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Basic Control
SiUS281811EA
106
Part 4 Functions and Control
2.2 Compressor PI Control
Cooling Operation
Controls compressor capacity to achieve target Te value (TeS).
(1) VRT control (Default)
When the required capacity of all indoor units (suction air temperature – set temperature) is small,
the target evaporation temperature is further increased in order to adjust capacity. From the
outdoor unit side, the temperature difference for all indoor units (
Δ
T) is confirmed, and the target
temperature is changed.
(2) Constant pressure control
The target evaporation temperature is not changed.
Te setting (Make this setting while in setting mode 2.)
Heating Operation
Controls compressor capacity to achieve target Tc value (TcS).
(1) VRT control (Default)
When the required capacity of all indoor units (set temperature – suction air temperature) is small,
the target condensation temperature is further decreased in order to adjust capacity. From the
outdoor unit side, the temperature difference for all indoor units (
Δ
T) is confirmed, and the target
temperature is changed.
(2) Constant pressure control
The target condensation temperature is not changed.
Tc setting (Make this setting while in setting mode 2.)
Te:
TeS:
Tc:
TcS:
Low pressure equivalent saturation temperature
Target Te value
(Varies depending on Te setting, operating frequency, etc.)
High pressure equivalent saturation temperature
Target Tc value
(Varies depending on Tc setting, operating frequency, etc.)
Carries out compressor capacity PI control to maintain Te at constant during cooling operation
and Tc at constant during heating operation, thus ensuring stable unit performance.
Lower
Normal
VRT
(Default)
Higher
3
°
C
(37.4
°
F)
6
°
C
(42.8
°
F)
Variable
8
°
C
(46.4
°
F)
9
°
C
(48.2
°
F)
10
°
C
(50
°
F)
11
°
C
(51.8
°
F)
VRT
(Default)
Normal
Higher
Variable
46
°
C
(114.8
°
F)
52
°
C
(125.6
°
F)
Summary of Contents for SkyAir RZR-TA Series
Page 1: ...Service Manual Cooling Only 60 Hz Heat Pump 60 Hz RZR TA RZQ TA Series SiUS281811EA...
Page 202: ...SiUS281811EA 196 Part 6 Service Diagnosis 5 15 Fan Motor Connector Check for FTQ TA 311...
Page 323: ...SiUS281811EA Wiring Diagrams Part 7 Appendix 317 RZR18 24TAVJUA RZQ18 24TAVJUA 3D124495...
Page 327: ...SiUS281811EA Wiring Diagrams Part 7 Appendix 321 FHQ18 24 30PVJU FHQ36 42MVJU 3D048116C...
Page 328: ...Wiring Diagrams SiUS281811EA 322 Part 7 Appendix FAQ18 24TAVJU 3D114844B...
Page 329: ...SiUS281811EA Wiring Diagrams Part 7 Appendix 323 FBQ18 24 30 36 42 48PVJU 3D065984J...