MU1H-1201GE23 R0116
4
Honeywell GmbH
GB
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
Spring loaded check valves have a moving seal disc which is
lifted off the seat by a greater or lesser amount depending on
the flow rate through the valve. If the flow falls towards zero,
then the spring pushes the disc back onto the seat and seals
the waterway.
To ensure continuing correct function it is recommended that
check valves be regularly checked and maintained (as speci-
fied in EN 1717).
3. Application
4. Technical data
5. Scope of delivery
The check valve comprises:
• Housing with test and drain plugs (
1
/
2
" device with
test plugs only)
• Check valve insert
• Union connector with internal thread
• Test and drain plugs
• Disc guide
• Spring
• Disc with lip seal ring
6. Options
7. Assembly
7.1. Installations Guidelines
• Install in horizontal pipework with test and drain plug down-
wards
- This position is best for draining
• Install shutoff valves
- Shutoff valves provide optimal serviceability
• Ensure good access
- Simplifies maintenance and inspection
• Install right after water meter if applicable
- Protects against backflow from water systems
7.2. Assembly instructions
1. Thoroughly flush pipework
2. Close shutoff valve on inlet
3. Release pressure on outlet side (e.g. through water tap)
4. Close shutoff valve on outlet
5. Fit check valve for example between water meter and
pressure reducing valve, filter or filter combination
• Note flow direction
• Install without tension or bending stresses
6. Slowly open shut off valves on inlet and outlet
8. Maintenance
8.1. Inspection
8.1.1. Check valve
1. Close shutoff valve on inlet
2. Open test valve
• Until the pressure is released, some water will flow out
of the test valve. After a short period of time the water
flow should stop. If the water continues to drip or run,
then the check valve must be replaced - see mainte-
nance of check valve
3. Close test valve again
4. Slowly open shutoff valve on inlet
8.2. Maintenance
8.2.1. Check valve
1. Close shutoff valve on inlet
2. Release pressure on outlet side (e.g. through water tap)
3. Close shutoff valve on outlet
4. Replace check valve
5. Slowly open shut off valves on inlet and outlet
Medium
Water
Liquid catagory 2 (no hazardous
material)
Operating pressure
max. 16 bar
Operating temperature
accord. DIN EN 13959
Water up to 65 °C
(short term up to 90 °C)
Opening pressure
ca. 0.05 bar
Connection size
1
/
2
" - 2"
RV280-... A =
Internal thread
Special Versions available on request
Connection size
Interval: once a year
To be carried out by an installation company