Viessmann VITOTRONIC300 Installation And Service Instructions Manual page 107

Vitotronic 300, GW2B Installation and Service
"Boiler" Group
(continued)
Coding in the factory set condition
0C:0 No function
0d:1 With Therm-Control, controls the mixing
valves of downstream heating circuits.
13:... Shutdown differential in K
The burner is switched off when the set
boiler water temperature is exceeded.
Factory set condition defaulted by boiler
coding card.
14:... Minimum burner runtime in min.
Factory set condition defaulted by boiler
coding card.
15.... Runtime servomotor mod. burner.
Factory set condition defaulted by boiler
coding card.
16:... Burner offset with start optimization in K
(temporary reduction of the set boiler water
temperature after burner start).
Factory set condition specified by the boiler
coding card.
1A:... Start optimization in min.
Factory set condition specified by the boiler
coding card.
1b Time from burner ignition to the start of
control.
Factory set condition defaulted by boiler
coding card.
1C:120
Signal B4 at plug fA is not available:
Compensation of signal delay for hours run
meter.
Time from burner start signal initiation at T2
in plug fA to opening of the solenoid valve.
At each burner start, 120 sec. will be taken
off the runtime.
1d:... Function, shunt pump.
Factory set condition defaulted by boiler
coding card.
Possible change
0C:1 Constant return temperature control.
Observe coding address "4E" in the group.
0d:0 Without Therm-Control.
13:0 Without stop differential.
13:2 Stop differential adjustable from 2 to 20 K.
to
13:20
14:0 Minimum runtime adjustable from 0 to 15
to min.
14:15
15:5 Runtime adjustable from 5 to 199 sec.
to
15:199
16:0 Offset adjustable from 0 to 15 K.
to
16:15
1A:0 Duration of start optimization adjustable from
to 0 to 60 min.
1A:60
1b:0 Regulation delay adjustable from 1 to 199 sec.
to
1b:199
1C:1 Delay adjustable from 1 to 199 sec.
to This time is deducted from the operating
1C:199 time for every burner start.
e.g. operating situations in which the burner
is shut down via the mechanical temperature
controller, but a burner demand is still
present (hours run continue to be counted).
If required, change coding address "06".
1d:0 Function according to boiler coding card.
1d:1 Shunt pump always runs when the burner
is active.
Code 2
107