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5. Refrigerant piping work
5.5. Drain piping work
• Ensure that the drain piping is downward (pitch of more than 1/100) to the
outdoor (discharge) side. Do not provide any trap or irregularity on the way. ( ① )
• Ensure that any cross-wise drain piping is less than 20 m (excluding the
difference of elevation). If the drain piping is long, provide metal braces to prevent
it from waving. Never provide any air vent pipe. Otherwise drain may be ejected.
• Use a hard vinyl chloride pipe VP-25 (with an external diameter of 32 mm) for
drain piping.
• Do not provide any odor trap at the drain discharge port.
• Put the end of the drain piping in a position where no odor is generated.
• Do not put the end of the drain piping in any drain where ionic gases are
generated.
[Fig. 5-5-1] (P.6)
Ⓐ Downward slope 1/100 or more
Ⓑ Drain hose (Accessory)
Ⓒ Indoor unit
Ⓓ Collective piping
6. Duct work
• When connecting ducts, insert a canvas duct between the main body and the
duct.
• Use non-combustible duct components.
• Install sufficient thermal insulation to prevent condensation forming on air inlet
and air outlet duct flanges, and air outlet ducts.
[Fig. 6-0-1] (P.7)
Ⓐ Air inlet
Ⓑ Air filter
Ⓒ Duct
Ⓓ Canvas duct
Ⓔ Access door
Ⓕ Wall
Ⓖ Air outlet
7. Electrical work
7.1. Power supply
7.1.1. Indoor unit power supplied from outdoor unit
The following connection patterns are available.
The outdoor unit power supply patterns vary on models.
[Fig. 7-1] (P.7)
Ⓐ Indoor unit
Ⓑ Outdoor unit
Ⓒ Wired remote controller
Ⓓ Main switch/fuse
Ⓔ Grounding
Field electrical wiring
Indoor unit model
Indoor unit power supply (Heater)
Indoor unit power supply (Heater) earth
Wiring Wire No.
Indoor unit-Outdoor unit
2
× size (mm
)
Indoor unit-Outdoor unit earth
Remote controller-Indoor unit
Indoor unit (Heater) L-N
Indoor unit-Outdoor unit S1-S2
Circuit rating
Indoor unit-Outdoor unit S2-S3
Remote controller-Indoor unit
*1 The 10 m wire is attached in the remote controller accessory. Max. 500 m
*2 The figures are NOT always against the ground. S3 terminal has 24 V DC
against S2 terminal. However between S3 and S1, these terminals are not
electrically insulated by the transformer or other device.
Notes:
1. Wiring size must comply with the applicable local and national code.
2. Power supply cords and indoor unit/outdoor unit connecting cords shall
not be lighter than polychloroprene sheathed flexible cord. (Design 245
IEC57)
3. Install an earth longer than other cables.
4. Indoor and outdoor connecting wires have polarities. Make sure to
match the terminal number (S1, S2, S3) for correct wirings.
5. Wiring for remote controller cable shall be apart (5 cm, 2 inch or more)
from power source wiring so that it is not influenced by electric noise
from power source wiring.
18
1. Insert the drain hose (accessory) into the drain port.
The connecting part between the indoor unit and the drain hose may be
disconnected at the maintenance. Fix the part with the accessory band, not be
adhered.
2. Attach the drain pipe (O.D. ø32 PVC TUBE, field supply).
(Attach the pipe with glue for the hard vinyl chloride pipe, and fix it with the band
(small, accessory).)
3. Perform insulation work on the drain pipe (O.D. ø32 PVC TUBE) and on the
socket (including elbow).
[Fig. 5-5-2] (P.6)
Ⓐ Indoor unit
Ⓑ Tie band (accessory)
Ⓒ Band fixing part
Ⓓ Insertion margin
Ⓔ Drain hose (accessory)
Ⓕ Drain pipe (O.D. ø32 PVC TUBE, field supply)
Ⓖ Insulating material (field supply)
7.2. Indoor wire connection
Work procedure
1. Remove the screws holding the cover to dismount the cover.
2. Punch out the knockout holes. (Recommended tool: screwdriver)
3. 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.)
4. Securely connect the power cable and the in-out connecting cable and the
remote control cable to the terminal blocks.
5. Secure the cables with clamps inside the electric component box.
6. 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
SFZ
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
3 × 1.5 (polar)
stress is applied to the connecting section of the terminal bed. Incomplete
1 × Min. 1.5
connection or fixing of the wire could result in a fire.
2 × 0.3
[Fig. 7-2-1] (P.8)
*1
(Non-polar)
Ⓐ Screw holding cover (3 pcs.)
*2
-
Ⓑ Cover
*2
230 V AC
[Fig. 7-2-2] (P.8)
*2
24 V DC
*2
14 V DC
Ⓐ Terminal bed box
Ⓑ Knockout hole
Ⓒ Remove
[Fig. 7-2-3] (P.8)
Ⓐ Use a cable tie to secure the cable.
Ⓑ Use PG bushing to keep the weight of the cable and external force from being applied to
the power supply terminal connector.
Ⓒ Indoor/outdoor unit connecting wire
Ⓓ Use ordinary bushing
Ⓔ Terminal bed for power source and indoor transmission
Ⓕ Terminal block for remote controller
Ⓖ Transmission line to the remote controller
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