Specifications include, but are not limited to: Category: The Brain®; Type: Digital Recirculation Valve; Model: Model DRV80; 1.0 Digital Recirculation Valve 1.1 DRV shall have four thermistors integral of the mixing valve body that measure the cold water and recirculation return inlet, hot water inlet, mixed water outlet, and over-temp safety measures. 1.2 DRV mixing valve body shall be of 316L stainless steel, mixing valve proportioner of 316L stainless steel, and a NEMA 3S electronics enclosure. 1.3 DRV80 shall have 3” inlet and outlet connections that will deliver 133 gpm @ 10 psid. 1.4 DRV shall be capable of + / - 2°F control during high, low, or extended periods of zero demand on the system, with a continuous recirculation of >10 gpm. Temperature control shall be achieved without aquastat-like control of the recirculation pump. 1.5 DRV setpoint shall be configured by the factory to customer specification. DRV shall be field adjustable. 2.0 DRV80 shall have the following operational specifications: 2.1 + / - 2°F (1°C) water temperature control 2.2 1°F minimum mixed water outlet to recirculated return inlet differential (system temperature loss) 2.3 Minimum continuous recirculation of 10 gpm 2.4 Automatic shutoff of hot water upon cold water inlet supply failure 2.5 Automatic shutoff of hot water flow in the event of a power failure 2.6 Programmable setpoint range of 81°F - 158°F (27°C - 70°C) 2.7 Programmable thermal disinfection mode 2.8 Programmable 1st level hi/lo temperature alert display 2.9 Programmable temperature error level for safety shutdown 3.0 DRV80 shall have the following connectivity specifications: 3.1 Modbus RS-485 port for connection to building automation system (BAS) operating on Modbus RTU protocol 3.2 RS-485 port for connection to SAGE® module with Modbus TCP, BACnet TCP/IP, BACnet MSTP, or LonWorks protocessor Note: Protocessors for other BAS protocols available upon request 4.0 DRV shall be certified to ASSE 1017, UL listed, and conform to CSA B125. 5.0 Warranty 5.1 DRV shall have a 5-year warranty on all components, with the exception of batteries and O-rings. 5.2 Pre-piped DMC components shall have a 2-year warranty from date of installation, but not longer than 27 months from date of shipment.
