Toshiba MMD-VNK502HEX1E Installation Manual page 69

2
Switching the remote controller between invalid / valid or low / high from an external device
(separately sold External Input)
* Perform connection with one of the units in the group.
* Static signal only
Insert the remote ON/OFF adapter NRB-1HE (sold separately) into connector CN705.
• Transmission wire used to extend must be locally procured: Non-polarity, shielded wire (H05 VVC4V5-K or
60227 IEC 74) 0.5 mm
2
Maximum length: 50 m
If a polar contact such as a photocoupler is used with a no
voltage a-contact, connect the positive pole to terminal (2),
(3) or (4) and the negative pole to terminal (1).
1) When switching the remote controller between invalid / valid from an external device
(locally procured)
(1), (2)
No voltage
SW1
a-contact
The remote controller is
inoperable when SW1 is
closed.
As these terminals are not used, insulate them.
SW1 [Remote controller Invalid: ON, Valid: OFF]
• For NRC-01HE (remote controller for the Air to Air Heat Exchanger with DX Coil Unit), when one of the
buttons below is pressed, blinks and the operation is invalid.
* [ON/OFF] button
* [VENT] button
* [VENT MODE] button
* [VENT FAN] button
• For RBC-AMT32E (remote controller for the air conditioner), pressing the [ON/OFF] button has no effect.
• When the remote controller is inoperable, nighttime heat purge operation are not available.
• If a command is sent to one of the units in the group, the invalid / valid setting of the remote controller in
the group can be switched.
135-EN
Specification of the external contact:
Contact for microcurrent
DC12 V 1 mA
Adapter for remote ON/OFF control
NRB-1HE
CN705
Green (1)
Yellow (2)
Red (3)
White (4)
Black (5)
Control circuit board of the
Air to Air Heat Exchanger
2 m
with DX Coil Unit
2) When switching between low / high from an external device
(locally procured)
(1), (3)
No voltage
a-contact
SW1
Low is applied when SW2
is closed, and High when
it is open.
As these terminals are not used, insulate them.
SW2 [Low: ON, High: OFF]
• For NRC-01HE (remote controller for the Air to Air Heat Exchanger with DX Coil Unit), the message on the
display is changed. However, when the air conditioner operates Air to Air Heat Exchanger with DX Coil
Unit system linked with air conditioners, ventilation fan speed (Low / High) is changed though the
ventilation amount is not shown on the display.
• If a command is sent to one of the units in the group, all the Air to Air Heat Exchanger with DX Coil Units
in the group operate together.
• The latter operation of the remote controller or the external device overrides the former.
– 68 –
Adapter for remote ON/OFF control
NRB-1HE
CN705
Green (1)
Yellow (2)
Red (3)
White (4)
Black (5)
Control circuit board of the
Air to Air Heat Exchanger
2 m with DX Coil Unit
136-EN