Maintenance - Honeywell NK295C Installation Instruction

o Simplified maintenance and cleaning
o Pressure gauge at the pressure reducing valve
can be read off easily
• Provide a straight section of pipework of at least five
times the nominal valve size after the pressure redu-
cing valve (in accordance with DIN 1988, Part 5)
• The refilling combination has an integrated strainer
- no separate strainer necessary
o Refilling combination is protected against
malfunction and corrosion damage resulting from
ingress of foreign bodies, e.g. welding beads,
sealing materials, metal cuttings and rust
6.2 Assembly instructions
To avoid stagnating water, the refilling combina-
tion must be connected as directly as possible to
the supply line!
The guidelines of drinking water regulations
apply for installation!
1. Thoroughly flush pipework
2. Remove the isolation shell
3. Install refilling combination
• Install in horizontal pipework with discharge connec-
tion directed downwards
• Note flow direction (indicated by arrow)
o Install without tension or bending stresses
4. Attach drain pipe to discharge connection (plastic
pipe HT 40)
5. Install isolation shell
7. Commissioning
7.1 Setting outlet pressure
1. Close shut off valve on inlet and outlet
2. Slacken tension in compression spring
o Insert the available adjuster knob and turn to the
left
3. Open and close drain cock at the shut off ball valve
downstream.
Pressure reducing valve is decompressed.
4. Slowly open shutoff valve on inlet
5. Turn adjuster knob until the manometer shows the
desired value.
6. Remove adjuster knob
7. Slowly open shutoff valve on outlet
MU1H-1548GE23 R0609
GB

8. Maintenance

We recommend a planned maintenance
contract with an installation company
In accordance with DIN EN 1717 a regular mainte-
nance must be taken.
8.1 Inspection
8.1.1 Pressure reducing valve
Interval: once a year
To be carried out by an installation company or
the operator.
1. Close ball valve on the outlet side of the refilling
combination
2. Check outlet pressure on pressure gauge when no
flow is occurring
o If the pressure is increasing slowly, the valve may
be dirty or defective. In this instance, carry out
servicing and cleaning
3. Slowly open the ball valve on the outlet side of the
refilling combination
8.1.2 System disconnector
Interval: once a year
To be carried out by an installation company or
the operator.
1. Close shutoff valve on inlet
2. Open the drain point on the inlet side of the shut-off
ball valve.
o If the differential pressure between middle and
inlet chambers is less than 10 % of the inlet pres-
sure, the system disconnector moves into discon-
nect position (back suction). The inlet side
backflow preventer closes and the discharge
valve opens.
Does not open the discharge valve Replace refil-
ling combination!
3. Close the drain point on the inlet side of the shut-off
ball valve
4. Slowly open shutoff valve on inlet
6 Honeywell GmbH