Power Adjustment Knob; Draining The Appliance - Bosch 520-HN -L Manual

Fig. 20
▶ Turning the flow control knob clockwise restricts water
flow. This provides higher temperature because the water
is moving slower, spending more time over the burner
flames. Turning flow control knob fully clockwise also
lowers the activation rate (water flow needed to turn the
heater on) to 0.5 gpm.
▶ Turning the flow control knob counter-clockwise increases
water flow. This provides lower temperature because the
water is moving faster, spending less time over the burner
flames. Turning flow control knob fully counter-clockwise
also increases the activation rate of the heater to 1.1 gpm.
Knob position
Degree rise
Activation rate
Max flow rate
Table 12 Flow control knob settings
5.5

Power adjustment knob

The power adjustment knob (see Fig. 21 & Fig. 22) adjusts
temperature by adjusting the amount of gas supplied to the
burners.
(note: change in flame height not always visible with knob
adjustment).
▶ Turning the power adjustment knob clockwise supplies less
gas to the burners and lowers the water temperature.
520 HN
Counter-
Clockwise clockwise
90 °F 45 °F
0.5 GPM 1.1 GPM
2.0 GPM 4.3 GPM
Fig. 21
▶ Turning the power adjustment knob counter-clockwise
supplies more gas to the burners and raises the water
temperature.
Fig. 22
Maximum temperature
The maximum temperature is achieved by turning the (left)
power adjustment knob fully counter-clockwise and the (right)
flow control knob fully clockwise.
5.6

Draining the appliance

If there is a risk of freezing, proceed as follows:
▶ Remove the retaining clip from water valve (pos. 1).
▶ Remove bushing and filter (pos. 2) from water valve.
Operation instructions | 23
6720608036-09. 1 Av
6720608036-10. 1 Av
6 720 644 942 (2014/11)