Viessmann VITOPLEX 300 Type TX3A - Setting heating programs; Adjusting the heating curves (slope and level)

■ Heating and DHW
■ Only DHW
■ Standby mode
Optional external changeover of heating program for all heating cir-
cuits together or for selected heating circuits only.
Frost protection
■ The frost protection function will be switched on if the outside tem-
perature drops below approx. +1 °C, i.e. the heating circuit pumps
will be started and the flow temperature will be maintained at a min-
imum of 10 °C.
■ The frost protection function will be switched off if the outside tem-
perature exceeds approx. +3 °C, i.e. the heating circuit pumps will
be stopped.
Summer mode
("DHW only")
The burners start only when the DHW cylinder needs reheating (con-
trolled by the cylinder thermostat).
The respective low-end boiler water temperature of each boiler is
maintained if necessary.
Adjusting the heating curves (slope and level)
The Vitotronic regulates the system flow temperature and the flow
temperature of the heating circuits with mixer in weather-compensated
mode. For this, the system flow temperature is automatically boosted
by between 0 and 40 K (delivered condition 8 K) above the currently
required set flow temperature of the heating circuits with mixer.
The flow temperature required to reach a specific room temperature
depends on the heating system and the thermal insulation of the build-
ing to be heated.
Adjusting the heating curves matches the system flow temperature
and the flow temperature of the heating circuits with mixer to these
operating conditions.
The upper flow temperature of the heating circuits with mixer is limited
by the thermostat and the electronic maximum temperature limiter of
the Vitotronic 100, type GC1.
0,2
Outside temperature in °C
Boiler water or flow temperature in °C
Slope
2,4
2,6
2,8
3,0
3,2
3,4
90
80
70
60
50
40
30
0 -5 -10 -15 -20510
2,0 2,2
0,4
0,6
0,8
1,0
1,2
1,4
-30-25
100
110
1,6
1,8
1520
Specification
Rated voltage 230 V~
Rated frequency 50 Hz
Rated current 6 A
Power consumption 10 W
Protection class I
IP rating IP 20 D to EN 60529;
ensure through appro-
priate design/installa-
tion
Function Type 1B to
EN 60 730-1
Permissible ambient temperature
– during operation 0 to +40 °C
Installation in living
spaces or boiler rooms
(standard ambient con-
ditions)
– during storage and transport -20 to +65 °C
Rated capacity of the relay outputs
sÖ
Heating circuit pumps
or
Heat exchanger set
or
Switching output 4(2) A 230 V~
sA
Circulation pump for cylinder heat-
ing
4(2) A 230 V~
sK
DHW circulation pump 4(2) A 230 V~
sL
Shunt pump 4(2) A 230 V~
gÖ
Central fault message 4(2) A 230 V~
gS
Mixer motor
or
Mixer motor constant return temper-
ature control
or
Motor, 3-way mixing valve, primary
store system 0.2(0.1) A 230 V~
Total 6 A 230 V~
Dimensions
297
584
108
172
B
A
A
B
A
Vitotronic 300-K
B
Mounting panel
Delivered condition
■ Programming unit
■ LON communication module with two terminators
■ Outside temperature sensor
■ Flow temperature sensor
■ Cylinder temperature sensor
■ Mounting panel
■ Bag with technical documentation
The control unit is delivered with one of the boilers of the multi-boiler
system (see pricelist) and is mounted with a mounting bracket either
on the wall or on the side of the boiler.
Control units
(cont.)
OIL/GAS BOILERS
VIESMANN
61
5822 426 GB
11