Setting Manual Summer Mode; Setting Frost Protection; Activating The Key Pad Lock - Bosch Greenstar combi 100 p Installation And Service Instructions For Contractors

38 | Commissioning
ECO button
Pressing and holding the ECO button until it lights up switches between
Comfort mode and Economy mode.
• Comfort mode, ECO button not illuminated (standard setting)
The appliance is continually maintained at the set 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.
8.5

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.
▶ Observe frost protection measures where there is a risk of frost (
Chapter 8.6).
▶ Note the supply temperature controller setting
▶ Turn the boiler high limit dial
.
3
5
2
1 6
max
Fig. 50 Summer mode
For further information, see the operating instructions for the heating
control included in the scope of delivery.
6720872361 (2017/04)
counterclockwise as far as it will go
reset
eco
4
3
e
2
6
1
min
max
8.6

Setting frost protection

Frost protection of the heating system:
▶ Leave the appliance switched ON; set the boiler high limit to at least
95 °F (35 °C) (position 1,  Tab. 20, page 37).
3
5
2
1 6
max
Fig. 51 Frost protection of the heating system
-or- If you want to leave the appliance switched OFF:
▶ Mix Bosch-approved anti-freeze into the heating water ( Tab. 19,
page) 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:
▶ Leave the appliance switched ON; set the boiler high limit to at least
95 °F (35 °C) (position 1,  Tab. 20, page 37).
▶ Turn the DHW thermostat
(50 °F (10 °C)).
3 4
2 5
1 6
max
Fig. 52 Frost protection for the DHW tank
8.7

Activating the key pad lock

The key pad lock affects the boiler high limit dial, the DHW thermostat,
and all buttons except the ON/OFF switch, emissions test button, and
reset button. It can be used to limit unauthorized access to the boiler.
Activating the key pad lock:
▶ Press the key pad lock button until
temperature are alternating on the display.
3 4
2 5
1 6
max
Fig. 53 Key pad lock
Unlocking the key pad:
▶ Press the key pad lock button until the display shows only the supply
temperature.
reset
eco
3 4
e
2
6
1
min max
6 720 641 933-68.1O
counterclockwise as far as it will go
reset
eco
3
e
2
1 6
min max
6 720 615 065-15.1O
and the heating supply
reset
eco
3 4
e
2
6
1
max
min
6 720 615 065-17.1O
Greenstar combi 100 p / 151 p