Bosch Greentherm 9800 SEO 160 Installation And Operating Instructions Manual page 23

Fig. 17 Hydro air system with Air Handler
[1] Hot water outlet
[2] Cold water inlet
[3] Pressure relief valve
[4] Gas supply
[5] Shut off gas valve (field supplied)
[6] Thermal expansion tank (as required)
[7] Air purge (field supplied)
[8] Cold water supply
[9] Check valve (field supplied)
[10] Thermostatic mixing valve (field supplied)
[11] Thermometer (optional) (field supplied)
[12] DHW outlet
[13] Thermostat (only valid if air handler includes a internal
pump, field supplied)
[14] Air handler
[15] Shutoff valve
[16] Circulation pump (only required if air handler doesn't
Greentherm 9800 SEO 160/199 | SECO 199
includes internal pump) (field supplied)
[17] Control relay (if not included within air handler) (field
supplied)
Installation instructions | 23
6 720 817 281 (2017/05)