Heating pump | 17
8 716 473 216 (2014/09)Gaz 6000 W
7.5 Setting the heating control unit
The Bosch TRZ200 Open Therm controller (programmable heating
controller) can be used.
7.6 After commissioning
▶ Check the gas supply pressure ( page 22).
▶ Record the settings in the commissioning report ( page 31).
7.7 Setting summer mode
The heating circuit pump and consequently central heating are switched
off. The DHW and power supply for the heating control unit and timer are
retained.
To set summer mode:
▶ Keep pressing – until the symbol appears on the display.
▶ Press OK.
The set maximum flow temperature is displayed.
▶ Keep pressing – until . . appears on the display.
▶ Press OK to save the setting.
is permanently displayed.
Additional instructions are contained in the operating instructions for
the heating programmer.
7.8 Setting frost protection
Frost protection for the heating system:
Frost protection for the heating system is only ensured if the heating
circuit pump is operational and is pumping heating water through the
entire system.
▶ Leave the heating switched on.
▶ Set the maximum flow temperature to at least 40 °C (chapter 7.4).
-or- If you want to leave the appliance switched off:
▶ Add anti-freeze to the heating water ( page 9) and drain the DHW
circuit.
Appliance frost protection:
The appliance frost protection function switches the burner and heating
circuit pump on when the temperature in the installation room (at
temperature sensor for heating flow) falls below 5 °C. This prevents the
boiler freezing up.
▶ Activate summer mode ( chapter 7.7) or set the appliance to
standby mode ( chapter 7.3).
8 Heating pump
8.1 Changing the heating circuit pump curve
The speed of the heating pump can be changed at the pump terminal
box.
Fig. 22
[1] Curve for switch position 1
[2] Curve for switch position 2
[3] Curve for switch position 3 (default setting)
[H] Residual head
[Q] Amount of circulating water
8.2 Pump anti-seizing function
Every time the pump is switched off, a timer is started. If after 24 hours
the pump has not run again, it is switched on briefly.
Observe the operating instructions of the heating
controller. This shows you:
▶ how to adjust the room temperature,
▶ how to heat economically and save energy.
NOTICE: Heating system at risk through frost. In summer
mode, only the appliance is protected against frost.
▶ Observe frost protection measures where there is a
risk of frost ( Chapter 7.8).
For further information, see the heating controller
operating instructions.
NOTICE: Heating system at risk through frost. In
summer/standby mode, only the appliance is protected
against frost.
▶ In order to save as much energy as possible and keep
flow noise to a minimum, set a low pump curve.
This function prevents the heating pump and the 3-way
valve seizing up following long periods of inactivity.
The anti-seizing function remains active during standby
mode.
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5
Q [m³/h]
7
5
3
1
H [m]
1
2
1
8 716 473 216-12.1O
3
.
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