Ferroli RPA 16, Installation And Operation Manual

Page: 27 / 48

27
To change the speed of the circulation pump, open the cover of the accumulation kit and set the selectors as shown
in the figure.
Unit
model
Speed
set
Recommen-
ded speed
30 liter accumulator
Speed
set
Recommen-
ded speed
34 liter accumulator
Speed
set
Recommen-
ded speed
60 liter accumulator
16
2 nd
19
1 st
2 nd
2
nd
2 nd
2
nd
2 nd
2 nd
2 nd
3
rd
24
30
38
42
50
USE OF ACCUMULATION KIT
Primary circuit in the unit
If the accumulation kit is used, the water flow towards the unit is guaranteed by the primary circulation pump, while
water circulation around the system is ensured by a second circulation pump as shown in the diagram on page 19.
Both circulation pumps are the three-speed type. These speeds can be selected during the installation phase to
suit plant requirements and the type of chiller used. The graphs on the next pages give the flow rate, head and
power draw values of the circulation pumps mounted in the respective accumulation kits.
The graphs give the head curves corresponding to the speeds set in the factory, plus the relative electric power
draws of the circulation pumps.
The speed selectors of the circulation pumps must be modified as indicated in the figure if different flow rates are
required.
The table gives the recommended speeds to suit the particular accumulation kit/chiller used.
Secondary circulation pump
Primary circulation pump