Fig. 3.8 Standard capacity control of compressor RC66W
solenoid valves energized
-
-
B
ù
û
Electrical
control
-
A
A
33.3
66.6
100
% Capacity
No. of operating cylinders
-
-
1
-
2
2
3
3
3
-
-
4
-
5
5
RC66W
6
6
6
Number of solenoid valves: 2 (
A
,
B
)
Number of control steps: 3
A
B
1
3
4
5
6
2
Fig. 3.9 Standard capacity control of compressor RC86W
solenoid valves energized
-
-
-
C
ù
ú
û
Electrical
control
-
B
B
B
-
-
A
A
25
50
75
100
% Capacity
No. of operating cylinders
-
-
-
1
-
2
2
2
-
-
3
3
4
4
4
4
-
-
-
5
-
6
6
6
-
-
7
7
RC86W
8
8
8
8
Number of solenoid valves: 3 (
A
,
B
,
C
)
Number of control steps: 4
A
C
B
1
3
4
5
6
7
8
2
Refrigeration Division
Grasso
3. D ES C RI PT IO N AN D OP ER AT IO N
OF CA PA CI TY C ON TR OL
v001.99.01.en
Installation and Maintenance Manual RC(U)6
page C1.7
