Setting Manual Summer Mode; Setting Frost Protection - Bosch ZBR16-3A Installation And Service Instructions Manual

62 | Commissioning
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.
The DHW on demand signal allows maximum
gas and water savings.
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.
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 (
B Make a note of the setting of the boiler high limit
dial .
B Turn the boiler high limit dial
to .
3
5
2
1
6
max
Fig. 59 Summer mode
For further information, see the operating instructions for
the heating control included in the scope of delivery.
6 720 643 068 (2011/06)
Chapter 7.9).
counterclockwise
reset
eco
3 4
e
2
6
1
min max
6 720 615 065-13.1O
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,
page 60).
3
5
2
1
max
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
( Tab. 15, page 36) and drain the DHW circuit.
For further information, see the operating
instructions for the heating control included in
the scope of delivery.
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,
page 60).
B Turn the DHW thermostat
(59 °F (15 °C)).
3 4
2 5
1 6
max
Fig. 61 Frost protection for the DHW tank
Tab. 24,
reset
eco
3 4
e
2
6
1
6
max
min
6 720 641 933-68.1O
Tab. 24,
counterclockwise to min
reset
eco
3
e
2
1 6
min
max
6 720 641 933-69.1O
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