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Air to Air Heat Exchanger
3) When switching between Bypass mode / Heat exchange ventilation from an external device
(locally procured)
(1), (4)
No voltage
a-contact
SW3
Bypass mode is applied when SW3
is closed, and Heat exchange
ventilation when it is open.
As these terminals are not used, insulate them.
SW3 [Bypass mode ventilation: ON, Heat exchanging ventilation: OFF]
• For NRC-01HE (remote controller for the Air to Air Heat Exchanger), the message on the display is
changed.
• If a command is sent to one of the units in the group, all the Air to Air Heat Exchangers in the group operate
together.
• The latter operation of the remote controller or the external device overrides the former.
NOTE
The operation mode will be automatically changed to Heat exchange mode when outdoor air temperature is below
15 °C during Bypass mode. The display remains Bypass mode.
4
Connecting an auxiliary fan or monitoring operation output (External Output)
220-240V~, 50Hz
Power supply
220V~, 60Hz
Auxiliary
fan
Contact
Lamp or management device
Terminal block for external output
If external devices is used working at a higher voltage and current than the rated values, install a relay
according to the diagram above.
Rated relay: 220-240 VAC
Connect to the terminal block for external output (1 and 2) in the electrical control box
Connection wire (locally procured): 2-core wire (H07 RN-F or 60245 IEC 66) 1.0 mm
Rated contact
Maximum: 240 VAC, 1 A
Minimum: 220 VAC, 100 mA
Contact is on during normal operation as factory default.
• Contact is off during 24-hour ventilation mode, nighttime heat purge operation, delay mode or cold mode
(temperature is below -10 °C) as factory default.
• The operation output settings can be changed. Refer to "Setting for changing the operation output" on
page 22.
35-EN
Installation Manual
Remote ON/OFF Adapter NRB-1HE
CN705
Green (1)
Yellow (2)
Red (3)
White (4)
Black (5)
Control circuit board of the
2m
Air to Air Heat Exchanger
To power
Relay contact
supply
External device
External device
External device
Terminal block for external output
2
to 2.5 mm
24 VDC, 1 A
5 VDC, 100 mA
Air to Air Heat Exchanger
5
Connecting an electric damper (electric shutter) (External Output)
Electric
damper
Connect to the terminal block for external output (3 and 4) in the electrical control box
Connection wire (locally procured): 2-core wire (H07 RN-F or 60245 IEC 66) 1.0 mm
Rated contact (3 to 5: Total value with abnormal signal output)
Maximum: 240 VAC, 1 A
Minimum: 220 VAC, 100 mA
The electric damper (electric shutter) works during normal operation, 24-hour ventilation mode, and
nighttime heat purge operation.
• The electric damper (electric shutter) also works in the following circumstances:
* While the operation is stopped intermittently in 24-hour ventilation mode
* While the operation is paused during nighttime heat purge operation
* While operating in cold mode (Temperature is below −10 °C.)
• The electric damper (electric shutter) does not work in the following circumstances:
* While the operation is stopped
* Before the monitoring operation of nighttime heat purge operation starts
* While in the delay mode
6
Monitoring an abnormal signal or the operation signal of bypass mode (External Output)
Contact
Abnormal signal or
operation signal of
normal ventilation
Connect to the terminal block for external output (3 and 5) in the electrical control box
Connection wire (locally procured): 2-core wire (H07 RN-F or 60245 IEC 66) 1.0 mm
Rated contact (3 and 4: Total value with output of the electric damper)
Maximum: 240 VAC, 1 A
2
Minimum: 220 VAC, 100 mA
It is possible to monitor an abnormal signal or the operation signal of bypass mode from the Air to Air
Heat Exchanger.
Detection of an abnormal signal is possible, as factory default.
• To change settings so that the operation signal of bypass mode can be detected, refer to "Abnormal signal
/ bypass mode signal output setting" on page 22.
– 18 –
220-240V~, 50Hz
220V~, 60Hz
Power supply
If external output is used working at a higher
voltage and current than the rated values, install
Contact
a relay according to the diagram above (diagram
for connecting an auxiliary fan).
Rated relay: 220-240 VAC
Terminal block for external output
24 VDC, 1 A
5 VDC, 100 mA
220-240V~, 50Hz
220V~, 60Hz
Power supply
Contact
Terminal block for external output
24 VDC, 1 A
5 VDC, 100 mA
Installation Manual
2
to 2.5 mm
2
2
to 2.5 mm
2
EN
36-EN
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