Installation / Operation Instruction Manual

Installation instructions

RTG-K-199/160N/X2 – 6 720 813 642 (2022/06)

Fig. 20 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

[6] Thermal expansion tank (as required)

[7] Air purge

[8] Cold inlet

[9] Check valve

[10] Thermostatic mixing valve

[11] Thermometer (optional)

[12] DHW outlet

[13] Thermostat (only valid if air handler includes an internal

pump

[14] Air handler

[15] Shutoff valve

[16] Circulation pump (only required if air handler doesn’t

includes internal pump)

[17] Control relay (if not included within air handler)