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Air to Air Heat Exchanger
Switches and connectors on the circuit board
Remove the 4 screws to detach the electrical control cover.
* Refer to "9. Installation method for each system configuration" on page 11 about setting the switch.
Electrical control base
Screws (x 4)
Electrical control cover
Changeover switch
Changeover switch
for the central
for the group
control address
address
SW703 (No. 3)
SW703 (No.4)
Fix: ON
Header (Individual:
Auto: OFF
ON
Follower: OFF
ON
ON
ON
OFF
1
2 3 4
1
2 3 4
SW702
SW703
Changeover switch for the
indoor unit address
SW702 (No.1 to 4), 703 (No. 1
and 2)
19-EN
Installation Manual
Changeover switch
ON
for the terminator
ON
SW301 (No.1)
100 Ω: ON
OFF
None: OFF
1
2
SW 301
Changeover switch for
pulse / static
SW701 (No.1)
Pulse: ON
Level: OFF
Connectors for the external
input
Remote ON/OFF adapter
(NRB-1HE: sold separately)
CN705(5P)
No voltage a-contact input
(Remote controller
operation Invalid / Valid,
fan speed Low / High,
Ventilation mode Bypass /
Heat exchange, Operation
ON/OFF)
CN706(2P)
Voltage of DC12 V or 24 V
(ON/OFF)
Air to Air Heat Exchanger
Wire connection
Communication wire
terminal block
Wiring for the central
control (U3, U4)
Wiring for the remote
controller (A, B)
Power supply terminal
block (R(L), S(N))
External output terminal
block (1, 2, 3, 4, 5)
Operation output
Common
External damper output (3-4)
Abnormal / Bypass mode
output (3-5)
ON
ON
OFF
Power supply wire
1
2
SW 701
30
S(N)
R(L)
30
REQUIREMENT
• Pass the wires through the grommet of wiring connection holes of the Air to Air Heat Exchanger.
• Keep a margin (Approx. 100 mm) on a wire.
• The low-voltage circuit is provided for the remote controller.
• Rotate the electrical control base to open.
• Connect the power supply wire (R (L), S (N)) and the remote controller wire (A, B).
• Connect the central control wire (U1 / U3, U2 / U4) or the external output terminal block (1 to 5) if necessary.
• Tighten the screws on the terminal board firmly, then fix the wiring on the electrical control box using the
accessory cord clamp.
• Perform grounding work.
– 10 –
In a central control system, connect
the copper braid shield of central
control wire (2-core shielded wire).
Central control wire
Earth wire
10
15
Installation Manual
Remote
controller wire
Central control
wire
Earth screw
Grommet
Power supply
wire
Electrical control
box
Remote controller wire
10
15
EN
20-EN
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