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Air to Air Heat Exchanger with DX Coil Unit
Installation Manual
Air to Air Heat Exchanger with DX Coil Unit
Installation Manual
Wiring connection
NOTE
• When performing transition wiring for the remote controllers, polarity is not needed to be considered when connecting
wires to the terminal A and B on the indoor unit terminal block.
• Leave an extra length of 100 mm for each wiring so that servicing can be performed more easily.
• Low voltage circuit is applied for the remote controller.
Perform wiring so that each wire corresponds with the proper terminal number; otherwise, an electrical fault may
occur.
Wiring in the electrical control box of the indoor unit
Fix the wires using a cord clamp. Do not stretch them tight for wiring.
Wiring the indoor unit
Connect the wire matching the terminal numbers.
Incorrect connection causes a trouble.
Earth screw
Humidistat terminal block (VNK type only)
External output terminal block
Communication wire terminal block
Wiring between indoor and outdoor unit (U1, U2)
Wiring for the remote controller (A, B)
Power supply terminal block (R (L), S (N))
Operation output
Common
External damper output (3-4)
Abnormal / Bypass mode output (3-5)
Cord clamp
40
60
10
10
R
(L)
S
(N)
Earth wire
Wiring for the
remote controller
Wiring between
indoor and outdoor
unit
Earth Screw
2 mm o
r le
ss
Power supply
wire
Remote controller wiring
Wiring diagram
* Use a 0.5 mm
2
to 2 mm
2
wire.
Address setting
Refer to the Installation Manual of the outdoor unit for address setting.
* When the Air to Air Heat Exchanger with DX Coil Unit system linked with indoor air conditioners is used, set the
Air to Air Heat Exchanger with DX Coil Unit as “Follower”, referring to “Setting the address manually using the
remote controller” in the Installation Manual of the outdoor unit.
Switching between Extra High and High
When switching to Extra High, connect the black lead wire (Extra High) to the connector.
* The Orange lead wire (High) is connected as factory default.
* Connect the black lead wire both to the air supplying motor (white connector) and the air exhausting motor (red
connector).
* Refer to “Connection diagram” for the connection method.
A
B
A
B
Remote controller terminal block
Remote controller
unit
Indoor unit remote
controller terminal
block
Remote controller wire
(locally procured)
Air exhaust
(red connector)
Air supply
(white connector)
25-EN
26-EN
+00ET99805001-2.book Page 13 Tuesday, July 26, 2011 1:39 PM
