Bosch CH 120 Guide De Démarrage Rapide page 14

Service menu
Menu item
Constant heat
below
DHW priority
Table 2
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 on the other, frost protection can be assured for the entire heating system
regardless of the control type set:
▶ In the Frost protection menu, set either Outdoor or Room and outdoor (
14
Description
Off: Function deactivated
1 ... 99 °C: From this temperature, the lowering of the
temperature by the heating appliance is suppressed (relevant
only in conjunction with Time program in mode Auto).
Yes: DHW heating is activated, heating interrupted
No: DHW heating is activated, parallel operation with heating.
CH 120 – 6721876580 (2024/02)
).