Viessmann Vitoflex 300-RF Technical Data Manual page 30

Electrical
Ecocontrol
Controller for the wood combustion system incl. 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 4 heating circuits.
Function
Automatic ignition
Output control circuit with modulating output operation
(25 - 100 %)
– Air-controlled with variable speed flue gas fan
subject to flow temperature
– Exact fuel supply via the feed screw conveyor from
dosing hopper with barrier layer
– Topping up of the dosing hopper by means of level
monitoring
– Limitation and distribution of the mass to be burned
in the combustion chamber by means of level
monitoring in the combustion chamber and
movement of the infeed grate
Emission-optimised control circuit: optimisation of the
air supply through motorised air dampers with Lambda
probe measurement to ensure optimum combustion
Keeping up the return temperature with the boiler
mixer ensures a long boiler service life
Controller for the pressure-jet oil burner on the
Vitoflex 300-UF
Safety functions for:
– Excess temperature
– Burn-back
– Opening a charging cover
– Forced heat transfer
Potential-free output (fault message)
30
Standard delivery
Control panel, supplied separately
– Powder-coated surface
– Feed 208/3/60 Hz, control voltage 230 V or 24 V
– Freely programmable control unit
– Motor overload relay for all drives according to the
separate price items
– Inverter for fan motors
In the control panel door
– 4-pole mains isolator
– Graphics-capable touchscreen
– Documentation incl. fixed wiring diagram, terminal
connection diagram, operating instructions,
installation instructions in the guide folder
Sensors and switches installed on the feed screw
conveyor
– Infrared light barrier for level monitoring, barrier layer,
feed screw conveyor
– Safety limit switch on inspection cover of feed screw
conveyor
– Pt1000 contact temperature sensor on the feed
screw conveyor
Sensors and switches on the combustion block, the
combustion system and in the flue outlet (installation
on site)
– Infrared light barriers, fuel level monitoring in
combustion chamber
– Zirconium dioxide probe with measured value
transducer (Lambda probe)
– Pt1000 flue gas temperature sensor
Sensors and switches installed at top of boiler
– Pt1000 boiler water temperature sensor in flow
connector
– Pt1000 return temperature sensor in return
connector
– High limit safety cut-out
Sensor supplied
– 1 Pt1000 sensor with sensor well 1/2 " x 280 mm
(B28.1)
Integral LAN interface
Note: To extend the heating circuits, a controller module
(7453165) and one Pt1000 contact temperature
sensor per circuit (7528121) are required.
Vitoflex 300-RF Technical Data