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Air to Air Heat Exchanger
Installation Manual
Air to Air Heat Exchanger
Installation Manual
8
Electric Wiring
WARNING
1. Using the specified wires, ensure to connect the wires, and fix wires securely so that the external tension to
the wires do not affect the connecting part of the terminals.
Incomplete connection or fixation may cause a fire or other troubles.
2. Connect earth wire. (grounding work)
Incomplete earthing cause an electric shock.
Do not connect earth wires to gas pipes, water pipes, lightning rods or earth wires for telephone wires.
3. Appliance shall be installed in accordance with national wiring regulations.
Capacity shortage of power circuit or incomplete installation may cause an electric shock or a fire.
CAUTION
• If incorrect/incomplete wiring is carried out, it will cause an electrical fire or smoke.
• Install an earth leakage breaker that is not tripped by shock waves.
If an earth leakage breaker is not installed, an electric shock may be caused.
• Use the cord clamps attached to the product.
• Do not damage or scratch the conductive core and inner insulator of power and communication wires when peeling
them.
• Use the power and communication wire of specified thickness, type, and protective devices required.
• Do not connect 220-240V power to the communication terminal blocks (
,
,
,
) for control wiring.
(Otherwise, the system will fail.)
REQUIREMENT
• For power supply wiring, strictly conform to the Local Regulation in each country.
• After connecting wires to the terminal blocks, provide a trap and fix wires with the cord clamp.
Power and wiring Specifications
Power supply wire and communication wire should be locally procured.
See the table below for the power supply specifications. If the capacity is too small, the unit will suffer from
overheating or burnout.
Item
Model name VN-
Power supply for Air to Air Heat Exchanger (*1)
Power supply
Circuit breaker (switch)
Power supply wire
Current rating (Fuse rating)
Air to Air Heat
Exchanger
M150HE to
M1000HE
220V-240V~, 50Hz
220V~, 60Hz
15A
3-core,
1.5 mm
2
or 2.5 mm
2
(H07 RN-F or 60245 IEC 66)
*1: Prepare the exclusive power supply for the Air to Air Heat Exchanger
U
3
U
4
A
B
Communication wire
Remote controller wiring
On the outside of the unit, do not allow the wire for the remote controller (communication wire) and the wire for AC220-240V to come into contact
or put them together in one electrical conduit; otherwise, the control system may have trouble due to noise.
* The total length of the remote controller inter-unit wiring is the same for both between the indoor units and
between the Air to Air Heat Exchanger.
Item
Model name VN-
Communication wire
Central control wire (*2)
Remote controller wire
Air to Air Heat
Exchanger
M150HE to
M1000HE
2-core, non-polarity
Shielded wire
(Up to 1000m) 1.25 mm
2
(Up to 2000m) 2.0 mm
2
2-core, non-polarity
0.5 mm
2
to 2.0 mm
2
*2:
• The length of the communication wire is the total length of the outdoor/indoor transition wire and wire of the central control
assuming that an interlocking system with the indoor unit or central control system is used.
• To prevent noise, use a 2 core shielded wire.
Remote controller wiring, remote controller inter-unit wiring
2-core, non-polarity: 0.5 mm
2
to 2.0 mm
2
Total wire length of remote controller wiring and remote controller inter-unit wiring = L + L1 + L2 + ··· Ln Up to 500mm
Total wire length of remote controller inter-unit wiring = L1 + L2 + ··· Ln
Up to 200mm
L
L1
L2
Ln
Indoor unit
Indoor unit
Air to Air
Heat
Exchanger
Air to Air
Heat
Exchanger
Remote
controller
Remote controller
wiring
Remote controller inter-unit wiring
(Up to 8 units)
13-EN
14-EN
+00ET9X463301_01EN.book Page 7 Thursday, January 20, 2011 4:41 PM
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