114
③
Quit conditions
The compressor is operated in a small capacity to discharge the liquid refrigerant in the gas-liquid separator
• OR
•
Td≥Pd_t+20°C
Pd
＞
8*(Ps+0.1)-0.2MPa or Pd
＞
3.6MPa
• Ps
＜
0.07Mpa
last for 10 minutes
Compressor load control
After starting control, compressor adjust its frequency in every adjustment period (Non-heating mode: 40s; Heating
mode: Two≤40°C, 20s; Two
＞
40°C, 40s;)
When the compressor do not reach the target frequency, if there's frequency reduce requirement, it'll quit the
original setting state and operate as the command;
Continue to raise the frequency
Cooling: DerCompSpd= Load%*CompTrgtSpdInit
Heating: DerCompSpd= Load%*CompTrgtSpdInit
*Load% is the load from Hydronic box, the range is [-100%, 100%]
*DerCompSpd is the frequency modification value, the range is [-2rps, 2rps]
*CompTrgtSpdInit is the base frequency
When heating,
DerCompSpd
＞
0, raise frequency;
DerCompSpd≤0, if Pd-temp≥Two, reduce frequency; if Pd-temp
＜
Two, Der CompSpd=2Hz
