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9.1. Power supply wiring
•
Power supply cords of appliances shall not be lighter than design 245 IEC or
227 IEC.
•
A switch with at least 3 mm contact separation in each pole shall be provided
by the Air conditioner installation.
Power cable size: more than 1.5 mm
[Fig. 9.1.1] (P. 4)
A Switch 16 A
B Overcurrent protection 16 A
C Indoor unit
D Total operating current be less than 16 A
E Pull box
[Selecting non-fuse breaker (NF) or earth leakage breaker (NV)]
To select NF or NV instead of a combination of Class B fuse with switch, use the
following:
•
In the case of Class B fuse rated 15 A or 20 A,
NF model name (MITSUBISHI): NF30-CS (15 A) (20 A)
NV model name (MITSUBISHI): NV30-CA (15 A) (20 A)
Use an earth leakage breaker with a sensitivity of less than 30 mA 0.1 s.
Caution:
Do not use anything other than the correct capacity breaker and fuse. Using
fuse, wire or copper wire with too large capacity may cause a risk of mal-
function or fire.
9.2. Connecting remote controller, indoor
and outdoor transmission cables
(Remote contoroller is optionally available.)
•
Connect indoor unit TB5 and outdoor unit TB3. (Non-polarized 2-wire)
The "S" on indoor unit TB5 is a shielding wire connection. For specifications
about the connecting cables, refer to the outdoor unit installation manual.
•
Install a remote controller following the manual supplied with the remote con-
troller.
•
Connect the "1" and "2" on indoor unit TB15 to a MA remote controller. (Non-
polarized 2-wire)
•
Connect the "M1" and "M2" on indoor unit TB5 to a M-NET remote controller.
(Non-polarized 2-wire)
•
Connect the remote controller's transmission cable within 10 m using a 0.75 mm
core cable. If the distance is more than 10 m, use a 1.25 mm
[Fig. 9.2.1] (P.4) MA Remote controller
[Fig. 9.2.2] (P.4) M-NET Remote controller
A Terminal block for indoor transmission cable
B Terminal block for outdoor transmission cable
C Remote controller
•
DC 9 to 13 V between 1 and 2 (MA remote controller)
•
DC 24 to 30 V between M1 and M2 (M-NET remote controller)
[Fig. 9.2.3] (P.4) MA Remote controller
[Fig. 9.2.4] (P.4) M-NET Remote controller
A Non-polarized
C Remote Controller
•
The MA remote controller and the M-NET remote controller cannot be used at
the same time or interchangeably.
Note:
Ensure that the wiring is not pinched when fitting the terminal box cover.
Pinching the wiring may cut it.
Caution:
Install wiring so that it is not tight and under tension. Wiring under tension
may break, or overheat and burn.
•
Fix power source wiring to control box by using buffer bushing for tensile force.
(PG connection or the like.) Connect transmission wiring to transmission ter-
minal block through the knockout hole of control box using ordinary bushing.
•
After wiring is complete, make sure again that there is no slack on the connec-
tions, and attach the cover onto the control box in the reverse order removal.
Caution:
Wire the power supply so that no tension is imparted. Otherwise disconnec-
tion, heating or fire result.
10
2
2
junction cable.
B Upper level (TB15)
D Lower level (TB5)
9.3. Connecting electrical connections
Verify that the model name on the operating instructions on the cover of the
control box is the same as the model name on the nameplate.
Step 1
Remove the screws holding the terminal box cover in place.
•
Type 40 - 140 (2 screws)
•
Type 200 · 250 (4 screws)
[Fig. 9.3.1] (P. 4)
Fig.1
Fig.2
A Screws
C Control box cover
Note:
Ensure that the wiring is not pinched when fitting the terminal box cover.
Pinching the wiring may cut it.
Caution:
Install wiring so that it is not tight and under tension. Wiring under tension
may break, or overheat and burn.
•
Fix power source wiring to control box by using buffer bushing for tensile
force. (PG connection or the like.) Connect transmission wiring to transmis-
sion terminal block through the knockout hole of control box using ordinary
bushing.
•
After wiring is complete, make sure again that there is no slack on the con-
nections, and attach the cover onto the control box in the reverse order re-
moval.
[Fig. 9.3.2] (P. 4)
A To prevent external tensile force from applying to the wiring connection section
of power source terminal block use buffer bushing like PG connection or the
like.
B Power source wiring
D Use ordinary bushing
Caution:
Wire the power supply so that no tension is imparted. Otherwise discon-
nection, heating or fire result.
9.4. Selecting the static pressure
Type 40 - 140
2
The external static pressure can be changed over as required. For the selection
of the static pressure, insert an attachment between the connector of the motor
lead wire and the control box.
The relationship between the attachment and the external static pressure is shown
below.
Attachment (Red) ....... External static pressure 200 Pa
Attachment (Blue) ...... External static pressure 50 Pa
Type 200 · 250
The external static pressure can be changed over as required.
For the selection of static pressure, replace the connector of the motor lead wire
by the connector (blue) inside the control box for insertion.
9.5. Setting addresses
(Be sure to operate with the main power turned OFF.)
[Fig. 9.5.1] (P. 4)
<Address board>
•
There are two types of rotary switch setting available: setting addresses 1 to
9 and over 10, and setting branch numbers.
1 How to set addresses
Example: If Address is "3", remain SW12 (for 1 to 9) at "0", and match
SW11 (for over 10) with "3".
2 How to set branch numbers (Series R2 only)
Match the indoor unit's refrigerant pipe with the BC controller's end con-
nection number. Remain other than R2 at "0".
•
The rotary switches are all set to "0" when shipped from the factory. These
switches can be used to set unit addresses and branch numbers at will.
•
The determination of indoor unit addresses varies with the system at site. Set
them referring to technical data.
Notes:
Please set the switch SW5 according to the power supply voltage.
•
Set SW5 to 240 V side when the power supply is 230 and 240 volts.
•
When the power supply is 220 volts, set SW5 to 220 V side.
9.6. Sensing room temperature with the
built-in sensor in a remote controller
If you want to sense room temperature with the built-in sensor in a remote con-
troller, set SW1-1 on the control board to "ON".
Fig.1
Fig.2
B Terminal box cover
D Control box
C Tensile force
E Transmission wiring
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