Operating Conditions - Mitsubishi Heavy Industries SRK60ZSX-S Technical Manual

(iii) Reset conditions
1)
2)
(d) Cooling high pressure control
(i) Purpose
Prevents anomalous high pressure operation during cooling.
(ii) Detector
Outdoor heat exchanger sensor (TH1).
(iii) Detail of operation
(Example) Compressor speed
P1
Outdoor heat exchanger temperature (°C)
Notes (1) When the outdoor heat exchanger temperature is in the range of P2-P3 , the speed is reduced by 8 rps at each 20 seconds.
(e) Cooling low outdoor air temperature protective control
(2) When the temperature is P3
(i) (3) When the outdoor heat exchanger temperature is in the range of P1-P2

Operating conditions

more than 20 seconds at the same speed, it returns to the normal cooling operation.
When the outdoor air temperature (TH2) is 22°C or lower continues for 20 seconds while the compressor speed is other than 0 rps.
(ii) Detail of operation
1) It controls the upper and lower limit values for the compressor speed according to the following table.
(e) Cooling low outdoor air temperature protective control
2) It checks the outdoor temperature (TH2) once every hour to judge the operation range.
(e) Cooling low outdoor air temperature protective control
(i) Operating conditions
(i) Operating conditions
When the outdoor air temperature (TH2) is 22°C or lower continues for 20 seconds while the compressor speed is other than 0 rps.
When the outdoor air temperature (TH2) is 22°C or lower continues for 20 seconds while the compressor speed is other than 0 rps.
Range B
(ii) Detail of operation
(ii) Detail of operation
SRK20, 25, 35
1) It controls the upper and lower limit values for the compressor speed according to the following table.
1) It controls the upper and lower limit values for the compressor speed according to the following table.
SRK50, 60
2) It checks the outdoor temperature (TH2) once every hour to judge the operation range.
2) It checks the outdoor temperature (TH2) once every hour to judge the operation range.
Upper 2
ON
Lower 2
Range B
Range B
SRK20, 25, 35
SRK20, 25, 35
SRK50, 60
SRK50, 60
Upper 2
ON
A B
Upper 2
ON
Lower 2
Outdoor air temperature (°C)
Lower 2
A B
A B
Outdoor air temperature (°C)
Outdoor air temperature (°C)
(iii) Reset conditions
When either of the following condition is satisfied.
1) The outdoor air temperature (TH2) is D°C or higher.
2) The compressor speed is 0 rps.
(f ) Heating high pressure control
(iii) Reset conditions
(i) Purpose
(iii) Reset conditions
When either of the following condition is satisfied.
When either of the following condition is satisfied.
1) The outdoor air temperature (TH2) is D°C or higher.
(ii) Detector
1) The outdoor air temperature (TH2) is D°C or higher.
2) The compressor speed is 0 rps.
2) The compressor speed is 0 rps.
(f ) Heating high pressure control
(iii) Detail of operation
(f ) Heating high pressure control
(i) Purpose
(Example)
(i) Purpose
Compressor
speed
(ii) Detector
(ii) Detector
(iii) Detail of operation
(iii) Detail of operation
(Example)
(Example)
Compressor
Compressor
After lapse of 30 sec. or over (3)
After lapse of 30 sec. or over (3)
After lapse of 30 sec. or ove r (3)
or higher, the compressor is stopped.
Compressor speed: Upper/lower limit (rps)
Lower 1
Upper 1 Lower 2
Range A
20 Release 70 30
35 Release 75 45
Compressor speed: Upper/lower limit (rps)
Compressor speed: Upper/lower limit (rps)
Lower 1
Upper 1 Lower 2
Lower 1
Range A
Upper 1 Lower 2
Upper 1
ON
Range A
20 Lower 1 Release 70 30
20 Release 70 30
35 Release 75 45
35 Release 75 45
OFF
C D
Upper 1
ON
Upper 1
ON
Lower 1
Lower 1
OFF
OFF
C D
C D
After lapse of 20 sec. or over
After lapse of 20 sec. or over
After lapse of 20 sec. or over
A
Indoor heat exchanger temperature(°C)
After lapse of 20 sec. or over
After lapse of 20 sec. or over
After lapse of 20 sec. or over
37°C (models SRK50, 60 : 40°C).
8rps (1)
8rps (1)
lower limit
speed 30rps
0rps
P2 P3
, if the compressor speed is been maintained and the operation has continued for
Range B
Upper 2
60
24
60
Outdoor air temperature ( )
Range B
Upper 2
Range B
Upper 2
Outdoor air temperature (˚C)
60
60
24
A
60
24
60 Outdoor air temperature ( )
Outdoor air temperature ( )
SRK20, 25, 35
9
SRK50, 60
Outdoor air temperature (˚C)
Outdoor air temperature (˚C)
A
A
SRK20, 25, 35
SRK20, 25, 35
9
SRK50, 60
9
SRK50, 60
4rps 8rps
(1)
(3)
4rps
(1)
(3)
lower limit
(3)
speed 35 rps
46
- -
B C
4rps 8rps
(1)
(3)
4rps 8rps
(1)
(3)
B - C
4rps
(1)
(3)
'17 • SRK-T-203
Range B
Range A
31 32 '09•SRK-DB-087D
Outdoor air tamperature(
'09•SRK-DB-087D
'09•SRK-DB-087D
Range A
26
Range A
Range A
26
B C D
26
11 22 25
B C D
B C D
11 22 25
11 22 25
(2)
8rps
(2)
0rps
D
(2)
(2)
10
8rps
(2)
)