Water Temperature Control—Recirculation Systems—Electronic

Electronic Mixing Centers

The Brain Electronic Mixing centers feature the Rada 32rmx electronic temperature controller.

The Brain Model EMC 2 will deliver up to 150 gpm (563 lpm) and comprises all required installation components supplied pre-plumbed and pressure-tested, mounted to an enameled steel frame. Installing contractor is required to make up to five standard union connections for hot and cold supply in, blended water to the system, and system and water heater return lines.

The Brain Model EMC 22 incorporates a circulating pump, while the The Brain Model EMC 13 adds the Rada Control Module and the integral capability for BAS interface.

The "complete" EMC 223 brings together both of the above options.

The Brain Model EMC 2 series is piped so that it offers a "system redundancy" capability where desirable.

With integrated circuit technology combined with precision hydraulics, the 32rmx allows The Brain to deliver blended water economically at a safe, accurate temperature for sanitary use in recirculated hot water systems.

The Brain supplies blended hot and cold water at a safe, predetermined temperature when any fixture in the building is in use. During periods of no system draw-off, The Brain will maintain the temperature of the continuously flowing, pumped recirculating circuit.

Operational Specifications

The improved accuracy possible with 32rmx control technology, combined with its data input/output communication capability, means:

• Recirculated water control within 2°F (1°C) with minimal recirculation of 2 gpm (7.6 lpm)*
• Accurate control of blended water drawn from the system at a point of use within 2°F (1°C)*
• Minimal, 2°F (1°C) recirculation system temperature loss required for effective loop control
• Elimination of dangerous overnight or non-demand-period "temperature creep"
• Dual operation "set" and "actual" temperature display for effective commissioning, adjustment and system monitoring
• Visual signal by display to show "error" mode or "out of range" system failure, coupled with output for audible alarm and/or downstream solenoid valve relay
• Remote set point adjustment via PC network or BAS.
• System monitoring via PC network or BAS
• 32rmx valve automatically shuts off the hot water flow upon cold water inlet supply failure
• 32rmx valve automatically shuts off the cold water flow upon hot water inlet supply failure 32rmx valve automatically flows cold water only in the event of a power failure

Application

The Brain provides premixed water for multiple showering, hand washing and bathing point-of-use fixtures where hot water is supplied from either a storage-type or instantaneous/semi-instantaneous water heater.

Suitable for installation in hotels, schools, correctional facilities, hospitals, nursing/assisted living homes, dormitories and other multiple-occupant commercial, institutional, and industrial buildings that are required to operate a continuously recirculating pumped hot water system.

Electronic Mixing Centers up to 144 gpm (545 lpm)

EMC 2 is supplied as mixing center that includes:
• Two 32rmx electronic temperature controllers
• 3" Inlet/Outlet and 1" recirculation return piping
• Inlet/return check valves
• Inlet combination ball valve strainers
• Pressure gauges
• Inlet, system blend and return line thermometers
• Isolation valve
• System balancing valves
• 110V/12V UL-listed transformer enclosed in a NEMA
• 4X enclosure
• Low voltage control wiring with protective conduit