Si18-201
System control
Main Functions
163
3.34
Inter-BP Units Heating Heat Exchanger Isothermal
Control
Purpose of the
Function
This function ensures appropriate refrigerant distribution to each BP unit in heating operation.
It prevents abnormal increase of the high pressure and operation with gas shortage due to
uneven refrigerant distribution (Protection function).
Outline
The indoor unit heat exchanger thermistors (of all connected room units including non-operating
room units) in heating operation are detected. Then, the highest heat exchanger temperature
DCMXT is compared with the heat exchanger temperature of each room unit. If the temperature
difference exceeds the predetermined value, it is judged that that indoor unit heat exchanger
thermistor position in subcooled zone, and the motorized valves of room units with the
temperature difference exceeding the predetermined level is opened to return to the saturation
zone.
Details
The maximum value of DCMXT of BP units is compared with DCMXT of each room. If the
temperature difference exceeds DCABC (10°C), open the motorized valve of that BP unit.
Summary of Contents for BPMK928B42
Page 9: ...Si18 201 viii Table of Contents ...
Page 71: ...Specifications Si18 201 58 Specifications ...
Page 206: ...Si18 201 Remote Controller Operations 193 1 1 2 FVX25 35KZ ...
Page 207: ...Remote Controller Si18 201 194 Operations 1 1 3 FTXD25 35KZ ...
Page 208: ...Si18 201 Remote Controller Operations 195 1 1 4 FTK FTX50 60H ...
Page 209: ...Remote Controller Si18 201 196 Operations 1 1 5 FTKD FTXD50 60 71J ...
Page 214: ...Si18 201 Remote Controller Operations 201 ...
Page 216: ...Si18 201 Remote Controller Operations 203 ...
Page 217: ...Remote Controller Si18 201 204 Operations ...
Page 237: ...Method of Field Set Si18 201 224 Operating Test ...
Page 262: ...Si18 201 Troubleshooting SkyAir Indoor Unit Service Diagnosis 249 ...
Page 393: ...Wiring Diagrams Si18 201 380 Appendix FHYC35 50 60 71KVE9 3D005668C ...
Page 394: ...Si18 201 Wiring Diagrams Appendix 381 FHYC35 50 60 71KV1C9 ...
Page 395: ...Wiring Diagrams Si18 201 382 Appendix FDYM60 03FAV1 FDYM60 03FAVAL C 3D019816D OPTION ...
Page 396: ...Si18 201 Wiring Diagrams Appendix 383 FDYM60 03FAV1C ...