INSTRUCTIONS MANUAL AUTOMATIC FILTERS
FC/D-DP -FAC/D-DP
s.r.l.Milano - ITALY
Page 8 of 21
fcd-dp_mi-r2.doc –
r.2
4.4. Hydraulic connections
(see DRAWINGS installation and components)
In order to avoid shut-off during maintenance operations, an emergency by-pass line
should be provided
•
Complete the line from inlet fittings to the raw water line.
•
Complete the line from outlet fittings (valve V2) to the treated water line.
•
Connect the drain valves (V1 and V5) to a floor drain. The gate valve mounted downstream
of the valve V5 will be used to adjust the backwash flow rate.
A common flexible pipe made in plastic or rubber can be used for the drain line; its diameter
must be of at least one size larger of the one mentioned on “CHARACTERISTICS FOR
EACH MODEL” table.
It is suggested the drain line could be inspected in order to check quantity and quality of
drain water, as well as any leakage of media filter from the unit.
•
Connect the inlet air fitting, placed on the base manifold of the solenoid valves, to a
compressed air-mains, complete with pressure reducer, dehumidifier filter and shut-off valve.
The air pressure must be kept at value equal or higher of the pressure of water to be treated,
with max value of 8.0 bar.
•
Whether water is used to pilot the valves, the inlet fitting of the base manifold of the solenoid
valves must be connected to the pilot water fitting (¼"), pre-arranged on the inlet manifold of
the column; run to the drain a pipe from the drain fitting (¼") of the base manifold of the
solenoid valves.
•
Complete the line between the outlet fitting of each solenoid valve to the correspondent
membrane valve:
SOLENOID VALVE MEMBRANE VALVES
Solenoid
v. no.
TYPE no. TYPE
1NC V1 NC
2NC V2 NA
3 NC V3-V4-V5 NC-NA-NC
All the solenoid valves can be hand-driven by the lever placed at the base of each of them; the
turning of the lever simulate the action of the coil. Then, for valves NC type, the valve is closed
when the lever is on parallel to the base; it is opened when the lever is on perpendicular to the
base itself.
DUAL arrangement only :
•
the hydraulic connections must be made for both columns
•
each group of pilot solenoid valves (E1A-E2A-E3A / E1B-E2B-E3B) is coupled to its own
filtering columns (A/B)
•
put in the 2 pressure sensors on the inlet and outlet manifolds of the 2 columns (see
transducers drawing)
