Duct Work; Electrical Work - Mitsubishi Electric Mr.SLIM SEZ-M25DA Installation Manual

7. Duct work
• When connecting ducts, insert a canvas duct between the main body and the duct.
• Use non-combustible duct components.
Caution:
• The noise from the intake will increase dramatically if intake Ⓐ is fitted
directly beneath the main body. Intake Ⓐ should therefore be installed as
far away from the main body as possible.
Particular care is required when using it with bottom inlet specifications.
• Install sufficient thermal insulation to prevent condensation forming on
outlet duct flanges and outlet ducts.
• To connect the air conditioner main body and the duct for potential
equalization.
• To reduce the risk of injury from metal sheet edges, wear protective
gloves.
8. Electrical work
8.1. Power supply
Electrical specification
SEZ-M25 SEZ-M35 SEZ-M50 SEZ-M60 SEZ-M71
Power supply
(1 phase ~/N, 230V, 50Hz)
10
Warning:
• The compressor will not operate unless the power supply phase connection
is correct.
• Grounding protection with a no-fuse breaker (earth leakage breaker [ELB])
is usually installed for Ⓓ .
• The connection wiring between the outdoor and indoor units can be
extended up to a maximum of 50 meters, and the total extension including
the crossover wiring between rooms is a maximum of 80 m.
A switch with at least 3 mm contact separation in each pole shall be provided
by the air conditioner installation.
* Label each breaker according to purpose (heater, unit etc.).
[Fig. 8-1] (P.5)
Ⓐ Indoor unit
Ⓑ Outdoor unit
Ⓒ Wired remote controller
Ⓓ Main switch/fuse
Ⓔ Grounding
8.2. Indoor wire connection
Work procedure
1. Remove 2 screws to detach the electric component cover.
2. Route each cable through the wiring intake into the electric component box.
(Procure power cable and in-out connecting cable locally and use remote
control cable supplied with the unit.)
3. Securely connect the power cable and the in-out connecting cable and the
remote control cable to the terminal blocks.
4. Secure the cables with clamps inside the electric component box.
5. Attach the electric component cover as it was.
• Fix power supply cable and indoor/outdoor cable to control box by using buffer
bushing for tensile force. (PG connection or the like.)
Warning:
• Attach the electrical part cover securely. If it is attached incorrectly, it could
result in a fire, electric shock due to dust, water, etc.
• Use the specified indoor/outdoor unit connecting wire to connect the
indoor and outdoor units and fix the wire to the terminal bed securely so
that no stress is applied to the connecting section of the terminal bed.
Incomplete connection or fixing of the wire could result in a fire.
[Fig. 8-2-1] (P.5)
Ⓐ Screw holding cover (2pcs)
Ⓑ Cover
[Fig. 8-2-2] (P.5)
Ⓐ Terminal bed box
Ⓑ Knockout hole
Ⓒ Remove
[Fig. 8-2-3] (P.5)
Ⓔ Use PG bushing to keep the weight of the cable and external force from being applied to
the power supply terminal connector. Use a cable tie to secure the cable.
Ⓕ Indoor/outdoor unit connecting wire
Ⓖ Tensile force
Ⓗ Use ordinary bushing
Ⓘ Transmission wiring
Input capacity Main Switch/Fuse (A)
10 20 20
• To avoid electrical noise interference, do not run transmission lines at the
bottom of the unit.
• Keep the distance between the inlet grille and the fan over 850 mm.
If it is less than 850 mm, install a safety guard not to touch the fan.
[Fig. 7-1] (P.5)
Ⓐ Air inlet
Ⓑ Air outlet
Ⓒ Access door
Ⓓ Ceiling surface
Ⓔ Canvas duct
Ⓕ Air filter
Ⓖ Inlet grille
[Fig. 8-2-4] (P.5)
Ⓙ Terminal bed for power source and indoor transmission
Ⓚ Terminal bed for remote controller
Ⓛ Indoor/outdoor unit connecting wire
20
Ⓜ Transmission line to the remote controller
[Fig. 8-2-5] (P.6)
Ⓐ Indoor terminal block
Ⓑ Earth wire (green/yellow)
Ⓒ Indoor/outdoor unit connecting wire 3-core 1.5 mm
Ⓓ Outdoor terminal block
Ⓔ Power supply cord
① Connecting cable
2
Cable 3-core 1.5 mm
② Indoor terminal block
③ Outdoor terminal block
④ Always install an earth wire (1-core 1.5 mm
⑤ Remote controller cable
2
Wire No × size (mm ) : Cable 2C × 0.3
This wire accessory of remote controller
(wire length : 10 m, non-polar. Max. 500 m)
⑥ Wired remote controller (option)
⑦ Power supply cord
• Perform wiring as shown in [Fig. 8-2-5] (P.6). (Procure the cable locally.)
Make sure to use cables of the correct polarity only.
• Connect the terminal blocks as shown in [Fig. 8-2-5] (P.6).
Caution:
• Use care not to make mis-wiring.
• Firmly tighten the terminal screws to prevent them from loosening.
• After tightening, pull the wires lightly to confirm that they do not move.
8.3. Remote controller (wired remote controller (option))
8.3.1. For wired remote controller
1) Installing procedures
Refer to the installation manual that comes with each remote controller for details.
2) Function selection of remote controller
If two remote controllers are connected, set one to "Main" and the other to "Sub".
For setting procedures, refer to "Function selection of remote controller" in the
operation manual for the indoor unit.
8.4. Remote controller (wireless remote controller (option))
8.4.1. For wireless remote controller (option)
1) Installation area
• Area in which the remote controller is not exposed to direct sunshine.
• Area in which there is no near by heating source.
• Area in which the remote controller is not exposed to cold (or hot) winds.
• Area in which the remote controller can be operated easily.
• Area in which the remote controller is beyond the reach of children.
* The signal can travel up to approximately 7 meters (in a streight line) within 45
degrees to both right and left of the center line of the receiver.
2) Installing procedures
Refer to the installation manual that comes with each remote controller for details.
8.4.2. Signal Receiving Unit
1) Sample system connection
[Fig. 8-4-1] (P.6)
Indoor/outdoor wiring
Signal receiving unit wiring
Ⓐ Outdoor unit
Ⓑ Refrigerant address
Ⓒ Indoor unit
Ⓓ Signal receiving unit
2 or more
, in conformity with Design 245 IEC 57.
2
) longer than other cables
15