User Guide

This

model is

equipped

with a

pressure

setting indicator

for the

commissioning

operation. The

system charge

pressure can be

input by means of

the adjusting screw,

before the start of the

system filling phase.

Construction details

Pre-calibration

psi

bar

The cartridge containing the operating mechanisms, protected by a

large surface area strainer, is removable. This makes it very easy and

quick to carry out inspections, internal cleaning and even replacement

of the cartridge itself. Water intake is proportional to the air vented from

the system.

1. Filling unit can be installed in either horizontal or vertical position. It is,

however, vital that the unit is not installed upside down.

2. The special method of mechanical pre-adjustment with pressure setting

indicator makes it possible to set the unit to the required value in the system

before the beginning of the filling phase.

3. The unit is normally set at a pressure not less than that obtained by

adding the hydrostatic pressure and 4 psi (0,3 bar).

4. During filling, the internal mechanism will automatically regulate the

pressure until it reaches the required value, without the need to oversee

the filling operation itself. This prevents the system being charged to a

higher pressure than required.

5. Given the pre-calibrating function, the presence of the downstream

pressure gauge is not essential.

6. When the system is filled, the shut-off valve can be closed. In order to

restore the automatic topping-off condition, merely re-open the valve. The

pressure in the system will gradually return to the set pressure.

Removable filter

cartidge

Installation