Water Temperature Control - Recirculation Systems
Digital
The Brain® Model DRV40
DRV40 Digital Recirculation Valve (DRV) designed specifically to be
the primary water temperature controller in a continuously pumped
circulating hot water system.
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 DRV water temperature control at peak, moderate or zero
fixture demand on hot water system designed for continuous
recirculation
• 2˚F minimum recirculating water temperature differential
• LCD display which indicates: set point, delivered temperature,
error codes and alarm conditions capable of BAS and mobile
connectivity
• Programmable set point range of 81-158°F (27-70°C) capable of
BAS or mobile monitoring and adjustment
• Programmable thermal disinfection range of 158-185°F (70-85°C)
• Programmable 1st level hi/lo temp alarm display capable of BAS or
mobile alerting
• Automatic safe closure of hot water inlet in response to: inlet
supply failure, 110V power failure, or programmable high
temperature error
• Automatic safe closure of hot water inlet powered by a replaceable
lithium battery monitored for low-level alerting
Technical Specifications
• 100-240V AC
• Polymer Electronics Enclosure
• Stainless Steel Valve Construction
• Lead Free compliant
• Maximum inlet HW supply temperature 185°F (85°C)
• Minimum Continuous Recirculation - 5 GPM (19 LPM)
• Minimum System Draw Off - 0 GPM
• Conforms to ASSE 1017, CSA B125.3-11, UL E357437, and CE
• Operational water pressure of 10-200 psig (7-13.3 barg)
• Display in °C or °F
• Shipping weight 15 lbs (6.8 kg)
• Integral MODBUS RTU for direct connectivity to BAS, or SAGE®
Connectivity
RS485 Serial Port – Integral MODBUS RTU for direct connectivity
to BAS. Seamless integration with SAGE® (BS) connectivity options.
See DRV40BS for SAGE® (BS) module available with specific
ProtoCessor cards for BAS Connectivity to systems which operate on
Modbus TCP, BACnet™, or LonWorks™ protocols. Mobile Connectivity
may be enabled by a customer activated no-term subscription.
Mobile Connectivity features smart hot water system dashboard
monitoring, secure remote programming, multi-location view,
temperature and system diagnostic alerts, with unlimited digital
documentation and automated report generation.
For a submittal drawing, refer to D41578.
Recirculation Systems - Digital (GPM and PSIG)
Model Pressure Drop (PSIG)
Minimum System Draw-Off Maximum Flow @7.5 ft/sec. CV
DRV40 5 10 15 20
GPM 48 70 85 98 0 41 22
Recirculation Systems - Digital (LPM and BARG)
Model Pressure Drop (BARG)
Minimum System Draw-Off Maximum Flow @7.5 ft/sec. CV
DRV40 0.3 0.7 1.0 1.4
LPM 181.7 265.0 321.8 371.0 0 155 22
