Si18-201
System control
Main Functions
145
3.26
Motorized Valve Control of Outdoor Unit
3.26.1 Outline of Motorized Valve Control
Outline
The EVL and EVG valve opening operations switch the with/without-receiver selection.
Cooling mode
"
When EVL is fully closed (without receiver), the BP motorized valve provides the system
control and distribution control.
EVU ... Target discharge pipe temperature control, gas pipe isothermal control
EVT ... Fully closed
EVG ... Target discharge pipe temperature control
"
When EVL is not fully closed (with receiver), EVG provides the system control.
H/U's motorized valve provides individual control. (SH control)
EVU ... SH control
EVG ... Target discharge pipe temperature control
"
Common
EVL ... Outdoor unit SC control
EVP ... Capacity control (low pressure control)
Heating mode
"
When EVG is fully closed (without receiver), the BP motorized valve provides the system
control and distribution control.
EVU ... Target discharge pipe temperature control, SC control
EVT ... Target discharge pipe temperature control
∗
Surplus refrigerant processing is conducted in non-operating room units.
∗
When motorized valves of non-operating room units are at minimum opening:
The receiver function ON is set (EVG opens).
EVL ... Target discharge pipe temperature control
"
When EVG is not fully closed (with receiver)
Not in capacity control
EVU ... Target discharge pipe temperature control, SC control
EVT ... Target discharge pipe temperature control
EVL ... Target discharge pipe temperature control
EVG ... Target discharge pipe temperature c Capacity control (high pressure control)
EVP ... Capacity control (high pressure control)
#
System control ... Provides SH control of refrigerant system, particularly suction control
Examples: SH control, target discharge pipe temperature control
#
Distribution control ... Distributes refrigerant volume to individual indoor units according to
loads. (This function does not control the absolute volume.)
Examples: Gas pipe isothermal control, liquid pipe isothermal control
#
Individual control ... Controls refrigerant amounts of refrigerant supplied to individual room
units based on the absolute volume.
Examples: SH control (determined by individual indoor units), SC control
EVL: Liquid pipe motorized valve
EVG: Gas pipe motorized valve
EVP: Discharge bypass motorized valve
(M1037)
EVL
EVG
JT100F-VD
LPS
HPS
EVP
M
M
Filter
Filter
Filter
Oil separator
Flexible
tube
Filter
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 ...