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Laing E Series Domestic hot water pumps (FORMERLY SMT-303 NON-TIMER SERIES)
Cat. No. BR-28A
Weight 2 lbs

The E Series pumps’ highly efficient ECM (Electronically Commutated Motor) design results in significant energy savings with improved performance. Through microprocessor technology the motor is provided the precise frequency and voltage for optimum performance. A permanent magnet motor eliminates the requirement for input power to magnetize the rotor, thus maximizing efficiency. This unique design offers superior starting torque when compared with standard induction motor type pumps.

The spherical motor design:
The only moving part of this pump type is a spherical rotor/impeller unit which is suspended on an extremely wear resistant ceramic ball. Shaft seals or conventional bearing bushings with a shaft have been eliminated. The only self realigning bearing in the small pump market has many advantages:
• The suspension on a ball eliminates any bearing play, even after years of use.
• The bearing is self-realigning. It is automatically lubricated and cooled by the system fluid.
• The rotor is magnetically centered on the bearing and therefore can tilt to avoid blockage by small dirt particles. Even after a long time of shut-off, a safe start-up is virtually guaranteed.
• The pump can be cleaned easily with typical household cleaners in the unlikely case of scale deposits. Integrated step-less scale protection thermostats are optional.

Adjustable Thermostat Option
For models with the adjustable thermostat, there is an adjustable Set Point range from 68ºF to 158ºF (20ºC to 70ºC). This built-in temperature sensor will turn the circulator off when it reaches the Set Point and turn the circulator on when the temperature is more than 10ºF (6ºC) below the Set Point. The adjustable thermostat is only available on fixed-speed motors.

Specifically designed for the following uses:
Hot Water Circulation
Fan Coil Heating
Solar Heating
Radiant Heating Systems

Specifications Pump
Max Capacities: 6 GPM
Max Head: 11’
Pipe Connections:
½” FPT and ½” Sweat Suction and Discharge
Maximum Working Pressure: 150 PSI
Maximum Temperature: 230° F
Rotation: counter clockwise when viewed from the motor end

Electronically Commutated AC/DC/AC Spherical Motor
Canned Spherical Type Motor
World Voltage 100-240 Volt 50/60 Hz Cycle
12-28 Watts
Automatic Overload Protection
Low In-Rush Current



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