Brochure
2
3
5
Installation
1. The AutoFill
™
valve can be installed in either horizontal or vertical
position. Donot install the valve upside down.
2. Before filling the system, use a screwdriver to turn dial to the intended
system pressure. A downstream pressure gauge is not required.
3. During filling, the internal mechanism will automatically control the
pressure until it reaches the required value, without monitoring the
filling operation itself. This prevents the system being charged to a
higher pressure than required.
4. When the system is filled, the shut-off valve can be closed. In order
to restore the automatic “topping-off function”, simply re-open the
shut-off valve. The pressure in the system will gradually return to the
set pressure.
Backflow preventer
The backflow preventer with atmospheric vent is designed to protect
drinking water systems from the return, caused by backsiphonage or
backpressure, of contaminated fluids. The Caleffi 573 series has been
specifically certified to standards CSA B64.3 and ASSE 1012.
Installation
The backflow preventer 573 series must always be installed horizontal
with the vent directing downward for natural flow of exhaust fluids, as
shown in the above figure. The only exception is it can be installed vertical
but 'nose down', that is with the outlet connection (A) pointingdownward.
It is highly recommended to install a strainer ahead of the inlet to the
backflow preventer for increased debris-free operatinglife.
Flow rate graph
Maintenance
For cleaning, inspection or
replacement of the entire cartridge,
use the following procedure.
1. Isolate the unit.
2. Open the lower control knob.
3. Unscrew the adjusting screw until
it stops.
4. Remove the upper cover.
5. Remove the cartridge using pliers.
6. The entire unit, after inspection,
can be reassembled or replaced
using a spare cartridge, code
F59650.
7. Re-adjust following the steps listed
in the installation section.
A
10
2
5
10
5
20
50
∆p (psi)
G
(l/min) (
gpm
)
20
10
5
(psi) (bar)
20
1
0
.5
10
2
5
15
1
0.5
0.3
Cv = 0.7