Honeywell NK300SOFT Product specification sheet
Construction
The refilling combination with softening unit consists of:
• integrated ball valve, inlet and outlet side
• Backflow preventer type BA with discharge valve, cartridge
insert, integrated dirt trap on the inlet side, backflow preventer
outlet side and three measuring points with sealing plugs
• Pressure reducing valve with pressure gauge
• Blending unit, consisting of water flow meter, outlet-sided
blocking capability and bleeder valve
• 3.5l cartridge with ionic exchange resin
• Total hardness test-kit to determine water hardness
Materials
• Dezincification-resistant brass housing
• Discharge valve, cartridge insert, valve insert, mechanical
components of the blending unit and spring bonnet made of
high-quality plastic
• Fibre-reinforced NBR diaphragm
• Seals in NBR and EPDM
EN0H-1546GE23 R0908 • Subject to change
• Spring steel adjustment spring
• Stainless steel fine filter mesh
• Polypropylene cartridge
NK300soft
Refilling combination with softening unit
for heating systems
Product specification sheet
Application
The softening unit of the Honeywell NK300soft facilitates the
softening of heating water according to VDI-guideleine 2035/I.
Limescale and thereby caused damages and malfunction in hot
water heating system (DIN EN 12828) are avoided efficiently.
The refilling combination fitted on the inlet and based on a
BA-type backflow preventer protects the potable water supply
against back flow of heating water according to DIN EN 1717.
Special Features
• Intergrated water meter simplify the determination of cartridge
exchange
• Easy exchange of cartridge without tools
• Constant connection with the drinking water supply in accordance with EN1717 by hose line or piping is possible
• Optimal protection of the drinking water supply system
• Backflow preventer approved for noise level protection,
class 2
• Pressure reducing valve approved for noise level protection,
class 1
• Pressure reducing valve with inlet pressure balancing - inlet
pressure fluctuation does not influence the outlet pressure
• Outlet pressure adjustable and directly at the pressure gauge
readable
Range of Application
Medium Water
Inlet pressure max. 10.0 bar
Outlet pressure 1.5-4 bar adjustable, preset to
1.5 bar
Liquid category Backflow
preventer BA
Suitable for heating systems with the following materials: steel,
copper, copper alloys and plastics.
Treated water has modified corrosive chemical parameters.
Conditioning by means of inhibitors is to be provided for separately.
Technical Data
Installation position horizontal pipework with discharge
Operating temperature max. 30 °C
k
-value 0.45 m3/h
vs
Connection ball valve
Backflow preventer
Connection size
Discharge
Connection size
4 (toxic, highly toxic, tumourigenic, radioactive materials)
connection directed downwards
1
/4"
G
HT 50
1
/2" External thread
www.honeywell.com 1
NK300soft Refilling combination with softening unit for heating systems
Method of Operation
In the first instance the water passes through the refilling combi-
L
l
1
h
1
h
3
H
Ø50mm
h
2
Connection size R
1
Weight kg 6
Dimensions mm
H524
h
1
h
2
h
3
450
162
L495
l
1
l
2
-value m3/h 0,45
k
vs
137,5
138
/2"
74
l
2
nation which protects the system against back flow of heating
water. It combines backflow preventer, pressure reducing valve
and ball valves in one appliance.
The backflow preventer changes to shut-off position (back pressure) if the differential pressure between middle- and inlet
chamber falls under 0.14 bar. The check valves are closed and
the discharge valve is opened.
The pressure reducing valve reduces the pressure on the inlet
side (admission pressure) to the level of the desired pressure on
the outlet side (outlet pressure) in individual cases.
Inlet pressure fluctuation does not influence the outlet pressure,
because the pressure reducing valves operate by means of a
force equalising system (inlet pressure balancing).
The softening unit, installed directly after the refilling combination,
works according to the ionic exchange principle and replaces the
alkaloids of soil such as calcium and magnesium with sodium
ions.
Dependant on the regional water hardness, the water is either
partially softened (<8°dH) or completely softened (<0,11°dH) by
adjusting the blending unit.
Options
NK300soft-1/2A = Standard version with threaded connec-
NK300soft-1/2AZ25 = Version with threaded connection R1/2"
1
tion R
/2" and 600µm filter in the refilling
combination
and 25µm filter in the refilling combination
TK295
ZR06K
2 www.honeywell.com
TKA295
3x
WS300NK
3x
Accessories
TK295 Test kit
Electronic pressure measuring device with digital indicator, battery-operated.
With case and accessories, ideal for inspection and
maintenance of backflow preventer type BA.
TKA295 Test kit
Analogue pressure measuring device with differential
pressure display.
With case and accessories, ideal for inspection and
maintenance of backflow preventer type BA.
ZR06K Double ring spanner
For removal of spring hood and filter bowl
WS300NK Maintenance set
Maintenance set for refilling combination NK300 for
use with TK295 resp. TKA295
EN0H-1546GE23 R0908 • Subject to change
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