Accessories For Ecocontrol Output Management; Additional Heat Generator Demand (Peak Load Heat Generator); Cylinder Management With 5 Sensors (Qm); External Demand On/Off - Viessmann VITOFLEX 300-UF Technical Manual

Control unit
(cont.)

3.3 Accessories for Ecocontrol output management

Additional heat generator demand (peak load heat generator)

For part no., see pricelist
Function:
With the "enable signal" (floating contact), an on-site peak load heat
generator (oil or gas boiler) is activated when the cylinder tempera-
ture falls below a certain value. The temperature of start and stop
points can be selected freely on the controller.
Standard delivery:
■ Floating contact
■ Submenu on touchscreen

Cylinder management with 5 sensors (QM)

For part no., see pricelist
The solid fuel boiler's modulating output operation is optimised with
the use of a heating water buffer cylinder. Short term heat demand
peaks are also covered. The temperature sensors record the heating
of the heating water buffer cylinder. The specification of the charging
level of the heating water buffer cylinder is weather-compensated
and carried out via the outside temperature sensor. The combustion
heating output is matched to the average heating water buffer cylin-
der temperature.

External demand ON/OFF

For part no., see pricelist
A potential-free input is provided in the control panel for external
ON/OFF control.
Note
Only possible in combination with automatic ignition system.

Output signal 0-10 V

For part no., see pricelist
Issuing of boiler output as voltage signal and a connection to receive
a maximum boiler output limit included in standard delivery.
Functions:
■ Issue of the output signals
■ Receipt and processing of an external output restriction
Processing of the 0-10 V output signals
Firebed maintenance
Output operation
Note
The boiler can only be shut down externally via "External demand
ON/OFF"; this must be ordered separately.
VITOFLEX 300-UF
Note
The controller and control unit for the oil or gas boiler is not included
in the standard delivery.
Only possible in combination with 5-sensor cylinder management
(QM).
Standard delivery:
■ 5 Pt1000 sensors with connecting cable
■ 5 sensor wells, R1/2 x 280 mm
■ 1 Pt1000 outside temperature sensor
Note
No 0―10 V output signals possible.
Note
ON/OFF control via an external N/O contact.
Note
The installation of "Output signals 0–10 V" according to QM-Holz-
heizwerke is possible irrespective of additional control modules
used.
No "5-sensor cylinder management (QM)" possible.
from
0.0
3.1
3
to Unit
3.0 V
10 V
Viesmann
21