` ACEEE HOT WATER FORUM ACT D’MAND KONTROLS® SYSTEM February 16 th 2015 PRESENTED BY LARRY ACKER “Designed for today, Dedicated to the Future®”. 1

TWO TIMES A RECIRCULATION PUMP SHOULD NOT RUN, 1) NO DEMAND FOR HOT WATER. 2) IF HOT WATER IS ALREADY IN THE SYSTEM.

DEMAND CONTROLS There are certain cases where Demand Controls that allow the hot water flow to stop will not work. 1) Cross connections. This occurs in areas like showers, washing machines and bad plumbing. 2) Hot water pumping used for Hydronic heating. 3) Vertical buildings that have booster pumps systems to maintain water pressure.

Water Heater Losses End-Use Energy 40% 30% Branch Losses Recirculation Loop Losses Hot water supply Hot water return Cold water supply Mechanical Room Branch DHW System Energy Flow 45% 29% 1% 25% Distribution Losses

Demand activation- flow switch Ultra-sensitive flow switch detects demand anywhere in the building and sends a signal to the pump

FLOW SWITCHES Can create false readings up to 60 or more times a day. Start up of electric pumping systems is maximum power. Internal or inline flow switches may create failure issues, either mechanical or deterioration.

The Repercussions of Using Flow Switch

FACTS The U.S. Environmental Protection Agency’s “Green Lights” program says that electricity is linked to air quality or Carbon Footprint. On Average, every Kilowatt-hour of electricity saved “prevents the emission of # 1.5 POUNDS OF CARBON DIOXDE # 5.8 PGRAMS OF SULFUR DIOXIDE # 2.5 GRAMSW OF NITROGEN OXIDES

Palm Springs: 12 Unit Complex Average Savings 14% Boiler Reduction 99% Energy Reduction 5% Water Savings

3/21 The Problem A Typical Central Water Heating System 2) Is heated to Approximately 140 ℉ 1)City cold water supply 3) Hot water is continuously circulated throughout the building from the storage tank 4)Pipes lose significant heat into the surrounding environment as hot water is continuously circulating 5) When water returns, it is much cooler and these heat losses must be made up, resulting in excessive gas usage. This is occurring 24/7, whether or not anyone is actually using hot water Some of the suspicious files suitable for analysis have not been approved for submission yet. To open an approval window, click on this message.

D’MAND CIRC® is Cost Effective Boiler run time before and after Studies conducted by the C.E.C. and So Cal Gas Co. confirm the energy saving effectiveness.  Average gas savings: therms annually  Average electricity savings: kWh annually  Average payback: 8-18 months The D’MAND Circ® provides greater gas savings than most other alternative measures

The Solution: D’MAND CIRC® ‘Brains’: -patented circuit board -uses sensors to pump on demand D’MAND® Circuit Board Sensor Connections Power Plug Reduced pump run time results in: Less gas used by boiler Less electricity used by pump Less wear and tear on pipes -water heater runs less -reduces hot water corrosion on pipes (less leaks, re-piping, water damage) Running the re-circ pump on D’MAND ® only pumps when necessary! Office or administration building Dormitory or other multi- unit dwelling HospitalSchool Retrofits into any existing building, including:

Benefits of D’MAND® Controlled Circulation in Multifamily Buildings Reduced Gas Use Heat loss in pipes causes boiler to reheat unused water Reduced Electricity Use As compared with pumps that run 24/7 Less wear and tear on pipes Aids in the reduction of costly pinhole leaks Increased pump life May run as little as 20 min per day without hot water disruptions or delays

Using Demand Controls at the End of a Twig and on the Distribution Loop Multiple demand units can be used in large buildings where the pipe branches are so long that there is a significant wait for hot water, regardless of recirculation on the trunk line. This combines the method used in a commercial building with the retrofit application of demand controls in single family homes with no return line. This is the most sustainable retrofit method for large buildings with long branches that won’t be served by the main recirculation loop or trunk. Use Demand controls on the existing recirculation loop to increase efficiency of the trunk line Use Demand controls at the end of each twig to create new vertical loops to reduce the wait time for hot water

Remote Sensor

Overview With the Grundfos ALPHA, you can stop worrying about complicated pump settings. Simply install the pump and leave it on the factory setting AUTOADAPT. The ALPHA will automatically analyze the heating system, find the optimum setting and continue to adjust its operation to changes in demand. With its permanent magnet motor design, this energy efficient circulator will reduce power consumption up to 80 %. Ensuring lowest possible energy consumption without sacrificing comfort.

Applications The Grundfos ALPHA is designed for circulating liquids in light commercial and residential heating systems. Available in cast-iron pump housings for closed systems or stainless steel housings for open or domestic hot-water systems. The Grundfos ALPHA is suitable for Systems with constant head requirements Systems with variable head and or flow requirements Fixed speed requirements Features and benefits Compact permanent magnet maintenance-free wet rotor technology Nut capture flanges Available with integrated terminal box or line cord option Simple one button hydraulic selection Seven hydraulic selections available – Three fixed speeds options – Three constant pressure options

MADE IN AMERICA

COMMERCIAL/MULTI-FAMILY ACT D’MAND CIRC® SYSTEMS