Product Overview

Replenishment water treatment filling unit
NA573
Function
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.
Product range
NA573022 Replenishment water treatment filling unit, includes backflow preventer, isolation valves and AutoFill™......................................................
connections ½” NPT female inlet and outlet
NA573100 Filter housing complete with color changing resin demineralization cartridge.............connections ½” NPT female inlet and outlet
NA573102 10” color changing demineralizing filter
Technical specifications
Materials
Body: plastic
Ball: 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)
TDS of water after treatment: < 30 ppm
Resin exchange:
-Anion: 60%
-Cation: 40%
Connections
Main connections: ½” NPT female inlet and outlet
CALEFFI
003
FM 21654
16
1
/8
12”
8”
4 ½”
dia
19”
7
3
/8
Dimensions
01268/19 NA
Replaces 01268/16 NA

Summary of content (4 pages)