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Bosch 250 SXO NG User Manual

Page 17

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Operation instructions

17

Setting the water temperature
The desired temperature of the hot water can be adjusted on the front control panel of the heater.
The 250 SXO has an electronically controlled gas valve that modulates the burner input in response to both varying
hot water flow rates and/or changes in any incoming and outgoing water temperatures.

Fig. 22 Flow/temperature charts

Hot Water Flow and Temperature with Various Inlet Temperature (lpm/Celsius)

0.00

4.00

8.00

12.00

16.00

20.00

24.00

35

40

45

50

55

60

65

Hot water temperature (ºC)

H

ot

W

at

er

F

lo

w

(l

/m

in

)

Inlet (ºC) 4

Inlet (ºC) 10

Inlet (ºC) 16

Inlet (ºC) 21

Hot Water Flow and Temperature with Various Inlet Temperature (gpm/Fahrenheit)

0.00

1.00

2.00

3.00

4.00

5.00

6.00

7.00

90

100

110

120

130

140

150

Hot water temperature (ºF)

H

ot

W

at

er

F

lo

w

(G

P

M

)

Inlet (ºF) 40

Inlet (ºF) 50

Inlet (ºF) 60

Inlet (ºF) 70