User manual HONEYWELL BA298-F

[. . . ] 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. Any other use will not be considered to comply with requirements and would invalidate the warranty. [. . . ] The pressure in zone is higher than in zone , which in turn is higher than in zone . A discharge valve is connected to zone which opens at the latest when the differential pressure between zones and falls to 0. In this way the danger of back pressure or back syphonage into the supply network is prevented. Medium Inlet pressure Operating pressure Water 10. Three ball valves for the connection of a differential pressure gauge Ensure that connections on back flow preventer are clean 3. Provide a straight section of pipework of at least five times the nominal valve size after the backflow preventer · observe required clearances · Connect discharge pipework close coupled and without tight bends according to connection dimensions (see table) · Install discharge pipework in such a way that the discharge connection and the discharge valve can be removed for inspection 8. Procedure according to instruction of the test control unit TKA295 resp. tK295 Quick test for the discharge valve: · Lower the inlet pressure o if the discharge valve opens (it drops), the function is o. Procedure according to instruction of the test control unit TKA295 resp. 2 Maintenance We recommend a planned maintenance contract with an installation company In accordance with DIN EN 1717 a regular maintenance must be taken. Frequency: every 1-3 years (depending on local operating conditions) To be carried out by an installation company Under no circumstances may check valvesand discharge valves be disassembled. Loosen screws, pull the discharge connection downwards and unscrew the discharge valve with the aid of an oil filter strap wrench. Lubricate the `O' ring well with grease, replace damaged `O' rings 8. We recommend a planned maintenance contract with an installation company Maintenance of backflow preventer must be carried out by authorized personnel! [. . . ] Disturbance Cause Remedy Install a pressure reducing valve upstream the backflow preventer Install a pressure reducing valve upstream the backflow preventer Remove check valve or discharge valve and clean it Replace check valve Remove discharge valve, clean or replace it Remove discharge valve and replace 'o'ring Remove discharge valve, clean or replace it Remove control pipe and clean it Discharge valve opens without Pressure strokes in water supply apparent reason system Fluctuating inlet pressure Inlet check valve and/or discharge valves are dirty Leaky inlet check valve Discharge valve don't close Deposits on valve seat Damaged 'o'ring Leaky discharge valve Discharge valve don't open Blocked pressure control pipe 5 mm TK295 Test kit Electronic pressure measuring device with digital indicator, battery-operated. with case and accessories , ideal for inspection and maintenance of backflow preventer type BA. TKA295 Test kit Analogue pressure measuring device with differential pressure display. [. . . ]