User Guide

ManualsBrandsCaleffi ManualsPlumbing SuppliesReplenishment Water Treatment Filling Unit

Replenishment water treatment filling unit

NA573

NA11310.03

www.caleffi.com

NA573022 ½” FNPT inlet x ½" FNPT outlet

NA573102 10" color changing demineralizing filter

The replenishment water treatment filling unit is an assembly consisting of a

backflow preventer, isolation valves, filter housing unit with replaceable resin

cartridge and AutoFill™ pre-adjustable fiill valve. This unit is installed on the

water inlet piping in sealed hydronic heating or cooling systems. Three important

functions are provided in this single filling unit assembly: maintaining the pressure

of the system stable at a set value and automatically filling up with water as

required; protecting drinking water systems from return flow, caused by back-

siphoning or back pressure of contaminated fluids; and producing from site-

sourced water, demineralized water of an ideal grade for use in closed hydronic

heating and cooling systems. Minerals causing hardness are almost entirely

eliminated. This prevents premature equipment malfunction including reduced

efficiency or component failure due to lime scale formation – a common

affliction of heat exchangers. Demineralized water is low in electrical conductivity

to minimize corrosion due to galvanic attack. Demineralized water eliminates the

variability of mineral content found in untreated site water which provides more

reliable dosing when chemical additives are used – such as glycol.

This item is designed for use in closed hydronic systems. Do not use in plumbing

applications. This item does not meet the low-lead plumbing standards of U.S. and

Canada.

NA573

Replenishment water treatment lling unit assembly, NA573022

Materials - body: plastic

- cover: plastic

- seals: rubber

Performance

Suitable ﬂuids: tap water

Max. inlet pressure: 125 psi (8.5 bar))

Max. working temperature: 100°F (38°C)

Max. ﬂow rate: 1 gpm (0.6 l/s)

Demineralization capacity for 180 ppm untreated water:

30 gallons

TDS of water after treatment: < 30 ppm

Resin exchange:

-Anion: 60%

-Cation: 40%

Connections - ½” FNPT inlet x ½" FNPT outlet

Product Range

Technical

Specifications

Function

Summary of content (8 pages)

PAGE 1
NA11310.03 www.caleffi.com Replenishment water treatment filling unit © Copyright 2019 Caleffi Function NA573 The replenishment water treatment filling unit is an assembly consisting of a backflow preventer, isolation valves, filter housing unit with replaceable resin cartridge and AutoFill™ pre-adjustable fiill valve. This unit is installed on the water inlet piping in sealed hydronic heating or cooling systems.
PAGE 2
Technical Filling unit Specifications Materials - body: - cover: - seals: brass PA 66 GF 30 NBR Performance Pressure setting range: Factory setting: Indicator accuracy: Pressure gauge scale: 3–60 psi (0.2–4 bar) 15 psi (1.035 bar) ±2 psi (±0.
PAGE 3
SAFETY INSTRUCTION / CONSIGNE DE SÉCURITÉ This safety alert symbol will be used in this manual to draw attention to safety related instructions. When used, the safety alert symbol means ATTENTION! BECOME ALERT! YOUR SAFETY IS INVOLVED! FAILURE TO FOLLOW THESE INSTRUCTIONS MAY RESULT IN A SAFETY HAZARD. Ce symbole d'avertissement servira dans ce manuel à attirer l'attention sur la sécurité concernant instructions.
PAGE 4
Construction details Isolation ball valves AutoFill™, code 553642A Backflow preventer, code 573403A Filter housing, code NA573100, with demineralizing cartridge, code NA573102 Most closed-loop hydronic systems lose small amounts of water and air over time. These losses come from automatic air purging of dirt separators, weepage at air vents, valve packings or circulator flange gaskets. Fluid loss also occurs when a component such as a circulator is replaced.
PAGE 5
Installation The Caleffi NA573 replenishment water treatment filling unit must be installed in accordance with the diagrams contained in this instruction sheet taking into account all the applicable local codes and regualtions. Before installing a Caleffi NA573 filling unit, the system must be thoroughly flushed to remove impurities or any debris which may have accumulated during installation. Failure to remove dirt or debris may affect system performance and the manufacturer's guarantee.
PAGE 6
Maintance The Caleffi NA573 assembly uses a special 10-inch cartridge insert, code NA573102, containing the color changing resin beads necessary to demineralize water passing through it at relatively low flow rates. The cartridge assembly can be isolated for replacement by closing the two ball valves. The clear housing can then be unscrewed to remove and replace the cartridge. The Caleffi cartridge will appear blue color when new.
PAGE 7
Cartridge change 1. Close the isolation ball valves. 2. Turn the cartridge with white plastic wrench included with unit. 3. Remove the used cartridge and discard them. 4. Insert the new cartridge. 5. Turn the cartridge and tighten in place with the white plastic wrench. 6. Re-open the isolation ball valves to return to normal operation. 1 2 3 4 White plastic wrench, included in package, is required to remove filter housing to replace spent color changing demineralization filter.
PAGE 8
Application diagram T T P T T PPM P TR T | | | | || | | 0 | psi BACKFLOW PREV | Series: 573 Sizes: 1/2” - 3/4” S/N || | | | | | ||| || 60 4 | || || | | ||| || | || | | | | | | | || | | | | bar | | | | || | | | | | ||| | | || | | | | || | | | | | || | | | | | | | | | || | || 15 | | | | | | | | | | | | || | 2 || | | | | | | 30 | F A VENT 45 F A Pump Ball valve FlowCal™ BALLSTOP Flow meter Thermometer T F Shut-off valve Temperature probe