Installation and operating instruction
Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact
6 Operation
83309302 1/2018-05 La
68-196
Combustion
Info
WTC-G ...
Combustion
Information
Description
1.2.3.1
Ionisation signal
SCOT base value
Maximum ionisation signal determined during the calculation procedure [ch. 3.3.4].
Replace ionisation electrode if:
WTC 15: <
70 points
WTC 25: <
75 points
1.2.3.2
Ionisation signal
Setpoint
Setpoint for excess air calculated using the SCOT® base value [ch. 3.3.4].
1.2.3.3
Ionisation signal
SCOT actual value
Current ionisation signal.
1.2.3.4
Ionisation signal Start
Minimum ionisation signal following flame detection at last burner start.
1.2.3.5
Gas valve Offset
Current compensation value from the control signal for the immersion coil from the
gas valve.
1.2.3.6
Time to flame formation
Time from gas release to flame formation at last burner start.
1.2.3.7
Gas valve
control signal
Current control signal at gas combi valve.
1.2.3.8
Gas-air compound
Current ratio of the control signals from the gas combi valve and fan.
1.2.3.9
Fan speed
Current speed signal from the fan.
1.2.3.10
Fan control signal
Current control signal at the fan (fan capacity).
1.2.3.11
Gas pressure
Current switching condition of the gas pressure switch.
unavailable
available
Only in conjunction with inbuilt gas pressure switch (accessory).