Startup Control
SiUS341802E
45
Functions and Control
4. Startup Control
This control is used to equalize the pressure in the front and back of the compressor prior to the startup of the
compressor, thus reducing startup loads. Furthermore, the inverter is turned ON to charge the capacitor.
To avoid stresses to the compressor due to oil return or else after the startup, the following control is made and
the position of the four way valve is also determined. Start both the master and the slave units simultaneously to
position the four way valve.
4.1
Startup Control in Cooling
DSH: Discharge pipe superheated degree
Pc : High pressure sensor detection value
Pe : Low pressure sensor detection value
Ta : Outdoor air temperature
0 Hz
0 pulse
3,000 pulse (fully open)
Step 15
Pc – Pe > 0.42 MPa (60.9 psi)
DSH > 10˚C (18˚F)
Pc – Pe > 0.32 MPa (46.4 psi)
20 rps or more
OR
&
Ta < 20˚C: OFF
(68˚F)
Ta
≥
20˚C: StepX/2
(68˚F)
Frequency step up
5 sec. interval
+3step/15 sec. (Pc > 2.16 MPa (313 psi))
–3step/15 sec. (Pc < 1.77 MPa (257 psi))
Inverter compressor
(M1C)
Electronic expansion
valve (main)
(Y1E)
Inverter fan
(M1F + M2F)
Pc – Pe > 0.17 MPa (24.7 psi)
A
B
C
D
E
RXLQ72TA
RXYQ72-120TA
19
24
29
38
57
RXLQ96/120TA
RXYQ144/168TA
16.4
16.4
18
24
36
A
B
C
D
E
Frequency
(rps)
Содержание Aurora Series
Страница 316: ...Wiring Diagrams SiUS341802E 303 Appendix 1 Wiring Diagrams 1 1 Outdoor Unit RXLQ72TATJU 2D112580A ...
Страница 317: ...SiUS341802E Wiring Diagrams Appendix 304 RXLQ96 120TATJU 2D112581A ...
Страница 318: ...Wiring Diagrams SiUS341802E 305 Appendix RXLQ72TAYDU 2D112582A ...
Страница 319: ...SiUS341802E Wiring Diagrams Appendix 306 RXLQ96 120TAYDU 2D112583A ...
Страница 320: ...Wiring Diagrams SiUS341802E 307 Appendix RXLQ72 96 120TAYCU RXYQ72 96 120 144 168TAYCU 2D112579A ...
Страница 330: ...Wiring Diagrams SiUS341802E 317 Appendix 1 3 2 Energy Recovery Ventilator VAM Series VAM300 470 600GVJU 3D073269C ...
Страница 331: ...SiUS341802E Wiring Diagrams Appendix 318 VAM1200GVJU 3D073270C ...
Страница 332: ...Revision History Month Year Version Revised contents 04 2018 SiUS341802E First edition ...