Working Principle / Electric Measurements - Bosch T2400S 8 ND 23 Training And Service Information For After Sales

5. Working Principle / Electric Measurements

Water Flow Detection and solar mode operation
Water Flow Calculation
procedure
WF = Power
(T
WF < 2.4 l/min
Burner OFF
When in solar mode, the unit remains in stand-by mode, because the expected outlet
water temperature is within an acceptable value when compared to the setpoint value. The
water heater must be able to go into solar mode (burner off), when water flow is detected
if:
- inlet water temperature is higher than [Setpoint -1ºC];
or
- expected outlet temperature, calculated with minimum power, is higher than
[Setpoint +10ºC] or 60ºC (whichever is higher)
When the conditions disappear, the unit must be able to start-up the burner and run in
normal operation mode without the symbol in the display.
Page 22 from 45
Pict.30 – Ignition electrodes position on the burner
– T )
set in
WF ≥ 2.8 l/min
Burner ON
6 720 887 546 "SM FP_ErP LPP-MPP Europe 2018/05 en"
Solar mode Operation
Burner On Burner Off
T < 60ºC T
out in
(if T ≤ 50ºC)
set
or
T < T +
out set
10ºC
(if T > 50ºC)
set
≥ T – 1K
set