Converting From Combi Boiler To Boiler With Cylinder - Wolf CGB-2 Series Installation Instructions For Contractors

The conversion must only be carried out by author-
ised contractors.
Combi boilers can be converted to boilers with cylinder and
vice versa (does not apply to CGB-2-14). This requires the
appropriate conversion kit from the Wolf accessories range.
Carry out the following steps:
1. Combi boiler to boiler with cylinder
• Disconnect the system from the power supply.
• The gas condensing boiler must be switched OFF.
Close the gas ball valve.
• Shut off/drain the heating water, DHW and cold water
lines.
• Disconnect the electrical connections on the flow sensor and
the DHW outlet sensor.
• At the panel for the combi boiler, disconnect the cold water
supply and the DHW outlet.
• Remove the trap.
• Remove the plate heat exchanger via the 2 knurled nuts
underneath the panel (Allen screw).
• Remove the two circlips that secure the DHW flow block and
the DHW return block to the panel.
Þ Push against the circlip with a screwdriver and release it
slightly using a second screwdriver.
Þ Pull off the circlips using needle-nosed pliers.
• Undo the plug-in connection to the 3-way valve and on the
DHW return block.
• Remove the disconnected assemblies.
• Install the cylinder heating inlet pipes and cylinder heating
outlet pipes. Secure pipes with the plug-in connection at the
3-way valve and the heating water return block. Then secure
the connections to the panel using the two circlips.
• Attach them to the free connections on the panel.
• Connect the cylinder sensor to the terminal strip on the
control unit.
• Refit the filled trap.
• Open/fill the heating water, DHW and cold water lines.
2. Boiler with cylinder to combi boiler
• Disconnect the system from the power supply.
• The gas condensing boiler must be switched OFF.
Close the gas ball valve.
• Shut off/drain the heating water, DHW and cold water
lines.
• Remove the cylinder heating inlet pipes and cylinder heating
outlet pipes.
• Terminate the cylinder sensor.
• Install the DHW flow block and DHW return block.
• Install the plate heat exchanger.
• Connect the electrical connections on the flow sensor and
the DHW outlet.
• Open/fill the heating water, DHW and cold water lines.
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32. Converting from combi boiler to
boiler with cylinder
If changes have previously been made to control parameters
to adjust the system, make sure to record these first and then
set them again after the master reset.
To carry out a parameter reset:
• Push the rotary selector on the display module.
• Select contractor level and confirm.
• Enter the contractor level password by rotating and pressing:
1111
• Rotate to Parameter reset Þ Factory setting YES
Flow block
DHW
Fig: Combi boiler pipework
Fig: Connection block removed
After conversion, carry out a master reset with the
power supply connected. Otherwise no heat de-
mand will be detected. This resets all parameters
to their factory settings.
DHW sensor
Plate heat ex- Flow limiter
changer
Cylinder flow Cylinder return
Flow sensor
Return block
DHW
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