ᐅ The Wolf CGB 2-14 cycles continuously and consumes a lot of gas.

Hello,

Could someone please take a look at this? Our heating system (Wolf CGB 2-14) is short-cycling constantly and consuming an extremely high amount of gas.

House details:
Older building from 1972
Double-glazed windows about 15 years old
Relatively poor insulation
160 m2 (1,722 ft2) living area
Unheated basement

Brief background:
I changed several settings in the professional mode but was still unsatisfied. I reset the parameters, and since then the circulation pump stopped working.
Then, under "HG40 system configuration," I briefly set it to "K12_Diverter/PWT + heating circuit." This made the pump start again. I then immediately changed it back to "K01_Heating circuit." I returned to the main menu, and the heating system rebooted. Since then, it runs again but short-cycles endlessly. In addition, several new settings appeared, e.g., "HG14 function A1 or A17, A18."

Currently, the gas consumption is about 500 liters (also nearly 500 dollars/euros) per month (possibly a gas leak in the underground supply line?), only heating the ground floor (room temperature 20°C (68°F), 90 m2 (970 ft2)). The thermostats on the upper floor (room temperature 10°C (50°F), 70 m2 (753 ft2)) are set to 1 because that area is still under renovation.

There is only one hot water heating cycle per day (40°C (104°F)). (Once the gas consumption issue is resolved, we plan to activate the legionella prevention mode.)

Data:

Wolf CGB 2-14

•Professional mode heating unit
HG01 Burner hysteresis 12.0°C (21.6°F)
HG02 Minimum burner output 20%
HG03 Maximum burner output for hot water 70%
HG04 Maximum burner output for heating 60%
HG07 Post-run time for heating circuit pump 1 min
HG08/KM04 Max supply temperature 90.0°C (194.0°F)
HG09 Burner cycle lock time during heating operation 7 min
HG10 eBus address 1
HG12 Gas type LPG
HG13 Input E1 function None
HG14 Function A1 heating circuit pump (????)
HG15/MI20 Storage hysteresis 5.0°C (9.0°F)
HG16 Minimum heating circuit pump power 15%
HG17 Maximum heating circuit pump power 80%
HG19/MI13 Post-run time storage loading pump 3 min
HG20 Max storage loading time 120 min
HG21 Boiler minimum temperature TK-min 20.0°C (68.0°F)
HG22 Boiler maximum temperature TK-max 90.0°C (194.0°F)
HG23 Hot water max temperature 65°C (149°F)
HG25/M17 Boiler overtemperature during storage loading 15.0°C (27.0°F)
HG33 Hysteresis time 10 min
HG34 eBus feed-in automatic
HG37 Pump control type Linear
HG38 Target delta T pump control 20.0°C (36.0°F)
HG39 Soft start time 3 min
HG40 System configuration K01_Heating circuit
HG41 Pump power hot water 65%
HG42 Hysteresis collector 15.0°C (27.0°F)
HG43 Setback IO base 0
HG44 Offset GPV characteristic 30%
HG45 Flue gas length adjustment 2.5%
HG60 Minimal burner switch hysteresis 7°C (13°F)
HG61 Hot water control boiler

•Professional mode system
Function BM2: System
A00 Room influence factor 4
A04 Averaged outdoor sensor 3
A05 Room temperature correction 0.0°C (32°F)
A07 Anti-legionella function OFF
A08 Maintenance notification OFF
A09 Frost protection limit 2.0°C (36°F)
A10 Parallel operation release OFF
A11 Room shutdown ON
A12 Setback stop -10°C (14°F)
A13 Minimum hot water temperature 40.0°C (104°F)
A14 Maximum hot water temperature 65.0°C (149°F)
A15 Outdoor temperature correction 0.0
A16 Pure room control OFF
A17 Proportional control 20 K/K
A18 Integral control 1.0 K/(K*h)
A23 ALF start time 18:00
A24 PWS assignment: Together
A26 Smartphone access: ON

•Professional mode heating curve:
Base temperature 20.0°C (68°F)
Heating curve start point 20.0°C (68°F)
Standard outside temperature -14°C (7°F)
Flow temperature 90°C (194°F)

•Display
HG43 0
IO-Valley 32768
Ignition time ---.- s

•Heating circuit display directly
Request heating circuit automatic mode
Heating circuit status heating operation
Flow temperature: target=30.8°C (87°F) actual=33.7°C (92°F)
Heating circuit pump ON
Outside temperature 9.8°C (50°F)

•Heating unit display
Boiler temperature target=30.7°C (87°F) actual=29.8°C (85°F)
Return temperature 27.4°C (81°F)
Pressure 1.83
Hot water temperature target=10°C (50°F) actual=41.5°C (107°F)
Input E1 open
Current device power 41%
Pump speed 55%
Flue gas temperature 31.0°C (88°F)
Ionization 68
Fan speed 3420 rpm
Number of burner starts 34,321
Burner operating hours 7,308 h
Grid operating hours 18,583 h
Number of grid on 26
ZHP ON
LP OFF
A1 ON
3WUV heating circuit
FA ON
Software version 2.20

•Basic heating circuit settings
Savings factor 4.0
Winter-Summer switching 20°C (68°F)
ECO ABS 10°C (50°F)

Best regards, Jens

Then you should have a professional come and take a look.