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3
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) 1.0 mm
2
to 2.5 mm
2
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 73.
4
Connecting an electric damper (electric shutter) (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) 1.0 mm
2
to 2.5 mm
2
Rated contact
Maximum: 240 VAC, 1 A
Minimum: 220 VAC, 100 mA
24 VDC, 1 A
5 VDC, 100 mA
Rated contact (3 to 5: Total value with abnormal signal output)
Maximum: 240 VAC, 1 A
Minimum: 220 VAC, 100 mA
24 VDC, 1 A
5 VDC, 100 mA
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 below.
Rated relay: 220-240 VAC
To power supply
Relay contact
External device
Contact
External device
External device
220-240 V~, 50 Hz
220 V~, 60 Hz
Power supply
Contact
Electric
damper
Terminal block for external output
If external output is used working at a higher
voltage and current than the rated values, install
a relay according to the diagram above (diagram
for connecting an auxiliary fan).
Rated relay: 220-240 VAC
220-240 V~, 50 Hz
220 V~, 60 Hz
The electric damper (electric shutter) works during normal operation, and nighttime heat purge
operation.
• The electric damper (electric shutter) also works in the following circumstances:
* 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
5
Monitoring an abnormal signal or the operation signal of bypass mode (External Output)
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
2
to 2.5 mm
2
It is possible to monitor an abnormal signal or the operation signal of bypass mode from the Air to Air
Heat Exchanger with DX Coil Unit.
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 73.
6
Connecting a humidistat, etc. (VNK type only)
Remove the short wires fixed on the terminal block TB4 with screws. (You need not use these wires.)
Connect a humidistat, etc. to the terminal block using the screws.
Rated contact (3 and 4: Total value with output of the electric damper)
Maximum: 240 VAC, 1 A
Minimum: 220 VAC, 100 mA
24 VDC, 1 A
5 VDC, 100 mA
Power supply
Contact
Terminal block for external output
Abnormal signal or
operation signal of
normal ventilation
220-240 V~, 50 Hz
220 V~, 60 Hz
Contact rating:
1A or more
Humidistat, etc.
(Closed when humidification is allowed.)
AC220-240 V
137-EN
138-EN
+00EH99887601-2_01EN.book Page 69 Thursday, September 15, 2016 5:23 PM
