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22 | Installation instructions
•
Internal NTC
– Uses the appliance's NTC sensor to measure the
incoming water temperature.
6.5
Space heating applications
CAUTION:
▶ If the set point temperature is above
120°F, precautions should be taken to
protect users of potable water from
scalding.
For external pump sizing please refer to the
pressure drop curves, fig. 18. Also
remember to account for system piping
pressure loss. A minimum of 1.7 GPM is
recommended to provide adequate flow
through the water heater when determining
the size of the primary pump.
Greentherm 9800 SE / SEC O tankless water heaters are
approved for use in combination DHW and space heating
applications (open loop setup).
These water heaters are not approved for use in space heating
only applications (closed-loop setup). Bosch supports
applications of combination DHW and space heating in an open
loop configuration if plumbed similar to fig. 17.
Please see warranty document for additional details.
6 720 817 281 (2017/05)
Greentherm 9800 SEO 160/199 | SECO 199
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