Control Unit; Description; Ecocontrol Function; Operation - Viessmann VITOFLEX 300-UF Technical Manual

Control unit

3.1 Ecocontrol specification

Description

For part no., see pricelist
Wood combustion system control including activation of equipment
for fuel charging according to the articles listed separately.
■ The heating output is modulated to match the heat consumption.
■ The control circuit for combustion optimisation with a Lambda
probe overlaps the output control circuit.
■ With regard to fire safety and personal safety, the highest possible
quality criteria are fulfilled.
■ Weather-compensated heating circuit control unit for up to 8 heat-
ing circuits.

Ecocontrol function

■ Automatic ignition system (option)
■ Output control circuit with modulating output operation
(30 - 100 %)
– Air-controlled: Variable speed ventilation air fan subject to boiler
output.
– Exact fuel supply via the feed screw conveyor (dosing hopper
with barrier layer).
– Topping up of the dosing hopper by means of level monitoring.
– Limitation of the burning mass in the combustion chamber by
means of level monitoring.
■ Emissions-optimised control circuit: Optimisation of the air supply
through variable speed ventilation air and secondary fans with
Lambda probe measurement to ensure optimum combustion.
■ Limitation of the combustion chamber temperature with corre-
sponding variation of air ratio for protection of the fireproof lining.
■ The pressure regulator ensures constant negative pressure in the
combustion chamber.
■ Keeping up the return temperature with the boiler mixer ensures a
long boiler service life.

Operation

Operation is via a touchscreen. All operating data can be read from
the display. The set values of all important parameters can be
entered easily. Fault messages are displayed in plain text and issued
in the sequence of occurrence.

Standard delivery package for Ecocontrol

■ Compact control panel
– Powder coated surface
– Version as per ÖVE/VDE guidelines, fully wired to terminal strips
– Feed 3 × 400 V, 50 Hz, control voltage 230 V or 24 V
– Control panel temperature monitoring
– Freely programmable control unit
– Hybrid motor starter for all drives priced separately
– Inverter for fan motors
■ In the control panel door
– 4-pole mains isolator
– Graphics-capable touchscreen
– Control panel fan (incl. Pt1000 control panel sensor)
– Documentation incl. fixed wiring diagram, terminal connection
diagram, operating instructions, installation instructions in the
guide folder
VITOFLEX 300-UF
Menu OFF
Charg- Secondary air Flow
ing Primary air
0 %
0.0 % 0.0 %
Overview
■ Safety functions for:
– Excess temperature
– Burn-back
– Opening of a fuel charging cover
– Forced heat transfer
■ Input terminals in the control panel for:
– 2 high limit safety cut-outs (STB)
– 2 low water indicators
– 2 positive pressure limiters (water)
– Emergency stop (external to TRVB H118)
– CO/CO monitoring (external)
2
■ Floating contacts:
– Operating message
– Fault message (important)
– Fault message (warning)
– Transfer excess heat
– Service message
Touchscreen:
For operating the heating system.
The touchscreen integrated into the control panel door enables visu-
alisation and graphic evaluation of the system.
■ Integral LAN interface (touchscreen)
Note
The control panel must be installed on site.
For the standard delivery package for the sensors, see "Boiler deliv-
ered condition".
If extending the heating circuits, the information in the chapter
"Accessories for Ecocontrol function extension" must be observed.
10:07
Flue gas Flue gas
fan temp.
0 %
0.0 %
Viesmann
19
3