Siemens POLYCOOL RWR470.10 - 10 Paramter Tables; Compressor Settings

9 Main Control Logic
Compressor Capacity Control
For the compressor with stages, it will be started with full capacity when the system on.
Band1
Band1
Cooling
Setpoint
Temperature
Time
3390D01
+
+
In cooling mode:
• When the actual supply/return temperature is higher than the cooling setpoint (ST01)
+ temperature band (ST03), the compressor capacity will be gradually increased by
stages every a preset time (ST17).
• When the actual supply/return temperature is lower than the cooling setpoint (ST01) -
temperature band (ST03), the compressor capacity will be gradually decreased by
stages every a preset time (ST17).
Band2
Band2
Heating
Setpoint
Temperature
Time
3390D02
+
+
In heating mode:
• When the actual supply/return temperature is lower than the heating setpoint (ST02) -
temperature band (ST04), the compressor capacity will be gradually increased by
stages every a preset time (ST17).
• When the actual supply/return temperature is higher than the heating setpoint (ST02)
+ temperature band (ST04), the compressor capacity will be gradually decreased by
stages every a preset time (ST17).
17/28
Siemens Building Technologies SIEMENS Controller HEAT PUMP controller
HVAC Products 27.11.2006