Mitsubishi Electric PAC-AK52BC Manuel D'installation page 7

9. Electrical work
Fig. 9-1
Fig. 9-3
Fig. 9-4
All manuals and user guides at all-guides.com
► Cautions for electrical work.
• Always use dedicated circuits with breakers, and at the rated voltage.
• Always ensure that electrical wiring inlets are sealed when the branch box
• Be sure to establish an earth. Do not earth the unit to a utility pipe,
• Use the specified electrical wiring and ensure that it is connected properly,
Fig. 9-2
► Wiring connecting branch box and outdoor unit, and branch box and in-
► Ensure that the appropriate refrigerant piping and electrical wiring are
► Always fix each ground wire separately with a ground screw.
► To prevent that wiring installed in the ceiling is chewed by rats etc., it
9.1. When using wiring conduit (Fig. 9-4)
Replace the horizontal cover when the wiring conduit has been fixed in place.
Wiring conduit of up to 1" OD may be used.
(1) When using 1" OD wiring conduit, remove the bush and fix to the branch box.
*
(2) When using wiring conduit of 3/4" OD or smaller, notch the bush and insert the
Warning:
Power supply circuits with insufficient capacity, and bad workmanship dur-
ing installation, may result in electric shock or fire.
is installed outdoors.
Rainwater on the terminal blocks may result in fire or malfunction.
Caution:
arrester, or telephone earth.
Incomplete earth may cause electrical shock. A high surge current from
lightning or other sources may cause damage to the air conditioner.
and that it is not under tension.
Failure to follow these requirements may result in broken wiring, heating,
or fire.
door units, functions as both power supply and signal cable. Connect this
wiring in accordance with the terminal block numbers to ensure correct
polarity.
connected to each indoor unit. Incorrect wiring will interfere with the cor-
rect operation of the unit.
► Connect refrigerant pipes and connection wires to the appropriate ports
marked with matching alphabets (Ex. A, B, C, D, E) on this unit.
should be installed in wiring conduit.
1. Remove the screws in the cover. (Fig. 9-1)
2. Remove the cover.
3. Pass the wiring into the branch box. (Fig. 9-2)
4. Fix each wire in place with a wiring clamp. (Fig. 9-3)
5. Firmly connect each wire to the appropriate terminal block. (Fig. 9-3)
6. Replace the cover.
7. When the branch box is installed outdoors, ensure that the wiring inlets are
sealed with putty to prevent entry of rainwater. (Fig. 9-2)
Electric cover
3-Bush
Seal
Wiring
BC controller
Band
Terminal block: TB2B <To outdoor unit> ø1.6 - ø2.0
Terminal block: TB3A-TB3E <To indoor unit> ø1.6
Cover
Wiring conduit
Washer
Nut
Wiring conduit
Remove the horizontal cover while fixing to the branch box.
wiring conduit approximately 100 mm into the branch box.
* Replace the horizontal cover when the wiring conduit has been fixed in place.
7