15
Figure 22 - DX compressor failure status binary signal
O
N
-O
FF
DX
COMPRESSOR START PERMISSION SIGNAL
–
COOLING MODE ONLY
For older types of DX compressors non-supporting capacity smooth regulation, a start permission signals can be output
like shown on Figure 23. The system can output two signals:
Signal Cooling 1
– for cooling capacity requirement between 0-50%
Signal Cooling 2
– for cooling capacity requirement between 50-100%
Check, if your DX compressor has 2 inputs for above listed signals. If your compressor has only one binary star permission
signal input, make only connection on Cooling 1 (G0, D03 terminals).
Figure 23 - 2 stages start permission binary signals output for DX compressor
Depending on number of binary outputs in use, a relevant setting must be done in the AHU controller settings. Refer to
Installation, Operation and Maintenance Manual VENTUS COMPACT VVS021c-VVS150c [EN]
or
and Maintenance Manual VENTUS Supended VVS005s-VVS030s [EN]
(depending on Air Handling Unit type).
Communication cable is not supplied.
DX
C
OMPRESSOR COMMUNICATION SUPPORTING HEATING AND COOLING
(R
EVERSIBLE OPERATION
)
For the DX coil supplied from DX compressor supporting both seasons operations (cooling and heating), follow below
steps.
DX
COMPRESSOR ANALOG CONTROL SIGNAL FOR COOLING AND HEATING MODE
For DX compressor enabling smooth capacity control for cooling and heating (reversible operation) mode, a 0-10V
signal from the Air Handling Unit can be output and plugged to it. Connect the analog input of your DX compressor (0-10V
standard) to the Cooling port (for the reversible operations, the Cooling port supports both modes), terminals
G0, Y3
.
Communication cable is not supplied. See Figure 24.
