User manual HONEYWELL R295HP-F

[. . . ] It is necessary during installation to comply with local requirements, to follow codes of good practice and to follow the installation instructions. The installation location should be protected against frost and be easily accessible. Install the backflow preventer with good accessibility and with flow in the correct direction. [. . . ] ⷠIf water comes out, check the valve insert, seal disc and seals as described in section 5 and replace them if necessary. The backflow preventer must then go to the flow position at the set pressure indicated on the rating plate. ⷠThe set pressure must be checked by connecting a pressure measuring device between the outlet and the backflow preventer. ⷠIf the backflow preventer does not go to the flow position at the given operating pressure, check hydraulically actuated changeover valve, the valve insert, seal disc and seals as described in section 5 and replace them if necessary. These inspections and tests should be carried out at least once a year by the user or by a specialist. Depending on operating conditions, it may be necessary to carry out these tests and inspections more frequently. Commissioning should be in the following sequence: 1. Slowly open shutoff valve 1 When reaching the minimum inlet pressure the backflow preventer turns to flow position so that the complete pipe unit is filled up to the shut-off valve 5 . After filling or when there's no more water drawn from the system the differential pressure transmitter switches over the hydraulic actuated changeover valve 20 so that the backflow preventer turns back to shut-off position. When water is drawn from the downstream system, the differential pressure in the backflow preventer rises. To be carried out by a specialist The time interval (DIN 1988 specifies 1 to 3 years) is dependant upon the site conditions. Relieve pressure from valve (for example by opening drain valve 7 ). Check valve insert and seal for good condition and if necessary clean or replace. Slowly open shutoff valve 5 and fill and vent the system. [. . . ] Slowly open shutoff valve 5 and fill and vent the system. 0 bar Installation position Horizontal with spring bonnet upwards Operating temperature Up to 40 °C Opening pressure Dp = 0. Description Nominal size Part number Valve insert complete 10 0, 5 bar DN 65 R 295 A ­ 65 FA DN 80 R 295 A ­ 80 FA DN 100 R 295 A ­ 100 FA DN 125 R 295 A ­ 125 FA DN 150 R 295 A ­ 150 FA DN 200 R 295 A ­ 200 FA Seal ring set 8 DN 65 0901093 DN 80 0901094 DN 100 0901095 DN 125 0901143 DN 150 0901145 DN 200 0901147 Blanking plug with seal ring (pack of 5) 17, 18 DN 65-200 S 15 M ­ 1/2 Lip seal ring 19 DN 65 5350000 DN 80 5350300 DN 100 5350400 DN 125 2070300 DN 150 2067300 DN 200 2238900 Valve piston complete 14 DN 65 0900376 DN 80 0900377 DN 100 0900378 DN 125 0900379 DN 150 0900380 DN 200 0900381 Changeover valve 20 DN 65-200 2183500 Pressure balancing valve 21 DN 65-200 0901417 Rear connection G1/2" Range: 0 - 4 bar, 0 - 10 bar, 0 - 16 bar, 0 - 25 bar Please indicate upper value of pressure range when ordering W 15 Elbow Galvanised malleable iron, G 1/2", for pressure gauge M 15 [. . . ]