VENT
Removable self-contained cartridge
The cartridge, containing the diaphragm, strainer, seat, valve port and compensating piston, is pre-assembled as a “self-contained unit” with a cover
and can be easily removed for inspection and maintenance procedures.
1. Filling valve can be installed in either horizontal or vertical position.
Do not install upside down. Do not install outdoors.
2. Caleffi recommends the AutoFill 5350 series filling valve be installed
with separately-purchased shutoff ball valves, code NA39589,
upstream and downstream.
3. The AutoFill 5350 series filling valve does not have an internal check
valve to prevent reverse flow of water. For this reason, a backflow
preventer installed upstream is recommended. Use a Caleffi code
573503A, or other brand that complies with applicable codes.
4. The system pressure is factory pre-set to 15 psi (1.035 bar).
a. To properly reset to a higher desired system pressure
(greater than 15 psi), start by opening the inlet shutoff valve while
keeping the outlet shutoff valve closed. Adjust the operating knob
clockwise (+) to increase the system pressure to the desired value
as indicated on the outlet gauge, approximately 7 psi per revolution.
b. To reset to a lower system (lower than 15 psi), turn the operating
knob counterclockwise (-) until it stops turning, 0 psi. Then, open the
inlet shutoff valve while keeping the outlet shutoff valve closed. Adjust
the operating knob clockwise (+) to increase the system pressure to
the desired value as indicated on the outlet gauge, approximately 7
psi per revolution.
5. When the desired system pressure is indicated on the gauge, slowly
open the outlet shutoff valve, filling the system.
6. During the filling, in fast-fill mode, the valve will automatically control
the system pressure until it reaches the desired value, without the
need to monitor the filling operation itself. After installation, the internal
mechanism will automatically control system pressure to the desired
value.
VENT
VENT
Installation
When checking, cleaning or replacing the complete regulating cartridge:
1. Isolate the filling valve.
2. The special construction of the filling unit does not require any adjustment
of the system pressure, which can be left at the set value.
3. Remove the upper cover. The upper cover is integral with the internal
regulating cartridge.
4. Check and clean the filter.
5. When the cartridge is screwed back into the body, the pressure setting
will return to the original value.
6. Reopen the shut-off valves. The pressure will return to the original set
value.
Maintenance
3 5
