Single T9800 With Domestic Hot Water Recirculation Installation - Bosch Greentherm T9800 SEC 160/199 Applications Manual

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4.3.1 Single T9800 with domestic hot water recirculation installation

Domestic
Hot Water
NBT-23
Condensate
)
Neutralizer 1
(part# 7 738 005 514)
To drain or
pump
Legend
Full-port
ball valve
Union
Potable
expansion
tank
1) as required by local code.
External Recirculation Pump:

Max pump amp draw: 5 amps

User defined recirc schedule set using built-in tankless controller

Pump is powered only during scheduled periods when inlet temperature
sensor is less than the set point temperature of the unit by a fixed
differential

See Section4.3, page 11 for specific temperature values
DISCLAIMER: This drawing is conceptual in nature, not to scale and for reference only. Additional functional, installation, and safety devices may be needed or
required. All work pertaining to the installation shall be in full compliance with all legal requirements, including national and local codes. Best installation practices
should be followed.
Data subject to change
Thermostatic
mixing valve
Check valve
Pressure
relief valve
Domestic
Cold Water
Gas
Recirc pump
Aquastat
Drip leg /
Sediment trap
Application Manual
DHW
Recirculation
Return
see wiring detail
Section 4.3, page 11
06.2017 | Bosch Thermotechnology Corp.