Scope Of Application; Technical Data - Honeywell NA 228 S-B Einbauanleitung

General Instructions

3. Scope of Application

The fully automatic NA 228 S-B refilling unit with its DVGW-approved component parts:
R 295 SA - 1 / backflow preventer, DIN/DVGW No. 569VEU 097 E
2
RV 282 - 1 / check valve, DVGW No. 0572
2
Type E-T Qn 1.5 DNN.92 water meter
permits permanent fixed connection of closed heating and cooling systems to the drinking
water system. In particular this applies for closed heating systems to DIN 4751, Sheet 2
and for systems to DIN 4751 Sheet 3.
The following operating data applies for the downstream systems:
Maximum system pressure: 6.0 bar
Maximum temperature: 120 °C
For temperatures above 100 °C, the pressure at the highest point in the system when the
system is cold must be at least 1.0 bar above the operating pressure (static height plus 1.0
bar).
4. Approvals
The technical approvals of the NA 228 S-B fully automatic refill unit were obtained from
TÜV Bayern, Hessen, Sachsen, Südwest E.V. under No. AW-SEZ/408/97
The tests are based on the following DIN standards and worksheets:
DIN 3266, Parts 1 and 2
Tests for electrical and mechanical safety 1/EN 61010-1.3.1994 CE,
low voltage guidelines
16

5. Technical Data

Refilling: Flow rate 110 litres/h at 2.0 bar differential pressure
Fast filling: Flow rate finely adjustable between 110 litres/h and
1100 litres/h at 2.0 bar differential pressure
Duration of fill: Adjustable between 6 and 60 minutes
(set at 12 minutes during manufacture)
Water inlet pressure: Minimum 3.0 bar, maximum 6.0 bar
Remote connection: Is connected for 220V~/50 Hz, for control via a pump/vessel unit
water shortage switch. Remote connection must be volt-free.
Supply voltage: 230V ~/50/60 Hz
Electrical Load: 30 W
Dimensions: Height - 380 mm
Width - 370 mm
Depth - 160 mm
Weight: Approximately 16 kg
General Instructions
17