit is not installed correctly, the pipes may burst and cause		the cover panel is mounted incorrectly and dust and moisture enter the unit,
damage or injuries. In addition, water leakage, electric shock, or fire may result.		electric shock or fire may result.
• The unit must be installed according to the instructions in order to minimize	• When installing or moving the air conditioner, use only the specified refriger-
the risk of damage from earthquakes, typhoons, or strong winds. An incor-		ant (R410A) to charge the refrigerant lines. Do not mix it with any other refrig-
rectly installed unit may fall down and cause damage or injuries.		erant and do not allow air to remain in the lines. Air enclosed in the lines can
• The unit must be securely installed on a structure that can sustain its weight.		cause pressure peaks resulting in a rupture and other hazards.
If the unit is mounted on an unstable structure, it may fall down and cause	• Use only accessories authorized by Mitsubishi Electric and ask a dealer or
damage or injuries.		an authorized technician to install them. If accessories are incorrectly in-
• If the air conditioner is installed in a small room, measures must be taken to		stalled, water leakage, electric shock, or fire may result.
prevent the refrigerant concentration in the room from exceeding the safety	• Do not alter the unit. Consult a dealer for repairs. If alterations or repairs are
limit in the event of refrigerant leakage. Consult a dealer regarding the appro-		not performed correctly, water leakage, electric shock, or fire may result.
priate measures to prevent the allowable concentration from being exceeded.	• The user should never attempt to repair the unit or transfer it to another loca-
Should the refrigerant leak and cause the concentration limit to be exceeded,		tion. If the unit is installed incorrectly, water leakage, electric shock, or fire
hazards due to lack of oxygen in the room may result.		may result. If the air conditioner must be repaired or moved, ask a dealer or
• Ventilate the room if refrigerant leaks during operation. If refrigerant comes		an authorized technician.
into contact with a flame, poisonous gases will be released.	• After installation has been completed, check for refrigerant leaks. If refriger-
• All electric work must be performed by a qualified technician according to		ant leaks into the room and comes into contact with the flame of a heater or
local regulations and the instructions given in this manual.The units must be		portable cooking range, poisonous gases will be released.
powered by dedicated power lines and the correct voltage and circuit break-
ers must be used. Power lines with insufficient capacity or incorrect electri-
cal work may result in electric shock or fire.

1.1.Before installation

Caution:

•Do not use the unit in an unusual environment. If the air conditioner is in- stalled in areas exposed to steam, volatile oil (including machine oil), or sulfuric gas, areas exposed to high salt content such as the seaside, or areas where the unit will be covered by snow, the performance can be significantly re- duced and the internal parts can be damaged.

•Do not install the unit where combustible gases may leak, be produced, flow, or accumulate. If combustible gas accumulates around the unit, fire or explo- sion may result.

•The outdoor unit produces condensation during the heating operation. Make sure to provide drainage around the outdoor unit if such condensation is likely to cause damage.

•When installing the unit in a hospital or communications office, be prepared for noise and electronic interference. Inverters, home appliances, high-fre- quency medical equipment, and radio communications equipment can cause the air conditioner to malfunction or breakdown.The air conditioner may also affect medical equipment, disturbing medical care, and communications equip- ment, harming the screen display quality.

1.2. Before installation (relocation)

Caution:

•Be extremely careful when transporting the units. Two or more persons are needed to handle the unit, as it weighs 20 kg [44 lbs] or more. Do not grasp the packaging bands. Wear protective gloves to remove the unit from the packag- ing and to move it, as you can injure your hands on the fins or other parts.

•Be sure to safely dispose of the packaging materials. Packaging materials, such as nails and other metal or wooden parts may cause stabs or other injuries.

•The base and attachments of the outdoor unit must be periodically checked for looseness, cracks or other damage. If such defects are left uncorrected, the unit may fall down and cause damage or injuries.

•Do not clean the air conditioner unit with water. Electric shock may result.

•Tighten all flare nuts to specification using a torque wrench. If tightened too much, the flare nut can break after an extended period and refrigerant can leak out.

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