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Power - Bosch Pro Tankless GWH-450-ES Series Manual

Temperature modulated with electronic ignition - normal duty suitable for recirculating potable water only
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4.3

Power

On
To start the appliance:
B press the ON/OFF
LED (fig. 25) goes orange.
When the burner is working, the LED display shows
the symbol
.
Wait approximately 10 seconds, during
i
this period the appliance will perform a
self test.
Fig. 26
Off
To shut down the appliance:
B press the ON/OFF
4.4
Water temperature
Water temperature can be regulated in a range of
100°F to 140°F. The regulator permanently modulates
the burner flame according to current demand.
To select water temperature outlet:
B Rotate thermostat
temperature (ranging from 100°F to 140°F).
If the burner is working, symbol
Fig. 27
6 720 607 915
button.
switch to OFF position.
in order to adapt water
goes green.
4.5
Power adjustment
Note: only when using the 12 kOhm DHW thermistor.
B Connect thermistor to blue wire with terminal block.
Power can be set from 70% to 100% of full power in
thermostat
(Fig. 28).
Fig. 28
Thermostat
knob position
Min.
approx. 100°F
(38°C)
Max.
approx. 140°F
(60°C)
Table 8
4.6
Freeze prevention
B Do not disconnect the electric supply.
B Do not install in unheated areas which can
experience freezing temperatures.
B Do NOT use non-potable additives like glycol.
Freeze Prevention
A kit is available to prevent heat exchanger from
freezing. For more detailed information about this
feature, consult the instructions supplied with the
accessory
X XXX XXX
XXX.
Operating instructions
DHW
Confort
temp.
regulation
ECO - 75% of
full power
COM - 100%
of full power
21

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