Vaillant VRT 350, Operating Instructions Manual, Page: 24 / 36

5 Operating and display functions
24
Operating instructions VRT 350 0020135485_00
5.3.1 Operating modes for the heating circuit
5.3.1.1 Automatic mode
«Operating mode»
→
«Automatic mode»
–
The automatic mode controls the heating circuit in ac-
cordance with the set desired temperature and the set
time periods.
Within the time periods, the controller brings the room tem-
perature to the set desired «Day» temperature (Comfort
mode).
Outside the time period, the controller brings the room
temperature to the set desired «Set-back» temperature
(Set-back mode).
5.3.1.2 Summer mode
«Operating mode»
→
«Summer mode »
–
The heating function is switched off for the heating cir-
cuit and the frost protection function is active.
The hot water generation controls the controller in accord-
ance with the time period that has been set for this pur-
pose.
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 heat-
ing circuit to the set desired «Set-back» temperature,
without taking time periods into consideration.
5.3.1.5 System OFF
«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 deviating operating mode.
5.3.2.1 Automatic mode
The automatic mode controls the hot water generation
in accordance with the set desired temperature for «Hot
water circuit» and the set time periods. In the «Timer pro-
grams» function, you have set time periods for hot water
generation. If you have not set any time periods, the con-
troller uses the time period set in the factory settings for
hot water generation.
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.
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
circuit» and the set time periods. In the «Timer programs»
function, you have set time periods for hot water gener-
ation. If you have not set any time periods, the controller
uses the time period set in the factory settings for hot wa-
ter generation.
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.
5.3.2.3 Comfort mode
The comfort mode controls the hot water generation in ac-
cordance with the set desired temperature for «Hot water
circuit» without taking time periods into account.
5.3.2.4 Set-back mode
Hot water generation is switched off and the frost protec-
tion function is activated.
5.3.2.5 System off
Hot water generation is switched off and the Frost protec-
tion function is active.