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Protection Control
SiUS34-801A_b
210
VRVIII R-410A Heat Recovery 60Hz
8. Protection Control
8.1
High Pressure Protection Control
This high pressure protection control is used to prevent the activation of protection devices due to
abnormal increase of high pressure and to protect compressors against the transient increase of
high pressure.
[In cooling operation]
The following control is performed in the entire system.
Pc_max indicates the maximum value within the system.
N
ormal Operation
Pc_max
>503.15psi
Pc_max
>514.75psi
Pc_max>503.15psi
Pc_max
<469.
8
psi
Pc_max
>527.
8
psi
Upper limit compressor step=max (Max. Step)
W
hen occ
u
rring 3 times
w
ithin
30 min., HPS is acti
v
ated
w
itho
u
t high
press
u
re stand
b
y, th
u
s o
u
tp
u
tting the
malf
u
nction code [
E3
].
Upper limit
compressor step:
2-step do
w
n
After 10 sec.
C
u
rrent step maintained
Upper limit
compressor step:
1-step
u
p
After 15 sec.
After 10 sec.
High press
u
re
stand
b
y
For m
u
lti
u
nits:
W
hen STD compressor is in operation
STD compressor stand
b
y
W
hen STD compressor stays stopped
52Hz+OFF+OFF (
u
pper limit)
For single
u
nit:
8
to 12HP 52Hz+OFF (
u
pper limit)
W
hen high
press
u
re is limited
(6-10 Ton)
Summary of Contents for VRV III
Page 15: ...SiUS34 801A_b xiv ...
Page 23: ...Model Selection SiUS34 801A_b 8 General Information ...
Page 133: ...Field Settings SiUS34 801A_b 118 VRVIII R 410A Heat Pump 60Hz ...
Page 254: ...SiUS34 801A_b Test Operation VRVIII R 410A Heat Recovery 60Hz 239 R 410A Label R 410A Label ...
Page 329: ...Field Setting SiUS34 801A_b 314 Indoor Unit ...
Page 340: ...SiUS34 801A_b Troubleshooting by Remote Controller Troubleshooting 325 ...
Page 490: ...SiUS34 801A_b Piping Diagrams Appendix 475 Heat Pump 230V RXYQ72 96 120PTJU 3D058636A ...
Page 491: ...Piping Diagrams SiUS34 801A_b 476 Appendix Heat Pump 230V RXYQ144PTJU 3D058640 ...
Page 492: ...SiUS34 801A_b Piping Diagrams Appendix 477 Heat Recovery 460V REYQ72 96 120PYDN 3D058639A ...
Page 493: ...Piping Diagrams SiUS34 801A_b 478 Appendix Heat Recovery 460V REMQ72PYDN 3D058637A ...
Page 494: ...SiUS34 801A_b Piping Diagrams Appendix 479 Heat Recovery 460V REMQ96 120PYDN 3D058638A ...
Page 495: ...Piping Diagrams SiUS34 801A_b 480 Appendix Heat Recovery 230V REYQ72 96 120PTJU 3D058639A ...
Page 496: ...SiUS34 801A_b Piping Diagrams Appendix 481 Heat Recovery 230V REYQ144PTJU 3D058640 ...
Page 497: ...Piping Diagrams SiUS34 801A_b 482 Appendix Heat Recovery 230V REMQ72PTJU 3D058637A ...
Page 498: ...SiUS34 801A_b Piping Diagrams Appendix 483 Heat Recovery 230V REMQ96 120PTJU 3D058638A ...
Page 501: ...Piping Diagrams SiUS34 801A_b 486 Appendix 1 3 BS Unit 4D057985A ...
Page 537: ...Piping Installation Point SiUS34 801A_b 522 Appendix ...
Page 543: ...Pressure Sensor SiUS34 801A_b 528 Appendix ...
Page 563: ...SiUS34 801A_b iv Index ...