Fig. 3.7 Alternative capacity control of compressor RC46W
Number of solenoid valves: 2 (A,B)
Number of control steps: 4
B
A
1
3
4
2
solenoid valves energized
-
B
-
B
ù
û
Electrical
control
- -
AA
25 50 75 100
% Capacity
No. of operating cylinders
--11
-2-2
--33
RC46W
(alternative)
4444
Fig. 3.6 Standard capacity control of compressor RC46W
A
1
3
4
2
solenoid valves energized
- A
ù
û
Electrical
control
50 100
% Capacity
No. of operating cylinders
-1
22
-3
RC46W
(standard)
44
Number of solenoid valves: 1 (A)
Number of control steps: 2
Refrigeration Division
Grasso
3. DESCRIPTION AND OPERATION
OF CAPACITY CONTROL
page C1.6 Installation and Maintenance Manual RC(U)6 v001.99.01.en