Product Overview
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 (round knob on bottom)
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.
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 shut off valve.
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
Replacement parts
NA10363
Replacement gauge 0-60 psi/0-4 bar, ¼" NPT
F59650
AutoFill™ 553 series replacement cartridge
NA10197
AutoFill™ clear plastic disc cover