Product Overview

ManualsBrandsCaleffi ManualsBoiler Fill Valves3/4" PEX Crimp AutoFill Filling Valve

VENT

Installation

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 shut-off 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 shut-off valve while keeping the outlet

shut-off 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 shut-off valve while keeping the outlet shut-off 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, open

the outlet shut-off valve, ﬁlling the system.

6. The system will begin ﬁlling in fast-ﬁll mode, then automatically stop

ﬁlling when system pressure reaches the setting value. Thereafter,

the internal mechanism will automatically control system pressure to

the desired value.

Maintenance

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.

3 5

Code 535004

Code NA10273