Wolf CGB-2-24 - Boiler Conversion and Pump Function; Boiler Conversion Procedures

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32.Convertingfromcombiboilerto
boilerwithcylinder
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ow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ow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.
• Retthelledtrap.
• Open/ll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owblockandDHWreturnblock.
• Install the plate heat exchanger.
• Connecttheelectricalconnectionsontheowsensorand
the DHW outlet.
• Open/lltheheatingwater,DHWandcoldwaterlines.
Fig: Connection block removed
Cylinderow Cylinder return
Flow sensor
DHW sensor
Plate heat ex-
changer
Flow limiter
Fig: Combi boiler pipework
Flow block
DHW
Return block
DHW
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.
If changes have previously been made to control parameters
toadjustthesystem,makesuretorecordtheserst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conrm.
• Enter the contractor level password by rotating and pressing:
1111
• Rotate to Parameter reset Þ Factory setting YES