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1. Safety Guidelines
1. Follow the installation instructions.
2. Use the appliance
• according to its intended use
• in good condition
• with due regard to safety and risk of danger.
3. Note that the appliance is exclusively for use in the appli-
cations detailed in these installation instructions. Any
other use will not be considered to comply with require-
ments 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.
2. Description of function
The filter insert comprises an upper part and a lower combi-
nation section. When in the „filtering" position, the small upper
filter is closed so that the water can only pass through the
main filter from outside to inside. When the ball valve is
opened for reverse rinsing, the filter is pushed downwards
until the water supply to the outer side of the main filter is
stopped. Simultaneously, the water flow is opened to the
upper part of the filter. The water needed for cleaning the filter
passes through the upper sieve, the rotating impeller and the
main filter from inside to outside. By this means, the filter is
fully cleaned over its whole surface area at the full inlet pres-
sure. The filter automatically switches over to the operating
position when the ball valve is closed again.
The filter combination combines reverse rinsing filter and
pressure reducing valve in one appliance.
The integral pressure reducing valve functions on a balanced
force principle whereby the force exerted by a diaphragm is
balanced against the force of an adjustment spring. The inlet
pressure has no influence on opening or closing of the valve.
Inlet pressure fluctuation does not therefore affect the outlet
pressure.
3. Application
Medium
Inlet pressure
Outlet pressure
The filter is constructed for drinking water installations. In case
of a process water application the filter has to be proven indi-
vidually.
For maintaining the measuring accuracy of the manometer, a
continuous maximum pressure load of 12.0 bar is recom-
mended.
Honeywell GmbH
Water
Max. 16,0 bar
1.5-6 bar adjustable
(nur FK74CS/FKN74CS)
GB
4. Technical data
Installation position
Operating pressure
Operating temperature
Connection size R with rota-
table connector piece
5. Scope of delivery
The filter combinations FK74CS and FKN74CS comprises:
• Housing with pressure gauge
• Spring bonnet
• Adjustment handle with cover cap
• Valve insert complete with diaphragm and valve seat
• Translucent filter bowl
• Fine filter
• Ball valve with drain connection
• Reverse rinsing handle
• Rotatable connector piece, flange sealings, connecting
nuts and fittings (FK74CS only)
• Memory ring
• Covers
• Wrench for filter bowl and spring bonnet
• Allen key WS6
The fine filters F74CS and FN74CS comprises:
• Housing with pressure gauge
• Translucent filter bowl
• Fine filter
• Ball valve with drain connection
• Reverse rinsing handle
• Rotatable connector piece, flange sealings, connecting
nuts and fittings (F74CS only)
• Memory ring
• Covers
• Wrench for filter bowl
• Allen key WS6
6. Options
with pressure reducing valve
FK74CS-...AA =
With rotatable connector piece, filter mesh
size 95/110 µm
FK74CS-...AC =
With rotatable connector piece, filter mesh
size 50 µm
FK74CS-...AD =
With rotatable connector piece, filter mesh
size 200 µm
Connection size
FKN74CS-1A =
Retrofit version without rotatable
connector piece, filter mesh size 95/
110 µm
FKN74CS-1C =
Retrofit version without rotatable
connector piece, filter mesh size 50 µm
9
Vertical or horizontal, with filter
bowl downwards
Min. 1,5 bar; Max. 16,0 bar
5 - 30 °C
1/2", 3/4", 1", 11/4"
MU1H-1156GE23 R1111
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