Toshiba MMD-VNK502HEXE Installation Manual page 18

33-EN
Air to Air Heat Exchanger with DX Coil Unit
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.
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.
Installation Manual
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
2m
with DX Coil Unit
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
2m with DX Coil Unit
– 17 –
Air to Air Heat Exchanger with DX Coil Unit
4
Connecting an auxiliary fan or monitoring operation output (External Output)
Power supply
Auxiliary
fan
Lamp or management device
Terminal block for external output
To power supply Relay contact
External device
External device
External device
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
Rated contact
Maximum: 240VAC, 1A
Minimum: 220VAC, 100mA
Contact is on during normal operation as factory default.
• Contact is off during nighttime heat purge operation or while fan operation is off to protect the unit.
• The operation output settings can be changed. Refer to "Setting for changing the operation output" on
page 21.
5
Connecting an electric damper (electric shutter) (External Output)
220-240V~, 50Hz
220V~, 60Hz
Power supply
Electric
damper
Terminal block for external output
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) 1.0mm
Rated contact (3 to 5: Total value with abnormal signal output)
Maximum: 240VAC, 1A
Minimum: 220VAC, 100mA
220-240V~, 50Hz
220V~, 60Hz
Contact
If external devices is used working at a higher
voltage and current than the rated values, install
a relay according to the diagram below.
Rated relay: 220-240VAC
Contact
Terminal block for external output
24VDC, 1A
5VDC, 100mA
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: 220-240VAC
24VDC, 1A
5VDC, 100mA
34-EN
Installation Manual
2 to 2.5mm 2
2 to 2.5mm 2