Assembly; Installation; Assembly Instructions (Fig. 1); Commissioning - Honeywell NK298S Einbauanleitung

• Complete pressure reducing valve with valve insert
(incl. diaphragm and valve seat), spring hood (incl.
adjustment screw), adjustment spring, filter bowl,
fine filter (mesh size approx. 0,16 mm) and ma-
nometer

6. Assembly

6.1 Installation

It is necessary during installation to follow the installa-
tion instructions, to comply with local requirements and
to follow the codes of good practice.
The installation location must be protected against
frost and be easily accessible.
The installation location must be ventilated well.
The installation may not take place in areas or ducts
where poisonous gases or vapours may be present or
where flooding can occur.
The installation is independent of the highest possible
water level.

6.2 Assembly instructions (fig. 1)

CAUTION!
To avoid stagnating water the refilling combina-
tion must be attached as directly as possible to
the service pipe!
The rules of the drinking water regulation must
be considered during the assembly!
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.
• Provide a straight section of pipework of at least
five times the nominal size after the refilling
combination.
3. Attach drain pipe to discharge connection (plastic
pipe HT 50).

7. Commissioning

7.1 Backflow preventer (fig. 2)

Slowly open ball valves on inlet and outlet.
Fill and deaerate system.
1. Remove closing caps.
Open ball valve until water discharge.
2. Close ball valves.
Attach closing caps.
Honeywell GmbH
GB
By occasional inlet pressure fluctuation dripping
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water can escape from the discharge connec-
tion!
This is not a malfunction and thus no cause for
a complaint!

7.2 Pressure reducing valve (fig. 2)

7.2.1 Setting outlet pressure
The pressure reducing valve is set by factory to
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1,5 bar.
1. Close ball valve on inlet.
2. Slacken tension in compression spring.
Turn slotted screw to the left (-).
3. Release pressure on outlet side (e.g. through water
tap).
4. Close ball valve on outlet.
5. Slowly open ball valve on inlet.
6. Setting outlet pressure.
Turn slotten screw until the manometer shows the
desired value.
7. Slowly open ball valve on outlet.
8. Refilling combination is ready for use.

8. Maintenance

We recommend a scheduled maintenance con-
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tract with a qualified service provider
In accordance with DIN EN 1717 a regular mainte-
nance must be taken.

8.1 Inspection

8.1.1 Backflow preventer
CAUTION!
Maintenance from backflow preventer should
only be carried out by authorised personnel!
Frequency: at least every six month (depending
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on local operating conditions)
To be carried out by an installation company
We recommend the following test kits
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• TKA295
• TK295
Consider the operating instructions of the test
kit!
8.1.2 Pressure reducing valve
Frequency: once annually
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To be carried out by an installation company
To be carried out by the operator
1. Close ball valve on outlet.
2. Check outlet pressure with manometer or pressure
measuring device when no flow is occurring.
8 MU1H-1229GE23 R0905