-
71
-
'19 • SCM-SM-276
(a) Operating conditions
When the outdoor air temperature (
Tho-A) is 22°C or lower continues for 20 seconds while compressor command speed is
other than 0 rps.
(b) Detail of operation
(i)
The lower limit of compressor command speed is set to
B
or
D
rps and even if the speed becomes lower than
B
or
D
rps, the speed is kept to
B
or
D
rps. However, when the thermostat becomes OFF, the speed is reduced to 0 rps.
(ii)
The upper limit of compressor command speed is set to
A
or
C
rps, the speed is kept to
A
or
C
rps.
22
25
OFF
0
3
Upper limit
C
rps
Lower limit
D
rps
ON
ON
Upper limit
A
rps
Lower limit
B
rps
Outdoor air temperature(°C)
26
24
Range
2
Range
1
Indoor air temperature(°C)
Item
Compressor speed
75
A
B
Release
30
1
2
60
C
40
Unit: rps
D
Values of A - D
(c) Reset conditions
When the either of the following conditions is satisfied
(i)
When the outdoor air temperature (
Tho-A) becomes 25°C or higher.
(ii)
When the compressor command speed is 0rps.
(4) Heating high pressure control
(a) Starting condition
When the indoor heat exchanger temperature (Th2 (Thi-R1)) has risen to a specified temperature while the compressor is
turned on.
(b) Operating condition
Compressor command speed is controlled according to the zones of indoor heat exchanger temperature as shown by the
following table.
Th2 < P1
P1
<=
Th2 < P2
P2
<=
Th2 < P3
P3
<=
Th2 < P4
P4
<=
Th2
Compressor speed (NP)
Normal
Retention
NP–4rps
NP–8rps
N=0
Sampling time (s)
─
20
20
20
─
Unit: °C
Th2
NP
P1
P2
P3
P4
10
<=
NP < 30
41
47
52
55
30
<=
NP < 31
41 – 45
47 – 52
52 – 57
55 – 61
31
<=
NP < 90
45
52
57
61
90
<=
NP < 120
45 – 43
52 – 45
57 – 48
61 – 50
120
<=
NP
43
45
48
50
(3) Cooling low outdoor temperature protective control
Summary of Contents for SRK60ZSX-W
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