MXZ-SM42NAMHZ Installation Manual

1
Contents
1. Safety precautions
► Before installing the unit, make sure you read all the “Safety precautions”.
► Please report to or take consent by the supply authority before connec-
tion to the system.
After installation work has been completed, explain the “Safety Precautions” use,
and maintenance of the unit to the customer according to the information in the
Operation Manual and perform the test run to ensure normal operation. Both the
Installation Manual and Operation Manual must be given to the user for keeping.
These manuals must be passed on to subsequent users.
: Indicates a part which must be grounded.
Warning:
Carefully read the labels afxed to the main unit.
Warning:
• The unit must not be installed by the user. Ask a dealer or an authorized
technician to install the unit. If the unit is installed incorrectly, water leakage,
electric shock, or re may result.
• For installation work, follow the instructions in the Installation Manual and use
tools and pipe components specically made for use with R410A refrigerant.
• The R410A refrigerant in the HFC system is pressurized 1.6 times the pres-
sure of usual refrigerants. If pipe components not designed for R410A refrig-
erant are used and the unit is not installed correctly, the pipes may burst and
cause damage or injuries. In addition, water leakage, electric shock, or re
may result.
• When installing the unit, use appropriate protective equipment and tools for
safety. Failure to do so could cause injuries.
• The unit must be installed according to the instructions in order to minimize
the risk of damage from earthquakes, typhoons, or strong winds. An incor-
rectly installed unit may fall down and cause damage or injuries.
•
The unit must be securely installed on a structure that can sustain its weight.
If the unit is mounted on an unstable structure, it may fall down and cause
damage or injuries.
•
If the air conditioner is installed in a small room, measures must be taken to
prevent the refrigerant concentration in the room from exceeding the safety limit
in the event of refrigerant leakage. Consult a dealer regarding the appropriate
measures to prevent the allowable concentration from being exceeded.
Should the refrigerant leak and cause the concentration limit to be exceeded,
hazards due to lack of oxygen in the room may result.
• Ventilate the room if refrigerant leaks during operation. If refrigerant comes
into contact with a ame, poisonous gases will be released.
• All electric work must be performed by a qualied technician according to
local regulations and the instructions given in this manual. The units must
be powered by dedicated power lines and the correct voltage and circuit
breakers must be used. Power lines with insufcient capacity or incorrect
electrical work may result in electric shock or re.
• Be sure to connect the power supply cords and the connecting wires for
the indoor units, outdoor units, and branch boxes directly to the units (no
intermediate connections).
Intermediate connections can lead to communication errors if water enters
the cords or wires and causes insufcient insulation to ground or a poor
electrical contact at the intermediate connection point.
• Use C1220 copper phosphorus, for copper and copper alloy seamless pipes,
to connect the refrigerant pipes. If the pipes are not connected correctly, the
unit will not be properly grounded and electric shock may result.
• Use only specied cables for wiring. The wiring connections must be made
securely with no tension applied on the terminal connections. Also, never
splice the cables for wiring (unless otherwise indicated in this document).
Failure to observe these instructions may result in overheating or a re.
• The terminal block cover panel of the outdoor unit must be rmly attached. If
the cover panel is mounted incorrectly and dust and moisture enter the unit,
electric shock or re may result.
• When installing or relocating, or servicing the outdoor unit, use only the
specied refrigerant (R410A) to charge the refrigerant 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 pres-
sure in the refrigerant line, and may result in an explosion and other hazards.
The use of any refrigerant other than that specied for the system will cause
mechanical failure or system malfunction or unit breakdown. In the worst
case, this could lead to a serious impediment to securing product safety.
• Do not perform pump down work when there is a gas leak. The intake of air
or other gases causes abnormally high pressure in the refrigeration cycle,
which may cause explosion or injury.
• Use only authorized accessories and ask a dealer or an authorized techni-
cian to install them. If accessories are incorrectly installed, water leakage,
electric shock, or re may result.
• Do not alter the unit. Consult a dealer for repairs. If alterations or repairs are not
performed correctly, water leakage, electric shock, or re may result.
•
The user should never attempt to repair the unit or transfer it to another location.
If the unit is installed incorrectly, water leakage, electric shock, or re may
result. If the air conditioner must be repaired or moved, ask a dealer or an
authorized technician.
• After installation has been completed, check for refrigerant leaks. If refriger-
ant leaks into the room and comes into contact with the ame of a heater or
portable cooking range, poisonous gases will be released.
• When opening or closing the valve below freezing temperatures, refrigerant
may spurt out from the gap between the valve stem and the valve body,
resulting in injuries.
Warning:
Describes precautions that must be observed to prevent danger of injury or
death to the user.
Caution:
Describes precautions that must be observed to prevent damage to the unit.
Conrmation of parts attached
In addition to this manual, the following part is supplied with the outdoor unit.
It is used for grounding the S terminal of transmission terminal block TB7.
For detail refers to “6. Electrical work”.
Grounding lead wire
1. Safety precautions ................................................ 1
2. Installation location ............................................... 3
3. Installing the outdoor unit .......................................... 6
4. Installing the refrigerant piping ...................................... 6
5. Drainage piping work ............................................. 12
6. Electrical work .................................................. 13
7. Test run ....................................................... 20
8. Special Functions ............................................... 21
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