Vaillant VRT 350f Installation Instructions Manual page 23

5.3.1.3 Comfort mode
Operating mode → Comfort mode
–
The Comfort mode operating mode brings the heating
circuit to the set desired day temperature, without taking
account of a time period.
5.3.1.4 Set-back mode
Operating mode → Set-back mode
–
The Set-back mode operating mode controls the heating
circuit to the set desired Set-back temperature, without
taking time periods into consideration.
5.3.1.5 System OFF (Frost protection active)
Operating mode → System OFF
–
The heating function is switched off. The frost protection
function is activated.
5.3.2 Modes for hot water production
The operating mode for hot water generation corresponds
to the heating circuit operating mode that has been set. You
cannot set a different operating mode.
0020131979_01 Operating instructions
5.3.2.1 Automatic mode
The automatic mode controls the hot water generation in ac-
cordance with the set desired temperature for Hot water cir-
cuit and the set time periods. In the Timer programs func-
tion, you have set time periods for hot water generation. If
you have not set any time periods, the controller uses the
time period set in the factory settings for hot water genera-
tion.
Within the time period, hot water generation is switched on
and maintains the hot water in the domestic hot water cylin-
der at the preset temperature. Outside the time period, hot
water generation is switched off.
5.3.2.2 Summer mode
The summer mode controls the hot water generation in ac-
cordance with the set desired temperature for Hot water cir-
cuit and the set time periods. In the Timer programs func-
tion, you have set time periods for hot water generation. If
you have not set any time periods, the controller uses the
time period set in the factory settings for hot water genera-
tion.
Within the time period, hot water generation is switched on
and maintains the hot water in the DHW cylinder at the pre-
set temperature. Outside the period, hot water generation is
switched off.
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