Honeywell GmbH
7
MU1H-1234GE23 R0812
GB
8. Maintenance
8.1 Inspection
8.1.1 Testing discharge valve
1. Procedure according to instruction of the test control
unit TKA295 resp. TK295
8.1.2 Testing outlet check valve
1. Procedure according to instruction of the test control
unit TKA295 resp. TK295
8.2 Maintenance
In accordance with DIN EN 1717 a regular mainte-
nance must be taken.
8.2.1 Cartridge insert
1. Close shut off valve on inlet
2. Release pressure on outlet side (e.g. through water
tap)
1. Close shut off valve on outlet
2. Remove ball valve
3. Remove cover
4. Replace cartridge insert and lip seal
5. Reassemble in reverse order
o push down the cartridge insert till it snaps in
6. Test function (see chapter inspection)
8.2.2 Check valve
1. Close shut off valve on inlet
2. Release pressure on outlet side (e.g. through water
tap)
1. Close shut off valve on outlet
2. Remove ball valve
3. Remove cover
4. Exchange check valve
5. Test function (see chapter inspection)
9. Cleaning
If necessary, the cartridge insert can be cleaned.
1. Close shut off valve on inlet
2. Release pressure on outlet side (e.g. through water
tap)
1. Close shut off valve on outlet
2. Remove ball valve
3. Remove cover
4. Clean or replace cartridge insert and lip seal
5. Reassemble in reverse order
o push down the cartridge insert till it snaps in
6. Test function (see chapter inspection)
We recommend a planned maintenance
contract with an installation company
Maintenance of backflow preventer must be
carried out by authorized personnel!
• Frequency: every 6 month (depending on
local operating conditions)
• To be carried out by an installation company
• Inspection with a test control unit and mainte-
nance-set (see accessories)
Take note of the instructions of the test control
unit TKA295 or TK295
Quick test for the discharge valve:
• Lower the inlet pressure
o if the discharge valve opens (it drops), the
function is o.k.
Take note of the instructions of the test control
unit TKA295 or TK295
We recommend a planned maintenance
contract with an installation company
Frequency: every 1-3 years (depending on local
operating conditions)
To be carried out by an installation company
• Don’t disassemble cartridge insert to indivi-
dual parts!
Check valve will be destroyed after demounting
• To be carried out by an installation company
• To be carried out by the operator
Do not use any cleaning agents containing
solvents or alcohol to clean the plastic parts!
Detergents must not be allowed to enter the
environment or the sewerage system!
• Don’t disassemble cartridge insert to indivi-
dual parts!