Installation and Commissioning Guide
Variable Capacity Commercial
41
Installation and Commissioning Guide - Split Ducted Variable Capacity Commercial Outdoor Unit
Doc. No.0525-066 Ver. 6 221012
NOTES
• As the compressor turns ON and the Indoor fan signal is not available then indoor fan will start to run on medium
PWM speed.
• Indoor fan operation when fan signal is available:
- Compressor ON : Indoor fan will run on medium speed.
- Compressor OFF : Indoor fan will run on reduce airflow operation.
16.04. 0-10V Analogue Input for Indoor Fan with Fixed Speed Compressor
This feature allows for the compressor to be controlled externally (ON/OFF only).
Indoor Fan Connection (Indoor Board)
THIRD PARTY
INDOOR FAN
CONTROL
INPUT
COM
0-10VDC
ID FAN INPUT
0-
10V C
OM
A
UX IN
Input (DC)
Output
Fan Status
0.0 V to 0.99 V
0%
Off
1.0 V to 1.49 V
0 or 20%
Off or On
1.5 V to 9.5 V
20% to 100%
On
9.5 V to 10 V
100%
On
Fan, Compressor and Reversing Valve Connection (Outdoor Board)
+12V
COM
DRM3
COMP
DRM2
FAN
DRM1
HEAT
HEAT
COMPRESSOR
+12V
COMPRESSOR
COMPRESSOR
THIRD PARTY
CONTROL INPUT
THIRD PARTY
COMPRESSOR
CONTROL INPUT
+12VDC
HEAT
COMPRESSOR
NOTES
• As the compressor turns ON and the Indoor fan signal is not available then indoor fan will start to run on medium
PWM speed.
• If the compressor turn ON, during reduced fan operation, the controller will increase the fan speed to the "low
PWM fan limit" if it is running less than the low PWM Limits.
• Indoor fan low and high PWM limits depends upon the model.
• The Voltage can be linearly interpolated using the above table to determine the desired PWM or unit output.
• Compressor turns on with 100% speed request.
