NA228S-A

Honeywell Automatic refilling unit, NA228S

The NA228S-A automatic refilling unit with DVGW-tested mechanical disconnector permits the fixed connection of closed heating or cooling systems to the drinking water supply network. It integrates a mechanical disconnector, a check valve and a water meter in a single unit. The automatic refilling unit maintains pressure between prescribed upper and lower limits in closed heating and cooling systems. It prevents back flow, back syphonage or back pressure of the heating or cooling water into the potable water network. Limitation of the refilling time is also provided as well as the facility for fast and automatic refilling of the system. In addition, build up of steam in the system caused by loss of pressure is prevented.
For closed or open hydronic heating or cooling systems.
Approvals: Components DVGW approved
Max. media temperature: 120C
Also see product data sheets.
Product description: For closed heating or cooling systems