Honeywell FN74C Einbauanleitung Seite 7

7. Assembly
7.1 Installations Guidelines
• Install in horizontal or vertical pipework with filter bowl
downwards
o This position ensures optimum filter efficiency
• Install shutoff valves
• Ensure good access
o Pressure gauge can be read off easily
o Degree of contamination can be seen with clear filter
bowl
o Simplifies maintenance and inspection
• The installation location should be protected against frost
• Fit immediately after water meter
o Corresponds to DIN 1988, Part 2
• It is recommended that a straight section of pipework at
least five times the nominal valve size is provided after the
filter combination
7.2 Assembly instructions
1. Thoroughly flush pipework
2. Install rotatable connector piece
o Note flow direction
o Install without tension or bending stresses
When connecting to an existing flange of another
make ensure that the inlet flow is through the outer
ring of holes. If this is not so, the whole connection
piece must be installed the other way round, even if
the arrow does not then indicate the actual flow
direction. If the flange is threaded, the threaded
holes must be drilled out to a diameter of 6.3 mm.
3. Install filter to rotatable connector
4. Seal in pressure gauge
7.3 Discharge of reverse rinsing water
The reverse rinsing water must be routed to the drain channel
in such a way that no backwater can occur.
To do this there are 3 options:
1. Direct connection:
o Connector DN 50/70 as well as the necessary pipes and
siphon (3 elbows 90°) in DN 70.
2. Discharge into floor drain
3. Drain into open container.
Filter size Reverse rinsing volume*
3/4" 12 litre
1" and 1 1/4" 15 litre
*at 4 bar inlet pressure and 3 x 3 seconds reverse rinsing
duration
MU1H-1149GE23 R0710
GB
8. Commissioning
8.1 Setting outlet pressure (FK74C/FKN74C only)
Set outlet pressure min. 1 bar under inlet pressure.
1. Close shutoff valve on inlet
2. Release pressure on outlet side (e.g. through water tap)
3. Close shutoff valve on outlet
4. Loosen slotted screw
o Do not remove slotted screw
5. Slacken tension in compression spring
o Turn control handle to the left (-) until it does not move
any more
6. Slowly open shutoff valve on inlet
7. Turn adjuster knob until the manometer shows the desired
value.
8. Retighten slotted screw
9. Slowly open shutoff valve on outlet
8.2 Reverse rinsing
During reverse rinsing, an inlet pressure of at least 1.5 bar is
required. The reverse rinsing interval depends on the degree
of dirt in the water. At the latest every 2 months, reverse
rinsing should be carried out according to DIN 1988, Part 8.
To ensure convenient and regular adherence to the reverse
rinsing interval, we recommend installing an automated
reverse rinsing system Z74S / Z74A (see accessories).
Filtered water can also be tapped during reverse
rinsing.
8.2.1 Manual reverse rinsing
If reverse rinsing water is not to be discharged via a direct
connection, a collecting container must be positioned
beneath before reverse rinsing.
1. Open ball valve by turning the reverse rinsing button to the
stop point
o Select bar must be upright
o The patented reverse rinsing system starts
2. Close ball valve again after approx. 3 seconds. Repeat
procedure three times
o If the filter is extremely dirty, the procedure may have to
be repeated additional times
With aid of the memory ring, the next deadline for manual
reverse rinsing can be booked.
8.2.2 Automatic reverse rinsing
The automated reverse rinsing system Z74A resp. Z74S is
available as an accessory. The automated system reliably
takes over reverse rinsing of the filter at intervals which can
be set between 4minutes and 3months. (Z74A) resp. at a
fixed intervall of 45 days (Z74S).
7 Honeywell GmbH