a) Connect the pilot line and air port of the first power and limit valve of
each group to its associated control line (I, II, III).
b) Follow the sequence of each group and connect the limit valves to
appropriate pilot lines of the power valves.
c) Connect the output of the last limit valve of each group to the pilot line
of the group selector valve.
d) Add any extra valves for safety, emergency and resetting purposes.