User manual HONEYWELL NA 228 S-B

[. . . ] NA 228 S-B Automatic refilling unit for compressor level control Product specification sheet Application The NA 228 S-B automatic refilling unit with DVGW-tested backflow preventer permits the fixed connection of closed heating or cooling systems to the drinking water supply network. [. . . ] Special Features q q q q Construction The automatic refilling unit comprises: q q q q q q q q q q q q Powder coated pressed steel housing Drinking water and system connection with shutoff ball valve Electronic time relay Fault indicator lamp and cut-out button Pressure gauges for inlet and system pressure Discharge tundish Electrical plug for compressor side connection ON/OFF switch 1 metre connection cable without plug Water meter Bush for cable connection to a building management system Operating-time meter Filling duration Water inlet pressure Remote connection Technical Data Refilling Fast filling Flow rate 110 litres/h at p = 2. 0 bar Flow rate finely adjustable between 110 litres/h and 1100 litres/h at p = 2. 0 bar Adjustable between 5 and 100 minutes Minimum 3. 0 bar, maximum 6. 0 bar** 220 V, 50/60 Hz to activate compressor level indicator switch , , lack of water" Volt-free contact 230V, 50/60 Hz 30W R 1/2" and Ø15 225 Range of Application The following operating data applies for the downstream system: System pressure: Maximum 6. 0 bar Temperature: Maximum 120 ºC q q q q q q q Components DVGW-approved Electrical changeover valve for control of the backflow preventer Supplementary hot-water-resistant check valve for increased protection of the drinking water network Setting facility for fast filling or refilling of the system Time relay, for limitation of the refilling period Standardised discharge connection Remote volt-free connection Bush for cable connection to a building management system Circuit protection for volt-free connection Operating-time meter, measures the refilling time Water meter, measures the refills 4 GRÄSSLIN 2 0 bar 6 8 h UWZ 52 220V~50Hz vom Kal twa sse rne tz 5 SPX 1996 10 15 0 bar 16 Nachfül 8 NA 22 at Typ: lautom / DVGW Hz TÜV ~ 50/60 230V 30 Watt * For temperatures above 100 ºC, the pressure at the highest point in the cold system must be at least 1. 0 bar above the operating pressure (static height plus 1. 0 bar). ** A pressure reducing valve must be fitted before the refilling unit for pressures above 6. 0 bar Supply voltage Power consumption Connection size: Subject to change 03/99 Automatic Refilling unit NA 228-SB Method of Operation If the system pressure falls below the lower set value, for example through leakage losses, then the changeover valve is opened by the compressor level control , , lack of water" and thereby permits water supply to the backflow preventer. The inlet pressure moves the backflow preventer to the flow position and the system is refilled until the pressure rises to the upper set limit. The time period of the refill is monitored by the time relay and the operating time counter. Once the upper limit value has been reached, the compressor level control , , vessel filled" closes the changeover valve and the backflow preventer goes to the shutoff position. If the inlet pressure falls to the set pressure of the backflow preventer during the automatic refilling operation, then the backflow preventer (2 bar) automatically goes to the shutoff position. The shutoff position of the backflow preventer is indicated in the viewing window (green visible = shutoff position) Option NA 228 S-B Connection size R Soldered connection size (mm) Weight (approx. kg) Dimensions (mm) H B T Test Certificate Number /2" Ø15 16 380 370 160 101/87/147 1 T NETZ EIN/AUS B Fremdanschluß - potentialfrei - zur Heizungsanlage 00000000 5 0 bar 10 16 15 226 Braukmann Water Control . [. . . ] Box 1347 D - 74819 Mosbach-Germany Phone: (49) 62 61/ 0 62 61/8 10 · Fax: 0 62 61/8 13 09 228 http://europe. hbc. honeywell. com [. . . ]