Bosch CH 120 Guide De Démarrage Rapide page 14

Service menu
5.2 Heating
NOTICE
Danger of damaging or destroying the screed!
Excessive temperatures in underfloor heating systems can destroy the screed.
▶ If an underfloor heating system is installed, observe the maximum flow
temperature recommended by the manufacturer.
Menu items: Pump connection | Mixed HC | Mixer runtime | Type of HC pump | Pump
error type | Heating system | Heat control type | Heat control type | Heat curve
adaption | Max. flow temperature | Heat control type | Min. outdoor temperature |
Design flow temperature | Control Characteristic | Pump economy mode | Room
influence | Solar influence | Building / damping | Frost protection | Frost prot. limit
temp. | Constant heat below | DHW priority
5.2.1 Threshold temperature for frost (frost protection limit temperature)
NOTICE
Risk of destroying hot water-conducting system components if the threshold
temperature for frost is set too low and room temperatures are below 0 °C!
▶ Only specialists are permitted to adjust the factory setting of the threshold
temperature for frost (5 °C).
▶ Do not set the threshold temperature too low.
Damage caused by a threshold temperature set too low is not covered by the
warranty!
▶ System frost protection is not possible without outdoor temperature sensor.
The Room setting does not offer absolute frost protection, because pipework
installed in façades, for instance, can freeze. If an outside temperature sensor is
installed, frost protection can be guaranteed for the entire heating system regardless
of the control type set:
▶ In the Frost protection menu, set either Outdoor or Room and outdoor (
14
CH 120 – 6721890772 (2024/09)
).