Honeywell Home NK300SE-VE Product Specification Sheet

EN0H-1561GE23 R0219

Boiler Room Valves

NK300SE-VE

Refilling combination with heatwater
treatment unit and demineralisation cartridge

APPLICATION

The demineralisation unit of the Honeywell NK300SE-VE
facilitates the demineralisation of heating water according
to VDI-guideline 2035, sheet 1 and 2. Lime scale and
thereby caused damages and malfunction in hot water
heating system (EN 12828) are avoided efficiently.

The refilling combination fitted on the inlet and based on a
BA-type backflow preventer protects the drinking water
supply against back flow of heating water according to
EN 1717.

SPECIAL FEATURES

• Integrated electronic smart monitoring system

simplifies the determination of cartridge exchange

• Easy installation, programming and exchange of

cartridge without tools

• Permanent connection with the drinking water supply in

accordance with EN 1717 by hose line or piping is
possible

• Optimal protection of the drinking water supply system

• Pressure reducing valve with inlet pressure balancing -

inlet pressure fluctuation does not influence the outlet
pressure

• Outlet pressure adjustable and directly visible on the

pressure gauge

TECHNICAL DATA

Media

Medium: Water

Freshwater hardness range*: 0°dH-26°dH

0°fH-46,4 °fH
0 mmol/l - 4,64 mmol/l

Connections/Sizes

Connection size discharge: HT40

Connection size:

Connection ball valve
backflow preventer:

Pressure values

Max. inlet pressure: 10 bar

Outlet pressure: 1.5 - 4 bar

Preset outlet pressure: 1.5 bar

Operating temperatures

Max. operating temperature
medium:

1

/2" external thread

G 1/4"

30 °C

Specifications

Liquid category backflow
preventer BA:

Installation position: horizontal pipework with

* In order to estimate the capacity of the cartridge for fresh water hardness >
26°dH/46,4 °fH/4.64 mmol/l a manual calculation method has to be used.
(see Installation Manual of the P300 cartridges incl. in the packaging of the
cartridges)

4 (toxic, highly toxic,
tumourigenic, radioactive
materials)

discharge connection
directed downwards

Suitable for heating systems
with the following materials:
aluminium, aluminium
alloys, steel, copper, copper
alloys and plastics.

Treated water has modified
corrosive chemical
parameters. Conditioning by
means of inhibitors is to be
provided for separately.

Product Specification Sheet • EN0H-1561GE23 R0219 • Subject to change 1

NK300SE-VE - Refilling combination with heatwater treatment unit and demineralisation cartridge

CONSTRUCTION

Overview Components Materials

1 42

1 Integrated isolation valve,

3

15

6

7

inlet and outlet side

2 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

3 Pressure reducing valve with

pressure gauge

4 Integrated electronic smart

monitoring system

5 Bleed valve
6 Insulation shells EPP
7 Demineralisation cartridge Polypropylene

Not depicted components:

Adjustment spring Spring steel

Seals NBR, EPDM

Diaphragm Fibre-reinforced EPDM

Discharge valve, cartridge
insert, valve insert,
mechanical components of
the refilling unit and spring
bonnet

Hardness test-kit to
determine water hardness

Fine filter mesh Stainless steel

Dezincification-resistant
brass

High-quality plastic

METHOD OF OPERATION

In the first instance the water passes through the refilling
combination 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 inlet pressure to the
desired set-pressure on the outlet side.

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 heatwater treatment unit (VE300S) installed directly
below the refilling combination (NK300S) uses the ionic
exchange principle to demineralise water and extracts all
minerals from the water. Thereby the electric conductivity of
the filling water is reduced.

TRANSPORTATION AND STORAGE

Keep parts in their original packaging and unpack them
shortly before use.

The following parameters apply during transportation and
storage:

Parameter Value

Environment: clean, dry and dust free

Min. ambient temperature: +5 °C

Max. ambient temperature: +40 °C

Min. ambient relative humidity: 25 % *

Max. ambient relative humidity: 75 % *

*non condensing

2 Product Specification Sheet • EN0H-1561GE23 R0219 • Subject to change