Honeywell NK300s Instrucciones De Instalación página 2

NK300S BOILER FEED COMBINATION
force of the spring causes the valve to open. The outlet
pressure then increases until the forces between the
diaphragm and the spring are equal again.
The inlet pressure has no influence on the regulation
of the pressure reducing valve. Inlet pressure
fluctuation does not influence the outlet pressure,
thus providing inlet pressure balancing.
In order to prevent an uncontrolled refill of the heating
system, the shut off valve must be closed after the
filling procedure.
The refilling combination consists of:
• Shut off valve, up- and downstream.
• Dual check backflow preventer with discharge
connection, valve cartridge (incl. integrated check
valve and discharge valve, upstream), integrated
strainer upstream (mesh size approx. 200micron),
check valve downstream and three test points.
• Pressure reducing valve with valve insert (incl.
diaphragm and valve seat), spring bonnet (incl.
adjustment screw), adjustment spring and pressure
gauge.
INSTALLATION
When Installing this Product...
1. Follow the installation instructions.
2. Use and install the appliance.
• According to its intended use.
• In good condition.
• With due regard to safety and risk of danger-
according to local codes & standards.
3. Note that the appliance is exclusively for use in
the applications detailed in these installation
instructions. Any other use will not be
considered to comply with requirements and
would invalidate the warranty.
4. Please take note that any assembly,
commissioning, servicing and adjustment work
may only be carried out by authorized persons.
5. Immediately rectify any malfunctions which may
influence safety.
6. Press connections, use press tools and
installation practices compatible with Viega
systems.
Assembly
Installations Guidelines
It is necessary during installation to follow the
installation instructions, to comply with local
requirements and to follow the codes of good practice.
• Install in horizontal pipework with discharge
connection directed downwards.
• The installation may not take place in areas or
ducts where poisonous gases or vapors may be
present or where flooding can occur.
• The installation environment should be protected
against frost and ventilated well.
CAUTION
The device shall not be installed in a
concealed or inaccessible location or where
the venting of water from the device during
its normal functioning may be objectionable.
33-00339EFS—01
• The installation location has to be easily accessible:
— Simplified maintenance and cleaning.
— Pressure gauge at the pressure reducing valve
can be read easily.
• Provide a straight section of pipework of at least
five times the nominal valve diameter after the
pressure reducing valve.
• The refilling combination has an integrated strainer
- no separate strainer necessary.
— Refilling combination is protected against mal-
function and corrosion damage resulting from
ingress of foreign bodies, e.g. welding beads,
sealing materials, metal cuttings and rust.
• The national installation codes & regulations must
be observed during the assembly.
Assembly instructions
NOTES:
— To avoid stagnating water the refilling combi-
nation (NK300S) must be attached as directly
as possible to the service pipe!
— The rules of the drinking water regulation must
be considered during the assembly! Fasten the
plastic sealing plugs manually only (without
tools)
1. Thoroughly flush pipework.
2. Install refilling combination.
• Install in horizontal pipework with discharge
connection directed downwards.
• Note flow direction (indicated by arrow).
• Install without tension or bending stresses.
3. Provide a straight section of pipework of at least
five times the nominal size after the refilling
combination.
4. Attach drain pipe to discharge connection
following local codes & standards.
Start-up
Filling up the system
1. Slowly open shut off valves on inlet and outlet.
Due to casual fluctuation of pressure during sys-
tem fill up, dripping water at discharge valve can
occur.
Setting outlet pressure
Pressure reducing valve is set to 15psi (1bar) by
factory.
The pressure of the supply system should be at least
30psi (2bar) above the set outlet pressure.
2
1
1
−
1. Close shut off valve on inlet and outlet.
2. Release pressure on outlet side.
• E.g. loosen the pressure gauge.
• Afterwards screw in pressure gauge again.
3. Slacken tension in compression spring.
• Turn adjustment handle counter clockwise (-)
until it does not move any more.
4. Slowly open shutoff valve on inlet.
2
4
+
3
6
−
5
M36864