Electric Wiring Work Instruction - Mitsubishi Heavy Industries KX6 series Service Manual

5.2 Electrlc wiring work instruction

ELECTRIC WIRING WORK INSTRUCTION

Electrical wiring work must be performed by an electrician qualified by a local power provider according
to the electrical installation technical standards and interior wiring regulations applicable to the
installation site.
Security instructions
● Accord with following items. Otherwise, there will be the risks of electric shock and fire
caused by overheating or short circuit.
● Be sure to have the electrical wiring work done by qualified electrical
installer, and use exclusive circuit.
Power source with insufficient capacity and improper work can cause electric shock and fire.
●Use specified wire for electrical wiring, fasten the wiring to the terminal
securely, and hold the cable securely in order not to apply unexpected
stress on the terminal.
Loose connections or hold could result in abnormal heat generation or fire.
●Arrange the electrical wires in the control box properly to prevent them from
rising. Fit the lid of the services panel property.
Improper fitting may cause abnormal heat and fire.
●Make sure there is no dust or clogging on both the plug and the socket nor
loose connection of the socket before plugging, and plug in securely to the
end of the blade.
Accumulation of dust, clogging on the socket or plug, or loose installation of the socket could cause
electric shock and fire. Replace the socket if it is loose.
●Use the genuine optional parts. And installation should be performed by a
specialist.
If you install the unit by yourself, it could cause water leakage, electric shock and fire.
●Do not repair by yourself. And consult with the dealer about repair.
Improper repair may cause water leakage, electric shock or fire.
●Consult the dealer or a specialist about removal of the air conditioner.
Improper installation may cause water leakage, electric shock or fire.
●Turn off the power source during servicing or inspection work.
If the power is supplied during servicing or inspection work, it could cause electric shock and injury by
the operating fan.
●Shut off the power before electrical wiring work.
It could cause electric shock, unit failure and improper running.
●Perform earth wiring surely.
Do not connect the earth wiring to the gas pipe, water pipe, lightning rod and telephone earth wiring.
Improper earth could cause unit failure and electric shock due to a short circuit.
●Make sure to install earth leakage breaker on power source line.
(countermeasure thing to high harmonics.)
Absence of breaker could cause electric shock.
●Use the circuit breaker of correct capacity.
Using the incorrect capacity one could cause the system failure and fire.
●Do not use any materials other than a fuse of correct capacity where a fuse
should be used.
Connecting the circuit by wire or copper wire could cause unit failure and fire.
●Use power source line of correct capacity.
Using incorrect capacity one could cause electric leak, abnormal heat generation and fire.
●Do not mingle solid cord and stranded cord on power source and signal side
terminal block.
In addition, do not mingle difference capacity solid or stranded cord.
Inappropriate cord setting could cause loosing screw on terminal block, bad electrical contact, smoke
and fire.
●Do not turn off the power source immediately after stopping the operation.
Be sure to wait for more than 5 minutes. Otherwise it could cause water leakage or breakdown.
●Do not control the operation with the circuit breaker.
It could cause fire or water leakage. In addition, the fan may start operation unexpectedly and it may
cause injury.
① Electrical Wiring Connection
●Install an over-current and earth leakage breaker (threshold current: 30mA) specified for
each unit without fail.
●Provide a dedicated branching circuit and never share a branching circuit with other
equipment. If shared, disconnection at the circuit breaker may occur, which can cause
secondary damage.
●Set earth of D-type.
●Connection of a cable beyond 3.5 mm
in use, provide a dedicated pull box to take a branch to an indoor unit.
●Keep "remote controller line" and "power source line" away from each other on constructing
of unit outside.
●Run the lines (power source, remote controller and "between indoor and outdoor unit")
upper ceiling through iron pipe or other tube protection to avoid the damage by mouse and
so on.
●Do not add cord in the middle of line (of indoor power source, remote controller and signal)
route on outside of unit. If connecting point is flooded, it could cause problem as for electric
or communication.
(In the case that it is necessary to set connecting point on the signal line way, perform
thorough waterproof measurement.)
●Do not connect the power source line [220V/240V/380V/415V] to signal side terminal block.
Otherwise, it could cause failure.
●Screw the line to terminal block without any looseness, certainly.
●Do not turn on the switch of power source, before all of line work is done.
WARNING
CAUTION
is not permitted. When cables of over 5.5 mm
2
① Electrical Wiring Connection (continued)
●Electrical wiring work must be performed by an electlician an qualified by a
local power provider. These wiring specifications are determined on the
assumption that the following instructions are observed:
① Do not use cords other than copper ones.
Do not use any supply line lighter than one specified in parentheses for each type below.
-braided cord (code designation 60245 IEC 51), if allowed in the relevant part 2;
-ordinary tough rubber sheathed cord (code designation 60245 IEC 53);
-flat twin tinsel cord (code designation 60227 IEC 41);
-ordinary polyvinyl chloride sheathed cord (code designation 60227 IEC 53);
② Provide a separate power outlet for each outdoor or indoor unit.
③ All indoor units grouped in one system must have power source that can be turned on or off simultaneously.
④ Pay extra attention so as not to confuse signal line and power source line connection, because an error in their
connection can be burn all the boards at once.
●Connection of the line ("Between indoor and outdoor unit", Earth and Remote controller)
① Remove lid of control box before connect the above lines, and connect the lines to terminal block according to
number pointed on label of terminal block.
In addition, pay enough attention to confirm the number to lines, because there is electrical polarity except earth line.
Furthermore, connect earth line to earth position of terminal block of power source.
② Install earth leakage breaker on power source line. In addition, select the type of breaker for inverter circuit as
earth leakage breaker.
③ If the function of selected earth leakage breaker is only for earth-fault protection, hand switch (switch itself and type
"B" fuse) or circuit breaker is required in series with the earth leakage breaker.
Cabling system diagram
Power source
Earth leakage breaker
Circuit breaker
Ⓛ
Ⓝ
Earth
Power source line specification
Wiring specification
Unit type Earth leakage breaker
22-36
4 - 5 0 9 15A 30mA 0.1sec
1 2 1 1 - 0 6
In case of Duct connected -High static pressure- type
71-140
15A 30mA 0.1sec
2 4 2 2 , 0 8
Note (1) The cord distances are calculated with a voltage drop of 2%. If the distance should exceed the
above data, review the cord thickness to use in accordance with your extension cord regulations.
(2) When total extension of remote controller line is more than 100m, change the size of cord
according to "③ Remote Control, Wiring and functions".
In case of Heat recovery 3-pipe systems
Branching controller of heat recovery 3-pipe systems wiring
●When this unit is used as a "Heat Recovery 3-pipe Systems", refer to the installation
manual of a branching controller (option).
②
Address setting
Address setting is done by (1) Manual address setting or (2) Automatic address setting.
In the case of (2) "Automatic address setting", it is possible to change address setting by wired
remote controller after once complete setting.
As for details of setting procedure, refer to instructions attached to the outdoor unit for details.
③ Remote Control, Wiring and functions
● Do not install it on the following places.
(1) Place exposed to direct sunlight
(2) Places near heat devices
(3) High humidity places
Installation and wiring of remote controller
are ① Install remote controller referring to the attached manual.
2
② Wiring of remote controller should use 0.3mm
(on-site configuration)
③ Maximum prolongation of remote control wiring is 600 m.
If the prolongation is over 100m, change to the size below.
But, wiring in the remote controller case should be under 0.5mm
according to wire connecting. Waterproof treatment is necessary at the wire connecting section. Be careful about
contact failure.
100-200m ..................... 0.5mm
Under 300m ................ 0.75mm
Under 400m ................ 1.25mm
Under 600m ................ 2.0mm
④ Avoid using multi-core cables to prevent malfunction.
⑤ Keep remote controller line away from earth (frame or any metal of building).
⑥ Make sure to connect remote controller line to the remote controller and terminal block of
indoor unit. (No polarity)
174
- -
'10 • KX-SM-148
PSB012D967
PSB012D922
(Outdoor/indoor unit connection procedure)
Specification of each line
Power source line
Signal line (Shielded cord)
Outdoor unit
Remote controller line
Ⓐ Ⓑ
Use shielded cord for a signal line and connect "earth
○ B
(signal line)" at all the indoor units and
outdoor units.
Signal line (between indoor and outdoor units)
Ⓐ Ⓑ Ⓐ Ⓑ
Ⓛ
Indoor unit1 Indoor unit2
Ⓝ
Ⓧ Ⓨ
Ⓧ Ⓨ
○ Y
Remote
Remote
Earth
controller line
controller line
Ⓧ Ⓨ Ⓧ Ⓨ
Remote controller
Remote controller
Circuit breaker Wiring size
Over-
current Power
Switch Wire
protector source Signal line
breaker length
rated line
capacity
304m
2.0mm 2 0.75~
30A 15A 2 6 1 m
2
×2 1.25mm ×2
1 9 2 m
2 87m
2.0mm 0.75~
30A 15A
2
×2 1.25mm ×2
8 4 m
(4) Hot surface or cold surface enough to generate condensation
(5) Place exposed to oil mist or steam directly.
(6) Uneven surface
2 x2 core wires or cables.
2
. Change the wire size outside of the case
2
×2 core
2
× 2 core
2
× 2 core
2
× 2 core
A
2.0~3.5mm 2
0.75~1.25mm 2
0.3~2.0mm 2
Signal line
(between indoor unit)
Remote
Earth
controller
line
line
0.3mm 2
2
2.0mm
×2cores
2
0.3mm
2.0mm 2
×2cores
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