122
3) When switching between Bypass mode/Heat exchange ventilation from an external device
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)
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) 1.0mm
2
to 2.5mm
2
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 131.
Rated contact
Maximum: 240VAC, 1A
Minimum: 220VAC, 100mA
24VDC, 1A
5VDC, 100mA
(locally procured)
Remote ON/OFF Adapter NRB-1HE
CN705
Control circuit board of the
Air to Air Heat Exchanger
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.
(1), (4)
No voltage
a-contact
Yellow (2)
Red (3)
White (4)
Green (1)
Black (5)
2m
Power supply
Contact
Auxiliary
fan
Terminal block for external output
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: 220-240VAC
To power
supply
Relay contact
External device
Contact
External device
External device
220-240V~, 50Hz
220V~, 60Hz
Summary of Contents for VN-M1000HE
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