RHRiverside Hydronics

1 3 ALL DUPLEX STAINLESS STEELCONDENSING BOILERHRR iversideHydronicsHYDRONIC HEAT ENGINES 500 to 800 MBHMEDIUM-MASS fire TUBE DESIGNMODULATING BURNER - PREMIX LOW NOxUP to 96% THERMAL EFFICIENCY AT FULL RATEALL DUPLEX STAINLESS STEELCONDENSING BOILERMEDIUM-MASS DESIGNS upply ConnectionModulating, Pre-Mix, Low NOx BurnerSubmerged, Duplex Stainless Steel Combustion ChamberDuplex Stainless Steel Spiraled fire TubesDuplex Stainless Steel Pressure VesselReturn ConnectionCondensate Collection AreaVent Connection The M3 boiler contains a pressure vessel and fi re tubes fabricated entirely of duplex stainless steel. The material is corrosion-proof in the presence of condensate and the duplex vessel provides additional protection against corrosion in installations with less than optimal boiler water conditions.

2 Including high dissolved oxygen and inadequate makeup water DrainM3 Boiler Effi ciency with Low Temperature Heat Pump Loops65 F to 85 FBTU InputFull FireLow Fire500,00098%99+%650,00098%99+%750,0009 8%99+%800,00097%99+%M3 Boiler Effi ciency with Traditional hydronic Heating Set-Back100 F to 120 FBTU InputFull FireLow Fire500,00096%98%650,00096%98%750,00095% 97%800,00094%96%A superior heat exchanger and medium-mass design combined with a reliable turndown ratio provide remarkably high effi ciency in all boiler system types. 3 Fiberglass Tank Insulation ( )TAdvantages of the M3 Medium Mass Design Less critical and lower minimum fl ow rate compared to low-volume instantaneous boilers.

3 This allows better integration of M3 boilers into building heat loops with VFD pumping systems where the aim is to reduce building fl ow to minimal levels whenever possible. With instantaneous water tube boilers, there is often incompatability between the fl ow rate require-ments of the boilers and the building. This forces a more expensive primary-secondary piping approach in almost all applica-tions and can limit load sharing among several boilers at low fi re. Built-in buffer tank means fewer boiler cycles. The tank helps smooth out boiler system operation during times of low heat demand by providing the loop water volume needed to prevent short cycling. With instantaneous boilers, additional buffer tanks are often added to the boiler loop because the lack of system water volume often undermines high turndown ratios.

4 Set point operation Nighttime setback MODBUS RTU serial connection for monitoring and overwrite by a building automation system LED readout of supply and return temperatures BAS connectable through Modbus RTU protocol with full read-write functionality ELECTRONIC CONTROL OPTIONSM3 boilers will utilize the TempTrac electronic operating control, which includes the following operating modes and features:SUPPLYRETURNSUPPLYRETURNAPPLICA TION FLEXIBILITYPRIMARY-ONLY PIPINGFor traditional heating loops with VFD building pumps, M3 boilers are piped primary-only with isolation valves on each boiler.

5 The extremely low minimal fl ow requirements and the turndown capability of the M3 boil-ers complement the turndown capability of the VFD,helping to maximizing the overall effi ciency of these variable fl ow pumping PIPINGFor heat pump loops where the building loop is often high mass and high fl ow, M3 boilers can be piped primary-second-ary with individual pumps on each boiler. Low pressure drop through the medium-mass design reduces pump horsepower and electrical FLOW CONDITIONSSome boiler systems are designed with occassional no-fl ow conditions. Although a minimum fl ow is rec-ommended, M3 boilers can be adapted for a no-fl ow boiler loop designs.

6 Contact your Riverside Hydronics repre-sentative for application multiple boiler installations with building automation communication over network connection, we recommend the Riverside Hydronics OnTrac multiple boiler controller with Modbus TCP/IP protocol via an Ethernet port. This PID controller has a full-color, touch-screen programmable user interface. It is capa-ble of providing operating history and real-time reporting of boiler operation including firing rate percentage and alarm status. OnTrac communicates with each boiler s TempTrac control through a serial connection using Modbus RTU. A simple, 2-wire daisy chain connects all boilers. Customized gateways are available for Bacnet and FLEXIBILITYM3 boilers vent under positive pressure through up to 150 equivalent feet.

7 Concurrently, the boilers can accept direct combustion air through up to 150 equivalent feet of vent. Vents can be directed through the wall or through the roof. Room combustion air is also acceptable. Vents can terminate in different pressure DUPLEX STAINLESS STEEL - CONDENSING BOILERM odel InputBtuh OutputThermal Effi ciencyMinimum Gas Pressure " @ 120 VACVent Diameter and Equivalent Feet500 WB 130A-CBML500,000480,00096% " @ 100 eq. WB 130A-CBML600,000570,00095%6" @ 150 eq. WB 130A-CBML650,000617,50095%700 WB 130A-CBML700,000665,00095%750 WB 130A-CBML750,000705,00095%800 WB 130A-CBML800,000752,00094%10 VentConnection3334751460 12 Electrical EnclosureSupply Connection2" NPT(from top)8034 Return Connection2" NPT(on back)Drain Valve 1" NPTP ressureReliefValveCombustion AirConnection5-7/8" VIEWSIDE VIEWVent Connection 5-7/8" 1410 Return Connection2" NPT (at bottom)Gas Connection(made from the top)

8 Top Access OpeningCondensate Drain 3/4" FNPT PVC524 RemovableTop Section for DoorwayClearance12 HRRiversideHydronicsHYDRONIC HEAT ENGINES 34-1113 3-2014 Output Btu/h and thermal effi ciency are derived from testing per the requirements of DOE 10 CFR 431 (Federal Energy Policy Act: EPACT)Dimensions are in inches unless otherwise indicatedEmpty weight 680 pounds. Shipping weight 880 pounds. Operating wieght 1800 poundsSTANDARD EQUIPMENT and FEATURES ASME H Stamped and National Board Registered for 100 psi MAWP. Maximum operating temperature 210 F ASME pressure relief valve Drain valve Cleanout/Inspection fittings Insulated with 3" fiberglass Pressure gauge Pre-mix burner with proportional gas/air control and variable-speed blower Modulates up to 4-to-1 Electronic ignition control with pre- and post-purge Programmable electronic operator with temperature readout Firing cycle status indication Manual-reset high-limit Manual-reset.

9 Electronic low-water cutoff with test switch Flame failure audible alarm and indicating light High and low gas pressure switches Alarm on any failure Seamless VFD modulation MODBUS protocol on operating control through a 485 serial connection Remote on-off terminals Remote alarm notification through contacts and serial connection CSD-1 compliantRIVERSIDE Hydronics , LLC FORT WORTH, TEXAS (800) 990-5918