-
76
-
(e) Cooling low outdoor air temperature protective control
(i) Operating conditions
(ii) Detail of operation
CDAB
OFF
Upper 2
Lower 2
ON
ON
Upper 1
Lower 1
Outdoor air temperature (°C)
(iii) Reset conditions
(f ) Heating high pressure control
(i) Purpose
(ii) Detector
(iii) Detail of operation
A
B
C
D
Indoor heat exchanger temperature(°C)
4rps
(1)
8rps
(2)
8rps
(2)
4rps
(1)
0rps
After lapse of 20 sec. or over
(3)
After lapse of 20 sec. or over
(3)
After lapse of 20 sec. or over
(3)
lower limit
speed 35 rps
(Example)
Compressor
speed
Temperature list
Models SRK20, 25, 35
ABCD
RPSmin < 50
50
<
=
RPSmin < 91
91
<
=
RPSmin < 97
97
<
=
RPSmin < 100
100
<
=
RPSmin < 115
115
<
=
RPSmin
SRK20, 25, 35
SRK50, 60
Outdoor air temperature (˚C)
When the outdoor air temperature (models SRK20, 25, 35 : TH3 ; models SRK50, 60 : TH2) is 22°C or lower continues
for 20 seconds while the compressor speed is other than 0 rps.
Compressor speed: Upper/lower limit (rps)
Upper 2Lower 2
Lower 1
Upper 1
Range ARange B
2624
Outdoor air temperature (Υ
)
603020
9112225
0322 25
Range A
Range B
70ReleaseSRK20, 25, 35
604535 75ReleaseSRK50, 60
1) It controls the upper and lower limit values for the compressor speed according to the following table.
2) It checks the outdoor temperature (models SRK20, 25, 35 : TH3 ; models SRK50, 60 : TH2) once every hour to
judge the operation range.
When either of the following condition is satisfied.
1) The outdoor air temperature (models SRK20, 25, 35 : TH3 ; models SRK50, 60 : TH2) is D°C or higher.
2) The compressor speed is 0 rps.
fanspeed fan
When the indoor heat exchanger temperature is in the range of A-B °C, if the compressor speed is been maintained and the operation has continued for more
than 20 seconds at the same speed, it returns to the normal heating operation.
B-C
C-D
48
48.5
48.5
48.5
48.5 - 40.1
40.1
53
56
56 - 52.5
52.5 - 50.8
50.8 - 42
42
55
58
58
58 - 56.2
56.2 - 47.3
47.3
58
61
61
61
61
61
ABCD
10
10
Temperature list
SRK50, 60
SRK20, 25, 35
ABCD
RPSmin < 50
RPSmin < 115
115
<
=
44 51 60
42 49 54 58
44
-
42 51
-
49 56
-
54 60
-
58
50
44 51 56 60
RPSmin < 120
120
<
=
ABCD
RPSmin < 50
115
<
=
45 52 54.5
43 50 55 58
45
-
43 52
-
50 57
-
55 60
-
58
45 52 57 60
58
RPSmin < 120
120
<
=
RPSmin
RPSmin
53.5
<
=
RPSmin < 115
50
<
=
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