-
41
-
'11 • SCM-SM-110
1) Start condition:
When the high pressure sensor (HPS) has risen to a specified pressure while the compressor is
turned on.
2) Compressor command speed is controlled according to the zones of high pressure sensor as
shown by the following table.
HPS < P2
P2
<
=
HPS < P3 P3
<
=
HPS P4
<
=
HPS
Protection control speed (NP)
Normal Retention NP
－
8rps 0rps
Sampling time (s)
Normal 30 20 Normal
(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:
①
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 thermo becomes OFF, the speed is reduced to 0 rps.
②
The upper limit of compressor command speed is set to A or C rps, the speed is kept to A or C rps.
(c) Reset conditions:
When the either of the following condition is satisfied
①
When the outdoor air temperature (Tho-R) becomes 25°C or higher.
②
When the compressor command speed is 0rps.
(4) Cooling low outdoor temperature protective control
◆
Model SCM100, 125
HPS
NP
P2 P3 P4
20
<
=
NP < 30
2.94 – 3.45 3.07 – 3.85 3.15 – 4.05
30
<
=
NP < 90
3.45 3.85 4.05
90
<
=
NP < 100
3.45 – 3.25 3.85 – 3.60 4.05 – 3.81
100
<
=
NP < 110
3.25 – 3.07 3.60 – 3.33 3.81 – 3.53
110
<
=
NP
3.07 3.33 3.53
Unit: MPa
To Next Page
Loading...
Need help?
General
