Viessmann VITOPEND 100-W Operating Instructions Manual page 41

Terminology
Operating program
You define the following with the oper-
ating program:
■ Central heating and DHW heating
Or
■ DHW heating only, no central heating
Or
■ Only frost protection for the boiler
and the DHW cylinder is active.
No central heating, no DHW heating
Note
No operating program is available for
central heating without DHW heating.
When central heating is needed, hot
water is generally also required (winter
mode).
Operating status
In the "Heating and DHW" operating
program, the operating status changes
from "Standard heating mode" to
"Reduced heating mode" and vice
versa. The times at which the operating
status is changed over are defined
when you set the time program.
Heating mode
Standard heating mode
For periods when you will be at home
during the day, heat your rooms to the
standard room temperature. Set the
periods (time phases) using the time
program for central heating.
Reduced heating mode
For periods when you will be absent or
during the night, heat your rooms to the
reduced room temperature. Set the
periods using the time program for cen-
tral heating.
Room temperature-dependent opera-
tion
A room temperature controller captures
the room temperature and compares
this with the required room temperature
you set. If the room temperature is
lower than the required value, the boiler
is switched on. If the room temperature
is higher than the required value, the
boiler is switched off.
Make any settings on the connected
room temperature controller using the
relevant operating instructions.
Note
The heating water temperature must be
set high enough in order to achieve the
required room temperature.
Room temperature-dependent opera-
tion with room temperature sensor
The room temperature is captured by a
room temperature sensor and transmit-
ted to the control unit. The room tem-
perature sensor is fitted in the room.
Weather-compensated mode
In weather-compensated mode, the
flow temperature is controlled accord-
ing to the outside temperature. More
heat is made available at a lower out-
side temperature than at a higher one.
Appendix
41