168
Installation Manual
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
í
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 176.
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
Summary of Contents for MD-VNK802HEXE
Page 120: ...118 11Owner s Manual Excerpt ...
Page 137: ...135 12Installation Manual Excerpt ...
