62 | Commissioning
Copyright (optional information)6 720 643 068 (2011/06)
temperature. Consequently, DHW draws are immediate,
however the appliance may run even if no DHW is being
drawn.
• Economy mode, ECO button lights up
– DHW is only generated when DHW is drawn.
– On demand: Quickly open and close a DHW tap to
signal the appliance to heat to the selected
temperature. After a short wait DHW will be
available.
7.8 Setting manual summer mode
In summer mode or warm weather shut down (WWSD),
the heating zone pump and consequently central heating
are switched off. DHW generation remains active following
the DHW program.
B Make a note of the setting of the boiler high limit
dial .
B Turn the boiler high limit dial counterclockwise
to .
Fig. 59 Summer mode
For further information, see the operating instructions for
the heating control included in the scope of delivery.
7.9 Setting frost protection
Frost protection of the heating system:
B Leave the appliance switched ON; set the boiler high
limit to at least
95
°F
(35
°C
)
(position 1, Æ Tab. 24,
page 60).
Fig. 60 Frost protection of the heating system
-or- If you want to leave the appliance switched OFF:
B Mix Bosch-approved anti-freeze into the heating water
(Æ Tab. 15, page 36) and drain the DHW circuit.
Frost protection of the DHW tank:
B Leave the appliance switched ON; set the boiler high
limit to at least
95
°F
(35
°C
)
(position 1, Æ Tab. 24,
page 60).
B Turn the DHW thermostat counterclockwise to min
(59 °F (15 °C)).
Fig. 61 Frost protection for the DHW tank
The DHW on demand signal allows maximum
gas and water savings.
See also the warm weather shutdown
(WWSD) feature in the operating instructions
for the heating control included in the scope
of delivery.
NOTICE: Heating system at risk of freezing. In
manual summer mode, only the appliance is
protected from freezing.
B Observe frost protection measures where
there is a risk of frost (Æ Chapter 7.9).
6 720 615 065-13.1O
eco
reset
max
1
2
3
5
6
max
1
2
3
4
e
6
min
For further information, see the operating
instructions for the heating control included in
the scope of delivery.
eco
reset
max
1
2
3
5
6
max
1
2
3
4
e
6
6 720 641 933-68.1O
min
max
1
2
3
e
6
max
1
2
34
5
6
eco
reset
min
6 720 641 933-69.1O
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