SiUS342004EB
Outline of Control (Indoor Unit)
Part 4 Functions and Control
112
Assuming suction temperature has changed from 30°C (86°F) to 18°C (64°F) (F
A):
Suction air thermistor is used for temperatures from 30
C (86
F) to 25
C (77
F) (F
D).
Remote controller thermistor is used for temperatures from 25
C (77
F) to 21
C (70
F) (D
B).
Suction air thermistor is used for temperatures from 21
C (70
F) to 18
C (64
F) (B
A).
Heating
When heating, the hot air rises to the top of the room, resulting in the temperature being lower near
the floor where the occupants are. When controlling by suction air thermistor only, the indoor unit
may therefore be turned off by the thermostat before the lower part of the room reaches the set
temperature. The temperature can be controlled so the lower part of the room where the occupants
are does not become cold by widening the range in which remote controller thermistor can be used
so that suction temperature is higher than the set temperature.
Assuming the set temperature in the figure above is 24°C (75°F), and the suction
temperature has changed from 18°C (64°F) to 28°C (82°F) (A
D):
(This example also assumes there are several other air conditioners, and the suction temperature
changes even when the thermostat sensor is off.)
Suction air thermistor is used for temperatures from 18°C (64°F) to 25°C (77°F) (A
C).
Remote controller thermistor is used for temperatures from 25°C (77°F) to 28°C (82°F) (C
D).
Assuming suction temperature has changed from 28°C (82°F) to 18°C (64°F) (D
A):
Remote controller thermistor is used for temperatures from 28°C (82°F) to 23°C (73°F) (D
B).
Suction air thermistor is used for temperatures from 23°C (73°F) to 18°C (64°F) (B
A).
Range in
w
hich remote controller
thermistor can be used
Range in
w
hich
suction air thermistor
can be used
Differential
Suction air temperature (TH1)
Set temperature (Ts)
12
14
16
1
8
20
22
24
26
2
8
30
32
34
53.6
57.2
60.
8
64.4
6
8
.0
71.6
75.2
7
8
.
8
8
2.4
8
6.0
8
9.6
93.2
°
C
°
F
°
C
32
30
2
8
26
24
22
20
1
8
16
°
F
8
9.6
8
6.0
8
2.4
7
8
.
8
75.2
71.6
6
8
.0
64.4
60.
8
TH1 = Ts + 12
≤
33
°
C
TH1 = Ts + 21.6
≤
91.4
°
F
TH1 = Ts + 10
≤
31
°
C
TH1 = Ts + 1
8
≤
8
7.
8
°
F
TH1 = Ts + 1
≤
31
°
C
TH1 = Ts + 1.
8
≤
8
7.
8
°
F
TH1 = Ts – 1
°
C
TH1 = Ts – 1.
8
°
F
Summary of Contents for VRV RXYQ72-384XAYCA
Page 1: ...Service Manual RXYQ72 384XAYCA RXYQ72 384XBYCA Heat Pump 60 Hz SiUS342004EB...
Page 395: ...SiUS342004EB Wiring Diagrams Part 7 Appendix 388 FXFQ07 09 12 15 18 24 30 36 48TVJU 3D086460B...
Page 397: ...SiUS342004EB Wiring Diagrams Part 7 Appendix 390 FXZQ05 07 09 12 15 18TAVJU 3D110443A...
Page 401: ...SiUS342004EB Wiring Diagrams Part 7 Appendix 394 FXEQ07 09 12 15 18 24PVJU 3D098557A...
Page 402: ...Wiring Diagrams SiUS342004EB 395 Part 7 Appendix FXDQ07 09 12 18 24MVJU C 3D050501C...
Page 409: ...SiUS342004EB Wiring Diagrams Part 7 Appendix 402 FXHQ12 24 36MVJU 3D048116C...
Page 410: ...Wiring Diagrams SiUS342004EB 403 Part 7 Appendix FXAQ07 09 12 18 24PVJU 3D075354F...
Page 418: ...Wiring Diagrams SiUS342004EB 411 Part 7 Appendix VAM1200GVJU 3D073270D...
