Weishaupt WG20 1-C Z-LN Series - Program Sequence

Installation and operating instruction
Gas burner WG20…/1-C Z-LN
3 Product description
83054602 1/2020-01 La
14-96
3.3.4 Program sequence
Pre-purge
At heat demand, the actuator drives to full load position after the initialisation time
(TI) has elapsed.
The burner motor starts and the air pressure switch reacts.
The combustion chamber is pre-purged.
Ignition
Following the pre-purge phase(TV) the actuator drives to ignition position.
Ignition starts.
Fuel release
Following pre-ignition time (TVZ) valve1 opens and the gas pressure switch reacts.
Valve2 opens and releases the fuel.
Safety time
With fuel release, safety time (TS) and post-ignition time (TNZ) start.
The flame signal must be present within the safety time (TS).
Operation
The ionisation electrode monitors the flame.
The air damper actuator opens and closes depending on the regulator demand for
full load.
The residence time partial load (TVK) prevents cycling between partial and full load.
Post-purge
If there is no longer a heat demand, the solenoid valves close and stop the fuel
supply.
Post-purge time(TN) and valve proving begins [ch.3.3.2].
Following the post-purge time(TN) the burner motor switches off.
The air damper actuator drives to the Closed position.