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1.
Safety Instructions
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 oth-
er use will not be considered to comply with requirements.
4. All assembly operations should be carried out by compe-
tent and authorised personnel.
5. Immediately rectify any malfunctions which may influence
safety.
2.
Functional description
The non return valve is a safety device in accordance with
DIN EN 1717 to protect systems against back pressure, back
flow and back syphonage of non-potable water into service
pipe, plants and equipments.
The non return valve protected the service pipe.
The spring loaded non return valve has a moving seal disc
which is lifted off the seat by a greater or lesser amount de-
pending 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.
3.
Application
Medium
Water
Liquid category
2 (no hazardous materials)
4.
Technical data
Installation position horizontal pipework with test plugs
directed downwards
Admission pressure max. 16 bar
Operating pressure max. 70°C (short term 90°C)
Connection sizes
1/2" to 2" (threaded and soldering con-
nections)
ø15 und ø22 (compression connection)
5.
Scope of delivery
The non return valve consists of:
•
Housing
•
Connections (Design A,B and K)
•
Non return valve cartridge (DVGW approved)
•
Test plugs with sealing ring
6.
Assembly
6.1 Installation
It is necessary during installation to follow the installation in-
structions, to comply with local requirements and to follow the
codes of good practice.
•
The installation location should be protected against frost
and be easily accessible.
Shut off valves should be fitted on each side of the non return
valve.
6.2 Assembly instructions
1. Thoroughly flush pipework.
2. Close shut off valves on inlet and outlet.
Honeywell GmbH
GB
3. Install non return valve.
•
Install in horizontal pipework with test plugs directed
downwards.
•
Note flow direction (indicated by arrow).
•
Install without tension or bending stresses.
4. Slowly open shut off valves on inlet and outlet.
7.
Commissioning
•
No commissioning work are required
i
8.
Maintenance
We recommend a planned maintenance contract
i
with an installation company
In accordance with DIN 1988, part 8; the following measures
must be taken:
8.1 Inspection
Frequency: once annually
i
To be carried out by an installation company
To be carried out by the operator
1. Close shut off valve on inlet.
CAUTION!
Only open test plug if shut off valve on inlet has been
closed!
2. Open test plug in inlet.
Until pressure relief some water will emit from test plug.
CAUTION!
Water drips or keeps running continues ☞ Non
return valve cartridge is contaminated or worn!
Replace non return valve!
3. Close test plug on inlet.
4. Slowly open shut off valve on inlet.
9.
Disposal
The non return valve consists of:
•
Brass
•
Steel
•
Plastic
Observe the local requirements regarding correct
waste recycling/disposal!
10. Troubleshooting
Disturbance
Cause
Too little or no
Shut off valves up- or
water pressure
downstream of the Y
strainer are not fully
open
Non return valve car-
tridge is faulty
3
Remedy
Open the shut off
valves fully
Check function non
return valve (☞
chapter 8.1) or
replace
MU1H-1228GE23 R0205
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