Laarsen Associates PW, IW, VW warranty Mighty Therm Volume Water Heater

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Mighty Therm Volume Water Heater	Page 15

Legend

B - Check Valve

C - Check Valve

D - Tempering Valve

H - Throttling Valves in Building Loop Returns

J - Circulating Pump for Return Loop

K - Service Valves to Isolate Heater and Pump for Service

Figure 17. Two-Temperature Hot Water Supply System with Vertical Tank for Models VW and PW Water Heaters.

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Contents Mighty Therm Table of Contents General Information 1A. Introduction1B. Heater Identification 1C. Flow Requirements Installation2A. Heater Placement 2B. Installation of Indoor HeatersInstallation on Concrete Blocks or Tile 2B-1. Combustion Air Supply 2D. Gas Supply and Piping 2C. Installation of Outdoor Heaters2F. Water Piping of System 2E. Electrical WiringPressure Relief Valve Location 2G. Water Expansion2H. Pump Performance and Installation Hot Water Supply System Model VW & PW With Vertical Tank HorizontalSplit System Piping Diagram, Model IW Dual Installation Piping Diagram, Model IW With Vertical Tank With Horizontal TankMighty Therm Volume Water Heater 2I. Water Pressure 2J. Tank Installation2K. Two-Temperature System Operation3B. Initial Start-Up Hi-Limit Checkout 3C. To Start Up SystemIndoor Models Maintenance3D. To Turn Off Heater 3E. To Shut Down SystemHeater will not Fire Troubleshooting and Analysis Service ProblemsIII. Water Dripping Firebox Numbers Parts Identification Laars Heating Systems Tile Assemblies Ignition Control, Electronic Safety Gas Valve, On-Off Two Stage Nat Plug, 3/4, Sq. Hd Outdoor Parts See Parts Illustration On Outdoor Parts Descriptions and Order NumbersMighty Therm Volume Water Heater Pump Rotating Sections and Repair Parts Optional Parts Descriptions and Order NumbersEnergy Management Monitor EM2