Honeywell CA295, Руководство по установке, Страница: 6 / 16

MU1H-1225GE23 R0616 6 Honeywell GmbH
GB
7. Maintenance
In accordance with DIN EN 1717 a regular maintenance must
be taken.
7.1. Inspection
7.1.1. System disconnector
1. Close shutoff valve on inlet
2. Open the drain point on the inlet side of the shut-off ball
valve.
• If the differential pressure between middle and inlet
chambers is less than 10 % of the inlet pressure, the
system disconnector moves into disconnect position
(back suction). The inlet side backflow preventer closes
and the discharge valve opens.
3. Close the drain point on the inlet side of the shut-off ball
valve
4. Slowly open shutoff valve on inlet
7.1.2. Tightness
1. Open sampling point
• Backflow preventer changes into flow position.
2. Optical control backflow preventer of location and tight-
ness.
8. Disposal
• Dezincification resistant brass housing
• High-quality synthetic material valve cartridge
• High-quality synthetic material check valves
• NBR and EPDM seals
• High-quality synthetic material discharge connection
We recommend taking out a servicing contract with
an installation firm
Interval: once a year
To be carried out by an installation company or the
operator.
Discharge valve does not open, replace backflow
preventer!
Interval: once a year
To be carried out by an installation company or the
operator.
Water is escaping from backflow preventer call Tech-
nical Customer Service!
Observe the local requirements regarding correct waste
recycling/disposal!