Mitsubishi Electric DXK09ZJ-S Technical Manual page 40

additionally.
• For an installation measuring 15m or shorter in pipe length, please charge the refrigerant volume charged
for shipment at the factory, when you recharge refrigerant after servicing etc.
8) Heating and condensation prevention
(1) Dress refrigerant pipes (both gas and liquid pipes) for heat insulation and prevention of dew condensation.
• Improper heat insulation/anti-dew dressing can result in a water leak or dripping causing damage to household effects, etc.
(2) Use a heat insulating material that can withstand 120 C or a higher temperature. Poor heat insulating capacity can cause heat insulation problems or cable
deterioration.
• All gas pipes must be securely heat insulated in order to prevent damage from dripping water that comes from the condensation formed on them during a cooling
operation or personal injury from burns because their surface can reach quite a high temperature due to discharged gas flowing inside during a heating operation.
• Wrap indoor units' flare joints with heat insulating parts (pipe cover) for heat insulation (both gas and liquid pipes).
• Give heat insulation to both gas and liquid side pipes. Bundle a heat insulating material and a pipe tightly together so that no gaps may be left between them and
wrap them together with a connecting cable by a dressing tape.
• Both gas and liquid pipes need to be dressed with 20mm or thicker heat insulation materials above the ceiling where relative humidity exceeds 70%.
3. DRAIN PIPING WORK
• Execute drain piping by using a drain elbow and drain
grommets supplied separately as optional parts, where
water drained from the outdoor unit is a problem.
• Water may drip where there is a larger amount of drain
water. Seal around the drain elbow and drain
grommets with putty or adequate caulking material.
• Condensed water may flow out from vicinity of
operation valve or connected pipes.
• Where you are likely to have several days of sub-zero
temperatures in a row, do not use a drain elbow and
drain grommets. (There is a risk of drain water freezing
inside and blocking the drain.)
4. ELECTRICAL WIRING WORK
Electrical installation work must be performed by an electrical installation service provider qualified by a power provider of the country.
Electrical installation work must be executed according to the technical standards and other regulations applicable to electrical installations in the country.
• Do not use any supply cord lighter than one specified in parentheses for each type below.
• braided cord (code designation 60245 IEC 51)
• ordinary tough rubber sheathed cord (code designation 60245 IEC 53)
• flat twin tinsel cord (code designation 60227 IEC 41)
Use polychloroprene sheathed flexible cord (code designation 60245 IEC57) for supply cords of parts of appliances for outdoor use.
• Ground the unit. Do not connect the grounding wire to a gas pipe, water pipe, lightning rod or telephone grounding wire.
If improperly grounded, an electric shock or malfunction may result.
• A grounding wire must be connected before connecting the power cable. Provide a grounding wire longer than the power cable.
• The installation of an impulse withstanding type earth leakage breaker is necessary. A failure to install an earth leakage breaker can result in an accident
such as an electric shock or a fire.
• Do not turn on the power until the electrical work is completed.
• Do not use a condensive capacitor for power factor improvement under any circumstances. (It dose not improve power factor, while it can cause an
abnormal overheat accident)
• For power supply cables, use conduits.
• Do not lay electronic control cables (remote control and signaling wires) and other cables together outside the unit. Laying them together can result in
the malfunctioning or a failure of the unit due to electric noises.
• Fasten cables so that may not touch the piping, etc.
• When cables are connected, make sure that all electrical components within the electrical component box are free of loose connector coupling or
terminal connection and then attach the cover securely. (Improper cover attachment can result in malfunctioning or a failure of the unit, if water
penetrates into the box.)
• Never use a shield cable.
Power supply terminal block
Model 09, 12
CAUTION
Do not put a grommet on
this hole.
This is a supplementary
drain hole to discharge
drain water, when a large
quantity of it is gathered.
Drain elbow
Drain hose
Grommet (To be procured on the installer's part)
For details of electrical cabling, refer to the indoor unit installation manual.
Power cable, indoor - outdoor connecting wire circuit diagram
Model 09, 12
NOTE Put down the refrigerant volume calculated from the pipe length onto the caution label attached
on the service panel.
Wires for connecting indoor
and outdoor units
Model 18
• When condensed water needs to be led to a drain, etc., install
the unit on a flat base (supplied separately as an optional part)
or concrete blocks.
Then, please secure space for the drain elbow and the drain
hose.
Drain elbow
Drain hose
Grommet (To be procured on the installer's part)
In case of faulty wiring connection, the indoor unit stops,
and then the run lamp turns on and the timer lamp blinks.
Use cables for interconnection wiring to avoid loosening of the wires.
CENELEC code for cables Required field cables.
H05RNR4G1.5 (Example) or 245IEC57
H Harmonized cable type
05 300/500 volts
R Natural-and/or synth. rubber wire insulation
N Polychloroprene rubber conductors insulation
R Stranded core
4or5 Number of conductors
G One conductor of the cable is the earth conductor
(yellow/green)
1.5 Section of copper wire (mm
Model 18
Band (accessory)
Pipe cover (accessory)
Exterior tape
Gas piping
Liquid piping
Insulation
Clearance
CAUTION
)
2
INSTALLAT
Check the following point
Explain to the customer h
After installation
Power cables and
The power supply
The drain hose is f
Operation valve is
No gas leaks from