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Water Temperature Control—Recirculation Systems—Digital

Water Temperature Control—Recirculation Systems—Digital
Water Temperature Control—Recirculation Systems—Digital
Armstrong

The Brain® DRV40R

DRV40R Digital Recirculation Valve (DRV) designed specifically to be the primary water temperature controller in a continuously pumped circulating hot water system. DRV40R is supplied with a recirculation return manifold as shown.

Digital technology provides enhanced water temperature control accuracy which resists zero system demand “Temperature Creep” without the use of a manual throttling valve or a temperature activated pump shut-off device (aquastat).

Operational Specifications

  • +/-2°F water temperature control at points of use 25’ downstream during demand
  • +/- 2°F water temperature control at the DRV during zero system demand “idling” periods
  • 2°F minimum valve inlet to outlet temperature requirement (system recirculation temperature loss)
  • Automatic shutoff of hot water flow upon cold water inlet supply failure
  • Automatic shutoff of hot water flow in the event of a power failure
  • Programmable set point range of 81-158°F (27-70°C)
  • Programmable thermal disinfection mode
  • Programmable 1st level hi/lo temp alarm display
  • Programmable temperature error level for safety shutdown



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