Mitsubishi SRK 25ZS-W, Техническое руководство

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76
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'18 • SRK-T-250
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'09•SRK-DB-087D
(g) Heating overload protective control
(i) Indoor unit side
1) Operating conditions :
2) Detail of operation :
3) Reset conditions :
(ii) Outdoor unit side
1) Operating conditions :
2) Detail of operation
3) Reset conditions:
(i) Operating conditions
(ii)
(ii)
Detail of operation
(h) Heating low outdoor temperature protective control
(iii)
(iii)
Reset conditions
-10 -8 -2 2
Lower limit 45 rps (model SRK35 : 55rps)
Lower limit 40 rps
Normal operation
Outdoor air temperature(°C
10 11 19 20
Normal operation
Protective control ON1
Protective control ON2
Outdoor air temperature(°C)
21 22
Normal operation
Protective
control
Outdoor air temperature(°C)
• Model SRK50
• Model SRK50
• Models SRK20, 25, 35
• Models SRK20 ~ 35
(i)
ࠉ
Operating conditions
When the outdoor air temperature (TH2) is lower than 4ºC or higher than 13ºC continues for 30 seconds while the
compressor speed is other than 0 rps.
ࠉ
Detail of operation
The lower limit compressor speed is change as shown in the figure below.
Model SRK50
A B C D
RPSmin < 40
40 <
= RPSmin < 80
80 <
= RPSmin < 90
90 <
= RPSmin < 102
102 <
= RPSmin
49
53
41
53 ~ 47
47 ~ 41
53
57
45
57 ~ 51
51 ~ 45
55
59
47
59 ~ 53
53 ~ 47
58
62
51
58
51
When the outdoor air temperature (TH2) is 22ºC or higher continues for 30 seconds while
the compressor command speed other than 0 rps.
a)
b)
c)
d)
Taking the upper limit of compressor command speed range at 60 rps, if the output speed obtained with the fuzzy
calculation exceeds the upper limit, the upper limit value is maintained.
The lower limit of compressor command speed is set to 40 rps and even if the calculated result becomes lower than
that after fuzzy calculation, the speed is kept to 40 rps. However, when the
thermo OFF, the speed is reduced to
0 prs.
rps.
1) Operating conditions :
2) Detail of operation
When the outdoor air temperature (TH2) is 11ºC or higher continues for 30 seconds while
the compressor command speed other than 0 rps.
a)
b)
c)
d)
Taking the upper limit of compressor command speed range at 78 rps, if the output speed obtained with the fuzzy
calculation exceeds the upper limit, the upper limit value is maintained.
The lower limit of compressor command speed is set to 30 rps and even if the calculated result becomes lower than
that after fuzzy calculation, the speed is kept to 30 rps. However, when the
thermo OFF, the speed is reduced
to 0 prs.
rps.
.
3) Reset conditions:
.
1)
2)
30
Protective
control
ON1
ON2
Item
Compressor command speed
Low limit
30 rps
30 rps
Upper limit
78 rps
51 rps It depends on compressor command speed
Outdoor fan speed
2nd
10
ࠉ
Reset conditions
When either of the following condition is satisfied.
1)
ࠉ
The outdoor air temperature (TH2) becomes 6ºC.
2)
ࠉ
The compressor speed is 0 rps.
When the outdoor air temperature (TH2) is lower than ˉ2°C or higher continues for 30 seconds while the compressor
speed is other than 0 rps.
The lower limit compressor speed is change as shown in the figure below.
Normal operation
Lower limit 27 rps
Lower limit 50 rps
Outdoor air temperature (°C)
4 6 -6 -8
(i) Compressor overheat protection
(i) Purpose
(ii) Detail of operation
1)
(Example)
Compressor speed
Discharge pipe temperature (˚C)
90 100 110
It is designed to prevent deterioration of oil, burnout of motor coil and other trouble resulting from the compressor overheat.