Water Heater Water Heater Brochure

Takagi tankless water heaters can be used in a wide variety of applications. Whether used in recirculation systems, in
conjunction with storage tanks or with heating applications, our commercial units are built to provide continuous hot water
when sized appropriately for your home’s needs.
Local codes dictate proper compliance.
Basic Installation
(excluding 540P)
540P Basic Installation
(Models with integrated recirculation only)
Hot Water to Fixtures
Hot Water Return
Gas Supply
Cold Water Supply
Expansion Tank
1. Recirculation pump shall be sized for 2-4 gpm per activated heater (4-8 gpm for T-M50)
2. Recirculation pump shall be controlled by an aquastat. The minimum suggested differential should be 10°F
3. For installations without recirculation, remove the check valves, pump, and aquastat.
TANKLESS APPLICATION DIAGRAMS
Legend
Pump Shut Off / Isolation Valves Pressure Relief Valve
Air Vent Aquastat Check Valve Full Port Ball Valve
All application diagrams shown are concept drawings only. These diagrams are only to be used as basic guides. It is up to the application designer to properly design the
plumbing layout and correctly size all components within an application (pumps, piping, storage tanks, water heaters, etc.). All national and local codes must be followed and will
dictate proper compliance.
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