User manual HONEYWELL NK 295C

[. . . ] According to its intended use · in good condition · With due regard to safety and risk of danger. Note that the appliance is exclusively for use in the applications detailed in these installation instructions. [. . . ] The backflow preventer is a safety device in accordance with EN 1717 to protect systems against back pressure, back flow and back syphonage of nonpotable water into service pipe, plants and equipments. The backflow preventer is separated in three chambers (inlet, middle and outlet chamber). 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. There is no possibility to control the safety function by measuring. The pressure reducing valve reduces the pressure on the inlet side (admission pressure) to the level of the desired pressure on the outlet side (outlet pressure) in individual cases. Spring-loaded pressure reducing valves work accorHoneywell GmbH 5 65°C Connection size HT 40 Discharge Connection size 1/2" AG Complete backflow preventer with discharge connection, valve cartridge (incl. Complete pressure reducing valve with valve insert, spring hood (including adjuster knob), setpoint spring and pressure gauge The installation may not take place in areas or ducts where poisonous gases or vapours may be present or where flooding can occur · The installation location must be ventilated well · The installation location should be protected against frost and be easily accessible O Simplified maintenance and cleaning o Pressure gauge at the pressure reducing valve can be read off easily · Provide a straight section of pipework of at least five times the nominal valve size after the pressure reducing valve (in accordance with DIN 1988, Part 5) · The refilling combination has an integrated strainer - no separate strainer necessary o Refilling combination is protected against malfunction and corrosion damage resulting from ingress of foreign bodies, e. We recommend a planned maintenance contract with an installation company In accordance with DIN EN 1717 a regular maintenance must be taken. 1 Pressure reducing valve Interval: once a year To be carried out by an installation company or the operator. Check outlet pressure on pressure gauge when no flow is occurring o If the pressure is increasing slowly, the valve may be dirty or defective. In this instance, carry out servicing and cleaning 3. [. . . ] If water exits at the refilling combination, call the technical customer support service!Problem Beating sounds Cause Non return valve is faulty Remedy Call our Technical Customer Services Call our Technical Customer Services Fit refilling combination in flow direction (note direction of arrow on housing) Water is escaping from refilling Sealing elements are contaminated or combination worn No or too small water flow rate Refilling combination is not fitted in flow direction Ball valves up- or downstream of refilling Open ball valves entirely combination are not fully open Drain cocks at the shut off ball valves upand downstream of the refilling combina- Close drain cocks tion are not fully close Pressure reducing valve is not set to the desired outlet pressure Refilling combination change not into flow position Set outlet pressure Check supply pressure with reaction pres- Call our Technical Customer sure Services Check plant Refilling combination opens and plant downstream leaky closes in short time intervals Call our Technical Customer Non return valve is contaminated or worn (pump) Services Porucha Zvuky náraz Pícina Blokování zptného toku je vadné Odstranní Kontaktujte technické servisní odd lení Kontaktujte technické servisní odd lení Namontujte doplkovou kombinaci ve smru prtoku (dbejte smru sipky na krytu) Uzavírací kulové kohouty zcela otevete Vyprazdování na uzavíracích kulových Zcela zavete vyprazdování kohoutech ped a za doplovací kombinací není zcela uzavené Redukcní ventil není nastaven na poza dovaný zadní tlak Doplovací kombinace se Zkontrolujte tlak zdroje ve spojení s nepepíná do prtokové polohy reakcním tlakem Doplovací kombinace se pipojené zaízení netsní otevírá a zavírá v krátkých inter Blokování zptného toku je znecistné valech (pumpování) nebo vadné Nastavte zadní tlak Kontaktujte technické servisní odd lení Zkontrolujte zaízení Kontaktujte technické servisní odd lení [. . . ]