Brochure

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WATER TREATMENT FILLING UNITS
Replenishment water treatment lling unit,
demineralizes site water through a color
changing (indicates when to change)
demineralizing cartridge.
Max. inlet pressure: 125 psi.
Max. working temperature: 100°F.
Max. ow: 1 gpm.
TDS of water after treatment: < 30 ppm.
NA573
Code Description Lbs USD
NA573022* ½" FNPT 7.4
351.00
NA573100** Replacement filter housing assembly 3.4 159.00
NA573102 Replacement color-changing filter 1.0 81.40
Resin bags for NA570 HYDROFILL
™
in
reusable plastic pail.
Code Description Lbs USD
NA570971 Two resin bags for NA570912 22 424.00
NA570974 Four resin bags for NA570924 43 847.00
*Complete including back ow preventer, isolation valves, lter housing with resin cartridge and AutoFill
™
.
**Filter housing only. Includes color changing demineralizing cartridge.
Code Description Lbs USD
NA57094 Replacement twist-on lid 3 576.00
NA570 HYDROFILL
TM
replacement twist-on
lid.
NA570 HYDROFILL
TM
replacement parts.
Code Description Lbs USD
NA57092 Replacement internal inlet/outlet screens 1.5 52.70
NA57093 Replacement o-ring seal kit 0.1 84.90
Construction detail
Function
The replenishment water treatment lling unit is an assembly consisting of
a backow preventer, isolation valves, lter housing unit with replaceable
resin cartridge and AutoFill™ pre-adjustable ill 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 lling unit assembly: maintaining
the pressure of the system stable at a set value and automatically lling up
with water as required; protecting drinking water systems from return ow,
caused by back-siphoning or back pressure of contaminated uids; 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 efciency or component failure due to lime
scale formation – a common afiction 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.
Installation
The replacement water treatment lling unit must be horizontally installed
following the direction of ow as indicated by the arrow on the AutoFill™ or
573 backow preventer body. The replacement water treatment lling unit
is factory pre-assembled. Fittings may have loosened during shipping and
handle. Check the ttings and tighten accordingly.
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.
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