Brochure
34
Storage Tank
CH
Hot Water Outlet
to Fixtures
Hot Water Return
(Optional)
Cold Water Inlet
Drain
Air Vent *A
Air
Separator
S
Tank Circulation *B
Y-Strainer
Gas Supply
CH
Gas Supply
T
Thermostatic
Mixing Valve
Tempered
Water to
House
Depending on the application, the system may require a
priority switch or priority control.
Air Vent *A
S
Cold water Inlet
Y-Strainer
Recirculation Pump *D
Heat Exchanger
Heating
Application
(Radiant,
Baseboard,
Hydronic Air,
Etc)
Pump *E
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.
Storage Tank (3 Tappings)
Heating (Combination with domestic option)
*A The air vent is to be installed at the highest location of the
system. The diameter of the pipe leading up the air vent is to be
no smaller than the piping throughout the system.
*B 1. The tank circulation pump is to be controlled by:
• Dual-set aquastat (recommended w/ timer)
OR
• Takagi’s Pump Control set to “Storage Tank Mode” (if the
Takagi’s model or controller has this function)
2. The tank circulation pump is to provide no less than 2 gpm
through each activated Takagi’s unit in the system. (Excep-
tion: no less than 4 gpm through each M50 series)
*C 1. The recirculation pump is to be controlled by:
• Dual-set aquastat (recommended w/ timer)
OR
• Takagi’s Pump Control set to
“Recirculation Mode” (if the Takagi model or controller
has this function)
2. The recirculation pump is to provide no less than 2 gpm and
no more than 4 gpm through each activated Takagi’s unit in
the system.
(Exception: between 4 gpm and 8 gpm through each M50
series)
*D 1. The recirculation pump is to be controlled by:
• Dual-set aquastat (recommended w/ timer)
OR
• Takagi’s Pump Control set to
“Recirculation Mode” (if the Takagi’s model or controller
has this function)
OR
• Thermostat controlling the heating application
2. The recirculation pump is to provide no less than 2 gpm
through each activated Takagi’s unit in the system. (Excep-
tion: no less than 4 gpm through each M50 series model)
*E The pump size and control are dependant on the requirements
of the heating application.